popup-studio-ai/bkit-claude-code

**Technical Summary:** Implements Context Engineering—systematic context token curation for Claude Code—through a 6-layer hook system (18 hook events across global, skill, agent, semantic, script, and persistent state layers) that injects domain knowledge (37 skills), behavioral rules (32 role-based agents with model selection), and state management (~620 functions) at inference time. The PDCA state machine (20 transitions) orchestrates CTO-led agent teams with quality gates, audit logging, and checkpoint/rollback across plan-do-check-act workflows, while MCP servers (bkit-pdca, bkit-analysis) provide structured automation from L0-L4 controllability levels. Persistent state isolation via `${CLAUDE_PLUGIN_DATA}` and `.bkit/` directory prevents cross-project context leakage and enables Studio IPC coordination.

384 stars.