EU AI Act compliance audit log (Articles 12/13/17). Immutable append-only JSON Lines format, SIEM-friendly, write-only. Usually paired with molecule-compliance.

What it logs

Records for every AI system operation:

Timestamp, actor, action, outcome
Input/output data categories
Human oversight actions
System failure events

Format: JSON Lines (.jsonl) — one record per line, no envelope.

How it works

builtin_tools/audit.py provides the log writer. This plugin is the opt-in policy layer that activates it per workspace.

Install

In org template (org.yaml)

plugins:
  - molecule-audit

Recommended sibling: molecule-compliance for complete coverage.

From URL (community install)

github://Molecule-AI/molecule-ai-plugin-molecule-audit

Configuration

audit:
  log_path: .claude/ai-act-audit.jsonl
  retention_days: 365
  siem_endpoint: https://your-siem.example.com/ingest

Runtimes

langgraph — primary
claude_code — supported
deepagents — supported

Skills

ai-act-audit-log — agent guidance on AI Act article requirements

Architecture

skills/
  ai-act-audit-log/
    SKILL.md   # Agent-side guidance (when/how to call log_event)
adapters/
  claude_code.py  # Installs skill via AgentskillsAdaptor; no scripts/ needed —
                  # builtin_tools.audit does not expose @tool-decorated functions;
                  # the audit layer is passive (other tools call log_event)

Known issues

See known-issues.md.

README.md

molecule-audit