migration

docs/design/v1-v2-database-migration.md

@@ -5,8 +5,27 @@
 - Use the `dev` branch database schema and migration registry as the V1 baseline.
 - Remove migrations that exist only on the V2 branch.
 - Generate one canonical migration from the `dev` schema to the final V2 schema.
-- Add explicit data operations to that migration where generated DDL is insufficient.
-- Test the migration against a populated database at the exact `dev` schema.
+- Keep the canonical migration focused on schema changes and dropping obsolete tables.
+- Run the V1 history backfill through an experimental server endpoint invoked by the CLI before it opens the TUI.
+- Show committed session progress while the endpoint runs.
+
+Expose `GET /api/experimental/migration/v1` for status and a blocking `POST /api/experimental/migration/v1` to run or
+resume the backfill. The status is `required`, `running`, or `completed`. On startup, the CLI checks status first and
+renders no migration UI when it is already complete. For required or running status, it shows a spinner and waits for the
+blocking POST without a request timeout. While migration runs, poll GET once per second and render completed and total
+session counts. GET derives total from all session rows and completed from rows through the stored cursor; the count
+advances only after a session transaction commits. The POST returns `{ status: "completed" }`. Do not add a background
+job or streaming progress protocol. Interrupted calls resume from the stored cursor.
+Initially, only interactive TUI startup performs this check; noninteractive run, ACP, raw API, service, health, version,
+and help flows do not trigger the backfill.
+
+Keep migration behavior in Core: status, semaphore, checkpointing, V1 decoding, transformation, and database writes.
+Protocol owns the experimental GET/POST contracts, Server handlers delegate to Core, and the interactive CLI owns only
+the status check and spinner presentation.
+
+Guard the endpoint with one process-local Effect `Semaphore`. Concurrent callers wait; after the active call completes,
+waiting callers acquire the permit, observe the completion key, and return immediately. No distributed lock is required
+for the current single elected server process.
 
 ## Preserve
 
@@ -15,20 +34,35 @@ The canonical V1 data remains in its existing tables. In particular, preserve `s
 Preserve `workspace` rows and existing `session.workspace_id` values unchanged. The migration must not clear or rebuild
 workspace relationships.
 
-Keep the `todo` table and its data unchanged. V2 does not currently migrate todos into another representation, and the
-generated migration must not drop the table.
+Preserve existing non-null `session.agent` and `session.model` selections. Fill missing values from the latest ordinary
+V1 user message ordered by `time_created` and `id`, excluding compaction and subtask-only messages. Copy agent, provider
+ID, model ID, and variant, normalizing an absent variant to `default`.
 
-## Truncate
+Recompute session usage aggregates from all canonical V1 assistant messages, including compaction or other internal
+assistants omitted from the V2 projection. Overwrite session cost and input, output, reasoning, cache-read, and
+cache-write token totals with those sums.
 
-Truncate these pre-launch V2 tables before applying schema changes:
+Clear persisted `session.revert` state. A staged revert is transient operational state and may refer to omitted projection
+rows or unavailable snapshots; it must not resume automatically after upgrading. Preserve the underlying messages,
+parts, and file history.
 
-- `event`
-- `event_sequence`
-- `session_message`
+Clear `session.time_compacting`, leave the new `time_suspended` column as `NULL`, and preserve session creation, update,
+and archive timestamps. Preserve project `time_initialized`; it is unrelated durable state.
 
-These rows are not canonical V1 data. Truncating `event` before adding the required `event.created` column means the
-column needs neither a backfill nor a default. After truncation, rebuild `session_message` from canonical V1 `message`
-and `part` rows rather than retaining its pre-launch V2 contents.
+Keep the legacy `todo` table and its data physically unchanged, but do not include it in the final V2 Drizzle schema.
+After generation, remove the generated `DROP TABLE todo` statement from the canonical migration so the table remains as
+unmanaged legacy storage.
+
+## Per-Session Replacement
+
+Do not truncate `event`, `event_sequence`, or `session_message` globally before the backfill. A whole-table delete can
+hold SQLite's writer lock long enough to block the running TUI.
+
+Replace each legacy session's V2 state inside that session's checkpointed migration transaction. Delete `event` rows for
+the session aggregate, delete its `session_message` rows, rebuild its projection from canonical V1 `message` and `part`
+rows, and overwrite its `event_sequence` watermark. If migration of that session fails, all replacements roll back and
+the durable cursor remains at the previously committed session. Rows owned by sessions outside the legacy migration set
+remain untouched.
 
 ## Message Backfill
 
@@ -36,9 +70,23 @@ Backfill canonical V1 history from `message` and `part` into `session_message`.
 the migration. Preserving the V1 tables alone keeps the data safe but does not make existing history visible through the
 V2 session APIs, which read `session_message`.
 
+Do not fail the whole migration when a V1 message or part payload cannot be decoded. Skip an undecodable message's V2
+projection and log its session and message IDs. Skip an undecodable part while continuing to map its message, and perform
+special-message pairing only with decoded rows. Assign sequences after filtering. Leave every malformed source row
+untouched in the V1 tables.
+
+Skip and log orphan parts whose source message does not exist and parts with unknown or unsupported types. Continue
+migrating the owning message and other valid parts. Include session, message, part ID, and observed type in warnings, and
+leave skipped source rows unchanged.
+
 Reuse each V1 `message.id` as the corresponding `session_message.id`. Stable IDs keep the migration deterministic and
 avoid rewriting other persisted state that may refer to a message.
 
+For ordinary user and assistant rows, preserve source `message.time_created` and `message.time_updated`. Entirely
+synthetic messages preserve their source timestamps, and synthetic rows split from mixed messages use the source user
+timestamps. A collapsed compaction uses the compaction user creation time and the later update time of the compaction
+user and summary assistant. Keep payload creation/completion times consistent with row timestamps.
+
 Within each session, order V1 messages by `time_created` and then `id`, matching the existing V1 message index. Assign
 contiguous `session_message.seq` values starting at `0`.
 
@@ -46,15 +94,122 @@ Map ordinary V1 messages one-to-one by role. Each ordinary V1 user message becom
 V1 assistant message becomes one V2 `assistant` row. Fold the source message's ordered V1 parts into that row's V2
 payload.
 
+Keep ordinary messages even when their transformed payload becomes empty after filtering. Preserve an empty V2 user row
+with `text: ""` and an empty V2 assistant row with `content: []` so IDs, chronology, and conversation structure remain
+stable. Omit only explicitly dropped internal concepts and undecodable messages.
+
 Handle semantic marker parts before applying the ordinary mapping. In particular, a V1 user message containing a
 `compaction` part and its paired assistant summary represent one compaction operation, not two ordinary messages. Special
 part mappings must be decided explicitly before implementing the backfill.
 
+Do not carry the V1 subtask concept into the V2 projection. Omit user messages containing only `subtask` parts and omit
+the paired assistant task-tool messages generated from those markers. For mixed user messages, ignore the `subtask`
+parts while preserving ordinary content, and still omit assistant task-tool messages generated by the skipped subtasks.
+Keep all source rows unchanged in the V1 `message` and `part` tables.
+
+Map ordinary V1 assistant `text` and `reasoning` parts into the V2 assistant `content` array in part order. Preserve text,
+including empty assistant text parts used as structural separators. Map V1 part metadata to optional V2 provider state.
+For reasoning, map `time.start` to `time.created` and optional `time.end` to `time.completed`.
+
+Preserve V1 tool parts that are `pending` or `running`, but convert them to terminal V2 tool error states. Preserve the
+call ID, tool name, parsed input, metadata, and available start time. Use the assistant message creation time when the V1
+state has no start time. Set the error to type `tool.interrupted` with message
+`Tool execution was interrupted before V2 migration`. Never resume migrated tool executions.
+
+For a completed V1 tool part, use `callID` as the V2 tool content ID and preserve the tool name and parsed input. Set the
+state to `completed`. Convert V1 output into the first text content item and convert stored output attachments into
+following file content items with their URI, MIME type, and filename. Preserve state metadata. Map `time.start` to
+`time.created` and `time.end` to `time.completed`. When `time.compacted` exists, use
+`[Old tool result content cleared]` as the only output and omit attachments.
+
+For a failed V1 tool part, preserve the call ID, tool name, parsed input, metadata, and timestamps, and set the V2 state
+to `error`. Convert the V1 error string to a structured error with type `tool.execution`. If V1 metadata contains a string
+`output`, preserve it as optional V2 text content. Map `time.start` to `time.created` and `time.end` to `time.completed`.
+
+For an ordinary V1 assistant message, preserve agent, provider ID, model ID, optional variant, creation and completion
+times, cost, and input/output/reasoning/cache token counts. Use `default` when the V1 variant is absent. Ignore V1
+`tokens.total` because it is derivable and V2 does not persist it.
+
+Use V1 assistant `parentID` only while pairing compactions and skipped subtasks with their originating user messages. Do
+not persist it in ordinary V2 assistant rows; V2 uses ordered history rather than user/assistant parent links.
+
+Ignore the optional V1 assistant `structured` output value. V2 has no equivalent top-level assistant field, and visible
+text and tool content are migrated separately. Retain the original structured value only in the V1 `message` row.
+
+Ignore V1 assistant `mode` and historical `path` (`cwd` and `root`). Mode is redundant with the preserved assistant
+agent, and historical filesystem paths do not belong to the V2 assistant message contract. Retain them only in the V1
+`message` row.
+
+For assistant finish reasons, preserve `stop`, `length`, `tool-calls`, `content-filter`, `error`, and `unknown`. Map every
+other nonempty V1 finish value to `unknown`, and leave the field absent when V1 omitted it. Do not retain unrecognized raw
+finish values in metadata.
+
+Map V1 assistant errors into the current V2 `{ type, message }` storage shape. Normalize Auth, content-filter, context
+overflow, structured-output, output-length, aborted, API, and unknown errors to the established V2 string conventions,
+preserve the message, and discard V1-only retryability and raw provider details.
+
+Ignore V1 `retry` parts. Do not populate the V2 assistant `retry` field during migration; historical retry state is not
+useful enough to preserve. The original retry rows remain in the V1 `part` table.
+
+Do not emit V2 assistant content for V1 `step-start` and `step-finish` parts. Use the first available
+`step-start.snapshot` as `assistant.snapshot.start` and the last available `step-finish.snapshot` as
+`assistant.snapshot.end`. Continue to source finish, cost, and tokens from the assistant message itself. Ignore step
+markers without snapshots.
+
+Do not emit assistant content for standalone V1 `snapshot` or `patch` parts. If no start snapshot came from `step-start`,
+use the first standalone snapshot value, then the first patch hash as a final fallback. Only `step-finish.snapshot` may
+populate the end snapshot. Merge patch file lists into `assistant.snapshot.files` in first-seen order with duplicates
+removed.
+
+V2 follow-up: replace the open `SessionError.Error` string shape with a properly typed persisted error union. This is not
+a blocker for the V1 migration, which should target the current storage contract.
+
 V1 synthetic content is represented by user text parts with `synthetic: true`, not by a separate message role. A V1 user
 message whose visible text parts are all synthetic should become a V2 `synthetic` message. If a V1 user message mixes
 ordinary and synthetic content, preserve the ordinary content in the V2 `user` row and emit the synthetic content as an
 adjacent V2 `synthetic` row. Ignore text parts marked `ignored`, matching V1 model-history behavior.
 
+For an ordinary V2 user message, take visible V1 text parts that are neither ignored nor synthetic, preserve part order,
+and join their text with `"\n\n"`. Use an empty string when the message contains attachments but no ordinary text.
+
+Ignore the optional V1 user-message `system` override. Do not create a V2 system message or preserve the override in
+metadata. The original value remains in the V1 `message` row.
+
+Ignore the optional V1 user-message `tools` map. It represented request-time tool enablement for a historical step and
+must not affect future V2 execution. The original value remains in the V1 `message` row.
+
+Ignore the optional V1 user-message `format` field and its schema. It controlled structured-output behavior for a
+historical request and must not affect future V2 runs. Preserve visible assistant text normally; retain the original
+format only in the V1 `message` row.
+
+Ignore V1 user-message `summary` metadata, including title, body, and diffs. V2 user messages have no equivalent field,
+and session-level summary data is already persisted separately. Retain the original summary only in the V1 `message`
+row.
+
+Map V1 `agent` parts into the V2 user message's `agents` array in part order. Preserve `name`. When the V1 part has
+`source`, map its `value`, `start`, and `end` into the V2 attachment's `mention.text`, `mention.start`, and `mention.end`.
+Omit `agents` when there are no agent parts.
+
+Do not read the filesystem or network while migrating V1 file attachments. Attachment migration must be deterministic
+from database contents alone. Convert persisted `data:` URLs; represent non-embedded `file:`, HTTP, and other external
+URLs with deterministic text rather than fetching them. Keep the original V1 `part` rows unchanged.
+
+For a V1 file backed by a `data:` URL, decode the URL and normalize its payload to base64 for the V2 attachment's `data`.
+Preserve `mime` and optional `filename` as `name`. Use a V2 `uri` source with the original URI for a V1 resource source;
+otherwise use an `inline` source. When V1 source text metadata exists, map its `value`, `start`, and `end` into the V2
+attachment mention. Leave `description` unset and preserve file-part order in the V2 `files` array.
+
+For a non-embedded V1 file, do not create a V2 file attachment. Append
+`[Attachment unavailable after migration: <name-or-url> (<mime>)]` to the V2 user text in original part order, separated
+by blank lines. Prefer the V1 filename, then resource URI, then part URL for the label. The original URL remains only in
+the preserved V1 `part` row.
+
+For a synthetic row split from a mixed user message, derive a generated-looking ID from the source message ID. Preserve
+the source ID's 12-character timestamp component and replace its 14-character random component with a deterministic
+base-62 encoding of a hash of `v1-synthetic:` plus the source message ID. If that candidate collides with an existing or
+derived message ID, deterministically retry with an incrementing salt. Place the synthetic row immediately after its
+source user row. Entirely synthetic messages continue to reuse their original message ID.
+
 Use the V1 compaction user message ID as the ID of the collapsed V2 compaction message. This matches V2's use of the
 admitted compaction input ID and preserves references to the initiating message.
 
@@ -64,9 +219,13 @@ serialize the retained V1 tail beginning at `tail_start_id` for `recent`. Use an
 retained, and use the compaction user message creation time. Do not emit the paired summary assistant as a separate V2
 assistant row.
 
-After rebuilding `session_message`, seed `event_sequence` with one row per migrated session. Set its watermark to that
-session's maximum backfilled `session_message.seq`. This prevents new V2 events from reusing sequence numbers or sorting
-before migrated history. The `event` table remains empty.
+Do not project incomplete or failed V1 compactions into `session_message`. Omit both the internal compaction user marker
+and its paired summary assistant when no successful summary was completed. Assign final sequence numbers after filtering
+so omitted compactions leave no gaps. Their source rows remain preserved in the V1 `message` and `part` tables.
+
+After rebuilding a session's `session_message`, replace its `event_sequence` watermark with that session's maximum
+backfilled `session_message.seq`. This prevents new V2 events from reusing sequence numbers or sorting before migrated
+history. The migrated session's prior `event` rows are removed in the same transaction.
 
 ## Drop
 
@@ -74,6 +233,7 @@ Drop these pre-launch V2 tables without preserving or transforming their rows:
 
 - `session_input`
 - `session_context_epoch`
+- `data_migration`
 
 Do not transfer `session_input` rows into `session_pending`.
 
@@ -103,16 +263,25 @@ schema.
 New nullable session columns, including `fork_session_id`, `fork_boundary`, and `time_suspended`, require no explicit
 backfill. Existing rows naturally receive `NULL` when the generated migration adds the columns.
 
-## Verification
+## Execution
 
-The canonical migration test should seed representative V1 sessions, messages, parts, todos, projects, accounts,
-credentials, permissions, shares, and workspaces. After migration, it should verify:
+Store V1 backfill state in `kv`; do not retain a dedicated `data_migration` table. Store the last successfully migrated
+session ID under `migration.v1-v2.session.cursor` and write `migration.v1-v2.completed` with value `true` after every
+session finishes. Delete the cursor key on completion and return immediately on later calls when the completion key
+exists.
 
-- Preserved rows and encoded values remain unchanged.
-- Todo rows remain available in the unchanged `todo` table.
-- `event` is empty, and stale pre-launch rows are absent from the rebuilt projections.
-- Backfilled `session_message` rows represent the canonical V1 `message` and `part` history.
-- Each migrated session's `event_sequence` watermark matches its maximum backfilled message sequence.
-- Dropped tables no longer exist.
-- New tables exist and are empty.
-- The final schema has no ungenerated changes.
+Absence of the completion key means migration is required, including on a fresh database. Running the endpoint against a
+database with no sessions completes immediately and writes the completion key; fresh database initialization does not
+seed migration state specially.
+
+Process sessions in stable ID order. Rebuild one session in one transaction, including its `session_message` rows,
+session-level backfills, `event_sequence` watermark, and cursor update. If interrupted during a session, that transaction
+rolls back and the next endpoint call retries the same session. If it committed, the next call continues after the stored
+cursor. Mark the migration complete after the final session and return immediately on later calls.
+
+Process every `session` row, including archived, root, child, and empty sessions, as well as sessions whose messages are
+all skipped or internal. Each successfully committed session advances the cursor.
+
+## Testing
+
+Detailed migration test design is deferred until after the canonical migration is implemented.

packages/cli/script/build.ts

@@ -61,7 +61,7 @@ for (const item of targets) {
     name: "parcel-watcher-binding",
     setup(build) {
       build.onLoad({ filter: /filesystem\/watcher-binding\.ts$/ }, () => ({
-        contents: `import binding from ${JSON.stringify(parcelWatcherPackage)}; export default () => binding`,
+        contents: `export default () => require(${JSON.stringify(parcelWatcherPackage)})`,
         loader: "js",
       }))
     },

packages/cli/src/server-process.ts

@@ -8,7 +8,7 @@ import { OPENCODE_CHANNEL, OPENCODE_VERSION } from "./version"
 import { AppProcess } from "@opencode-ai/util/process"
 import { randomBytes, randomUUID } from "node:crypto"
 import path from "node:path"
-import { Effect, FileSystem, Logger, Option, Redacted, Schedule, Schema } from "effect"
+import { Effect, FileSystem, Option, Redacted, Schedule, Schema } from "effect"
 import { HttpServer } from "effect/unstable/http"
 import { Env } from "./env"
 import { ServiceConfig } from "./services/service-config"
@@ -81,7 +81,7 @@ const processEffect = Effect.fnUntraced(function* (options: Options) {
           database: {
             path:
               process.env.OPENCODE_DB ??
-              (["latest", "beta", "prod"].includes(OPENCODE_CHANNEL) ||
+              (["latest", "beta", "next", "prod"].includes(OPENCODE_CHANNEL) ||
               process.env.OPENCODE_DISABLE_CHANNEL_DB === "1" ||
               process.env.OPENCODE_DISABLE_CHANNEL_DB === "true"
                 ? "opencode.db"
@@ -108,9 +108,7 @@ const processEffect = Effect.fnUntraced(function* (options: Options) {
             gitbash: process.env.OPENCODE_GIT_BASH_PATH,
           },
           fs: {
-            filewatcher: !truthy(
-              process.env.OPENCODE_FILEWATCHER_DISABLE ?? process.env.OPENCODE_DISABLE_FILEWATCHER,
-            ),
+            filewatcher: !truthy(process.env.OPENCODE_FILEWATCHER_DISABLE ?? process.env.OPENCODE_DISABLE_FILEWATCHER),
             fff:
               process.env.OPENCODE_DISABLE_FFF === undefined
                 ? process.platform !== "win32"
@@ -128,7 +126,6 @@ const processEffect = Effect.fnUntraced(function* (options: Options) {
                 }),
             },
       ).pipe(
-        Effect.provide(Logger.layer([], { mergeWithExisting: false })),
         Effect.catch((error) => {
           if (serviceOptions === undefined || port === undefined || !addressInUse(error)) return Effect.fail(error)
           return recognizeIncumbent(serviceOptions, hostname, port).pipe(

packages/client/src/effect/api/api.ts

@@ -283,6 +283,26 @@ export type Endpoint5_26Input = {
 }
 export type Endpoint5_26Output =
   | (
+      | {
+          readonly id: Event.ID
+          readonly created: DateTime.Utc
+          readonly metadata?: { readonly [x: string]: unknown } | undefined
+          readonly type: "session.created"
+          readonly durable: { readonly aggregateID: string; readonly seq: Event.Seq; readonly version: Event.Version }
+          readonly location?: Location.Ref | undefined
+          readonly data: {
+            readonly sessionID: Session.ID
+            readonly projectID: Project.ID
+            readonly location: Location.Ref
+            readonly subpath?: RelativePath | undefined
+            readonly parentID?: Session.ID | undefined
+            readonly slug: string
+            readonly title?: string | undefined
+            readonly agent?: Agent.ID | undefined
+            readonly model?: Model.Ref | undefined
+            readonly version: string
+          }
+        }
       | {
           readonly id: Event.ID
           readonly created: DateTime.Utc
@@ -1538,19 +1558,33 @@ export interface DebugApi<E = never> {
   readonly location: { readonly list: DebugLocationListOperation<E>; readonly evict: DebugLocationEvictOperation<E> }
 }
 
-export type Endpoint27_0Input = {
+export type Endpoint27_0Output = {
+  readonly status: "required" | "running" | "completed"
+  readonly completed: number
+  readonly total: number
+}
+export type MigrationV1StatusOperation<E = never> = () => Effect.Effect<Endpoint27_0Output, E>
+
+export type Endpoint27_1Output = { readonly status: "completed" }
+export type MigrationV1RunOperation<E = never> = () => Effect.Effect<Endpoint27_1Output, E>
+
+export interface MigrationApi<E = never> {
+  readonly v1: { readonly status: MigrationV1StatusOperation<E>; readonly run: MigrationV1RunOperation<E> }
+}
+
+export type Endpoint28_0Input = {
   readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
 }
-export type Endpoint27_0Output = { readonly location: Location.Info; readonly data: ReadonlyArray<WebSearch.Provider> }
-export type WebsearchProvidersOperation<E = never> = (input?: Endpoint27_0Input) => Effect.Effect<Endpoint27_0Output, E>
+export type Endpoint28_0Output = { readonly location: Location.Info; readonly data: ReadonlyArray<WebSearch.Provider> }
+export type WebsearchProvidersOperation<E = never> = (input?: Endpoint28_0Input) => Effect.Effect<Endpoint28_0Output, E>
 
-export type Endpoint27_1Input = {
+export type Endpoint28_1Input = {
   readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
   readonly query: string
   readonly providerID?: WebSearch.ID | undefined
 }
-export type Endpoint27_1Output = { readonly location: Location.Info; readonly data: WebSearch.Response }
-export type WebsearchQueryOperation<E = never> = (input: Endpoint27_1Input) => Effect.Effect<Endpoint27_1Output, E>
+export type Endpoint28_1Output = { readonly location: Location.Info; readonly data: WebSearch.Response }
+export type WebsearchQueryOperation<E = never> = (input: Endpoint28_1Input) => Effect.Effect<Endpoint28_1Output, E>
 
 export interface WebsearchApi<E = never> {
   readonly providers: WebsearchProvidersOperation<E>
@@ -1585,5 +1619,6 @@ export interface AppApi<E = never> {
   readonly projectCopy: ProjectCopyApi<E>
   readonly vcs: VcsApi<E>
   readonly debug: DebugApi<E>
+  readonly migration: MigrationApi<E>
   readonly websearch: WebsearchApi<E>
 }

packages/client/src/effect/generated/client.ts

@@ -215,10 +215,12 @@ import type {
   Endpoint26_0Output,
   Endpoint26_1Input,
   Endpoint26_1Output,
-  Endpoint27_0Input,
   Endpoint27_0Output,
-  Endpoint27_1Input,
   Endpoint27_1Output,
+  Endpoint28_0Input,
+  Endpoint28_0Output,
+  Endpoint28_1Input,
+  Endpoint28_1Output,
 } from "../api/api.js"
 import { ClientError } from "./client-error"
 
@@ -1217,22 +1219,32 @@ const adaptGroup26 = (raw: RawClient["server.debug"]) => ({
   location: { list: Endpoint26_0(raw), evict: Endpoint26_1(raw) },
 })
 
-const Endpoint27_0 = (raw: RawClient["server.websearch"]) => (input?: Endpoint27_0Input) =>
-  preserveEffect<Endpoint27_0Output>()(
+const Endpoint27_0 = (raw: RawClient["server.migration"]) => () =>
+  preserveEffect<Endpoint27_0Output>()(raw["migration.v1.status"]({}).pipe(Effect.mapError(mapClientError)))
+
+const Endpoint27_1 = (raw: RawClient["server.migration"]) => () =>
+  preserveEffect<Endpoint27_1Output>()(raw["migration.v1.run"]({}).pipe(Effect.mapError(mapClientError)))
+
+const adaptGroup27 = (raw: RawClient["server.migration"]) => ({
+  v1: { status: Endpoint27_0(raw), run: Endpoint27_1(raw) },
+})
+
+const Endpoint28_0 = (raw: RawClient["server.websearch"]) => (input?: Endpoint28_0Input) =>
+  preserveEffect<Endpoint28_0Output>()(
     raw["websearch.providers"]({ query: { location: input?.["location"] } }).pipe(Effect.mapError(mapClientError)),
   )
 
