I built a black box recorder for AI systems – CEL v0.2 Pro

The problem

Modern AI agents make decisions, call tools, and run complex pipelines — but their logs are mutable JSON files. You can't prove what actually happened.

What is CEL?

CEL (Colchis Execution Log) is a cryptographically verifiable execution log for AI systems.

Every event is recorded as a SHA-256 hash-chained binary frame. Any tampering breaks the chain immediately.

Think Git — but for AI execution history.

New in v0.2: Execution Proof

bash
python3 cli.py proof mylog.log
python3 cli.py verify-proof mylog.log mylog.log.proof.json
# → ✅ Proof VALID
Share one file to prove your AI ran exactly this way — independently verifiable by third parties.
Features
✅ SHA-256 hash chain — tamper-evident
✅ Execution Proof generator
✅ CLI tool (init, append, verify, dump, export, proof)
✅ Web interface (Flask)
✅ Export to CSV and PDF
✅ Compliance-ready — EU AI Act, GDPR, HIPAA
✅ Zero cloud dependency — works fully offline
Links
GitHub: https://github.com/GhurtSky-GR13/colchis-log
CEL Pro ($99): https://ko-fi.com/s/50fccfeecd