v0.16.29 spec/v0.5.2
microsoft/agent-host-protocolJul 9, 2026 → Jul 9, 20260 days between releases
What's New
Newer tag is a protocol spec release (spec/v0.5.2), not an SDK patch, adding resource, terminal, and input features.
New Features
- Resource request handling for both sending and receiving via the host.
- Input request persistence in `responseParts` on `chat/inputCompleted`.
- Client actions to request MCP server start or stop.
- `ToolResultTerminalCompleteContent` for terminal-style completion metadata in tool results.
- Optional `enabled` flags plus `disableUserInvocation`/`disableModelInvocation` on agent and skill customizations.
Improvements
- `_meta` provider metadata hoisted to `CustomizationBase`, wire-compatible across all customization types.
- Optional `serverInfo` on `InitializeResult` and `clientInfo` on `InitializeParams`.
- Optional `terminalCommandPrefix` on `InitializeResult`.
- New `changeset/filesReviewedChanged` action and optional `reviewed` field on `ChangesetFile`.
Upgrade Notes
This tag (spec/v0.5.2) is a protocol specification release on a separate version track from the SDK release v0.16.29, so it is not a direct SDK upgrade. The listed spec changes are additive and optional, so wire compatibility should hold; adopt new fields such as `enabled`, `_meta`, and `serverInfo` as needed. Consult the full spec diff, since the provided notes were truncated.
The Two Releases
v0.16.29
Jul 9, 2026· 4 months ago
Fixes a gRPC SDK issue to ensure chat sendMessage files are optional at the SDK boundary.
Full release notesAHP Spec v0.5.2
Jul 9, 2026· 4 months ago
Defines the protocol spec for AHP 0.5.2, establishing resource request handling, terminal content support, and input request persistence.
Full release notes