-const Endpoint27_1 = (raw: RawClient["server.websearch"]) => (input: Endpoint27_1Input) =>
-  preserveEffect<Endpoint27_1Output>()(
+const Endpoint28_1 = (raw: RawClient["server.websearch"]) => (input: Endpoint28_1Input) =>
+  preserveEffect<Endpoint28_1Output>()(
     raw["websearch.query"]({
       query: { location: input["location"] },
       payload: { query: input["query"], providerID: input["providerID"] },
     }).pipe(Effect.mapError(mapClientError)),
   )
 
-const adaptGroup27 = (raw: RawClient["server.websearch"]) => ({
-  providers: Endpoint27_0(raw),
-  query: Endpoint27_1(raw),
+const adaptGroup28 = (raw: RawClient["server.websearch"]) => ({
+  providers: Endpoint28_0(raw),
+  query: Endpoint28_1(raw),
 })
 
 const adaptClient = (raw: RawClient) => ({
@@ -1263,7 +1275,8 @@ const adaptClient = (raw: RawClient) => ({
   projectCopy: adaptGroup24(raw["server.projectCopy"]),
   vcs: adaptGroup25(raw["server.vcs"]),
   debug: adaptGroup26(raw["server.debug"]),
-  websearch: adaptGroup27(raw["server.websearch"]),
+  migration: adaptGroup27(raw["server.migration"]),
+  websearch: adaptGroup28(raw["server.websearch"]),
 })
 
 export const make = (options?: { readonly baseUrl?: URL | string }) =>

packages/client/src/promise/generated/client.ts

@@ -211,6 +211,8 @@ import type {
   DebugLocationListOutput,
   DebugLocationEvictInput,
   DebugLocationEvictOutput,
+  MigrationV1StatusOutput,
+  MigrationV1RunOutput,
   WebsearchProvidersInput,
   WebsearchProvidersOutput,
   WebsearchQueryInput,
@@ -492,7 +494,7 @@ export function make(options: ClientOptions) {
             method: "GET",
             path: `/api/session/${encodeURIComponent(input.sessionID)}`,
             successStatus: 200,
-            declaredStatuses: [404, 400, 401],
+            declaredStatuses: [404, 401, 400],
             empty: false,
           },
           requestOptions,
@@ -718,7 +720,7 @@ export function make(options: ClientOptions) {
             method: "GET",
             path: `/api/session/${encodeURIComponent(input.sessionID)}/context`,
             successStatus: 200,
-            declaredStatuses: [404, 500, 400, 401],
+            declaredStatuses: [404, 500, 401, 400],
             empty: false,
           },
           requestOptions,
@@ -730,7 +732,7 @@ export function make(options: ClientOptions) {
               method: "GET",
               path: `/api/session/${encodeURIComponent(input.sessionID)}/pending`,
               successStatus: 200,
-              declaredStatuses: [404, 400, 401],
+              declaredStatuses: [404, 401, 400],
               empty: false,
             },
             requestOptions,
@@ -793,7 +795,7 @@ export function make(options: ClientOptions) {
             path: `/api/experimental/session/${encodeURIComponent(input.sessionID)}/log`,
             query: { after: input["after"], follow: input["follow"] },
             successStatus: 200,
-            declaredStatuses: [404, 400, 401],
+            declaredStatuses: [404, 401, 400],
             empty: false,
           },
           requestOptions,
@@ -826,7 +828,7 @@ export function make(options: ClientOptions) {
             method: "GET",
             path: `/api/session/${encodeURIComponent(input.sessionID)}/message/${encodeURIComponent(input.messageID)}`,
             successStatus: 200,
-            declaredStatuses: [404, 400, 401],
+            declaredStatuses: [404, 401, 400],
             empty: false,
           },
           requestOptions,
@@ -1768,6 +1770,32 @@ export function make(options: ClientOptions) {
           ),
       },
     },
+    migration: {
+      v1: {
+        status: (requestOptions?: RequestOptions) =>
+          request<MigrationV1StatusOutput>(
+            {
+              method: "GET",
+              path: `/api/experimental/migration/v1`,
+              successStatus: 200,
+              declaredStatuses: [401, 400],
+              empty: false,
+            },
+            requestOptions,
+          ),
+        run: (requestOptions?: RequestOptions) =>
+          request<MigrationV1RunOutput>(
+            {
+              method: "POST",
+              path: `/api/experimental/migration/v1`,
+              successStatus: 200,
+              declaredStatuses: [401, 400],
+              empty: false,
+            },
+            requestOptions,
+          ),
+      },
+    },
     websearch: {
       providers: (input?: WebsearchProvidersInput, requestOptions?: RequestOptions) =>
         request<WebsearchProvidersOutput>(

packages/client/src/promise/generated/types.ts

@@ -313,164 +313,6 @@ export type SkillInfo = {
   content: string
 }
 
-export type FileDiffLegacyInfo = {
-  file?: string
-  patch?: string
-  additions: number
-  deletions: number
-  status?: "added" | "deleted" | "modified"
-}
-
-export type PermissionV1Action = "allow" | "deny" | "ask"
-
-export type SessionV1JSONSchema = { [x: string]: any }
-
-export type ProviderAuthError = { name: "ProviderAuthError"; data: { providerID: string; message: string } }
-
-export type UnknownError2 = { name: "UnknownError"; data: { message: string; ref?: string | undefined } }
-
-export type MessageOutputLengthError = { name: "MessageOutputLengthError"; data: {} }
-
-export type MessageAbortedError = { name: "MessageAbortedError"; data: { message: string } }
-
-export type StructuredOutputError = { name: "StructuredOutputError"; data: { message: string; retries: number } }
-
-export type ContextOverflowError = {
-  name: "ContextOverflowError"
-  data: { message: string; responseBody?: string | undefined }
-}
-
-export type ContentFilterError = { name: "ContentFilterError"; data: { message: string } }
-
-export type APIError = {
-  name: "APIError"
-  data: {
-    message: string
-    statusCode?: number | undefined
-    isRetryable: boolean
-    responseHeaders?: { [x: string]: string } | undefined
-    responseBody?: string | undefined
-    metadata?: { [x: string]: string } | undefined
-  }
-}
-
-export type SessionV1TextPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "text"
-  text: string
-  synthetic?: boolean | undefined
-  ignored?: boolean | undefined
-  time?: { start: number; end?: number | undefined } | undefined
-  metadata?: { [x: string]: any } | undefined
-}
-
-export type SessionV1SubtaskPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "subtask"
-  prompt: string
-  description: string
-  agent: string
-  model?: { providerID: string; modelID: string } | undefined
-  command?: string | undefined
-}
-
-export type SessionV1ReasoningPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "reasoning"
-  text: string
-  metadata?: { [x: string]: any } | undefined
-  time: { start: number; end?: number | undefined }
-}
-
-export type SessionV1FilePartSourceText = { value: string; start: number; end: number }
-
-export type SessionV1Range = { start: { line: number; character: number }; end: { line: number; character: number } }
-
-export type SessionV1ToolStatePending = { status: "pending"; input: { [x: string]: any }; raw: string }
-
-export type SessionV1ToolStateRunning = {
-  status: "running"
-  input: { [x: string]: any }
-  title?: string | undefined
-  metadata?: { [x: string]: any } | undefined
-  time: { start: number }
-}
-
-export type SessionV1ToolStateError = {
-  status: "error"
-  input: { [x: string]: any }
-  error: string
-  metadata?: { [x: string]: any } | undefined
-  time: { start: number; end: number }
-}
-
-export type SessionV1StepStartPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "step-start"
-  snapshot?: string | undefined
-}
-
-export type SessionV1StepFinishPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "step-finish"
-  reason: string
-  snapshot?: string | undefined
-  cost: number
-  tokens: {
-    total?: number | undefined
-    input: number
-    output: number
-    reasoning: number
-    cache: { read: number; write: number }
-  }
-}
-
-export type SessionV1SnapshotPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "snapshot"
-  snapshot: string
-}
-
-export type SessionV1PatchPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "patch"
-  hash: string
-  files: Array<string>
-}
-
-export type SessionV1AgentPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "agent"
-  name: string
-  source?: { value: string; start: number; end: number } | undefined
-}
-
-export type SessionV1CompactionPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "compaction"
-  auto: boolean
-  overflow?: boolean | undefined
-  tail_start_id?: string | undefined
-}
-
 export type PermissionReply = "once" | "always" | "reject"
 
 export type Pty = {
@@ -569,6 +411,27 @@ export type ProviderRequest = {
 
 export type PermissionRule = { action: string; resource: string; effect: PermissionEffect }
 
+export type SessionCreated = {
+  id: string
+  created: number
+  metadata?: { [x: string]: any }
+  type: "session.created"
+  durable: { aggregateID: string; seq: number; version: 1 }
+  location?: LocationRef
+  data: {
+    sessionID: string
+    projectID: string
+    location: LocationRef
+    subpath?: string
+    parentID?: string
+    slug: string
+    title?: string
+    agent?: string
+    model?: ModelRef
+    version: string
+  }
+}
+
 export type SessionAgentSelected = {
   id: string
   created: number
@@ -862,26 +725,6 @@ export type AgentUpdated = {
   data: {}
 }
 
-export type MessageRemoved = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "message.removed"
-  durable: { aggregateID: string; seq: number; version: 1 }
-  location?: LocationRef
-  data: { sessionID: string; messageID: string }
-}
-
-export type MessagePartRemoved = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "message.part.removed"
-  durable: { aggregateID: string; seq: number; version: 1 }
-  location?: LocationRef
-  data: { sessionID: string; messageID: string; partID: string }
-}
-
 export type SessionUsageUpdated = {
   id: string
   created: number
@@ -1537,96 +1380,6 @@ export type PermissionAsked = {
   }
 }
 
-export type PermissionV1Rule = { permission: string; pattern: string; action: PermissionV1Action }
-
-export type SessionV1OutputFormat =
-  | { type: "text" }
-  | { type: "json_schema"; schema: SessionV1JSONSchema; retryCount?: number | undefined | undefined }
-
-export type SessionV1AssistantMessage = {
-  id: string
-  sessionID: string
-  role: "assistant"
-  time: { created: number; completed?: number | undefined }
-  error?:
-    | ProviderAuthError
-    | UnknownError2
-    | MessageOutputLengthError
-    | MessageAbortedError
-    | StructuredOutputError
-    | ContextOverflowError
-    | ContentFilterError
-    | APIError
-    | undefined
-  parentID: string
-  modelID: string
-  providerID: string
-  mode: string
-  agent: string
-  path: { cwd: string; root: string }
-  summary?: boolean | undefined
-  cost: number
-  tokens: {
-    total?: number | undefined
-    input: number
-    output: number
-    reasoning: number
-    cache: { read: number; write: number }
-  }
-  structured?: any | undefined
-  variant?: string | undefined
-  finish?: string | undefined
-}
-
-export type SessionV1RetryPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "retry"
-  attempt: number
-  error: APIError
-  time: { created: number }
-}
-
-export type SessionError = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "session.error"
-  location?: LocationRef
-  data: {
-    sessionID?: string | undefined
-    error?:
-      | ProviderAuthError
-      | UnknownError2
-      | MessageOutputLengthError
-      | MessageAbortedError
-      | StructuredOutputError
-      | ContextOverflowError
-      | ContentFilterError
-      | APIError
-      | undefined
-  }
-}
-
-export type SessionV1FileSource = { text: SessionV1FilePartSourceText; type: "file"; path: string }
-
-export type SessionV1ResourceSource = {
-  text: SessionV1FilePartSourceText
-  type: "resource"
-  clientName: string
-  uri: string
-}
-
-export type SessionV1SymbolSource = {
-  text: SessionV1FilePartSourceText
-  type: "symbol"
-  path: string
-  range: SessionV1Range
-  name: string
-  kind: number
-}
-
 export type PermissionReplied = {
   id: string
   created: number
@@ -1904,23 +1657,6 @@ export type FormReplied = {
   data: { id: string; sessionID: string; answer: FormAnswer }
 }
 
-export type PermissionV1Ruleset = Array<PermissionV1Rule>
-
-export type SessionV1UserMessage = {
-  id: string
-  sessionID: string
-  role: "user"
-  time: { created: number }
-  format?: SessionV1OutputFormat | undefined
-  summary?: { title?: string | undefined; body?: string | undefined; diffs: Array<FileDiffLegacyInfo> } | undefined
-  agent: string
-  model: { providerID: string; modelID: string; variant?: string | undefined }
-  system?: string | undefined
-  tools?: { [x: string]: boolean } | undefined
-}
-
-export type SessionV1FilePartSource = SessionV1FileSource | SessionV1SymbolSource | SessionV1ResourceSource
-
 export type QuestionAsked = {
   id: string
   created: number
@@ -1998,41 +1734,6 @@ export type IntegrationMethod =
 
 export type FormFields = [FormField, ...Array<FormField>]
 
-export type SessionV1Info = {
-  id: string
-  slug: string
-  projectID: string
-  workspaceID?: string
-  directory: string
-  path?: string
-  parentID?: string
-  summary?: { additions: number; deletions: number; files: number; diffs?: Array<FileDiffLegacyInfo> }
-  cost?: number
-  tokens?: { input: number; output: number; reasoning: number; cache: { read: number; write: number } }
-  share?: { url: string }
-  title?: string
-  agent?: string
-  model?: { id: string; providerID: string; variant?: string }
-  version: string
-  metadata?: { [x: string]: any }
-  time: { created: number; updated: number; compacting?: number; archived?: number }
-  permission?: PermissionV1Ruleset
-  revert?: { messageID: string; partID?: string; snapshot?: string; diff?: string }
-}
-
-export type SessionV1Message = SessionV1UserMessage | SessionV1AssistantMessage
-
-export type SessionV1FilePart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "file"
-  mime: string
-  filename?: string | undefined
-  url: string
-  source?: SessionV1FilePartSource | undefined
-}
-
 export type FormFields1 = [FormField1, ...Array<FormField1>]
 
 export type SessionPendingInfo = SessionPendingUser | SessionPendingSynthetic | SessionPendingCompaction
@@ -2064,56 +1765,6 @@ export type IntegrationInfo = {
 
 export type FormInfo = { id: string; sessionID: string; title: string; metadata?: FormMetadata; fields: FormFields }
 
-export type SessionCreated = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "session.created"
-  durable: { aggregateID: string; seq: number; version: 1 }
-  location?: LocationRef
-  data: { sessionID: string; info: SessionV1Info }
-}
-
-export type SessionUpdated = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "session.updated"
-  durable: { aggregateID: string; seq: number; version: 1 }
-  location?: LocationRef
-  data: { sessionID: string; info: SessionV1Info }
-}
-
-export type SessionDeleted1 = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "session.deleted"
-  durable: { aggregateID: string; seq: number; version: 1 }
-  location?: LocationRef
-  data: { sessionID: string; info: SessionV1Info }
-}
-
-export type MessageUpdated = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "message.updated"
-  durable: { aggregateID: string; seq: number; version: 1 }
-  location?: LocationRef
-  data: { sessionID: string; info: SessionV1Message }
-}
-
-export type SessionV1ToolStateCompleted = {
-  status: "completed"
-  input: { [x: string]: any }
-  output: string
-  title: string
-  metadata: { [x: string]: any }
-  time: { start: number; end: number; compacted?: number | undefined }
-  attachments?: Array<SessionV1FilePart> | undefined
-}
-
 export type FormInfo1 = { id: string; sessionID: string; title: string; metadata?: FormMetadata1; fields: FormFields1 }
 
 export type SessionInputAdmitted = {
@@ -2137,12 +1788,6 @@ export type SessionMessageInfo =
   | SessionMessageAssistant
   | SessionMessageCompaction
 
-export type SessionV1ToolState =
-  | SessionV1ToolStatePending
-  | SessionV1ToolStateRunning
-  | SessionV1ToolStateCompleted
-  | SessionV1ToolStateError
-
 export type FormCreated = {
   id: string
   created: number
@@ -2153,6 +1798,7 @@ export type FormCreated = {
 }
 
 export type SessionEventDurable =
+  | SessionCreated
   | SessionAgentSelected
   | SessionModelSelected
   | SessionMoved
@@ -2197,43 +1843,6 @@ export type SessionMessagesResponse = {
   cursor: { previous?: string | null; next?: string | null }
 }
 
-export type SessionV1ToolPart = {
-  id: string
-  sessionID: string
-  messageID: string
-  type: "tool"
-  callID: string
-  tool: string
-  state: SessionV1ToolState
-  metadata?: { [x: string]: any } | undefined
-}
-
-export type SessionLogItem = SessionEventDurable | EventLogSynced
-
-export type SessionV1Part =
-  | SessionV1TextPart
-  | SessionV1SubtaskPart
-  | SessionV1ReasoningPart
-  | SessionV1FilePart
-  | SessionV1ToolPart
-  | SessionV1StepStartPart
-  | SessionV1StepFinishPart
-  | SessionV1SnapshotPart
-  | SessionV1PatchPart
-  | SessionV1AgentPart
-  | SessionV1RetryPart
-  | SessionV1CompactionPart
-
-export type MessagePartUpdated = {
-  id: string
-  created: number
-  metadata?: { [x: string]: any }
-  type: "message.part.updated"
-  durable: { aggregateID: string; seq: number; version: 1 }
-  location?: LocationRef
-  data: { sessionID: string; part: SessionV1Part; time: number }
-}
-
 export type V2Event =
   | ModelsDevRefreshed
   | IntegrationUpdated
@@ -2241,12 +1850,6 @@ export type V2Event =
   | CatalogUpdated
   | AgentUpdated
   | SessionCreated
-  | SessionUpdated
-  | SessionDeleted1
-  | MessageUpdated
-  | MessageRemoved
-  | MessagePartUpdated
-  | MessagePartRemoved
   | SessionAgentSelected
   | SessionModelSelected
   | SessionMoved
@@ -2325,9 +1928,10 @@ export type V2Event =
   | VcsBranchUpdated
   | McpStatusChanged
   | McpResourcesChanged
-  | SessionError
   | V2EventServerConnected
 
+export type SessionLogItem = SessionEventDurable | EventLogSynced
+
 export type UnauthorizedError = { readonly _tag: "UnauthorizedError"; readonly message: string }
 export const isUnauthorizedError = (value: unknown): value is UnauthorizedError =>
   typeof value === "object" && value !== null && "_tag" in value && value["_tag"] === "UnauthorizedError"
@@ -4961,6 +4565,10 @@ export type DebugLocationEvictInput = {
 
 export type DebugLocationEvictOutput = void
 
+export type MigrationV1StatusOutput = { status: "required" | "running" | "completed"; completed: number; total: number }
+
+export type MigrationV1RunOutput = { status: "completed" }
+
 export type WebsearchProvidersInput = {
   readonly location?: {
     readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined

packages/core/package.json

@@ -9,6 +9,7 @@
     "db": "bun drizzle-kit",
     "migration": "bun run script/migration.ts",
     "fix-node-pty": "bun run script/fix-node-pty.ts",
+    "benchmark:location": "bun run script/benchmark-location.ts",
     "test": "bun test --only-failures",
     "typecheck": "tsgo --noEmit"
   },

