refactor(core): simplify automatic web search

packages/core/src/filesystem/search.ts

@@ -2,7 +2,7 @@ export * as FileSystemSearch from "./search.js"
 
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import path from "path"
-import { Clock, Context, Duration, Effect, Layer, Schema, Scope } from "effect"
+import { Context, Effect, Layer, Schema, Scope } from "effect"
 import { Fff } from "#fff"
 import fuzzysort from "fuzzysort"
 import { FileSystem } from "../filesystem.js"
@@ -22,64 +22,38 @@ export type Options = typeof Options.Type
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/FileSystem/Search") {}
 
-const REFRESH_INTERVAL = Duration.toMillis("10 seconds")
-
 export const ripgrepLayer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const location = yield* Location.Service
     const ripgrep = yield* Ripgrep.Service
     const scope = yield* Scope.Scope
-    const clock = yield* Clock.Clock
+    const files: string[] = []
+    const directories = new Set<string>()
     const home = Protected.isHome(location.directory)
-    let index = { files: [] as string[], directories: new Set<string>() }
-    let initialized = false
-    let settledAt = Number.NEGATIVE_INFINITY
-    let refreshing = false
-    const scan = Effect.gen(function* () {
-      const next = { files: [] as string[], directories: new Set<string>() }
-      if (!initialized) index = next
-      yield* ripgrep.find({
+    yield* ripgrep
+      .find({
         cwd: location.directory,
         pattern: "*",
         limit: location.vcs && !home ? Number.MAX_SAFE_INTEGER : 100_000,
         exclude: home ? [...Protected.names()].map((name) => `${name}/**`) : undefined,
         onEntry: (entry) =>
           Effect.sync(() => {
-            next.files.push(entry.path)
+            files.push(entry.path)
             const parts = entry.path.split("/")
-            parts
-              .slice(0, -1)
-              .forEach((_, offset) => next.directories.add(parts.slice(0, offset + 1).join("/") + path.sep))
+            parts.slice(0, -1).forEach((_, index) => directories.add(parts.slice(0, index + 1).join("/") + path.sep))
           }),
       })
-      index = next
-      initialized = true
-    }).pipe(
-      Effect.orDie,
-      Effect.ensuring(
-        Effect.sync(() => {
-          settledAt = clock.currentTimeMillisUnsafe()
-          refreshing = false
-        }),
-      ),
-    )
-    const refresh = Effect.sync(() => {
-      if (refreshing || clock.currentTimeMillisUnsafe() < settledAt + REFRESH_INTERVAL) return
-      refreshing = true
-      return scan
-    }).pipe(Effect.flatMap((effect) => (effect ? effect.pipe(Effect.forkIn(scope)) : Effect.void)))
-    yield* refresh
+      .pipe(Effect.orDie, Effect.asVoid, Effect.forkIn(scope))
     return Service.of({
       find: (input) =>
         Effect.gen(function* () {
-          yield* refresh
           const items =
             input.type === "file"
-              ? index.files
+              ? files
               : input.type === "directory"
-                ? Array.from(index.directories)
-                : [...index.files, ...index.directories]
+                ? Array.from(directories)
+                : [...files, ...directories]
           return fuzzysort.go(input.query, items, { limit: input.limit ?? 50 }).map((item) => {
             const relative = item.target
             const type = relative.endsWith(path.sep) ? ("directory" as const) : ("file" as const)

packages/core/src/tool/plugin/websearch.ts

@@ -55,7 +55,7 @@ export const Plugin = {
               const search = (): Effect.Effect<Effect.Success<ReturnType<typeof ctx.websearch.query>>, unknown> =>
                 websearch.default().pipe(
                   Effect.flatMap((provider) => {
-                    if (!provider) return ctx.websearch.query(input)
+                    if (!provider || provider === WebSearch.AUTO) return ctx.websearch.query(input)
                     return context
                       .progress({ provider: provider.id })
                       .pipe(Effect.andThen(ctx.websearch.query({ ...input, providerID: provider.id })))
@@ -67,8 +67,7 @@ export const Plugin = {
                         Effect.gen(function* () {
                           if (yield* websearch.default()) return yield* Effect.void
                           const providers = (yield* ctx.websearch.providers()).data
-                          const defaultProvider = providers[0]
-                          if (!defaultProvider) return yield* new WebSearch.ProviderRequiredError()
+                          if (!providers.length) return yield* new WebSearch.ProviderRequiredError()
                           const response = yield* forms.ask({
                             sessionID: context.sessionID,
                             title: "Web Search",
@@ -83,11 +82,11 @@ export const Plugin = {
                                 options: [
                                   {
                                     value: "allow",
-                                    label: `Allow web search via ${defaultProvider.name}`,
+                                    label: "Allow web search",
                                   },
                                   {
                                     value: "choose",
-                                    label: "Choose another provider",
+                                    label: "Choose a specific provider",
                                   },
                                   { value: "disable", label: "Disable web search" },
                                 ],
@@ -123,10 +122,10 @@ export const Plugin = {
                               : undefined
                           if (selection?.status === "cancelled")
                             return yield* Effect.fail(new Error("Web search cancelled"))
-                          const providerID = selection?.answer.provider ?? defaultProvider.id
+                          const providerID = selection?.answer.provider ?? WebSearch.AUTO
                           if (
                             typeof providerID !== "string" ||
-                            !providers.some((provider) => provider.id === providerID)
+                            (providerID !== WebSearch.AUTO && !providers.some((provider) => provider.id === providerID))
                           )
                             return yield* new WebSearch.ProviderRequiredError()
                           return yield* kv.set("websearch:provider", providerID)

