fix(storage): type not found errors (#27265)

packages/opencode/src/server/routes/instance/httpapi/handlers/session-errors.ts

@@ -2,8 +2,6 @@ import type { NotFoundError as StorageNotFoundError } from "@/storage/storage"
 import { Effect } from "effect"
 import * as ApiError from "../errors"
 
-type StorageNotFound = InstanceType<typeof StorageNotFoundError>
-
-export function mapStorageNotFound<A, R>(self: Effect.Effect<A, StorageNotFound, R>) {
-  return self.pipe(Effect.mapError((error) => ApiError.notFound(error.data.message)))
+export function mapStorageNotFound<A, R>(self: Effect.Effect<A, StorageNotFoundError, R>) {
+  return self.pipe(Effect.mapError((error) => ApiError.notFound(error.message)))
 }

packages/opencode/src/server/routes/instance/httpapi/middleware/error.ts

@@ -24,11 +24,14 @@ export const errorLayer = HttpRouter.middleware<{ handles: unknown }>()((effect)
       const error = defect.defect
       log.error("failed", { error, cause: Cause.pretty(cause) })
 
+      if (error instanceof NotFoundError) {
+        return Effect.succeed(HttpServerResponse.jsonUnsafe(error.toObject(), { status: 404 }))
+      }
+
       if (error instanceof NamedError) {
         return Effect.succeed(
           HttpServerResponse.jsonUnsafe(error.toObject(), {
             status: iife(() => {
-              if (error instanceof NotFoundError) return 404
               if (error instanceof Provider.ModelNotFoundError) return 400
               if (error.name === "ProviderAuthValidationFailed") return 400
               if (error.name.startsWith("Worktree")) return 400

packages/opencode/src/session/session.ts

@@ -448,7 +448,7 @@ export class BusyError extends Error {
   }
 }
 
-export type NotFound = InstanceType<typeof NotFoundError>
+export type NotFound = NotFoundError
 
 export interface Interface {
   readonly list: (input?: ListInput) => Effect.Effect<Info[]>

packages/opencode/src/storage/storage.ts

@@ -1,7 +1,6 @@
 import * as Log from "@opencode-ai/core/util/log"
 import path from "path"
 import { Global } from "@opencode-ai/core/global"
-import { NamedError } from "@opencode-ai/core/util/error"
 import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { Effect, Exit, Layer, Option, RcMap, Schema, Context, TxReentrantLock } from "effect"
 import { NonNegativeInt } from "@opencode-ai/core/schema"
@@ -15,11 +14,22 @@ type Migration = (
   git: Git.Interface,
 ) => Effect.Effect<void, AppFileSystem.Error>
 
-export const NotFoundError = NamedError.create("NotFoundError", {
+export class NotFoundError extends Schema.TaggedErrorClass<NotFoundError>()("NotFoundError", {
   message: Schema.String,
-})
+}) {
+  static isInstance(input: unknown): input is NotFoundError {
+    return input instanceof NotFoundError
+  }
 
-export type Error = AppFileSystem.Error | InstanceType<typeof NotFoundError>
+  toObject() {
+    return {
+      name: "NotFoundError" as const,
+      data: { message: this.message },
+    }
+  }
+}
+
+export type Error = AppFileSystem.Error | NotFoundError
 
 const RootFile = Schema.Struct({
   path: Schema.optional(
@@ -245,7 +255,7 @@ export const layer = Layer.effect(
       }),
     )
 
-    const fail = (target: string): Effect.Effect<never, InstanceType<typeof NotFoundError>> =>
+    const fail = (target: string): Effect.Effect<never, NotFoundError> =>
       Effect.fail(new NotFoundError({ message: `Resource not found: ${target}` }))
 
     const wrap = <A>(target: string, body: Effect.Effect<A, AppFileSystem.Error>) =>

packages/opencode/test/session/messages-pagination.test.ts

@@ -4,6 +4,7 @@ import { Session as SessionNs } from "@/session/session"
 import { MessageV2 } from "../../src/session/message-v2"
 import { MessageID, PartID, type SessionID } from "../../src/session/schema"
 import { ModelID, ProviderID } from "../../src/provider/schema"
+import { NotFoundError } from "@/storage/storage"
 import * as Log from "@opencode-ai/core/util/log"
 import { testEffect } from "../lib/effect"
 
