refactor(native-chat): the registered-agents capability lives in its own module

Main's growth put protocol-version.ts one counted line over its 300-line limit once the capability
was added; like main's other per-feature capabilities, it now has its own module, and importers read
it from there.

src/main/ipc/desktop-renderer-runtime-capabilities.ts

@@ -7,10 +7,10 @@ import {
   CLAUDE_STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY,
   REPO_SEARCH_QUALIFIED_REFS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_CLIENT_LAUNCH_MODE_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY,
   type RuntimeCapability
 } from '../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../shared/structured-agent-session-registered-agents-capability'
 import { AGENT_LAUNCH_RUNTIME_CAPABILITY } from '../../shared/agent-launch-runtime-capability'
 import { AGENT_SESSION_BACKGROUND_TASK_CHILD_VIEWS_CAPABILITY } from '../../shared/agent-session-background-task-child-views-capability'
 

src/main/runtime/rpc/methods/agent-launch-caller-renders.test.ts

@@ -7,10 +7,8 @@
  */
 
 import { beforeEach, describe, expect, it, vi } from 'vitest'
-import {
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY
-} from '../../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY } from '../../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../../shared/structured-agent-session-registered-agents-capability'
 import type { RpcContext } from '../core'
 import {
   CAPABLE_CLIENT,

src/main/runtime/rpc/methods/session-tab-registered-agent-projection.test.ts

@@ -1,9 +1,9 @@
 import { describe, expect, it } from 'vitest'
 import {
   CLAUDE_STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY
 } from '../../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../../shared/structured-agent-session-registered-agents-capability'
 import type { RuntimeMobileSessionTabsSnapshot } from '../../../../shared/runtime-types'
 import {
   STRUCTURED_CHAT_UPDATE_REQUIRED_TAB_TITLE,

src/main/runtime/rpc/methods/structured-agent-session-policy.ts

@@ -1,10 +1,10 @@
 import {
   CLAUDE_STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_CLIENT_LAUNCH_MODE_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY,
   type RuntimeCapability
 } from '../../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../../shared/structured-agent-session-registered-agents-capability'
 import type { OrcaRuntimeService } from '../../orca-runtime'
 import type { RpcContext } from '../core'
 

src/main/runtime/rpc/methods/structured-agent-session-restart-dismiss-fence.test.ts

@@ -10,7 +10,7 @@ import {
   AgentSessionRecoveryCapsule
 } from '../../agent-session-recovery-capsule'
 import { DESKTOP_RENDERER_RUNTIME_CLIENT_CAPABILITIES } from '../../../ipc/desktop-renderer-runtime-capabilities'
-import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../../shared/structured-agent-session-registered-agents-capability'
 import { CLAUDE_STRUCTURED_AGENT } from '../../../claude/claude-structured-agent-definition'
 import { CODEX_STRUCTURED_AGENT } from '../../../codex/codex-structured-agent-definition'
 import type { StructuredAgentSessionAdapter } from '../../../native-chat/agent-session-wire/structured-agent-session-adapter'

src/main/runtime/rpc/methods/structured-agent-session-restart-resume.test.ts

@@ -8,7 +8,7 @@ import {
   restartRowsFor,
   type StructuredAgentSessionRestartAudience
 } from '../../../native-chat/agent-session-wire/structured-agent-session-restart-resume-set'
-import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../../shared/structured-agent-session-registered-agents-capability'
 import { DESKTOP_RENDERER_RUNTIME_CLIENT_CAPABILITIES } from '../../../ipc/desktop-renderer-runtime-capabilities'
 import {
   call,

src/renderer/src/lib/agent-launch-route-registered-agents.test.ts

@@ -1,10 +1,10 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import {
   STRUCTURED_AGENT_SESSION_CLIENT_LAUNCH_MODE_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY,
   type RuntimeCapability
 } from '../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../shared/structured-agent-session-registered-agents-capability'
 import type { RuntimeEnvironmentStatus } from '../../../shared/runtime-host-status'
 import type { TuiAgent } from '../../../shared/tui-agent'
 

src/renderer/src/runtime/host-structured-agents.test.ts

@@ -1,9 +1,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { ELECTRON_REMOTE_RUNTIME_CLIENT_CAPABILITIES } from '../../../shared/electron-remote-runtime-client-capabilities'
-import {
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY
-} from '../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY } from '../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../shared/structured-agent-session-registered-agents-capability'
 import type { RuntimeEnvironmentStatus } from '../../../shared/runtime-host-status'
 import type { RuntimeCapability } from '../../../shared/protocol-version'
 

src/renderer/src/runtime/host-structured-agents.ts

@@ -4,7 +4,7 @@ import {
   type AgentSessionRegisteredAgent
 } from '../../../shared/agent-session-registered-agents'
 import { parseExecutionHostId } from '../../../shared/execution-host'
-import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../shared/structured-agent-session-registered-agents-capability'
 import { lastVerifiedRuntimeStatus } from '../../../shared/runtime-host-status'
 import type { RuntimeEnvironmentStatus } from '../../../shared/runtime-host-status'
 import { callRuntimeRpc } from './runtime-rpc-client'

src/shared/electron-remote-runtime-client-capabilities.ts

@@ -7,10 +7,10 @@ import {
   NATIVE_REMOTE_RUNTIME_CLIENT_CAPABILITIES,
   SESSION_TABS_RETIREMENT_PROOF_DELTA_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_CLIENT_LAUNCH_MODE_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY,
   WORKTREE_BACKGROUND_REMOVAL_RUNTIME_CAPABILITY
 } from './protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from './structured-agent-session-registered-agents-capability'
 
