// 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.
| name | 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. |
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, and unit tests on all uncommitted files (staged, unstaged, and untracked).
make checkmake checkmake check succeedsmake run-e2e-test e2e_playwright/<test>_test.py separately if neededFinalizes branch changes for merging by simplifying code, running checks, reviewing changes, and creating a PR if needed. Use when ready to merge changes into the target branch.
Creates a draft pull request on GitHub with proper labels, branch naming, and description formatting. Use when changes are ready to be submitted as a PR to the streamlit/streamlit repository.
Address all valid review comments on a PR for the current branch in the streamlit/streamlit repo. Use when a PR has received reviewer feedback that needs to be addressed, including code changes, style fixes, and documentation updates.
Debug Streamlit frontend and backend changes using make debug with hot-reload. Use when testing code changes, investigating bugs, checking UI behavior, or needing screenshots of the running app.
Lists available make commands for Streamlit development. Use for build, test, lint, or format tasks.
Implementation guide for new Streamlit features. Use when adding new elements, widgets, or features that span backend, frontend, and protobufs.