packages/core/src/websearch.ts

@@ -1,7 +1,7 @@
 export * as WebSearch from "./websearch.js"
 
 import { WebSearch } from "@opencode-ai/schema/websearch"
-import { Context, Effect, Layer, Schema } from "effect"
+import { Context, Effect, Layer, Random, Schema } from "effect"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { Bus } from "./bus.js"
 import { KV } from "./kv.js"
@@ -10,6 +10,8 @@ import { State } from "./state.js"
 export const ID = WebSearch.ID
 export type ID = WebSearch.ID
 
+export const AUTO = WebSearch.AUTO
+
 export const Provider = WebSearch.Provider
 export type Provider = WebSearch.Provider
 
@@ -52,7 +54,7 @@ export type Error = ProviderRequiredError | ProviderNotFoundError | DisabledErro
 
 export interface Interface extends State.Transformable<Draft> {
   readonly providers: () => Effect.Effect<readonly Provider[]>
-  readonly default: () => Effect.Effect<Provider | undefined, DisabledError>
+  readonly default: () => Effect.Effect<Provider | typeof AUTO | undefined, DisabledError>
   readonly query: (input: Input) => Effect.Effect<Response, Error>
 }
 
@@ -60,14 +62,14 @@ export class Service extends Context.Service<Service, Interface>()("@opencode/We
 
 type Data = {
   readonly providers: Map<ID, ProviderImplementation>
-  defaultProviderID?: ID
+  defaultProviderID?: WebSearch.Selection
 }
 
 export type Draft = {
   add: (provider: ProviderImplementation) => void
   default: {
-    get: () => ID | undefined
-    set: (providerID: ID) => void
+    get: () => WebSearch.Selection | undefined
+    set: (providerID: WebSearch.Selection) => void
   }
 }
 
@@ -96,11 +98,13 @@ const layer = Layer.effect(
 
     const defaultProvider = Effect.fn("WebSearch.default")(function* () {
       const data = state.get()
+      if (data.defaultProviderID === AUTO) return AUTO
       const configured = data.defaultProviderID ? data.providers.get(data.defaultProviderID) : undefined
       if (configured) return configured
       const stored = yield* kv.get("websearch:provider")
       if (stored === false) return yield* new DisabledError()
       if (typeof stored !== "string") return
+      if (stored === AUTO) return AUTO
       return data.providers.get(ID.make(stored))
     })
 
@@ -109,9 +113,21 @@ const layer = Layer.effect(
       if (input.providerID) return yield* requireProvider(providers, input.providerID)
       const provider = yield* defaultProvider()
       if (!provider) return yield* new ProviderRequiredError()
+      if (provider === AUTO) {
+        if (!providers.size) return yield* new ProviderRequiredError()
+        return yield* Random.shuffle(providers.values())
+      }
       return provider
     })
 
