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.
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- Repository
- streamlit/streamlit
- Last source activity
- August 21, 2026 at 16:49
- Detected SKILL.md language
- English
- Stars
- 46,005
- Forks
- 4,424
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- checking-changes
- description
- 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.
# Checking Changes
**Run at the end of a work session** or after completing a set of changes — not after every small edit.
```bash
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)
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