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* perf(hub,web): emit structured patches for session todos/teamState/metadata/agentState writes (#895, closes second half of #884) Today the four CLI handlers in `sessionHandlers.ts` that write session-scoped state (TodoWrite messages -> setSessionTodos; team-state deltas -> setSessionTeamState; update-metadata RPC; update-state RPC) emit `session-updated` events with no `data` payload. `syncEngine.handleRealtimeEvent` intercepts each one, re-reads the row from SQLite, and broadcasts the entire ~5KB Session via SSE. That works (the web client's `isSessionRecord` shortcut keeps the cache patched), but it costs a DB read and a full-payload SSE fan-out per write, and any failure mode that drops the broadcast data falls through to `useSSE.ts:509-512` and triggers per-session REST refetches - the storm vector documented in #884. This is the architectural follow-up to #885. #885 added `staleTime` on the detail query (eliminates focus / mount refetches inside a 30s window). This PR removes the structural reason these four writes touch the REST path at all. `SessionPatchSchema` learns four optional structured fields: - `todos` (array) - `teamState` (object) - `metadata` (versioned `{ version, value }` wrapper) - `agentState` (versioned `{ version, value }` wrapper) `.strict()` preserved so unknown keys still throw. The versioned wrappers mirror the existing socket.io `update-session` broadcast at lines 211 / 259 so metadata and agentState always travel as an atomic (version, value) pair - caches need the version to reject stale patches. Each of the four emit-sites now carries a structured `data` payload with the delta it just wrote. `syncEngine.handleRealtimeEvent` for `session-updated` events with non-empty patch data: applies the patch to the in-memory Session in place via the new `sessionCache.applySessionPatch`, then forwards the event as-is. Empty patches, no-data events, and patches against uncached sessions all fall back to the legacy `refreshSession` path so behavior for other emitters (e.g. `cursor/codexDesktop.ts`) is unchanged. Dedup hook against agent-session-id changes preserved on the fast path. `patchSessionDetail` is no longer a blanket spread - it enumerates each field explicitly so the versioned metadata / agentState patches can be unwrapped into the Session's flat (metadata, metadataVersion) and (agentState, agentStateVersion) pairs. Spreading the patch wholesale would have written a `{ version, value }` object into `session.metadata` and corrupted the cache. `patchSessionSummary` recomputes the touched derivations - `todoProgress` from todos, `pendingRequestsCount` / `pendingRequestKinds` from agentState, SessionSummaryMetadata from metadata - via three new pure helpers exposed from `shared/src/sessionSummary.ts` (`computeTodoProgress`, `computePendingRequestKinds`, `toSessionSummaryMetadata`). `toSessionSummary` is refactored to use these helpers - identical output, single source of truth. - shared: `SessionPatchSchema` parses each new patch shape, stays strict, rejects empty metadata without `version`, rejects full Session payloads (those go through `isSessionRecord`). - shared: summary derivation helpers covered against bare AgentState / Metadata inputs (the shape the SSE patch path provides). - hub: each emit-site asserted to carry the expected structured payload. - hub: `applySessionPatch` unit-tests cover todos / metadata / agentState application, empty-patch rejection (forces caller back to refreshSession), cross-namespace guard, and missing-session fallback. Empirical wire round-trip verifies each patch shape survives `JSON.stringify` intact and routes the web client through `getSessionPatch` (non-empty result) instead of the REST invalidation fallback. Per #884 expectation: with this fix on top of #885, idle GET /api/sessions/<id> rate is expected to drop to near-zero on the reporter's 100+ session install. Operator (heavygee) will attach the live-measured before / after to the PR post-merge. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(hub): snapshot metadata reference before applySessionPatch mutation so dedup-on-id-change fires The structured-patch fast path added in 05147a6a (closes #884 second half) broke the dedup-on-metadata-change trigger in handleRealtimeEvent. Root cause: applySessionPatch MUTATES the cached Session in place (reassigns session.metadata = patch.metadata.value). The dedup check compares before vs after agent session IDs, but `before = getSession(id)` and `after = getSession(id)` returned the SAME object reference, so before.metadata had already been overwritten by the time the check ran. hasSameAgentSessionIds always returned true and dedup silently never fired on the fast path. The legacy refreshSession path got dedup for free because it REPLACES the cache map entry with a new Session object, leaving the pre-refresh reference intact for the comparator. Fix: capture beforeMetadata before applySessionPatch runs; use it for