The source of contributors.home-assistant.io: everything you need to contribute to Home Assistant, whether you write code, design, write documentation, translate, moderate, or run releases. It replaces developers.home-assistant.io, design.home-assistant.io, and data.home-assistant.io.
Want to fix or add a page? Start with Improve this contributor site. The rules for writing pages, front matter, areas, and the sidebar are in .github/copilot-instructions.md, also linked as AGENTS.md and CLAUDE.md. This README is for the moving parts around them.
You need Node.js 24 (see .node-version) and pnpm. Corepack picks the pnpm version from packageManager in package.json.
pnpm install
pnpm devOr skip the setup: open the repository in a dev container with VS Code or a GitHub Codespace. The configuration in .devcontainer/ installs Node.js, pnpm, and the dependencies, and forwards the port of the development server. In VS Code, Terminal > Run Task offers the common ones as tasks, like the development server and Pull request checks, which runs what CI runs.
Search only works on a build, because Pagefind creates its index afterwards:
pnpm build
pnpm previewBefore you open a pull request, run pnpm check, pnpm build, pnpm links, and pnpm structure. CI runs the same on every pull request. Netlify deploys the site, CI does not.
| Where | What |
|---|---|
src/content/docs/<area>/ |
The pages, one folder per area. Areas are defined in src/data/areas.ts. |
src/content/docs/glossary/ |
The glossary, one page per term. |
src/content/blog/ |
Blog posts. Authors are in src/data/authors.ts. |
src/content.config.ts |
The front matter every page may have, and its checks. |
src/lib/ |
The Markdown plugins and the logic behind the sidebar, share cards, and files for agents. Each file explains itself in its header. |
src/layouts/, src/components/ |
Layouts and UI. No framework: Astro components and small web components. |
src/data/ |
Site data, and the generated indexes of code symbols and source paths. |
demo-runtime/ |
The fake Home Assistant behind the live demos. |
public/components/, public/static/ |
The bundled frontend components of the demos. Generated, committed. |
redirects/ |
Old URLs and old heading anchors, and where they go now. |
scripts/ |
Every generator and check. Each one has its usage in its header. |
.github/ |
Workflows, issue and pull request templates, labels, skills, and the review checklists. |
| Script | What it does |
|---|---|
pnpm dev |
Writes the redirects and starts the development server. |
pnpm build |
The same, then builds the site to dist/ and the search index. |
pnpm preview |
Serves dist/. |
pnpm check |
Type-checks the site and the front matter of every page. CI runs it. |
pnpm links |
Checks every link, anchor, redirect, share card, and Markdown version in dist/. Needs a build. CI runs it. |
pnpm structure |
Checks that every area has the expected shape. CI runs it. |
pnpm clean |
Removes dist/ and the caches of Astro, for when something looks stale. |
pnpm redirects |
Writes public/_redirects and public/redirect-fragments.json from redirects/. The build runs it. |
pnpm fragments |
Maps old heading anchors to new headings in redirects/fragments.tsv. Needs a build. |
pnpm bashio |
Generates the Bashio reference from the source of Bashio. |
pnpm symbols |
Generates the indexes of code symbols, and their coverage, from core and frontend checkouts. Needs Python. |
pnpm source-paths |
Checks which repository paths the docs mention exist, and writes their index. |
pnpm tokens |
Syncs the design tokens from the frontend into src/styles/tokens.css. |
pnpm components |
Bundles the frontend components for the live demos. Slow. |
pnpm check:demos |
Type-checks demo-runtime/ against a frontend checkout. |
pnpm check:component-docs |
Compares the "In code" sections of the component pages with the frontend source. |
pnpm avatars |
Downloads missing GitHub avatars of blog authors. |
Most generators read a checkout next to this repository, like ../core or ../frontend, at origin/dev or the default branch. Run git fetch in it first.
The old sites redirect here. Each area has a map in redirects/, and overrides.tsv wins when two disagree. The build turns the maps into public/_redirects, which Git ignores. See scripts/generate-redirects.ts. After renaming headings that old links point to, run pnpm build and pnpm fragments, and review the new rows (scripts/generate-fragments.ts).
The function lists of the Bashio pages come from the docblocks in Bashio itself. The text around them lives in scripts/bashio/, and the script fails when a module is on no page. See scripts/generate-bashio.ts.
Inline code that names a class, function, or module of core or the frontend links to its source, with a card. A page uses the index of its area, and a mention only links when it can mean one thing. The rules are in src/lib/code-symbols.ts, the generator in scripts/generate-symbols.ts, and the coverage guess in scripts/symbols/coverage.ts. A weekly workflow opens a pull request when an index changed.
Inline code that is exactly a path in a repository the page is about, like homeassistant/helpers/, links to it on GitHub. The rules are in src/lib/source-paths.ts, the generator in scripts/generate-source-paths.ts. The weekly symbols workflow updates the index too.
The Design area shows real frontend components, bundled from the frontend source and committed, so a build never needs the frontend. scripts/build-components.ts explains the bundle, and the update-demos skill walks through a rebuild or a new component. Every Monday, a workflow rebuilds them from the frontend dev branch and opens a pull request. Another one runs scripts/check-component-docs.ts and keeps an issue open while the written reference drifts from the frontend.
Every page gets a 1200 by 630 PNG for link previews. src/lib/og.ts decides what is on a card, src/lib/og-render.ts how it looks. Cards are cached in node_modules/.cache/og/, and CI keeps that cache between runs.
The build writes /llms.txt, one per area, full-text versions, and a Markdown version of every docs page at <page URL>index.md. See src/lib/llms.ts and src/lib/markdown-export.ts. A new component in an MDX page fails the build until it has a Markdown version there.
Astro only renders a page again when the page changes. The glossary autolink, the code symbols, and the source paths plugins carry a fingerprint of their data, so a change there renders every page again, and pnpm dev restarts. See src/lib/glossary-autolink.ts. When a page still looks stale, run pnpm clean.
Every docs page ends with "Was this page helpful?". A vote goes to Plausible, and "Give feedback" opens the feedback form with the page filled in. See src/components/PageFeedback.astro.
The events page and the homepage show upcoming events from public calendar feeds, read at build time (src/lib/events.ts). A daily workflow starts a Netlify build so they stay current. A feed that can't be read never fails the build.
Colors, spacing, and typography come from the Home Assistant frontend. src/styles/tokens.css is generated by scripts/sync-tokens.ts: never edit it by hand. Which tokens components use is in the rules.
Rules live in .github/copilot-instructions.md. Workflows that apply them live in .github/skills/, also linked as .claude/skills, so Copilot and Claude Code read the same files. .github/instructions/ has the short checklists for Copilot code review. Skills link to the rules instead of repeating them: when you rename a section of the rules, update the skills and checklists that name it.