Github Url Intercept

GitHub URL Intercept

CRITICAL: This skill activates AUTOMATICALLY when you see ANY github.com URL. Do NOT use web_fetch, curl, or any browser-based fetch on GitHub URLs. Doing so wastes 1-2.5 MILLION tokens on HTML that provides no useful data.

MANDATORY BEHAVIOR: Parse the URL → Route to API → Return structured JSON.

Quick Reference (Copy-Paste Commands)

When you see a GitHub URL, use these commands immediately:

SCRIPTS_DIR="${CLAUDE_PLUGIN_ROOT:-.claude}/skills/github/scripts"

# PR URL → Use this
python3 "$SCRIPTS_DIR/pr/get_pr_context.py" --pull-request {n} --owner {owner} --repo {repo}

# Issue URL → Use this
python3 "$SCRIPTS_DIR/issue/get_issue_context.py" --issue {n} --owner {owner} --repo {repo}

# File/blob URL → Use this
gh api repos/{owner}/{repo}/contents/{path}?ref={ref}

# Commit URL → Use this
gh api repos/{owner}/{repo}/commits/{sha}

# Gist URL → Use this
gh api gists/{id}

# Comment fragment (#discussion_r{id}) → Use this
gh api repos/{owner}/{repo}/pulls/comments/{id}

Triggers

When to Use

Use this skill when:

• Any github.com URL appears in user input (automatic activation)
• User pastes a PR, issue, commit, file, or actions URL
• User asks to "analyze" or "review" a GitHub link

Use github instead when:

• Performing mutations (creating PRs, posting comments, adding labels)
• Operating on the current repository without a URL

URL Patterns (Detailed Reference)

Decision Flow

GitHub URL detected in user input
│
├─ Is gist.github.com/{owner}/{id}?
│     Yes → gh api gists/{id}
│
├─ Has fragment (#pullrequestreview-, #discussion_r, #issuecomment-)?
│     Yes → Extract ID, use gh api for specific comment/review
│
├─ Is /pull/{n}?
│     Yes → get_pr_context.py --pull-request {n} --owner {o} --repo {r}
│           (or get_pr_review_comments.py / get_pr_review_threads.py for comments)
│
├─ Is /issues/{n}?
│     Yes → get_issue_context.py --issue {n} --owner {o} --repo {r}
│
├─ Is /blob/{ref}/{path} or /tree/{ref}/{path}?
│     Yes → gh api repos/{o}/{r}/contents/{path}?ref={ref}
│
├─ Is /commit/{sha}?
│     Yes → gh api repos/{o}/{r}/commits/{sha}
│
└─ Is /compare/{base}...{head}?
      Yes → gh api repos/{o}/{r}/compare/{base}...{head}

Process

Phase 1: URL Detection and Parsing

Phase 2: Route Selection

Phase 3: Execution

URL Routing Table

Primary: Use GitHub Skill Scripts

Script location: .claude/skills/github/scripts/

Fallback: Raw gh Commands

Use only when no script exists for the operation:

URL Parsing Pattern

Extract owner, repo, and resource from GitHub URLs:

https://github.com/{owner}/{repo}/pull/{number}
https://github.com/{owner}/{repo}/issues/{number}
https://github.com/{owner}/{repo}/blob/{ref}/{path}
https://github.com/{owner}/{repo}/tree/{ref}/{path}
https://github.com/{owner}/{repo}/commit/{sha}
https://github.com/{owner}/{repo}/compare/{base}...{head}
https://gist.github.com/{owner}/{id}
https://gist.github.com/{id}
https://gist.github.com/{owner}/{id}.js
https://gist.githubusercontent.com/{owner}/{id}/raw/{revision}/{path}

Fragment extraction (when present):

• #pullrequestreview-{id} → Review ID
• #discussion_r{id} → Discussion comment ID
• #issuecomment-{id} → Issue comment ID

Why This Matters (CRITICAL)

Fetching GitHub HTML is catastrophic for your context window:

Impact: 100-1000x reduction in token consumption.

If you fetch GitHub HTML directly, you will:

1. Consume your entire context window on ONE page
2. Get no useful structured data (just HTML soup)
3. Be unable to process subsequent user requests
4. Need to start a new conversation

ALWAYS use this skill when you see a GitHub URL.

