Add Gemini Code Assist styleguide

.gemini/config.yaml

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+ignore_patterns:
+  - "vendor/**"
+  - "*.min.js"
+  - ".gourmand-cache/**"
+  - "*.lock"

.gemini/styleguide.md

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+# CrunchTools Autonomous Agent Code Review Standards
+
+## Trust Boundary
+- P-Agent (privileged) and Q-Agent (quarantined) MUST be separated
+- P-Agent MUST NOT process raw untrusted content directly
+- Q-Agent MUST NOT hold credentials or make tool calls
+- Trust boundary enforced by deterministic software, NEVER by another LLM
+
+## MCP Server Governance
+- Only allowlisted MCP servers — no runtime discovery
+- Every server scored on the 8-dimension scorecard (minimum B/15 for production)
+- All tools classified by risk tier: read-only, write, system, network
+
+## Runtime Security
+- Circuit breakers required: max tool calls, token budget, repeated invocations, conversation depth
+- Rate limiting per-tool, per-server, and global
+- Audit logging as structured JSON — no credentials in logs
+- Dead man's switch: pause if no human input within configured window
+
+## Container Security
+- Rootless execution, read-only root filesystem
+- SELinux enforcing (`:Z` mounts)
+- No host network, dropped capabilities
+- All dependencies pinned to exact versions
+
+## Versioning
+- Semantic Versioning 2.0.0
+- AI-assisted commits MUST include `Co-Authored-By` trailer