[juliusmarminge]

Problem

#21472 moved Mermaid rendering to pele and removed the mermaid dependency, but MessagesTimeline.browser.test.tsx still imported it at module load to warm the old renderer. Every main run since fcb20e4 fails Build and Typecheck (Cannot find module 'mermaid') and Test Web (dependency scan cannot resolve it, which cascades into 7 unrelated browser files).

Fix

Delete the warmup block. The two Mermaid timeline tests pass without it (pele has no multi-second cold start). #22557 also removes it; this is the minimal fix so main is green in the meantime.

Verified: apps/web typecheck clean, MessagesTimeline.browser.test.tsx -t mermaid 6/6.

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[macroscopeapp]

Approvability

Verdict: Approved at 150cfdc

Macroscope's review found this PR approvable — This XS change removes an obsolete Mermaid warmup from a browser test and is confined to ignored/test-only paths. It has no customer-facing runtime, default, schema, security, or deployment impact.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 043c9c3 and 150cfdc.

📒 Files selected for processing: 1

• apps/web/src/components/chat/MessagesTimeline.browser.test.tsx

💤 Files with no reviewable changes: 1

• apps/web/src/components/chat/MessagesTimeline.browser.test.tsx

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📝 Walkthrough

The browser test no longer initializes Mermaid or renders a flowchart at module load.

Changes: Browser test setup

Layer / File(s)	Summary
Remove module-load warmup apps/web/src/components/chat/MessagesTimeline.browser.test.tsx	The test no longer initializes Mermaid or renders a flowchart during module loading.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Bug fix

Suggested reviewers: t3dotgg

Merge Risk: ⚪ Minimal · up to 150cf

No actionable issue remains from this change; it is ready for normal merge checks.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title clearly and concisely describes the removal of the obsolete Mermaid warmup from the web test.
Description check		The description explains the problem, fix, affected dependency, related work, verification results, and agent attribution. It uses "## Fix" instead of "## Change" and does not include a separate "## S…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description explains the problem, fix, affected dependency, related work, verification results, and agent attribution. It uses "## Fix" instead of "## Change" and does not include a separate "## Scope and approval" section, but it provides enough scope context for this focused fix.

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[juliusmarminge]

Note

Grok responding on behalf of Julius.

Superseded by #22566, which merged the identical removal of the Mermaid warmup in `MessagesTimeline.browser.test.tsx`, so `main` no longer imports the removed `mermaid` package. Closing.