feat(skills): add skill-creator skill for creating, evaluating, and improving skills

[JeremyDev87]

Summary

• Add new skill-creator skill with 4 modes: Create, Eval, Improve, Benchmark
• Provides systematic workflow for building, testing, and optimizing codingbuddy skills
• Includes multi-tool compatibility guidelines (Claude Code, Cursor, Codex, Q, Kiro)
• Follows codingbuddy patterns: Core principle, Iron Law, When to Use/NOT to Use, Red Flags
• 461 lines (under 500-line limit), all original content (no Anthropic copy)
• Updated skills/README.md catalog with new entry

Test plan

• Frontmatter validates (name pattern, description length, all fields present)
• 461 lines, under 500-line limit
• No overlap with existing skills (rule-authoring, agent-design, prompt-engineering)
• Multi-tool compatible (no tool-specific syntax in core workflow)
• markdownlint passes (0 errors across 66 files)
• All CI checks pass (lint, format, typecheck, test, circular, build, ajv, markdownlint)

Closes #739

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Project	Deployment	Actions	Updated (UTC)
codingbuddy-landing	Ready	Preview, Comment	Mar 21, 2026 1:34pm