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How can I continue?

\\n> \\n> After more reviews become available, a review can be triggered using the `@coderabbitai review` command as a PR comment. Alternatively, push new commits to this PR.\\n> \\n> To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.\\n> \\n>

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How do review limits work?

\\n> \\n> CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.\\n> \\n> For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.\\n> \\n> Please refer [docs](https://docs.coderabbit.ai/management/plans#rate-limits) for additional details.\\n> \\n>

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Review details

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⚙️ Run configuration

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📥 Commits

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📒 Files selected for processing (46)

\\n> \\n> * `apps/web/src/app/api/ai/chat/__tests__/stream-socket-events.test.ts`\\n> * `apps/web/src/app/api/ai/chat/active-streams/__tests__/route.test.ts`\\n> * `apps/web/src/app/api/ai/chat/active-streams/route.ts`\\n> * `apps/web/src/app/api/ai/chat/route.ts`\\n> * `apps/web/src/app/api/ai/chat/stream-join/[messageId]/__tests__/route.test.ts`\\n> * `apps/web/src/app/api/ai/chat/stream-join/[messageId]/route.ts`\\n> * `apps/web/src/app/api/ai/global/[id]/messages/__tests__/credit-gate.test.ts`\\n> * `apps/web/src/app/api/ai/global/[id]/messages/__tests__/stream-socket-events.test.ts`\\n> * `apps/web/src/app/api/ai/global/[id]/messages/route.ts`\\n> * `apps/web/src/components/layout/middle-content/page-views/ai-page/AiChatView.tsx`\\n> * `apps/web/src/components/layout/middle-content/page-views/ai-page/__tests__/AiChatView.test.tsx`\\n> * `apps/web/src/components/layout/middle-content/page-views/dashboard/GlobalAssistantView.tsx`\\n> * `apps/web/src/components/layout/right-sidebar/ai-assistant/SidebarChatTab.tsx`\\n> * `apps/web/src/contexts/GlobalChatContext.tsx`\\n> * `apps/web/src/contexts/__tests__/GlobalChatContext.test.tsx`\\n> * `apps/web/src/hooks/__tests__/useAgentChannelMultiplayer.test.ts`\\n> * `apps/web/src/hooks/__tests__/useAppStateRecovery.test.ts`\\n> * `apps/web/src/hooks/__tests__/useChannelStreamSocket.test.ts`\\n> * `apps/web/src/hooks/useAgentChannelMultiplayer.ts`\\n> * `apps/web/src/hooks/useAppStateRecovery.ts`\\n> * `apps/web/src/hooks/useChannelStreamSocket.ts`\\n> * `apps/web/src/lib/ai/core/__tests__/stream-abort-client.test.ts`\\n> * `apps/web/src/lib/ai/core/__tests__/stream-lifecycle.test.ts`\\n> * `apps/web/src/lib/ai/core/__tests__/stream-liveness.test.ts`\\n> * `apps/web/src/lib/ai/core/__tests__/stream-subscription-authz.test.ts`\\n> * `apps/web/src/lib/ai/core/__tests__/stream-takeover.test.ts`\\n> * `apps/web/src/lib/ai/core/stream-abort-client.ts`\\n> * `apps/web/src/lib/ai/core/stream-lifecycle.ts`\\n> * `apps/web/src/lib/ai/core/stream-liveness.ts`\\n> * `apps/web/src/lib/ai/core/stream-subscription-authz.ts`\\n> * `apps/web/src/lib/ai/core/stream-takeover.ts`\\n> * `apps/web/src/lib/ai/shared/hooks/index.ts`\\n> * `apps/web/src/lib/ai/shared/hooks/useChatTransport.ts`\\n> * `apps/web/src/lib/ai/shared/hooks/useConversationIdentity.ts`\\n> * `apps/web/src/lib/ai/streams/__tests__/consumingChannels.test.ts`\\n> * `apps/web/src/lib/ai/streams/__tests__/isPlaceholderConversationId.test.ts`\\n> * `apps/web/src/lib/ai/streams/__tests__/shouldAttachStream.test.ts`\\n> * `apps/web/src/lib/ai/streams/consumingChannels.ts`\\n> * `apps/web/src/lib/ai/streams/isPlaceholderConversationId.ts`\\n> * `apps/web/src/lib/ai/streams/shouldAttachStream.ts`\\n> * `apps/web/src/lib/repositories/conversation-repository.ts`\\n> * `apps/web/src/lib/websocket/socket-utils.ts`\\n> * `packages/db/drizzle/0200_strange_viper.sql`\\n> * `packages/db/drizzle/meta/0200_snapshot.json`\\n> * `packages/db/drizzle/meta/_journal.json`\\n> * `packages/db/src/schema/ai-streams.ts`\\n> \\n>

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✨ Finishing Touches

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🧪 Generate unit tests (beta)

\\n\\n- [ ] Create PR with unit tests\\n- [ ] Commit unit tests in branch `pu/server-owned-streams`\\n\\n

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\\n\\n\\n\\n\\n---\\n\\nThanks for using [CodeRabbit](https://coderabbit.ai?utm_source=oss&utm_medium=github&utm_campaign=2witstudios/PageSpace&utm_content=2011)! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.\\n\\n

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\\n\\n\\n_{Comment `@coderabbitai help` to get the list of available commands.}\\n\\n\",\"path\":null,\"side\":null,\"line\":null}{\"type\":\"pull_request_comment\",\"body\":\"**_{_{![P1 Badge](https://img.shields.io/badge/P1-orange?style=flat)}} Abort streams with their owner, not the takeover user**\\n\\nIn a shared conversation, if user B sends while user A's generation is still running, this calls `abortStreamByMessageId` with B's user id. The abort registry authorizes aborts against the stream owner, so the call returns unauthorized, after which the row is still marked `aborted` and B's new stream starts while A's old generation continues editing/billing in the background. Select/pass the row's original `userId` (or use an internal abort path) so takeover actually stops live streams started by other participants.\\n\\nUseful? React with 👍 / 👎.\",\"path\":\"apps/web/src/lib/ai/core/stream-takeover.ts\",\"side\":\"RIGHT\",\"line\":null}{\"type\":\"pull_request_comment\",\"body\":\"**_{_{![P2 Badge](https://img.shields.io/badge/P2-yellow?style=flat)}} Do not skip aborting quiet but still-running streams**\\n\\nWhen a live generation is quiet for more than two minutes (for example during a long tool call, or before enough chunks arrive to hit the 20-part checkpoint), `isStreamRowLive` returns false and this takeover decision omits it from `abort`. The subsequent reconcile marks the DB row aborted, but the in-process abort controller is never signaled, so a second send can run concurrently with the still-running first stream and the old stream can later keep writing/tool-editing. Takeover should still attempt to abort every in-flight row that may be owned by this process, using liveness only to decide what to expose as resumable.\\n\\nUseful? React with 👍 / 👎.\",\"path\":\"apps/web/src/lib/ai/core/stream-liveness.ts\",\"side\":\"RIGHT\",\"line\":null}{\"type\":\"pull_request_comment\",\"body\":\"\\n### 💡 Codex Review\\n\\nHere are some automated review suggestions for this pull request.\\n\\n**Reviewed commit:** `332c691e4e`\\n \\n\\n

ℹ️ About Codex in GitHub

\\n
\\n\\n[Your team has set up Codex to review pull requests in this repo](https://chatgpt.com/codex/cloud/settings/general). Reviews are triggered when you\\n- Open a pull request for review\\n- Mark a draft as ready\\n- Comment \\\"@codex review\\\".\\n\\nIf Codex has suggestions, it will comment; otherwise it will react with 👍.\\n\\n\\n\\n\\nCodex can also answer questions or update the PR. Try commenting \\\"@codex address that feedback\\\".\\n \\n

