fix(opencode): preserve InstanceRef context in prompt_async fork

Author: Grigory-Rylov

build_opencode.sh

@@ -14,4 +14,4 @@ set -euo pipefail
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 cd "$SCRIPT_DIR/packages/opencode"
 
-bun run build -- --single --skip-install
+bun run build -- --single --skip-install --skip-embed-web-ui

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

@@ -16,6 +16,7 @@ import { SessionSummary } from "@/session/summary"
 import { Todo } from "@/session/todo"
 import { MessageID, PartID, SessionID } from "@/session/schema"
 import { NamedError } from "@opencode-ai/core/util/error"
+import { attach } from "@/effect/run-service"
 import { Cause, Effect, Option, Schema, Scope } from "effect"
 import * as Stream from "effect/Stream"
 import { HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
@@ -311,18 +312,19 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
       payload: typeof PromptPayload.Type
     }) {
       yield* requireSession(ctx.params.sessionID)
-      yield* promptSvc.prompt({ ...ctx.payload, sessionID: ctx.params.sessionID }).pipe(
-        Effect.catchCause((cause) =>
-          Effect.gen(function* () {
-            yield* Effect.logError("prompt_async failed", { sessionID: ctx.params.sessionID, cause })
-            yield* events.publish(Session.Event.Error, {
-              sessionID: ctx.params.sessionID,
-              error: new NamedError.Unknown({ message: Cause.pretty(cause) }).toObject(),
-            })
-          }),
+      yield* attach(
+        promptSvc.prompt({ ...ctx.payload, sessionID: ctx.params.sessionID }).pipe(
+          Effect.catchCause((cause) =>
+            Effect.gen(function* () {
+              yield* Effect.logError("prompt_async failed", { sessionID: ctx.params.sessionID, cause })
+              yield* events.publish(Session.Event.Error, {
+                sessionID: ctx.params.sessionID,
+                error: new NamedError.Unknown({ message: Cause.pretty(cause) }).toObject(),
+              })
+            }),
+          ),
         ),
-        Effect.forkIn(scope, { startImmediately: true }),
-      )
+      ).pipe(Effect.forkIn(scope, { startImmediately: true }))
       return HttpApiSchema.NoContent.make()
     })