both branches so the comparison contract is identical. Adds syncEngineHandleRealtimeEvent.test.ts with three regression guards: - structured metadata patch with changed cursorSessionId fires dedup - todos-only patch does NOT fire dedup (no false positives) - legacy refresh path (no patch data) still fires dedup Co-authored-by: Cursor <cursoragent@cursor.com> * fix(schemas): reorder SessionPatchSchema fields so soup-merge with codex-usage layer conflicts cleanly Pure reorder (no semantic change). feat/codex-usage-indicator-rebased adds a flat `metadata: MetadataSchema.nullable().optional()` + `metadataVersion` to SessionPatchSchema in the same line range upstream/main has the model/ modelReasoningEffort fields. My branch added the versioned `metadata` field at the END of the object, so git 3-way merge silently auto-merged both, producing an invalid object literal with duplicate `metadata` keys. By placing my `metadata` / `agentState` / `todos` / `teamState` insertions in the SAME line range codex inserts (between updatedAt and model), git now raises an explicit CONFLICT during the soup merge, which can be resolved correctly once and replayed by rerere. No behavior change on a clean upstream/main merge. Pure cosmetic; no test or runtime impact. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(sse): propagate TeamDelete clear through structured patch path Closes PR #897 Major review (HAPI Bot, 2026-06-13): TeamDelete events drove `applyTeamStateDelta` to return `null`, but the emit-site coalesced that to `undefined`. JSON serialization then dropped the key, the hub cache skipped its assignment branch (`patch.teamState !== undefined` was false), and the web client saw an empty patch and fell back to REST invalidation — exactly the storm path this PR was supposed to close. Sidebar / NotificationHub / dedup all served stale team state until the next full refresh. Fix in four coordinated places (wire ↔ cache contract): - shared/src/schemas.ts: `teamState: TeamStateSchema.nullable().optional()` so `null` is a valid wire shape meaning "cleared". Comment documents the discriminator contract for consumers. - hub/src/socket/handlers/cli/sessionHandlers.ts: drop the `?? undefined` coalesce so `null` survives JSON serialization. - hub/src/sync/sessionCache.ts (applySessionPatch): use `Object.prototype.hasOwnProperty.call(patch, 'teamState')` to discriminate "field absent" from "field is null", then map null → undefined to match the cached `Session.teamState` type. - web/src/hooks/useSSE.ts (patchSessionDetail): same hasOwnProperty discriminator + null → undefined mapping. Regression tests: - schemas.sessionPatch.test.ts: `{ teamState: null }` parses successfully (locks the wire contract). - sessionCache.applySessionPatch.test.ts: TeamDelete clears cached teamState; todos-only patch leaves teamState untouched (guards the hasOwnProperty branch against a regression back to `!== undefined`). Co-authored-by: Cursor <cursoragent@cursor.com> * fix(sse): version-gate metadata/agentState patches against cache regression Closes PR #897 follow-up Major review (HAPI Bot, 2026-06-16): the new structured SSE patch path unwraps versioned metadata/agentState fields without checking the cached metadataVersion/agentStateVersion. SSE reconnects + the existing per-query invalidation can leave a detail cache repopulated by a fresh REST refetch BEFORE a buffered older patch replays. Without the gate the older patch overwrites the newer cache, regressing resume / session-id / pending-requests state. Mirrors the hub-side CLI room handler contract (`incoming.version > currentVersion`, `web/src/hooks/useSSE.ts`): - `patchSessionDetail`: gate metadata/agentState assignment behind `isNewerVersionedPatch(patch.version, nextSession.<field>Version)`. The pre-patch version is captured by `{ ...previous.session }` so the comparison is against the cache-at-write-time. - `patchSessionSummary`: read the detail cache (via queryClient) for the canonical metadataVersion / agentStateVersion. Use `>=` (not `>`) because the callsite runs `patchSessionDetail` first — when detail accepts a newer patch the cache already holds the new version, so matching `>=` keeps summary aligned with detail's acceptance; when detail rejects, `>=` aligns summary with detail's rejection. - Exported `isNewerVersionedPatch(patchVersion, currentVersion)` as a pure helper so the rule is unit-testable in isolation. - Test: `useSSE.test.ts` pins the 4 cases (newer ✓ / older ✗ / same-version ✗ / first-write currentVersion=0 ✓). Hub-side `applySessionPatch` does NOT need the same gate: in-process events from `handleUpdateMetadata` / `handleUpdateState` are emitted only AFTER the optimistic-concurrency check at the store layer succeeds, and `syncEngine.handleRealtimeEvent` consumes them synchronously in order. The vulnerability is the SSE reconnect/replay window on the web client. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(sse): include updatedAt in structured patches + pendingRequests summary Closes PR #897 post-rebase bot review (HAPI Bot, 2026-06-18): Major — structured patches dropped session.updatedAt. TodoWrite, teamState, metadata, and agentState DB writes all touch sessions.updated_at, but the fast path forwarded only field deltas. Hub/web caches and session list ordering stayed stale until a full refresh. All four emit-sites in sessionHandlers now reload the stored row after a successful write and include updatedAt in the SSE patch payload (applySessionPatch already applies it via Math.max). Minor — agentState summary patches updated pendingRequestsCount/kinds but left pendingRequests stale, so SessionAttentionIndicator tooltips showed old request tools after an SSE patch. patchSessionSummary now uses computePendingRequestsCount + computePendingRequests alongside the existing kinds helper. Tests: sessionHandlers.test.ts asserts updatedAt on todos/metadata/agentState patches. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(web,hub): apply serviceTier in structured session patch path Closes PR #897 bot Minor (2026-06-18): field-by-field patchSessionDetail stopped copying serviceTier after the spread refactor, so Codex Fast/ Standard could show stale tier until a full refetch. Mirror nullable hasOwnProperty handling in patchSessionDetail and hub applySessionPatch. Co-authored-by: Cursor <cursoragent@cursor.com> * test(hub): allow same-ms updatedAt on structured patch emit asserts Date.now() resolution makes create+update land on the same millisecond in unit tests; the store still touches updated_at. Use >= so CI is not flaky. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(web): refuse versioned summary SSE patches without detail version source When session detail is not cached, defaulting metadata/agentState versions to 0 let stale buffered patches overwrite a freshly refetched list and suppress list invalidation. Bail out so the list refetches instead. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(web): keep updatedAt monotonic when applying SSE session patches Stale versioned metadata/agentState replays can still carry an older updatedAt. Use Math.max on detail and summary paths so rejected replays cannot rewind list/detail clocks while patched=true suppresses invalidation. Co-authored-by: Cursor <cursoragent@cursor.com> * chore: retrigger Codex PR review after infra stream failure Prior pr-review run died on reconnect (stream closed before response.completed); no code findings. Empty commit to re-fire pull_request_target. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(web): compare all summary metadata fields in keep-alive skip isRenderIrrelevantPatch omitted path/machineId/flavor/worktree, so a same-ms metadata patch could be dropped while summaryPatched stayed true and list invalidation never repaired grouping/icon/path. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(sse): version-wrap todos/teamState patches for dual-SSE races Global + session EventSources can deliver out of order. Carry store todos_updated_at / team_state_updated_at as patch versions, gate web applies, and tighten keep-alive skip compares (metadata + request tool/kind). Co-authored-by: Cursor <cursoragent@cursor.com> * fix(web): put SSE version watermarks on SessionSummary Requiring a detail query to apply versioned list patches forced O(N) /sessions invalidation on every global SSE write. Gate against summary watermarks instead; skip no-op detail clones on duplicate deliveries. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(hub): ratchet todosUpdatedAt on rewind rebuild replaceSessionTodos was stamping the remaining TodoWrite's older createdAt, so a lagged pre-rewind structured SSE patch could resurrect deleted todos. Advance the watermark on force-replace instead. Co-authored-by: Cursor <cursoragent@cursor.com> * fix(web): apply copilotAgentMode in structured detail SSE patches Field-by-field detail mapper dropped the new Copilot keep-alive field, so detailPatched suppressed invalidation and SessionChat kept a stale mode. Co-authored-by: Cursor <cursoragent@cursor.com> --------- Co-authored-by: Cursor <cursoragent@cursor.com> Co-authored-by: Debian <heavygee@oos-linux.in.lockhouse>
hapi-web
React Mini App / PWA for monitoring and controlling hapi sessions.
What it does
- Session list with status, pending approvals, todos, and summaries.
- Chat view with streaming updates and message sending.
- Permission approval and denial workflows.
- Permission mode and model selection.
- Machine list and remote session spawn.
- File browser and git status/diff views.
- PWA install prompt and offline banner.
Runtime behavior
- When opened inside Telegram, auth uses Telegram WebApp init data.
- When opened in a normal browser, you can log in with
CLI_API_TOKEN:<namespace>(orCLI_API_TOKENfor the default namespace). - The login screen includes a top-right hub picker; if unset, the app uses the same origin it was loaded from.
- Live updates come from the hub via SSE.
Routes
See src/router.tsx for route definitions.