packages/core/schema.json

@@ -1,19 +1,15 @@
 {
   "version": "7",
   "dialect": "sqlite",
-  "id": "e43ed7e2-b9fc-4178-beae-3646e4a976e1",
+  "id": "2d214a71-3b0a-48c1-a667-741952c4e188",
   "prevIds": [
-    "db37a97f-9b5e-4c87-be8b-4feace35136c"
+    "f14a9b18-8207-487e-a3d3-227e629ba9ad"
   ],
   "ddl": [
     {
       "name": "workspace",
       "entityType": "tables"
     },
-    {
-      "name": "data_migration",
-      "entityType": "tables"
-    },
     {
       "name": "account_state",
       "entityType": "tables"
@@ -66,14 +62,6 @@
       "name": "instruction_state",
       "entityType": "tables"
     },
-    {
-      "name": "message",
-      "entityType": "tables"
-    },
-    {
-      "name": "part",
-      "entityType": "tables"
-    },
     {
       "name": "session_message",
       "entityType": "tables"
@@ -83,11 +71,7 @@
       "entityType": "tables"
     },
     {
-      "name": "session",
-      "entityType": "tables"
-    },
-    {
-      "name": "session_share",
+      "name": "session_v2",
       "entityType": "tables"
     },
     {
@@ -170,26 +154,6 @@
       "entityType": "columns",
       "table": "workspace"
     },
-    {
-      "type": "text",
-      "notNull": false,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "name",
-      "entityType": "columns",
-      "table": "data_migration"
-    },
-    {
-      "type": "integer",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "time_completed",
-      "entityType": "columns",
-      "table": "data_migration"
-    },
     {
       "type": "integer",
       "notNull": false,
@@ -534,7 +498,7 @@
       "type": "integer",
       "notNull": true,
       "autoincrement": false,
-      "default": null,
+      "default": "0",
       "generated": null,
       "name": "created",
       "entityType": "columns",
@@ -960,116 +924,6 @@
       "entityType": "columns",
       "table": "instruction_state"
     },
-    {
-      "type": "text",
-      "notNull": false,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "id",
-      "entityType": "columns",
-      "table": "message"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "session_id",
-      "entityType": "columns",
-      "table": "message"
-    },
-    {
-      "type": "integer",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "time_created",
-      "entityType": "columns",
-      "table": "message"
-    },
-    {
-      "type": "integer",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "time_updated",
-      "entityType": "columns",
-      "table": "message"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "data",
-      "entityType": "columns",
-      "table": "message"
-    },
-    {
-      "type": "text",
-      "notNull": false,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "id",
-      "entityType": "columns",
-      "table": "part"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "message_id",
-      "entityType": "columns",
-      "table": "part"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "session_id",
-      "entityType": "columns",
-      "table": "part"
-    },
-    {
-      "type": "integer",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "time_created",
-      "entityType": "columns",
-      "table": "part"
-    },
-    {
-      "type": "integer",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "time_updated",
-      "entityType": "columns",
-      "table": "part"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "data",
-      "entityType": "columns",
-      "table": "part"
-    },
     {
       "type": "text",
       "notNull": false,
@@ -1218,7 +1072,7 @@
       "generated": null,
       "name": "id",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1228,7 +1082,7 @@
       "generated": null,
       "name": "project_id",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1238,7 +1092,7 @@
       "generated": null,
       "name": "workspace_id",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1248,7 +1102,7 @@
       "generated": null,
       "name": "parent_id",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1258,7 +1112,7 @@
       "generated": null,
       "name": "fork_session_id",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1268,7 +1122,7 @@
       "generated": null,
       "name": "fork_boundary",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1278,7 +1132,7 @@
       "generated": null,
       "name": "slug",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1288,7 +1142,7 @@
       "generated": null,
       "name": "directory",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1298,7 +1152,7 @@
       "generated": null,
       "name": "path",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1308,7 +1162,7 @@
       "generated": null,
       "name": "title",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1318,7 +1172,7 @@
       "generated": null,
       "name": "version",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1328,7 +1182,7 @@
       "generated": null,
       "name": "share_url",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1338,7 +1192,7 @@
       "generated": null,
       "name": "summary_additions",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1348,7 +1202,7 @@
       "generated": null,
       "name": "summary_deletions",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1358,7 +1212,7 @@
       "generated": null,
       "name": "summary_files",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1368,7 +1222,7 @@
       "generated": null,
       "name": "summary_diffs",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1378,7 +1232,7 @@
       "generated": null,
       "name": "metadata",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "real",
@@ -1388,7 +1242,7 @@
       "generated": null,
       "name": "cost",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1398,7 +1252,7 @@
       "generated": null,
       "name": "tokens_input",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1408,7 +1262,7 @@
       "generated": null,
       "name": "tokens_output",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1418,7 +1272,7 @@
       "generated": null,
       "name": "tokens_reasoning",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1428,7 +1282,7 @@
       "generated": null,
       "name": "tokens_cache_read",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1438,7 +1292,7 @@
       "generated": null,
       "name": "tokens_cache_write",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1448,7 +1302,7 @@
       "generated": null,
       "name": "revert",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1458,7 +1312,7 @@
       "generated": null,
       "name": "permission",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1468,7 +1322,7 @@
       "generated": null,
       "name": "agent",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "text",
@@ -1478,7 +1332,7 @@
       "generated": null,
       "name": "model",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1488,7 +1342,7 @@
       "generated": null,
       "name": "time_created",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1498,7 +1352,7 @@
       "generated": null,
       "name": "time_updated",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1508,7 +1362,7 @@
       "generated": null,
       "name": "time_compacting",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1518,7 +1372,7 @@
       "generated": null,
       "name": "time_archived",
       "entityType": "columns",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "type": "integer",
@@ -1528,67 +1382,7 @@
       "generated": null,
       "name": "time_suspended",
       "entityType": "columns",
-      "table": "session"
-    },
-    {
-      "type": "text",
-      "notNull": false,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "session_id",
-      "entityType": "columns",
-      "table": "session_share"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "id",
-      "entityType": "columns",
-      "table": "session_share"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "secret",
-      "entityType": "columns",
-      "table": "session_share"
-    },
-    {
-      "type": "text",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "url",
-      "entityType": "columns",
-      "table": "session_share"
-    },
-    {
-      "type": "integer",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "time_created",
-      "entityType": "columns",
-      "table": "session_share"
-    },
-    {
-      "type": "integer",
-      "notNull": true,
-      "autoincrement": false,
-      "default": null,
-      "generated": null,
-      "name": "time_updated",
-      "entityType": "columns",
-      "table": "session_share"
+      "table": "session_v2"
     },
     {
       "columns": [
@@ -1669,14 +1463,14 @@
       "columns": [
         "session_id"
       ],
-      "tableTo": "session",
+      "tableTo": "session_v2",
       "columnsTo": [
         "id"
       ],
       "onUpdate": "NO ACTION",
       "onDelete": "CASCADE",
       "nameExplicit": false,
-      "name": "fk_instruction_entry_session_id_session_id_fk",
+      "name": "fk_instruction_entry_session_id_session_v2_id_fk",
       "entityType": "fks",
       "table": "instruction_entry"
     },
@@ -1684,14 +1478,14 @@
       "columns": [
         "session_id"
       ],
-      "tableTo": "session",
+      "tableTo": "session_v2",
       "columnsTo": [
         "id"
       ],
       "onUpdate": "NO ACTION",
       "onDelete": "CASCADE",
       "nameExplicit": false,
-      "name": "fk_instruction_state_session_id_session_id_fk",
+      "name": "fk_instruction_state_session_id_session_v2_id_fk",
       "entityType": "fks",
       "table": "instruction_state"
     },
@@ -1699,44 +1493,14 @@
       "columns": [
         "session_id"
       ],
-      "tableTo": "session",
+      "tableTo": "session_v2",
       "columnsTo": [
         "id"
       ],
       "onUpdate": "NO ACTION",
       "onDelete": "CASCADE",
       "nameExplicit": false,
-      "name": "fk_message_session_id_session_id_fk",
-      "entityType": "fks",
-      "table": "message"
-    },
-    {
-      "columns": [
-        "message_id"
-      ],
-      "tableTo": "message",
-      "columnsTo": [
-        "id"
-      ],
-      "onUpdate": "NO ACTION",
-      "onDelete": "CASCADE",
-      "nameExplicit": false,
-      "name": "fk_part_message_id_message_id_fk",
-      "entityType": "fks",
-      "table": "part"
-    },
-    {
-      "columns": [
-        "session_id"
-      ],
-      "tableTo": "session",
-      "columnsTo": [
-        "id"
-      ],
-      "onUpdate": "NO ACTION",
-      "onDelete": "CASCADE",
-      "nameExplicit": false,
-      "name": "fk_session_message_session_id_session_id_fk",
+      "name": "fk_session_message_session_id_session_v2_id_fk",
       "entityType": "fks",
       "table": "session_message"
     },
@@ -1744,14 +1508,14 @@
       "columns": [
         "session_id"
       ],
-      "tableTo": "session",
+      "tableTo": "session_v2",
       "columnsTo": [
         "id"
       ],
       "onUpdate": "NO ACTION",
       "onDelete": "CASCADE",
       "nameExplicit": false,
-      "name": "fk_session_input_session_id_session_id_fk",
+      "name": "fk_session_pending_session_id_session_v2_id_fk",
       "entityType": "fks",
       "table": "session_pending"
     },
@@ -1766,24 +1530,9 @@
       "onUpdate": "NO ACTION",
       "onDelete": "CASCADE",
       "nameExplicit": false,
-      "name": "fk_session_project_id_project_id_fk",
+      "name": "fk_session_v2_project_id_project_id_fk",
       "entityType": "fks",
-      "table": "session"
-    },
-    {
-      "columns": [
-        "session_id"
-      ],
-      "tableTo": "session",
-      "columnsTo": [
-        "id"
-      ],
-      "onUpdate": "NO ACTION",
-      "onDelete": "CASCADE",
-      "nameExplicit": false,
-      "name": "fk_session_share_session_id_session_id_fk",
-      "entityType": "fks",
-      "table": "session_share"
+      "table": "session_v2"
     },
     {
       "columns": [
@@ -1824,15 +1573,6 @@
       "table": "workspace",
       "entityType": "pks"
     },
-    {
-      "columns": [
-        "name"
-      ],
-      "nameExplicit": false,
-      "name": "data_migration_pk",
-      "table": "data_migration",
-      "entityType": "pks"
-    },
     {
       "columns": [
         "id"
@@ -1923,24 +1663,6 @@
       "table": "instruction_state",
       "entityType": "pks"
     },
-    {
-      "columns": [
-        "id"
-      ],
-      "nameExplicit": false,
-      "name": "message_pk",
-      "table": "message",
-      "entityType": "pks"
-    },
-    {
-      "columns": [
-        "id"
-      ],
-      "nameExplicit": false,
-      "name": "part_pk",
-      "table": "part",
-      "entityType": "pks"
-    },
     {
       "columns": [
         "id"
@@ -1955,7 +1677,7 @@
         "id"
       ],
       "nameExplicit": false,
-      "name": "session_input_pk",
+      "name": "session_pending_pk",
       "table": "session_pending",
       "entityType": "pks"
     },
@@ -1964,17 +1686,8 @@
         "id"
       ],
       "nameExplicit": false,
-      "name": "session_pk",
-      "table": "session",
-      "entityType": "pks"
-    },
-    {
-      "columns": [
-        "session_id"
-      ],
-      "nameExplicit": false,
-      "name": "session_share_pk",
-      "table": "session_share",
+      "name": "session_v2_pk",
+      "table": "session_v2",
       "entityType": "pks"
     },
     {
@@ -2039,60 +1752,6 @@
       "entityType": "indexes",
       "table": "permission"
     },
-    {
-      "columns": [
-        {
-          "value": "session_id",
-          "isExpression": false
-        },
-        {
-          "value": "time_created",
-          "isExpression": false
-        },
-        {
-          "value": "id",
-          "isExpression": false
-        }
-      ],
-      "isUnique": false,
-      "where": null,
-      "origin": "manual",
-      "name": "message_session_time_created_id_idx",
-      "entityType": "indexes",
-      "table": "message"
-    },
-    {
-      "columns": [
-        {
-          "value": "message_id",
-          "isExpression": false
-        },
-        {
-          "value": "id",
-          "isExpression": false
-        }
-      ],
-      "isUnique": false,
-      "where": null,
-      "origin": "manual",
-      "name": "part_message_id_id_idx",
-      "entityType": "indexes",
-      "table": "part"
-    },
-    {
-      "columns": [
-        {
-          "value": "session_id",
-          "isExpression": false
-        }
-      ],
-      "isUnique": false,
-      "where": null,
-      "origin": "manual",
-      "name": "part_session_idx",
-      "entityType": "indexes",
-      "table": "part"
-    },
     {
       "columns": [
         {
@@ -2233,9 +1892,9 @@
       "isUnique": false,
       "where": null,
       "origin": "manual",
-      "name": "session_project_idx",
+      "name": "session_v2_project_idx",
       "entityType": "indexes",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "columns": [
@@ -2247,9 +1906,9 @@
       "isUnique": false,
       "where": null,
       "origin": "manual",
-      "name": "session_workspace_idx",
+      "name": "session_v2_workspace_idx",
       "entityType": "indexes",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "columns": [
@@ -2261,9 +1920,9 @@
       "isUnique": false,
       "where": null,
       "origin": "manual",
-      "name": "session_parent_idx",
+      "name": "session_v2_parent_idx",
       "entityType": "indexes",
-      "table": "session"
+      "table": "session_v2"
     },
     {
       "columns": [
@@ -2273,11 +1932,11 @@
         }
       ],
       "isUnique": false,
-      "where": "\"session\".\"time_suspended\" is not null",
+      "where": "\"session_v2\".\"time_suspended\" is not null",
       "origin": "manual",
-      "name": "session_time_suspended_idx",
+      "name": "session_v2_time_suspended_idx",
       "entityType": "indexes",
-      "table": "session"
+      "table": "session_v2"
     }
   ],
   "renames": []

packages/core/script/benchmark-location.ts

@@ -0,0 +1,70 @@
+import path from "path"
+import { Effect, Logger } from "effect"
+import { AppNodeBuilder } from "../src/effect/app-node-builder"
+import { LayerNode } from "@opencode-ai/util/effect/layer-node"
+import { Database } from "../src/database/database"
+import { Bus } from "../src/bus"
+import { SdkPlugins } from "../src/plugin/sdk"
+import { Location } from "../src/location"
+import { LocationServiceMap } from "../src/location-service-map"
+import { AbsolutePath } from "../src/schema"
+
+const args = process.argv.slice(2)
+const iterationsIndex = args.indexOf("--iterations")
+const iterations = iterationsIndex === -1 ? 10 : Number(args[iterationsIndex + 1])
+const directory = args.find((arg, index) => !arg.startsWith("--") && index !== iterationsIndex + 1) ?? process.cwd()
+
+if (!Number.isInteger(iterations) || iterations < 1) {
+  console.error("--iterations must be a positive integer")
+  process.exit(1)
+}
+
+const ref = Location.Ref.make({ directory: AbsolutePath.make(path.resolve(directory)) })
+const layer = AppNodeBuilder.build(
+  LayerNode.group([Database.node, Bus.node, SdkPlugins.node, LocationServiceMap.node]),
+)
+
+const measure = <A, E, R>(effect: Effect.Effect<A, E, R>) =>
+  Effect.gen(function* () {
+    const start = performance.now()
+    yield* effect
+    return performance.now() - start
+  })
+
+const stats = (samples: ReadonlyArray<number>) => {
+  const sorted = samples.toSorted((a, b) => a - b)
+  const percentile = (value: number) => sorted[Math.min(Math.ceil(sorted.length * value) - 1, sorted.length - 1)]
+  return {
+    mean: samples.reduce((total, sample) => total + sample, 0) / samples.length,
+    min: sorted[0] ?? 0,
+    p50: percentile(0.5),
+    p95: percentile(0.95),
+    max: sorted.at(-1) ?? 0,
+  }
+}
+
+const print = (name: string, samples: ReadonlyArray<number>) => {
+  const result = stats(samples)
+  console.log(
+    `${name.padEnd(12)} mean ${result.mean.toFixed(2)} ms  min ${result.min.toFixed(2)} ms  p50 ${result.p50.toFixed(2)} ms  p95 ${result.p95.toFixed(2)} ms  max ${result.max.toFixed(2)} ms`,
+  )
+}
+
+const program = Effect.gen(function* () {
+  const locations = yield* LocationServiceMap.Service
+  const load = locations.contextEffect(ref).pipe(Effect.scoped)
+
+  const first = yield* measure(load)
+  const cached = yield* Effect.forEach(Array.from({ length: iterations }), () => measure(load))
+  const cold = yield* Effect.forEach(Array.from({ length: iterations }), () =>
+    locations.invalidate(ref).pipe(Effect.andThen(measure(load))),
+  )
+
+  console.log(`Location: ${ref.directory}`)
+  console.log(`Iterations: ${iterations}`)
+  print("first", [first])
+  print("cached", cached)
+  print("cold", cold)
+}).pipe(Effect.scoped, Effect.provide(layer), Effect.provide(Logger.layer([])))
+
+await Effect.runPromise(program)

packages/core/script/migration.ts

@@ -1,6 +1,5 @@
 #!/usr/bin/env bun
 
-import { $ } from "bun"
 import fs from "fs/promises"
 import os from "os"
 import path from "path"
@@ -100,9 +99,14 @@ async function drizzle(temporary: string, output: string, name?: string) {
 export default { ...config, out: ${JSON.stringify(output)} }
 `,
   )
-  await $`bun drizzle-kit generate --config ${config} ${name ? ["--name", name] : []}`.cwd(
-    path.join(root, "packages/core"),
-  )
+  const child = Bun.spawn(["bun", "drizzle-kit", "generate", "--config", config, ...(name ? ["--name", name] : [])], {
+    cwd: path.join(root, "packages/core"),
+    stdin: "inherit",
+    stdout: "inherit",
+    stderr: "inherit",
+  })
+  const exit = await child.exited
+  if (exit !== 0) throw new Error(`Drizzle generation failed with exit code ${exit}.`)
 }
 
 async function generatedMigrations(directory: string) {

packages/core/src/data-migration.sql.ts

@@ -1,6 +0,0 @@
-import { integer, sqliteTable, text } from "drizzle-orm/sqlite-core"
-
-export const DataMigrationTable = sqliteTable("data_migration", {
-  name: text().primaryKey(),
-  time_completed: integer().notNull(),
-})

packages/core/src/database/migration.gen.ts

@@ -40,24 +40,6 @@ export const migrations = (
     import("./migration/20260622142730_simplify_session_context_epoch"),
     import("./migration/20260622170816_reset_v2_session_state"),
     import("./migration/20260622202450_simplify_session_input"),
-    import("./migration/20260702134641_add_session_context_entry"),
-    import("./migration/20260703090000_reset_v2_event_rename_sweep"),
-    import("./migration/20260703181610_event_created_column"),
-    import("./migration/20260703190000_reset_v2_shell_event_payloads"),
-    import("./migration/20260703200000_reset_v2_session_events"),
-    import("./migration/20260705180000_rename_instructions"),
-    import("./migration/20260706223930_add-session-fork"),
-    import("./migration/20260707010146_durable_session_inbox"),
-    import("./migration/20260707120000_migrate_prelaunch_v2_state"),
-    import("./migration/20260709013000_generic_session_input"),
-    import("./migration/20260709025533_drop-todo"),
-    import("./migration/20260709163752_time_suspended"),
-    import("./migration/20260709190621_session_pending_table"),
-    import("./migration/20260710025429_instruction_sync"),
-    import("./migration/20260716020354_kv"),
-    import("./migration/20260722011141_delete_tool_progress_events"),
-    import("./migration/20260722170000_canonical_tool_results"),
-    import("./migration/20260729022634_session_fork_boundary"),
-    import("./migration/20260730195856_optional_session_title"),
+    import("./migration/20260804233008_loose_psylocke"),
   ])
 ).map((module) => module.default) satisfies DatabaseMigration.Migration[]

packages/core/src/database/migration.ts

@@ -12,6 +12,7 @@ const lock = Semaphore.makeUnsafe(1)
 
 export type Migration = {
   id: string
+  foreignKeys?: boolean
   up: (tx: Transaction) => Effect.Effect<void, unknown>
 }
 
@@ -21,8 +22,11 @@ export function apply(db: Database) {
       const tables = yield* db.all<{ name: string }>(
         sql`SELECT name FROM sqlite_master WHERE type = 'table' AND name NOT LIKE 'sqlite_%'`,
       )
-      if (tables.some((table) => table.name === "session")) return yield* applyOnly(db, migrations)
+      if (tables.some((table) => table.name === "session" || table.name === "session_v2"))
+        return yield* applyOnly(db, migrations)
       if (tables.length > 0) return yield* Effect.die(new Error("Database is not empty and has no session table"))
+      const started = Date.now()
+      yield* Effect.logInfo("database schema bootstrap started", { migrations: migrations.length })
       yield* db.transaction((tx) =>
         Effect.gen(function* () {
           yield* schema.up(tx)
@@ -36,6 +40,10 @@ export function apply(db: Database) {
           )
         }),
       )
+      yield* Effect.logInfo("database schema bootstrap completed", {
+        migrations: migrations.length,
+        durationMs: Date.now() - started,
+      })
     }),
   )
 }
@@ -68,7 +76,9 @@ export function applyOnly(db: Database, input: Migration[]) {
 
     for (const migration of input) {
       if (completed.has(migration.id)) continue
-      yield* db.transaction((tx) =>
+      const started = Date.now()
+      yield* Effect.logInfo("database migration started", { migration: migration.id })
+      const apply = db.transaction((tx) =>
         Effect.gen(function* () {
           yield* migration.up(tx)
           yield* tx.run(
@@ -76,6 +86,37 @@ export function applyOnly(db: Database, input: Migration[]) {
           )
         }),
       )
+      if (migration.foreignKeys !== false) {
+        yield* apply.pipe(
+          Effect.tapError((error) =>
+            Effect.logError("database migration failed", {
+              migration: migration.id,
+              durationMs: Date.now() - started,
+              error,
+            }),
+          ),
+        )
+        yield* Effect.logInfo("database migration completed", {
+          migration: migration.id,
+          durationMs: Date.now() - started,
+        })
+        continue
+      }
+      yield* db.run(sql`PRAGMA foreign_keys = OFF`)
+      yield* apply.pipe(
+        Effect.ensuring(db.run(sql`PRAGMA foreign_keys = ON`).pipe(Effect.orDie)),
+        Effect.tapError((error) =>
+          Effect.logError("database migration failed", {
+            migration: migration.id,
+            durationMs: Date.now() - started,
+            error,
+          }),
+        ),
+      )
+      yield* Effect.logInfo("database migration completed", {
+        migration: migration.id,
+        durationMs: Date.now() - started,
+      })
     }
   })
 }

packages/core/src/database/migration/20260622170816_reset_v2_session_state.ts

@@ -10,8 +10,6 @@ export default {
       yield* tx.run(`DELETE FROM \`session_message\`;`)
       yield* tx.run(`DELETE FROM \`event\`;`)
       yield* tx.run(`DELETE FROM \`event_sequence\`;`)
-      yield* tx.run(`UPDATE \`session\` SET \`workspace_id\` = NULL WHERE \`workspace_id\` IS NOT NULL;`)
-      yield* tx.run(`DELETE FROM \`workspace\`;`)
     })
   },
 } satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260702134641_add_session_context_entry.ts

@@ -1,21 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260702134641_add_session_context_entry",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`
-        CREATE TABLE \`session_context_entry\` (
-          \`session_id\` text NOT NULL,
-          \`key\` text NOT NULL,
-          \`value\` text NOT NULL,
-          \`time_created\` integer NOT NULL,
-          \`time_updated\` integer NOT NULL,
-          CONSTRAINT \`session_context_entry_pk\` PRIMARY KEY(\`session_id\`, \`key\`),
-          CONSTRAINT \`fk_session_context_entry_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260703090000_reset_v2_event_rename_sweep.ts

@@ -1,17 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260703090000_reset_v2_event_rename_sweep",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`DELETE FROM \`session_input\`;`)
-      yield* tx.run(`DELETE FROM \`session_message\`;`)
-      yield* tx.run(`DELETE FROM \`event\`;`)
-      yield* tx.run(`DELETE FROM \`event_sequence\`;`)
-      // `created` column is added by the generated 20260703181610_event_created_column
-      // migration, which runs after this wipe (NOT NULL without default is safe on the
-      // emptied table).
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260703181610_event_created_column.ts

@@ -1,11 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260703181610_event_created_column",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`event\` ADD \`created\` integer NOT NULL;`)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260703190000_reset_v2_shell_event_payloads.ts

@@ -1,14 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260703190000_reset_v2_shell_event_payloads",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`DELETE FROM \`session_input\`;`)
-      yield* tx.run(`DELETE FROM \`session_message\`;`)
-      yield* tx.run(`DELETE FROM \`event\`;`)
-      yield* tx.run(`DELETE FROM \`event_sequence\`;`)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260703200000_reset_v2_session_events.ts

@@ -1,14 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260703200000_reset_v2_session_events",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`DELETE FROM \`session_input\`;`)
-      yield* tx.run(`DELETE FROM \`session_message\`;`)
-      yield* tx.run(`DELETE FROM \`event\`;`)
-      yield* tx.run(`DELETE FROM \`event_sequence\`;`)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260705180000_rename_instructions.ts

@@ -1,17 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260705180000_rename_instructions",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`session_context_entry\` RENAME TO \`instruction_entry\``)
-      yield* tx.run(`ALTER TABLE \`session_context_epoch\` RENAME TO \`instruction_checkpoint\``)
-      yield* tx.run(`
-        UPDATE \`event\`
-        SET \`type\` = 'session.instructions.updated.1'
-        WHERE \`type\` = 'session.context.updated.1'
-      `)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260706223930_add-session-fork.ts

@@ -1,39 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260706223930_add-session-fork",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`session\` ADD \`fork_session_id\` text;`)
-      yield* tx.run(`ALTER TABLE \`session\` ADD \`fork_message_id\` text;`)
-      yield* tx.run(`
-        UPDATE \`session\`
-        SET
-          \`parent_id\` = NULL,
-          \`fork_session_id\` = (
-            SELECT json_extract(\`event\`.\`data\`, '$.parentID')
-            FROM \`event\`
-            WHERE \`event\`.\`aggregate_id\` = \`session\`.\`id\`
-              AND \`event\`.\`type\` = 'session.forked'
-            ORDER BY \`event\`.\`seq\`
-            LIMIT 1
-          ),
-          \`fork_message_id\` = (
-            SELECT json_extract(\`event\`.\`data\`, '$.from')
-            FROM \`event\`
-            WHERE \`event\`.\`aggregate_id\` = \`session\`.\`id\`
-              AND \`event\`.\`type\` = 'session.forked'
-            ORDER BY \`event\`.\`seq\`
-            LIMIT 1
-          )
-        WHERE EXISTS (
-          SELECT 1
-          FROM \`event\`
-          WHERE \`event\`.\`aggregate_id\` = \`session\`.\`id\`
-            AND \`event\`.\`type\` = 'session.forked'
-        );
-      `)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260707010146_durable_session_inbox.ts

@@ -1,43 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260707010146_durable_session_inbox",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`PRAGMA foreign_keys=OFF;`)
-      yield* tx.run(`
-        CREATE TABLE \`__new_session_input\` (
-          \`id\` text PRIMARY KEY,
-          \`session_id\` text NOT NULL,
-          \`type\` text NOT NULL,
-          \`prompt\` text,
-          \`delivery\` text,
-          \`admitted_seq\` integer NOT NULL,
-          \`promoted_seq\` integer,
-          \`time_created\` integer NOT NULL,
-          CONSTRAINT \`fk_session_input_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      yield* tx.run(
-        `INSERT INTO \`__new_session_input\`(\`id\`, \`session_id\`, \`type\`, \`prompt\`, \`delivery\`, \`admitted_seq\`, \`promoted_seq\`, \`time_created\`) SELECT \`id\`, \`session_id\`, 'prompt', \`prompt\`, \`delivery\`, \`admitted_seq\`, \`promoted_seq\`, \`time_created\` FROM \`session_input\`;`,
-      )
-      yield* tx.run(`DROP TABLE \`session_input\`;`)
-      yield* tx.run(`ALTER TABLE \`__new_session_input\` RENAME TO \`session_input\`;`)
-      yield* tx.run(`PRAGMA foreign_keys=ON;`)
-      yield* tx.run(`DROP INDEX IF EXISTS \`session_input_session_pending_delivery_seq_idx\`;`)
-      yield* tx.run(
-        `CREATE INDEX \`session_input_session_pending_type_delivery_seq_idx\` ON \`session_input\` (\`session_id\`,\`promoted_seq\`,\`type\`,\`delivery\`,\`admitted_seq\`);`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_input_session_pending_compaction_idx\` ON \`session_input\` (\`session_id\`) WHERE "session_input"."type" = 'compaction' and "session_input"."promoted_seq" is null;`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_input_session_admitted_seq_idx\` ON \`session_input\` (\`session_id\`,\`admitted_seq\`);`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_input_session_promoted_seq_idx\` ON \`session_input\` (\`session_id\`,\`promoted_seq\`);`,
-      )
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260707120000_migrate_prelaunch_v2_state.ts

