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

# Conflicts:
#	packages/ui/stdio-agent/README.md

packages/hooks/hooks-claude/README.md

@@ -1,8 +1,8 @@
 # @deepseek-ai/dsh-hooks-claude
 
-A cordis plugin that runs a user's existing **Claude Code** hook config (a `hooks.json`, or a settings file's `hooks` key) on the harness's canonical interception seams. It is the **CC dialect** half of the hooks subsystem: it owns CC's per-event stdin payloads, CC's env + `${CLAUDE_PLUGIN_ROOT}`/`${CLAUDE_PROJECT_DIR}` substitution, and the mapping from a hook's neutral outcome onto the harness's typed Decisions. The dialect-agnostic primitives (matcher, exit-code/stdout codec, `ctx.bash` execution, most-restrictive merge, the `hook/*` events) come from [`@deepseek-ai/dsh-hook-protocol`](../hook-protocol/README.md).
+A cordis plugin that runs the supported command-hook subset of a user's existing **Claude Code** hook config (a `hooks.json`, or a settings file's `hooks` key) on the harness's canonical interception seams. It is the **CC dialect** half of the hooks subsystem: it owns the bridge's CC-shaped per-event stdin payloads, CC's env + `${CLAUDE_PLUGIN_ROOT}`/`${CLAUDE_PROJECT_DIR}` substitution, and the mapping from a hook's neutral outcome onto the harness's typed Decisions. The dialect-agnostic primitives (matcher, exit-code/stdout codec, `ctx.bash` execution, most-restrictive merge, the `hook/*` events) come from [`@deepseek-ai/dsh-hook-protocol`](../hook-protocol/README.md).
 
-A native cordis plugin could do everything this bridge does — more powerfully, with typed returns and no serialization boundary. **The bridge exists only to run UNMODIFIED external CC hooks faithfully**; anything bespoke should be a native plugin on the same seams (see [the interception-seams RFC](../../../docs/rfc/implemented/feature/2026-06-30-interception-seams.md)).
+A native cordis plugin could do everything this bridge does — more powerfully, with typed returns and no serialization boundary. **The bridge exists only as a compatibility path for the mapped CC command-hook subset**; anything bespoke should be a native plugin on the same seams (see [the interception-seams RFC](../../../docs/rfc/implemented/feature/2026-06-30-interception-seams.md)).
 
