fix(session): make message reads effectful (#27291)

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

@@ -105,7 +105,7 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
       }
 
       const page = yield* SessionError.mapStorageNotFound(
-        MessageV2.pageEffect({
+        MessageV2.page({
           sessionID: ctx.params.sessionID,
           limit: ctx.query.limit,
           before: ctx.query.before,
@@ -132,7 +132,7 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
       params: { sessionID: SessionID; messageID: MessageID }
     }) {
       return yield* SessionError.mapStorageNotFound(
-        MessageV2.getEffect({ sessionID: ctx.params.sessionID, messageID: ctx.params.messageID }),
+        MessageV2.get({ sessionID: ctx.params.sessionID, messageID: ctx.params.messageID }),
       )
     })
 

packages/opencode/src/session/message-v2.ts

@@ -919,7 +919,11 @@ export function toModelMessages(
   return Effect.runPromise(toModelMessagesEffect(input, model, options).pipe(Effect.provide(EffectLogger.layer)))
 }
 
-export function page(input: { sessionID: SessionID; limit: number; before?: string }) {
+export const page = Effect.fn("MessageV2.page")(function* (input: {
+  sessionID: SessionID
+  limit: number
+  before?: string
+}) {
   const before = input.before ? cursor.decode(input.before) : undefined
   const where = before
     ? and(eq(MessageTable.session_id, input.sessionID), older(before))
@@ -937,7 +941,7 @@ export function page(input: { sessionID: SessionID; limit: number; before?: stri
     const row = Database.use((db) =>
       db.select({ id: SessionTable.id }).from(SessionTable).where(eq(SessionTable.id, input.sessionID)).get(),
     )
-    if (!row) throw new NotFoundError({ message: `Session not found: ${input.sessionID}` })
+    if (!row) return yield* new NotFoundError({ message: `Session not found: ${input.sessionID}` })
     return {
       items: [] as WithParts[],
       more: false,
@@ -954,24 +958,19 @@ export function page(input: { sessionID: SessionID; limit: number; before?: stri
     more,
     cursor: more && tail ? cursor.encode({ id: tail.id, time: tail.time_created }) : undefined,
   }
-}
-
-export const pageEffect = Effect.fn("MessageV2.pageEffect")(function* (input: {
-  sessionID: SessionID
-  limit: number
-  before?: string
-}) {
-  return yield* Effect.try({
-    try: () => page(input),
-    catch: (error) => error,
-  }).pipe(Effect.catch((error) => (NotFoundError.isInstance(error) ? Effect.fail(error) : Effect.die(error))))
 })
 
 export function* stream(sessionID: SessionID) {
   const size = 50
   let before: string | undefined
   while (true) {
-    const next = page({ sessionID, limit: size, before })
+    const next = Effect.runSync(
+      page({ sessionID, limit: size, before }).pipe(
+        Effect.catchIf(NotFoundError.isInstance, () =>
+          Effect.succeed({ items: [] as WithParts[], more: false, cursor: undefined }),
+        ),
+      ),
+    )
     if (next.items.length === 0) break
     for (let i = next.items.length - 1; i >= 0; i--) {
       yield next.items[i]
@@ -996,7 +995,7 @@ export function parts(message_id: MessageID) {
   )
 }
 
-export function get(input: { sessionID: SessionID; messageID: MessageID }): WithParts {
+export const get = Effect.fn("MessageV2.get")(function* (input: { sessionID: SessionID; messageID: MessageID }) {
   const row = Database.use((db) =>
     db
       .select()
@@ -1004,21 +1003,11 @@ export function get(input: { sessionID: SessionID; messageID: MessageID }): With
       .where(and(eq(MessageTable.id, input.messageID), eq(MessageTable.session_id, input.sessionID)))
       .get(),
   )
-  if (!row) throw new NotFoundError({ message: `Message not found: ${input.messageID}` })
+  if (!row) return yield* new NotFoundError({ message: `Message not found: ${input.messageID}` })
   return {
     info: info(row),
     parts: parts(input.messageID),
   }
-}
-
-export const getEffect = Effect.fn("MessageV2.getEffect")(function* (input: {
-  sessionID: SessionID
-  messageID: MessageID
-}) {
-  return yield* Effect.try({
-    try: () => get(input),
-    catch: (error) => error,
-  }).pipe(Effect.catch((error) => (NotFoundError.isInstance(error) ? Effect.fail(error) : Effect.die(error))))
 })
 
 export function filterCompacted(msgs: Iterable<WithParts>) {

packages/opencode/src/session/session.ts

@@ -759,14 +759,14 @@ export const layer: Layer.Layer<Service, never, Bus.Service | Storage.Service |
 
     const messages: Interface["messages"] = Effect.fn("Session.messages")(function* (input) {
       if (input.limit) {
-        return (yield* MessageV2.pageEffect({ sessionID: input.sessionID, limit: input.limit })).items
+        return (yield* MessageV2.page({ sessionID: input.sessionID, limit: input.limit })).items
       }
 
       const size = 50
       const result = [] as MessageV2.WithParts[]
       let before: string | undefined
       while (true) {
-        const page = yield* MessageV2.pageEffect({ sessionID: input.sessionID, limit: size, before })
+        const page = yield* MessageV2.page({ sessionID: input.sessionID, limit: size, before })
         if (page.items.length === 0) break
         for (let i = page.items.length - 1; i >= 0; i--) {
           const item = page.items[i]
@@ -817,7 +817,7 @@ export const layer: Layer.Layer<Service, never, Bus.Service | Storage.Service |
       const size = 50
       let before: string | undefined
       while (true) {
-        const page = yield* MessageV2.pageEffect({ sessionID, limit: size, before })
+        const page = yield* MessageV2.page({ sessionID, limit: size, before })
         if (page.items.length === 0) break
         for (let i = page.items.length - 1; i >= 0; i--) {
           const item = page.items[i]

packages/opencode/src/tool/task.ts

@@ -86,7 +86,7 @@ export const TaskTool = Tool.define(
           ],
         }))
 
-      const msg = yield* MessageV2.getEffect({ sessionID: ctx.sessionID, messageID: ctx.messageID }).pipe(Effect.orDie)
+      const msg = yield* MessageV2.get({ sessionID: ctx.sessionID, messageID: ctx.messageID }).pipe(Effect.orDie)
       if (msg.info.role !== "assistant") return yield* Effect.fail(new Error("Not an assistant message"))
 
       const model = next.model ?? {