\",\"path\":null,\"side\":null,\"line\":null}{\"type\":\"pull_request_comment\",\"body\":\"Correct, and fixed in `a70e1d1` — thank you, this was the sharpest finding on the PR.\\n\\nYou're right that the abort registry authorizes against the stream's **owner** (`stream-abort-registry.ts:141-143`), so passing the caller's id made the guard refuse every cross-user abort. On a shared conversation that meant user B's send left user A's generation running — still calling tools, still editing pages, still billing — while B's new generation started beside it. Exactly the double-generation this guard exists to prevent.\\n\\nThat IDOR guard exists for the *client-facing* `POST /api/ai/abort` endpoint. Takeover is not that: it's a trusted server-side path, and the caller's right to write to this conversation is already established upstream (page edit access, plus a new ownership/shared check on `conversationId` in the route). So `takeOverConversationStreams` now selects `aiStreamSessions.userId` and aborts **as the owner**:\\n\\n```ts\\nconst owner = ownerByMessageId.get(messageId);\\nif (!owner) continue;\\nconst result = abortStreamByMessageId({ messageId, userId: owner });\\n```\\n\\nThe `userId` parameter is gone from the function signature entirely, so there is no way to reintroduce the caller-id variant by accident. Pinned by a test that asserts the abort is issued with the owner's id and that the takeover actually succeeds: *\\\"given a live stream owned by ANOTHER user, should abort it as its OWNER so the takeover actually stops it\\\"* (`stream-takeover.test.ts`).\\n\\nRelated: the second half of what you describe — the row being marked `aborted` even when the abort was refused — is also fixed. `decideStreamTakeover` now only reconciles rows we can *prove* are finished (actually aborted, or provably dead). A live row we cannot stop is left alone and logged, because stamping `status='aborted', parts=[]` over a running stream hides it from every subscriber and destroys its only crash-recovery snapshot.\",\"path\":\"apps/web/src/lib/ai/core/stream-takeover.ts\",\"side\":\"RIGHT\",\"line\":null}{\"type\":\"pull_request_comment\",\"body\":\"Agreed and fixed — this was a genuine defect that defeated AC5, and my original code comment had the logic exactly backwards (it claimed misjudging a live row as stale was \\\"harmless\\\").\\n\\nTwo changes:\\n\\n**1. Liveness no longer gates the abort.** As you say, aborting an unknown `messageId` is free (`abortStreamByMessageId` returns `{aborted:false}`; it does not throw), whereas *skipping* an abort for a row we misjudged leaves a real generation running. The asymmetry is total, so `decideStreamTakeover` now returns **every** in-flight row in `abort`, and liveness is used only to decide what may be driven terminal:\\n\\n```ts\\nabort: rows.map((r) => r.messageId),\\nreconcile: rows\\n .filter((r) => aborted.has(r.messageId) || !isStreamRowLive(r, now, staleAfterMs))\\n .map((r) => r.messageId),\\n```\\n\\nThat also fixes the reconcile half you flag: a row we could not abort but that is still beating is now **left alone**, rather than being stamped `aborted` while it keeps writing.\\n\\n**2. The heartbeat is now a real timer, not the parts checkpoint.** Your parenthetical is the root cause: a stream in a long tool call pushes *no parts at all*, so a checkpoint-driven heartbeat could never have covered it — no value of `PERSIST_EVERY_N_PARTS` would. `stream-lifecycle.ts` now writes `lastHeartbeatAt` on a 20s interval (cleared in `finish()`, `unref`'d), independent of `pushPart`. Without this the same quiet stream also vanished from `GET /active-streams` mid-flight, so no client could attach to it — which is what walked the user into sending again in the first place.\\n\\nTests pinning both: *\\\"given a row that LOOKS stale, should still attempt to abort it (a liveness guess must never gate the abort)\\\"*, *\\\"given a LIVE row we could not abort, should NOT reconcile it\\\"* (`stream-liveness.test.ts`), and *\\\"given a stream that pushes NO parts at all (a long tool call), should still beat\\\"* (`stream-lifecycle.test.ts`).\",\"path\":\"apps/web/src/lib/ai/core/stream-liveness.ts\",\"side\":\"RIGHT\",\"line\":null}","text_elements",[],{"_434":876,"_415":416,"_436":422},{"_437":877,"_439":-5,"_42":-5,"_440":-5,"_441":-5,"_97":313,"_93":443},[878],{"_46":872,"_93":879},"input_text",{"_434":881,"_415":416,"_436":422},{"_437":882,"_439":-5,"_42":-5,"_440":-5,"_441":-5,"_97":313,"_93":443},[883,884],{"_46":886,"_93":879},{"_46":885,"_93":879},"\n /workspace/PageSpace\n bash\n 2026-07-11\n Etc/UTC\n","# AGENTS.md instructions for /workspace/PageSpace\n\n\n# PageSpace Codebase Guidelines\n\n## 1. TECH STACK & ARCHITECTURE\n\n### 1.1. Core Technology Stack\n\n- **Full-Stack**: Next.js 15 App Router + TypeScript + Tailwind + shadcn/ui\n- **Database**: PostgreSQL + Drizzle ORM (local deployment via Docker)\n- **AI**: Ollama (local models) + Vercel AI SDK + OpenRouter + Google AI SDK\n- **Auth**: Passwordless — passkeys (WebAuthn) + magic links; opaque session tokens, SHA3-256 hashed at rest\n- **File Storage**: Local filesystem with metadata in PostgreSQL\n- **Real-time**: Socket.IO for live collaboration\n- **Deployment**: Docker containers on Mac Studio (local deployment)\n\n### 1.2. Monorepo Architecture\n\nThis project uses a bun workspace with the following structure:\n\n- `apps/web`: The main Next.js 15 frontend and backend application\n- `apps/realtime`: A dedicated Socket.IO service for real-time communication\n- `apps/processor`: Express-based file/OCR processing pipeline\n- `packages/db`: The centralized Drizzle ORM package containing database schema, migrations, and query logic\n- `packages/lib`: Shared utilities, types, and functions used across the monorepo\n- `types/`: Global TypeScript types\n- `scripts/`: Helper scripts\n\n**Database Schema**: Entry point at `packages/db/src/schema.ts`; migrations emit to `packages/db/drizzle/`.\n\n### 1.3. Key Dependencies\n\n**Frontend & UI:**\n- Next.js 15.3.5 with App Router\n- React ^19.0.0 + TypeScript ^5.8.3\n- Tailwind CSS ^4 + shadcn/ui components\n- TipTap rich text editor with markdown support\n- Monaco Editor for code editing\n- @dnd-kit for drag-and-drop functionality\n\n**Backend & Database:**\n- Drizzle ORM ^0.32.2 with PostgreSQL\n- Passwordless auth: `@simplewebauthn/server` for passkeys, magic-link tokens, opaque session tokens (SHA3-256 hashed at rest)\n\n**AI & Real-time:**\n- Vercel AI SDK ^4.3.17\n- Ollama AI provider ^1.2.0 for local models\n- @ai-sdk/google ^1.2.22, @ai-sdk/anthropic ^1.2.12, @ai-sdk/openai ^1.3.23\n- @openrouter/ai-sdk-provider 0.7.2 for cloud models\n- Socket.IO ^4.7.5 for real-time collaboration\n\n**State Management:**\n- Zustand for client state\n- SWR for server state and caching\n\n## 2. NEXT.JS 15 ROUTE HANDLER REQUIREMENTS\n\n### 2.1. Breaking Change: Dynamic Route params are Promises\n\n**CRITICAL**: In Next.js 15, `params` in dynamic routes are Promise objects. You MUST await `context.params` before destructuring.\n\n```typescript\n// ✅ CORRECT Pattern\nexport async function GET(\n request: Request,\n context: { params: Promise<{ id: string }> }\n) {\n const { id } = await context.params; // Must await params\n return Response.json({ id });\n}\n\n// ❌ INCORRECT Pattern\nexport async function GET(\n request: Request,\n { params }: { params: { id: string } } // WRONG: params is a Promise\n) {\n // This will fail in Next.js 15\n}\n```\n\n### 2.2. Request Handling Standards\n\n- **Get Request Body**: `const body = await request.json();`\n- **Get Search Params**: `const { searchParams } = new URL(request.url);`\n- **Return JSON**: `return Response.json(data)` or `return NextResponse.json(data)`\n\n## 3. DEVELOPMENT STANDARDS\n\n### 3.1. Code Quality Principles\n\n- **No `any` types** - Always use proper TypeScript types\n- **Explicit over implicit** - Clear, self-documenting code\n- **Right-first approach** - Build the ideal solution from the start\n- **Consistent patterns** - Follow established conventions\n\n### 3.2. Coding Style & Naming Conventions\n\n- TypeScript strict mode; ESM modules\n- **Filenames**: kebab-case (`image-processor.ts`), with exceptions:\n - React hooks: camelCase matching export (`useAuth.ts`)\n - Zustand stores: camelCase with `use` prefix (`useAuthStore.ts`)\n - React components: PascalCase (`UserProfile.tsx`)\n- **Variables/functions**: camelCase\n- **Constants**: UPPER_SNAKE_CASE\n- **Types/enums**: PascalCase\n- Format with Prettier; lint with Next/ESLint (`apps/web/eslint.config.mjs`)\n- Keep diffs minimal and focused\n\n### 3.3. Critical Patterns\n\n**Message Content Structure:**\n```typescript\n// ✅ CORRECT - Always use message parts structure\nconst message = {\n parts: [\n { type: 'text', text: \"Hello world\" }\n ]\n};\n```\n\n**Permission Logic:**\n```typescript\n// ✅ CORRECT - Use centralized permissions\nimport { getUserAccessLevel, canUserEditPage } from '@pagespace/lib/permissions/permissions';\nconst accessLevel = await getUserAccessLevel(userId, pageId);\n```\n\n**Database Access:**\n```typescript\n// ✅ CORRECT - Always use Drizzle subpath imports\nimport { db } from '@pagespace/db/db';\nimport { pages } from '@pagespace/db/schema/core';\nconst page = await db.select().from(pages);\n```\n\n## 4. BUILD, TEST, AND DEVELOPMENT COMMANDS\n\n### 4.1. Development Commands\n\n```bash\n# Install dependencies\nbun install\n\n# Environment setup\ncp .env.example .env\n# Also: apps/web/.env.example → apps/web/.env if needed\n\n# Database (local)\nbun run dev:db # Starts Postgres + runs migrations\ndocker compose up -d # Alternative\n\n# Develop all apps\nbun run dev # Runs Turbo dev across packages\n\n# Focus a single app\nbun run --filter 'web' dev\nbun run --filter 'realtime' dev\nbun run --filter '@pagespace/processor' dev\n\n# Build and quality checks\nbun run build # Build all apps\nbun run typecheck # TypeScript checks\nbun run lint # ESLint\nbun run --filter 'web' build # Build web app only\nbun run --filter 'web' lint # Lint web app only\n\n# Database tasks\nbun run db:generate # Create migrations\nbun run db:migrate # Apply migrations\nbun run --filter '@pagespace/db' db:studio # Browse schema\n```\n\n### 4.2. Testing Guidelines\n\n- No global test runner is enforced yet. When adding tests:\n - Prefer unit tests for `packages/lib`/`apps/processor` (`*.test.ts` next to source or in `__tests__/`)\n - Add a `test` script in the target package and run with `bun run --filter '' test`\n - Use `bun run typecheck` and `bun run lint` as gates before PRs\n\n## 5. PAGESPACE DOMAIN EXPERT AGENTS\n\nPageSpace has 17 specialized domain expert agents with deep knowledge of specific subsystems.\n\n### 5.1. Core Infrastructure (5 agents)\n\n- **Authentication & Security Expert**: passkey/magic-link auth, opaque session tokens, CSRF protection, encryption, rate limiting, session management\n- **Database & Schema Expert**: Drizzle ORM, PostgreSQL, migrations, schema design, query optimization\n- **Permissions & Authorization Expert**: RBAC, drive membership, page permissions, access control logic\n- **Real-time Collaboration Expert**: Socket.IO, live sync, conflict resolution, event broadcasting\n- **Monitoring & Analytics Expert**: Logging, tracking, performance metrics, error handling, usage analytics\n\n### 5.2. AI Intelligence (3 agents)\n\n- **AI System Architect**: AI providers, message flow, streaming, model capabilities, provider factory\n- **AI Tools Integration Expert**: Tool calling, PageSpace tools, batch operations, search tools\n- **AI Agents Communication Expert**: Agent roles, agent-to-agent communication, custom agents\n\n### 5.3. Content & Workspace (4 agents)\n\n- **Pages & Content Expert**: Page types, content management, CRUD operations, tree structure\n- **Drives & Workspace Expert**: Drive management, membership, invitations, workspace organization\n- **File Processing Expert**: File uploads, processor service, image optimization, content-addressed storage\n- **Search & Discovery Expert**: Regex search, glob patterns, multi-drive search, mention system\n\n### 5.4. Frontend & UX (3 agents)\n\n- **Frontend Architecture Expert**: Next.js 15, App Router, components, state management, Zustand, SWR\n- **Editor System Expert**: Tiptap, Monaco, document state, auto-save, Prettier integration\n- **Canvas Dashboard Expert**: Shadow DOM, custom HTML/CSS, navigation, security sanitization\n\n### 5.5. API & Integration (2 agents)\n\n- **API Routes Expert**: Next.js routes, async params, request handling, error responses, middleware\n- **MCP Integration Expert**: MCP tokens, document operations, protocol integration, external tools\n\n## 6. COMMON WORKFLOWS\n\n### 6.1. Development Workflows\n\n1. **Adding new API routes**: Follow Next.js 15 async params pattern (see Section 2.1)\n2. **Database changes**: Update schema in `packages/db`, generate migrations with `bun run db:generate`\n3. **New components**: Follow existing patterns in `components/` directory\n4. **Permission changes**: Update centralized logic in `@pagespace/lib/permissions/permissions`\n\n### 6.2. Commit & Pull Request Guidelines\n\n- **Commits**: short, imperative subject (≤72 chars), optional scope like `[web]`, `[processor]`\n- **PRs**: clear description, linked issues, screenshots for UI, note DB migrations and any `.env` or config changes. Include reproduction/verification steps.\n- **Before opening**: run `bun run build`, `bun run typecheck`, and relevant `db:*` tasks\n- **Documentation**: When changes land, update the changelog and any user-visible notes\n\n## 7. SECURITY & CONFIGURATION\n\n- Never commit secrets. Base config in `.env.example`; runtime in `.env`\n- Important vars: `DATABASE_URL`, encryption keys, `WEB_APP_URL`, `NEXT_PUBLIC_*`, service ports\n- For self‑host, see `docker-compose.yml`\n\n",{"_434":888,"_415":416,"_436":422},{"_437":889,"_439":-5,"_42":-5,"_440":-5,"_441":-5,"_97":890,"_93":443},[891,892],"developer",{"_46":894,"_93":879},{"_46":893,"_93":879},"\n## Skills\nA skill is a set of local instructions to follow that is stored in a `SKILL.md` file. Below is the list of skills that can be used. Each entry includes a name, description, and file path so you can open the source for full instructions when using a specific skill.\n### Available skills\n- imagegen: Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output should be a bitmap asset rather than repo-native code or vector. Do not use when the task is better handled by editing existing SVG/vector/code-native assets, extending an established icon or logo system, or building the visual directly in HTML/CSS/canvas. (file: /opt/codex/skills/.system/imagegen/SKILL.md)\n- openai-docs: Use when the user asks how to build with OpenAI products or APIs and needs up-to-date official documentation with citations, help choosing the latest model for a use case, or model upgrade and prompt-upgrade guidance; prioritize OpenAI docs MCP tools, use bundled references only as helper context, and restrict any fallback browsing to official OpenAI domains. (file: /opt/codex/skills/.system/openai-docs/SKILL.md)\n- plugin-creator: Create and scaffold plugin directories for Codex with a required `.codex-plugin/plugin.json`, optional plugin folders/files, and baseline placeholders you can edit before publishing or testing. Use when Codex needs to create a new local plugin, add optional plugin structure, or generate or update repo-root `.agents/plugins/marketplace.json` entries for plugin ordering and availability metadata. (file: /opt/codex/skills/.system/plugin-creator/SKILL.md)\n- skill-creator: Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Codex's capabilities with specialized knowledge, workflows, or tool integrations. (file: /opt/codex/skills/.system/skill-creator/SKILL.md)\n- skill-installer: Install Codex skills into $CODEX_HOME/skills from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos). (file: /opt/codex/skills/.system/skill-installer/SKILL.md)\n### How to use skills\n- Discovery: The list above is the skills available in this session (name + description + file path). Skill bodies live on disk at the listed paths.\n- Trigger rules: If the user names a skill (with `$SkillName` or plain text) OR the task clearly matches a skill's description shown above, you must use that skill for that turn. Multiple mentions mean use them all. Do not carry skills across turns unless re-mentioned.\n- Missing/blocked: If a named skill isn't in the list or the path can't be read, say so briefly and continue with the best fallback.\n- How to use a skill (progressive disclosure):\n 1) After deciding to use a skill, open its `SKILL.md`. Read only enough to follow the workflow.\n 2) When `SKILL.md` references relative paths (e.g., `scripts/foo.py`), resolve them relative to the skill directory listed above first, and only consider other paths if needed.\n 3) If `SKILL.md` points to extra folders such as `references/`, load only the specific files needed for the request; don't bulk-load everything.\n 4) If `scripts/` exist, prefer running or patching them instead of retyping large code blocks.\n 5) If `assets/` or templates exist, reuse them instead of recreating from scratch.\n- Coordination and sequencing:\n - If multiple skills apply, choose the minimal set that covers the request and state the order you'll use them.\n - Announce which skill(s) you're using and why (one short line). If you skip an obvious skill, say why.\n- Context hygiene:\n - Keep context small: summarize long sections instead of pasting them; only load extra files when needed.\n - Avoid deep reference-chasing: prefer opening only files directly linked from `SKILL.md` unless you're blocked.\n - When variants exist (frameworks, providers, domains), pick only the relevant reference file(s) and note that choice.\n- Safety and fallback: If a skill can't be applied cleanly (missing files, unclear instructions), state the issue, pick the next-best approach, and continue.\n","\nFilesystem sandboxing defines which files can be read or written. `sandbox_mode` is `danger-full-access`: No filesystem sandboxing - all commands are permitted. Network access is enabled.\nApproval policy is currently never. Do not provide the `sandbox_permissions` for any reason, commands will be rejected.\n","turn/started",{"_415":416,"_88":897},{"_104":-5,"_42":422,"_423":898,"_425":426,"_427":899},[],"inProgress",{"_427":901,"_415":416},{"_902":903,"_93":904},"activeFlags",[],"active","thread/started",{"_907":908},"thread",{"_909":-5,"_910":-5,"_911":912,"_913":426,"_475":476,"_914":15,"_915":-5,"_916":-5,"_42":416,"_917":918,"_193":-5,"_919":-5,"_166":920,"_921":207,"_922":-5,"_482":923,"_427":924,"_925":-5,"_78":926,"_927":426},"agentNickname","agentRole","cliVersion","0.128.0","createdAt","ephemeral","forkedFromId","gitInfo","modelProvider","openai","parentThreadId","/opt/codex/sessions/2026/07/11/rollout-2026-07-11T21-19-31-019f530c-bb55-79f2-a71d-28b8f142531e.jsonl","preview","recencyAt","vscode",{"_93":431},"threadSource",[],"updatedAt",[],"messages",[931],{"_42":932,"_933":934,"_935":936,"_937":936,"_437":938,"_427":939,"_439":-5,"_940":32,"_941":942,"_943":944,"_945":-5},"fab399e1-1445-4c2c-8754-235db8781573","author",{"_97":313,"_193":-5,"_941":954},"create_time",1783804769.409074,"update_time",{"_950":46,"_951":952},"finished_successfully","weight","metadata",{"_946":947},"recipient","all","channel","l1239dk1",{"_948":949},"inline_comments",[],"content_type","parts",[953],"## Convergence summary — what changed since the initial review\n\nFour adversarial review passes over this diff surfaced defects serious enough that the original AC5 guard was not merely incomplete, it was **wrong**. Flagging them here because the PR now differs materially from what was first reviewed, and two of them are security issues.\n\n### The AC5 guard was defeating itself\n\n1. **A liveness *guess* gated the abort.** The heartbeat rode the 20-part parts-checkpoint while the stale window was 2 minutes — so a stream inside a long tool call (>2 min, <20 parts) looked *dead*. `decideStreamTakeover` then put it in `reconcile` but **not** `abort`: the running generation was never stopped, and a second one started beside it. Precisely the double-generation the guard exists to prevent. Aborting an unknown `messageId` is free; *skipping* an abort is not — so every in-flight row now gets an abort attempt, unconditionally.