Add Claude Skills Pro — 15 engineering-workflow skills (5 free, MIT)

[Rogue AI (Hahaknight)]

What

Adds Claude Skills Pro to Development & Code Tools.

A pack of 15 workflow skills distilled from staff-level engineering practice — each skill encodes trigger conditions, a step-by-step procedure, and hard anti-patterns:

• pr-reviewer — 7-dimension review (correctness/security/perf/contracts/errors/tests/maintainability); findings cite file:line, ranked blocker/should-fix/nit
• test-forge — tests that kill mutants: boundaries, failure paths, property tests, mutation self-check
• bug-hunter — reproduce → bisect → one falsifiable hypothesis → minimal fix → regression test
• db-migration-safe — expand→migrate→contract, lock-risk assessment for large tables
• ai-code-reviewer — the 8 characteristic failure modes of AI-generated code (hallucinated APIs, behavior drift, over-engineering)
• …plus feature-spec, commit-craft, security-audit, refactor-surgeon, perf-profiler, codebase-onboarding, api-designer, changelog-release, dep-guardian, legacy-explainer

Checklist against your requirements

• Real use case: distilled from day-to-day engineering workflows (code review rituals, on-call debugging, migration playbooks) ✅
• Well-documented: every SKILL.md includes When/Workflow/Output/Anti-patterns ✅
• Tested on Claude Code ✅
• Portable: pure markdown, no dependencies, user-level or project-level install ✅
• 7 of the 15 are free/open-source (MIT); repo includes bilingual README + installers

Placed alphabetically in the section. Happy to adjust format/description.