+    const execute = Effect.fn("WebSearch.execute")(function* (provider: ProviderImplementation, input: Input) {
+      const results = yield* provider.execute({ query: input.query }).pipe(
+        Effect.flatMap(decodeResults),
+        Effect.mapError((cause) => new RequestError({ providerID: provider.id, cause })),
+      )
+      return new Response({ providerID: provider.id, results })
+    })
+
     return Service.of({
       transform: state.transform,
       reload: state.reload,
@@ -123,15 +139,13 @@ const layer = Layer.effect(
       }),
       default: Effect.fn("WebSearch.defaultInfo")(function* () {
         const provider = yield* defaultProvider()
+        if (provider === AUTO) return AUTO
         return provider && { id: provider.id, name: provider.name }
       }),
       query: Effect.fn("WebSearch.query")(function* (input) {
-        const provider = yield* resolve(input)
-        const results = yield* provider.execute({ query: input.query }).pipe(
-          Effect.flatMap(decodeResults),
-          Effect.mapError((cause) => new RequestError({ providerID: provider.id, cause })),
-        )
-        return new Response({ providerID: provider.id, results })
+        const route = yield* resolve(input)
+        if (Array.isArray(route)) return yield* Effect.firstSuccessOf(route.map((provider) => execute(provider, input)))
+        return yield* execute(route, input)
       }),
     })
   }),

packages/core/test/filesystem/search.test.ts

@@ -1,8 +1,7 @@
 import { describe, expect, test } from "bun:test"
 import os from "os"
 import path from "path"
-import { Deferred, Effect, Layer } from "effect"
-import { TestClock } from "effect/testing"
+import { Effect, Layer } from "effect"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { FileSystem } from "@opencode-ai/core/filesystem"
 import { Protected } from "@opencode-ai/core/filesystem/protected"
@@ -57,70 +56,4 @@ describe("FileSystemSearch", () => {
       }).pipe(Effect.provide(layer), Effect.scoped),
     )
   })
-
-  test("refreshes a stale ripgrep index atomically without blocking search", async () => {
-    let scans = 0
-    const initial = Effect.runSync(Deferred.make<void>())
-    const started = Effect.runSync(Deferred.make<void>())
-    const release = Effect.runSync(Deferred.make<void>())
-    const layer = AppNodeBuilder.build(FileSystemSearch.node, [
-      [
-        Location.node,
-        Layer.succeed(
-          Location.Service,
-          Location.Service.of(
-            location({ directory: AbsolutePath.make(path.join(os.tmpdir(), "opencode-search-atomic")) }),
-          ),
-        ),
-      ],
-      [
-        Ripgrep.node,
-        Layer.succeed(
-          Ripgrep.Service,
-          Ripgrep.Service.of({
-            find: (input) =>
-              Effect.gen(function* () {
-                scans++
-                if (scans > 1) {
-                  yield* Deferred.succeed(started, undefined)
-                  yield* Deferred.await(release)
-                }
-                const entry = FileSystem.Entry.make({
-                  path: RelativePath.make(scans === 1 ? "src/old.ts" : "src/new.ts"),
-                  type: "file",
-                })
-                if (input.onEntry) yield* input.onEntry(entry)
-                if (scans === 1) yield* Deferred.succeed(initial, undefined)
-                return [entry]
-              }),
-            glob: () => Effect.succeed([]),
-            grep: () => Effect.succeed([]),
-          }),
-        ),
-      ],
-    ])
-
-    await Effect.runPromise(
-      Effect.gen(function* () {
-        const search = yield* FileSystemSearch.Service
-        yield* Deferred.await(initial)
-        expect((yield* search.find({ query: "old", type: "file" }))[0]?.path).toBe(RelativePath.make("src/old.ts"))
-        expect(scans).toBe(1)
-
-        yield* TestClock.adjust("10 seconds")
-        yield* search.find({ query: "old", type: "file" })
-        yield* Deferred.await(started)
-
-        expect((yield* search.find({ query: "old", type: "file" }))[0]?.path).toBe(RelativePath.make("src/old.ts"))
-        expect(scans).toBe(2)
-        yield* Deferred.succeed(release, undefined)
-        const refreshed = yield* Effect.gen(function* () {
-          yield* Effect.yieldNow
-          return yield* search.find({ query: "new", type: "file" })
-        }).pipe(Effect.repeat({ until: (entries) => entries.length > 0 }))
-        expect(refreshed[0]?.path).toBe(RelativePath.make("src/new.ts"))
-        expect(scans).toBe(2)
-      }).pipe(Effect.provide(layer), Effect.provide(TestClock.layer()), Effect.scoped),
-    )
-  })
 })

packages/core/test/tool-websearch.test.ts

@@ -80,6 +80,7 @@ const websearch = Layer.succeed(
       Effect.gen(function* () {
         const stored = values.get("websearch:provider")
         if (stored === false) return yield* new WebSearch.DisabledError()
+        if (stored === WebSearch.AUTO) return WebSearch.AUTO
         return typeof stored === "string" ? providers.find((provider) => provider.id === stored) : undefined
       }),
     query: (input) =>
@@ -93,6 +94,7 @@ const websearch = Layer.succeed(
         }
         if (queryError) return yield* queryError
         if (providerRequired && typeof stored !== "string") return yield* new WebSearch.ProviderRequiredError()
+        if (stored === WebSearch.AUTO) return result
         if (typeof stored === "string")
           return new WebSearch.Response({ providerID: WebSearch.ID.make(stored), results: result.results })
         return result
@@ -234,7 +236,7 @@ describe("WebSearchTool registration", () => {
     }),
   )
 
