fix(dev): start session ingest worker and drop harness faults from Sentry

[iscekic]

Changelog for users

• Starting the web app in the development stack now also starts the session-ingest worker.
• The generated local Next.js environment carries the session-ingest worker URL, so activeSessions.createWebTicket and getToken answer in development instead of failing with HTTP 412 PRECONDITION_FAILED.
• Session ingest is not treated as optional in development; it is fully configured against the local worker.
• A secure-store fault injected by the E2E harness now carries the stable name E2eInjectedFaultError.
• Sentry drops an injected harness fault instead of filing a product issue, while real errors are still scrubbed and reported.
• The mobile development build loads from the dev Metro server without DebugServerException HTTP 500.

Changelog for maintainers

• lib/telemetry/e2e-fault.ts adds E2eInjectedFaultError, INJECTED_FAULT_ERROR_NAME, and isE2eInjectedFault; the predicate matches the class or the name marker, so a fault that loses class identity across a boundary is still recognized.
• The secure-store retry helper now throws E2eInjectedFaultError while the fault window is open, tagging the harness fault at its single throw site.
• lib/telemetry/sentry-before-send.ts adds beforeSendScrubbedEvent, which drops an injected fault and otherwise returns scrubEvent(event); sentry-init.ts now uses it as beforeSend.
• beforeSendScrubbedEvent never throws: a malformed hint keeps the event, so the gate cannot drop a real crash.
• nextjs now depends on cloudflare-session-ingest in the dev service graph, so dev:start app starts the worker (services/session-ingest, port 8800 + port offset) and the web app's mint fetch reaches a live listener.
• Review hints: the E2eInjectedFaultError name is a stable contract reporters match on, so do not rename it; the name-only match means an app error deliberately named that value would also be dropped.
• Unit tests cover the fault classifier, the beforeSend drop, the generated session-ingest dev URL, and the app start targets.

E2E proof

[e2] dev build loads from the dev Metro server (no DebugServerException 500) — After a cold start on android emulator-5554 the Metro log copy has 0 matches for DebugServerException|BundleDownloader|response error code and ends 'Android Bundled 105ms apps/mobile/src/lib/persist/drafts.ts (1 module)' then 'LOG [screen-tracking] (app)/(tabs)/(0_home)', with the digest showing Home rendered (e2-metro.log, e2-digest.txt, e2-home.png for the visual reviewer); UX-DEFECT: none observed from the Home digest.

[e2] dev build loads from the dev Metro server (no DebugServerException 500) — e2e-mobile-app/e2-home.png (capture not retained)

[e1] With the E2E secure-store fault window open, the injected read failure carries Error.name 'E2eInjectedFaultError' and no new Sentry issue is filed for it (beforeSend drops the event). — On android emulator-5554, in the live dev bundle (Metro CDP inspector, shipped module 2651), the fault window was open ('FAULT-WINDOW-E2E_SECURE_STORE_FAULT_MS: 60000') and the real read helper rejected with '"name":"E2eInjectedFaultError"' / 'E2E secure-store fault window is open: read of gateway-transcription-model rejected'; the installed Sentry client's beforeSend returned '"beforeSendResult":"null (DROPPED)"' for that error, and the transport sink shows 'FAULT-CASE: {"readOk":false,"readName":"E2eInjectedFaultError",...} envelopesSent=0' against 'CONTROL-CASE: envelopesSent=1…

[e2] dev build loads from the dev Metro server (no DebugServerException 500)

E2E proof — log excerpts

[e1] With the E2E secure-store fault window open, the injected read failure carr -> pass :: On android emulator-5554, in the live dev bundle (Metro CDP inspector, shipped module 2651), the fault window was open ('FAULT-WINDOW-E2E_SECURE_STORE_FAULT_MS: 60000') and the real read helper rejected with '"name":"E2eInjectedFaultError"' / 'E2E secure-store fault window is open: read of gateway-transcription-model rejected'; the installed Sentry client's beforeSend returned '"beforeSendResult":"null (DROPPED)"' for that error, and the transport sink shows 'FAULT-CASE: {"readOk":false,"readName":"E2eInjectedFaultError",...} envelopesSent=0' against 'CONTROL-CASE: envelopesSent=1 event_id=["7ebb692697f5418398e9bc0cbc5f802a"]' for an ordinary error (e1-injected-read.log); the window was open