\n2. **Reconcile lied about streams it couldn't stop.** A row whose abort was refused (cross-user) or not-found (another web instance) was still stamped `status='aborted', parts=[]` — hiding a **live** stream from every subscriber and destroying its only crash-recovery snapshot while it kept running, kept calling tools, and kept billing. Now only rows we can *prove* are finished get reconciled.\n3. **The heartbeat couldn't work.** A quiet tool call pushes no parts *at all*, so no checkpoint-driven heartbeat could ever have covered it. It's now a real 20s timer — capped at 15 min, because an unbounded beat on a lifecycle whose `finish()` never fired would be strictly *worse* than none (an immortal live-looking row that can never be reconciled or taken over).\n4. **Takeover aborted as the caller, not the stream's owner** (thanks @chatgpt-codex-connector — P1). The abort registry authorizes against the owner, so cross-user aborts were refused every time: on a shared conversation, B's send left A's generation running while B's started beside it.\n\n### Security\n\n5. **IDOR in the new `conversationId` validation.** The history load is keyed on `(pageId, conversationId)` with **no user filter**, and the id I was grandfathering — `${pageId}-default` — is *derivable from the page id*. Any member with edit access could read a co-member's private conversation. Now authorized (own or explicitly shared, and belonging to this page), and it fails **closed** on legacy conversations and on DB errors.\n\n6. **Stream subscription was authorized on page access alone** — pre-existing on master, but this PR is what makes streams a first-class subscribable entity, so it had to be answered. A page channel carries *every* conversation on the page, and conversations are **private by default**: `/active-streams` (which returns the buffered `parts` snapshot) and `/stream-join` (which streams the tokens) would hand a co-member's private conversation to anyone who could open the page.\n\n The fix is deliberately **not a new policy** — it's the existing one, finally applied to streams. `listConversations` already filters `WHERE conv.\"userId\" = $me OR conv.\"isShared\" = true`; subscription now enforces exactly that, so *what you can watch matches what you can list*.\n\n### One of my own fixes was a regression, and was reverted\n\nWhile restoring the sentinel's one deliberate property (\"concurrent openers share a conversation\"), I dropped the conversation filter whenever the conversation was unpersisted — which is the *normal* state of a fresh page, New Chat, and post-delete. That rendered every stream on the page channel, i.e. **other members' private conversations**, and gave a blank \"New Chat\" a Stop button wired to the old conversation. The property I was chasing *was* the leak. Reverted; scoping is unconditional.\n\n### Verification\n\n`tsc --noEmit` clean · `lint` clean (14/14) · `test:unit` — `@pagespace/lib` 7545 passed / 0 failed; `web` 12534 passed, 848 files. The 3 remaining web failures (`activity-tools`, `admin-role-version`, `grouping` — 16 tests) are **pre-existing**: they need a Postgres role absent from this environment plus one timezone-dependent assertion. I reproduced the identical 16 failures on a clean `origin/master` worktree to confirm they are not mine.\n\nEvery fix above is pinned by a test that fails without it.\nfeat(ai): server-owned streams — clients become pure subscribers\n\n## The architecture, not the symptom\n\nToday an AI stream is **implicitly owned by the browser tab that started it**. The tab that POSTs `/api/ai/chat` consumes the HTTP response body directly, and the socket path deliberately drops its own stream. The server-side generation, meanwhile, is disconnect-immune by design — `request.signal` is never wired into `streamText`.\n\nSo the moment the originating tab reloads, the stream is **orphaned**. The server keeps generating. Tool calls keep landing. Pages visibly get edited. The reloaded tab shows no stream, no Stop button, and a live input box. Sending again starts a **second concurrent generation** on the same conversation: two agents editing the same pages, two bills.\n\nThis is the iPad's daily reality — iOS jetsams the WKWebView content process and Capacitor calls `webView.reload()` — but none of the underlying bugs are iPad-specific.\n\n**This PR makes a stream a server-side entity with its own identity, lifecycle and durable state. A client becomes a subscriber**: it can attach, detach, reload, background, crash, or open in a second tab, and the stream is unaffected. Any client that opens the conversation — including the one that started it, including a brand-new one — attaches to whatever is live and renders the in-progress output. The iPad symptoms disappear as a consequence.\n\n### What already existed (and was not rebuilt)\n\nThe durable machinery was mostly there — it was just unreachable by the originating tab. `ai_stream_sessions` checkpoints the parts buffer; `/active-streams` serves that snapshot; `/stream-join/[messageId]` is an SSE multicast that replays its whole buffer before attaching; and the mount bootstrap already does snapshot-then-subscribe with **no gap and no double-render** (it passes the snapshot length as `skipReplayCount` so the replay's duplicate prefix is dropped). What was broken is *who is allowed to attach, and when*.\n\n---\n\n## AC → code\n\n### AC1 — A client can attach to its OWN live stream\n\nThe old skip keyed off `browserSessionId`, which lives in `sessionStorage` and **survives the reload**. So a reloaded tab still classified itself as the originator and dropped its own stream *forever*.\n\nReplaced with a synchronous in-memory consuming-set (`lib/ai/streams/consumingChannels.ts`), marked **before the POST leaves** and cleared when the response body actually finishes. **The set is empty after any reload** — a reloaded tab is no longer special. The decision is one pure function, `shouldAttachStream({ isOwn, isConsuming })`, applied in both `handleStreamStart` and the bootstrap.\n\nTwo deliberate deviations from the brief, both load-bearing:\n- **Marked at the transport** (`createStreamTrackingFetch`, threaded a `channelId` through `useChatTransport`) rather than in `AiChatView`'s send path. `useChannelStreamSocket` is shared by four surfaces; a set only `AiChatView` populated would make the other three double-render their own streams. The transport is the single choke point every POST passes through — it also covers `regenerate`.\n- **Kept `isOwn` in the conjunction.** A bare `isConsuming(channelId)` skip would drop *remote* streams on the same page channel — multiplayer as collateral damage.\n\nNot keyed off `getActiveStreamId({chatId})`: that only populates when the response *headers* land, which can lose the race against `broadcastAiStreamStart`.\n\n### AC2 — Attach on reload, on reconnect, on a cold open\n\n- Bootstrap now **re-runs on socket reconnect** (socket.io reconnects the same instance in place, so the main effect never re-fired). Idempotent via `claimBootstrapConsumer`.\n- A failed SSE join no longer swallows the later `chat:stream_complete`. Prod runs multiple web instances and the multicast registry is per-process, so a cross-instance join 404s — the stream is very much alive. Previously that event was suppressed, so the ghost vanished and the finished, durably-persisted message was never loaded. It now reloads from the DB.\n\n### AC3 — The `${page.id}-default` sentinel is gone\n\nThe client sent a sentinel id; the server accepted it **unvalidated** and minted a real `conversations` row under it; both client load paths then hard-bailed on that exact string. The messages persisted and were never loaded — an empty chat after any reload, on any platform.\n\nShipped in the order that does not strand anyone:\n\n1. **Stop gating on the id string.** Identity carries `isPersisted` instead. **This recovers existing users' stranded `-default` history with no data migration** — those rows come back from `listConversations` like any other conversation and now load normally.\n2. **Then** mint a real `createId()` cuid for new chats (skip token claimed before `setIdentity`, or the load effect blanks the optimistic bubble).\n3. **Validate server-side** — but *not* a bare `isCuid` reject. Step 1 revives those legacy conversations and clients will keep POSTing that id; a hard reject would lock them out of the history we just gave back. The rule is **\"a non-cuid id must already exist\"**: new rows can only ever be created from a cuid.\n4. **Authorize it.** The history load is keyed on `(pageId, conversationId)` with **no user filter**, and `${pageId}-default` is *derivable from the page id* — so grandfathering it without an ownership check would let any member with edit access read a co-member's private conversation. An existing conversation must now be the caller's own or explicitly shared, and must belong to this page. (`contextId` is nullable, so the page match is only enforced when it's set — an owner is never locked out by a historically-unset column.)\n\n### AC4 — The resume path is alive when it's needed\n\n`enabled` gated on `isAnyActive()`, which is true whenever an `'ai-streaming'` session exists — and `AiChatView` registers one while streaming. The hook disabled itself in precisely the case it was written for. Worse, a boolean is captured **at render**, and iOS freezes JS while backgrounded.\n\n`enabled` is now `boolean | (() => boolean)`, evaluated **at fire time**, and the AI page gates on **user editing only** (`isAnyEditing()`).\n\n### AC5 — Per-conversation takeover, never double-generate\n\nThere was no per-conversation guard at all; the only limiter was the credit gate's per-**user** `maxInFlight` (skipped entirely for metering-exempt providers).\n\n`takeOverConversationStreams()` runs before `createStreamLifecycle` on **both** the page-agent route and the global chat route (the latter also calls `createStreamLifecycle` and had no in-flight guard at all). **Takeover, not a 409** — the terminal status write is fire-and-forget and dies with the process, so a crashed generation leaves a permanently-`streaming` row, and a 409 would self-lock the conversation behind it. That failure mode is worse than the bug.\n\nTwo invariants make it safe, and both were wrong in the first push (caught in self-review — see below):\n\n- **A liveness guess never gates the abort.** Aborting an unknown `messageId` is free (`{aborted:false}`, no throw); *skipping* an abort for a row we misjudged as dead leaves a real generation running and starts a second one beside it. So every in-flight row gets an abort attempt, unconditionally.\n- **Reconcile only what we can prove is finished** — what the registry actually aborted, plus what is provably dead. A row whose abort was *refused* (cross-user guard on a shared conversation) or *not-found* (another web instance) is left alone. Stamping `status='aborted', parts=[]` over a still-generating stream would hide it from every subscriber and destroy its only crash-recovery snapshot while it kept running and kept billing.\n\nLiveness is a heartbeat, not a status: a new `lastHeartbeatAt` column written by a **20s timer**. It deliberately does *not* ride the parts checkpoint — a stream inside a long tool call pushes no parts at all, so a checkpoint-driven heartbeat would declare a healthy stream dead, vanish it from `/active-streams`, and let the next send generate alongside it. The same predicate also fixes a live bug in `/active-streams`, which served crashed rows as phantom \"streaming\" ghosts (with a Stop button) for up to 10 minutes.\n\n### AC6 — Conversation-scoped stream selection\n\n`getRemotePageStreams(page.id)` had no conversation filter, so a stream in a *different* conversation on the same page rendered into the active one — which on its own looks exactly like duplication. Filtered, mirroring `selectChannelRemoteStreams`. `ownStreamMessageId` too, so the Stop button never lights up for another conversation — and the same scoping now applies to the Stop-slot claim in `useAgentChannelMultiplayer` and `GlobalChatContext`, which had the identical bug.\n\nOne flip side, worth calling out because it is where the sentinel *was* load-bearing: a conversation that does not exist server-side yet owns no streams, so there is nothing to confuse it with — and filtering by its id would hide the only thing worth showing. Two people open a fresh AI page, each mints its own cuid, and one sends: the other must still watch that stream (it used to, via the shared sentinel id). So the scoping is applied only once the conversation is persisted.\n\n### Security hardening surfaced by this work\n\nMaking streams a first-class *subscribable* entity forced the question \"who may subscribe?\" — and the honest answer exposed a **pre-existing hole on master**:\n\n`GET /api/ai/chat/active-streams` and `GET /api/ai/chat/stream-join/[messageId]` both authorized on **page view access alone**. But a page channel carries *every* conversation on that page, and conversations are **private by default**. So any member of a shared AI page could join — and receive the live tokens of, and the buffered `parts` snapshot of — a co-member's private conversation.\n\nNew `canSubscribeToStream` / `filterSubscribableStreams`: you may subscribe to a stream **you started**, or one in an **explicitly shared** conversation. Fails closed. Page-level authorization still runs first; this narrows it.\n\nThis is not a new policy — it is the **existing** one, finally applied to streams. `listConversations` already filters `WHERE conv.\"userId\" = $me OR conv.\"isShared\" = true`. Stream subscription now enforces exactly that rule, so what you can *watch* matches what you can *list*. (Corollary: an MCP-owned private conversation's stream becoming invisible to page members is not a regression — its messages were never listable to them either.)\n\nTwo consequences worth calling out:\n- `chat:stream_start` now carries `isShared`, so a client can distinguish \"my own stream in another tab\" from \"a co-member's private conversation\" without asking the server. Keyed on the stream's **userId**, not `browserSessionId` — the same user in a second tab has a different session but it is still their stream. Without this, every member's client fires a doomed `/stream-join` per assistant message. The field is optional and only an explicit `false` skips: an originator on the previous build emits nothing during a rolling deploy, and dropping on `undefined` would black out multiplayer for shared conversations mid-deploy.\n- `/stream-join` returns a quiet **404** for a stream you may not subscribe to, not an audited 403. A member asking for a co-member's private stream is the ordinary consequence of a page-wide broadcast, not an attack — auditing it would write an `authz.access.denied` row per member per assistant message and bury real signal. A genuine *page*-access violation still 403s and still audits.\n\nTwo more, both in code this PR touches:\n- **`POST /api/ai/chat` conversationId is now authorized, not merely validated.** The history load is keyed on `(pageId, conversationId)` with no user filter, and `${pageId}-default` is *derivable from the page id* — so grandfathering it without an ownership check would have been a readable IDOR. It now also fails **closed** on legacy conversations (messages predating the `conversations` table have no row, so an existence check alone skipped the guard entirely).\n- **Takeover aborts as the stream's owner**, not the caller (Codex P1). The abort registry authorizes against the owner, so the caller's id was refused on every cross-user abort — leaving a shared conversation's other participant generating while a second generation started beside it.\n\n### AC7 — Disconnect-immunity is PRESERVED\n\n`request.signal` is still **not** wired into `streamText`; `run-agent-with-retry` and `stream-pipe-utils` still swallow writer errors. This is the foundation the whole architecture rests on: aborting on client disconnect would turn every reload into a lost, half-billed turn and make re-attach impossible by construction.\n\n---\n\n## Tests\n\nPure functions first (`shouldAttachStream`, `consumingChannels`, `isStreamRowLive`, `decideStreamTakeover`), then the properties that matter:\n\n- **Headline regression** — an own-session stream this context is *not* consuming (a reloaded tab) attaches like any other subscriber and reclaims the Stop button.\n- Own + consuming still skips (no double-render on a normal send); a *remote* stream on the same channel still attaches.\n- Snapshot→SSE boundary: no gap, no double-render (existing `skipReplayCount` coverage).\n- Stream completes with no client attached ⇒ assistant row persisted (execute-end durable path) ⇒ the next client to open the conversation sees it.\n- Second send while one is live ⇒ old stream aborted + reconciled; exactly one generation survives.\n- A stale/dead `streaming` row (crashed process) does **not** block a send and is **not** served as an active stream.\n- A pre-existing `-default` conversation loads its history and is adopted as identity.\n- `useAppStateRecovery`'s callback gate is evaluated at fire time (the test also demonstrates that the boolean form is captured at render — the bug).\n\n### Defects found by adversarial self-review (all fixed, all pinned by tests)\n\nTwo independent reviewers were run over the diff and converged on the same findings. The first push's AC5 guard was not merely incomplete — it was **wrong**:\n\n1. **The takeover never aborted a stream it misjudged as stale, but reconciled it anyway** → the running generation survived and a second one started beside it. The exact double-generation AC5 exists to prevent.\n2. **Reconcile lied about live streams** it couldn't abort, destroying their crash-recovery snapshot.\n3. **The heartbeat couldn't work**: it rode the parts checkpoint, and a long tool call pushes no parts.\n4. **IDOR**: ownership-blind validation on a guessable id.\n5. `consumingChannels` was a Set, not a refcount — GlobalAssistantView and SidebarChatTab co-mount on the same agent channel, and the first body to finish cleared the flag for the other.\n6. `isPersisted` was a one-way door; a 402 (the credit gate runs *before* the row is persisted) stranded the surface behind a load-failure banner. A 404 now walks it back.\n7. `joinFailed` leaked when `chat:stream_complete` beat the join rejection.\n8. Making `isPersisted` an effect dep meant the first send on a minted conversation re-ran the load-on-select effect for the same id, fetching a conversation whose first message wasn't written yet and calling `setMessages([])` over the optimistic bubble and the live stream. Two regression tests fail without the fix.\n\n## Verification\n\n```\ntsc --noEmit (web) → clean\nbun run lint → Tasks: 14 successful, 14 total (✔ No ESLint warnings or errors)\nbun run test:unit → @pagespace/lib: 7545 passed | 6 skipped (345 files, 0 failed)\n web: 12515 passed | 6 skipped (847 files passed)\n```\n\nThe 3 remaining web failures (`activity-tools`, `admin-role-version`, `grouping` — 16 tests) are **pre-existing and unrelated**: they need a Postgres role that doesn't exist in this environment, plus one timezone-dependent test. I reproduced the identical 16 failures on a clean `origin/master` worktree to confirm.\n\n🤖 Generated with [Claude Code](https://claude.com/claude-code)\n\nhttps://claude.ai/code/session_016ie3Bmn3sgiUJ7a6ErwEc4\n\n\n\n\n> [!WARNING]\n> ## Review limit reached\n> \n> `@2witstudios`, you've reached your PR review limit, so we couldn't start this review.\n> \n> **Next review available in:** **34 minutes**\n> \n> Enable **[usage-based reviews](https://app.coderabbit.ai/settings/billing?tab=usage&orgId=c61fa3fc-d6a3-4c5c-b63e-af70a57ccb9d)** in Billing to review now. Otherwise, wait until the next included review is available.\n> You're only billed for reviews past your plan's rate limits ($0.25/file).\n> \n>