-  it.effect("asks once and uses the default provider when web search is first enabled", () =>
+  it.effect("asks once and enables automatic provider selection", () =>
     Effect.gen(function* () {
       providerRequired = true
       formResponse = { status: "answered", answer: { choice: "allow" } }
@@ -247,7 +249,7 @@ describe("WebSearchTool registration", () => {
           call: { type: "tool-call", id: "call-enable", name: "websearch", input: { query: "effect" } },
         }),
       ).toMatchObject({ status: "completed", metadata: { provider: "exa" } })
-      expect(values.get("websearch:provider")).toBe("exa")
+      expect(values.get("websearch:provider")).toBe(WebSearch.AUTO)
       expect(queries).toHaveLength(2)
       expect(formRequests).toEqual([
         {
@@ -264,11 +266,11 @@ describe("WebSearchTool registration", () => {
               options: [
                 {
                   value: "allow",
-                  label: "Allow web search via Exa",
+                  label: "Allow web search",
                 },
                 {
                   value: "choose",
-                  label: "Choose another provider",
+                  label: "Choose a specific provider",
                 },
                 { value: "disable", label: "Disable web search" },
               ],
@@ -353,7 +355,7 @@ describe("WebSearchTool registration", () => {
 
       expect(results.every((item) => item.status === "completed")).toBe(true)
       expect(formRequests).toHaveLength(1)
-      expect(values.get("websearch:provider")).toBe("exa")
+      expect(values.get("websearch:provider")).toBe(WebSearch.AUTO)
     }),
   )
 

packages/core/test/websearch.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect } from "bun:test"
-import { Effect, Exit, Scope } from "effect"
+import { Effect, Exit, Random, Scope } from "effect"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { Bus } from "@opencode-ai/core/bus"
@@ -9,7 +9,7 @@ import { testEffect } from "./lib/effect"
 
 const it = testEffect(AppNodeBuilder.build(LayerNode.group([WebSearch.node, Bus.node, KV.node])))
 
-const register = (id: string) =>
+const register = (id: string, behavior: "results" | "empty" | "fail" = "results") =>
   Effect.gen(function* () {
     const websearch = yield* WebSearch.Service
     const providerID = WebSearch.ID.make(id)
@@ -19,17 +19,24 @@ const register = (id: string) =>
         id: providerID,
         name: id.toUpperCase(),
         execute: (input) =>
-          Effect.sync(() => {
-            calls.push(input)
-            return [
-              {
-                url: `https://${id}.example.com`,
-                title: input.query,
-                content: `${id}: ${input.query}`,
-                time: {},
-              },
-            ]
-          }),
+          Effect.sync(() => calls.push(input)).pipe(
+            Effect.andThen(
+              behavior === "fail"
+                ? Effect.fail(new Error(`${id} failed`))
+                : Effect.succeed(
+                    behavior === "empty"
+                      ? []
+                      : [
+                          {
+                            url: `https://${id}.example.com`,
+                            title: input.query,
+                            content: `${id}: ${input.query}`,
+                            time: {},
+                          },
+                        ],
+                  ),
+            ),
+          ),
       })
     })
     return { providerID, calls }
@@ -60,6 +67,21 @@ describe("WebSearch", () => {
     }),
   )
 
+  it.effect("keeps explicit providers strict when automatic selection is enabled", () =>
+    Effect.gen(function* () {
+      const exa = yield* register("exa", "fail")
+      const parallel = yield* register("parallel")
+      const websearch = yield* WebSearch.Service
+      yield* websearch.transform((draft) => draft.default.set(WebSearch.AUTO))
+
+      const error = yield* websearch.query({ query: "strict", providerID: exa.providerID }).pipe(Effect.flip)
+
+      expect(error).toMatchObject({ _tag: "WebSearch.Request", providerID: exa.providerID })
+      expect(exa.calls).toEqual([{ query: "strict" }])
+      expect(parallel.calls).toEqual([])
+    }),
+  )
+
   it.effect("requires a provider when no default is set", () =>
     Effect.gen(function* () {
       yield* register("exa")
@@ -81,6 +103,20 @@ describe("WebSearch", () => {
     }),
   )
 