@@ -1,227 +0,0 @@
-import { sql } from "drizzle-orm"
-import { Effect, Schema } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-const decodeJson = Schema.decodeUnknownSync(Schema.UnknownFromJsonString)
-const isObject = Schema.is(Schema.Record(Schema.String, Schema.Unknown))
-
-export default {
-  id: "20260707120000_migrate_prelaunch_v2_state",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(
-        sql`DELETE FROM session_message WHERE type = 'compaction' AND json_extract(data, '$.status') = 'queued'`,
-      )
-      const messages = yield* tx.all<{ id: string; type: string; data: string }>(
-        sql`SELECT id, type, data FROM session_message WHERE type IN ('skill', 'shell', 'assistant', 'compaction', 'synthetic')`,
-      )
-      for (const row of messages) {
-        const data = object(decodeJson(row.data))
-        yield* tx.run(
-          sql`UPDATE session_message SET data = ${JSON.stringify(messageData(row.type, data))} WHERE id = ${row.id}`,
-        )
-      }
-
-      yield* tx.run(sql`DELETE FROM event WHERE type = 'session.compaction.delta.1'`)
-      const events = yield* tx.all<{ id: string; aggregateID: string; seq: number; type: string; data: string }>(sql`
-        SELECT id, aggregate_id as aggregateID, seq, type, data
-        FROM event
-        WHERE type IN (
-          'session.skill.activated.1',
-          'session.skill.activated.2',
-          'session.compaction.started.1',
-          'session.compaction.started.2',
-          'session.compaction.ended.1',
-          'session.compaction.failed.1',
-          'session.compaction.failed.2',
-          'session.revert.staged.1',
-          'session.revert.staged.2'
-        )
-        ORDER BY aggregate_id, seq
-      `)
-      const compactionReasons = new Map<string, "auto" | "manual">()
-      for (const row of events) {
-        const data = object(decodeJson(row.data))
-        if (row.type.startsWith("session.compaction.ended.")) {
-          compactionReasons.delete(row.aggregateID)
-          continue
-        }
-        const event = eventData(row.type, data, compactionReasons.get(row.aggregateID))
-        if (row.type.startsWith("session.compaction.started."))
-          compactionReasons.set(row.aggregateID, event.data.reason === "auto" ? "auto" : "manual")
-        if (row.type.startsWith("session.compaction.failed.")) compactionReasons.delete(row.aggregateID)
-        yield* tx.run(
-          sql`UPDATE event SET type = ${event.type}, data = ${JSON.stringify(event.data)} WHERE id = ${row.id}`,
-        )
-      }
-    })
-  },
-} satisfies DatabaseMigration.Migration
-
-function messageData(type: string, data: Record<string, unknown>) {
-  if (type === "skill")
-    return defined({
-      metadata: data.metadata,
-      time: data.time,
-      skill: data.skill ?? data.id ?? data.name,
-      name: data.name,
-      text: data.text,
-    })
-  if (type === "shell") {
-    const shell = object(data.shell)
-    return defined({
-      metadata: data.metadata,
-      time: data.time,
-      shellID: data.shellID ?? shell.id,
-      command: data.command ?? shell.command,
-      status: data.status ?? shell.status,
-      exit: data.exit ?? shell.exit,
-      output: data.output,
-    })
-  }
-  if (type === "assistant")
-    return defined({
-      metadata: data.metadata,
-      time: data.time,
-      agent: data.agent,
-      model: data.model,
-      content: Array.isArray(data.content) ? data.content.map(assistantContent) : data.content,
-      snapshot: data.snapshot,
-      finish: data.finish,
-      cost: data.cost,
-      tokens: data.tokens,
-      error: data.error,
-      retry: data.retry,
-    })
-  if (type === "compaction") {
-    if (data.status === "failed")
-      return defined({
-        metadata: data.metadata,
-        time: data.time,
-        status: data.status,
-        reason: data.reason,
-        error: data.error ?? genericCompactionError,
-      })
-    return defined({
-      metadata: data.metadata,
-      time: data.time,
-      status: data.status,
-      reason: data.reason,
-      summary: data.summary,
-      recent: data.recent,
-    })
-  }
-  if (type === "synthetic")
-    return defined({ metadata: data.metadata, time: data.time, text: data.text, description: data.description })
-  const { sessionID: _, ...current } = data
-  return current
-}
-
-function assistantContent(value: unknown) {
-  const content = object(value)
-  if (content.type === "text") return defined({ type: content.type, text: content.text })
-  if (content.type === "reasoning")
-    return defined({ type: content.type, text: content.text, state: content.state, time: content.time })
-  if (content.type !== "tool") return content
-  return defined({
-    type: content.type,
-    id: content.id,
-    name: content.name,
-    executed: content.executed,
-    providerState: content.providerState,
-    providerResultState: content.providerResultState,
-    state: toolState(content.state),
-    time: content.time,
-  })
-}
-
-function toolState(value: unknown) {
-  const state = object(value)
-  if (state.status === "pending" || state.status === "streaming")
-    return defined({ status: "streaming", input: state.input })
-  if (state.status === "running")
-    return defined({ status: state.status, input: state.input, structured: state.structured, content: state.content })
-  if (state.status === "completed")
-    return defined({
-      status: state.status,
-      input: state.input,
-      structured: state.structured,
-      content: state.content,
-      result: state.result,
-    })
-  if (state.status === "error")
-    return defined({
-      status: state.status,
-      input: state.input,
-      structured: state.structured,
-      content: state.content,
-      error: state.error,
-      result: state.result,
-    })
-  return state
-}
-
-function eventData(type: string, data: Record<string, unknown>, compactionReason?: "auto" | "manual") {
-  if (type.startsWith("session.skill.activated."))
-    return {
-      type: "session.skill.activated.1",
-      data: defined({ sessionID: data.sessionID, id: data.id ?? data.name, name: data.name, text: data.text }),
-    }
-  if (type.startsWith("session.compaction.started."))
-    return {
-      type: "session.compaction.started.1",
-      data: defined({
-        sessionID: data.sessionID,
-        reason: data.reason,
-        recent: data.recent ?? "",
-        inputID: data.inputID,
-      }),
-    }
-  if (type.startsWith("session.compaction.failed."))
-    return {
-      type: "session.compaction.failed.1",
-      data: defined({
-        sessionID: data.sessionID,
-        reason: data.reason ?? compactionReason ?? "manual",
-        error: data.error ?? genericCompactionError,
-        inputID: data.inputID,
-      }),
-    }
-  const revert = object(data.revert)
-  return {
-    type: "session.revert.staged.1",
-    data: defined({
-      sessionID: data.sessionID,
-      revert: defined({
-        messageID: revert.messageID,
-        partID: revert.partID,
-        snapshot: revert.snapshot,
-        files: Array.isArray(revert.files)
-          ? revert.files.map((value) => {
-              const file = object(value)
-              return defined({
-                file: file.file ?? file.path,
-                patch: file.patch,
-                additions: file.additions,
-                deletions: file.deletions,
-                status: file.status,
-              })
-            })
-          : undefined,
-      }),
-    }),
-  }
-}
-
-const genericCompactionError = {
-  type: "compaction.failed",
-  message: "Compaction failed before recording an error",
-}
-
-function object(value: unknown): Record<string, unknown> {
-  return isObject(value) ? value : {}
-}
-
-function defined(value: Record<string, unknown>) {
-  return Object.fromEntries(Object.entries(value).filter((entry) => entry[1] !== undefined))
-}

packages/core/src/database/migration/20260709013000_generic_session_input.ts

@@ -1,77 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260709013000_generic_session_input",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`PRAGMA foreign_keys=OFF;`)
-      yield* tx.run(`
-        DELETE FROM \`event\`
-        WHERE \`type\` IN ('session.prompt.admitted.1', 'session.prompt.promoted.1')
-          AND json_extract(\`data\`, '$.inputID') IN (
-            SELECT \`id\` FROM \`session_input\` WHERE \`type\` = 'prompt' AND \`prompt\` IS NULL
-          );
-      `)
-      yield* tx.run(`
-        CREATE TABLE \`__new_session_input\` (
-          \`id\` text PRIMARY KEY,
-          \`session_id\` text NOT NULL,
-          \`type\` text NOT NULL,
-          \`data\` text NOT NULL,
-          \`delivery\` text,
-          \`admitted_seq\` integer NOT NULL,
-          \`promoted_seq\` integer,
-          \`time_created\` integer NOT NULL,
-          CONSTRAINT \`fk_session_input_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      yield* tx.run(`
-        INSERT INTO \`__new_session_input\`(
-          \`id\`, \`session_id\`, \`type\`, \`data\`, \`delivery\`, \`admitted_seq\`, \`promoted_seq\`, \`time_created\`
-        )
-        SELECT
-          \`id\`, \`session_id\`, CASE WHEN \`type\` = 'prompt' THEN 'user' ELSE \`type\` END,
-          CASE WHEN \`type\` = 'prompt' THEN \`prompt\` ELSE '{}' END,
-          \`delivery\`, \`admitted_seq\`, \`promoted_seq\`, \`time_created\`
-        FROM \`session_input\`
-        WHERE \`type\` != 'prompt' OR \`prompt\` IS NOT NULL;
-      `)
-      yield* tx.run(`DROP TABLE \`session_input\`;`)
-      yield* tx.run(`ALTER TABLE \`__new_session_input\` RENAME TO \`session_input\`;`)
-      yield* tx.run(`PRAGMA foreign_keys=ON;`)
-      yield* tx.run(
-        `CREATE INDEX \`session_input_session_pending_delivery_seq_idx\` ON \`session_input\` (\`session_id\`,\`promoted_seq\`,\`delivery\`,\`admitted_seq\`);`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_input_session_pending_compaction_idx\` ON \`session_input\` (\`session_id\`) WHERE \`type\` = 'compaction' and \`promoted_seq\` is null;`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_input_session_admitted_seq_idx\` ON \`session_input\` (\`session_id\`,\`admitted_seq\`);`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_input_session_promoted_seq_idx\` ON \`session_input\` (\`session_id\`,\`promoted_seq\`);`,
-      )
-      yield* tx.run(`
-        UPDATE \`event\`
-        SET
-          \`type\` = 'session.input.admitted.1',
-          \`data\` = json_object(
-            'sessionID', json_extract(\`data\`, '$.sessionID'),
-            'inputID', json_extract(\`data\`, '$.inputID'),
-            'input', json_object(
-              'type', 'user',
-              'data', json_extract(\`data\`, '$.prompt'),
-              'delivery', json_extract(\`data\`, '$.delivery')
-            )
-          )
-        WHERE \`type\` = 'session.prompt.admitted.1';
-      `)
-      yield* tx.run(`
-        UPDATE \`event\`
-        SET \`type\` = 'session.input.promoted.1'
-        WHERE \`type\` = 'session.prompt.promoted.1';
-      `)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260709025533_drop-todo.ts

@@ -1,12 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260709025533_drop-todo",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`DROP INDEX IF EXISTS \`todo_session_idx\`;`)
-      yield* tx.run(`DROP TABLE \`todo\`;`)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260709163752_time_suspended.ts

@@ -1,14 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260709163752_time_suspended",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`session\` ADD \`time_suspended\` integer;`)
-      yield* tx.run(
-        `CREATE INDEX \`session_time_suspended_idx\` ON \`session\` (\`time_suspended\`) WHERE "session"."time_suspended" is not null;`,
-      )
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260709190621_session_pending_table.ts

@@ -1,35 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260709190621_session_pending_table",
-  up(tx) {
-    return Effect.gen(function* () {
-      // Beta reset: session_input becomes the pending-only session_pending
-      // table. Dropping the old table discards consumed ledger rows and any
-      // in-flight pending work along with every historical index variant.
-      yield* tx.run(`DROP TABLE \`session_input\`;`)
-      yield* tx.run(`
-        CREATE TABLE \`session_pending\` (
-          \`id\` text PRIMARY KEY,
-          \`session_id\` text NOT NULL,
-          \`type\` text NOT NULL,
-          \`data\` text NOT NULL,
-          \`delivery\` text,
-          \`admitted_seq\` integer NOT NULL,
-          \`time_created\` integer NOT NULL,
-          CONSTRAINT \`fk_session_pending_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      yield* tx.run(
-        `CREATE INDEX \`session_pending_session_delivery_seq_idx\` ON \`session_pending\` (\`session_id\`,\`delivery\`,\`admitted_seq\`);`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_pending_session_compaction_idx\` ON \`session_pending\` (\`session_id\`) WHERE "session_pending"."type" = 'compaction';`,
-      )
-      yield* tx.run(
-        `CREATE UNIQUE INDEX \`session_pending_session_admitted_seq_idx\` ON \`session_pending\` (\`session_id\`,\`admitted_seq\`);`,
-      )
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260710025429_instruction_sync.ts

@@ -1,86 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260710025429_instruction_sync",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`session\` ADD \`fork_seq\` integer;`)
-      yield* tx.run(`PRAGMA foreign_keys=OFF;`)
-      yield* tx.run(`
-        CREATE TABLE \`__new_instruction_entry\` (
-          \`session_id\` text NOT NULL,
-          \`key\` text NOT NULL,
-          \`value\` text,
-          \`removed\` integer DEFAULT false NOT NULL,
-          \`time_created\` integer NOT NULL,
-          \`time_updated\` integer NOT NULL,
-          CONSTRAINT \`instruction_entry_pk\` PRIMARY KEY(\`session_id\`, \`key\`),
-          CONSTRAINT \`fk_instruction_entry_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      yield* tx.run(`
-        INSERT INTO \`__new_instruction_entry\`(
-          \`session_id\`, \`key\`, \`value\`, \`removed\`, \`time_created\`, \`time_updated\`
-        )
-        SELECT \`session_id\`, \`key\`, \`value\`, false, \`time_created\`, \`time_updated\`
-        FROM \`instruction_entry\`;
-      `)
-      yield* tx.run(`DROP TABLE \`instruction_entry\`;`)
-      yield* tx.run(`ALTER TABLE \`__new_instruction_entry\` RENAME TO \`instruction_entry\`;`)
-      yield* tx.run(`PRAGMA foreign_keys=ON;`)
-      yield* tx.run(`
-        CREATE TABLE \`instruction_blob\` (
-          \`hash\` text PRIMARY KEY,
-          \`value\` text
-        );
-      `)
-      yield* tx.run(`
-        CREATE TABLE \`instruction_state\` (
-          \`session_id\` text PRIMARY KEY,
-          \`epoch_start\` integer NOT NULL,
-          \`through_seq\` integer NOT NULL,
-          \`initial_values\` text NOT NULL,
-          \`current_values\` text NOT NULL,
-          CONSTRAINT \`fk_instruction_state_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      // Persisted System rows were exclusively pre-beta instruction prose,
-      // including fork copies whose message IDs no longer match the source event.
-      yield* tx.run(`DELETE FROM \`session_message\` WHERE \`type\` = 'system';`)
-      yield* tx.run(`
-        UPDATE \`session\`
-        SET \`fork_seq\` = COALESCE(
-          (
-            SELECT MIN(\`seq\`) - 1
-            FROM \`event\`
-            WHERE \`aggregate_id\` = \`session\`.\`id\` AND \`seq\` > 0
-          ),
-          (
-            SELECT \`seq\`
-            FROM \`event_sequence\`
-            WHERE \`aggregate_id\` = \`session\`.\`id\`
-          ),
-          0
-        )
-        WHERE \`fork_session_id\` IS NOT NULL;
-      `)
-      yield* tx.run(`
-        UPDATE \`event\`
-        SET
-          \`type\` = 'session.forked.2',
-          \`data\` = json_set(
-            \`data\`,
-            '$.parentSeq',
-            COALESCE(
-              (SELECT \`fork_seq\` FROM \`session\` WHERE \`id\` = \`event\`.\`aggregate_id\`),
-              0
-            )
-          )
-        WHERE \`type\` = 'session.forked.1';
-      `)
-      yield* tx.run(`DELETE FROM \`event\` WHERE \`type\` = 'session.instructions.updated.1';`)
-      yield* tx.run(`DROP TABLE \`instruction_checkpoint\`;`)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260716020354_kv.ts

@@ -1,18 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260716020354_kv",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`
-        CREATE TABLE \`kv\` (
-          \`key\` text PRIMARY KEY,
-          \`value\` text NOT NULL,
-          \`time_created\` integer NOT NULL,
-          \`time_updated\` integer NOT NULL
-        );
-      `)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260722011141_delete_tool_progress_events.ts

@@ -1,11 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260722011141_delete_tool_progress_events",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`DELETE FROM \`event\` WHERE \`type\` = 'session.tool.progress.1';`)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260722170000_canonical_tool_results.ts

@@ -1,123 +0,0 @@
-import { sql } from "drizzle-orm"
-import { Effect, Schema } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-const decodeJson = Schema.decodeUnknownOption(Schema.UnknownFromJsonString)
-const isObject = Schema.is(Schema.Record(Schema.String, Schema.Unknown))
-const isJsonObject = Schema.is(Schema.Record(Schema.String, Schema.Json))
-
-const object = (value: unknown): Record<string, unknown> => (isObject(value) ? value : {})
-
-const stringify = (value: unknown) => {
-  try {
-    return JSON.stringify(value, null, 2) ?? String(value)
-  } catch {
-    return String(value)
-  }
-}
-
-const contentOf = (state: Record<string, unknown>) => (Array.isArray(state.content) ? state.content : [])
-const resultOf = (state: Record<string, unknown>) =>
-  isObject(state.result) && "value" in state.result ? state.result.value : state.result
-const metadataOf = (state: Record<string, unknown>) => {
-  if (isJsonObject(state.structured) && Object.keys(state.structured).length > 0)
-    return { metadata: state.structured }
-  return isJsonObject(state.metadata) ? { metadata: state.metadata } : {}
-}
-const completedContent = (state: Record<string, unknown>) => {
-  const preserved = contentOf(state)
-  if (preserved.length > 0) return preserved
-  return [{ type: "text", text: stringify(Object.keys(object(state.structured)).length ? state.structured : resultOf(state)) }]
-}
-
-/**
- * One-time rewrite of projected tool rows into the canonical result shape:
- * terminal states store model content plus optional metadata; the generic
- * `structured` and `result` fields disappear. Provider-hosted result payloads
- * move into provider-owned result state so hosted continuation survives.
- * Pre-release durable event versions are intentionally left untouched.
- */
-export default {
-  id: "20260722170000_canonical_tool_results",
-  up(tx) {
-    return Effect.gen(function* () {
-      // Keyset-paginated batches keep memory bounded: production databases hold
-      // gigabytes of assistant rows, and materializing them all at once was
-      // measured at a ~5GB RSS spike.
-      let cursor = ""
-      while (true) {
-        const messages = yield* tx.all<{ id: string; data: string }>(
-          sql`SELECT id, data FROM session_message WHERE type = 'assistant' AND id > ${cursor} ORDER BY id LIMIT 1000`,
-        )
-        if (messages.length === 0) break
-        cursor = messages[messages.length - 1].id
-        yield* rewrite(tx, messages)
-      }
-    })
-  },
-} satisfies DatabaseMigration.Migration
-
-function rewrite(tx: Parameters<DatabaseMigration.Migration["up"]>[0], messages: { id: string; data: string }[]) {
-  return Effect.gen(function* () {
-    for (const row of messages) {
-      // A row that never decoded is skipped rather than failing the whole
-      // migration on every startup; it was equally unreadable before.
-      const decoded = decodeJson(row.data)
-      if (decoded._tag === "None") {
-        yield* Effect.logWarning("skipping undecodable session_message row").pipe(Effect.annotateLogs({ id: row.id }))
-        continue
-      }
-      const data = object(decoded.value)
-      if (!Array.isArray(data.content)) continue
-      let changed = false
-      const content = data.content.map((part) => {
-        const tool = object(part)
-        if (tool.type !== "tool" || !isObject(tool.state)) return part
-        const state = tool.state
-        if (state.status !== "completed" && state.status !== "error" && state.status !== "running") return part
-        if (!("structured" in state) && !("result" in state)) return part
-        changed = true
-        if (state.status === "running")
-          return {
-            ...tool,
-            state: {
-              status: "running",
-              input: object(state.input),
-              metadata: object(state.structured),
-            },
-          }
-        // Hosted payloads are irreducible provider replay state; keep them under
-        // the provider-owned result state instead of a generic result field.
-        const hosted =
-          tool.executed === true && isObject(state.result) && "value" in state.result
-            ? { providerResultState: { ...object(tool.providerResultState), result: state.result.value } }
-            : {}
-        const preserved = contentOf(state)
-        if (state.status === "completed")
-          return {
-            ...tool,
-            ...hosted,
-            state: {
-              status: "completed",
-              input: object(state.input),
-              content: completedContent(state),
-              ...metadataOf(state),
-            },
-          }
-        return {
-          ...tool,
-          ...hosted,
-          state: {
-            status: "error",
-            input: object(state.input),
-            error: state.error,
-            ...(preserved.length > 0 ? { content: preserved } : {}),
-            ...metadataOf(state),
-          },
-        }
-      })
-      if (!changed) continue
-      yield* tx.run(sql`UPDATE session_message SET data = ${JSON.stringify({ ...data, content })} WHERE id = ${row.id}`)
-    }
-  })
-}

packages/core/src/database/migration/20260729022634_session_fork_boundary.ts

@@ -1,13 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260729022634_session_fork_boundary",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`session\` ADD \`fork_boundary\` text;`)
-      yield* tx.run(`ALTER TABLE \`session\` DROP COLUMN \`fork_message_id\`;`)
-      yield* tx.run(`ALTER TABLE \`session\` DROP COLUMN \`fork_seq\`;`)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260730195856_optional_session_title.ts

@@ -1,14 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260730195856_optional_session_title",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`session\` RENAME COLUMN \`title\` TO \`title_old\``)
-      yield* tx.run(`ALTER TABLE \`session\` ADD COLUMN \`title\` text`)
-      yield* tx.run(`UPDATE \`session\` SET \`title\` = \`title_old\``)
-      yield* tx.run(`ALTER TABLE \`session\` DROP COLUMN \`title_old\``)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/migration/20260804233008_loose_psylocke.ts

@@ -0,0 +1,138 @@
+import { Effect } from "effect"
+import type { DatabaseMigration } from "../migration"
+
+export default {
+  id: "20260804233008_loose_psylocke",
+  up(tx) {
+    return Effect.gen(function* () {
+      yield* tx.run(`
+        CREATE TABLE IF NOT EXISTS \`kv\` (
+          \`key\` text PRIMARY KEY,
+          \`value\` text NOT NULL,
+          \`time_created\` integer NOT NULL,
+          \`time_updated\` integer NOT NULL
+        );
+      `)
+      yield* tx.run(`
+        CREATE TABLE IF NOT EXISTS \`instruction_blob\` (
+          \`hash\` text PRIMARY KEY,
+          \`value\` text
+        );
+      `)
+      yield* tx.run(`
+        CREATE TABLE IF NOT EXISTS \`instruction_entry\` (
+          \`session_id\` text NOT NULL,
+          \`key\` text NOT NULL,
+          \`value\` text,
+          \`removed\` integer DEFAULT false NOT NULL,
+          \`time_created\` integer NOT NULL,
+          \`time_updated\` integer NOT NULL,
+          CONSTRAINT \`instruction_entry_pk\` PRIMARY KEY(\`session_id\`, \`key\`),
+          CONSTRAINT \`fk_instruction_entry_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
+        );
+      `)
+      yield* tx.run(`
+        CREATE TABLE IF NOT EXISTS \`instruction_state\` (
+          \`session_id\` text PRIMARY KEY,
+          \`epoch_start\` integer NOT NULL,
+          \`through_seq\` integer NOT NULL,
+          \`initial_values\` text NOT NULL,
+          \`current_values\` text NOT NULL,
+          CONSTRAINT \`fk_instruction_state_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
+        );
+      `)
+      yield* tx.run(`
+        CREATE TABLE IF NOT EXISTS \`session_pending\` (
+          \`id\` text PRIMARY KEY,
+          \`session_id\` text NOT NULL,
+          \`type\` text NOT NULL,
+          \`data\` text NOT NULL,
+          \`delivery\` text,
+          \`admitted_seq\` integer NOT NULL,
+          \`time_created\` integer NOT NULL,
+          CONSTRAINT \`fk_session_pending_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
+        );
+      `)
+      yield* tx.run(`
+        CREATE TABLE IF NOT EXISTS \`session_v2\` (
+          \`id\` text PRIMARY KEY,
+          \`project_id\` text NOT NULL,
+          \`workspace_id\` text,
+          \`parent_id\` text,
+          \`fork_session_id\` text,
+          \`fork_boundary\` text,
+          \`slug\` text NOT NULL,
+          \`directory\` text NOT NULL,
+          \`path\` text,
+          \`title\` text,
+          \`version\` text NOT NULL,
+          \`share_url\` text,
+          \`summary_additions\` integer,
+          \`summary_deletions\` integer,
+          \`summary_files\` integer,
+          \`summary_diffs\` text,
+          \`metadata\` text,
+          \`cost\` real DEFAULT 0 NOT NULL,
+          \`tokens_input\` integer DEFAULT 0 NOT NULL,
+          \`tokens_output\` integer DEFAULT 0 NOT NULL,
+          \`tokens_reasoning\` integer DEFAULT 0 NOT NULL,
+          \`tokens_cache_read\` integer DEFAULT 0 NOT NULL,
+          \`tokens_cache_write\` integer DEFAULT 0 NOT NULL,
+          \`revert\` text,
+          \`permission\` text,
+          \`agent\` text,
+          \`model\` text,
+          \`time_created\` integer NOT NULL,
+          \`time_updated\` integer NOT NULL,
+          \`time_compacting\` integer,
+          \`time_archived\` integer,
+          \`time_suspended\` integer,
+          CONSTRAINT \`fk_session_v2_project_id_project_id_fk\` FOREIGN KEY (\`project_id\`) REFERENCES \`project\`(\`id\`) ON DELETE CASCADE
+        );
+      `)
+      yield* tx.run(`ALTER TABLE \`event\` ADD \`created\` integer DEFAULT 0 NOT NULL;`)
+      yield* tx.run(`
+        CREATE TABLE IF NOT EXISTS \`__new_session_message\` (
+          \`id\` text PRIMARY KEY,
+          \`session_id\` text NOT NULL,
+          \`type\` text NOT NULL,
+          \`seq\` integer NOT NULL,
+          \`time_created\` integer NOT NULL,
+          \`time_updated\` integer NOT NULL,
+          \`data\` text NOT NULL,
+          CONSTRAINT \`fk_session_message_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
+        );
+      `)
+      yield* tx.run(`DROP TABLE \`session_message\`;`)
+      yield* tx.run(`ALTER TABLE \`__new_session_message\` RENAME TO \`session_message\`;`)
+      yield* tx.run(
+        `CREATE UNIQUE INDEX \`session_message_session_seq_idx\` ON \`session_message\` (\`session_id\`,\`seq\`);`,
+      )
+      yield* tx.run(
+        `CREATE INDEX \`session_message_session_type_seq_idx\` ON \`session_message\` (\`session_id\`,\`type\`,\`seq\`);`,
+      )
+      yield* tx.run(
+        `CREATE INDEX \`session_message_session_time_created_id_idx\` ON \`session_message\` (\`session_id\`,\`time_created\`,\`id\`);`,
+      )
+      yield* tx.run(`CREATE INDEX \`session_message_time_created_idx\` ON \`session_message\` (\`time_created\`);`)
+      yield* tx.run(
+        `CREATE INDEX \`session_pending_session_delivery_seq_idx\` ON \`session_pending\` (\`session_id\`,\`delivery\`,\`admitted_seq\`);`,
+      )
+      yield* tx.run(
+        `CREATE UNIQUE INDEX \`session_pending_session_compaction_idx\` ON \`session_pending\` (\`session_id\`) WHERE "session_pending"."type" = 'compaction';`,
+      )
+      yield* tx.run(
+        `CREATE UNIQUE INDEX \`session_pending_session_admitted_seq_idx\` ON \`session_pending\` (\`session_id\`,\`admitted_seq\`);`,
+      )
+      yield* tx.run(`CREATE INDEX \`session_v2_project_idx\` ON \`session_v2\` (\`project_id\`);`)
+      yield* tx.run(`CREATE INDEX \`session_v2_workspace_idx\` ON \`session_v2\` (\`workspace_id\`);`)
+      yield* tx.run(`CREATE INDEX \`session_v2_parent_idx\` ON \`session_v2\` (\`parent_id\`);`)
+      yield* tx.run(
+        `CREATE INDEX \`session_v2_time_suspended_idx\` ON \`session_v2\` (\`time_suspended\`) WHERE "session_v2"."time_suspended" is not null;`,
+      )
+      yield* tx.run(`DROP TABLE \`data_migration\`;`)
+      yield* tx.run(`DROP TABLE \`session_context_epoch\`;`)
+      yield* tx.run(`DROP TABLE \`session_input\`;`)
+    })
+  },
+} satisfies DatabaseMigration.Migration