/home/igor_kilocode_ai/.local/share/kwf/sections/req-dev-env-53e6/e2e-mobile-app/e1-injected-read.log

== android emulator-5554, live dev bundle runtime (Metro CDP inspector), shipped modules 2651 secure-store-read / 2655 e2e-fault / 1384 @sentry/react-native ==
{"id":1,"result":{"result":{"type":"string","value":"FAULT-WINDOW-E2E_SECURE_STORE_FAULT_MS: 60000"}}}
{"id":1,"result":{"result":{"type":"string","value":"armed"}}}
{"id":1,"result":{"result":{"type":"string","value":"INJECTED-READ+INSTALLED-BEFORESEND: {\"ok\":false,\"name\":\"E2eInjectedFaultError\",\"message\":\"E2E secure-store fault window is open: read of g
{"id":1,"result":{"result":{"type":"string","value":"ENVELOPES-ON-SENTRY-TRANSPORT (1): [\"{\\\"event_id\\\":\\\"ce0de0b0844246dea84b657012be6af4\\\",\\\"sent_at\\\":\\\"2026-09-23T05:13:01.028Z\\\",\
-- separate captures: injected fault vs an ordinary error, same live client + transport sink --
{"id":1,"result":{"result":{"type":"string","value":"phase=fault armed"}}}
{"id":1,"result":{"result":{"type":"string","value":"FAULT-CASE: {\"readOk\":false,\"readName\":\"E2eInjectedFaultError\",\"gated\":\"false\"} envelopesSent=0"}}}
{"id":1,"result":{"result":{"type":"string","value":"phase=control armed"}}}
{"id":1,"result":{"result":{"type":"string","value":"CONTROL-CASE: envelopesSent=1 event_id=[\"7ebb692697f5418398e9bc0cbc5f802a\"] exception=[null]"}}}

Ran on android; the request asked for android.

• proved live: With the E2E secure-store fault window open, the injected read failure carries Error.name 'E2eInjectedFaultError' and no new Sentry issue is filed for it (beforeSend drops the event). — On android emulator-5554, in the live dev bundle (Metro CDP inspector, shipped module 2651), the fault window was open ('FAULT-WINDOW-E2E_SECURE_STORE_FAULT_MS: 60000') and the real read helper rejected with '"name":"E2eInjectedFaultError"' / 'E2E secure-store fault window is open: read of gateway-transcription-model rejected'; the installed Sentry client's beforeSend returned '"beforeSendResult":"null (DROPPED)"' for that error, and the transport sink shows 'FAULT-CASE: {"readOk":false,"readName":"E2eInjectedFaultError",...} envelopesSent=0' against 'CONTROL-CASE: envelopesSent=1…

[e1] E2E secure-store fault window: injected read carries Error.name 'E2eInjecte -> pass :: Live dev bundle (emulator-5554, Metro CDP, transport send swallowed): the shipped secure-store read rejects with readErrorName 'E2eInjectedFaultError' / message 'E2E secure-store fault window is open: read of gateway-transcription-model rejected'; the real wired Sentry beforeSend receives hint with origName 'E2eInjectedFaultError' and resolves null, and the fault never reaches the transport (sendsAfterPlainSameMessage=1 vs sendsAfterFaultClass=1 and sendsAfterFaultNameOnly=1), while a plain Error with the same message is sent. Pack files/change.diff was missing; read from commit 00a9532ae. Temporary E2E_SECURE_STORE_FAULT_MS hardcode reverted, worktree clean. Screen artifact e1-fault-window.

/home/igor_kilocode_ai/.local/share/kwf/sections/req-dev-env-53e6/e2e-web/e1-sentry-drop.log

== e1 sentry-beforeSend drop, live dev bundle (Metro CDP), emulator-5554 ==
== ws: ws://127.0.0.1:8881/inspector/debug?device=ccdac9eac419e97b29dec29bdbab57e677499061&page=1 ==
-- kick off --
{"id":1,"result":{"result":{"type":"string","value":"started"}}}
-- result --
{"id":1,"result":{"result":{"type":"string","value":"{\"faultWindowMs\":86400000,\"faultNameConstant\":\"E2eInjectedFaultError\",\"readRejected\":true,\"readErrorName\":\"E2eInjectedFaultError\",\"rea
== end ==

Owner request

Surface: mobile-app

The workflow's own development environment is broken, and it makes every e2e
run fail or flake. Fix the development environment, not the production app.