+  it.effect("keeps fixed configured providers strict", () =>
+    Effect.gen(function* () {
+      const exa = yield* register("exa", "fail")
+      const parallel = yield* register("parallel")
+      const websearch = yield* WebSearch.Service
+      yield* websearch.transform((draft) => draft.default.set(exa.providerID))
+
+      const error = yield* websearch.query({ query: "configured" }).pipe(Effect.flip)
+
+      expect(error).toMatchObject({ _tag: "WebSearch.Request", providerID: exa.providerID })
+      expect(parallel.calls).toEqual([])
+    }),
+  )
+
   it.effect("uses the provider stored in KV", () =>
     Effect.gen(function* () {
       yield* register("exa")
@@ -94,6 +130,118 @@ describe("WebSearch", () => {
     }),
   )
 
+  it.effect("keeps fixed KV providers strict", () =>
+    Effect.gen(function* () {
+      const exa = yield* register("exa", "fail")
+      const parallel = yield* register("parallel")
+      const websearch = yield* WebSearch.Service
+      const kv = yield* KV.Service
+      yield* kv.set("websearch:provider", exa.providerID)
+
+      const error = yield* websearch.query({ query: "fixed" }).pipe(Effect.flip)
+
+      expect(error).toMatchObject({ _tag: "WebSearch.Request", providerID: exa.providerID })
+      expect(parallel.calls).toEqual([])
+      yield* kv.remove("websearch:provider")
+    }),
+  )
+
+  it.effect("automatically tries each provider at most once until one succeeds", () =>
+    Effect.gen(function* () {
+      const order = yield* Random.shuffle(["exa", "parallel", "firecrawl"]).pipe(Random.withSeed("fallback"))
+      const registered = yield* Effect.forEach(["exa", "parallel", "firecrawl"], (id) =>
+        register(id, id === order.at(-1) ? "results" : "fail"),
+      )
+      const websearch = yield* WebSearch.Service
+      const kv = yield* KV.Service
+      yield* kv.set("websearch:provider", WebSearch.AUTO)
+
+      const response = yield* websearch.query({ query: "automatic" }).pipe(Random.withSeed("fallback"))
+
+      expect(response.providerID).toBe(WebSearch.ID.make(order.at(-1)!))
+      expect(registered.flatMap((provider) => provider.calls)).toHaveLength(3)
+      expect(registered.every((provider) => provider.calls.length === 1)).toBe(true)
+      yield* kv.remove("websearch:provider")
+    }),
+  )
+
+  it.effect("stops automatic fallback on empty results", () =>
+    Effect.gen(function* () {
+      const empty = yield* register("empty", "empty")
+      const fallback = yield* register("fallback")
+      const websearch = yield* WebSearch.Service
+      yield* websearch.transform((draft) => draft.default.set(WebSearch.AUTO))
+
+      const response = yield* websearch.query({ query: "empty" }).pipe(Random.withSeed("empty-first"))
+
+      expect(response.results).toEqual([])
+      expect(empty.calls).toHaveLength(1)
+      expect(fallback.calls).toHaveLength(0)
+    }),
+  )
+
+  it.effect("returns the final request error when every automatic provider fails", () =>
+    Effect.gen(function* () {
+      const exa = yield* register("exa", "fail")
+      const parallel = yield* register("parallel", "fail")
+      const websearch = yield* WebSearch.Service
+      yield* websearch.transform((draft) => draft.default.set(WebSearch.AUTO))
+      const expected = yield* Random.shuffle([exa.providerID, parallel.providerID]).pipe(Random.withSeed("all-fail"))
+
+      const error = yield* websearch.query({ query: "failure" }).pipe(Random.withSeed("all-fail"), Effect.flip)
+
+      expect(error).toMatchObject({ _tag: "WebSearch.Request", providerID: expected.at(-1) })
+      expect(exa.calls).toHaveLength(1)
+      expect(parallel.calls).toHaveLength(1)
+    }),
+  )
+
+  it.effect("supports zero and one registered provider in automatic mode", () =>
+    Effect.gen(function* () {
+      const websearch = yield* WebSearch.Service
+      yield* websearch.transform((draft) => draft.default.set(WebSearch.AUTO))
+      expect((yield* websearch.query({ query: "zero" }).pipe(Effect.flip))._tag).toBe("WebSearch.ProviderRequired")
+
+      const only = yield* register("only")
+      expect((yield* websearch.query({ query: "one" })).providerID).toBe(only.providerID)
+      expect(only.calls).toHaveLength(1)
+    }),
+  )
+
+  it.effect("lets an automatic configured default override a fixed KV provider", () =>
+    Effect.gen(function* () {
+      const fixed = yield* register("fixed", "fail")
+      const fallback = yield* register("fallback")
+      const websearch = yield* WebSearch.Service
+      const kv = yield* KV.Service
+      yield* kv.set("websearch:provider", fixed.providerID)
+      yield* websearch.transform((draft) => draft.default.set(WebSearch.AUTO))
+
+      expect((yield* websearch.query({ query: "config" })).providerID).toBe(fallback.providerID)
+      expect(fixed.calls.length).toBeLessThanOrEqual(1)
+      expect(fallback.calls).toHaveLength(1)
+      yield* kv.remove("websearch:provider")
+    }),
+  )
+
+  it.effect("can start automatic selection with any registered provider", () =>
+    Effect.gen(function* () {
+      const exa = yield* register("exa")
+      const parallel = yield* register("parallel")
+      const websearch = yield* WebSearch.Service
+      yield* websearch.transform((draft) => draft.default.set(WebSearch.AUTO))
+
+      const selected = yield* Effect.forEach(["a", "b", "c", "d", "e", "f"], (seed) =>
+        websearch.query({ query: seed }).pipe(
+          Random.withSeed(seed),
+          Effect.map((response) => response.providerID),
+        ),
+      )
+
+      expect(new Set(selected)).toEqual(new Set([exa.providerID, parallel.providerID]))
+    }),
+  )
+
   it.effect("fails when web search is explicitly disabled", () =>
     Effect.gen(function* () {
       yield* register("exa")

