[vltbaudbot]

Problem

The "Performance Over Time" history chart tooltip shows the latest (today's) package manager versions for every data point, even when hovering over older historical data. For example, hovering over a data point from September might show pnpm v12.9.1 when that data was actually benchmarked against pnpm v10.x.

Fix

Each day's chart-data.json already includes a versions field. This PR:

1. Adds versionsByDate to the HistoryData type — a map of date → package manager versions
2. Extracts versions from each day's chart-data.json in the useHistoryData hook
3. Updates the tooltip formatter in HistoryChart to resolve versions from the hovered data point's date, falling back to current versions when historical version data is unavailable (older data predating the versions field)

The clickable legend at the bottom continues to show current (latest) versions, since it isn't associated with a specific date.

Files Changed

• app/src/types/history.ts — add versionsByDate field
• app/src/hooks/use-history-data.ts — collect versions from each day's response
• app/src/components/history-chart.tsx — use per-date versions in tooltip formatter

Summary by CodeRabbit

• Bug Fixes
  • History chart tooltips now show package-manager versions for the hovered date, falling back to current chart versions when historical versions aren’t available.
  • “pacquet” is now displayed by its correct name instead of “pnpm (v12).”
  • Value formatting remains unchanged: per-package values use one decimal place and ms/pkg; other values use two decimal places and seconds.
• Changes
  • Pacquet is no longer included in benchmark runs or the default benchmark package-manager list.

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📒 Files selected for processing (16)

• app/src/lib/utils.ts
• scripts/setup.sh
• scripts/variations/build-cache.sh
• scripts/variations/build.sh
• scripts/variations/cache+lockfile+node_modules.sh
• scripts/variations/cache+lockfile.sh
• scripts/variations/cache+node_modules.sh
• scripts/variations/cache.sh
• scripts/variations/ci+setup.sh
• scripts/variations/ci.sh
• scripts/variations/clean.sh
• scripts/variations/common.sh
• scripts/variations/lockfile+node_modules.sh
• scripts/variations/lockfile.sh
• scripts/variations/node_modules.sh
• scripts/variations/run.sh

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📝 Walkthrough

Walkthrough

History data now includes package-manager versions keyed by date. The history chart tooltip uses the hovered date’s versions to format its label and falls back to current chart versions when historical versions are unavailable.

Changes

Historical chart versions

Layer / File(s)	Summary
Capture versions by date app/src/types/history.ts, app/src/hooks/use-history-data.ts	HistoryData now includes a date-keyed package-manager versions map. The hook stores nonempty versions from successful responses and passes the map to setHistoryData. The concurrency-limited Promise.all call is reformatted without a behavior change.
Format tooltip labels app/src/components/history-chart.tsx	The tooltip derives the package-manager key from the series data key and uses versions for the hovered date. It falls back to current chart versions when historical versions are unavailable.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: 🔵 Low · up to da51a

Some history tooltips may omit a package-manager version when that date has only partial version data. This is a bounded display issue and does not block merging.

Security Architecture Review

Security architecture risk: ⚪ Minimal · up to da51a

The change carries historical version information into chart labels without adding a new fetch destination or privilege boundary. Historical values and versions are published together, and version labels remain text rendered by React. No material security risk was found in the changed flow.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — On the inspected changed path, control over historical version metadata affects chart labeling and rendering in the viewer’s browser. The PR does not turn that metadata into a request destination, credential, authorization decision or executable HTML.

Trust Boundaries and Controls

• observed — Version objects are accepted from parsed historical JSON after an existence and nonempty-object check, rather than runtime schema validation. The relevant output control is React text rendering. The neighboring raw style-generation sink consumes chart keys and colors, not the newly selected historical version label.

Resilience and Maintainability Implications

• observed — The added map is local to each fetch run and is published with dates and numeric variations in one state update. Failed requests remain excluded from both datasets, and fewer than two successful dates still clear history. The full PR comparison leaves cancellation, retry and stale-run behavior unchanged, so existing lifecycle limitations are not new architecture concerns.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: showing package-manager versions for the hovered date in the history chart tooltip.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
Review comments at @app/src/components/history-chart.tsx:
- Line 298: Update the version selection in the history chart to use
dateVersions only when it contains a version for pmKey; otherwise, fall back to
chartData.versions. Keep the existing behavior when the historical record
includes that package manager’s version.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
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• Run ID: 0df6cef7-30f9-4b69-aa1a-467ed1c99fde

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📒 Files selected for processing (3)

• app/src/components/history-chart.tsx
• app/src/hooks/use-history-data.ts
• app/src/types/history.ts

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