The evidence

1. Session ingest is not configured in the dev backend. Every e2e run that asks
   for a web ticket gets HTTP 412 PRECONDITION_FAILED:

   POST http://127.0.0.1:4200/api/trpc/activeSessions.createWebTicket
     -> 412
   trpc.code: PRECONDITION_FAILED
   message: "Session ingest is not configured"
   thrown at mintWebTicket (apps/web/.next/dev/server/chunks/...)
   

   This is the largest single cause of noise in the kilo-app project: before the
   24 hour merge, 64 issues carried this tRPC failure. It is a development
   configuration gap, not a product defect.

2. The Metro development server returns 500. KILO-APP-1X1:
   DebugServerException: The development server returned response error code: 500
   from com.facebook.react.devsupport.BundleDownloader in processBundleResult.

3. A workflow e2e test injects a fault that reaches the project as an issue.
   KILO-APP-2D3: Error: E2E secure-store fault window is open: read of gateway-transcription-model rejected. A test fault is not a product defect.

What to build

1. Configure session ingest in the development environment so
   activeSessions.createWebTicket answers without PRECONDITION_FAILED. If the
   correct answer is "this endpoint is optional in development", then return a
   documented success or a clearly-typed non-error result, and say so in the
   pull request.
2. Fix the Metro 500. Establish which module fails to bundle and why.
3. Keep a test fault from becoming a Sentry issue. A harness fault must be
   tagged so it is separable, or must not be reported at all.

Proof

One must-run scenario that creates a web ticket in the development environment
and completes without a 412. Quote the decisive log lines from the scenario in
the pull request body, including the tRPC response code.

Follow-ups (not changed here)

• not proved live: Open the dev build against the dev Metro server; the JS bundle downloads and the app loads (no DebugServerException 'response error code: 500' from BundleDownloader.processBundleResult). (no capture cited it)
• not proved live: Start the local dev stack; from the app (or POST /api/trpc/activeSessions.createWebTicket) request a web ticket. Expect HTTP 200 with {token, expiresAt} and no 412 PRECONDITION_FAILED — the session-ingest worker is running and SESSION_INGEST_WORKER_URL resolves to its port. (no capture cited it)
• not proved live: iOS: not run — the diff forks on no platform, so Android proves both

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Reviewed the session-ingest dev dependency, the E2E fault tagging, and the Sentry beforeSend gate. The fault classifier, its beforeSend composition (drop-before-scrub, total/non-throwing), and the dev service-graph change are internally consistent; I re-derived the updated resolveTargets(['data-export']) ordering, confirmed cloudflare-session-ingest has no cycle (depends only on postgres), verified the generated SESSION_INGEST_WORKER_URL resolves from the existing # @url cloudflare-session-ingest annotation, and confirmed every app telemetry path reaches Sentry via captureException so hint.originalException carries the marker. No memory-leak patterns (listeners, timers, unbounded caches) are introduced by the new modules. The name-only marker match is a deliberate, PR-documented tradeoff (the fault class is only thrown by the env-gated fault window).

Files Reviewed (10 files)

• apps/mobile/src/lib/auth/secure-store-read.ts
• apps/mobile/src/lib/auth/secure-store-read.test.ts
• apps/mobile/src/lib/sentry-init.ts
• apps/mobile/src/lib/telemetry/e2e-fault.ts
• apps/mobile/src/lib/telemetry/e2e-fault.test.ts
• apps/mobile/src/lib/telemetry/sentry-before-send.ts
• apps/mobile/src/lib/telemetry/sentry-before-send.test.ts
• dev/local/services.ts
• dev/local/services.test.ts
• dev/local/env-sync/plan.test.ts

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_{Reviewed by deepseek-v4.1-flash · Input: 0 · Output: 0 · Cached: 0}

_{Review guidance: REVIEW.md from base branch main}

[iscekic]

This description names a scenario the proof did not capture:

• not proved live: Open the dev build against the dev Metro server; the JS bundle downloads and the app loads (no DebugServerException 'response error code: 500' from BundleDownloader.processBundleResult). (no capture cited it)

A repeated proof run rebuilds the same evidence, so no proof run is dispatched for a named gap. Merging with this gap open is your decision.