feat(ai): add detached /btw side questions - #2678
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📝 WalkthroughWalkthroughChangesDetached side question flow
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant User
participant ChatInput
participant SessionChatView
participant SideQuestionHook
participant BtwRoute
participant AIProvider
User->>ChatInput: Submit /btw question
ChatInput->>SessionChatView: Invoke side-question handler
SessionChatView->>SideQuestionHook: Start detached request
SideQuestionHook->>BtwRoute: POST conversationId and question
BtwRoute->>AIProvider: Stream answer from completed context
AIProvider-->>SideQuestionHook: Response chunks
SideQuestionHook-->>SessionChatView: Update side-question state
SessionChatView-->>User: Render SideQuestionCard
Merge Risk: 🟡 Moderate · up to Side answers can omit relevant results, use stale context, be disrupted during lifecycle changes, or mix overlapping responses. These issues should be corrected before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 8 functions across 10 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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- route: destructure validated body fields into consts so typeof narrowing survives inside the snapshot read closures (fixes the web build/typecheck failure: unknown not assignable to string) - route: emit authz.access.denied on auth-failure and conversation-inaccessible paths; register ai/btw in the AI_ROUTES_REQUIRING_DENIAL_AUDIT gate - useSideQuestion: send via fetchWithAuth so the session CSRF token is injected (bare fetch always 403'd against requireCSRF route); flush the streaming TextDecoder tail before clearing loading - tests: mock auditRequest, add denial-audit assertion
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Actionable comments posted: 8
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Inline comments:
In `@apps/web/src/app/api/ai/btw/route.ts`:
- Around line 5-6: Align the imports in the route with the approved web database
import contract: first expose both eq and conversations through the supported
package surface, or update the import rule to match the package’s actual
exports, then migrate this route without introducing imports that do not
compile.
In `@apps/web/src/components/agents/chat/SessionChat.tsx`:
- Line 121: Update SessionChatView’s side-question streaming flow around
useSideQuestion(conversationId) to register the detached stream with
useEditingStore when it starts, and clear that registration whenever the stream
settles or is dismissed. Preserve the existing rendering and lifecycle behavior
while ensuring active streaming is protected from revalidation and
authentication refresh.
In `@apps/web/src/components/ai/btw/SideQuestionCard.tsx`:
- Around line 5-9: Format the SideQuestionCard component and its nested JSX with
Prettier, preserving the existing props, rendering logic, accessibility
attributes, and styling.
In `@apps/web/src/components/ai/btw/useSideQuestion.ts`:
- Around line 20-21: Update useSideQuestion to add an effect cleanup keyed by
conversationId that aborts the current AbortController when the hook unmounts or
the conversation changes, reusing abortSideQuestion and the existing controller
ref.
- Around line 20-41: Update useSideQuestion so every setState updater in the ask
streaming flow, including decoder chunks and the final tail, first verifies
controller.current matches request.controller; ignore updates from superseded
requests while preserving updates for the active request.
In `@apps/web/src/lib/ai/btw/side-question.ts`:
- Line 25: Update the message snapshot mapper in the side-question flow to
include completed toolResults alongside each message’s role and content, using a
bounded representation consistent with MAX_MESSAGE_CHARS. Extend the snapshot
fixture/assertion to verify a completed result such as the existing output value
is included.
- Around line 29-31: Update the snapshot construction near the completed
transcript and PLAN sections to reserve space for the plan before applying
MAX_SNAPSHOT_CHARS. When the completed transcript exceeds the remaining budget,
retain its newest content rather than prefixing it, and ensure the plan remains
included within the final snapshot limit.
- Line 52: Update the side-question call to place the detached-response policy
in the system instruction, while moving snapshot and question into the user
prompt under distinct named delimiters. Preserve the existing detached-answer
constraints and ensure the user-provided and persisted content remains clearly
separated from the policy.
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CHANGELOG.mdapps/web/src/app/api/__tests__/security-audit-coverage.test.tsapps/web/src/app/api/ai/btw/__tests__/route.test.tsapps/web/src/app/api/ai/btw/route.tsapps/web/src/components/agents/chat/SessionChat.tsxapps/web/src/components/ai/btw/SideQuestionCard.tsxapps/web/src/components/ai/btw/__tests__/useSideQuestion.test.tsapps/web/src/components/ai/btw/useSideQuestion.tsapps/web/src/components/ai/chat/input/ChatInput.tsxapps/web/src/lib/ai/btw/__tests__/side-question.test.tsapps/web/src/lib/ai/btw/side-question.ts
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Review follow-ups (coderabbitai): - snapshot: serialize completed toolResults (bounded) — they were silently dropped even though the test fixture contained them - snapshot: reserve plan space and keep the NEWEST completed messages within the budget — the prefix slice dropped the newest context and could cut the plan entirely on long conversations - stream: move the detached-response policy into `system`, put snapshot/question in named delimiters (CWE-1427 prompt-boundary hygiene) - useSideQuestion: register the detached stream with useEditingStore via useStreamingRegistration (invisible to the central registrar, which derives from the primary pending-streams store only) - useSideQuestion: abort on unmount/conversation switch; guard every state update by request identity so a superseded request can't append into or settle the replacement card - SideQuestionCard: readable multi-line JSX Not changed: route imports of @pagespace/db/operators and @pagespace/db/schema/conversations — both are the established convention (100+ routes / 7 sibling AI routes).
This was referenced Sep 20, 2026
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Summary
/btw <question>as a detached, ephemeral side-question card on the shared agent chat surface/api/ai/btwpath with its own request ID andAbortController; dismissing it cannot abort the main streamTests
bun install --frozen-lockfilebun run --filter @pagespace/db buildbun run --filter @pagespace/lib buildapps/web: ../../node_modules/.bin/vitest run src/lib/ai/btw/__tests__/side-question.test.ts src/components/ai/btw/__tests__/useSideQuestion.test.ts src/app/api/ai/btw/__tests__/route.test.ts(6 passed)Integration notes
useChat/send lifecycle nor changes normal queue semantics oractiveStreamId.Merge order
Summary by CodeRabbit
New Features
/btwcommand for asking temporary side questions while an agent continues working.Bug Fixes