$ git log --graph --oneline --all

Changelog

A complete record of every change to the Open Agent Specification. Versioned under strict SemVer.

v1.1.0latest

2026-04-01(release/v1.1)

+Three conformance levels: L0 (Basic Identity), L1 (Verifiable Lineage), L2 (Full Attestation)

+Autonomous Organization (ao) entity kind with DID-based governance model

+FROST threshold signature support for MHR identities (t-of-n signing)

+Agent Instance (agent:instance) entity kind for ephemeral runtime state

~DID document schema updated to include conformanceLevel field

~Lineage proof format now requires explicit derivation method declaration

xJCS canonicalization edge case with nested arrays in service endpoints

!Enforce constant-time comparison for all signature verification paths

v1.0.0stable

2026-01-15

+did:oas DID method with namespace, kind, and identifier components

+11 entity kinds: hmr, mhr, enr, agent, agent:instance, tool, skill, workflow, model, dataset, service

+AgentLineageProof2025 format with HKDF-SHA256 key derivation

+Ed25519 verification method as mandatory cryptographic primitive

+BLAKE3 content hashing for DID document integrity

+7 SDK implementations: Rust, TypeScript, Go, Python, Swift, Kotlin, Vanilla JS

+WASM compilation target for cross-language cryptographic parity

v0.9.0legacy

2025-11-01

~Renamed AgentLineageProof2024 to AgentLineageProof2025 to match release year

~Identifier encoding switched from base64url to multibase (base58btc)

~Service endpoint format aligned with DID Core recommendation

-Removed deprecated x25519KeyAgreement verification method type

xDID resolution for self-issued identities without network namespace

xHKDF context string collision for agents sharing the same parent key

+added

~changed

xfixed

-removed

!security