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Implementation guide for new Streamlit features. Use when adding new elements, widgets, or features that span backend, frontend, and protobufs.
默认使用会先检查来源的 Prompt；你也可以切换为直接命令，或下载本地副本。
决定是否安装前，请先阅读 SKILL.md，以及 SkillsMP 当前展示的配套文件。
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
直接命令不会经过审查 Prompt；运行前请先检查来源。
npx skills add https://github.com/whitphx/streamlit --skill implementing-new-features命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
Finalizes 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.
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.
基于 SOC 职业分类
正在显示 SKILL.md
| name | implementing-new-features |
| description | Implementation guide for new Streamlit features. Use when adding new elements, widgets, or features that span backend, frontend, and protobufs. |
Most features need implementation in three areas:
lib/streamlit/frontend/proto/New features should include:
lib/testse2e_playwright/Protobuf changes in proto/ then run make protobuf
proto/streamlit/proto/Element.protoBackend in lib/streamlit/
lib/streamlit/__init__.pyPython unit tests in lib/tests
uv run pytest lib/tests/streamlit/the_test_name.pylib/tests/streamlit/element_mocks.pyFrontend in frontend/
frontend/lib/src/components/core/Block/ElementNodeRenderer.tsxVitest tests in *.test.tsx
cd frontend && yarn vitest lib/src/components/elements/NewElement/NewElement.test.tsxE2E Playwright tests in e2e_playwright/
make run-e2e-test e2e_playwright/name_of_the_test.pyAutofix formatting and linting: make autofix
Verify the implementation: make check