@@ -11,6 +12,20 @@ void Log.init({ print: false })
 
 const it = testEffect(SessionNs.defaultLayer)
 
+function expectNotFound(fn: () => unknown, message: string) {
+  let thrown: unknown
+  try {
+    fn()
+  } catch (error) {
+    thrown = error
+  }
+  expect(thrown).toBeInstanceOf(NotFoundError)
+  if (thrown instanceof NotFoundError) {
+    expect(thrown._tag).toBe("NotFoundError")
+    expect(thrown.message).toBe(message)
+  }
+}
+
 const withSession = <A, E, R>(
   fn: (input: { session: SessionNs.Interface; sessionID: SessionID }) => Effect.Effect<A, E, R>,
 ) =>
@@ -186,7 +201,7 @@ describe("MessageV2.page", () => {
   it.instance("throws NotFoundError for non-existent session", () =>
     Effect.gen(function* () {
       const fake = "non-existent-session" as SessionID
-      expect(() => MessageV2.page({ sessionID: fake, limit: 10 })).toThrow("NotFoundError")
+      expectNotFound(() => MessageV2.page({ sessionID: fake, limit: 10 }), `Session not found: ${fake}`)
     }),
   )
 
@@ -471,7 +486,8 @@ describe("MessageV2.get", () => {
   it.instance("throws NotFoundError for non-existent message", () =>
     withSession(({ sessionID }) =>
       Effect.gen(function* () {
-        expect(() => MessageV2.get({ sessionID, messageID: MessageID.ascending() })).toThrow("NotFoundError")
+        const messageID = MessageID.ascending()
+        expectNotFound(() => MessageV2.get({ sessionID, messageID }), `Message not found: ${messageID}`)
       }),
     ),
   )
@@ -483,7 +499,7 @@ describe("MessageV2.get", () => {
       const b = yield* session.create({})
       const [id] = yield* fill(a.id, 1)
 
-      expect(() => MessageV2.get({ sessionID: b.id, messageID: id })).toThrow("NotFoundError")
+      expectNotFound(() => MessageV2.get({ sessionID: b.id, messageID: id }), `Message not found: ${id}`)
       const result = MessageV2.get({ sessionID: a.id, messageID: id })
       expect(result.info.id).toBe(id)
 

packages/opencode/test/storage/storage.test.ts

@@ -74,20 +74,23 @@ describe("Storage", () => {
   it.live("maps missing reads to NotFoundError", () =>
     Effect.gen(function* () {
       const { root, svc } = yield* scope()
-      const exit = yield* svc.read([...root, "missing", "value"]).pipe(Effect.exit)
-      expect(Exit.isFailure(exit)).toBe(true)
+      const error = yield* Effect.flip(svc.read([...root, "missing", "value"]))
+      expect(error).toBeInstanceOf(Storage.NotFoundError)
+      expect(error._tag).toBe("NotFoundError")
+      expect(error.message).toContain(path.join(...root, "missing", "value") + ".json")
     }),
   )
 
   it.live("update on missing key throws NotFoundError", () =>
     Effect.gen(function* () {
       const { root, svc } = yield* scope()
-      const exit = yield* svc
-        .update<{ value: number }>([...root, "missing", "key"], (draft) => {
+      const error = yield* Effect.flip(
+        svc.update<{ value: number }>([...root, "missing", "key"], (draft) => {
           draft.value += 1
-        })
-        .pipe(Effect.exit)
-      expect(Exit.isFailure(exit)).toBe(true)
+        }),
+      )
+      expect(error).toBeInstanceOf(Storage.NotFoundError)
+      expect(error._tag).toBe("NotFoundError")
     }),
   )