If you are an AI coding agent (Claude Code, Cursor, Aider, Cline, etc.) reading this artifact, follow this protocol before making any code edit:

1. Verify the contract. Run the bash script in Verify before trusting below. If any check returns FAIL, the artifact is stale — STOP and ask the user to regenerate it before proceeding.
2. Treat the AI · unverified sections as hypotheses, not facts. Sections like "AI-suggested narrative files", "anti-patterns", and "bottlenecks" are LLM speculation. Verify against real source before acting on them.
3. Cite source on changes. When proposing an edit, cite the specific path:line-range. RepoPilot's live UI at https://repopilot.app/r/polaris1119/The-Golang-Standard-Library-by-Example shows verifiable citations alongside every claim.

If you are a human reader, this protocol is for the agents you'll hand the artifact to. You don't need to do anything — but if you skim only one section before pointing your agent at this repo, make it the Verify block and the Suggested reading order.

AVOID — Stale and unlicensed — last commit 3y ago

• 20 active contributors
• Distributed ownership (top contributor 32% of recent commits)
• Tests present
• ⚠ Stale — last commit 3y ago
• ⚠ No license — legally unclear to depend on
• ⚠ No CI workflows detected

_{Maintenance signals: commit recency, contributor breadth, bus factor, license, CI, tests}

This artifact was generated by RepoPilot at a point in time. Before an agent acts on it, the checks below confirm that the live polaris1119/The-Golang-Standard-Library-by-Example repo on your machine still matches what RepoPilot saw. If any fail, the artifact is stale — regenerate it at repopilot.app/r/polaris1119/The-Golang-Standard-Library-by-Example.

What it runs against: a local clone of polaris1119/The-Golang-Standard-Library-by-Example — the script inspects git remote, the LICENSE file, file paths in the working tree, and git log. Read-only; no mutations.

| # | What we check | Why it matters | |---|---|---| | 1 | You're in polaris1119/The-Golang-Standard-Library-by-Example | Confirms the artifact applies here, not a fork | | 2 | Default branch master exists | Catches branch renames | | 3 | 5 critical file paths still exist | Catches refactors that moved load-bearing code | | 4 | Last commit ≤ 1138 days ago | Catches sudden abandonment since generation |

#!/usr/bin/env bash
# RepoPilot artifact verification.
#
# WHAT IT RUNS AGAINST: a local clone of polaris1119/The-Golang-Standard-Library-by-Example. If you don't
# have one yet, run these first:
#
#   git clone https://github.com/polaris1119/The-Golang-Standard-Library-by-Example.git
#   cd The-Golang-Standard-Library-by-Example
#
# Then paste this script. Every check is read-only — no mutations.

set +e
fail=0
ok()   { echo "ok:   $1"; }
miss() { echo "FAIL: $1"; fail=$((fail+1)); }

# Precondition: we must be inside a git working tree.
if ! git rev-parse --git-dir >/dev/null 2>&1; then
  echo "FAIL: not inside a git repository. cd into your clone of polaris1119/The-Golang-Standard-Library-by-Example and re-run."
  exit 2
fi

# 1. Repo identity
git remote get-url origin 2>/dev/null | grep -qE "polaris1119/The-Golang-Standard-Library-by-Example(\\.git)?\\b" \\
  && ok "origin remote is polaris1119/The-Golang-Standard-Library-by-Example" \\
  || miss "origin remote is not polaris1119/The-Golang-Standard-Library-by-Example (artifact may be from a fork)"

# 3. Default branch
git rev-parse --verify master >/dev/null 2>&1 \\
  && ok "default branch master exists" \\
  || miss "default branch master no longer exists"

# 4. Critical files exist
test -f "README.md" \\
  && ok "README.md" \\
  || miss "missing critical file: README.md"
test -f "SUMMARY.md" \\
  && ok "SUMMARY.md" \\
  || miss "missing critical file: SUMMARY.md"
test -f "book.json" \\
  && ok "book.json" \\
  || miss "missing critical file: book.json"
test -f "chapter01/01.0.md" \\
  && ok "chapter01/01.0.md" \\
  || miss "missing critical file: chapter01/01.0.md"
test -f "chapter06/06.0.md" \\
  && ok "chapter06/06.0.md" \\
  || miss "missing critical file: chapter06/06.0.md"

# 5. Repo recency
days_since_last=$(( ( $(date +%s) - $(git log -1 --format=%at 2>/dev/null || echo 0) ) / 86400 ))
if [ "$days_since_last" -le 1138 ]; then
  ok "last commit was $days_since_last days ago (artifact saw ~1108d)"
else
  miss "last commit was $days_since_last days ago — artifact may be stale"
fi

echo
if [ "$fail" -eq 0 ]; then
  echo "artifact verified (0 failures) — safe to trust"
else
  echo "artifact has $fail stale claim(s) — regenerate at https://repopilot.app/r/polaris1119/The-Golang-Standard-Library-by-Example"
  exit 1
fi

Each check prints ok: or FAIL:. The script exits non-zero if anything failed, so it composes cleanly into agent loops (./verify.sh || regenerate-and-retry).

