[teamleaderleo]

Summary

Tune the thread minimap's resting and current tick contrast to match the Codex reference measured by PR #20560. The first pass was approximately 25/255 too bright, so quiet ticks now use 0.28 opacity and current viewport ticks use 0.48; hover, focus, and bookmarks still reach full contrast.

This is a focused follow-up to #20560 and is based on feat/thread-minimap-codex.

Validation

• git diff --check
• Static CSS regression assertions passed with Bun.
• The repository's scoped Bun test could not start because this fresh worktree has no installed @base-ui/utils dependency; no source test failure was observed.

---

^{Need help on this PR? Tag @codesmith-bot with what you need.}

---

Summary by cubic

Tunes the thread minimap resting and current tick contrast to match the measured Codex reference. Quiet ticks now use 0.28 opacity and current viewport ticks 0.48, correcting the first pass which was about 25/255 too bright while hover, focus, and bookmark states still reach full contrast.

• Adds a static CSS regression test that locks in the reference opacities.
• Follows up on cmux-next: thread minimap matches the Codex rail; bookmarks show and jump #20560 and is based on feat/thread-minimap-codex.

^{Written for commit 74a6641. Summary will update on new commits.}

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[blacksmith-sh]

Found 5 test failures on Blacksmith runners:

Failures

Test	View Logs
GitHub-hosted runner label: .github/workflows/ intent-familiar-review.yml:21: runs-on: ubuntu-24.04	View Logs
GitHub-hosted runner label: .github/workflows/ pr-red-checks-comment.yml:16: runs-on: ubuntu-24.04	View Logs
test_scans_only_test_sources (main.CommandLine.test_scans_only_test_sources)/ test_scans_only_test_sources (main.CommandLine.test_scans_only_test_sources)	View Logs
test_scans_the_ui_test_sources (main.CommandLine.test_scans_the_ui_test_sources) (p ath='ios/cmuxUITests/ProbeTests.swift')	View Logs
two failed fetches then a success did not pass/ two failed fetches then a success did not pass	View Logs

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[github-actions]

Unclear: CI fast guards failed: no known signature; failed step: Run the fast guard tests.

CI failed on 74a664146e (run 38982093945 attempt 1): 2 code, 5 unknown.

Job	Verdict	Why
CI fast guards	unknown	no known signature; failed step: Run the fast guard tests
Fast static checks	code	a static check failed
guards / workflow-guard-tests / app-host-cache	unknown	no known signature; failed step: Validate iOS video recording failures
guards / workflow-guard-tests / preflight	unknown	no known signature; failed step: Validate macOS runner guards
guards / workflow-guard-tests / quality-determinism	code	a Python test failed
guards / workflow-guard-tests / release-tooling	unknown	no known signature; failed step: Validate retried Ghostty Zig package fetches
guards / workflow-guard-tests / release-ios	unknown	no known signature; failed step: Validate iOS simulator build-once contract

Matched log lines

Fast static checks: FAILED localization (0.92s)
guards / workflow-guard-tests / quality-determinism: FAIL: test_scans_only_test_sources (__main__.CommandLine.test_scans_only_test_sources)

Not re-run automatically: CI fast guards, Fast static checks, guards / workflow-guard-tests / app-host-cache, guards / workflow-guard-tests / preflight, guards / workflow-guard-tests / quality-determinism are not machine failures.

Written by scripts/ci/classify_failures.py (ci-failure-attribution.yml); signatures are its SIGNATURES table. A machine verdict is the runner's fault, not this PR's; yours means the failing file is one this PR changes, also red on main that main's latest full suite fails the same way, seen on other PRs that it failed on another pull request's run lately.

[github-actions]

CI fast guards failed on 74a664146e (https://github.com/manaflow-ai/cmux/actions/runs/38982093945). It does not block the merge; a red guard merged into main breaks it for every open PR.
The log named no failed step; see the run.

Agents: python3 scripts/ci/guard_attribution.py fix applies the mechanical fixes locally. This comment is updated in place on each push.