## Summary

Adds a new skill, `dyad:deflake-e2e-from-run`, for root-causing E2E
failures from a specific CI run by reading the Playwright HTML report
artifacts directly — traces, screenshots, error-context, and app
stdout/stderr — instead of rebuilding and rerunning locally.

This complements the existing `deflake-e2e` and
`deflake-e2e-recent-commits` skills, which drive *discovery* by
repeat-running tests. This new skill is for when you already have a
failing run and want to root-cause fast.

## What the skill covers

- Downloading the merged `html-report` artifact with `gh run download -R
dyad-sh/dyad -n html-report`.
- `jq` queries against `results.json` for `unexpected` vs `flaky` test
buckets.
- Matching trace `.zip` hashes (paths in `results.json` are CI-side;
files are local in `/tmp/pw-report/data/`).
- Reading `test.trace` as JSONL to extract the step timeline.
- Correlating with app IPC logs that show up as `stderr`/`stdout` trace
events (gold for race-condition root-causing — e.g. `(proposal_handlers)
› IPC: get-proposal returned: …` at failure time).
- A short playbook of common failure shapes (disabled-button-after-fill,
navigation races, cross-test state) and their usual fixes.

Derived from the workflow used to root-cause #3246.

## Test plan

- [x] Skill file follows the same frontmatter format as existing skills
in `.claude/skills/`.
- [x] Verified via the use case in #3246 (full investigation done
end-to-end using exactly these steps).

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Co-authored-by: Will Chen <7344640+wwwillchen@users.noreply.github.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>