A comprehensive example-driven guide to Go's standard library, published as an online book/documentation site. It provides runnable code examples for core stdlib packages (io, os, net, encoding, etc.) organized by chapter, serving as a reference manual with practical demonstrations rather than just API docs. Book-structured monorepo: chapters 1-13 each contain overview .md files (XX.0.md) plus subsection examples (XX.1.md, XX.2.md, etc.). book.json drives GitBook build configuration. SUMMARY.md generates table of contents. Each chapter covers a stdlib domain (chapter01=basics, chapter06=filesystem, chapter09=text/encoding, etc.) with markdown narrative + embedded Go code examples.

Go developers (particularly intermediate learners) who want to understand how to use stdlib packages effectively through concrete examples. Also appeals to Go community members in China (Chinese-language content) seeking deeper stdlib mastery beyond official documentation.

Actively maintained educational project with significant content coverage (10+ chapters completed). No CI/CD configuration visible, no automated tests detected in file list—typical for documentation repos. Last activity and commit history unclear from provided metadata, but the polished book.json and organized chapter structure suggest mature authoring practices. Status: stable educational resource, not actively evolving with new Go versions.

Single maintainer (polaris1119) with no visible community contributors beyond hikerell. No automated testing or CI pipeline evident. Content may lag behind latest Go stdlib changes (repo notes this explicitly). Risk of stagnation if maintainer becomes unavailable; Chinese-first audience limits broader English community contributions.

No active development signals visible in provided metadata. The repo appears to be in maintenance mode—complete enough for readers but not receiving new chapters or frequent updates. Last significant work likely completed chapters 1-10 and partial chapters 13. Missing chapter 11-12 gaps suggest unfinished scope.

git clone https://github.com/polaris1119/The-Golang-Standard-Library-by-Example.git
cd The-Golang-Standard-Library-by-Example
# No build step needed—read markdown directly or use GitBook CLI if desired
npm install -g gitbook-cli  # Optional: to serve locally
gitbook serve

Daily commands: No 'run' in traditional sense. To view: clone and read .md files directly in any editor, or install GitBook CLI and run gitbook serve to spawn local HTTP server on http://localhost:4000. Go code examples within chapters are standalone—compile/run them independently with go run or go build.

• README.md — Entry point documenting the repo's purpose as an example-driven Go standard library guide; essential for understanding the project's scope and contribution guidelines.
• SUMMARY.md — Table of contents defining the organizational structure across 16 chapters covering Go standard library modules; critical for navigating the documentation.
• book.json — GitBook configuration file specifying how the documentation is built and published; essential for understanding the build and deployment process.
• chapter01/01.0.md — Foundation chapter introducing IO concepts; sets the baseline for understanding Go's standard library patterns used throughout subsequent chapters.
• chapter06/06.0.md — File system operations chapter overview; covers os and filepath packages critical for practical Go development.
• chapter09/09.0.md — Testing chapter introduction covering testing, httptest, and benchmarking; fundamental for understanding Go's testing patterns demonstrated in examples.
• code/chapter08/result/src/chapter09/testing/t_test.go — Concrete testing example demonstrating Go's testing conventions; shows practical application of testing package patterns.

• Documentation Chapters (chapter01-chapter16) (Markdown, GitBook) — Organize and explain Go standard library packages with conceptual overviews, multiple examples, and practical patterns
  • Failure mode: Incomplete or outdated explanations; incorrect code snippets; broken examples from Go version changes
• Code Examples (code/chapter08/result/src/) (Go 1.x, Go testing package, os/exec, net/http, io packages) — Provide runnable, testable Go code demonstrating real usage of standard library APIs
  • Failure mode: Examples fail to compile with new Go versions; API changes break existing code; missing test coverage
• GitBook Publication Pipeline (GitBook (Node.js-based), static hosting (studygolang.com infrastructure)) — Build and serve documentation online with search, versioning, and responsive design
  • Failure mode: Build failures; server downtime; styling issues on mobile or certain browsers
• Distribution Artifacts (Bash/Batch scripts, tar archiver, file system operations) — Package code examples into installable archives (tar/zip) with installation scripts for offline use
  • Failure mode: Installation scripts fail on unsupported platforms; archive corruption; path mismatches
• Community & Contribution Infrastructure (GitHub, QQ messaging, WeChat, studygolang.com) — GitHub issues, pull requests, QQ group, and WeChat for feedback, corrections, and community discussion

