agent-manifest

Cryptographically anchor all 10 artifacts defining an AI agent at deployment.

The Agent Manifest SDK implements the Agent Manifest Specification v0.1 - a hardware-attestable document that binds every artifact defining an agent's behavior (system prompt, policy bundle, tool schemas, model identity, RAG corpus, memory state, audit chain, delegation chain, supply chain, and human approvals) into a single tamper-evident identity primitive.

pip install agent-manifest

Why

A signed JWT proves who called an API. An Agent Manifest proves who the agent was, what it was allowed to do, how it was built, what it decided, who approved it, and whether any of that changed between approval and execution.

from agent_manifest import (
    Manifest, ArtifactBindings,
    SystemPromptBinding, PolicyBundleBinding, ModelIdentityBinding,
    CryptoProfile, DeploymentType, EnforcementMode, PolicyLanguage,
    generate_ed25519, Ed25519Signer,
)
from agent_manifest._types import HashValue, ManifestId
from datetime import datetime, timedelta, timezone

now = datetime.now(timezone.utc)

manifest = Manifest(
    manifest_id=ManifestId("018f4a3b-2c1d-7e5f-a8b9-0d1e2f3a4b5c"),
    agent_id="spiffe://trust.example/agent/kyc/prod",
    issued_at=now,
    expires_at=now + timedelta(days=90),
    issuer="spiffe://trust.example/signing-authority",
    crypto_profile=CryptoProfile.standard,
    artifacts=ArtifactBindings(
        system_prompt=SystemPromptBinding(
            hash=HashValue("sha256:" + "a" * 64),
            bound_at=now,
        ),
        policy_bundle=PolicyBundleBinding(
            hash=HashValue("sha256:" + "b" * 64),
            policy_language=PolicyLanguage.cedar,
            version="1.0.0",
            enforcement_mode=EnforcementMode.enforce,
            bound_at=now,
        ),
        model_identity=ModelIdentityBinding(
            provider="anthropic",
            model_id="claude-sonnet-4-6",
            version="20251001",
            deployment_type=DeploymentType.api,
            bound_at=now,
        ),
    ),
)

keypair = generate_ed25519()
signer = Ed25519Signer(keypair)
sig_block = signer.sign(manifest.model_dump(mode="json", by_alias=True))
print(sig_block["algorithm"])   # Ed25519
print(sig_block["key_id"])      # sha256:<hex>

Composition-only manifests

Repository scanners can bind the artifacts they know before a model or runtime session exists. Set profile="composition-only" and explicitly name every artifact not bound by the document in unbound_artifacts. The verifier returns INCOMPLETE, not VALID, so this narrower document cannot be mistaken for a Level 0 agent manifest. Both fields are signature-covered.

manifest = Manifest(
    # identity, validity, issuer, and crypto fields omitted here for brevity
    profile="composition-only",
    unbound_artifacts=[
        "tool_manifest", "model_identity", "rag_corpus", "memory_baseline",
        "decision_trace", "delegation_chain", "supply_chain", "hitl_record",
    ],
    artifacts=ArtifactBindings(
        system_prompt=system_prompt_binding,
        policy_bundle=policy_bundle_binding,
    ),
)

The 10 Attested Artifacts

Hardware Attestation

from agent_manifest._auto_provider import select_provider

# auto-selects: SEV-SNP → TDX → TPM → software  (OPAQUE is explicit opt-in via OPAQUE_ATTESTATION_URL)
provider = select_provider(level=1)   # Level 1+ requires hardware
provider.extend_manifest_hash(manifest_dict)
report = provider.get_attestation_report()
# report.platform: "amd-sev-snp" | "intel-tdx" | "tpm" | "opaque" | "software"

Verification

from agent_manifest._verify import verify_manifest, VerificationContext, RevocationStore

result = verify_manifest(
    manifest_dict,
    VerificationContext(
        system_prompt_hash="sha256:...",
        policy_bundle_hash="sha256:...",
        enforce_hitl=True,
    ),
    RevocationStore(),
)
print(result.result)   # VALID | MISMATCH | EXPIRED | REVOKED | ...

CLI

pip install "agent-manifest[cli]"

manifest keygen -d ./keys/
manifest create config.json -o draft.json
manifest sign draft.json --key keys/private.hex -o signed.json
manifest attest signed.json --provider auto --level 1 -o attested.json
manifest verify attested.json --public-key keys/public.hex
manifest revoke <manifest-id> --reason "key compromise" --revoked-by security@example.com

Without --public-key the verifier has no trusted issuer key, so a signed manifest fails closed as UNVERIFIABLE and the command exits 1.

Cryptography

• Standard profile: Ed25519 (RFC 8032), SHA-256, RFC 8785 canonical JSON
• Post-quantum profile: ML-DSA-65 (NIST FIPS 204), SHAKE-256 - pip install "agent-manifest[pq]"
• Hybrid: Both signatures required, identical pre-image
• Transparency: Rekor/Sigstore integration for non-repudiation

Specification

The full Agent Manifest Specification v0.2 is at spec/agent-manifest-spec-v0.2.md.

Proposed for contribution to CoSAI Working Stream 4, an OASIS Open Project.

License

Apache 2.0