 ## Config
 
@@ -26,7 +26,7 @@ In a `cordis.yml`:
     projectDir: .
 ```
 
-The config is parsed **once** at load. `configPath` is **process-level**: a relative path resolves against the process's launch cwd at load time, so a single config applies to the whole process — there is no per-session (`session/new.cwd`) config discovery yet (`TODO(per-session-hook-config)`). A read/parse failure is contained — the bridge logs a warning and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only `type: 'command'` hooks run; a `prompt`/`agent`/HTTP hook is parsed-and-skipped with a warning. A hook with no per-hook `timeout` runs under the protocol's reference default (`DEFAULT_HOOK_TIMEOUT_MS` from `dsh-hook-protocol`, 10 minutes — the CC default).
+The config is parsed **once** at load. `configPath` is **process-level**: a relative path resolves against the process's launch cwd at load time, so a single config applies to the whole process — there is no per-session (`session/new.cwd`) config discovery yet (`TODO(per-session-hook-config)`). A read/parse failure is contained — the bridge logs a warning and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only shell-form `type: 'command'` hooks run; an `http`/`mcp_tool`/`prompt`/`agent` hook is parsed-and-skipped with a warning. A hook with no per-hook `timeout` runs under the protocol's reference default (`DEFAULT_HOOK_TIMEOUT_MS` from `dsh-hook-protocol`, 10 minutes — the CC default).
 
 The hooks **themselves** run in the agent's session workspace: for the agent-scoped points the bridge passes the session's `cwd` (the `session/new.cwd`) as the hook process's working directory, so a hook's `pwd`/relative-path/marker operates in the user's project tree, not the server launch dir.
 
@@ -50,8 +50,28 @@ The matcher subject is the tool name (`PreToolUse`/`PostToolUse`), the session s
 
 Injected context carries an explicit `{ kind: 'plugin', plugin: 'hooks-claude' }` source. `agent.inject()` defaults a missing source to `{ kind: 'user' }`, which would mislabel plugin context as a user prompt — so the bridge always names itself.
 
-## Deferred (faithful-but-degraded)
+## Model Experience
 
-- **`updatedInput` (tool-input rewrite)** is logged + warned, **not honored** — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite RFC](../../../docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)).
-- **`systemMessage`** (a hook's user-facing warning) is logged + warned, **not surfaced** — there is no user-message channel on these seams yet (only model-facing `additionalContext`). The shared merge collects it; the bridge does not yet render it.
-- **Stop loop-guard.** CC breaks an infinite force-continue with `stop_hook_active` (true once a Stop hook has fired this run) plus a max-consecutive cap; both are deferred (`TODO(stop-loop-guard)`). Today `stop_hook_active` is always `false`, so a Stop hook that unconditionally blocks would force-continue every step — a hook author must self-limit until the guard lands.
+### Hook-provided context
+
+**What the model sees**: `SessionStart`, accepted prompt, post-tool, and live in-process subagent-start hooks can add source-attributed context messages; a blocking `Stop` hook adds its reason as next-step steering. Remote-child injection has no local target.
+
+**Token effect**: No cost when hooks return no context. Hook text is data-dependent, logged, and resent in later conversation requests until compaction.
+
+### Blocked prompt or tool outcome
+
+**What the model sees**: Provider-supplied reasons pass through verbatim. When absent, a blocked prompt uses exactly `blocked by UserPromptSubmit hook`, a denied tool becomes `Error: blocked by PreToolUse hook`, blocked post-tool feedback is exactly `blocked by PostToolUse hook`, and a blocking stop adds steering exactly `continue: blocked by Stop hook`. `systemMessage` and `updatedInput` are logged or warned but are not model-visible in this implementation.
+
+**Token effect**: Blocking a prompt removes that prompt's request tokens; denial or feedback adds the retained fallback or provider text; forced continuation pays another full request.
+
+## Known Limitations and Deferred Work
+
+- **Unsupported hook events (23 of Claude Code's current 30):** `Setup`, `InstructionsLoaded`, `UserPromptExpansion`, `MessageDisplay`, `PermissionRequest`, `PostToolUseFailure`, `PostToolBatch`, `PermissionDenied`, `Notification`, `TaskCreated`, `TaskCompleted`, `StopFailure`, `TeammateIdle`, `ConfigChange`, `CwdChanged`, `FileChanged`, `WorktreeCreate`, `WorktreeRemove`, `PreCompact`, `PostCompact`, `SessionEnd`, `Elicitation`, and `ElicitationResult`. Config for these events is parsed but never dispatched. The comparison baseline is Claude Code's [official hook-event reference](https://code.claude.com/docs/en/hooks#hook-events).