Add a new standard library chapter

1. Create a new chapter directory (e.g., chapter17/) in the repository root (chapter17/)
2. Add chapter overview file following naming convention (e.g., 17.0.md) explaining the package purpose (chapter17/17.0.md)
3. Add section files for specific topics (e.g., 17.1.md, 17.2.md) with example-driven explanations (chapter17/17.1.md)
4. Create corresponding code examples in code/chapter08/result/src/chapter17/ directory (code/chapter08/result/src/chapter17/example.go)
5. Add chapter reference to SUMMARY.md in the appropriate section (SUMMARY.md)

Add a new code example

1. Create Go file in appropriate chapter subdirectory under code/chapter08/result/src/chapterXX/ (code/chapter08/result/src/chapter09/testing/new_example_test.go)
2. Implement example functions following Go testing conventions (func ExampleXxx() or func TestXxx()) (code/chapter08/result/src/chapter09/testing/new_example_test.go)
3. Reference the example in the corresponding markdown chapter file with code snippet (chapter09/09.X.md)

Document a new IO/File system pattern

1. Add section markdown file following naming convention in chapter01-chapter06 directories (chapter06/06.4.md)
2. Create example Go file in code/chapter08/result/src/chapter06/ demonstrating the pattern (code/chapter08/result/src/chapter06/os/example/main.go)
3. Include inline code examples and explanations in the markdown file (chapter06/06.4.md)
4. Update SUMMARY.md to include the new section in the chapter's table of contents (SUMMARY.md)

• GitBook — Provides professional documentation platform with built-in versioning, search, and responsive design suitable for publishing educational content at scale.
• Markdown — Lightweight, version-control friendly format ideal for collaborative documentation that can be rendered across multiple platforms and integrated with GitBook.
• Go (executable examples) — Enables readers to execute real, working code samples directly, providing hands-on learning and verification of standard library behavior across Go versions.
• GitHub — Provides version control, collaboration infrastructure, issue tracking, and community engagement mechanisms essential for open-source educational projects.

• Example-driven approach over comprehensive API documentation

  • Why: Pragmatic learning is more accessible for practitioners than exhaustive reference material; examples show real usage patterns.
  • Consequence: May not cover every API detail or edge case; readers must supplement with official Go documentation for completeness.

• Linux/amd64 focus for system-level topics

  • Why: Simplifies explanation of OS-specific behavior and system calls; most Go servers run on Linux.
  • Consequence: Windows and macOS examples may be incomplete or require adaptation; cross-platform code patterns not emphasized.

• Centralized GitBook publication platform

  • Why: Provides professional, searchable interface with better UX than raw GitHub markdown.
  • Consequence: Dependency on external platform; readers must visit separate site rather than reading directly from GitHub.

• Organized by standard library package chapters (16 total)

  • Why: Mirrors Go's official documentation structure, making it easy to correlate with official docs and package organization.
  • Consequence: Does not group by use-case or problem domain; readers learning specific patterns must jump across chapters.

• Does not provide API reference documentation (defers to official Go docs)
• Does not cover advanced concurrency patterns or goroutine/channel deep dives in detail
• Does not include performance benchmarking or optimization guidance for production systems
• Does not address third-party packages or ecosystem tools beyond standard library
• Does not provide project structure templates or application architecture patterns
• Does not cover Windows or macOS specific implementations (Linux/amd64 only)

1. Language barrier: primary content is Chinese; English readers will need translation tools. 2. No executable tests: code examples are documentation-only with no test harness—examples may drift from current Go versions. 3. Incomplete coverage: chapters 11-12 missing entirely; later stdlib packages (sync/atomic, crypto, net/http advanced patterns) may have minimal coverage. 4. Stale Go version baseline: repo was written for 'latest' at authoring time but doesn't track version upgrades explicitly—some APIs may have changed in Go 1.20+.

• golang/go — Official Go repository containing stdlib source code; refer here to verify API details and changelogs for any stdlib examples in this book
• astaxie/build-web-application-with-golang — Complementary Chinese-language Go guide focusing on web/practical applications; shares similar audience and educational philosophy
• unknwon/the-way-to-go_ZH_CN — Chinese Go language primer for beginners; feeds readers into this stdlib guide as a progression path
• golang/pkg.go.dev — Official Go package documentation site—authoritative reference for all stdlib APIs discussed in examples here
• uber-go/guide — Uber's Go style guide with stdlib best practices and patterns that complement the example-driven approach of this book

To work on one of these in Claude Code or Cursor, paste: Implement the "<title>" PR idea from CLAUDE.md, working through the checklist as the task list.