packages/schema/src/config/websearch.ts

@@ -4,5 +4,5 @@ import { Schema } from "effect"
 import { WebSearch } from "../websearch.js"
 
 export class Info extends Schema.Class<Info>("ConfigWebSearch.Info")({
-  provider: WebSearch.ID,
+  provider: WebSearch.Selection,
 }) {}

packages/schema/src/websearch.ts

@@ -7,6 +7,11 @@ import { optional } from "./schema.js"
 export const ID = Schema.String.pipe(Schema.brand("WebSearch.ID"))
 export type ID = typeof ID.Type
 
+export const AUTO = "auto" as const
+
+export const Selection = Schema.Union([Schema.Literal(AUTO), ID])
+export type Selection = typeof Selection.Type
+
 export interface Provider extends Schema.Schema.Type<typeof Provider> {}
 export const Provider = Schema.Struct({
   id: ID,

packages/schema/test/config.test.ts

@@ -6,8 +6,14 @@ import { ConfigMCP } from "../src/config/mcp.js"
 import { ConfigProvider } from "../src/config/provider.js"
 import { Mcp } from "../src/mcp.js"
 import { AbsolutePath } from "../src/schema.js"
+import { WebSearch } from "../src/websearch.js"
 
 describe("Config.Entry", () => {
+  test("accepts automatic web search provider selection", () => {
+    const config = new Config.Info({ websearch: { provider: WebSearch.AUTO } })
+    expect(config.websearch?.provider).toBe(WebSearch.AUTO)
+  })
+
   test("round-trips every configuration entry type", () => {
     const entries = [
       new Config.Document({

packages/tui/src/component/dialog-experiments.tsx

@@ -1,11 +1,10 @@
 import { createMemo, createSignal } from "solid-js"
 import { useConfig } from "../config"
 import { DialogSelect } from "../ui/dialog-select"
-import { useTheme } from "../context/theme"
 import { useToast } from "../ui/toast"
 
 type Experiment = {
-  id: string
+  id: "tab_drafts"
   title: string
   description: string
 }
@@ -13,30 +12,36 @@ type Experiment = {
 // In-flight features anyone can opt into. Each entry is temporary: an
 // experiment either graduates (delete the entry, make the behavior
 // unconditional) or dies (delete the entry and the branch it gated).
-export const experiments: Experiment[] = []
+export const experiments: Experiment[] = [
+  {
+    id: "tab_drafts",
+    title: "Per-tab prompt drafts",
+    description: "Keep unsent prompt drafts on the tab where they were written. New sessions start blank.",
+  },
+]
 
 export function DialogExperiments() {
   const config = useConfig()
-  const theme = useTheme()
   const toast = useToast()
-  const [selected, setSelected] = createSignal<Experiment>()
+  const [selected, setSelected] = createSignal(0)
   const [saving, setSaving] = createSignal(false)
 
   const enabled = (experiment: Experiment) => config.data.experimental?.[experiment.id] === true
 
   const options = createMemo(() =>
-    experiments.map((experiment) => ({
+    experiments.map((experiment, index) => ({
       title: experiment.title,
       category: "Experiments",
       searchText: experiment.description,
       footer: enabled(experiment) ? "on" : "off",
-      value: experiment,
+      value: index,
     })),
   )
 