packages/core/src/database/schema.gen.ts

@@ -17,12 +17,6 @@ export default {
           CONSTRAINT \`fk_workspace_project_id_project_id_fk\` FOREIGN KEY (\`project_id\`) REFERENCES \`project\`(\`id\`) ON DELETE CASCADE
         );
       `)
-      yield* tx.run(`
-        CREATE TABLE \`data_migration\` (
-          \`name\` text PRIMARY KEY,
-          \`time_completed\` integer NOT NULL
-        );
-      `)
       yield* tx.run(`
         CREATE TABLE \`account_state\` (
           \`id\` integer PRIMARY KEY,
@@ -81,7 +75,7 @@ export default {
           \`id\` text PRIMARY KEY,
           \`aggregate_id\` text NOT NULL,
           \`seq\` integer NOT NULL,
-          \`created\` integer NOT NULL,
+          \`created\` integer DEFAULT 0 NOT NULL,
           \`type\` text NOT NULL,
           \`data\` text NOT NULL,
           CONSTRAINT \`fk_event_aggregate_id_event_sequence_aggregate_id_fk\` FOREIGN KEY (\`aggregate_id\`) REFERENCES \`event_sequence\`(\`aggregate_id\`) ON DELETE CASCADE
@@ -148,7 +142,7 @@ export default {
           \`time_created\` integer NOT NULL,
           \`time_updated\` integer NOT NULL,
           CONSTRAINT \`instruction_entry_pk\` PRIMARY KEY(\`session_id\`, \`key\`),
-          CONSTRAINT \`fk_instruction_entry_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
+          CONSTRAINT \`fk_instruction_entry_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
         );
       `)
       yield* tx.run(`
@@ -158,28 +152,7 @@ export default {
           \`through_seq\` integer NOT NULL,
           \`initial_values\` text NOT NULL,
           \`current_values\` text NOT NULL,
-          CONSTRAINT \`fk_instruction_state_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      yield* tx.run(`
-        CREATE TABLE \`message\` (
-          \`id\` text PRIMARY KEY,
-          \`session_id\` text NOT NULL,
-          \`time_created\` integer NOT NULL,
-          \`time_updated\` integer NOT NULL,
-          \`data\` text NOT NULL,
-          CONSTRAINT \`fk_message_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      yield* tx.run(`
-        CREATE TABLE \`part\` (
-          \`id\` text PRIMARY KEY,
-          \`message_id\` text NOT NULL,
-          \`session_id\` text NOT NULL,
-          \`time_created\` integer NOT NULL,
-          \`time_updated\` integer NOT NULL,
-          \`data\` text NOT NULL,
-          CONSTRAINT \`fk_part_message_id_message_id_fk\` FOREIGN KEY (\`message_id\`) REFERENCES \`message\`(\`id\`) ON DELETE CASCADE
+          CONSTRAINT \`fk_instruction_state_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
         );
       `)
       yield* tx.run(`
@@ -191,7 +164,7 @@ export default {
           \`time_created\` integer NOT NULL,
           \`time_updated\` integer NOT NULL,
           \`data\` text NOT NULL,
-          CONSTRAINT \`fk_session_message_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
+          CONSTRAINT \`fk_session_message_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
         );
       `)
       yield* tx.run(`
@@ -203,11 +176,11 @@ export default {
           \`delivery\` text,
           \`admitted_seq\` integer NOT NULL,
           \`time_created\` integer NOT NULL,
-          CONSTRAINT \`fk_session_pending_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
+          CONSTRAINT \`fk_session_pending_session_id_session_v2_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session_v2\`(\`id\`) ON DELETE CASCADE
         );
       `)
       yield* tx.run(`
-        CREATE TABLE \`session\` (
+        CREATE TABLE \`session_v2\` (
           \`id\` text PRIMARY KEY,
           \`project_id\` text NOT NULL,
           \`workspace_id\` text,
@@ -240,18 +213,7 @@ export default {
           \`time_compacting\` integer,
           \`time_archived\` integer,
           \`time_suspended\` integer,
-          CONSTRAINT \`fk_session_project_id_project_id_fk\` FOREIGN KEY (\`project_id\`) REFERENCES \`project\`(\`id\`) ON DELETE CASCADE
-        );
-      `)
-      yield* tx.run(`
-        CREATE TABLE \`session_share\` (
-          \`session_id\` text PRIMARY KEY,
-          \`id\` text NOT NULL,
-          \`secret\` text NOT NULL,
-          \`url\` text NOT NULL,
-          \`time_created\` integer NOT NULL,
-          \`time_updated\` integer NOT NULL,
-          CONSTRAINT \`fk_session_share_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
+          CONSTRAINT \`fk_session_v2_project_id_project_id_fk\` FOREIGN KEY (\`project_id\`) REFERENCES \`project\`(\`id\`) ON DELETE CASCADE
         );
       `)
       yield* tx.run(`CREATE UNIQUE INDEX \`event_aggregate_seq_idx\` ON \`event\` (\`aggregate_id\`,\`seq\`);`)
@@ -259,11 +221,6 @@ export default {
       yield* tx.run(
         `CREATE UNIQUE INDEX \`permission_project_action_resource_idx\` ON \`permission\` (\`project_id\`,\`action\`,\`resource\`);`,
       )
-      yield* tx.run(
-        `CREATE INDEX \`message_session_time_created_id_idx\` ON \`message\` (\`session_id\`,\`time_created\`,\`id\`);`,
-      )
-      yield* tx.run(`CREATE INDEX \`part_message_id_id_idx\` ON \`part\` (\`message_id\`,\`id\`);`)
-      yield* tx.run(`CREATE INDEX \`part_session_idx\` ON \`part\` (\`session_id\`);`)
       yield* tx.run(
         `CREATE UNIQUE INDEX \`session_message_session_seq_idx\` ON \`session_message\` (\`session_id\`,\`seq\`);`,
       )
@@ -283,11 +240,11 @@ export default {
       yield* tx.run(
         `CREATE UNIQUE INDEX \`session_pending_session_admitted_seq_idx\` ON \`session_pending\` (\`session_id\`,\`admitted_seq\`);`,
       )
-      yield* tx.run(`CREATE INDEX \`session_project_idx\` ON \`session\` (\`project_id\`);`)
-      yield* tx.run(`CREATE INDEX \`session_workspace_idx\` ON \`session\` (\`workspace_id\`);`)
-      yield* tx.run(`CREATE INDEX \`session_parent_idx\` ON \`session\` (\`parent_id\`);`)
+      yield* tx.run(`CREATE INDEX \`session_v2_project_idx\` ON \`session_v2\` (\`project_id\`);`)
+      yield* tx.run(`CREATE INDEX \`session_v2_workspace_idx\` ON \`session_v2\` (\`workspace_id\`);`)
+      yield* tx.run(`CREATE INDEX \`session_v2_parent_idx\` ON \`session_v2\` (\`parent_id\`);`)
       yield* tx.run(
-        `CREATE INDEX \`session_time_suspended_idx\` ON \`session\` (\`time_suspended\`) WHERE "session"."time_suspended" is not null;`,
+        `CREATE INDEX \`session_v2_time_suspended_idx\` ON \`session_v2\` (\`time_suspended\`) WHERE "session_v2"."time_suspended" is not null;`,
       )
     })
   },

packages/core/src/database/v1-migration.ts

@@ -0,0 +1,690 @@
+export * as V1Migration from "./v1-migration"
+
+import { Effect, Option, Schema, Semaphore } from "effect"
+import { Database } from "./database"
+import { SessionMessageTable, SessionTable } from "../session/sql"
+import { SessionV1 } from "@opencode-ai/schema/session-v1"
+import { SessionMessage } from "../session/message"
+import { SessionSchema } from "../session/schema"
+import { KVTable } from "../kv/sql"
+import { EventSequenceTable, EventTable } from "../event/sql"
+import { eq, sql } from "drizzle-orm"
+
+export type SourceMessage = {
+  readonly id: string
+  readonly session_id: string
+  readonly time_created: number
+  readonly time_updated: number
+  readonly data: string
+}
+
+export type SourcePart = {
+  readonly id: string
+  readonly message_id: string
+  readonly session_id: string
+  readonly time_created: number
+  readonly time_updated: number
+  readonly data: string
+}
+
+export type TransformInput = {
+  readonly session: typeof SessionTable.$inferSelect
+  readonly messages: ReadonlyArray<SourceMessage>
+  readonly parts: ReadonlyArray<SourcePart>
+}
+
+export type Warning = {
+  readonly reason: string
+  readonly sessionID: string
+  readonly messageID?: string
+  readonly partID?: string
+  readonly observedType?: string
+}
+
+export type TransformResult = {
+  readonly messages: ReadonlyArray<{
+    readonly id: string
+    readonly session_id: string
+    readonly type: SessionMessage.Type
+    readonly seq: number
+    readonly time_created: number
+    readonly time_updated: number
+    readonly data: Record<string, unknown>
+  }>
+  readonly session: Pick<
+    typeof SessionTable.$inferInsert,
+    | "agent"
+    | "model"
+    | "cost"
+    | "tokens_input"
+    | "tokens_output"
+    | "tokens_reasoning"
+    | "tokens_cache_read"
+    | "tokens_cache_write"
+    | "revert"
+    | "time_compacting"
+  >
+  readonly watermark: number
+  readonly warnings: ReadonlyArray<Warning>
+}
+
+export type Status = {
+  readonly status: "required" | "running" | "completed"
+  readonly completed: number
+  readonly total: number
+}
+
+export type Result = {
+  readonly status: "completed"
+}
+
+const lock = Semaphore.makeUnsafe(1)
+const cursorKey = "migration.v1-v2.session.cursor"
+const completedKey = "migration.v1-v2.completed"
+const decodeJson = Schema.decodeUnknownOption(Schema.UnknownFromJsonString)
+const decodeMessage = Schema.decodeUnknownOption(SessionV1.Info)
+const decodePart = Schema.decodeUnknownOption(SessionV1.Part)
+let running = false
+
+export function transformSession(input: TransformInput): TransformResult {
+  const warnings: Warning[] = []
+  const messages = input.messages
+    .map((row) => {
+      const value = Option.getOrUndefined(decodeJson(row.data))
+      const decoded =
+        value && typeof value === "object"
+          ? Option.getOrUndefined(decodeMessage({ ...value, id: row.id, sessionID: row.session_id }))
+          : undefined
+      if (decoded) return { row, value: decoded }
+      warnings.push({ reason: "invalid-message", sessionID: input.session.id, messageID: row.id })
+      return undefined
+    })
+    .filter((item): item is NonNullable<typeof item> => item !== undefined)
+    .sort((a, b) => a.row.time_created - b.row.time_created || a.row.id.localeCompare(b.row.id))
+  const messageIDs = new Set(input.messages.map((row) => row.id))
+  const parts = input.parts
+    .map((row) => {
+      const value = Option.getOrUndefined(decodeJson(row.data))
+      const observedType = value && typeof value === "object" && "type" in value ? String(value.type) : undefined
+      if (!messageIDs.has(row.message_id)) {
+        warnings.push({
+          reason: "orphan-part",
+          sessionID: input.session.id,
+          messageID: row.message_id,
+          partID: row.id,
+          observedType,
+        })
+        return undefined
+      }
+      const decoded =
+        value && typeof value === "object"
+          ? Option.getOrUndefined(
+              decodePart({ ...value, id: row.id, messageID: row.message_id, sessionID: row.session_id }),
+            )
+          : undefined
+      if (decoded) return { row, value: decoded }
+      warnings.push({
+        reason: "invalid-part",
+        sessionID: input.session.id,
+        messageID: row.message_id,
+        partID: row.id,
+        observedType,
+      })
+      return undefined
+    })
+    .filter((item): item is NonNullable<typeof item> => item !== undefined)
+    .sort((a, b) => a.row.id.localeCompare(b.row.id))
+  const byMessage = Map.groupBy(parts, (item) => item.row.message_id)
+  const paired = new Set<string>()
+  const used = new Set(messages.map((item) => item.row.id))
+  const projected = messages
+    .flatMap((item) => {
+      if (paired.has(item.row.id)) return []
+      const owned = byMessage.get(item.row.id)?.map((part) => part.value) ?? []
+      if (item.value.role === "user") {
+        const compaction = owned.find((part) => part.type === "compaction")
+        if (compaction?.type === "compaction") {
+          const pairedSummary = messages.find(
+            (candidate) =>
+              candidate.value.role === "assistant" &&
+              candidate.value.parentID === item.row.id &&
+              candidate.value.summary,
+          )
+          if (!pairedSummary || pairedSummary.value.role !== "assistant") return []
+          paired.add(pairedSummary.row.id)
+          if (pairedSummary.value.error || pairedSummary.value.time.completed === undefined) return []
+          const summary = pairedSummary
+          const summaryText = (byMessage.get(summary.row.id) ?? [])
+            .map((part) => part.value)
+            .filter((part) => part.type === "text" && part.text.length > 0)
+            .map((part) => (part.type === "text" ? part.text : ""))
+            .join("\n\n")
+          const tailIndex = compaction.tail_start_id
+            ? messages.findIndex((candidate) => candidate.row.id === compaction.tail_start_id)
+            : -1
+          const compactionIndex = messages.findIndex((candidate) => candidate.row.id === item.row.id)
+          const tail = tailIndex < 0 ? [] : messages.slice(tailIndex, compactionIndex)
+          return [
+            row(
+              { ...item.row, time_updated: Math.max(item.row.time_updated, summary.row.time_updated) },
+              {
+                id: item.row.id,
+                type: "compaction",
+                status: "completed",
+                reason: compaction.auto ? "auto" : "manual",
+                summary: summaryText,
+                recent: serializeRecent(tail, byMessage),
+                time: { created: item.row.time_created },
+              },
+            ),
+          ]
+        }
+        const subtasks = owned.filter((part) => part.type === "subtask")
+        const visible = owned.filter((part) => part.type === "text" && !part.ignored)
+        const files = owned.filter((part) => part.type === "file")
+        const agents = owned.filter((part) => part.type === "agent")
+        if (subtasks.length > 0 && visible.length === 0 && files.length === 0 && agents.length === 0) return []
+        const ordinary = visible.filter((part) => part.type === "text" && !part.synthetic)
+        const synthetic = visible.filter((part) => part.type === "text" && part.synthetic)
+        const attachments = files.flatMap((part) => (part.type === "file" ? migrateFile(part) : []))
+        const unavailable = files.flatMap((part) =>
+          part.type === "file" && !part.url.startsWith("data:") ? [unavailableFile(part)] : [],
+        )
+        const text = owned
+          .flatMap((part) => {
+            if (part.type === "text" && !part.ignored && !part.synthetic) return [part.text]
+            if (part.type === "file" && !part.url.startsWith("data:")) return [unavailableFile(part)]
+            return []
+          })
+          .join("\n\n")
+        const agentAttachments = agents.map((part) =>
+          part.type === "agent"
+            ? {
+                name: part.name,
+                ...(part.source
+                  ? { mention: { text: part.source.value, start: part.source.start, end: part.source.end } }
+                  : {}),
+              }
+            : { name: "" },
+        )
+        if (
+          ordinary.length === 0 &&
+          unavailable.length === 0 &&
+          synthetic.length > 0 &&
+          attachments.length === 0 &&
+          agentAttachments.length === 0
+        )
+          return [
+            row(item.row, {
+              id: item.row.id,
+              type: "synthetic",
+              text: synthetic.map((part) => (part.type === "text" ? part.text : "")).join("\n\n"),
+              time: { created: item.row.time_created },
+            }),
+          ]
+        const user = row(item.row, {
+          id: item.row.id,
+          type: "user",
+          text,
+          ...(attachments.length ? { files: attachments } : {}),
+          ...(agentAttachments.length ? { agents: agentAttachments } : {}),
+          time: { created: item.row.time_created },
+        })
+        if (synthetic.length === 0) return [user]
+        return [
+          user,
+          row(item.row, {
+            id: syntheticID(item.row.id, used),
+            type: "synthetic",
+            text: synthetic.map((part) => (part.type === "text" ? part.text : "")).join("\n\n"),
+            time: { created: item.row.time_created },
+          }),
+        ]
+      }
+      if (item.value.role !== "assistant") return []
+      const assistant = item.value
+      const parent = messages.find((candidate) => candidate.row.id === assistant.parentID)
+      const parentParts = parent ? (byMessage.get(parent.row.id)?.map((part) => part.value) ?? []) : []
+      if (
+        parentParts.some((part) => part.type === "subtask") &&
+        owned.some((part) => part.type === "tool" && part.tool === "task")
+      )
+        return []
+      const content = owned.flatMap((part): Array<Record<string, unknown>> => {
+        if (part.type === "text")
+          return [{ type: "text", text: part.text, ...(part.metadata ? { state: part.metadata } : {}) }]
+        if (part.type === "reasoning")
+          return [
+            {
+              type: "reasoning",
+              text: part.text,
+              ...(part.metadata ? { state: part.metadata } : {}),
+              time: { created: part.time.start, ...(part.time.end === undefined ? {} : { completed: part.time.end }) },
+            },
+          ]
+        if (part.type !== "tool") return []
+        return [migrateTool(part, item.row.time_created)]
+      })
+      const start =
+        owned.flatMap((part) => (part.type === "step-start" && part.snapshot ? [part.snapshot] : []))[0] ??
+        owned.flatMap((part) => (part.type === "snapshot" ? [part.snapshot] : []))[0] ??
+        owned.flatMap((part) => (part.type === "patch" ? [part.hash] : []))[0]
+      const end = owned.flatMap((part) => (part.type === "step-finish" && part.snapshot ? [part.snapshot] : [])).at(-1)
+      const snapshotFiles = Array.from(new Set(owned.flatMap((part) => (part.type === "patch" ? part.files : []))))
+      const finish = normalizeFinish(assistant.finish)
+      return [
+        row(item.row, {
+          id: item.row.id,
+          type: "assistant",
+          agent: assistant.agent,
+          model: {
+            providerID: assistant.providerID,
+            id: assistant.modelID,
+            variant: assistant.variant ?? "default",
+          },
+          content,
+          ...(start || end || snapshotFiles.length
+            ? {
+                snapshot: {
+                  ...(start ? { start } : {}),
+                  ...(end ? { end } : {}),
+                  ...(snapshotFiles.length ? { files: snapshotFiles } : {}),
+                },
+              }
+            : {}),
+          ...(finish ? { finish } : {}),
+          cost: assistant.cost,
+          tokens: {
+            input: assistant.tokens.input,
+            output: assistant.tokens.output,
+            reasoning: assistant.tokens.reasoning,
+            cache: assistant.tokens.cache,
+          },
+          ...(assistant.error ? { error: migrateError(assistant.error) } : {}),
+          time: {
+            created: item.row.time_created,
+            ...(assistant.time.completed === undefined ? {} : { completed: item.row.time_updated }),
+          },
+        }),
+      ]
+    })
+    .map((item, seq) => ({ ...item, seq }))
+  const assistants = messages
+    .filter((item) => item.value.role === "assistant")
+    .map((item) => item.value)
+    .filter((item): item is SessionV1.Assistant => item.role === "assistant")
+  const latestUser = messages.findLast((item) => {
+    if (item.value.role !== "user") return false
+    const owned = byMessage.get(item.row.id) ?? []
+    if (owned.some((part) => part.value.type === "compaction")) return false
+    return !owned.some((part) => part.value.type === "subtask") || !owned.every((part) => part.value.type === "subtask")
+  })
+  return {
+    messages: projected,
+    session: {
+      agent: input.session.agent ?? (latestUser?.value.role === "user" ? latestUser.value.agent : null),
+      model:
+        input.session.model ??
+        (latestUser?.value.role === "user"
+          ? {
+              id: latestUser.value.model.modelID,
+              providerID: latestUser.value.model.providerID,
+              variant: latestUser.value.model.variant ?? "default",
+            }
+          : null),
+      cost: assistants.reduce((total, item) => total + item.cost, 0),
+      tokens_input: assistants.reduce((total, item) => total + item.tokens.input, 0),
+      tokens_output: assistants.reduce((total, item) => total + item.tokens.output, 0),
+      tokens_reasoning: assistants.reduce((total, item) => total + item.tokens.reasoning, 0),
+      tokens_cache_read: assistants.reduce((total, item) => total + item.tokens.cache.read, 0),
+      tokens_cache_write: assistants.reduce((total, item) => total + item.tokens.cache.write, 0),
+      revert: null,
+      time_compacting: null,
+    },
+    watermark: projected.length - 1,
+    warnings,
+  }
+}
+
+export function status(): Effect.Effect<Status, never, Database.Service> {
+  return Effect.gen(function* () {
+    const { db } = yield* Database.Service
+    if (!(yield* hasLegacySessions(db))) return { status: "completed" as const, completed: 0, total: 0 }
+    const completed =
+      (yield* db
+        .select({ value: KVTable.value })
+        .from(KVTable)
+        .where(eq(KVTable.key, completedKey))
+        .get()
+        .pipe(Effect.orDie)) !== undefined
+    const cursor = yield* db
+      .select({ value: KVTable.value })
+      .from(KVTable)
+      .where(eq(KVTable.key, cursorKey))
+      .get()
+      .pipe(Effect.orDie)
+    const total = (yield* db.get<{ value: number }>(sql`SELECT COUNT(*) AS value FROM session`))?.value ?? 0
+    const cursorValue = typeof cursor?.value === "string" ? cursor.value : undefined
+    const migrated =
+      cursorValue !== undefined
+        ? ((yield* db.get<{ value: number }>(sql`SELECT COUNT(*) AS value FROM session WHERE id >= ${cursorValue}`))
+            ?.value ?? 0)
+        : 0
+    return {
+      status: completed ? ("completed" as const) : running ? ("running" as const) : ("required" as const),
+      completed: completed ? total : migrated,
+      total,
+    }
+  }).pipe(Effect.orDie)
+}
+
+export function run(): Effect.Effect<Result, never, Database.Service> {
+  return lock.withPermit(
+    Effect.gen(function* () {
+      const { db } = yield* Database.Service
+      if (yield* hasKey(db, completedKey)) return { status: "completed" as const }
+      if (!(yield* hasLegacySessions(db))) return { status: "completed" as const }
+      running = true
+      const migrate = Effect.gen(function* () {
+        while (true) {
+          const cursor = yield* db
+            .select({ value: KVTable.value })
+            .from(KVTable)
+            .where(eq(KVTable.key, cursorKey))
+            .get()
+            .pipe(Effect.orDie)
+          const cursorValue = typeof cursor?.value === "string" ? cursor.value : undefined
+          const nextID = yield* db.get<{ id: string }>(
+            cursorValue === undefined
+              ? sql`SELECT id FROM session ORDER BY id DESC LIMIT 1`
+              : sql`SELECT id FROM session WHERE id < ${cursorValue} ORDER BY id DESC LIMIT 1`,
+          )
+          if (!nextID) break
+          yield* db
+            .transaction((tx) =>
+              Effect.gen(function* () {
+                yield* tx.run(sql`
+                  INSERT OR IGNORE INTO session_v2 (
+                    id, project_id, workspace_id, parent_id, slug, directory, path, title, version, share_url,
+                    summary_additions, summary_deletions, summary_files, summary_diffs, metadata, cost,
+                    tokens_input, tokens_output, tokens_reasoning, tokens_cache_read, tokens_cache_write,
+                    revert, permission, agent, model, time_created, time_updated, time_compacting, time_archived
+                  )
+                  SELECT
+                    id, project_id, workspace_id, parent_id, slug, directory, path, title, version, share_url,
+                    summary_additions, summary_deletions, summary_files, summary_diffs, metadata, cost,
+                    tokens_input, tokens_output, tokens_reasoning, tokens_cache_read, tokens_cache_write,
+                    revert, permission, agent, model, time_created, time_updated, time_compacting, time_archived
+                  FROM session
+                  WHERE id = ${nextID.id}
+                `)
+                const next = yield* tx
+                  .select()
+                  .from(SessionTable)
+                  .where(eq(SessionTable.id, SessionSchema.ID.make(nextID.id)))
+                  .get()
+                if (!next) return yield* Effect.die(new Error(`Failed to copy V1 session ${nextID.id}`))
+                const sourceMessages = yield* tx.all<SourceMessage>(
+                  sql`SELECT id, session_id, time_created, time_updated, data FROM message WHERE session_id = ${next.id}`,
+                )
+                const sourceParts = yield* tx.all<SourcePart>(
+                  sql`SELECT id, message_id, session_id, time_created, time_updated, data FROM part WHERE session_id = ${next.id}`,
+                )
+                const transformed = transformSession({ session: next, messages: sourceMessages, parts: sourceParts })
+                yield* Effect.forEach(transformed.warnings, (warning) =>
+                  Effect.logWarning("Skipped V1 migration row", warning),
+                )
+                yield* tx.delete(EventTable).where(eq(EventTable.aggregate_id, next.id)).run()
+                yield* tx.delete(SessionMessageTable).where(eq(SessionMessageTable.session_id, next.id)).run()
+                yield* Effect.forEach(transformed.messages, (message) =>
+                  tx.run(sql`
+                    INSERT INTO session_message (id, session_id, type, seq, time_created, time_updated, data)
+                    VALUES (${message.id}, ${message.session_id}, ${message.type}, ${message.seq}, ${message.time_created}, ${message.time_updated}, ${JSON.stringify(message.data)})
+                  `),
+                )
+                yield* tx
+                  .update(SessionTable)
+                  .set({ ...transformed.session, time_updated: next.time_updated })
+                  .where(eq(SessionTable.id, next.id))
+                  .run()
+                yield* tx
+                  .insert(EventSequenceTable)
+                  .values({ aggregate_id: next.id, seq: transformed.watermark })
+                  .onConflictDoUpdate({
+                    target: EventSequenceTable.aggregate_id,
+                    set: { seq: transformed.watermark, owner_id: null },
+                  })
+                  .run()
+                yield* tx
+                  .insert(KVTable)
+                  .values({ key: cursorKey, value: next.id })
+                  .onConflictDoUpdate({ target: KVTable.key, set: { value: next.id, time_updated: Date.now() } })
+                  .run()
+              }),
+            )
+            .pipe(Effect.orDie)
+          yield* Effect.yieldNow
+        }
+        yield* db
+          .transaction((tx) =>
+            Effect.gen(function* () {
+              yield* tx
+                .insert(KVTable)
+                .values({ key: completedKey, value: true })
+                .onConflictDoUpdate({ target: KVTable.key, set: { value: true, time_updated: Date.now() } })
+                .run()
+              yield* tx.delete(KVTable).where(eq(KVTable.key, cursorKey)).run()
+            }),
+          )
+          .pipe(Effect.orDie)
+        return { status: "completed" as const }
+      })
+      return yield* migrate.pipe(
+        Effect.ensuring(
+          Effect.sync(() => {
+            running = false
+          }),
+        ),
+      )
+    }).pipe(Effect.orDie),
+  )
+}
+
+function row(
+  source: SourceMessage,
+  message: {
+    readonly id: string
+    readonly type: SessionMessage.Type
+    readonly time: { readonly created: number }
+    readonly [key: string]: unknown
+  },
+): TransformResult["messages"][number] {
+  const { id, type, ...data } = message
+  return {
+    id,
+    session_id: source.session_id,
+    type,
+    seq: 0,
+    time_created: source.time_created,
+    time_updated: source.time_updated,
+    data,
+  }
+}
+
+function migrateTool(part: typeof SessionV1.ToolPart.Type, fallback: number) {
+  const base = {
+    type: "tool" as const,
+    id: part.callID,
+    name: part.tool,
+    ...(part.metadata ? { providerState: part.metadata } : {}),
+  }
+  if (part.state.status === "completed")
+    return {
+      ...base,
+      state: {
+        status: "completed",
+        input: part.state.input,
+        content:
+          part.state.time.compacted === undefined
+            ? [
+                { type: "text", text: part.state.output },
+                ...(part.state.attachments ?? []).map((file) => ({
+                  type: "file" as const,
+                  uri: file.url,
+                  mime: file.mime,
+                  ...(file.filename ? { name: file.filename } : {}),
+                })),
+              ]
+            : [{ type: "text", text: "[Old tool result content cleared]" }],
+        metadata: part.state.metadata,
+      },
+      time: { created: part.state.time.start, completed: part.state.time.end },
+    }
+  if (part.state.status === "error")
+    return {
+      ...base,
+      state: {
+        status: "error",
+        input: part.state.input,
+        error: { type: "tool.execution", message: part.state.error },
+        ...(typeof part.state.metadata?.output === "string"
+          ? { content: [{ type: "text", text: part.state.metadata.output }] }
+          : {}),
+        ...(part.state.metadata ? { metadata: part.state.metadata } : {}),
+      },
+      time: { created: part.state.time.start, completed: part.state.time.end },
+    }
+  return {
+    ...base,
+    state: {
+      status: "error",
+      input: part.state.input,
+      error: { type: "tool.interrupted", message: "Tool execution was interrupted before V2 migration" },
+      ...(part.state.status === "running" && part.state.metadata ? { metadata: part.state.metadata } : {}),
+    },
+    time: { created: part.state.status === "running" ? part.state.time.start : fallback },
+  }
+}
+
+function migrateError(error: NonNullable<(typeof SessionV1.Assistant.Type)["error"]>) {
+  const message =
+    "message" in error.data
+      ? error.data.message
+      : error.name === "MessageOutputLengthError"
+        ? "The model exceeded its output limit"
+        : error.name
+  const type =
+    error.name === "ProviderAuthError"
+      ? "provider.auth"
+      : error.name === "ContentFilterError"
+        ? "provider.content-filter"
+        : error.name === "ContextOverflowError"
+          ? "provider.invalid-request"
+          : error.name === "StructuredOutputError" || error.name === "MessageOutputLengthError"
+            ? "provider.invalid-output"
+            : error.name === "MessageAbortedError"
+              ? "aborted"
+              : error.name === "APIError"
+                ? "provider.error"
+                : "unknown"
+  return { type, message }
+}
+
+function normalizeFinish(finish: string | undefined) {
+  if (!finish) return undefined
+  return (
+    (["stop", "length", "tool-calls", "content-filter", "error", "unknown"] as const).find(
+      (value) => value === finish,
+    ) ?? "unknown"
+  )
+}
+
+function migrateFile(part: SessionV1.FilePart) {
+  if (!part.url.startsWith("data:")) return []
+  const comma = part.url.indexOf(",")
+  if (comma < 0) return []
+  const header = part.url.slice(0, comma)
+  const payload = part.url.slice(comma + 1)
+  const data = header.endsWith(";base64")
+    ? Buffer.from(payload, "base64").toString("base64")
+    : Buffer.from(decodeURIComponent(payload)).toString("base64")
+  return [
+    {
+      data,
+      mime: part.mime,
+      source:
+        part.source?.type === "resource" ? { type: "uri" as const, uri: part.source.uri } : { type: "inline" as const },
+      ...(part.filename ? { name: part.filename } : {}),
+      ...(part.source
+        ? { mention: { text: part.source.text.value, start: part.source.text.start, end: part.source.text.end } }
+        : {}),
+    },
+  ]
+}
+
+function unavailableFile(part: SessionV1.FilePart) {
+  const label = part.filename ?? (part.source?.type === "resource" ? part.source.uri : part.url)
+  return `[Attachment unavailable after migration: ${label} (${part.mime})]`
+}
+
+function syntheticID(source: string, used: Set<string>) {
+  const prefix = source.slice(0, 16)
+  const alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+  for (let salt = 0; ; salt++) {
+    const hex = new Bun.CryptoHasher("sha256").update(`v1-synthetic:${source}${salt ? `:${salt}` : ""}`).digest("hex")
+    let value = BigInt(`0x${hex}`)
+    let suffix = ""
+    while (suffix.length < 14) {
+      suffix = alphabet[Number(value % 62n)] + suffix
+      value /= 62n
+    }
+    const id = prefix + suffix
+    if (used.has(id)) continue
+    used.add(id)
+    return id
+  }
+}
+
+function serializeRecent(
+  messages: ReadonlyArray<{ row: SourceMessage; value: typeof SessionV1.Info.Type }>,
+  parts: Map<string, Array<{ row: SourcePart; value: typeof SessionV1.Part.Type }>>,
+) {
+  return messages
+    .flatMap((message) => {
+      const owned = parts.get(message.row.id)?.map((part) => part.value) ?? []
+      if (message.value.role === "user")
+        return [
+          `[User]: ${owned
+            .filter((part) => part.type === "text" && !part.ignored)
+            .map((part) => (part.type === "text" ? part.text : ""))
+            .join("\n\n")}`,
+        ]
+      return owned.flatMap((part) =>
+        part.type === "text"
+          ? [`[Assistant]: ${part.text}`]
+          : part.type === "reasoning" && part.text
+            ? [`[Assistant reasoning]: ${part.text}`]
+            : [],
+      )
+    })
+    .join("\n\n")
+}
+
+function hasKey(db: Database.Interface["db"], key: string) {
+  return db
+    .select({ key: KVTable.key })
+    .from(KVTable)
+    .where(eq(KVTable.key, key))
+    .get()
+    .pipe(
+      Effect.map((row) => row !== undefined),
+      Effect.orDie,
+    )
+}
+
+function hasLegacySessions(db: Database.Interface["db"]) {
+  return db.get(sql`SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'session'`).pipe(
+    Effect.map((row) => row !== undefined),
+    Effect.orDie,
+  )
+}