/- Redirect to /sessions./sessions- Session list./sessions/$sessionId- Chat interface./sessions/new- Create new session./sessions/$sessionId/files- File browser with git status./sessions/$sessionId/file- File viewer with diff support./sessions/$sessionId/terminal- Terminal interface./settings- Settings category hub (mobile) and responsive master-detail shell./settings/general- Language preferences./settings/display- Appearance, typography, colors, and session list preferences./settings/chat- Message input, tool card, and conversation color preferences./settings/voice- Everyday voice assistant preferences./settings/voice/voices- Full-page voice picker./settings/voice/advanced- Voice persona, tuning, and diagnostics./settings/usage- Cache-aware token usage dashboard for the hub owner./settings/about- Application links and version information.
Features
Session list (src/components/SessionList.tsx)
- Active/inactive status indicator.
- Session title from name, summary, or path.
- Todo progress display.
- Pending permission request count.
- Agent flavor label (claude/codex/gemini).
- Model mode display.
Chat interface (src/components/SessionChat.tsx)
- Message thread with infinite scroll.
- Composer for sending messages.
- Permission mode toggle (default/acceptEdits/auto/bypassPermissions/plan).
- Model selection (default/sonnet/sonnet[1m]/opus/opus[1m]).
- Session abort and mode switch controls.
- Context size display.
- Per-session scratchlist (
src/components/AssistantChat/ScratchlistPanel.tsx)- Workbench panel for held notes/drafts; distinct from the queue.
- Add/delete/reorder entries; promote to composer (copy) or queue (send).
- Persists across reloads via
localStoragekeyed per session. - Keyboard shortcut: Ctrl/Cmd+Shift+S to focus the add-input.
File browser (src/routes/sessions/files.tsx)
- Git status view (staged/unstaged files).
- File search with ripgrep.
- Navigate to file viewer.
File viewer (src/routes/sessions/file.tsx)
- File content display with syntax highlighting.
- Staged/unstaged diff view.
Terminal (src/routes/sessions/terminal.tsx)
- Remote terminal via xterm.js
- Real-time via Socket.IO
- Resize handling
Voice assistant
- ElevenLabs integration (@elevenlabs/react)
- Real-time voice control
- Standard and realtime composer dictation with provider capability selection
New session (src/components/NewSession/)
Modular session creation:
- Machine selector
- Directory input with recent paths
- Agent type selector
- Model selector
- Permission mode toggle (YOLO mode)
Authentication
See src/hooks/useAuth.ts and src/hooks/useAuthSource.ts.
- Telegram Mini App: Uses initData from WebApp SDK.
- Browser: Uses CLI_API_TOKEN from login prompt.
- JWT tokens with auto-refresh.
Data fetching
See src/hooks/queries/ for query hooks and src/hooks/mutations/ for mutations.
- Sessions, messages, machines via TanStack Query.
- Git status and file operations.
- Optimistic updates for message sending.
Real-time updates
See src/hooks/useSSE.ts.
- SSE connection to
/api/events. - Session/message/machine update events.
- Automatic cache invalidation on events.
Stack
React 19 + Vite + TanStack Router/Query + Tailwind + @assistant-ui/react + xterm.js + @elevenlabs/react + socket.io-client + workbox + shiki.
Source structure
src/router.tsx- Route definitions.src/components/- UI components.src/hooks/- Data fetching and state hooks.src/api/client.ts- API client.src/types/api.ts- Type definitions.
Development
From the repo root:
bun install
bun run dev:web
If testing in Telegram, set:
HAPI_PUBLIC_URLto the public HTTPS URL of the dev server.CORS_ORIGINSto include the dev server origin.
Tests
Unit tests run under vitest + jsdom:
bun run test:web
End-to-end browser tests for the scratchlist component (real Chromium, real
inert focus blocking, real localStorage round-trips) live at the repo root
under e2e/:
bun run test:e2e # headless
bun run test:e2e:ui # Playwright UI mode (debug)
The spec drives a Vite-served fixture page (web/e2e-fixtures/scratchlist-fixture.html)
that mounts the production ScratchlistPanel in isolation, so no hub /
auth / socket setup is required.
Build
bun run build:web
The built assets land in web/dist and are served by hapi-hub. The single executable can embed these assets.
Standalone hosting
You can host web/dist on a static host (GitHub Pages, Cloudflare Pages) and point it at any hapi hub:
- Build the web app. If your static host uses a subpath, set the Vite base:
bun run build:web -- --base /<repo>/
- Deploy
web/distto your static host. - Set hub CORS to allow the static origin (
HAPI_PUBLIC_URLorCORS_ORIGINS). - Open the static site, click the top-right Hub button on the login screen, and enter the hapi hub origin.
Clear the hub override in the same dialog to return to same-origin behavior.