Nano Claude Code v3

Description

~5,000-line multi-agent Python clean-room rewrite. Third generation after v1.0 (1,300 lines, Apr 1) and v2.0 (3,400 lines, Apr 2). Adds memory + skill packages, argument substitution, fork/inline execution, AI memory search (Milvus dense-vector + BM25 hybrid), git worktree isolation, and agent type definitions. First clean-room rewrite to implement worktree isolation pattern.

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Sources

src-20260419-cfed81b8d6a5