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CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Repository identity

JavaGuide is a content + docs site repo, not an application. It publishes a Chinese-language Java/AI backend interview & learning guide at https://javaguide.cn/ built with VuePress 2 + vuepress-theme-hope. Almost all work here is editing Markdown under docs/; the JS/TS under docs/.vuepress/ only configures the site.

The author/upstream is Snailclimb/JavaGuide. This clone tracks it read-only.

Git remotes & write policy (read this first)

  • origin → zys3198/JavaGuide (the user's fork — only this is writable, and even then per-change authorization required)
  • upstream → Snailclimb/JavaGuide (the official repo — NEVER push, open PRs, file issues, comment, or otherwise write without explicit per-action user authorization)
  • Pulling from upstream/origin to sync local is allowed. Default stance: this is a study clone, keep it in sync, don't push.

Toolchain

  • pnpm 10.0.0 is the pinned package manager (packageManager field). Don't use npm/yarn — pnpm-lock.yaml is authoritative.
  • Node 20+ recommended (VuePress 2 + Vite 7 bundler).

Commands

Task Command
Start dev server (hot reload) pnpm dev (alias for pnpm docs:dev)
Dev with cache wiped pnpm docs:clean-dev
Production build → dist/ pnpm build (alias for pnpm docs:build)
Build wiping .temp/.cache first pnpm build:clean
Lint everything pnpm lint
Lint markdown only pnpm lint:md
Format + check via prettier pnpm lint:prettier
Lint a single file pnpm markdownlint-cli2 path/to/file.md
Submit URLs to IndexNow (post-deploy) pnpm indexnow:submit --sitemap (needs INDEXNOW_KEY)
Rebuild DocSearch index pnpm docsearch:index
Upgrade VuePress theme pnpm update

There is no test suite — verification is pnpm build succeeding + visual check in the dev server.

Pre-commit hook

.husky/pre-commit runs pnpm nano-staged:

  • All files → prettier --write --ignore-unknown
  • Markdown → markdownlint-cli2

A commit that fails markdownlint or prettier will be blocked. Fix the lint errors rather than bypassing with --no-verify.

Markdown lint rules (.markdownlint-cli2.mjs)

Defaults on, with these notable relaxations — safe to rely on these:

  • MD010 (no hard tabs), MD013 (line length), MD036 (emphasis as heading), MD040 (fenced-code-language), MD045 (image alt), MD046 (code block style) — disabled
  • MD024 allows siblings with same heading text (different nesting)
  • *.snippet.md and TODO.md are ignored — snippets are markdown-include fragments, not full pages
  • ATX headings (#), dash bullets (-), --- thematic breaks are enforced

Site architecture (docs/.vuepress/)

  • config.ts — top-level VuePress config. Sets Vite bundler with SCSS preprocessor (sass-embedded), pagePatterns exclude *.snippet.md / TODO.md, alias for @vuepress/plugin-markdown-chart's Mermaid client, 百度统计 injected via head. Output dir is ./dist.
  • theme.ts (~470 lines) — the heart. Configures hopeTheme. Notable custom logic:
    • buildSeoDescription(page, app) generates <meta description> / OGP / JSON-LD descriptions on the fly, targeting a 150–160 char window, falling back through frontmatter.description → page title + headers + tags → excerpt/page text. Don't hand-write per-page descriptions unless overriding — the auto-builder is the source of truth.
    • JSON-LD ItemList blocks are injected for /, /home.html, /ai/, /cs-basics/ to feed search engines.
    • copyright plugin is disabled (upstream bug during hydration).
    • docsearch (Algolia) only activates when DOCSEARCH_APP_ID/DOCSEARCH_API_KEY/DOCSEARCH_INDEX_NAME env vars are all set; otherwise site search is off.
  • navbar.ts — top nav.
  • sidebar/index.ts (~600 lines) — the big one. Path-specific sidebar maps for /ai/, /ai-coding/, /cs-basics/, /open-source-project/, /books/, /about-the-author/, /high-quality-technical-articles/, /zhuanlan/, then a catch-all / covering Java/db/tools/framework/system-design/distributed/high-performance/high-availability. Order matters: more specific path prefixes must come before /. Helpers createImportantSection / createSourceCodeSection (from constants.ts) wrap grouped child entries.
  • sidebar/constants.ts — ICONS map and section-builder helpers; new sidebar entries should reuse these.
  • client.ts + components/ — client-side enhancements (LazyMermaid, ClickImagePreview, layout toggles).
  • styles/ — palette.scss (theme tokens), config.scss, index.scss.
  • public/ — static assets served as-is (logo, favicon).

Content layout (docs/)

Top-level directories are topic areas, mirroring the sidebar structure: java/ (basis/collection/concurrent/io/jvm/new-features), database/ (mysql/redis/elasticsearch/mongodb/sql), system-design/, distributed-system/, high-performance/, high-availability/, cs-basics/, ai/, ai-coding/, tools/, interview-preparation/, etc. docs/snippets/ holds @-prefixed markdown fragments pulled in via the theme's include feature (@foo → docs/snippets/foo).

docs/home.md is the landing page content; README.md at repo root is the GitHub-facing index.

my-submission/ — user's personal workspace

Not part of the published site. Contains completed/ and todo/ subfolders for the user's own article drafts. Git-tracked locally but irrelevant to the upstream VuePress build (lives outside docs/, so pagePatterns won't pick it up). Treat as scratch space — don't "clean up" without asking.

Editing content — practical notes

  • New pages: create the .md, then register it in the relevant sidebar/*.ts or it won't appear in navigation. Match the existing entry style (string link vs. { text, link } object).
  • Cross-page links use relative .md paths; VuePress rewrites them to .html at build.
  • Code blocks: language tag is not required (MD040 disabled), but adding one enables highlighting — prefer to tag.
  • Images: drop into docs/.vuepress/public/ and reference as /image.png, or co-locate per-section.
  • Mermaid diagrams are supported via the markdown-chart plugin ( ```mermaid fence).

Deploy / hosting

Static output in dist/ is served from javaguide.cn. scripts/indexnow-submit.mjs POSTs sitemap URLs to IndexNow after deploy when INDEXNOW_KEY/INDEXNOW_* env vars are set; without the key it no-ops safely. .github/workflows/test.yml runs CI on push (verify before assuming deploy steps).