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\n> \n> * `apps/web/src/app/api/ai/chat/__tests__/stream-socket-events.test.ts`\n> * `apps/web/src/app/api/ai/chat/active-streams/__tests__/route.test.ts`\n> * `apps/web/src/app/api/ai/chat/active-streams/route.ts`\n> * `apps/web/src/app/api/ai/chat/route.ts`\n> * `apps/web/src/app/api/ai/chat/stream-join/[messageId]/__tests__/route.test.ts`\n> * `apps/web/src/app/api/ai/chat/stream-join/[messageId]/route.ts`\n> * `apps/web/src/app/api/ai/global/[id]/messages/__tests__/credit-gate.test.ts`\n> * `apps/web/src/app/api/ai/global/[id]/messages/__tests__/stream-socket-events.test.ts`\n> * `apps/web/src/app/api/ai/global/[id]/messages/route.ts`\n> * `apps/web/src/components/layout/middle-content/page-views/ai-page/AiChatView.tsx`\n> * `apps/web/src/components/layout/middle-content/page-views/ai-page/__tests__/AiChatView.test.tsx`\n> * `apps/web/src/components/layout/middle-content/page-views/dashboard/GlobalAssistantView.tsx`\n> * `apps/web/src/components/layout/right-sidebar/ai-assistant/SidebarChatTab.tsx`\n> * `apps/web/src/contexts/GlobalChatContext.tsx`\n> * `apps/web/src/contexts/__tests__/GlobalChatContext.test.tsx`\n> * `apps/web/src/hooks/__tests__/useAgentChannelMultiplayer.test.ts`\n> * `apps/web/src/hooks/__tests__/useAppStateRecovery.test.ts`\n> * `apps/web/src/hooks/__tests__/useChannelStreamSocket.test.ts`\n> * `apps/web/src/hooks/useAgentChannelMultiplayer.ts`\n> * `apps/web/src/hooks/useAppStateRecovery.ts`\n> * `apps/web/src/hooks/useChannelStreamSocket.ts`\n> * `apps/web/src/lib/ai/core/__tests__/stream-abort-client.test.ts`\n> * `apps/web/src/lib/ai/core/__tests__/stream-lifecycle.test.ts`\n> * `apps/web/src/lib/ai/core/__tests__/stream-liveness.test.ts`\n> * `apps/web/src/lib/ai/core/__tests__/stream-subscription-authz.test.ts`\n> * `apps/web/src/lib/ai/core/__tests__/stream-takeover.test.ts`\n> * `apps/web/src/lib/ai/core/stream-abort-client.ts`\n> * `apps/web/src/lib/ai/core/stream-lifecycle.ts`\n> * `apps/web/src/lib/ai/core/stream-liveness.ts`\n> * `apps/web/src/lib/ai/core/stream-subscription-authz.ts`\n> * `apps/web/src/lib/ai/core/stream-takeover.ts`\n> * `apps/web/src/lib/ai/shared/hooks/index.ts`\n> * `apps/web/src/lib/ai/shared/hooks/useChatTransport.ts`\n> * `apps/web/src/lib/ai/shared/hooks/useConversationIdentity.ts`\n> * `apps/web/src/lib/ai/streams/__tests__/consumingChannels.test.ts`\n> * `apps/web/src/lib/ai/streams/__tests__/isPlaceholderConversationId.test.ts`\n> * `apps/web/src/lib/ai/streams/__tests__/shouldAttachStream.test.ts`\n> * `apps/web/src/lib/ai/streams/consumingChannels.ts`\n> * `apps/web/src/lib/ai/streams/isPlaceholderConversationId.ts`\n> * `apps/web/src/lib/ai/streams/shouldAttachStream.ts`\n> * `apps/web/src/lib/repositories/conversation-repository.ts`\n> * `apps/web/src/lib/websocket/socket-utils.ts`\n> * `packages/db/drizzle/0200_strange_viper.sql`\n> * `packages/db/drizzle/meta/0200_snapshot.json`\n> * `packages/db/drizzle/meta/_journal.json`\n> * `packages/db/src/schema/ai-streams.ts`\n> \n>

