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Checking Changes

Validates all code changes before committing by running format, lint, type, and unit test checks. Use after making backend (Python) or frontend (TypeScript) changes, before committing or finishing a work session.

streamlit Updated
Web & Frontend

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Checking Changes

Run at the end of a work session or after completing a set of changes — not after every small edit.

make check

This runs formatting, linting, type checking, Knip unused-export and unused-dependency analysis, and unit tests on all uncommitted files (staged, unstaged, and untracked).

Workflow

  1. Run make check
  2. If issues are found:
    • Fix the reported errors
    • Re-run make check
    • Repeat until all checks pass
  3. Only consider work complete when make check succeeds

Notes

  • E2E tests are not included by default; use E2E_CHECK=true make check to also run changed e2e tests
  • E2E snapshot mismatches can be ignored (they require manual updates)

streamlit/streamlit/tree/main/.claude/skills/checking-changes commit 089f42b55a

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Frequently asked questions

npx skillmds@latest add streamlit/checking-changes