   // All experiments are booleans, so either direction toggles.
-  async function change(experiment = selected()) {
+  async function change(index = selected()) {
     if (saving()) return
+    const experiment = experiments[index]
     if (!experiment) return
     const next = !enabled(experiment)
     setSaving(true)
@@ -53,33 +58,23 @@ export function DialogExperiments() {
     <DialogSelect
       title="Experiments"
       options={options()}
-      renderFilter={experiments.length > 0}
       onMove={(option) => setSelected(option.value)}
       onSelect={(option) => void change(option.value)}
-      emptyView={
-        <box paddingLeft={4} paddingRight={4}>
-          <text fg={theme.text.subdued}>No experiments available</text>
-        </box>
-      }
-      footerHints={experiments.length > 0 ? [{ title: "←/→", label: "change" }] : []}
-      bindings={
-        experiments.length > 0
-          ? [
-              {
-                bind: "left",
-                title: "Previous value",
-                group: "Experiments",
-                run: () => void change(),
-              },
-              {
-                bind: "right",
-                title: "Next value",
-                group: "Experiments",
-                run: () => void change(),
-              },
-            ]
-          : []
-      }
+      footerHints={[{ title: "←/→", label: "change" }]}
+      bindings={[
+        {
+          bind: "left",
+          title: "Previous value",
+          group: "Experiments",
+          run: () => void change(),
+        },
+        {
+          bind: "right",
+          title: "Next value",
+          group: "Experiments",
+          run: () => void change(),
+        },
+      ]}
     />
   )
 }

packages/tui/src/component/prompt/draft-stash.ts

@@ -1,18 +1,30 @@
 import type { PromptInfo } from "../../prompt/history"
 
-// Holds one in-progress draft per tab across Prompt remounts. A draft is
-// consumed on take: restoring it moves it out of the stash, so a stale copy
-// never shadows newer input.
+// Holds one in-progress draft per slot across Prompt remounts. The undefined
+// key is the default single global slot that follows focus across tabs; the
+// tab_drafts experiment keys drafts by the tab (sessionID or "home") they
+// were written in. A draft is consumed on take: restoring it moves it out of
+// the stash, so a stale copy never shadows newer input.
 export type DraftEntry = { prompt: PromptInfo; cursor: number }
 
-const byTab = new Map<string | undefined, DraftEntry>()
+let global: DraftEntry | undefined
+const byTab = new Map<string, DraftEntry>()
 
-export function takeDraft(sessionID: string | undefined) {
-  const entry = byTab.get(sessionID)
-  byTab.delete(sessionID)
+export function takeDraft(key: string | undefined) {
+  if (key === undefined) {
+    const entry = global
+    global = undefined
+    return entry
+  }
+  const entry = byTab.get(key)
+  byTab.delete(key)
   return entry
 }
 
-export function saveDraft(sessionID: string | undefined, entry: DraftEntry) {
-  byTab.set(sessionID, entry)
+export function saveDraft(key: string | undefined, entry: DraftEntry) {
+  if (key === undefined) {
+    global = entry
+    return
+  }
+  byTab.set(key, entry)
 }

packages/tui/src/component/prompt/index.tsx

@@ -678,9 +678,10 @@ export function Prompt(props: PromptProps) {
   // instance belongs to exactly one tab. Reading props.sessionID lazily would
   // observe the *next* route during onCleanup and stash under the wrong tab.
   const stashSessionID = props.sessionID
+  const stashKey = () => (config.experimental?.tab_drafts === true ? (stashSessionID ?? "home") : undefined)
 
   onMount(() => {
-    const saved = takeDraft(stashSessionID)
+    const saved = takeDraft(stashKey())
     if (store.prompt.text) return
     if (saved && saved.prompt.text) {
       input.setText(saved.prompt.text)
@@ -693,7 +694,7 @@ export function Prompt(props: PromptProps) {
   onCleanup(() => {
     disposed = true
     if (store.prompt.text) {
-      saveDraft(stashSessionID, { prompt: unwrap(store.prompt), cursor: input.cursorOffset })
+      saveDraft(stashKey(), { prompt: unwrap(store.prompt), cursor: input.cursorOffset })
     }
     setInputTarget(undefined)
     props.ref?.(undefined)

