refactor(agent): make runtime identity explicit

scripts/gen-cordis-catalog.ts

@@ -144,7 +144,6 @@ export const SERVICE_PAGE: Record<string, string> = {
  * to a model as `cordis_runtime_inspect what:"client"`).
  */
 export const SERVICE_WALK_EXEMPTIONS: Record<string, string> = {
-  agent: 'not a service: the DX accessor field on Agent.ctx (root accessor defaulting to undefined) — docs/subsystems/core.md owns the Agent handle',
   appReady: 'not a service: launcher-provided successful-startup signal — packages/boot/cmdline/README.md owns the launcher contract',
   appExit: 'not a service: launcher-provided bounded process-exit callback — packages/boot/cmdline/README.md owns the launcher contract',
   cmdlineArgs: 'not a service: launcher-provided immutable app argument accessor — packages/boot/cmdline/README.md owns the launcher contract',