Carlos Florêncio
72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
---
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id: "01-rendering-engine-marker"
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title: "Classify the rendering engine"
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status: done
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wave: 1
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depends_on: []
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plan: "plan.md"
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spec: "../../specs/ui/requirements/webkit-task-dialog-rendering.md"
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---
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# Task 01: Classify the Rendering Engine
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## Acceptance
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- Safari, WKWebView/WebKitGTK-shaped user agents, iOS branded browsers, and iPadOS desktop-mode
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Safari UAs classify as `webkit`, while Blink, WebView2, Firefox, unknown user agents, and
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iPadOS desktop-mode Chrome/Edge UAs carrying Blink tokens classify as `other`.
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- The document root receives `data-rendering-engine="webkit|other"` before boot-payload loading and
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React rendering, without persistence or a user-visible setting.
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- Classification failure falls back to `other` and does not block application startup.
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## TDD sequence
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1. Add table-driven classifier and marker-helper tests, then run the focused Vitest command and
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confirm RED because the helper does not exist.
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2. Implement the smallest pure classifier and marker helper that satisfies the cases.
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3. Call the marker helper from `src/main.tsx` before `loadBootPayload()`.
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4. Rerun the focused test and refactor only if naming or compatibility-token handling is unclear.
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## Files likely touched
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- `apps/web/lib/browser/rendering-engine.ts`
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- `apps/web/lib/browser/rendering-engine.test.ts`
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- `apps/web/src/main.tsx`
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- `docs/plans/webkit-task-dialog-rendering/plan.md`
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- `docs/plans/webkit-task-dialog-rendering/task-01-rendering-engine-marker.md`
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## Verification
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Run from `apps/web`:
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```bash
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pnpm test -- lib/browser/rendering-engine.test.ts
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```
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## Dependencies
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None.
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## Parallelism
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`sequential`. Task 02 consumes the exact root marker contract established here.
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## Inputs
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- Classification and failure-mode requirements in
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`docs/specs/ui/requirements/webkit-task-dialog-rendering.md`.
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- Existing early application bootstrap in `apps/web/src/main.tsx`.
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- Existing navigator-mocking pattern in `apps/web/lib/keyboard/utils.test.ts`.
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- Tauri's current macOS/Linux system-WebView boundary and Chromium/WebView2 exclusion requirement.
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## Risks
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- Desktop Chromium includes the `AppleWebKit` compatibility token; never use that token alone.
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- iOS Chrome/Edge/Firefox brand tokens do not imply Blink/Gecko on iOS and must remain WebKit.
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- Keep the helper DOM-injectable so unit tests do not need module-level global mutation.
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## Output contract
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Report the observed RED failure, classifier cases added, files changed, final focused test result,
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remaining UA-classification risks, and updated task/plan statuses in this conversation.
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