packages/core/src/event/sql.ts

@@ -15,7 +15,7 @@ export const EventTable = sqliteTable(
       .notNull()
       .references(() => EventSequenceTable.aggregate_id, { onDelete: "cascade" }),
     seq: integer().notNull(),
-    created: integer().notNull(),
+    created: integer().notNull().default(0),
     type: text().notNull(),
     data: text({ mode: "json" }).$type<Record<string, unknown>>().notNull(),
   },

packages/core/src/session.ts

@@ -18,7 +18,6 @@ import { SessionMessageTable, SessionTable } from "./session/sql"
 import { SessionSchema } from "./session/schema"
 import { AbsolutePath, PositiveInt, RelativePath } from "./schema"
 import { Agent } from "./agent"
-import { SessionV1 } from "./v1/session"
 import { Money } from "@opencode-ai/schema/money"
 import { App } from "./app"
 import { Slug } from "./util/slug"
@@ -221,14 +220,8 @@ export interface Interface {
     after?: number
     follow?: boolean
   }) => Stream.Stream<SessionEvent.DurableEvent | EventLog.Synced, NotFoundError>
-  readonly switchAgent: (input: {
-    sessionID: SessionSchema.ID
-    agent: Agent.ID
-  }) => Effect.Effect<void, NotFoundError>
-  readonly switchModel: (input: {
-    sessionID: SessionSchema.ID
-    model: Model.Ref
-  }) => Effect.Effect<void, NotFoundError>
+  readonly switchAgent: (input: { sessionID: SessionSchema.ID; agent: Agent.ID }) => Effect.Effect<void, NotFoundError>
+  readonly switchModel: (input: { sessionID: SessionSchema.ID; model: Model.Ref }) => Effect.Effect<void, NotFoundError>
   readonly rename: (input: { sessionID: SessionSchema.ID; title: string }) => Effect.Effect<void, NotFoundError>
   readonly move: (input: {
     sessionID: SessionSchema.ID
@@ -364,45 +357,45 @@ const layer = Layer.effect(
           return yield* Effect.die(new Error("Session.create requires either location or an existing parentID"))
         const project = yield* projects.resolve(location.directory)
         yield* persistProject(project)
-        const now = Date.now()
-        const info = SessionV1.SessionInfo.make({
-          id: sessionID,
-          slug: Slug.create(),
-          version: app.version,
-          projectID: project.id,
-          parentID: input.parentID,
-          directory: location.directory,
-          path: path.relative(project.directory, location.directory).replaceAll("\\", "/"),
-          workspaceID: location.workspaceID ? Workspace.ID.make(location.workspaceID) : undefined,
-          title: input.title,
-          agent: input.agent,
-          model: input.model
-            ? {
-                id: Model.ID.make(input.model.id),
-                providerID: input.model.providerID,
-                variant: input.model.variant,
+        const projected = yield* bus
+          .publish(
+            SessionEvent.Created,
+            {
+              sessionID,
+              slug: Slug.create(),
+              version: app.version,
+              projectID: project.id,
+              parentID: input.parentID,
+              location,
+              subpath: RelativePath.make(path.relative(project.directory, location.directory).replaceAll("\\", "/")),
+              title: input.title,
+              agent: input.agent,
+              model: input.model
+                ? {
+                    id: Model.ID.make(input.model.id),
+                    providerID: input.model.providerID,
+                    variant: input.model.variant,
+                  }
+                : undefined,
+            },
+            { location },
+          )
+          .pipe(
+            Effect.as({ type: "created" } as const),
+            Effect.catchDefect((defect) => {
+              if (!(defect instanceof SessionProjector.SessionAlreadyProjected)) {
+                return Effect.die(defect)
               }
-            : undefined,
-          cost: Money.USD.zero,
-          tokens: { input: 0, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
-          time: { created: now, updated: now },
-        })
-        const projected = yield* bus.publish(SessionV1.Event.Created, { sessionID, info }, { location }).pipe(
-          Effect.as({ type: "created" } as const),
-          Effect.catchDefect((defect) => {
-            if (!(defect instanceof SessionProjector.SessionAlreadyProjected)) {
-              return Effect.die(defect)
-            }
-            // Concurrent creation lost the projection race. The existing Session identity wins.
-            return store
-              .get(sessionID)
-              .pipe(
-                Effect.flatMap((session) =>
-                  session ? Effect.succeed({ type: "existing", session } as const) : Effect.die(defect),
-                ),
-              )
-          }),
-        )
+              // Concurrent creation lost the projection race. The existing Session identity wins.
+              return store
+                .get(sessionID)
+                .pipe(
+                  Effect.flatMap((session) =>
+                    session ? Effect.succeed({ type: "existing", session } as const) : Effect.die(defect),
+                  ),
+                )
+            }),
+          )
         if (projected.type === "existing") return projected.session
         // TODO: Restore recorded sessions onto replacement synchronized workspaces in a future API slice.
         return yield* result.get(sessionID).pipe(Effect.orDie)
@@ -557,8 +550,7 @@ const layer = Layer.effect(
             const session = yield* result.get(input.sessionID)
             // A staged revert must be committed before admitting new input so the prompt
             // continues from the reverted boundary rather than stale post-boundary history.
-            if (session.revert)
-              yield* SessionRevert.commit(session).pipe(Effect.provideService(Bus.Service, bus))
+            if (session.revert) yield* SessionRevert.commit(session).pipe(Effect.provideService(Bus.Service, bus))
             // Resolved lazily so prompt admission only boots location services when an
             // image attachment actually needs the resizer.
             const image = Image.Service.pipe(Effect.provide(locations.get(session.location)))
@@ -738,23 +730,23 @@ const layer = Layer.effect(
         const info = yield* fs.stat(directory).pipe(Effect.catch(() => Effect.succeed(undefined)))
         if (!info) return yield* new DestinationNotFoundError({ directory })
         if (info.type !== "Directory") return yield* new DestinationNotDirectoryError({ directory })
-        if (
-          current.location.directory === directory &&
-          current.location.workspaceID === input.workspaceID
-        )
-          return
+        if (current.location.directory === directory && current.location.workspaceID === input.workspaceID) return
         const project = yield* projects.resolve(directory)
         yield* persistProject(project)
         if ((yield* execution.active).has(input.sessionID)) {
           yield* execution.interrupt(input.sessionID)
           yield* execution.awaitIdle(input.sessionID)
         }
-        yield* bus.publish(SessionEvent.Moved, {
-          sessionID: input.sessionID,
-          location: Location.Ref.make({ directory, workspaceID: input.workspaceID }),
-          projectID: project.id,
-          subpath: RelativePath.make(path.relative(project.directory, directory).replaceAll("\\", "/")),
-        })
+        yield* bus.publish(
+          SessionEvent.Moved,
+          {
+            sessionID: input.sessionID,
+            location: Location.Ref.make({ directory, workspaceID: input.workspaceID }),
+            projectID: project.id,
+            subpath: RelativePath.make(path.relative(project.directory, directory).replaceAll("\\", "/")),
+          },
+          { location: current.location },
+        )
       }),
       compact: Effect.fn("Session.compact")(function* (input) {
         yield* result.get(input.sessionID)
@@ -835,9 +827,7 @@ const layer = Layer.effect(
           }),
         ),
       ),
-      interrupt: Effect.fn("Session.interrupt")((sessionID) =>
-        Effect.uninterruptible(execution.interrupt(sessionID)),
-      ),
+      interrupt: Effect.fn("Session.interrupt")((sessionID) => Effect.uninterruptible(execution.interrupt(sessionID))),
       revert: {
         stage: Effect.fn("Session.revert.stage")(function* (input) {
           const session = yield* result.get(input.sessionID)
@@ -936,12 +926,7 @@ const materializeAttachment = Effect.fn("Session.materializeAttachment")(functio
             .join("\n"),
         )
       : resolved.bytes
-  const normalized = yield* normalizeImageAttachment(
-    input,
-    Buffer.from(content).toString("base64"),
-    mime,
-    image,
-  )
+  const normalized = yield* normalizeImageAttachment(input, Buffer.from(content).toString("base64"), mime, image)
   return FileAttachment.create({
     data: normalized.data,
     mime: normalized.mime,

packages/core/src/session/message-updater.ts

@@ -141,6 +141,7 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
 
   return Effect.gen(function* () {
     yield* SessionEvent.All.match(event, {
+      "session.created": () => Effect.void,
       "session.usage.updated": () => Effect.void,
       "session.usage.recorded": () => Effect.void,
       "session.agent.selected": (event) => {

packages/core/src/session/projector.ts

@@ -7,23 +7,25 @@ import { Bus } from "../bus"
 import { makeGlobalNode } from "@opencode-ai/util/effect/app-node"
 import { Model } from "../model"
 import { SessionEvent } from "./event"
-import { SessionV1 } from "../v1/session"
-import { WorkspaceTable } from "../control-plane/workspace.sql"
 import { SessionMessage } from "./message"
 import { SessionMessageUpdater } from "./message-updater"
 import { SessionPending } from "./pending"
 import { Workspace } from "../workspace"
 import { InstructionState } from "./instruction-state"
-import { MessageTable, PartTable, SessionPendingTable, SessionMessageTable, SessionTable } from "./sql"
-import type { DeepMutable } from "../schema"
+import { SessionPendingTable, SessionMessageTable, SessionTable } from "./sql"
 import { Slug } from "../util/slug"
 import { Money } from "@opencode-ai/schema/money"
+import type { SessionSchema } from "./schema"
+import { WorkspaceTable } from "../control-plane/workspace.sql"
 
 type DatabaseService = Database.Interface["db"]
 type CurrentDurableEvent = Extract<SessionEvent.Event, { readonly durable: object }>
 type MessageEvent = Exclude<
   CurrentDurableEvent,
-  typeof SessionEvent.Forked.Type | typeof SessionEvent.Deleted.Type | typeof SessionEvent.InstructionsUpdated.Type
+  | typeof SessionEvent.Created.Type
+  | typeof SessionEvent.Forked.Type
+  | typeof SessionEvent.Deleted.Type
+  | typeof SessionEvent.InstructionsUpdated.Type
 >
 
 const decodeMessage = Schema.decodeUnknownSync(SessionMessage.Info)
@@ -50,73 +52,7 @@ const forkTitle = (value?: string) => {
   return `${value} (fork #1)`
 }
 
