docs: README bio-framing + PHILOSOPHY + security hardening
- README rewritten with bioinspired framing: KeiSeiKit as living
neural structure of Kei (DNA / REM / Deep Sleep / creator lineage).
All counts verified against source: 36 crates, 12 agents, 43 skills,
12 hooks, 82 blocks.
- docs/PHILOSOPHY.md new 11.4 KB deep-dive on the substrate
thesis, the 4-layer architecture, and roadmap (federation / signing
/ marketplace / visualization as Wave 14+).
- .gitignore hardened: .env, secrets/, *.pem, *.key, id_rsa*,
id_ed25519*, .claude/secrets/ — public-repo safe. .env.example
and .env.template re-included.
- docs/SECURITY.md: secret hygiene section with revoke-and-rotate
protocol + canonical ~/.claude/secrets/.env reference (RULE 0.8).
Verified clean: defensive grep for sk-ant-, ghp_, private keys,
token/key assignments = zero hits across tree.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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