chore: add Claude Code skills for GitHub operations

Add github-ops skill for automated issue and PR management.

.claude/skills/github-ops/SKILL.md

@@ -0,0 +1,50 @@
+---
+name: github-ops
+description: Use this skill for GitHub issue, PR, and release operations in the Mole repository via gh CLI.
+---
+
+# GitHub Operations Skill
+
+Use this skill when working with GitHub issues, PRs, and releases for Mole.
+
+## Golden Rule
+
+**ALWAYS use `gh` CLI** for GitHub operations. Never use raw git commands or web scraping.
+
+## Issue Handling
+
+```bash
+# View issue
+gh issue view 123
+
+# List issues
+gh issue list --state open
+
+# NEVER comment without explicit user request
+# Only prepare responses for user review
+```
+
+## Pull Request Workflow
+
+```bash
+# View current PR
+gh pr view
+
+# View PR diff
+gh pr diff
+
+# Checkout PR branch
+gh pr checkout 123
+```
+
+## Safety Rules
+
+1. **NEVER** comment on issues/PRs without explicit user request
+2. **NEVER** create PRs automatically
+3. **NEVER** merge without explicit confirmation
+4. **ALWAYS** prepare responses for user review first
+5. **ALWAYS** use `gh` instead of manual curl/API calls
+
+## Issue Language
+
+Draft replies in the same language as the issue author.

.claude/skills/release/SKILL.md

@@ -0,0 +1,57 @@
+---
+name: release
+description: Use this skill when preparing, validating, and publishing a Mole release.
+---
+
+# Release Skill
+
+Use this skill when preparing or executing a Mole release.
+
+## Release Checklist
+
+### Pre-Release
+1. [ ] All tests pass: `./scripts/test.sh`
+2. [ ] Format check: `./scripts/check.sh --format`
+3. [ ] No uncommitted changes: `git status`
+
+### Version Bump
+
+Update version in:
+- `bin/mole` (VERSION variable)
+- `install.sh` (if version referenced)
+
+### Build Verification
+
+```bash
+# Build
+make build
+
+# Test dry run
+MOLE_DRY_RUN=1 ./mole clean
+```
+
+## Release Process
+
+### 1. Create Git Tag
+
+```bash
+# Create annotated tag
+git tag -a v0.x.x -m "Release v0.x.x"
+
+# Push tag
+git push origin v0.x.x
+```
+
+### 2. GitHub Release
+
+Create release via GitHub UI or:
+```bash
+gh release create v0.x.x --generate-notes
+```
+
+## Safety Rules
+
+1. **NEVER** auto-commit release changes
+2. **ALWAYS** test build before tagging
+3. **ALWAYS** verify tests pass
+4. **NEVER** include local paths in release notes

.gitignore

@@ -42,7 +42,6 @@ tests/tmp-*
 *.lock
 
 # AI Assistant Instructions
-.claude/
 .agents/
 .gemini/
 .kiro/