occ-openai-agents

OCC cryptographic proof signing for the OpenAI Agents SDK.

Every tool call produces an Ed25519-signed proof entry in proof.jsonl, creating a tamper-evident audit log of agent actions.

Install

pip install occ-openai-agents

Quick Start

Decorator

from agents import Agent, function_tool, Runner
from occ_openai_agents import occ_tool

@occ_tool
@function_tool
def search(query: str) -> str:
    """Search the web."""
    return f"Results for: {query}"

agent = Agent(name="my-agent", tools=[search])
result = Runner.run_sync(agent, "Search for OCC proofs")

Wrap All Tools

from occ_openai_agents import wrap_agent_tools

agent = Agent(
    name="my-agent",
    tools=wrap_agent_tools([search, calculator]),
)

Hook Class

from occ_openai_agents import OccToolHook, OCCSigner

signer = OCCSigner(state_dir=".occ", proof_file="audit.jsonl")
hook = OccToolHook(signer=signer)

agent = Agent(
    name="my-agent",
    tools=hook.wrap_tools([search, calculator]),
)

Proof Format

Each line in proof.jsonl is a JSON object:

{
  "version": "occ/proof/1",
  "timestamp": "2026-03-20T12:00:00.000Z",
  "signer": "<base64url-ed25519-public-key>",
  "payload": {
    "type": "tool-call",
    "tool": "search",
    "inputHash": "<sha256-hex>",
    "outputHash": "<sha256-hex>"
  },
  "signature": "<base64url-ed25519-signature>",
  "prev": "<sha256-hex-of-previous-proof>"
}

Proofs are chained: each proof's prev field contains the SHA-256 hash of the previous proof's canonical JSON.

Configuration

• State directory: Keypair stored in .occ/signer-state.json (defaults to CWD)
• Proof file: Defaults to proof.jsonl in CWD
• Both configurable via OCCSigner(state_dir=..., proof_file=...)

License

Apache-2.0