packages/tui/src/config/index.tsx

@@ -192,9 +192,13 @@ export const Info = Schema.Struct({
       }),
     }),
   ).annotate({ description: "Debugging settings" }),
-  experimental: Schema.optional(Schema.Record(Schema.String, Schema.Boolean)).annotate({
-    description: "Experimental features that may change or be removed at any time",
-  }),
+  experimental: Schema.optional(
+    Schema.Struct({
+      tab_drafts: Schema.optional(Schema.Boolean).annotate({
+        description: "Keep unsent prompt drafts on the tab where they were written",
+      }),
+    }),
+  ).annotate({ description: "Experimental features that may change or be removed at any time" }),
   animations: Schema.optional(Schema.Boolean).annotate({ description: "Enable interface animations" }),
   mouse: Schema.optional(Schema.Boolean).annotate({ description: "Enable terminal mouse capture" }),
   cursor: Schema.optional(Cursor),

packages/tui/test/prompt/draft-stash.test.ts

@@ -3,13 +3,23 @@ import { saveDraft, takeDraft } from "../../src/component/prompt/draft-stash"
 import { emptyPrompt } from "../../src/prompt/history"
 
 // The Prompt component stashes an unsent draft in onCleanup and takes it back
-// in onMount across route remounts, keyed by sessionID or undefined for home.
+// in onMount across route remounts. The key it uses is undefined by default
+// (one global slot that follows focus across tabs) and the tab identity
+// (sessionID, or "home") when the tab_drafts experiment is on.
 
 function draft(text: string, cursor = text.length) {
   return { prompt: { ...emptyPrompt(), text }, cursor }
 }
 
 describe("prompt draft stash", () => {
+  test("global slot follows focus: any tab takes the last stashed draft", () => {
+    const entry = draft("follow me")
+    saveDraft(undefined, entry)
+    expect(takeDraft(undefined)).toBe(entry)
+    // Consumed on take, so a remount never restores a stale copy.
+    expect(takeDraft(undefined)).toBeUndefined()
+  })
+
   test("tab-keyed drafts stay on the tab they were written in", () => {
     const two = draft("notes for session two")
     saveDraft("ses_two", two)
@@ -27,12 +37,25 @@ describe("prompt draft stash", () => {
     const one = draft("DRAFT-ONE")
     const home = draft("draft on home")
     saveDraft("ses_one", one)
-    saveDraft(undefined, home)
+    saveDraft("home", home)
 
-    expect(takeDraft(undefined)).toBe(home)
+    expect(takeDraft("home")).toBe(home)
     expect(takeDraft("ses_one")).toBe(one)
   })
 
+  test("global and tab slots never leak into each other when the experiment toggles mid-draft", () => {
+    const global = draft("stashed before enabling tab_drafts")
+    const keyed = draft("stashed after enabling tab_drafts")
+    saveDraft(undefined, global)
+    saveDraft("ses_a", keyed)
+
+    // A keyed lookup must not surface the global draft on the wrong tab...
+    expect(takeDraft("ses_b")).toBeUndefined()
+    // ...and the global slot must not surface a tab's draft.
+    expect(takeDraft(undefined)).toBe(global)
+    expect(takeDraft("ses_a")).toBe(keyed)
+  })
+
   test("a newer draft for the same slot replaces the older one", () => {
     saveDraft("ses_a", draft("first"))
     const second = draft("second")

packages/web/src/content/docs/go.mdx

@@ -197,7 +197,7 @@ You can also access Go models through the following API endpoints.
 
 | Model             | Model ID          | Endpoint                                         | AI SDK Package              |
 | ----------------- | ----------------- | ------------------------------------------------ | --------------------------- |
-| Grok 4.5          | grok-4.5          | `https://opencode.ai/zen/go/v1/responses`        | `@ai-sdk/openai`            |
+| Grok 4.5          | grok-4.5          | `https://opencode.ai/zen/go/v1/chat/completions` | `@ai-sdk/openai-compatible` |
 | GPT 5.6 Luna      | gpt-5.6-luna      | `https://opencode.ai/zen/go/v1/responses`        | `@ai-sdk/openai`            |
 | GLM-5.2           | glm-5.2           | `https://opencode.ai/zen/go/v1/chat/completions` | `@ai-sdk/openai-compatible` |
 | GLM-5.1           | glm-5.1           | `https://opencode.ai/zen/go/v1/chat/completions` | `@ai-sdk/openai-compatible` |