\n> \n>

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\n\n\n_{Comment `@coderabbitai help` to get the list of available commands.}\n\n\n**_{_{![P1 Badge](https://img.shields.io/badge/P1-orange?style=flat)}} Abort streams with their owner, not the takeover user**\n\nIn a shared conversation, if user B sends while user A's generation is still running, this calls `abortStreamByMessageId` with B's user id. The abort registry authorizes aborts against the stream owner, so the call returns unauthorized, after which the row is still marked `aborted` and B's new stream starts while A's old generation continues editing/billing in the background. Select/pass the row's original `userId` (or use an internal abort path) so takeover actually stops live streams started by other participants.\n\nUseful? React with 👍 / 👎.\n**_{_{![P2 Badge](https://img.shields.io/badge/P2-yellow?style=flat)}} Do not skip aborting quiet but still-running streams**\n\nWhen a live generation is quiet for more than two minutes (for example during a long tool call, or before enough chunks arrive to hit the 20-part checkpoint), `isStreamRowLive` returns false and this takeover decision omits it from `abort`. The subsequent reconcile marks the DB row aborted, but the in-process abort controller is never signaled, so a second send can run concurrently with the still-running first stream and the old stream can later keep writing/tool-editing. Takeover should still attempt to abort every in-flight row that may be owned by this process, using liveness only to decide what to expose as resumable.\n\nUseful? React with 👍 / 👎.\n\n### 💡 Codex Review\n\nHere are some automated review suggestions for this pull request.\n\n**Reviewed commit:** `332c691e4e`\n \n\n

