Connor PeetandGitHub c7e690b5f5 agentHost: adopt channel-based AHP wire model (#317251)
* agentHost: adopt channel-based AHP wire model

Adopts the channel-based Agent Host Protocol revision from
microsoft/agent-host-protocol#127. Subscriptions, action delivery, and
protocol notifications now all route over named channels identified by a
top-level `channel: URI` field, replacing the pre-channels subscribe /
dispatch / notify model.

- Renames `ROOT_STATE_URI` from `agenthost:/root` to `ahp-root://` and
  adds an `isAhpRootChannel` helper that tolerates both the canonical
  wire form and the workbench `URI` round-tripped form (`ahp-root:`).
- Threads a `channel` parameter through every action dispatch path:
  `IAgentService.dispatchAction`, `IAgentConnection.dispatch`,
  `AgentHostStateManager.dispatchServerAction` / `dispatchClientAction`,
  and `AgentSubscriptionManager.dispatchOptimistic`. Individual action
  payloads no longer carry `session` / `terminal` / `changeset` fields;
  the envelope carries the channel.
- Replaces the `{ method: 'notification', params: { notification } }`
  wrapper with top-level JSON-RPC methods (`root/sessionAdded`,
  `root/sessionRemoved`, `root/sessionSummaryChanged`, `auth/required`).
  Each notification's params now carry their own `channel: URI` field.
- Renames the per-command identifying field to `channel` for the channel-
  scoped commands (`createSession`, `disposeSession`, `createTerminal`,
  `disposeTerminal`, `fetchTurns`, `completions`,
  `invokeChangesetOperation`). Connection-level commands hard-code the
  root channel string.
- Updates the subscribe result to `{ snapshot? }` and the
  `SubscribeParams` / `UnsubscribeParams` field name from `resource` to
  `channel`.
- Drops the removed `ProtocolNotification`, `NotificationType`,
  `NotificationMethodParams`, and `NotificationMap` exports; provides a
  thin compat `NotificationType` constant keyed by method name for
  consumers that still discriminate notification variants.
- Adapts `AgentSubscription` routing to switch on `envelope.channel`
  rather than inspecting per-action URI fields (`_isRelevantEnvelope`
  replaces `_isRelevantAction`).
- Migrates all producers (`agentService`, `agentSideEffects`,
  `agentConfigurationService`, `agentHostChangesetService`,
  `agentHostTerminalManager`, `agentHostStateManager`,
  `protocolServerHandler`, Claude/Copilot agent sessions, terminal
  manager, etc.) and consumers (workbench session handler, terminal
  contribution, pty, customization harness, provider tests) to the new
  shapes.

(Commit message generated by Copilot)

* agentHost: address Copilot review for channels migration

Addresses feedback from Copilot's review of #317251:

- Update real-SDK integration test helpers and protocol integration
  tests to use the channel-based command shapes (rename `session` /
  `resource` to `channel`, add `channel: 'ahp-root://'` to
  connection-level commands, drop `session` from action payloads, route
  via params-level `channel`).
- Treat the canonical `ahp-root://` and the URI-normalized `ahp-root:`
  forms as equivalent in `_isRelevantToClient` so root broadcasts reach
  a client that subscribed using either form (mirrors `isAhpRootChannel`
  already in use elsewhere).
- Drop a `..` hop from the `NotificationType` import path in the local
  and remote session-provider tests; import from
  `state/sessionActions.js` directly.
- Drop a stale post-merge `session: SESSION_STR` in
  `claudeMapSessionEvents.test.ts:Test 9.5` and the matching
  `requestResourceAccess` test expectation in
  `agentHostFileSystemProvider.test.ts` so they match the new
  channel-based shapes (root cause of the macOS browser CI failure).

(Commit message generated by Copilot)

* tests

* import
2026-05-19 17:28:04 +00:00
2026-04-17 21:23:43 +00:00
2026-05-15 12:43:43 -04:00

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