+- **`SessionStart` is partial:** JSON `additionalContext` is consumed, but plain stdout context, `initialUserMessage`, `sessionTitle`, `watchPaths`, `reloadSkills`, and `CLAUDE_ENV_FILE` are unsupported. The hook runs detached, so context can miss the first request (`TODO(session-start-gating)`), and the payload omits current optional fields such as `model`, `agent_type`, and `session_title`.
+- **`UserPromptSubmit` is partial:** blocking and JSON `additionalContext` work, but plain stdout context, `sessionTitle`, and `suppressOriginalPrompt` are unsupported. Unless overridden, the bridge also uses its 600-second default instead of Claude Code's event-specific 30-second command timeout.
+- **`PreToolUse` is partial:** `deny` and `ask` decisions work; `allow` does not pre-approve, `defer` is unsupported, `additionalContext` is ignored, and `updatedInput` is logged + warned but not honored ([the pre-tool-input-rewrite RFC](../../../docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)).
+- **`PostToolUse` is partial:** blocking feedback and JSON `additionalContext` work, but `updatedToolOutput` and `updatedMCPToolOutput` are unsupported and `tool_response` is flattened to text.
+- **`SubagentStart` and `SubagentStop` are partial:** both report a constant `agent_type` of `general-purpose` and use the child session id where Claude Code reports the parent session. Start context is best-effort and can only reach a live in-process child, while stop is observe-only and cannot block the subagent or feed it context. Start omits `transcript_path`; stop also omits `agent_transcript_path`, `last_assistant_message`, `background_tasks`, and `session_crons` and always reports `stop_hook_active: false`.
+- **`Stop` is partial:** blocking forces another model turn, but `stop_hook_active` is always `false`, `last_assistant_message`, `background_tasks`, and `session_crons` are omitted, and the consecutive-block cap is not implemented (`TODO(stop-loop-guard)`). An unconditionally blocking hook therefore force-continues every step unless it self-limits.
+- **Common payload and output fields are partial:** mapped event payloads omit `prompt_id`, `transcript_path`, `permission_mode`, and `effort` where Claude Code would provide them. `systemMessage` is logged + warned but not surfaced; `{"continue": false}` is recorded but does not halt the run; `suppressOutput`, `stopReason`, and `terminalSequence` are not applied (`TODO(hook-continue-false)`).
+- **Handler and config support is partial:** only shell-form command handlers run. `http`, `mcp_tool`, `prompt`, and `agent` handlers are skipped; command-handler options such as `args`, `async`, `asyncRewake`, `shell`, `if`, `once`, and `statusMessage` are not honored. Matching handlers run serially and are not deduplicated, whereas Claude Code runs them in parallel and deduplicates identical handlers. One process-level `configPath` is parsed once at load; Claude Code's layered project, user, plugin, and policy discovery and live reload are not implemented (`TODO(per-session-hook-config)`).

packages/hooks/hooks-claude/src/config.ts

@@ -1,11 +1,11 @@
 /**
- * Parse a Claude Code hook config file into the shared {@link MatcherGroup}
- * shape, faithfully to CC's `hooks.json` / settings `hooks` key format.
+ * Parse the bridge-supported subset of a Claude Code hook config file into the
+ * shared {@link MatcherGroup} shape.
  *
  * A CC config maps each event name to an array of matcher groups, each holding
  * an array of typed hooks. Only `type: 'command'` hooks run here; other types
- * (`prompt`/`agent`/`http`) are PARSED but skipped with a warning (faithful-but-
- * degraded — the same stance Codex takes). The `command` string undergoes
+ * (`http`/`mcp_tool`/`prompt`/`agent`) are parsed but skipped with a warning.
+ * The `command` string undergoes
  * `${CLAUDE_PLUGIN_ROOT}` substitution at parse time so the runner sees a literal.
  *
  * @module @deepseek-ai/dsh-hooks-claude/config

packages/hooks/hooks-claude/src/index.ts

@@ -9,14 +9,13 @@
  * merge, the `hook/*` events) come from `@deepseek-ai/dsh-hook-protocol`.
  *
  * A native cordis plugin could do everything this bridge does — more powerfully,
- * with typed returns and no serialization boundary. The bridge exists only to
- * run UNMODIFIED external CC hooks faithfully; anything bespoke should be a
- * native plugin on the same seams.
+ * with typed returns and no serialization boundary. This bridge is a
+ * compatibility path for the mapped CC command-hook subset; anything bespoke
+ * should be a native plugin on the same seams.
  *
  * Scope: the seven in-scope hook points (`SessionStart`, `UserPromptSubmit`,
  * `PreToolUse`, `PostToolUse`, `Stop`, `SubagentStart`, `SubagentStop`). Only
- * `type: 'command'` hooks run; the matcher group config + exit-code/stdout
- * protocol are byte-faithful to CC. `updatedInput` (tool-input rewrite) is
+ * shell-form `type: 'command'` hooks run. `updatedInput` (tool-input rewrite) is
  * logged + warned, not honored (deferred — see the interception-seams RFC).
  *
  * @module @deepseek-ai/dsh-hooks-claude