---

name: github-url-intercept version: 2.1.0 description: "BLOCKING INTERCEPT: When ANY github.com URL appears in user input, STOP and use this skill. Never fetch GitHub HTML pages directly - they are 5-10MB and will exhaust your context window. This skill routes URLs to efficient API calls (1-50KB). Triggers on: pull/, issues/, blob/, tree/, commit/, compare/, discussions/." license: MIT model: claude-opus-4-5 metadata: domains:

• github
• url-parsing
• context-optimization type: interceptor complexity: low priority: critical related_skills:
• github

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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.

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Quick Reference (Copy-Paste Commands)

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

Copy# PR URL → Use this
pwsh .claude/skills/github/scripts/pr/Get-PRContext.ps1 -PullRequest {n} -Owner {owner} -Repo {repo}

# Issue URL → Use this
pwsh .claude/skills/github/scripts/issue/Get-IssueContext.ps1 -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}

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

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Triggers

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URL Patterns (Detailed Reference)

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Decision Flow

CopyGitHub URL detected in user input
│
├─ Has fragment (#pullrequestreview-, #discussion_r, #issuecomment-)?
│     Yes → Extract ID, use gh api for specific comment/review
│
├─ Is /pull/{n}?
│     Yes → Get-PRContext.ps1 -PullRequest {n} -Owner {o} -Repo {r}
│           (or Get-PRReviewComments.ps1 / Get-PRReviewThreads.ps1 for comments)
│
├─ Is /issues/{n}?
│     Yes → Get-IssueContext.ps1 -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}

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Process

Phase 1: URL Detection and Parsing

Phase 2: Route Selection

Phase 3: Execution

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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:

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URL Parsing Pattern

Extract owner, repo, and resource from GitHub URLs:

Copyhttps://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}

Fragment extraction (when present):

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

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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.

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Examples

Bare URL Pasted (Most Common!)

CopyInput: "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: pwsh .claude/skills/github/scripts/pr/Get-PRChecks.ps1 -PullRequest 735 -Owner rjmurillo -Repo ai-agents

URL with Question After It

CopyInput: "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

CopyInput: "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

CopyInput: "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

CopyInput: "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

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

Action:
  pwsh ".claude/skills/github/scripts/pr/Get-PRContext.ps1" -PullRequest "123" -Owner "owner" -Repo "repo"

File URL → API

CopyInput: "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"

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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.

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Related Skills

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Verification Checklist

Before processing any GitHub URL:

• Extracted owner/repo from URL path
• Identified URL type (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 (for scripts)