Merge branch 'codex/simp-agent-entry-state' into codex/simp-unify-agent-session-id

# Conflicts:
#	docs/config-catalog.md
#	docs/cordis-catalog/services.md
#	docs/event-producer-consumer.md
#	docs/rfc/implemented/architecture/2026-06-18-agent-lifecycle-and-ownership-seams.md
#	docs/rfc/implemented/architecture/2026-06-20-branded-ids.md
#	docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md
#	docs/rfc/proposed/feature/2026-07-07-claude-code-and-codex-subagent-backends.md
#	docs/rfc/proposed/simplification/2026-06-20-unify-agent-and-session-id.md
#	packages/bash/tool-bash/README.md
#	packages/bash/tool-bash/src/index.ts
#	packages/bash/tool-bash/tests/tools.spec.ts
#	packages/core/agent-loop/README.md
#	packages/core/agent-loop/tests/properties.spec.ts
#	packages/core/agent/README.md
#	packages/core/agent/src/index.ts
#	packages/guard/repeat-tool-guard/src/index.ts
#	packages/hooks/hooks-claude/tests/bridge.spec.ts
#	packages/subagent/subagent-acp/tests/mock-acp-server.ts
#	packages/ui/acp/tests/dispose.spec.ts
#	packages/ui/stdio-agent/src/index.ts
#	packages/ui/stdio-agent/src/stdio-chat.ts
#	packages/ui/stdio-agent/tests/stdio-chat.spec.ts
#	packages/util/brand/src/index.ts

packages/subagent/subagent-acp/tests/subagent-acp.e2e.ts

@@ -9,16 +9,9 @@ import SubagentService from '@deepseek-ai/dsh-subagent'
 import * as acp from '../src/index.ts'
 
 /**
- * With-key e2e for the ACP subagent backend: the harness drives ITSELF as an ACP
- * server. The backend spawns the real `acp-agent` example as a child PROCESS,
- * speaks ACP to it over stdio, and the child runs the REAL model in its own
- * process to answer a prompt. We verify the child's real answer comes back
- * through the seam — the "talk to our own process" smoke the design called for.
- * Key-gated (self-skips without DEEPSEEK_API_KEY).
- *
- * This is the out-of-process analogue of the in-process spawn e2e: there a
- * parent agent on the same context drove a child; here the child is a separate
- * process reached over ACP, proving the seam generalizes across the boundary.
+ * With-key cross-process seam proof: the backend spawns the real acp-agent example, speaks ACP over
+ * stdio, and returns its real model answer. This is the out-of-process counterpart to in-process
+ * spawn coverage and self-skips without `DEEPSEEK_API_KEY`.
  */
 
 // The real acp-agent example: its bin + cordis.yml (the live DeepSeek config).