-function usage(part: (typeof SessionV1.Event.PartUpdated.Type)["data"]["part"] | unknown): Usage | undefined {
-  if (typeof part !== "object" || part === null) return undefined
-  const value = part as Record<string, unknown>
-  if (value.type !== "step-finish") return undefined
-  if (!("cost" in value) || !("tokens" in value)) return undefined
-  return { cost: value.cost as Usage["cost"], tokens: value.tokens as Usage["tokens"] }
-}
-
-function sessionRow(info: SessionV1.SessionInfo): typeof SessionTable.$inferInsert {
-  return {
-    id: info.id,
-    project_id: info.projectID,
-    workspace_id: info.workspaceID ?? null,
-    parent_id: info.parentID,
-    slug: info.slug,
-    directory: info.directory,
-    path: info.path,
-    title: info.title,
-    agent: info.agent,
-    model: info.model,
-    version: info.version,
-    share_url: info.share?.url,
-    summary_additions: info.summary?.additions,
-    summary_deletions: info.summary?.deletions,
-    summary_files: info.summary?.files,
-    summary_diffs: info.summary?.diffs ? [...info.summary.diffs] : undefined,
-    metadata: info.metadata,
-    cost: info.cost ?? 0,
-    tokens_input: (info.tokens ?? { input: 0 }).input,
-    tokens_output: (info.tokens ?? { output: 0 }).output,
-    tokens_reasoning: (info.tokens ?? { reasoning: 0 }).reasoning,
-    tokens_cache_read: (info.tokens ?? { cache: { read: 0 } }).cache.read,
-    tokens_cache_write: (info.tokens ?? { cache: { write: 0 } }).cache.write,
-    revert: info.revert
-      ? {
-          messageID: SessionMessage.ID.make(info.revert.messageID),
-          partID: info.revert.partID,
-          snapshot: info.revert.snapshot,
-          diff: info.revert.diff,
-        }
-      : null,
-    permission: info.permission ? [...info.permission] : undefined,
-    time_created: info.time.created,
-    time_updated: info.time.updated,
-    time_compacting: info.time.compacting,
-    time_archived: info.time.archived,
-  }
-}
-
-function messageData(
-  info: (typeof SessionV1.Event.MessageUpdated.Type)["data"]["info"],
-): typeof MessageTable.$inferInsert.data {
-  const { id: _, sessionID: __, ...rest } = info
-  return rest as DeepMutable<typeof rest>
-}
-
-function partData(part: (typeof SessionV1.Event.PartUpdated.Type)["data"]["part"]): typeof PartTable.$inferInsert.data {
-  const { id: _, messageID: __, sessionID: ___, ...rest } = part
-  return rest as DeepMutable<typeof rest>
-}
-
-function applyUsage(
-  db: DatabaseService,
-  sessionID: (typeof SessionV1.Event.MessageUpdated.Type)["data"]["sessionID"],
-  value: Usage,
-  sign = 1,
-) {
+function applyUsage(db: DatabaseService, sessionID: SessionSchema.ID, value: Usage, sign = 1) {
   return db
     .update(SessionTable)
     .set({
@@ -466,34 +402,39 @@ const layer = Layer.effectDiscard(
   Effect.gen(function* () {
     const bus = yield* Bus.Service
     const db = (yield* Database.Service).db
-    yield* bus.project(SessionV1.Event.Created, (event) =>
+    yield* bus.project(SessionEvent.Created, (event) =>
       Effect.gen(function* () {
         const stored = yield* db
           .insert(SessionTable)
-          .values(sessionRow(event.data.info))
+          .values({
+            id: event.data.sessionID,
+            project_id: event.data.projectID,
+            workspace_id: event.data.location.workspaceID ? Workspace.ID.make(event.data.location.workspaceID) : null,
+            parent_id: event.data.parentID,
+            slug: event.data.slug,
+            directory: event.data.location.directory,
+            path: event.data.subpath,
+            title: event.data.title,
+            agent: event.data.agent,
+            model: event.data.model,
+            version: event.data.version,
+            time_created: DateTime.toEpochMillis(event.created),
+            time_updated: DateTime.toEpochMillis(event.created),
+          })
           .onConflictDoNothing()
           .returning({ sessionID: SessionTable.id })
           .get()
           .pipe(Effect.orDie)
         if (!stored) return yield* Effect.die(new SessionAlreadyProjected())
-        if (event.data.info.workspaceID) {
-          yield* db
-            .update(WorkspaceTable)
-            .set({ time_used: Date.now() })
-            .where(eq(WorkspaceTable.id, event.data.info.workspaceID))
-            .run()
-            .pipe(Effect.orDie)
-        }
+        if (!event.data.location.workspaceID) return
+        yield* db
+          .update(WorkspaceTable)
+          .set({ time_used: Date.now() })
+          .where(eq(WorkspaceTable.id, event.data.location.workspaceID))
+          .run()
+          .pipe(Effect.orDie)
       }),
     )
-    yield* bus.project(SessionV1.Event.Updated, (event) =>
-      db
-        .update(SessionTable)
-        .set(sessionRow(event.data.info))
-        .where(eq(SessionTable.id, event.data.sessionID))
-        .run()
-        .pipe(Effect.orDie),
-    )
     yield* bus.project(SessionEvent.Moved, (event) =>
       Effect.gen(function* () {
         yield* db
@@ -511,81 +452,9 @@ const layer = Layer.effectDiscard(
         yield* InstructionState.reset(db, event.data.sessionID)
       }),
     )
-    yield* bus.project(SessionV1.Event.Deleted, (event) =>
-      db.delete(SessionTable).where(eq(SessionTable.id, event.data.sessionID)).run().pipe(Effect.orDie),
-    )
     yield* bus.project(SessionEvent.Deleted, (event) =>
       db.delete(SessionTable).where(eq(SessionTable.id, event.data.sessionID)).run().pipe(Effect.orDie),
     )
-    yield* bus.project(SessionV1.Event.MessageUpdated, (event) =>
-      Effect.gen(function* () {
-        const time_created = event.data.info.time.created
-        const id = event.data.info.id
-        const sessionID = event.data.info.sessionID
-        const data = messageData(event.data.info)
-        yield* db
-          .insert(MessageTable)
-          .values({ id, session_id: sessionID, time_created, data })
-          .onConflictDoUpdate({ target: MessageTable.id, set: { data } })
-          .run()
-          .pipe(Effect.orDie)
-      }),
-    )
-    yield* bus.project(SessionV1.Event.MessageRemoved, (event) =>
-      Effect.gen(function* () {
-        const rows = yield* db
-          .select()
-          .from(PartTable)
-          .where(and(eq(PartTable.message_id, event.data.messageID), eq(PartTable.session_id, event.data.sessionID)))
-          .all()
-          .pipe(Effect.orDie)
-        for (const row of rows) {
-          const previous = usage(row.data)
-          if (previous) yield* applyUsage(db, event.data.sessionID, previous, -1)
-        }
-        yield* db
-          .delete(MessageTable)
-          .where(and(eq(MessageTable.id, event.data.messageID), eq(MessageTable.session_id, event.data.sessionID)))
-          .run()
-          .pipe(Effect.orDie)
-      }),
-    )
-    yield* bus.project(SessionV1.Event.PartRemoved, (event) =>
-      Effect.gen(function* () {
-        const row = yield* db
-          .select()
-          .from(PartTable)
-          .where(and(eq(PartTable.id, event.data.partID), eq(PartTable.session_id, event.data.sessionID)))
-          .get()
-          .pipe(Effect.orDie)
-        const previous = row && usage(row.data)
-        if (previous) yield* applyUsage(db, event.data.sessionID, previous, -1)
-        yield* db
-          .delete(PartTable)
-          .where(and(eq(PartTable.id, event.data.partID), eq(PartTable.session_id, event.data.sessionID)))
-          .run()
-          .pipe(Effect.orDie)
-      }),
-    )
-    yield* bus.project(SessionV1.Event.PartUpdated, (event) =>
-      Effect.gen(function* () {
-        const id = event.data.part.id
-        const messageID = event.data.part.messageID
-        const sessionID = event.data.part.sessionID
-        const data = partData(event.data.part)
-        const row = yield* db.select().from(PartTable).where(eq(PartTable.id, id)).get().pipe(Effect.orDie)
-        yield* db
-          .insert(PartTable)
-          .values({ id, message_id: messageID, session_id: sessionID, time_created: event.data.time, data })
-          .onConflictDoUpdate({ target: PartTable.id, set: { data } })
-          .run()
-          .pipe(Effect.orDie)
-        const previous = row && usage(row.data)
-        const next = usage(event.data.part)
-        if (previous) yield* applyUsage(db, row.session_id, previous, -1)
-        if (next) yield* applyUsage(db, sessionID, next)
-      }),
-    )
     yield* bus.project(SessionEvent.AgentSelected, (event) =>
       db
         .update(SessionTable)

packages/core/src/session/sql.ts

@@ -8,7 +8,6 @@ import type { FileDiff } from "@opencode-ai/schema/file-diff"
 import { PermissionV1 } from "../v1/permission"
 import { Project } from "../project"
 import type { SessionSchema } from "./schema"
-import type { MessageID, PartID, SessionV1 } from "../v1/session"
 import { Workspace } from "../workspace"
 import { Timestamps } from "../database/schema.sql"
 import type { Instruction } from "@opencode-ai/schema/instruction"
@@ -18,11 +17,9 @@ import type { RevertV1 } from "@opencode-ai/schema/session-revert"
 import type { Schema } from "effect"
 
 type SessionMessageData = Omit<(typeof SessionMessage.Info)["Encoded"], "type" | "id">
-type V1MessageData = Omit<SessionV1.Info, "id" | "sessionID">
-type V1PartData = Omit<SessionV1.Part, "id" | "sessionID" | "messageID">
 
 export const SessionTable = sqliteTable(
-  "session",
+  "session_v2",
   {
     id: text().$type<SessionSchema.ID>().primaryKey(),
     project_id: text()
@@ -64,47 +61,15 @@ export const SessionTable = sqliteTable(
     time_suspended: integer(),
   },
   (table) => [
-    index("session_project_idx").on(table.project_id),
-    index("session_workspace_idx").on(table.workspace_id),
-    index("session_parent_idx").on(table.parent_id),
-    index("session_time_suspended_idx")
+    index("session_v2_project_idx").on(table.project_id),
+    index("session_v2_workspace_idx").on(table.workspace_id),
+    index("session_v2_parent_idx").on(table.parent_id),
+    index("session_v2_time_suspended_idx")
       .on(table.time_suspended)
       .where(sql`${table.time_suspended} is not null`),
   ],
 )
 
-export const MessageTable = sqliteTable(
-  "message",
-  {
-    id: text().$type<MessageID>().primaryKey(),
-    session_id: text()
-      .$type<SessionSchema.ID>()
-      .notNull()
-      .references(() => SessionTable.id, { onDelete: "cascade" }),
-    ...Timestamps,
-    data: text({ mode: "json" }).notNull().$type<V1MessageData>(),
-  },
-  (table) => [index("message_session_time_created_id_idx").on(table.session_id, table.time_created, table.id)],
-)
-
-export const PartTable = sqliteTable(
-  "part",
-  {
-    id: text().$type<PartID>().primaryKey(),
-    message_id: text()
-      .$type<MessageID>()
-      .notNull()
-      .references(() => MessageTable.id, { onDelete: "cascade" }),
-    session_id: text().$type<SessionSchema.ID>().notNull(),
-    ...Timestamps,
-    data: text({ mode: "json" }).notNull().$type<V1PartData>(),
-  },
-  (table) => [
-    index("part_message_id_id_idx").on(table.message_id, table.id),
-    index("part_session_idx").on(table.session_id),
-  ],
-)
-
 export const SessionMessageTable = sqliteTable(
   "session_message",
   {

packages/core/src/share/sql.ts

@@ -1,13 +0,0 @@
-import { sqliteTable, text } from "drizzle-orm/sqlite-core"
-import { SessionTable } from "../session/sql"
-import { Timestamps } from "../database/schema.sql"
-
-export const SessionShareTable = sqliteTable("session_share", {
-  session_id: text()
-    .primaryKey()
-    .references(() => SessionTable.id, { onDelete: "cascade" }),
-  id: text().notNull(),
-  secret: text().notNull(),
-  url: text().notNull(),
-  ...Timestamps,
-})

packages/core/src/v1/session.ts

@@ -1,68 +0,0 @@
-export * as SessionV1 from "./session"
-
-import { Schema } from "effect"
-import { NonNegativeInt } from "../schema"
-import { NamedError } from "../util/error"
-
-export {
-  AgentPart,
-  AgentPartInput,
-  Assistant,
-  CompactionPart,
-  Event,
-  FilePart,
-  FilePartInput,
-  FilePartSource,
-  FileSource,
-  Format,
-  Info,
-  MessageID,
-  OutputFormatJsonSchema,
-  OutputFormatText,
-  Part,
-  PartID,
-  PatchPart,
-  Range,
-  ReasoningPart,
-  ResourceSource,
-  RetryPart,
-  SessionInfo,
-  SnapshotPart,
-  StepFinishPart,
-  StepStartPart,
-  SubtaskPart,
-  SubtaskPartInput,
-  SymbolSource,
-  TextPart,
-  TextPartInput,
-  ToolPart,
-  ToolState,
-  ToolStateCompleted,
-  ToolStateError,
-  ToolStatePending,
-  ToolStateRunning,
-  User,
-  WithParts,
-} from "@opencode-ai/schema/session-v1"
-
-export const OutputLengthError = NamedError.create("MessageOutputLengthError", {})
-export const AuthError = NamedError.create("ProviderAuthError", { providerID: Schema.String, message: Schema.String })
-export const AbortedError = NamedError.create("MessageAbortedError", { message: Schema.String })
-export const StructuredOutputError = NamedError.create("StructuredOutputError", {
-  message: Schema.String,
-  retries: NonNegativeInt,
-})
-export const APIError = NamedError.create("APIError", {
-  message: Schema.String,
-  statusCode: Schema.optional(NonNegativeInt),
-  isRetryable: Schema.Boolean,
-  responseHeaders: Schema.optional(Schema.Record(Schema.String, Schema.String)),
-  responseBody: Schema.optional(Schema.String),
-  metadata: Schema.optional(Schema.Record(Schema.String, Schema.String)),
-})
-export type APIError = Schema.Schema.Type<typeof APIError.Schema>
-export const ContextOverflowError = NamedError.create("ContextOverflowError", {
-  message: Schema.String,
-  responseBody: Schema.optional(Schema.String),
-})
-export const ContentFilterError = NamedError.create("ContentFilterError", { message: Schema.String })

packages/core/test/bus.test.ts

@@ -4,7 +4,6 @@ import { Bus } from "@opencode-ai/core/bus"
 import { Event } from "@opencode-ai/schema/event"
 import { Session } from "@opencode-ai/schema/session"
 import { SessionEvent } from "@opencode-ai/schema/session-event"
-import { SessionV1 } from "@opencode-ai/schema/session-v1"
 import { Database } from "@opencode-ai/core/database/database"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
@@ -89,10 +88,10 @@ const VersionedMessage = Bus.durable({
   },
 })
 
-const DurableMessage = SessionV1.Event.MessageRemoved
+const DurableMessage = SessionEvent.Renamed
 const durableData = (sessionID: Session.ID, text: string) => ({
   sessionID,
-  messageID: SessionV1.MessageID.ascending(`msg_${text}`),
+  title: text,
 })
 
 /** Followed log read without markers: the old `durable` stream shape. */

packages/core/test/legacy-event-schema.test.ts

@@ -1,16 +0,0 @@
-import { describe, expect, test } from "bun:test"
-import { SessionV1 as Wire } from "@opencode-ai/schema/session-v1"
-import { SessionV1 } from "../src/v1/session"
-
-describe("legacy event schema compatibility", () => {
-  test("Core references canonical SessionV1 definitions", () => {
-    expect(SessionV1.Event.Created).toBe(Wire.Event.Created)
-    expect(SessionV1.Event.PartUpdated).toBe(Wire.Event.PartUpdated)
-  })
-
-  test("Core retains NamedError constructor identity", () => {
-    const error = new SessionV1.APIError({ message: "failed", isRetryable: false })
-    expect(error).toBeInstanceOf(SessionV1.APIError)
-    expect(error.toObject()).toEqual({ name: "APIError", data: { message: "failed", isRetryable: false } })
-  })
-})

packages/core/test/session-create.test.ts

@@ -16,7 +16,6 @@ import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { Provider } from "@opencode-ai/core/provider"
 import { AbsolutePath, RelativePath } from "@opencode-ai/core/schema"
 import { Session } from "@opencode-ai/core/session"
-import { SessionV1 } from "@opencode-ai/core/v1/session"
 import { SessionMessage } from "@opencode-ai/core/session/message"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
 import { SessionExecution } from "@opencode-ai/core/session/execution"
@@ -87,7 +86,7 @@ describe("Session.create", () => {
 
       expect(created.title).toBeUndefined()
       expect(row?.title).toBeNull()
-      expect(event?.data).not.toHaveProperty("info.title")
+      expect(event?.data).not.toHaveProperty("title")
       expect((yield* session.create({ location, title: "Explicit title" })).title).toBe("Explicit title")
     }),
   )
@@ -456,32 +455,7 @@ describe("Session.create", () => {
     }),
   )
 
-  it.effect("returns the current Session projection after projected updates", () =>
-    Effect.gen(function* () {
-      const session = yield* Session.Service
-      const bus = yield* Bus.Service
-      const input = { id, location }
-      const created = yield* session.create(input)
-
-      yield* bus.publish(SessionV1.Event.Updated, {
-        sessionID: id,
-        info: SessionV1.SessionInfo.make({
-          id,
-          slug: "updated",
-          version: "test",
-          projectID: created.projectID,
-          directory: created.location.directory,
-          title: "updated",
-          agent: "build",
-          time: { created: 0, updated: 1 },
-        }),
-      })
-
-      expect(yield* session.create(input)).toMatchObject({ id, agent: "build" })
-    }),
-  )
-
-  it.effect("persists creation through the existing legacy created event", () =>
+  it.effect("persists creation through the current created event", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service
       const { db } = yield* Database.Service
@@ -489,7 +463,7 @@ describe("Session.create", () => {
 
       expect(
         yield* db.select().from(EventTable).where(eq(EventTable.aggregate_id, created.id)).all().pipe(Effect.orDie),
-      ).toMatchObject([{ type: Bus.versionedType(SessionV1.Event.Created.type, 1) }])
+      ).toMatchObject([{ type: Bus.versionedType(SessionEvent.Created.type, 1) }])
     }),
   )
 
@@ -507,7 +481,7 @@ describe("Session.create", () => {
     }),
   )
 
-  it.effect("omits legacy creation rows from the Session event stream", () =>
+  it.effect("includes current creation rows in the Session event stream", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service
       const bus = yield* Bus.Service
@@ -521,8 +495,9 @@ describe("Session.create", () => {
       yield* SessionPending.promote(db, bus, created.id, "steer")
 
       expect(
-        Array.from(yield* logEvents(session, created.id, true).pipe(Stream.take(2), Stream.runCollect)),
+        Array.from(yield* logEvents(session, created.id, true).pipe(Stream.take(3), Stream.runCollect)),
       ).toMatchObject([
+        { durable: { seq: 0 }, type: "session.created" },
         {
           durable: { seq: 1 },
           type: "session.input.admitted",
@@ -605,7 +580,7 @@ describe("Session.create", () => {
             .all()
             .pipe(Effect.orDie)).map((event) => [event.seq, event.type]),
         ).toEqual([
-          [0, Bus.versionedType(SessionV1.Event.Created.type, 1)],
+          [0, Bus.versionedType(SessionEvent.Created.type, 1)],
           [1, Bus.versionedType(SessionEvent.InputAdmitted.type, 1)],
           [2, Bus.versionedType(SessionEvent.InputPromoted.type, 1)],
         ])
@@ -618,7 +593,7 @@ describe("Session.create", () => {
       const session = yield* Session.Service
       const event = yield* Bus.Service
       const defect = new Error("unrelated projector defect")
-      yield* event.project(SessionV1.Event.Created, () => Effect.die(defect))
+      yield* event.project(SessionEvent.Created, () => Effect.die(defect))
 
       expect(yield* session.create({ id, location }).pipe(Effect.catchDefect(Effect.succeed))).toBe(defect)
     }),
@@ -672,7 +647,7 @@ describe("Session.create", () => {
 
       expect(yield* session.get(created.id)).toMatchObject({ agent: "plan" })
       expect(
-        Array.from(yield* logEvents(session, created.id, true).pipe(Stream.take(1), Stream.runCollect)),
+        Array.from(yield* logEvents(session, created.id, true).pipe(Stream.drop(1), Stream.take(1), Stream.runCollect)),
       ).toMatchObject([{ type: "session.agent.selected", data: { agent: "plan" } }])
     }),
   )
@@ -704,7 +679,9 @@ describe("Session.create", () => {
       yield* session.switchModel({ sessionID: created.id, model })
 
       expect(yield* session.get(created.id)).toMatchObject({ model })
-      const bus = Array.from(yield* logEvents(session, created.id, true).pipe(Stream.take(1), Stream.runCollect))
+      const bus = Array.from(
+        yield* logEvents(session, created.id, true).pipe(Stream.drop(1), Stream.take(1), Stream.runCollect),
+      )
       expect(bus).toMatchObject([{ type: "session.model.selected" }])
       expect(bus[0]?.data).toEqual({ sessionID: created.id, model })
     }),

packages/core/test/session-move.test.ts

@@ -0,0 +1,58 @@
+import { describe, expect } from "bun:test"
+import path from "path"
+import { Effect, Layer } from "effect"
+import { Bus } from "@opencode-ai/core/bus"
+import { Database } from "@opencode-ai/core/database/database"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { Location } from "@opencode-ai/core/location"
+import { Project } from "@opencode-ai/core/project"
+import { AbsolutePath } from "@opencode-ai/core/schema"
+import { Session } from "@opencode-ai/core/session"
+import { SessionExecution } from "@opencode-ai/core/session/execution"
+import { SessionProjector } from "@opencode-ai/core/session/projector"
+import { SessionStore } from "@opencode-ai/core/session/store"
+import { LayerNode } from "@opencode-ai/util/effect/layer-node"
+import { tmpdir } from "./fixture/tmpdir"
+import { testEffect } from "./lib/effect"
+
+const projects = Layer.succeed(
+  Project.Service,
+  Project.Service.of({
+    list: () => Effect.succeed([]),
+    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+    directories: () => Effect.succeed([]),
+    commit: () => Effect.void,
+  }),
+)
+const it = testEffect(
+  AppNodeBuilder.build(
+    LayerNode.group([Database.node, Bus.node, SessionProjector.node, SessionStore.node, Session.node]),
+    [
+      [Project.node, projects],
+      [SessionExecution.node, SessionExecution.noopLayer],
+    ],
+  ),
+)
+
+describe("Session.move", () => {
+  it.effect("moves a session whose source directory no longer exists", () =>
+    Effect.acquireRelease(
+      Effect.promise(() => tmpdir()),
+      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
+    ).pipe(
+      Effect.flatMap((tmp) =>
+        Effect.gen(function* () {
+          const session = yield* Session.Service
+          const destination = AbsolutePath.make(tmp.path)
+          const created = yield* session.create({
+            location: Location.Ref.make({ directory: AbsolutePath.make(path.join(tmp.path, "deleted")) }),
+          })
+
+          yield* session.move({ sessionID: created.id, directory: destination })
+
+          expect((yield* session.get(created.id)).location.directory).toBe(destination)
+        }),
+      ),
+    ),
+  )
+})

packages/protocol/src/api.ts

@@ -31,6 +31,7 @@ import { CredentialGroup } from "./groups/credential.js"
 import { ProjectGroup } from "./groups/project.js"
 import { ProjectCopyGroup } from "./groups/project-copy.js"
 import { VcsGroup } from "./groups/vcs.js"
+import { MigrationGroup } from "./groups/migration.js"
 
 type LocationGroups<LocationId extends HttpApiMiddleware.AnyId> =
   | HttpApiGroup.AddMiddleware<typeof LocationGroup, LocationId>
@@ -55,7 +56,7 @@ type LocationGroups<LocationId extends HttpApiMiddleware.AnyId> =
 
 type SessionGroups<SessionLocationId extends HttpApiMiddleware.AnyId, SessionLocationService> =
   | ReturnType<typeof makeSessionGroup<SessionLocationId, SessionLocationService>>
-  | HttpApiGroup.AddMiddleware<typeof MessageGroup, SessionLocationId>
+  | typeof MessageGroup
 
 type FormGroups<
   LocationId extends HttpApiMiddleware.AnyId,
@@ -85,6 +86,7 @@ type ApiGroups<
   | typeof HealthGroup
   | typeof ServerGroup
   | typeof DebugGroup
+  | typeof MigrationGroup
   | LocationGroups<LocationId>
   | FormGroups<LocationId, LocationService, FormLocationId, FormLocationService>
   | SessionGroups<SessionLocationId, SessionLocationService>
@@ -150,7 +152,7 @@ const makeApiFromGroup = <
     .add(AgentGroup.middleware(locationMiddleware))
     .add(PluginGroup.middleware(locationMiddleware))
     .add(makeSessionGroup(sessionLocationMiddleware))
-    .add(MessageGroup.middleware(sessionLocationMiddleware))
+    .add(MessageGroup)
     .add(ModelGroup.middleware(locationMiddleware))
     .add(GenerateGroup.middleware(locationMiddleware))
     .add(ProviderGroup.middleware(locationMiddleware))
@@ -171,6 +173,7 @@ const makeApiFromGroup = <
     .add(ProjectCopyGroup.middleware(locationMiddleware))
     .add(VcsGroup.middleware(locationMiddleware))
     .add(DebugGroup)
+    .add(MigrationGroup)
     .add(WebSearchGroup.middleware(locationMiddleware))
     .annotateMerge(
       OpenApi.annotations({

packages/protocol/src/client.ts

@@ -36,6 +36,7 @@ export const groupNames = {
   "server.health": "health",
   "server.server": "server",
   "server.debug": "debug",
+  "server.migration": "migration",
   "server.location": "location",
   "server.agent": "agent",
   "server.plugin": "plugin",

packages/protocol/src/groups/migration.ts

@@ -0,0 +1,35 @@
+import { Schema } from "effect"
+import { HttpApiEndpoint, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
+
+export const V1MigrationStatus = Schema.Struct({
+  status: Schema.Literals(["required", "running", "completed"]),
+  completed: Schema.Int.check(Schema.isGreaterThanOrEqualTo(0)),
+  total: Schema.Int.check(Schema.isGreaterThanOrEqualTo(0)),
+})
+
+export const V1MigrationResult = Schema.Struct({ status: Schema.Literal("completed") })
+
+export const MigrationGroup = HttpApiGroup.make("server.migration")
+  .add(
+    HttpApiEndpoint.get("migration.v1.status", "/api/experimental/migration/v1", {
+      success: V1MigrationStatus,
+    }).annotateMerge(
+      OpenApi.annotations({
+        identifier: "v2.experimental.migration.v1.status",
+        summary: "Get V1 migration status",
+        description: "Return the progress of the V1 to V2 session history migration.",
+      }),
+    ),
+  )
+  .add(
+    HttpApiEndpoint.post("migration.v1.run", "/api/experimental/migration/v1", {
+      success: V1MigrationResult,
+    }).annotateMerge(
+      OpenApi.annotations({
+        identifier: "v2.experimental.migration.v1.run",
+        summary: "Run V1 migration",
+        description: "Run or resume the V1 to V2 session history migration and wait for completion.",
+      }),
+    ),
+  )
+  .annotateMerge(OpenApi.annotations({ title: "migration" }))

packages/protocol/src/groups/session.ts

@@ -181,7 +181,6 @@ export const makeSessionGroup = <I extends HttpApiMiddleware.AnyId, S>(sessionLo
         success: Schema.Struct({ data: Session.Info }),
         error: SessionNotFoundError,
       })
-        .middleware(sessionLocationMiddleware)
         .annotateMerge(
           OpenApi.annotations({
             identifier: "v2.session.get",
@@ -276,7 +275,6 @@ export const makeSessionGroup = <I extends HttpApiMiddleware.AnyId, S>(sessionLo
         success: HttpApiSchema.NoContent,
         error: [SessionNotFoundError, InvalidRequestError],
       })
-        .middleware(sessionLocationMiddleware)
         .annotateMerge(
           OpenApi.annotations({
             identifier: "v2.session.move",
@@ -470,7 +468,6 @@ export const makeSessionGroup = <I extends HttpApiMiddleware.AnyId, S>(sessionLo
         success: Schema.Struct({ data: Schema.Array(SessionMessage.Info) }),
         error: [SessionNotFoundError, UnknownError],
       })
-        .middleware(sessionLocationMiddleware)
         .annotateMerge(
           OpenApi.annotations({
             identifier: "v2.session.context",
@@ -485,7 +482,6 @@ export const makeSessionGroup = <I extends HttpApiMiddleware.AnyId, S>(sessionLo
         success: Schema.Struct({ data: Schema.Array(SessionPending.Info) }),
         error: SessionNotFoundError,
       })
-        .middleware(sessionLocationMiddleware)
         .annotateMerge(
           OpenApi.annotations({
             identifier: "v2.session.pending.list",
@@ -573,7 +569,6 @@ export const makeSessionGroup = <I extends HttpApiMiddleware.AnyId, S>(sessionLo
         }),
         error: SessionNotFoundError,
       })
-        .middleware(sessionLocationMiddleware)
         .annotateMerge(
           OpenApi.annotations({
             identifier: "v2.session.log",
@@ -620,7 +615,6 @@ export const makeSessionGroup = <I extends HttpApiMiddleware.AnyId, S>(sessionLo
         success: Schema.Struct({ data: SessionMessage.Info }),
         error: [SessionNotFoundError, MessageNotFoundError],
       })
-        .middleware(sessionLocationMiddleware)
         .annotateMerge(
           OpenApi.annotations({
             identifier: "v2.session.message",

packages/schema/src/durable-event-manifest.ts

@@ -2,11 +2,10 @@ export * as DurableEventManifest from "./durable-event-manifest.js"
 
 import { Event } from "./event.js"
 import { SessionEvent } from "./session-event.js"
-import { SessionV1 } from "./session-v1.js"
 
 export const SessionDurable = {
   definitions: Event.durableMap(SessionEvent.DurableDefinitions),
   schema: SessionEvent.Durable,
 } as const
 
