fix(core): tolerate missing workspace names

packages/core/src/database/migration/20260410174513_workspace-name.ts

@@ -5,6 +5,9 @@ export default {
   id: "20260410174513_workspace-name",
   up(tx) {
     return Effect.gen(function* () {
+      const columns = yield* tx.all<{ name: string }>(`PRAGMA table_info(\`workspace\`)`)
+      const name = columns.some((column) => column.name === "name") ? "`name`" : "''"
+
       yield* tx.run(`PRAGMA foreign_keys=OFF;`)
       yield* tx.run(`
         CREATE TABLE \`__new_workspace\` (
@@ -19,7 +22,7 @@ export default {
         );
       `)
       yield* tx.run(
-        `INSERT INTO \`__new_workspace\`(\`id\`, \`type\`, \`branch\`, \`name\`, \`directory\`, \`extra\`, \`project_id\`) SELECT \`id\`, \`type\`, \`branch\`, \`name\`, \`directory\`, \`extra\`, \`project_id\` FROM \`workspace\`;`,
+        `INSERT INTO \`__new_workspace\`(\`id\`, \`type\`, \`branch\`, \`name\`, \`directory\`, \`extra\`, \`project_id\`) SELECT \`id\`, \`type\`, \`branch\`, ${name}, \`directory\`, \`extra\`, \`project_id\` FROM \`workspace\`;`,
       )
       yield* tx.run(`DROP TABLE \`workspace\`;`)
       yield* tx.run(`ALTER TABLE \`__new_workspace\` RENAME TO \`workspace\`;`)

packages/core/test/database-migration.test.ts

@@ -8,6 +8,7 @@ import { Effect, Layer } from "effect"
 import { eq, inArray, sql } from "drizzle-orm"
 import { DatabaseMigration } from "@opencode-ai/core/database/migration"
 import { migrations } from "@opencode-ai/core/database/migration.gen"
+import workspaceNameMigration from "@opencode-ai/core/database/migration/20260410174513_workspace-name"
 import sessionUsageMigration from "@opencode-ai/core/database/migration/20260510033149_session_usage"
 import normalizeStoragePathsMigration from "@opencode-ai/core/database/migration/20260601010001_normalize_storage_paths"
 import sessionMessageProjectionOrderMigration from "@opencode-ai/core/database/migration/20260603040000_session_message_projection_order"
@@ -319,6 +320,37 @@ describe("DatabaseMigration", () => {
     )
   })
 
+  test("defaults missing workspace names during legacy workspace rebuild", async () => {
+    await run(
+      Effect.gen(function* () {
+        const db = yield* makeDb
+        yield* db.run(sql`
+          CREATE TABLE workspace (
+            id text PRIMARY KEY,
+            type text NOT NULL,
+            branch text,
+            directory text,
+            extra text,
+            project_id text NOT NULL
+          )
+        `)
+        yield* db.run(sql`
+          INSERT INTO workspace (id, type, branch, directory, extra, project_id)
+          VALUES ('wrk_legacy', 'remote', 'main', '/repo', '{}', 'proj_legacy')
+        `)
+
+        yield* DatabaseMigration.applyOnly(db, [workspaceNameMigration])
+
+        expect(yield* db.get(sql`SELECT id, name, directory, extra FROM workspace`)).toEqual({
+          id: "wrk_legacy",
+          name: "",
+          directory: "/repo",
+          extra: "{}",
+        })
+      }),
+    )
+  })
+
   test("resets incompatible projected Session messages before adding sequence order", async () => {
     await run(
       Effect.gen(function* () {