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\nCorrect, and fixed in `a70e1d1` — thank you, this was the sharpest finding on the PR.\n\nYou're right that the abort registry authorizes against the stream's **owner** (`stream-abort-registry.ts:141-143`), so passing the caller's id made the guard refuse every cross-user abort. On a shared conversation that meant user B's send left user A's generation running — still calling tools, still editing pages, still billing — while B's new generation started beside it. Exactly the double-generation this guard exists to prevent.\n\nThat IDOR guard exists for the *client-facing* `POST /api/ai/abort` endpoint. Takeover is not that: it's a trusted server-side path, and the caller's right to write to this conversation is already established upstream (page edit access, plus a new ownership/shared check on `conversationId` in the route). So `takeOverConversationStreams` now selects `aiStreamSessions.userId` and aborts **as the owner**:\n\n```ts\nconst owner = ownerByMessageId.get(messageId);\nif (!owner) continue;\nconst result = abortStreamByMessageId({ messageId, userId: owner });\n```\n\nThe `userId` parameter is gone from the function signature entirely, so there is no way to reintroduce the caller-id variant by accident. Pinned by a test that asserts the abort is issued with the owner's id and that the takeover actually succeeds: *\"given a live stream owned by ANOTHER user, should abort it as its OWNER so the takeover actually stops it\"* (`stream-takeover.test.ts`).\n\nRelated: the second half of what you describe — the row being marked `aborted` even when the abort was refused — is also fixed. `decideStreamTakeover` now only reconciles rows we can *prove* are finished (actually aborted, or provably dead). A live row we cannot stop is left alone and logged, because stamping `status='aborted', parts=[]` over a running stream hides it from every subscriber and destroys its only crash-recovery snapshot.\nAgreed and fixed — this was a genuine defect that defeated AC5, and my original code comment had the logic exactly backwards (it claimed misjudging a live row as stale was \"harmless\").\n\nTwo changes:\n\n**1. Liveness no longer gates the abort.** As you say, aborting an unknown `messageId` is free (`abortStreamByMessageId` returns `{aborted:false}`; it does not throw), whereas *skipping* an abort for a row we misjudged leaves a real generation running. The asymmetry is total, so `decideStreamTakeover` now returns **every** in-flight row in `abort`, and liveness is used only to decide what may be driven terminal:\n\n```ts\nabort: rows.map((r) => r.messageId),\nreconcile: rows\n .filter((r) => aborted.has(r.messageId) || !isStreamRowLive(r, now, staleAfterMs))\n .map((r) => r.messageId),\n```\n\nThat also fixes the reconcile half you flag: a row we could not abort but that is still beating is now **left alone**, rather than being stamped `aborted` while it keeps writing.\n\n**2. The heartbeat is now a real timer, not the parts checkpoint.** Your parenthetical is the root cause: a stream in a long tool call pushes *no parts at all*, so a checkpoint-driven heartbeat could never have covered it — no value of `PERSIST_EVERY_N_PARTS` would. `stream-lifecycle.ts` now writes `lastHeartbeatAt` on a 20s interval (cleared in `finish()`, `unref`'d), independent of `pushPart`. Without this the same quiet stream also vanished from `GET /active-streams` mid-flight, so no client could attach to it — which is what walked the user into sending again in the first place.\n\nTests pinning both: *\"given a row that LOOKS stale, should still attempt to abort it (a liveness guess must never gate the abort)\"*, *\"given a LIVE row we could not abort, should NOT reconcile it\"* (`stream-liveness.test.ts`), and *\"given a stream that pushes NO parts at all (a long tool call), should still beat\"* (`stream-lifecycle.test.ts`).",{},"created",1783804882.6481957,"Completing the task","event_type","info",{"_93":443,"_97":94,"_437":1203},{"_93":988,"_989":990},{"_93":963,"_964":965,"_966":967,"_968":969,"_970":-5},"pr","pr_title","docs(ai): clarify stream takeover abort policy and heartbeat behavior","pr_message","### Motivation\n- Align in-source documentation with implemented behavior so reviewers and maintainers understand that takeover attempts abort every in-flight stream and the heartbeat is timer-driven (not tied to parts checkpoint), which prevents double-generation and phantom/hidden live streams.\n\n### Description\n- Updated explanatory comments in `apps/web/src/lib/ai/core/stream-takeover.ts` to state that every in-flight row is attempted to be aborted and only rows proven finished are reconciled.\n- Updated explanatory comments in `apps/web/src/lib/ai/core/stream-liveness.ts` to document that `lastHeartbeatAt` is bumped by the stream lifecycle's dedicated heartbeat timer rather than the parts-checkpoint.\n\n### Testing\n- Ran `bun test apps/web/src/lib/ai/core/__tests__/stream-liveness.test.ts` which passed. \n- Running the broader test set (`bun test apps/web/src/lib/ai/core/__tests__/stream-liveness.test.ts apps/web/src/lib/ai/core/__tests__/stream-takeover.test.ts apps/web/src/lib/ai/core/__tests__/stream-lifecycle.test.ts apps/web/src/lib/ai/core/__tests__/stream-subscription-authz.test.ts`) surfaced unrelated environment/module resolution issues (missing `drizzle-orm`, `drizzle-orm/node-postgres`, and `@/lib/websocket`), so those failures are due to the test environment and not these documentation changes.","output_diff",{"_93":968,"_971":476,"_129":130,"_972":-5,"_312":973,"_974":975,"_976":977,"_978":979,"_980":981,"_982":539,"_983":984},"pre_apply_patch","repo_id","preapply_patch_base_commit_sha","diff --git a/apps/web/src/lib/ai/core/stream-liveness.ts b/apps/web/src/lib/ai/core/stream-liveness.ts\nindex 24171dc2f548a6802f6e7a0199a7617092a503a1..a20213814c4bcf3a544142dd255daa747c135281 100644\n--- a/apps/web/src/lib/ai/core/stream-liveness.ts\n+++ b/apps/web/src/lib/ai/core/stream-liveness.ts\n@@ -1,40 +1,40 @@\n /**\n * Liveness and takeover decisions for server-owned streams.\n *\n * Pure functions — no DB, no I/O. The callers (POST /api/ai/chat and\n * GET /api/ai/chat/active-streams) supply the rows and the clock.\n *\n * WHY LIVENESS IS A HEARTBEAT AND NOT A STATUS\n *\n * `ai_stream_sessions.status` cannot be trusted on its own. The terminal write\n * that flips it off `'streaming'` is fire-and-forget (see `stream-lifecycle.ts`)\n * and dies with the process, so a crashed or redeployed generation leaves a row\n * that says `'streaming'` forever. Anything that *blocks* on such a row (a 409\n * on concurrent send, say) would lock the user out of their own conversation.\n- * So we carry `lastHeartbeatAt`, bumped from the existing parts-checkpoint write,\n- * and treat a row with a stale heartbeat as dead.\n+ * So we carry `lastHeartbeatAt`, bumped by the stream lifecycle's dedicated\n+ * heartbeat timer, and treat a row with a stale heartbeat as dead.\n */\n \n /**\n * A row is live if it has beaten recently.\n *\n * The heartbeat is written on a fixed interval by the generation itself (see\n * STREAM_HEARTBEAT_INTERVAL_MS in stream-lifecycle.ts) — deliberately NOT off the\n * parts checkpoint. A stream sitting in a long tool call (sandbox exec, deep\n * research, a slow MCP tool) pushes no parts at all for minutes, so a\n * checkpoint-driven heartbeat would declare a perfectly healthy stream dead: it\n * would vanish from `/active-streams` (no client could attach to it) and the next\n * send would fail to stop it.\n *\n * The window below is several missed beats wide, so an ordinary GC pause or a slow\n * DB write never trips it, while a crashed process stops being served as a phantom\n * \"streaming\" ghost within a couple of minutes.\n */\n export const STREAM_HEARTBEAT_STALE_MS = 2 * 60 * 1000;\n \n export interface StreamLivenessRow {\n messageId: string;\n lastHeartbeatAt: Date | null;\n startedAt: Date;\n }\n \ndiff --git a/apps/web/src/lib/ai/core/stream-takeover.ts b/apps/web/src/lib/ai/core/stream-takeover.ts\nindex 6e79721b0b1257ec6ef1cc732dbacdd57cb2f20b..7572ae2dd4abd6fea7f81966d3afcdf7f73e1e5a 100644\n--- a/apps/web/src/lib/ai/core/stream-takeover.ts\n+++ b/apps/web/src/lib/ai/core/stream-takeover.ts\n@@ -1,38 +1,39 @@\n import { db } from '@pagespace/db/db';\n import { and, eq, inArray } from '@pagespace/db/operators';\n import { aiStreamSessions } from '@pagespace/db/schema/ai-streams';\n import { loggers } from '@pagespace/lib/logging/logger-config';\n import { abortStreamByMessageId } from '@/lib/ai/core/stream-abort-registry';\n import { decideStreamTakeover } from '@/lib/ai/core/stream-liveness';\n \n /**\n * Per-conversation in-flight guard for POST /api/ai/chat.\n *\n * Before a new generation starts on a conversation, any stream already in flight\n- * on that conversation is taken over: live ones are aborted, and every row is\n- * reconciled to a terminal status. The new generation then proceeds.\n+ * on that conversation is taken over: every row gets an abort attempt, and only\n+ * rows we can prove are finished are reconciled to a terminal status. The new\n+ * generation then proceeds.\n *\n * Without this, a second send simply starts a second generation on the same\n * conversation — two agents editing the same pages, two assistant rows, two\n * bills. (The only pre-existing limiter is the credit gate's per-USER\n * `maxInFlight`, which is per-user, not per-conversation, and is skipped\n * entirely for metering-exempt providers.)\n *\n * See `stream-liveness.ts` for why this is a takeover and not a 409.\n */\n export const takeOverConversationStreams = async ({\n conversationId,\n channelId,\n now = Date.now(),\n }: {\n conversationId: string;\n channelId: string;\n now?: number;\n }): Promise<{ aborted: string[]; reconciled: string[] }> => {\n try {\n const rows = await db\n .select({\n messageId: aiStreamSessions.messageId,\n // The stream's OWNER — not the caller. See the abort loop below.\n userId: aiStreamSessions.userId,\n lastHeartbeatAt: aiStreamSessions.lastHeartbeatAt,\n","external_storage_diff",{"_985":986,"_987":-5},"files_modified",2,"lines_added",5,"lines_removed",4,"commit_message","additional_parent_commit_shas",[],"file_id","file_00000000658471f7b018491f2b0d3997","ttl","partial_repo_snapshot","files",[991,992],{"_166":1092,"_994":-5,"_995":1093,"_997":-5},{"_166":993,"_994":-5,"_995":996,"_997":-5},"apps/web/src/lib/ai/core/stream-liveness.ts","contents","line_range_contents",[998],"missing_reason",{"_999":668,"_1000":1001,"_437":1002,"_1003":59},"line_range_start","line_range_end",108,[1004,1005,1006,1007,1008,1006,1009,1006,1010,1011,1012,1013,1014,1015,1016,1017,207,1004,1018,1006,1019,1020,1021,1022,1023,1024,1025,1006,1026,1027,1028,1017,1029,207,1030,1031,1032,1033,1034,207,1035,1036,1037,1038,1039,1040,1041,1042,1043,1044,207,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055,1046,1056,1057,1058,1048,1059,1060,1061,1062,1063,1064,1054,1065,1034,207,1004,1066,1006,1067,1068,1069,1070,1071,1006,1072,1017,1073,1074,1075,1076,1077,1078,1079,1080,1081,1082,1083,1084,1085,1086,1087,1088,1089,1090,1091,1044],"contains_end_of_file","/**"," * Liveness and takeover decisions for server-owned streams."," *"," * Pure functions — no DB, no I/O. The callers (POST /api/ai/chat and"," * GET /api/ai/chat/active-streams) supply the rows and the clock."," * WHY LIVENESS IS A HEARTBEAT AND NOT A STATUS"," * `ai_stream_sessions.status` cannot be trusted on its own. The terminal write"," * that flips it off `'streaming'` is fire-and-forget (see `stream-lifecycle.ts`)"," * and dies with the process, so a crashed or redeployed generation leaves a row"," * that says `'streaming'` forever. Anything that *blocks* on such a row (a 409"," * on concurrent send, say) would lock the user out of their own conversation."," * So we carry `lastHeartbeatAt`, bumped by the stream lifecycle's dedicated"," * heartbeat timer, and treat a row with a stale heartbeat as dead."," */"," * A row is live if it has beaten recently."," * The heartbeat is written on a fixed interval by the generation itself (see"," * STREAM_HEARTBEAT_INTERVAL_MS in stream-lifecycle.ts) — deliberately NOT off the"," * parts checkpoint. A stream sitting in a long tool call (sandbox exec, deep"," * research, a slow MCP tool) pushes no parts at all for minutes, so a"," * checkpoint-driven heartbeat would declare a perfectly healthy stream dead: it"," * would vanish from `/active-streams` (no client could attach to it) and the next"," * send would fail to stop it."," * The window below is several missed beats wide, so an ordinary GC pause or a slow"," * DB write never trips it, while a crashed process stops being served as a phantom"," * \"streaming\" ghost within a couple of minutes.","export const STREAM_HEARTBEAT_STALE_MS = 2 * 60 * 1000;","export interface StreamLivenessRow {"," messageId: string;"," lastHeartbeatAt: Date | null;"," startedAt: Date;","}","export const isStreamRowLive = ("," row: StreamLivenessRow,"," now: number,"," staleAfterMs: number = STREAM_HEARTBEAT_STALE_MS,","): boolean => {"," // Pre-heartbeat rows (written before the column existed) fall back to startedAt"," // so an in-flight stream mid-deploy isn't declared dead under its own feet."," const beat = row.lastHeartbeatAt ?? row.startedAt;"," return now - beat.getTime() < staleAfterMs;","};","export interface StreamTakeoverDecision {"," /**"," * Streams to attempt to abort. This is EVERY row, live-looking or not."," *"," * Aborting is free for a messageId the in-process registry doesn't know"," * (`abortStreamByMessageId` returns `{aborted:false}` — it does not throw), while"," * *skipping* the abort for a row we misjudged as dead leaves a real generation"," * running and starts a second one alongside it. The asymmetry is total, so we"," * never let a liveness guess gate the abort."," */"," abort: string[];"," * Rows to drive terminal. ONLY the rows we can prove are finished: the ones the"," * abort registry actually stopped, plus the ones whose heartbeat says the process"," * that owned them is gone."," * A row we could NOT abort and that still looks alive is deliberately left alone."," * Writing `status='aborted', parts=[]` over a still-generating stream would be a"," * lie with teeth: it hides the stream from `/active-streams` (so no client can"," * attach to it) and destroys the parts snapshot that is its only crash-recovery"," * copy — while the generation keeps running, keeps calling tools, and keeps"," * billing."," reconcile: string[];"," * TAKEOVER, NOT 409."," * A second send on a conversation that already has an in-flight stream must end with"," * exactly one generation running — but rejecting the send is the wrong way to get"," * there. It would self-lock the conversation behind any row whose terminal write"," * never landed (see above). So instead: try to abort everything in flight, drive"," * terminal what we provably stopped or that is provably dead, and proceed."," * Call this AFTER attempting the aborts, so the outcome of each abort is known.","export const decideStreamTakeover = ({"," rows,"," abortedMessageIds,"," now,"," staleAfterMs = STREAM_HEARTBEAT_STALE_MS,","}: {"," rows: StreamLivenessRow[];"," /** messageIds the in-process abort registry reported it actually aborted. */"," abortedMessageIds?: readonly string[];"," now: number;"," staleAfterMs?: number;","}): StreamTakeoverDecision => {"," const aborted = new Set(abortedMessageIds ?? []);"," return {"," abort: rows.map((r) => r.messageId),"," reconcile: rows"," .filter((r) => aborted.has(r.messageId) || !isStreamRowLive(r, now, staleAfterMs))"," .map((r) => r.messageId),"," };","apps/web/src/lib/ai/core/stream-takeover.ts",[1094],{"_999":668,"_1000":1095,"_437":1096,"_1003":59},125,[1097,1098,1099,1100,1101,1102,207,1004,1103,1006,1104,1105,1106,1107,1006,1108,1109,1110,1111,1112,1006,1113,1017,1114,1115,1116,1117,1078,1118,1119,1120,1121,1122,1123,1124,1125,1126,1127,1128,1129,1130,1131,1132,1133,1134,1135,1136,207,1137,207,1138,1139,1140,1141,1142,1143,1144,1145,1146,1147,1148,1149,1150,1151,1152,1153,1154,1155,1156,1157,1158,1159,1160,207,1161,1162,1163,1164,1165,1166,207,1167,1168,1169,1170,1171,1172,1173,1174,1175,1176,1160,207,1177,1178,1179,1180,1181,1182,1183,1184,1185,1186,1187,1188,1160,207,1189,1190,1191,1192,1193,1194,207,1195,1196,1197,1198,1199,1190,1200,1194,1201,1202,1044],"import { db } from '@pagespace/db/db';","import { and, eq, inArray } from '@pagespace/db/operators';","import { aiStreamSessions } from '@pagespace/db/schema/ai-streams';","import { loggers } from '@pagespace/lib/logging/logger-config';","import { abortStreamByMessageId } from '@/lib/ai/core/stream-abort-registry';","import { decideStreamTakeover } from '@/lib/ai/core/stream-liveness';"," * Per-conversation in-flight guard for POST /api/ai/chat."," * Before a new generation starts on a conversation, any stream already in flight"," * on that conversation is taken over: every row gets an abort attempt, and only"," * rows we can prove are finished are reconciled to a terminal status. The new"," * generation then proceeds."," * Without this, a second send simply starts a second generation on the same"," * conversation — two agents editing the same pages, two assistant rows, two"," * bills. (The only pre-existing limiter is the credit gate's per-USER"," * `maxInFlight`, which is per-user, not per-conversation, and is skipped"," * entirely for metering-exempt providers.)"," * See `stream-liveness.ts` for why this is a takeover and not a 409.","export const takeOverConversationStreams = async ({"," conversationId,"," channelId,"," now = Date.now(),"," conversationId: string;"," channelId: string;"," now?: number;","}): Promise<{ aborted: string[]; reconciled: string[] }> => {"," try {"," const rows = await db"," .select({"," messageId: aiStreamSessions.messageId,"," // The stream's OWNER — not the caller. See the abort loop below."," userId: aiStreamSessions.userId,"," lastHeartbeatAt: aiStreamSessions.lastHeartbeatAt,"," startedAt: aiStreamSessions.startedAt,"," })"," .from(aiStreamSessions)"," .where(and("," eq(aiStreamSessions.conversationId, conversationId),"," eq(aiStreamSessions.channelId, channelId),"," eq(aiStreamSessions.status, 'streaming'),"," ));"," if (rows.length === 0) return { aborted: [], reconciled: [] };"," // Abort EVERY in-flight row, without consulting liveness. An abort for a messageId"," // this process doesn't own is a no-op that returns `{aborted:false}`; SKIPPING an"," // abort for a row we wrongly judged dead leaves a real generation running and starts"," // a second one beside it. Only the outcome of these calls is trustworthy — never our"," // liveness guess. (`decideStreamTakeover().abort` encodes exactly this set: every"," // row. Iterating `rows` here is the same thing, and keeps the owner id in hand.)"," //"," // Abort as the stream's OWNER, not as the caller. `abortStream` refuses an abort"," // whose userId doesn't match the stream's — an IDOR guard that exists for the"," // client-facing POST /api/ai/abort endpoint. This is not that: it is a trusted"," // server-side path, and the caller's right to write to this conversation was already"," // established upstream (page edit access, plus the ownership/shared check on"," // conversationId in the route; the global route hard-throws on a foreign"," // conversation). Passing the caller's id would make the guard refuse every"," // cross-user abort, so on a SHARED conversation user B's send would leave user A's"," // generation running — still calling tools, still editing pages, still billing —"," // while B's new one started beside it. Which is the entire thing this guard exists"," // to prevent."," const aborted: string[] = [];"," for (const row of rows) {"," const result = abortStreamByMessageId({ messageId: row.messageId, userId: row.userId });"," if (result.aborted) aborted.push(row.messageId);"," }"," // Only NOW decide what may be driven terminal: what we actually stopped, plus what is"," // provably dead. A row we could NOT abort and that still looks alive belongs to"," // another web instance (the registry is single-process). It is still generating —"," // marking it 'aborted' and wiping its parts would hide a live stream from every"," // subscriber and destroy its only crash-recovery snapshot."," const { reconcile } = decideStreamTakeover({ rows, abortedMessageIds: aborted, now });"," if (reconcile.length > 0) {"," // Conditional on status so a stream that terminated on its own between the"," // SELECT and here isn't retroactively relabelled 'aborted'."," await db"," .update(aiStreamSessions)"," .set({ status: 'aborted', completedAt: new Date(), parts: [] })"," .where(and("," inArray(aiStreamSessions.messageId, reconcile),"," eq(aiStreamSessions.status, 'streaming'),"," ));"," const unstoppable = rows"," .map((r) => r.messageId)"," .filter((id) => !aborted.includes(id) && !reconcile.includes(id));"," if (unstoppable.length > 0) {"," // Known limitation, logged rather than papered over: the abort registry is"," // in-process, so a live stream owned by another web instance cannot be stopped"," // from here. It will finish and persist normally; this send runs alongside it."," loggers.ai.warn('AI Chat API: in-flight stream(s) could not be aborted from this instance', {"," conversationId,"," channelId,"," messageIds: unstoppable,"," });"," loggers.ai.info('AI Chat API: took over in-flight stream(s) on this conversation', {"," conversationId,"," channelId,"," aborted,"," reconciled: reconcile,"," });"," return { aborted, reconciled: reconcile };"," } catch (error) {"," // Never block the send on a failed takeover — the worst case is the"," // pre-existing behaviour (a concurrent generation), not a locked chat."," loggers.ai.warn('AI Chat API: stream takeover failed', {"," error: error instanceof Error ? error.message : 'unknown',"," return { aborted: [], reconciled: [] };"," }",[1204,1205,1206,1207,1208],{"_950":46,"_46":1215},{"_950":1210,"_166":1092,"_999":1214,"_1000":1211},{"_950":46,"_46":1213},{"_950":1210,"_166":993,"_999":1211,"_1000":1212},{"_950":46,"_46":1209},"\n* Committed the change on the current branch: `dc7cfa0 docs(ai): align stream takeover comments`.\n* Created a pull request with title: `docs(ai): align stream takeover comments`.\n\n**Testing**\n* ✅ `bun test apps/web/src/lib/ai/core/__tests__/stream-liveness.test.ts`\n* ⚠️ `bun test apps/web/src/lib/ai/core/__tests__/stream-liveness.test.ts apps/web/src/lib/ai/core/__tests__/stream-takeover.test.ts apps/web/src/lib/ai/core/__tests__/stream-lifecycle.test.ts apps/web/src/lib/ai/core/__tests__/stream-subscription-authz.test.ts` — warning due to environment/module resolution limitations: several imported test files could not resolve dependencies such as `drizzle-orm/node-postgres`, `drizzle-orm`, and `@/lib/websocket`; the liveness test file within the command passed.","repo_file_citation",14,15,"\n* Updated the liveness documentation to describe the dedicated heartbeat timer rather than the obsolete parts-checkpoint heartbeat wording. ",11,"### Summary\n* Updated the stream takeover documentation so it matches the current guard behavior: every in-flight stream gets an abort attempt, and only streams proven finished are reconciled. ",{"_93":313,"_42":85,"_97":313,"_1218":1219,"_1220":1221,"_1222":1223,"_133":-5,"_120":1224},[84],"input_items",[1241,1242,1243,1244,1245,1246,1247,1248],"external_post_config",{"_1225":1226,"_251":204,"_1227":293,"_262":-5,"_971":245,"_1228":-5,"_1229":1230,"_1231":1232,"_1233":-5,"_1234":-5,"_1235":1236,"_1237":15,"_1238":59,"_1239":54,"_1240":15},"user_model_slug","slug",1783804446.082088,"installation_id",87191384,"pr_number","review_trigger","comment_id",4948780099,"comment_type","issue","pr_write_guard_token","pending_pr_reaction_id","pending_comment_reaction_id",381425318,"comment_if_no_findings","comment_on_error","share_url","is_parallel_review",{"_93":443,"_97":313,"_437":1262},{"_300":301,"_302":303,"_1259":307,"_1260":130,"_309":-5,"_93":1261},{"_93":1249,"_302":1258,"_166":-5,"_1251":-5,"_1253":-5},{"_93":1249,"_302":1257,"_166":1092,"_1251":1252,"_1253":-5},{"_93":1249,"_302":1256,"_166":993,"_1251":1252,"_1253":-5},{"_93":1249,"_302":1255,"_166":-5,"_1251":-5,"_1253":-5},{"_93":1249,"_302":1254,"_166":1092,"_1251":1252,"_1253":-5},{"_93":1249,"_302":1250,"_166":993,"_1251":1252,"_1253":-5},"pull_request_comment","Agreed and fixed — this was a genuine defect that defeated AC5, and my original code comment had the logic exactly backwards (it claimed misjudging a live row as stale was \"harmless\").\n\nTwo changes:\n\n**1. Liveness no longer gates the abort.** As you say, aborting an unknown `messageId` is free (`abortStreamByMessageId` returns `{aborted:false}`; it does not throw), whereas *skipping* an abort for a row we misjudged leaves a real generation running. The asymmetry is total, so `decideStreamTakeover` now returns **every** in-flight row in `abort`, and liveness is used only to decide what may be driven terminal:\n\n```ts\nabort: rows.map((r) => r.messageId),\nreconcile: rows\n .filter((r) => aborted.has(r.messageId) || !isStreamRowLive(r, now, staleAfterMs))\n .map((r) => r.messageId),\n```\n\nThat also fixes the reconcile half you flag: a row we could not abort but that is still beating is now **left alone**, rather than being stamped `aborted` while it keeps writing.\n\n**2. The heartbeat is now a real timer, not the parts checkpoint.** Your parenthetical is the root cause: a stream in a long tool call pushes *no parts at all*, so a checkpoint-driven heartbeat could never have covered it — no value of `PERSIST_EVERY_N_PARTS` would. `stream-lifecycle.ts` now writes `lastHeartbeatAt` on a 20s interval (cleared in `finish()`, `unref`'d), independent of `pushPart`. Without this the same quiet stream also vanished from `GET /active-streams` mid-flight, so no client could attach to it — which is what walked the user into sending again in the first place.\n\nTests pinning both: *\"given a row that LOOKS stale, should still attempt to abort it (a liveness guess must never gate the abort)\"*, *\"given a LIVE row we could not abort, should NOT reconcile it\"* (`stream-liveness.test.ts`), and *\"given a stream that pushes NO parts at all (a long tool call), should still beat\"* (`stream-lifecycle.test.ts`).","side","RIGHT","line","Correct, and fixed in `a70e1d1` — thank you, this was the sharpest finding on the PR.\n\nYou're right that the abort registry authorizes against the stream's **owner** (`stream-abort-registry.ts:141-143`), so passing the caller's id made the guard refuse every cross-user abort. On a shared conversation that meant user B's send left user A's generation running — still calling tools, still editing pages, still billing — while B's new generation started beside it. Exactly the double-generation this guard exists to prevent.\n\nThat IDOR guard exists for the *client-facing* `POST /api/ai/abort` endpoint. Takeover is not that: it's a trusted server-side path, and the caller's right to write to this conversation is already established upstream (page edit access, plus a new ownership/shared check on `conversationId` in the route). So `takeOverConversationStreams` now selects `aiStreamSessions.userId` and aborts **as the owner**:\n\n```ts\nconst owner = ownerByMessageId.get(messageId);\nif (!owner) continue;\nconst result = abortStreamByMessageId({ messageId, userId: owner });\n```\n\nThe `userId` parameter is gone from the function signature entirely, so there is no way to reintroduce the caller-id variant by accident. Pinned by a test that asserts the abort is issued with the owner's id and that the takeover actually succeeds: *\"given a live stream owned by ANOTHER user, should abort it as its OWNER so the takeover actually stops it\"* (`stream-takeover.test.ts`).\n\nRelated: the second half of what you describe — the row being marked `aborted` even when the abort was refused — is also fixed. `decideStreamTakeover` now only reconciles rows we can *prove* are finished (actually aborted, or provably dead). A live row we cannot stop is left alone and logged, because stamping `status='aborted', parts=[]` over a running stream hides it from every subscriber and destroys its only crash-recovery snapshot.","\n### 💡 Codex Review\n\nHere are some automated review suggestions for this pull request.\n\n**Reviewed commit:** `332c691e4e`\n \n\n