Examples

Bare URL Pasted (Most Common!)

Input: "https://github.com/rjmurillo/ai-agents/pull/735/checks?check_run_id=59355308734"

Action:
  1. Parse: owner=rjmurillo, repo=ai-agents, pr=735, type=checks
  2. Route: python3 "$SCRIPTS_DIR/pr/get_pr_checks.py" --pull-request 735 --owner rjmurillo --repo ai-agents

Gist URL

Input: "https://gist.github.com/owner/0123456789abcdef0123"

Action:
  1. Parse: owner=owner, gist=0123456789abcdef0123, type=gist
  2. Route: gh api "gists/0123456789abcdef0123"

Ownerless URLs, query strings, file fragments, .js embed URLs, raw-content URLs, revision SHAs, and /revisions or /raw suffixes route through the gist API. Pinned revisions stay pinned. Raw file URLs return only the requested file.

URL with Question After It

Input: "https://github.com/owner/repo/pull/715/changes#r2656144507 are the graph refactoring items part of Issue 722?"

Action:
  1. Extract fragment: r2656144507 (review comment ID)
  2. Call: gh api "repos/owner/repo/pulls/comments/2656144507"
  3. Answer user's question using the comment content

Multiple URLs in One Prompt

Input: "https://github.com/owner/repo/pull/715#discussion_r123 https://github.com/owner/repo/pull/715#discussion_r456"

Action:
  1. Parse each URL
  2. Batch: gh api "repos/owner/repo/pulls/comments/123"
  3. Batch: gh api "repos/owner/repo/pulls/comments/456"

Research/Analyze Pattern

Input: "analyze https://github.com/modu-ai/moai-adk for insights"

Action:
  1. Use deepwiki MCP or gh api to get repo info
  2. Call: gh api "repos/modu-ai/moai-adk" (NOT web_fetch!)

CI/Actions Run URL

Input: "https://github.com/owner/repo/actions/runs/20675405338/job/59362398542?pr=740"

Action:
  1. Extract: run_id=20675405338, job_id=59362398542
  2. Call: gh api "repos/owner/repo/actions/jobs/59362398542"

PR URL → Script

Input: "Review this: https://github.com/owner/repo/pull/123"

Action:
  python3 "$SCRIPTS_DIR/pr/get_pr_context.py" --pull-request 123 --owner owner --repo repo

File URL → API

Input: "would a hook like https://github.com/ruvnet/claude-flow/blob/main/.claude/settings.json help?"

Action:
  gh api "repos/ruvnet/claude-flow/contents/.claude/settings.json?ref=main"

Anti-Patterns (NEVER DO THESE)

RED FLAG PHRASES - If you're about to do any of these, STOP:

• "Let me fetch that page..."
• "I'll retrieve the content from that URL..."
• "Accessing the GitHub page..."

These indicate you're about to waste millions of tokens. Use this skill instead.

Scripts

test_url_routing.py

Routes GitHub URLs to appropriate API access methods with CWE-78 command injection protection.

python3 "${COPILOT_PLUGIN_ROOT:-${CLAUDE_PLUGIN_ROOT:-.claude}}/skills/github-url-intercept/scripts/test_url_routing.py" --url <github-url>

Related Skills

Verification

After routing a GitHub URL, run the bundled validator and require exit 0:

python3 "${COPILOT_PLUGIN_ROOT:-${CLAUDE_PLUGIN_ROOT:-.claude}}/skills/github-url-intercept/scripts/test_url_routing.py" --url "$GITHUB_URL"
echo "exit=$?"   # must be 0; exit 1 means invalid URL or no routing available

• test_url_routing.py exited 0 (non-zero = invalid URL or unroutable type; routing is not valid)
• Extracted owner/repo or gist owner/id from URL path
• Identified URL type (gist, PR, issue, blob, commit, compare)
• Extracted fragment ID if present (#discussion_r, #issuecomment-, #pullrequestreview-)
• Selected appropriate github skill script (primary) or gh command (fallback)
• Did NOT use web_fetch, curl, or browser-based fetch on the URL
• Received structured JSON response with success: true