 // Electron clients can decode client-hosted page placement; becoming a page
 // host still requires the separate authenticated browser-client lease.

src/shared/protocol-version.ts

@@ -14,6 +14,7 @@ export {
 } from './agent-session-resume-runtime-capabilities'
 import { AGENT_SESSION_BACKGROUND_TASK_CHILD_VIEWS_CAPABILITY } from './agent-session-background-task-child-views-capability'
 import { AGENT_SESSION_STOP_RUNTIME_CAPABILITIES } from './agent-session-stop-capabilities'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from './structured-agent-session-registered-agents-capability'
 import { REMOTE_SERVER_UPDATE_CAPABILITY } from './remote-server-update'
 import {
   SKILL_BUNDLE_INSTALL_CAPABILITY,
@@ -233,14 +234,6 @@ export const AGENT_SESSION_QUEUED_MESSAGES_RUNTIME_CAPABILITY =
 // journal and lifecycle surfaces independently from Codex support.
 export const CLAUDE_STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY =
   'agent-session.structured.claude.v1' as const
-// Why: a host's structured agents are the ones it registered, not a list every build ships. A host
-// advertising this accepts any agent it lists through `agentSession.agents` (with each agent's
-// capability record) in `agentSession.*` params, and refuses one it did not register; a client
-// offers an agent beyond Claude and Codex only to such a host. A client advertising it renders an
-// `agent-session` tab of any agent its host lists; the host withholds every other agent's tabs from
-// a client that does not (an older client would list them with an empty pane).
-export const STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY =
-  'agent-session.structured.registered-agents.v1' as const
 // Why: paired structured clients explicitly hold every visible session surface, allowing the host
 // to stop provider children after the last surface closes without tying lifetime to a transport.
 export const STRUCTURED_AGENT_SESSION_HOLD_RUNTIME_CAPABILITY =

src/shared/structured-agent-session-registered-agents-capability.ts

@@ -0,0 +1,8 @@
+// Why: a host's structured agents are the ones it registered, not a list every build ships. A host
+// advertising this accepts any agent it lists through `agentSession.agents` (with each agent's
+// capability record) in `agentSession.*` params, and refuses one it did not register; a client
+// offers an agent beyond Claude and Codex only to such a host. A client advertising it renders an
+// `agent-session` tab of any agent its host lists; the host withholds every other agent's tabs from
+// a client that does not (an older client would list them with an empty pane).
+export const STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY =
+  'agent-session.structured.registered-agents.v1' as const

src/shared/structured-native-chat-launch-route.test.ts

@@ -4,10 +4,8 @@
  */
 
 import { describe, expect, it } from 'vitest'
-import {
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY
-} from './protocol-version'
+import { STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY } from './protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from './structured-agent-session-registered-agents-capability'
 import {
   agentTabsDefaultToNativeChat,
   prefersStructuredNativeChatByDefault,

src/shared/structured-native-chat-launch-route.ts

@@ -14,9 +14,9 @@ import type { GlobalSettings } from './global-settings-types'
 import type { ProjectExecutionRuntimeResolution } from './project-execution-runtime'
 import {
   STRUCTURED_AGENT_SESSION_CLIENT_LAUNCH_MODE_CAPABILITY,
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY
 } from './protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from './structured-agent-session-registered-agents-capability'
 import type { TuiAgent } from './tui-agent'
 import type { WorkspaceLaunchKind } from './workspace-launch-kind'
 

tests/e2e/cross-version-wire/cross-version-registered-agents.unit.test.ts

@@ -25,9 +25,9 @@ import type { AgentSessionRecord } from '../../../src/shared/agent-session-recor
 import { codexProviderHandle } from '../../../src/shared/agent-session-provider-handle-encoding'
 import {
   RUNTIME_CAPABILITIES,
-  STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY,
   STRUCTURED_AGENT_SESSION_RUNTIME_CAPABILITY
 } from '../../../src/shared/protocol-version'
+import { STRUCTURED_AGENT_SESSION_REGISTERED_AGENTS_RUNTIME_CAPABILITY } from '../../../src/shared/structured-agent-session-registered-agents-capability'
 import type { RuntimeMobileSessionTabsSnapshot } from '../../../src/shared/runtime-types'
 import { resolveStructuredNativeChatSupport } from '../../../src/shared/structured-native-chat-launch-route'
 import { parseWorkspaceSession } from '../../../src/shared/workspace-session-schema'