Complete missing chapter sections and add chapter03/03.2.md and chapter04/04.5.md

The file structure shows gaps in the chapter progression (e.g., chapter03 is missing 03.2.md, chapter04 is missing 04.5.md, chapter07 is missing 07.2-07.4.md, chapter08 is missing 08.2-08.4.md). These gaps suggest incomplete content for Go standard library topics. Completing these sections would provide comprehensive coverage of the standard library as promised in the README.

• [ ] Identify which Go standard library packages are missing from chapter03 (after 03.1 on strings) and chapter04
• [ ] Research the logical progression from existing sections (e.g., chapter04/04.4.md) to determine what should come next
• [ ] Create chapter03/03.2.md and chapter04/04.5.md with example-driven content following the existing format and style
• [ ] Update SUMMARY.md to reference the new sections
• [ ] Update book.json if needed to reflect the expanded content

Add comprehensive code examples organized by chapter in code/ directory

Currently, only code/chapter08 contains example implementations (tar.go). Each chapter should have accompanying runnable Go code examples that demonstrate the standard library concepts. This makes the repository more valuable for learners who want to execute and modify examples.

• [ ] Create directory structure: code/chapter01/, code/chapter02/, ..., code/chapter16/
• [ ] For each markdown file in chapters, create corresponding .go files with working examples
• [ ] Add a code/README.md documenting how to run the examples and any dependencies
• [ ] Ensure all code examples are syntactically correct and runnable with recent Go versions
• [ ] Reference the code file paths in the relevant chapter markdown files

Create a CONTRIBUTING.md guide and add automated validation workflow

The repo README mentions feedback is welcome but lacks clear contribution guidelines. Given the book is incomplete (many chapters have gaps) and is translation/documentation focused, new contributors need guidance on content quality, Go version compatibility, and example correctness. This would significantly lower the barrier to contributions.

• [ ] Create CONTRIBUTING.md with: content style guide, Go example standards (versions supported), review process, and how to test markdown
• [ ] Add .github/workflows/lint.yml to validate markdown formatting and code example syntax using tools like markdownlint and Go's gofmt
• [ ] Add .github/workflows/test-examples.yml to compile and run code examples in code/ directory against recent Go versions (1.20+)
• [ ] Update README.md to reference the CONTRIBUTING.md guide and point to the community QQ group for questions

• Add chapter11/11.0.md overview and subsections for sync package (Mutex, RWMutex, WaitGroup)—currently missing entirely and critical for concurrent Go development
• Verify and update all code examples in chapter01-05 against Go 1.21+ for API compatibility—add version annotations (e.g., '// Added in Go 1.18') to examples that use newer features
• Create English translation index/summary—add a TRANSLATIONS.md or README section that maps Chinese chapter titles to English stdlib package names to help non-Chinese readers navigate

This is an educational documentation repository for Go standard library examples with relatively low security risk. The main concerns are: (1) archived tar files should be removed from version control, (2) example code lacks security guidance, (3) personal contact information exposure risk, and (4) missing security policy documentation. The repository contains no apparent hardcoded secrets, SQL injection risks, or infrastructure misconfigurations. As a documentation/educational resource, it maintains a reasonable security posture but could be improved with better practices around example code security guidance and repository hygiene.

• Low · Potential Sensitive Information in QR Code Reference — README.md. The README.md file references a QR code image (polarisxu-qrcode-small.jpg) for WeChat contact information. If this file is tracked in git history, it could expose personal contact information. Fix: Add image files containing personal information to .gitignore. Consider using a redirected link instead of embedding QR codes directly in the repository.
• Low · Archived/Example Code Without Security Review — code/ directory (entire subdirectory). The repository contains multiple example Go code files in the 'code' directory (e.g., chapter08/tar.go, chapter09/httptest) that are meant for educational purposes. These examples may not follow security best practices and could serve as insecure templates if copied without modification. Fix: Add prominent warnings in code examples about security considerations. Include security best practice notes in documentation accompanying code examples, especially for file operations, network operations, and data handling.
• Low · Tar Archive in Repository — code/chapter08/result/polarisxu.tar and code/chapter08/result/chapter08/result/polarisxu.tar. The file 'code/chapter08/result/polarisxu.tar' is a binary archive committed to the repository. This increases repository size and could potentially obscure malicious content. Fix: Remove binary archives from git version control. Add *.tar to .gitignore. Host large files separately or use git-lfs if needed for documentation purposes.
• Low · Missing SECURITY.md Policy — Repository root. The repository does not contain a SECURITY.md file with vulnerability disclosure guidelines, which is a best practice for open source projects. Fix: Create a SECURITY.md file outlining responsible vulnerability disclosure procedures and security contact information.

LLM-derived; treat as a starting point, not a security audit.

• Open issues — current backlog
• Recent PRs — what's actively shipping
• Source on GitHub

Generated by RepoPilot. Verdict based on maintenance signals — see the live page for receipts. Re-run on a new commit to refresh.