Skilldeck centralizes AI agent skill files across development tools, automatically syncing configurations for Claude, Cursor, Windsurf, and others while preventing configuration drift.

Solves fragmentation problem where skill files scatter across projects in different formats (.claude/skills/, .cursor/rules/*.mdc, AGENTS.md, .windsurfrules)

Maintains a single local library that auto-deploys to 10+ tool profiles including Claude Code, Cursor, Copilot, Windsurf, and Codex in correct format

Includes drift detection to alert users when deployed skills diverge from library versions and bidirectional sync to pull improvements back

Built entirely by Claude Code using harness engineering methodology with JSON ground truth files, Playwright E2E tests, and regression gates across 31 features