Add landing page + Starlight docs site (#375)

* udpated matrix * feat(site): add landing page + Starlight docs site Astro + Starlight site in site/ — a flat/paper editorial landing page plus 18 docs pages seeded from the README. Monochrome theme, hairline rules, square corners, live GitHub star count, light default + dark toggle. Deploys to GitHub Pages via .github/workflows/deploy-site.yml. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-24 13:21:25 -05:00
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+---
+title: Affected Tests in CI
+description: Run only the tests a change actually touches.
+---
+
+`codegraph affected` traces import dependencies transitively to find which test files are affected by a set of changed source files — so CI can run only the relevant tests.
+
+```bash
+codegraph affected src/utils.ts src/api.ts          # pass files as arguments
+git diff --name-only | codegraph affected --stdin    # pipe from git diff
+codegraph affected src/auth.ts --filter "e2e/*"      # custom test-file pattern
+```
+
+## Options
+
+| Option | Description | Default |
+|---|---|---|
+| `--stdin` | Read the file list from stdin | `false` |
+| `-d, --depth <n>` | Max dependency traversal depth | `5` |
+| `-f, --filter <glob>` | Custom glob to identify test files | auto-detect |
+| `-j, --json` | Output as JSON | `false` |
+| `-q, --quiet` | Output file paths only | `false` |
+
+## CI / hook example
+
+```bash
+#!/usr/bin/env bash
+AFFECTED=$(git diff --name-only HEAD | codegraph affected --stdin --quiet)
+if [ -n "$AFFECTED" ]; then
+  npx vitest run $AFFECTED
+fi
+```