Merge remote-tracking branch 'origin/master' into stack/agent-profiles-1-seam

# Conflicts:
#	packages/README.i18n.yaml
#	packages/README.zh.md
#	packages/boot/app-boot/README.i18n.yaml
#	packages/boot/app-boot/README.zh.md
#	scripts/gen-cordis-catalog.ts
#	scripts/verify-package-readme-model-experience.ts

scripts/gen-doc-graphs.ts

@@ -314,6 +314,14 @@ const SERVICE_ROLES: ServiceRole[] = [
     consumers: ['agent-loop', 'acp', 'subagent-inprocess'],
     note: 'Owns live Agent handles, the create/resume factory seam, and process-local initiator propagation.',
   },
+  {
+    key: 'agentDefaultModel',
+    pkg: 'agent-default-model',
+    title: 'Default Agent model selection',
+    mode: 'core',
+    consumers: ['headless', 'host-apiproxy'],
+    note: 'Layers the default ModelSelection through settings so direct and Host-backed Agent front doors share one state owner.',
+  },
   {
     key: 'agentLoop',
     pkg: 'agent-loop',
@@ -1229,7 +1237,7 @@ function renderLifecycle(): string {
     `  Driver-->>SDK: ${mermaidCode('agent/status')} idle`,
     '```',
     '',
-    'The `assistant/message` edge records every successful provider call, including content-less and `max-tokens` finishes. Empty content stays out of derived history while the durable anchor retains usage and exact chunk provenance, including an explicit empty source set.',
+    'The `assistant/message` event records every successful provider call, including content-less and `max-tokens` finishes. Empty content stays out of derived history, while the durable event keeps usage and `sourceEventSeqs` listing the exact `assistant/chunk` events, including an explicit empty list.',
     '',
     '`dsh-compact-basic` uses `agent/pre-step` for pressure before request derivation and `agent/request-error` only for canonical context overflow. Once either trigger qualifies, optional tool-result pruning runs before summary selection. Recovery works between the closed failed step and failed turn close, and opens a fresh retry turn only when pruning or summarization advances the surface replacement generation; otherwise the original request error remains authoritative.',
     '',