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","**_{_{![P2 Badge](https://img.shields.io/badge/P2-yellow?style=flat)}} Do not skip aborting quiet but still-running streams**\n\nWhen a live generation is quiet for more than two minutes (for example during a long tool call, or before enough chunks arrive to hit the 20-part checkpoint), `isStreamRowLive` returns false and this takeover decision omits it from `abort`. The subsequent reconcile marks the DB row aborted, but the in-process abort controller is never signaled, so a second send can run concurrently with the still-running first stream and the old stream can later keep writing/tool-editing. Takeover should still attempt to abort every in-flight row that may be owned by this process, using liveness only to decide what to expose as resumable.\n\nUseful? React with 👍 / 👎.","**_{_{![P1 Badge](https://img.shields.io/badge/P1-orange?style=flat)}} Abort streams with their owner, not the takeover user**\n\nIn a shared conversation, if user B sends while user A's generation is still running, this calls `abortStreamByMessageId` with B's user id. The abort registry authorizes aborts against the stream owner, so the call returns unauthorized, after which the row is still marked `aborted` and B's new stream starts while A's old generation continues editing/billing in the background. Select/pass the row's original `userId` (or use an internal abort path) so takeover actually stops live streams started by other participants.\n\nUseful? React with 👍 / 👎.","\n\n\n> [!WARNING]\n> ## Review limit reached\n> \n> `@2witstudios`, you've reached your PR review limit, so we couldn't start this review.\n> \n> **Next review available in:** **34 minutes**\n> \n> Enable **[usage-based reviews](https://app.coderabbit.ai/settings/billing?tab=usage&orgId=c61fa3fc-d6a3-4c5c-b63e-af70a57ccb9d)** in Billing to review now. Otherwise, wait until the next included review is available.\n> You're only billed for reviews past your plan's rate limits ($0.25/file).\n> \n>

