agentassert-typec-claude-code

Claude Code hook adapter — contract enforcement directly in Claude Code.

Install

pip install agentassert-typec-claude-code
agentassert-claude-code install --contract partner-mode.yaml
export AGENTASSERT_CONTRACT=$(pwd)/partner-mode.yaml

What Happens

1. A 00-agentassert-typec.py hook is placed in ~/.claude-hooks/
2. Every tool call in Claude Code is intercepted
3. Contract is evaluated in-process (sub-10ms)
4. On DENY: block with reason; on ALLOW: forward

Available Contracts

# Minimal: just block destructive tools
agentassert-claude-code install --contract $(pip show agentassert-typec-claude-code | grep Location | cut -d' ' -f2)/contracts/templates/safety-minimal.yaml

# Partner mode: challenge-first, cost-before-paid, drift detection
agentassert-claude-code install --contract $(pip show agentassert-typec-claude-code | grep Location | cut -d' ' -f2)/contracts/templates/partner-mode.yaml

# Full governance: all 7 operators
agentassert-claude-code install --contract $(pip show agentassert-typec-claude-code | grep Location | cut -d' ' -f2)/contracts/templates/full-governance.yaml

The Partner Mode Story

Varun's ~/.claude/CLAUDE.md + ~/.claude/rules/*.md contained ~14,000 tokens of process rules. After migrating to partner-mode.yaml:

• 47.8% token reduction per turn (49,636 → ~25,920 bytes)
• process rules: 31,322 bytes → 1,203 bytes (96% compression of rules)
• Replaced: challenge-first, cost-before-paid-API, tool blocklist, destructive-command firewall, context budget
• Preserved: style/voice rules (cannot formalize), capability routing, reference docs

See case_study/measurements.md for the full analysis.

Status

agentassert-claude-code status

Uninstall

agentassert-claude-code uninstall

License

MIT