agenttombstone.com

A cryptographically signed archival document created at the moment of an AI agent's decommissioning, capturing its final state, configuration, and operational history. This record enables post-hoc audit, compliance verification, and forensic reconstruction of the agent's lifecycle. It functions as an immutable ledger entry ensuring that terminated agents leave a verifiable trace within enterprise governance systems.

A deterministic, point-in-time serialization of an agent's complete internal state taken immediately prior to termination, including memory buffers, task queues, and credential bindings. The snapshot enables future re-instantiation or comparative analysis against successor agents. Snapshot integrity is validated through hash-chaining against prior operational checkpoints.

A standardized set of conditions and signals that formally initiate the termination sequence of an AI agent, including threshold breaches, explicit operator commands, and policy-driven lifecycle expirations. Each trigger is logged with a provenance chain linking the causal event to the responsible authority. The protocol enforces non-repudiation so that decommissioning actions cannot be unilaterally reversed without audit visibility.

The formal invalidation of all cryptographic credentials, decentralized identifiers, and access tokens bound to an agent at the time of its termination, propagated across all dependent systems. Revocation entries are published to distributed revocation registries to prevent replay attacks using legacy credentials. This process is analogous to certificate revocation in PKI but scoped to the full identity surface of an autonomous agent.

A digitally signed attestation issued by a governing orchestration layer confirming that an agent completed its assigned operational lifecycle without unresolved obligations or integrity violations. The certificate references the agent's tombstone record and provides a human-readable summary of task outcomes. It serves as a compliance artifact for regulated environments requiring proof of orderly agent retirement.

The structured transfer of incomplete tasks, pending obligations, and open delegations from a terminating agent to a successor or supervisory agent, governed by a handoff manifest. The manifest enumerates each unresolved item with its priority, deadline, and contextual dependencies. Residual task handoff prevents workflow disruption while maintaining auditability of task ownership transitions.

A cryptographic digest computed over the complete contents of an agent tombstone record, used to detect tampering or unauthorized modification after archival. The hash is anchored to an immutable ledger or timestamping authority to establish temporal proof of existence at decommissioning. Integrity verification workflows consume this hash before any post-termination audit or forensic analysis.

The automatic invalidation of short-lived cryptographic credentials issued to an agent for the duration of a specific task or session, triggered upon task completion or agent termination. Ephemeral credentials reduce the attack surface by ensuring that no long-lived secrets persist beyond an agent's operational window. Their expiry schedules are encoded in credential issuance policies and enforced by the issuing identity authority.

A defined retention period following agent decommissioning during which the tombstone record and associated logs remain accessible to authorized auditors for compliance review and incident investigation. The window duration is specified by organizational policy and may be extended in response to active investigations. Access controls during this window restrict modification rights while preserving read access for authorized principals.

A resolvable reference embedded in a tombstone record that links to the identity and instantiation record of any successor agent designated to assume the terminated agent's responsibilities. The pointer enables dependency graphs and orchestration systems to route subsequent requests without manual reconfiguration. Succession pointers are cryptographically bound to the tombstone to prevent unauthorized redirection.

An ordered series of operational steps executed by an agent upon receiving a termination signal, designed to preserve data integrity, honor in-flight commitments, and notify dependent systems before ceasing operation. The sequence is defined in the agent's operational specification and must complete within a configurable timeout before forced termination is applied. Graceful shutdown reduces the incidence of orphaned tasks and inconsistent distributed state.

An ordered, cryptographically linked sequence of records documenting every causal event, authorization decision, and system action that led to an agent's decommissioning. Each link in the chain references its predecessor by hash, ensuring tamper-evident reconstruction of the termination rationale. The chain satisfies non-repudiation requirements for regulated industries where agent lifecycle decisions carry legal or compliance weight.

A systematic process by which a terminating agent resolves, transfers, or formally closes all outstanding dependencies — including subscriptions, locks, message queues, and resource reservations — before its tombstone record is finalized. Failure to complete the drain procedure triggers escalation to a supervisory agent or human operator. Dependency drain metrics are recorded in the tombstone record as evidence of complete lifecycle closure.

The act of writing a finalized tombstone record to a shared, tamper-evident registry accessible to all systems that interacted with the terminated agent during its operational life. Publication enables third-party verification that decommissioning occurred and provides a canonical reference point for post-mortem analysis. Registry entries are signed by the publishing orchestration authority and timestamped by an independent service.

A formally specified encoding scheme applied to tombstone records before long-term storage to minimize retention costs while preserving complete fidelity of the archived state. The standard defines both lossless compression algorithms and metadata envelope formats that enable future decompression without requiring the original agent runtime environment. Compliance with the archival standard is verified by checksum validation on ingestion.