refactor(agent): own model selection on each agent

scripts/gen-cordis-catalog.ts

@@ -68,7 +68,6 @@ export const SERVICE_PAGE: Record<string, string> = {
   mcpResources: 'mcp.md',
   agentLoop: 'core.md',
   agentDefaultModel: 'core.md',
-  agentModel: 'core.md',
   agentPresets: 'core.md',
   agents: 'core.md',
   approval: 'approval.md',

scripts/gen-doc-graphs.ts

@@ -641,14 +641,6 @@ const SERVICE_ROLES: ServiceRole[] = [
     consumers: ['agent-loop', 'acp', 'subagent'],
     note: 'Owns live Agent handles, the create/resume factory seam, and process-local initiator propagation.',
   },
-  {
-    key: 'agentModel',
-    pkg: 'agent-model',
-    title: 'Session model selection',
-    mode: 'core',
-    consumers: ['agent-loop', 'api-session-controller', 'acp', 'sdk-jsonrpc-server', 'headless'],
-    note: 'Reads and records Session model choices; owns the modelSelection projection and optional scoped route-switch notices.',
-  },
   {
     key: 'agentDefaultModel',
     pkg: 'agent-default-model',
@@ -1550,7 +1542,7 @@ function renderEventRelations(pkgs: Pkg[], events: readonly EventEntry[]): strin
     }
     lines.push(
       '',
-      '## Events outside the current Harness API catalog',
+      '## Non-harness or undeclared event strings seen in package source',
       '',
       renderGeneratedRegion('event-producer-consumer:undeclared', extraRows.join('\n')),
     )

scripts/no-unknown-casts.baseline.json

@@ -245,10 +245,8 @@
   },
   "packages/api/session-controller/tests/session-cold.host.spec.ts": {
     "23129d43b519124d7c915c0f1dfd075c1d84579c176678fa8905d0ba02403406": 1,
-    "36809c8a43a7b9240089e359618107af0a42e948791f0502d6366df65d43208f": 2,
     "4e05d4d65c076fff556c0dd813f53e90b8c98390825e7293033d8450a8f94ff0": 1,
-    "526a22860f8bc330caf4a3f28a28948de5c04b4e17125f04b3738808cfbd4e3e": 1,
-    "a6a04773270367c3ea0f54b577d3f766ff738afb6702e09caac1b3fa66a7397d": 1
+    "526a22860f8bc330caf4a3f28a28948de5c04b4e17125f04b3738808cfbd4e3e": 1
   },
   "packages/api/session-controller/tests/session-fork.host.spec.ts": {
     "dbbb38fac6189a3be6f7c29f8df6ef34679f5956c168d08d4f058b5d66b24089": 1

scripts/type-equiv.manifest.json

@@ -146,6 +146,11 @@
       "symbol": "Inbox",
       "source": "packages/core/agent/src/runtime-types.ts"
     },
+    {
+      "doc": "docs/subsystems/core.md",
+      "symbol": "Model",
+      "source": "packages/core/agent/src/runtime-types.ts"
+    },
     {
       "doc": "docs/subsystems/core.md",
       "symbol": "InboxTarget",
@@ -2495,12 +2500,12 @@
     {
       "doc": "docs/subsystems/core.md",
       "symbol": "ModelSelectionProjectionState",
-      "source": "packages/core/agent-model/src/types.ts"
+      "source": "packages/core/agent/src/model-selection.ts"
     },
     {
       "doc": "docs/subsystems/core.md",
       "symbol": "ModelSelectionProjection",
-      "source": "packages/core/agent-model/src/types.ts"
+      "source": "packages/core/agent/src/types.ts"
     },
     {
       "doc": "docs/subsystems/core.md",