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bundle-analysis

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Bundle analysis. Use when measuring current bundle size, comparing stable or selected fixtures, inspecting composition, or cleaning retained comparison state.

repos/effect/.agents/skills/bundle-analysis/SKILL.md

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Last checked
Nov 4, 2026

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1,214
Repository last updated
Nov 8, 2026
License
MIT

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Read `packages/tools/bundle/README.md`, then select one workflow:

- **Stable comparison:** `pnpm bundle-compare <base-ref>`. Use `HEAD~1` for the
  latest commit. Read `tmp/bundle-stats.txt` and report non-zero differences.
- **Selected comparison:** `pnpm bundle-compare-selected --base <ref>
  scratchpad/<fixture>.ts`. Use only user-named or investigation-local fixtures;
  keep temporary fixtures out of the stable corpus.
- **Composition:** `pnpm bundle-analyze scratchpad/<fixture>.ts`. Read raw data
  first and report the largest modules, dependency groups, and surprising
  inclusions. Its readable-name output is not an exact size measurement.
- **Current size:** Build immediately before the direct bundle report so Effect
  packages resolve from current `dist` output.
- **Cleanup:** Stable comparisons retain `tmp/bundle-base` for reuse unless
  cleanup is requested. Remove selected-comparison state retained with
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