-export const Durable = Event.durableMap([...SessionV1.Event.Definitions, ...SessionEvent.DurableDefinitions])
+export const Durable = Event.durableMap(SessionEvent.DurableDefinitions)

packages/schema/src/event-manifest.ts

@@ -29,21 +29,13 @@ import { Skill } from "./skill.js"
 import { SessionCompactionEvent } from "./session-compaction-event.js"
 import { SessionEvent } from "./session-event.js"
 import { SessionStatusEvent } from "./session-status-event.js"
-import { SessionV1 } from "./session-v1.js"
 import { TuiEvent } from "./tui-event.js"
 import { VcsEvent } from "./vcs-event.js"
 import { WorkspaceEvent } from "./workspace-event.js"
 import { WorktreeEvent } from "./worktree-event.js"
 import { WebSearch } from "./websearch.js"
 
-const sessionV1DurableDefinitions = SessionV1.Event.Definitions.filter(
-  (definition) => definition.durability === "durable",
-)
-const sessionV1LiveDefinitions = SessionV1.Event.Definitions.filter(
-  (definition) => definition.durability === "ephemeral",
-)
-
-const coreDefinitions = Event.inventory(...sessionV1DurableDefinitions, ...SessionEvent.Definitions)
+const coreDefinitions = Event.inventory(...SessionEvent.Definitions)
 
 const foundationDefinitions = Event.inventory(
   ...ModelsDev.Event.Definitions,
@@ -79,8 +71,6 @@ export const ServerDefinitions = Event.inventory(
   ...VcsEvent.Definitions,
   McpEvent.StatusChanged,
   McpEvent.ResourcesChanged,
-  // Shared transitional event retained until the TUI moves to the current session error surface.
-  SessionV1.Error,
 )
 export const Server = Event.latest(ServerDefinitions)
 export type ServerEvent = Schema.Schema.Type<(typeof ServerDefinitions)[number]>
@@ -88,7 +78,6 @@ export const isServer = (event: { readonly type: string }): event is ServerEvent
 
 export const Definitions = Event.inventory(
   ...foundationDefinitions,
-  ...sessionV1LiveDefinitions,
   ...InstallationEvent.Definitions,
   ...featureDefinitions,
   ...LspEvent.Definitions,

packages/schema/src/session-event.ts

@@ -45,6 +45,24 @@ const options = {
     version: 1,
   },
 } as const
+export const Created = Event.durable({
+  type: "session.created",
+  ...options,
+  schema: {
+    ...Base,
+    projectID: Project.ID,
+    location: Location.Ref,
+    subpath: RelativePath.pipe(optional),
+    parentID: SessionID.pipe(optional),
+    slug: Schema.String,
+    title: Schema.String.pipe(optional),
+    agent: Agent.ID.pipe(optional),
+    model: Model.Ref.pipe(optional),
+    version: Schema.String,
+  },
+})
+export type Created = typeof Created.Type
+
 export const AgentSelected = Event.durable({
   type: "session.agent.selected",
   ...options,
@@ -547,6 +565,7 @@ export namespace RevertEvent {
 }
 
 export const Definitions = Event.inventory(
+  Created,
   AgentSelected,
   ModelSelected,
   Moved,

packages/schema/test/event-manifest.test.ts

@@ -19,7 +19,6 @@ import { Plugin } from "../src/plugin.js"
 import { SessionEvent } from "../src/session-event.js"
 import { SessionID } from "../src/session-id.js"
 import { SessionMessage } from "../src/session-message.js"
-import { SessionV1 } from "../src/session-v1.js"
 import { WorkspaceEvent } from "../src/workspace-event.js"
 
 describe("public event manifest", () => {
@@ -32,18 +31,6 @@ describe("public event manifest", () => {
     expect(EventManifest.Definitions.filter((definition) => definition.type === "agent.updated")).toEqual([
       Agent.Event.Updated,
     ])
-    expect(SessionV1.Event.Definitions).toEqual([
-      SessionV1.Event.Created,
-      SessionV1.Event.Updated,
-      SessionV1.Event.Deleted,
-      SessionV1.Event.MessageUpdated,
-      SessionV1.Event.MessageRemoved,
-      SessionV1.Event.PartUpdated,
-      SessionV1.Event.PartRemoved,
-      SessionV1.Event.PartDelta,
-      SessionV1.Event.Diff,
-      SessionV1.Event.Error,
-    ])
     expect(Array.from(EventManifest.Latest.keys())).toEqual(
       Array.from(new Set(EventManifest.Definitions.map((definition) => definition.type))),
     )
@@ -51,6 +38,7 @@ describe("public event manifest", () => {
     expect(EventManifest.Latest.get("plugin.updated")).toBe(Plugin.Event.Updated)
     expect(EventManifest.Server.get("mcp.status.changed")).toBe(McpEvent.StatusChanged)
     expect(EventManifest.Server.get("mcp.resources.changed")).toBe(McpEvent.ResourcesChanged)
+    expect(EventManifest.Server.get("session.created")).toBe(SessionEvent.Created)
     expect(EventManifest.Server.get("session.deleted")).toBe(SessionEvent.Deleted)
     expect(EventManifest.Server.has("mcp.tools.changed")).toBe(false)
     expect(Agent.Event.Updated.durable).toBeUndefined()
@@ -79,12 +67,6 @@ describe("public event manifest", () => {
     expect(EventManifest.Latest.has("mcp.browser.open.failed")).toBe(false)
     expect(EventManifest.Latest.has("ide.installed")).toBe(false)
     expect(IdeEvent.Definitions).toEqual([IdeEvent.Installed])
-    const sessionV1TailStart = EventManifest.Definitions.indexOf(SessionV1.Event.PartDelta)
-    expect(EventManifest.Definitions.slice(sessionV1TailStart, sessionV1TailStart + 3)).toEqual([
-      SessionV1.Event.PartDelta,
-      SessionV1.Event.Diff,
-      SessionV1.Event.Error,
-    ])
     expect(EventManifest.Durable.get("session.step.ended.1")).toBe(SessionEvent.Step.Ended)
     expect(EventManifest.Durable.has("session.step.ended.2")).toBe(false)
   })
@@ -93,13 +75,7 @@ describe("public event manifest", () => {
     expect(Array.from(EventManifest.Durable.keys()).toSorted()).toEqual(
       [
         "session.created.1",
-        "session.updated.1",
-        "session.deleted.1",
         "session.deleted.2",
-        "message.updated.1",
-        "message.removed.1",
-        "message.part.updated.1",
-        "message.part.removed.1",
         "session.agent.selected.1",
         "session.model.selected.1",
         "session.moved.1",

packages/server/src/handlers.ts

@@ -28,11 +28,13 @@ import { ProjectHandler } from "./handlers/project"
 import { ProjectCopyHandler } from "./handlers/project-copy"
 import { VcsHandler } from "./handlers/vcs"
 import { EventFeed } from "./event-feed"
+import { MigrationHandler } from "./handlers/migration"
 
 export const handlers = Layer.mergeAll(
   HealthHandler,
   ServerHandler,
   DebugHandler,
+  MigrationHandler,
   LocationHandler,
   AgentHandler,
   PluginHandler,

packages/server/src/handlers/migration.ts

@@ -0,0 +1,9 @@
+import { V1Migration } from "@opencode-ai/core/database/v1-migration"
+import { HttpApiBuilder } from "effect/unstable/httpapi"
+import { Api } from "../api"
+
+export const MigrationHandler = HttpApiBuilder.group(Api, "server.migration", (handlers) =>
+  handlers
+    .handle("migration.v1.status", () => V1Migration.status())
+    .handle("migration.v1.run", () => V1Migration.run()),
+)

packages/server/src/handlers/session.ts

@@ -650,13 +650,21 @@ export const SessionHandler = HttpApiBuilder.group(Api, "server.session", (handl
       )
       .handle(
         "session.log",
-        Effect.fn((ctx) =>
-          Effect.succeed(
-            session
-              .log({ sessionID: ctx.params.sessionID, after: ctx.query.after, follow: ctx.query.follow })
-              .pipe(Stream.orDie),
-          ),
-        ),
+        Effect.fn(function* (ctx) {
+          yield* session.get(ctx.params.sessionID).pipe(
+            Effect.catchTag(
+              "Session.NotFoundError",
+              (error) =>
+                new SessionNotFoundError({
+                  sessionID: error.sessionID,
+                  message: `Session not found: ${error.sessionID}`,
+                }),
+            ),
+          )
+          return session
+            .log({ sessionID: ctx.params.sessionID, after: ctx.query.after, follow: ctx.query.follow })
+            .pipe(Stream.orDie)
+        }),
       )
       .handle(
         "session.interrupt",
@@ -684,6 +692,16 @@ export const SessionHandler = HttpApiBuilder.group(Api, "server.session", (handl
       .handle(
         "session.message",
         Effect.fn(function* (ctx) {
+          yield* session.get(ctx.params.sessionID).pipe(
+            Effect.catchTag(
+              "Session.NotFoundError",
+              (error) =>
+                new SessionNotFoundError({
+                  sessionID: error.sessionID,
+                  message: `Session not found: ${error.sessionID}`,
+                }),
+            ),
+          )
           const message = yield* session.message(ctx.params)
           if (message) return { data: message }
           return yield* new MessageNotFoundError({

packages/server/src/process.ts

@@ -31,6 +31,14 @@ type App = Effect.Effect<
   HttpServerRequest.HttpServerRequest | Scope.Scope
 >
 
+const errorResponseLogger = HttpMiddleware.make((app) =>
+  HttpMiddleware.logger(
+    Effect.tap(app, (response) =>
+      response.status < 400 ? HttpMiddleware.withLoggerDisabled(Effect.void) : Effect.void,
+    ),
+  ),
+)
+
 export const start = Effect.fn("ServerProcess.start")(function* <E, R>(
   options: ServerOptions,
   lifecycle?: Lifecycle<E, R>,
@@ -52,7 +60,7 @@ export const start = Effect.fn("ServerProcess.start")(function* <E, R>(
       dispatch(password, status, application, shutdown, options.app?.version ?? "unknown").pipe(
         HttpMiddleware.cors({ allowedOrigins: isAllowedCorsOrigin, maxAge: 86_400 }),
       ),
-      HttpMiddleware.logger,
+      errorResponseLogger,
     )
     .pipe(withoutParentSpan)
   if (lifecycle)

packages/tui/src/app.tsx

@@ -30,6 +30,7 @@ import {
   batch,
   Show,
 } from "solid-js"
+import { createStore } from "solid-js/store"
 import {
   TuiLifecycleProvider,
   TuiAppProvider,
@@ -50,6 +51,7 @@ import { ClientProvider, useClient } from "./context/client"
 import { StartupLoading } from "./component/startup-loading"
 import { DevToolsBar } from "./component/devtools-bar"
 import { Reconnecting } from "./component/reconnecting"
+import { MigrationOverlay } from "./component/migration-overlay"
 import { DataProvider, useData } from "./context/data"
 import { SessionTabsProvider, useSessionTabs } from "./context/session-tabs"
 import { LocationProvider, useLocation } from "./context/location"
@@ -95,6 +97,7 @@ import { destroyRenderer } from "./util/renderer"
 import { cliErrorMessage, errorFormat } from "./util/error"
 import { AttentionProvider } from "./context/attention"
 import { StorageProvider } from "./context/storage"
+import { Migration } from "./migration"
 
 registerOpencodeSpinner()
 
@@ -187,21 +190,6 @@ export type TuiInput = {
   log?: LogSink
 }
 
-function errorMessage(error: unknown) {
-  if (
-    typeof error === "object" &&
-    error !== null &&
-    "data" in error &&
-    typeof error.data === "object" &&
-    error.data !== null &&
-    "message" in error.data &&
-    typeof error.data.message === "string"
-  ) {
-    return error.data.message
-  }
-  return error instanceof Error ? error.message : String(error)
-}
-
 export const run = Effect.fn("Tui.run")(function* (input: TuiInput) {
   const log = input.log ?? (() => {})
   const global = yield* Global.Service
@@ -215,9 +203,7 @@ export const run = Effect.fn("Tui.run")(function* (input: TuiInput) {
     Effect.catch(() => Effect.tryPromise(() => api.location.get())),
   )
   const directory = location.directory
-  const pluginDirectories = yield* Effect.promise(() =>
-    tuiPluginDirectories(process.cwd(), global.config),
-  )
+  const pluginDirectories = yield* Effect.promise(() => tuiPluginDirectories(process.cwd(), global.config))
   const handoff = input.terminalHandoff ? yield* Effect.promise(input.terminalHandoff) : undefined
   const managed = input.server.service
   const service = managed
@@ -472,6 +458,32 @@ function App(props: { pair?: DialogPairCredentials }) {
   const promptRef = usePromptRef()
   const plugins = usePlugin()
   const clipboard = useClipboard()
+  const [migration, setMigration] = createStore({ active: false, completed: 0, total: 0 })
+  const migrationAbort = new AbortController()
+
+  onMount(async () => {
+    await Bun.sleep(1_000)
+    void Migration.run(
+      client.api,
+      (status) =>
+        setMigration({
+          active: status.status !== "completed",
+          completed: status.completed,
+          total: status.total,
+        }),
+      migrationAbort.signal,
+    ).catch((error) => {
+      if (migrationAbort.signal.aborted) return
+      setMigration("active", false)
+      toast.show({
+        variant: "error",
+        title: "Data migration failed",
+        message: error instanceof Error ? error.message : String(error),
+        duration: 10_000,
+      })
+    })
+  })
+  onCleanup(() => migrationAbort.abort())
 
   // Toast once when an MCP server enters a failed or needs-auth state so the user knows to act,
   // without having to open the status panel. Tracking the last alerted status avoids re-toasting
@@ -1170,15 +1182,11 @@ function App(props: { pair?: DialogPairCredentials }) {
     }
   })
 
-  event.on("session.error", (evt, { workspace }) => {
+  event.on("session.execution.failed", (evt, { workspace }) => {
     if (workspace !== (location.current?.workspaceID ?? data.location.default().workspaceID)) return
-    const error = evt.data.error
-    if (error && typeof error === "object" && error.name === "MessageAbortedError") return
-    const message = errorMessage(error)
-
     toast.show({
       variant: "error",
-      message,
+      message: evt.data.error.message,
       duration: 5000,
     })
   })
@@ -1266,6 +1274,9 @@ function App(props: { pair?: DialogPairCredentials }) {
       <Show when={showReconnecting()}>
         <Reconnecting />
       </Show>
+      <Show when={migration.active}>
+        <MigrationOverlay completed={migration.completed} total={migration.total} />
+      </Show>
       <Toast />
     </box>
   )

packages/tui/src/component/migration-overlay.tsx

@@ -0,0 +1,29 @@
+import { useTheme } from "../context/theme"
+import { SplitBorder } from "../ui/border"
+import { Spinner } from "./spinner"
+
+export function MigrationOverlay(props: { completed: number; total: number }) {
+  const theme = useTheme("overlay")
+
+  return (
+    <box
+      position="absolute"
+      zIndex={10_000}
+      top={1}
+      right={2}
+      flexDirection="row"
+      backgroundColor={theme.background.default}
+      border={["left"]}
+      borderColor={theme.text.feedback.info.default}
+      customBorderChars={SplitBorder.customBorderChars}
+      paddingLeft={2}
+      paddingRight={2}
+      paddingTop={1}
+      paddingBottom={1}
+    >
+      <Spinner color={theme.text.feedback.info.default}>
+        Migrating sessions {props.completed}/{props.total}
+      </Spinner>
+    </box>
+  )
+}

packages/tui/src/context/session-tabs.tsx

@@ -207,11 +207,6 @@ export const { use: useSessionTabs, provider: SessionTabsProvider } = createSimp
         setPromptPulses((pulses) => ({ ...pulses, [sessionID]: (pulses[sessionID] ?? 0) + 1 }))
       }),
     )
-    onCleanup(
-      event.on("session.error", (evt) => {
-        if (evt.data.sessionID) markUnread(evt.data.sessionID, "error")
-      }),
-    )
     onCleanup(
       event.on("session.deleted", (evt) => {
         const target = root(evt.data.sessionID)
@@ -223,8 +218,8 @@ export const { use: useSessionTabs, provider: SessionTabsProvider } = createSimp
     function remove(sessionID: string, navigate: boolean) {
       const target = root(sessionID)
       const closed = closeSessionTab(state().tabs, target)
-      if (closed.tabs === state().tabs) return
       const selected = navigate && current() === target
+      if (closed.tabs === state().tabs && !selected) return
       const previous = selected
         ? moveSessionTabHistory(recordSessionTabHistory(history, target), closed.tabs, target, -1)
         : { history, sessionID: undefined }

packages/tui/src/feature-plugins/system/notifications.ts

@@ -1,8 +1,5 @@
 import { Plugin } from "@opencode-ai/plugin/tui"
 import type { AttentionSoundName } from "@opencode-ai/plugin/tui/context"
-import type { OpenCodeEvent } from "@opencode-ai/client"
-
-type SessionError = Extract<OpenCodeEvent, { type: "session.error" }>["data"]["error"]
 
 function notify(
   context: Plugin.Context,
@@ -21,15 +18,6 @@ function notify(
   })
 }
 
-function sessionErrorMessage(error: SessionError) {
-  if (error?.name === "MessageAbortedError") return "Session aborted"
-  const data = error?.data
-  if (data && typeof data === "object" && "message" in data && data.message === "SSE read timed out") {
-    return "Model stopped responding"
-  }
-  return "Session error"
-}
-
 export default Plugin.define({
   id: "opencode.notifications",
   setup(context) {
@@ -88,14 +76,6 @@ export default Plugin.define({
         notify(context, sessionID, event.data.error.message, "error")
         ended(sessionID)
       }),
-      context.data.on("session.error", (event) => {
-        const sessionID = event.data.sessionID
-        if (!sessionID) return
-        if (context.data.session.status(sessionID) !== "running") return
-        if (errored.has(sessionID)) return
-        errored.add(sessionID)
-        notify(context, sessionID, sessionErrorMessage(event.data.error), "error")
-      }),
     ]
 
     return () => dispose.reverse().forEach((cleanup) => cleanup())

packages/tui/src/migration.test.ts

@@ -0,0 +1,46 @@
+import { expect, test } from "bun:test"
+import { Migration } from "./migration"
+
+test("skips a completed migration", async () => {
+  const updates: Migration.Status[] = []
+  const client = {
+    migration: {
+      v1: {
+        status: async () => ({ status: "completed" as const, completed: 2, total: 2 }),
+        run: async () => ({ status: "completed" as const }),
+      },
+    },
+  }
+
+  expect(await Migration.run(client, (status) => updates.push(status))).toBe(false)
+  expect(updates).toEqual([])
+})
+
+test("polls committed session progress while migration runs", async () => {
+  const updates: Migration.Status[] = []
+  let completed = 0
+  let finish: (() => void) | undefined
+  const client = {
+    migration: {
+      v1: {
+        status: async () => ({
+          status: completed === 2 ? ("completed" as const) : ("running" as const),
+          completed,
+          total: 2,
+        }),
+        run: () =>
+          new Promise<{ status: "completed" }>((resolve) => {
+            finish = () => resolve({ status: "completed" })
+          }),
+      },
+    },
+  }
+
+  const running = Migration.run(client, (status) => updates.push(status))
+  await Bun.sleep(1_050)
+  completed = 2
+  finish?.()
+  expect(await running).toBe(true)
+  expect(updates).toContainEqual({ status: "running", completed: 0, total: 2 })
+  expect(updates).toContainEqual({ status: "completed", completed: 2, total: 2 })
+})

packages/tui/src/migration.ts

@@ -0,0 +1,33 @@
+import type { OpenCodeClient } from "@opencode-ai/client"
+
+type Client = Pick<OpenCodeClient, "migration">
+export type Status = Awaited<ReturnType<Client["migration"]["v1"]["status"]>>
+
+export async function run(client: Client, update: (status: Status) => void, signal?: AbortSignal) {
+  const initial = await client.migration.v1.status({ signal })
+  if (initial.status === "completed") return false
+  update(initial)
+
+  let polling = false
+  const progress = setInterval(() => {
+    if (polling) return
+    polling = true
+    void client.migration.v1
+      .status({ signal })
+      .then(update)
+      .catch(() => {})
+      .finally(() => {
+        polling = false
+      })
+  }, 1_000)
+
+  try {
+    await client.migration.v1.run({ signal })
+    update(await client.migration.v1.status({ signal }))
+    return true
+  } finally {
+    clearInterval(progress)
+  }
+}
+
+export * as Migration from "./migration"

packages/tui/src/routes/session/index.tsx

@@ -96,6 +96,7 @@ import { findMessageBoundary, messageNavigationSlack } from "./message-navigatio
 import { stringWidth } from "../../util/string-width"
 import { useArgs } from "../../context/args"
 import { withTimestampedFallback } from "@opencode-ai/util/session-title-fallback"
+import { useSessionTabs } from "../../context/session-tabs"
 
 addDefaultParsers(parsers.parsers)
 
@@ -244,6 +245,7 @@ export function Session() {
   const [navigationMessage, setNavigationMessage] = createSignal<string>()
   const [navigationSlack, setNavigationSlack] = createSignal(0)
   const [synced, setSynced] = createSignal(false)
+  const sessionTabs = useSessionTabs()
 
   const clearMessageNavigation = () => {
     setNavigationSlack(0)
@@ -262,7 +264,7 @@ export function Session() {
   createEffect(
     on([descendantSessionIDs, () => client.connection.status()], ([sessionIDs, status]) => {
       if (status !== "connected") return
-      void Promise.all(
+      void Promise.allSettled(
         sessionIDs.flatMap((sessionID) => [data.session.permission.sync(sessionID), data.session.form.sync(sessionID)]),
       )
     }),
@@ -275,8 +277,8 @@ export function Session() {
     void (async () => {
       await Promise.all([
         data.session.sync(sessionID, { children: true }),
-        data.session.permission.sync(sessionID),
-        data.session.form.sync(sessionID),
+        data.session.permission.sync(sessionID).catch(() => undefined),
+        data.session.form.sync(sessionID).catch(() => undefined),
       ])
       const info = data.session.get(sessionID)
       if (!info) {
@@ -285,7 +287,7 @@ export function Session() {
           variant: "error",
           duration: 5000,
         })
-        navigate({ type: "home" })
+        sessionTabs.enabled() ? sessionTabs.close(sessionID) : navigate({ type: "home" })
         return
       }
       editor.reconnect(info.location.directory)
@@ -298,7 +300,7 @@ export function Session() {
         variant: "error",
         duration: 5000,
       })
-      navigate({ type: "home" })
+      sessionTabs.enabled() ? sessionTabs.close(sessionID) : navigate({ type: "home" })
     })
   })
 

packages/tui/test/cli/cmd/tui/notifications.test.ts

@@ -293,39 +293,4 @@ describe("internal notifications TUI plugin", () => {
       },
     ])
   })
-
-  test("special-cases aborts and model response timeouts", async () => {
-    const harness = await setup()
-
-    harness.emit(executionStarted("event-1", "abort"))
-    harness.emit({
-      id: "event-2",
-      created: 0,
-      type: "session.error",
-      data: { sessionID: "abort", error: { name: "MessageAbortedError", data: { message: "Aborted" } } },
-    })
-    harness.emit(executionStarted("event-3", "timeout"))
-    harness.emit({
-      id: "event-4",
-      created: 0,
-      type: "session.error",
-      data: { sessionID: "timeout", error: { name: "UnknownError", data: { message: "SSE read timed out" } } },
-    })
-    harness.emit(executionFailed("event-5", "timeout"))
-
-    expect(harness.notifications).toEqual([
-      {
-        title: "Abort session",
-        message: "Session aborted",
-        notification: { when: "blurred" },
-        sound: { name: "error", when: "always" },
-      },
-      {
-        title: "Timeout session",
-        message: "Model stopped responding",
-        notification: { when: "blurred" },
-        sound: { name: "error", when: "always" },
-      },
-    ])
-  })
 })