v0.0.2 spec/v0.5.1
microsoft/agent-host-protocolJul 1, 2026 → Jul 2, 20261 day between releases
What's New
Spec/v0.5.1 adds session input tracking and pagination but includes breaking protocol changes from v0.0.2.
Breaking Changes
- ListSessionsParams no longer accepts the filter field.
- The fetchTurns contract changed incompatibly, so clients relying on the previous shape must update.
New Features
- SessionState.inputNeeded aggregates outstanding input requests across chats, with session actions to add and remove entries.
- Session listing now supports cursor-based pagination.
- Multi-chat and fork features are gated by capability checks.
- AgentCustomization can specify optional model and tools fields.
- ContentRef supports an optional nonce, and tool calls can carry an optional human-readable intention.
Improvements
- SubscribeParams.delivery.maxLatencyMs lets clients request maximum subscription delivery latency, including zero for no coalescing.
- The session reducer updates InputNeeded status while the input queue is non-empty and falls back to InProgress when empty.
- ToolCallConfirmationState union distinguishes pending confirmation from pending result confirmation.
Upgrade Notes
The older v0.0.2 notes describe a pulpie package release, while spec/v0.5.1 defines the AHP protocol, so verify you are upgrading the intended artifact. Protocol clients should remove ListSessionsParams.filter, adapt to the new fetchTurns contract, and use cursor pagination. Implement session/inputNeededSet and session/inputNeededRemoved handling, and gate multi-chat/fork behavior on advertised capabilities.
The Two Releases
pulpie 0.0.2
Jul 1, 2026· 4 months ago
This is the first release under the feyninc organization, focusing on improving the Extractor/Pipeline developer experience and ensuring parity with MinerU-HTML.
Full release notesAHP Spec v0.5.1
Jul 2, 2026· 4 months ago
Defines the protocol spec for AHP 0.5.1, defining session-level input tracking, pagination, and capability checks for multi-chat scenarios.
Full release notes