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fix(mobile): isolate Markdown image requests - #154
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This repository does not receive automatic reviews because it has fewer than 10 stars. ⚙️ Run configurationConfiguration used: Organization UI Review profile: ASSERTIVE Plan: Pro Plus Run ID: 📝 WalkthroughWalkthroughAdds a local HTTP responder and mobile fixture for delayed Markdown image responses. Extracts URI-keyed image requests with request-local loading state and guarded callbacks. Adds Maestro scenarios for late success and late error after replacing image A with image B. ChangesMarkdown image race validation
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🔵 Low · up to The PR isolates Markdown image request state so stale callbacks no longer affect replacement images, but it also adds a build-selected mobile fixture that can replace normal navigation if enabled in a production configuration. The change is otherwise mergeable with explicit owner follow-up to enforce production exclusion and tighten the verification flow. Sequence Diagram(s)sequenceDiagram
participant Maestro
participant MarkdownImageRaceFixture
participant ThreadMarkdownImageRequest
participant Responder
Maestro->>MarkdownImageRaceFixture: start image A
MarkdownImageRaceFixture->>ThreadMarkdownImageRequest: render URI A
ThreadMarkdownImageRequest->>Responder: request image A
Maestro->>MarkdownImageRaceFixture: replace A with B
MarkdownImageRaceFixture->>ThreadMarkdownImageRequest: remount for URI B
ThreadMarkdownImageRequest->>Responder: request image B
Maestro->>Responder: release B with success
Responder-->>ThreadMarkdownImageRequest: blue PNG
Maestro->>Responder: release A with success or error
Responder-->>ThreadMarkdownImageRequest: late PNG or HTTP 500
ThreadMarkdownImageRequest-->>MarkdownImageRaceFixture: retain B state
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description explains the problem, implementation scope, blast radius, and verification results. It omits the template headings and checklist, but it provides the required substance and is mostly complete. Full details: Linked Issues checkExplanation The changes address issue Full details: Out of Scope Changes checkExplanation The changed files are limited to mobile Markdown image rendering, its deterministic verification fixture, and related responder tests. No unrelated web, desktop, server, persistence, contract, or product-identity changes are described. Full details: Docstring CoverageExplanation Docstring coverage is 8.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 7 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches 💡 2📝 Generate docstrings 💡
🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
✨ Simplify code
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✅ Action performedReview finished.
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Inline comments:
In @.maestro/markdown-image-race.yaml:
- Around line 1-6: Update the markdown-image-race flow to launch the app from a
clean state before waiting for markdown-image-race-replace by adding launchApp
with clearState enabled. Also expose the CLI fixture parameters through the
flow-level env map using FIXTURE_ORIGIN and FIXTURE_RUN_ID so the scripts
receive the supplied values.
In @.maestro/scripts/markdown-image-race-wait.js:
- Line 2: Update the URL construction in the markdown image race wait request to
encode FIXTURE_RUN_ID as a single path segment before concatenating it, matching
the behavior in MarkdownImageRaceFixture.tsx while leaving the other path
segments unchanged.
In `@scripts/mobile-markdown-image-race-responder.test.ts`:
- Around line 28-36: Update the parseFixturePath test cases to use an input that
preserves an actually empty runId and add coverage for the parser’s length
guards, duplicated-slash behavior, and late-error source b requiredOutcome
mapping. Ensure the tests exercise the !parts[1] responder guard and each
remaining decision branch rather than relying on filter(Boolean) to represent
missing segments.
In `@scripts/mobile-markdown-image-race-responder.ts`:
- Around line 136-140: Update the parked waiter flow around the waiters map and
request close handler to enforce a bounded deadline: if the matching image
request does not arrive in time, remove the response from its waiter set and
settle it with a distinguishable failure status so Maestro’s runScript fails
fast; preserve normal resolution when the image arrives and cleanup when the
client closes.
- Line 234: Update the direct-execution guard around main() to compare
import.meta.url with a URL-safe file URL derived from NodeProcess.argv[1] via
pathToFileURL, or use import.meta.filename where supported, so paths containing
spaces or non-ASCII characters still invoke main().
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ℹ️ Review info
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Configuration used: Organization UI
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Run ID: e8953abf-f870-4a45-837f-989cb4dd404b
📒 Files selected for processing (8)
.maestro/markdown-image-race.yaml.maestro/scripts/markdown-image-race-release.js.maestro/scripts/markdown-image-race-wait.jsapps/mobile/src/App.tsxapps/mobile/src/features/showcase/MarkdownImageRaceFixture.tsxapps/mobile/src/features/threads/ThreadFeed.tsxscripts/mobile-markdown-image-race-responder.test.tsscripts/mobile-markdown-image-race-responder.ts
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Final implementation decision record for 4e37711:
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Latest-head follow-up for cca838e:\n\n- Accepted the final Codex P2 finding.\n- Pending waiters now unregister on response close or request abortion, preserving open wait responses after the inbound request completes.\n- The focused responder test, scripts typecheck, targeted lint and formatting, and git diff --check passed.\n- CI run 33279211996 passed Check, Test, Mobile Native Static Analysis, and Release Smoke.\n- All review threads are resolved. |
1 participant
Why
Changing a Markdown image URI could leave request state shared across the old and new native image requests, allowing stale load or error work to affect the replacement.
Scope
Blast Radius
Mobile thread Markdown images and a compile-gated mobile verification fixture. No contracts, server runtime, persistence, web, or desktop rendering changes.
Verification
vp test run scripts/mobile-markdown-image-race-responder.test.ts packages/client-runtime/src/markdownImages.test.ts apps/mobile/src/features/threads/markdownImageSize.test.ts(58 passed)vp run --filter @kata-sh/code-mobile typecheckvp lintandvp fmt --checkverify-katacodepairing regressionCloses #143
Implemented with Codex GPT-5 using the Codex harness.
Summary by CodeRabbit
New Features
Bug Fixes
Tests