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\n\n\n_{Comment `@coderabbitai help` to get the list of available commands.}\n\n","base_ref","head_ref","pull_request_info",[1263],{"_950":46,"_46":1264},"## Convergence summary — what changed since the initial review\n\nFour adversarial review passes over this diff surfaced defects serious enough that the original AC5 guard was not merely incomplete, it was **wrong**. Flagging them here because the PR now differs materially from what was first reviewed, and two of them are security issues.\n\n### The AC5 guard was defeating itself\n\n1. **A liveness *guess* gated the abort.** The heartbeat rode the 20-part parts-checkpoint while the stale window was 2 minutes — so a stream inside a long tool call (>2 min, <20 parts) looked *dead*. `decideStreamTakeover` then put it in `reconcile` but **not** `abort`: the running generation was never stopped, and a second one started beside it. Precisely the double-generation the guard exists to prevent. Aborting an unknown `messageId` is free; *skipping* an abort is not — so every in-flight row now gets an abort attempt, unconditionally.\n2. **Reconcile lied about streams it couldn't stop.** A row whose abort was refused (cross-user) or not-found (another web instance) was still stamped `status='aborted', parts=[]` — hiding a **live** stream from every subscriber and destroying its only crash-recovery snapshot while it kept running, kept calling tools, and kept billing. Now only rows we can *prove* are finished get reconciled.\n3. **The heartbeat couldn't work.** A quiet tool call pushes no parts *at all*, so no checkpoint-driven heartbeat could ever have covered it. It's now a real 20s timer — capped at 15 min, because an unbounded beat on a lifecycle whose `finish()` never fired would be strictly *worse* than none (an immortal live-looking row that can never be reconciled or taken over).\n4. **Takeover aborted as the caller, not the stream's owner** (thanks @chatgpt-codex-connector — P1). The abort registry authorizes against the owner, so cross-user aborts were refused every time: on a shared conversation, B's send left A's generation running while B's started beside it.\n\n### Security\n\n5. **IDOR in the new `conversationId` validation.** The history load is keyed on `(pageId, conversationId)` with **no user filter**, and the id I was grandfathering — `${pageId}-default` — is *derivable from the page id*. Any member with edit access could read a co-member's private conversation. Now authorized (own or explicitly shared, and belonging to this page), and it fails **closed** on legacy conversations and on DB errors.\n\n6. **Stream subscription was authorized on page access alone** — pre-existing on master, but this PR is what makes streams a first-class subscribable entity, so it had to be answered. A page channel carries *every* conversation on the page, and conversations are **private by default**: `/active-streams` (which returns the buffered `parts` snapshot) and `/stream-join` (which streams the tokens) would hand a co-member's private conversation to anyone who could open the page.\n\n The fix is deliberately **not a new policy** — it's the existing one, finally applied to streams. `listConversations` already filters `WHERE conv.\"userId\" = $me OR conv.\"isShared\" = true`; subscription now enforces exactly that, so *what you can watch matches what you can list*.\n\n### One of my own fixes was a regression, and was reverted\n\nWhile restoring the sentinel's one deliberate property (\"concurrent openers share a conversation\"), I dropped the conversation filter whenever the conversation was unpersisted — which is the *normal* state of a fresh page, New Chat, and post-delete. That rendered every stream on the page channel, i.e. **other members' private conversations**, and gave a blank \"New Chat\" a Stop button wired to the old conversation. The property I was chasing *was* the leak. Reverted; scoping is unconditional.\n\n### Verification\n\n`tsc --noEmit` clean · `lint` clean (14/14) · `test:unit` — `@pagespace/lib` 7545 passed / 0 failed; `web` 12534 passed, 848 files. The 3 remaining web failures (`activity-tools`, `admin-role-version`, `grouping` — 16 tests) are **pre-existing**: they need a Postgres role absent from this environment plus one timezone-dependent assertion. I reproduced the identical 16 failures on a clean `origin/master` worktree to confirm they are not mine.\n\nEvery fix above is pinned by a test that fails without 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