[zuiho-kai]

What changed

• add a cross-repository simplification audit adapted from DeepSeek Harness
• require production/non-production/ambiguous consumer evidence before calling code dead
• distinguish trusted typed handoffs from external trust boundaries before flagging defensive code
• require lifecycle ownership evidence before collapsing async state
• expose the guide as a mandatory Direct review input without consuming owner-route slots

Why

Dead-code and over-defensive-programming findings need repeatable evidence, but the full procedure belongs in the shared knowledge base rather than every review prompt.

Validation

• python knowledge/tools/check_knowledge_tree.py
• python knowledge/tools/check_wiki_lint.py
• PYTHONPATH=src python -m pytest -q test/test_thin_mcp_server.py (40 passed)
• Ruff passed for changed Python files
• git diff --check

Full local collection was not used as evidence because the default Python is 3.9 while the project requires Python 3.11+.