What 11 agent runtimes documented about their hooks on 25 September 2026, scored against the AgentHook v0.2 tiers. This is a dated research snapshot, not a live ranking: runtimes change their hooks often, and formal tiers will only come from the conformance test harness.
Which AgentHook lifecycle events each runtime documented on 25 September 2026, scored against the conformance tiers. Any runtime can move tier by exposing the missing hooks; the AgentHook specification itself does not need to change for them to do so.
Audit method: direct inspection of each runtime's official hook, plugin or callback documentation and changelogs, and of the public Agentic Thinking publisher repositories, re-audited on 25 September 2026 against the AgentHook v0.2 draft specification (previous review 19 May 2026). Tiers shown are preliminary indicators of what each runtime's documented hook surface makes possible, not test results; formal Bronze, Silver, and Gold tiers will be awarded by the AgentHook conformance test harness once it ships alongside specification v1.0. Silver needs matched hooks before and after each model call, so runtimes without them are Bronze-capable whatever else they expose. No runtime has yet shown Gold end to end: Hermes captures reasoning only when a publisher enables it, and retry correlation is undocumented elsewhere. The OpenClaw row describes its embedded and CLI runtime; its docs say not every harness emits every hook. Our six publishers were last updated on 6 May 2026 and do not yet use hooks added since. Runtime providers may self-attest by Pull Request to the AgentHook repository. This audit is for technical interoperability comparison, not procurement guidance. Snapshot date: 25 September 2026. We do not maintain this as a live ranking; runtime providers can submit updates by pull request.
Microsoft Agent Governance Toolkit is tracked as a control and subscriber layer, not as an agent runtime publisher. Sources for every row are listed below.
Official documentation and changelogs, all checked on 25 September 2026. Where the documentation did not say, we did not mark a capability as present.