diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml
index 8d57b6fdcc..809c14dedb 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml
@@ -3,4 +3,4 @@
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-06-30-hook-bridges.md
 2026-06-30-hook-bridges.md: 99c6b1941a10e198ec3028f5fe505dabfff9abbe
-2026-06-30-hook-bridges.zh.md: 11ed3a5d177661271b30f1a58d034caa577b5348
+2026-06-30-hook-bridges.zh.md: 66855c3c4f36877aa627173de8e73250546e9621
diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md
index 11ed3a5d17..66855c3c4f 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md
@@ -15,7 +15,7 @@ harness 的扩展面是其类型化的拦截 seam（见[拦截 seam Agent Note](
 `packages/hooks/` 组下两个独立插件，各为 function/namespace 插件（`name`/`inject`/`Config`/`apply`，无 default export——见[事后复盘 0001](../../../../docs/postmortem/0001-acp-default-export-drops-inject.md)），仅注入 `bash`：
 
 - **`dsh-hooks-claude`**——CC 方言。Claude Code 当前七个钩子点中的七个：`SessionStart`、`UserPromptSubmit`、`PreToolUse`、`PostToolUse`、`Stop`、`SubagentStart` 和 `SubagentStop`。拥有 CC 形态的每事件 stdin payload（基础字段 `session_id`/`transcript_path`/`cwd`/`hook_event_name` 加每事件字段）、`CLAUDE_PROJECT_DIR` 环境变量加 `${CLAUDE_PLUGIN_ROOT}`/`${CLAUDE_PROJECT_DIR}` 替换，以及字面量或正则的匹配模式。`transcript_path` 是持久化定位器结果或 `''`；stdin 带有**尾部换行**。
-- **`dsh-hooks-codex`**——Codex 当前五个钩子点中的五个：`PreToolUse`、`PostToolUse`、`SessionStart`、`UserPromptSubmit` 和 `Stop`。使用始终为正则的匹配模式、Codex 形态的 snake_case payload（含 `turn_id`/`model`/`permission_mode` 额外字段），写入时不带尾部换行，不注入 Codex 插件环境变量，不做配置时占位符替换，也没有 pre-tool 审批或重写路径。`transcript_path` 是同一定位器结果或 `null`；工具 payload 在精简后的 `tool_input: { command }` 形态中携带真实的 `tool_name`。
+- **`dsh-hooks-codex`**——Codex 当前五个钩子点中的五个：`PreToolUse`、`PostToolUse`、`SessionStart`、`UserPromptSubmit` 和 `Stop`。它使用始终按正则解释的 matcher，输出 Codex 形态的 snake_case payload（含 `turn_id`/`model`/`permission_mode` 额外字段）且写入时不带尾部换行，不注入 Codex 插件环境变量，不做配置时占位符替换，也没有 pre-tool 审批或重写路径。`transcript_path` 是同一定位器结果或 `null`；工具 payload 在精简后的 `tool_input: { command }` 形态中携带真实的 `tool_name`。
 
 ### Outcome → Decision 映射
 
diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.i18n.yaml b/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.i18n.yaml
index 260ea57905..3ecd4e2dbe 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.md
-2026-06-30-hook-protocol-lib.md: 33ec23dd4fa6aa8b4966bbe6c0ca5697ec83056c
-2026-06-30-hook-protocol-lib.zh.md: 8e8c89a4ecca3bea98fb26bc55974765f27f6a11
+2026-06-30-hook-protocol-lib.md: ce25f40e96ffd5c319d9845e36eab5130cec5857
+2026-06-30-hook-protocol-lib.zh.md: 062160931f52576e65557b6e0d385ccaac54aceb
diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.md b/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.md
index 33ec23dd4f..ce25f40e96 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.md
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.md
@@ -15,7 +15,7 @@ This Agent Note introduces `@deepseek-ai/dsh-hook-protocol`, a **library** (not
 A new `packages/hooks/` group with `hook-protocol` as a pure library. It owns four primitive families and the `hook/*` session events; each bridge plugin (`dsh-hooks-claude`, `dsh-hooks-codex`) owns what genuinely differs.
 
 **Shared (here):**
-- **Matcher** — `matchesMatcher(pattern, query, mode)`. The ONE axis the dialects differ on is collapsed to the `mode` parameter: `claude` treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` is always an unanchored regex. Match-all on absent/`''`/`'*'`; an invalid regex matches nothing (never throws into the loop).
+- **Matcher** — `matcherDiagnostic(pattern, mode)` and `matchesMatcher(pattern, query, mode)`. The ONE axis the dialects differ on is collapsed to the `mode` parameter: `claude` treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` is always an unanchored regex. Match-all on absent/`''`/`'*'`. Each bridge ignores unsupported events before group parsing, discards matcher fields on supported events without matcher subjects, validates the remaining runnable groups, and treats an invalid regex there as a whole-config load failure, with a stable dialect/pattern/event diagnostic; no hook listeners are registered. Runtime matching still contains an invalid regex as a non-match, so a direct library caller never throws into the loop.
 - **Execution** — `runHook(bash, hook, options)`. Runs a command hook through the `ctx.bash` seam rather than a bespoke `spawn`: the executor already provides the scrubbed-but-overridable env, process-group kills, and timeout the protocol needs, and `dsh-bash`'s `stdin`/`env` fields (added for exactly this) are the trusted-plugin surface an in-process bridge is allowed to use. It serializes the bridge-built payload to stdin (trailing newline iff CC), honors the hook's `timeoutSec` (else `DEFAULT_HOOK_TIMEOUT_MS`, the 10-minute reference default both dialects share), and never throws (an executor rejection becomes a non-blocking-error `HookOutput`).
 - **Decode** — `parseHookOutput(exit, stdout, stderr)`, the exit-code + structured-stdout codec, producing a dialect-neutral `HookOutput`. Exit `0` → lenient JSON parse of stdout; exit `2` → blocking error with `stderr` as the reason (surfaced as `decision: 'block'` so no caller needs a separate exit-code branch); other → non-blocking error. Parses the CC structured-stdout fields that have a consumer on some path (`continue`/`stopReason`/`decision`/`hookSpecificOutput.{permissionDecision,additionalContext,updatedInput}`/`systemMessage`); the bridge honors only the subset meaningful for its dialect. Fields with no consumer on any path are not parsed at all (CC's `suppressOutput` — hook stdout never enters a transcript here, so there is nothing to suppress; see [the tighten-hook-protocol-contract Agent Note](../simplification/2026-07-04-tighten-hook-protocol-contract.md)).
 - **Merge** — `mergeHookOutputs(outputs)`, folding multiple matched hooks into one most-restrictive `MergedHookOutcome`: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined `\n\n`, context/system-messages accumulated in order.
@@ -29,4 +29,4 @@ A new `packages/hooks/` group with `hook-protocol` as a pure library. It owns fo
 
 ## Consequences
 
-Each bridge parses config, builds its dialect payload, invokes the shared runner and merge logic, maps the decision, and appends `hook/*`. Protocol tests cover every matcher mode, exit-code and codec field, runner plumbing, merge precedence, and audit helper at per-file 100%; bridge tests exercise the library's real load path. `updatedInput` is parsed but only logged and warned until the [input-rewrite proposal](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md) lands.
+Each bridge parses config atomically, builds its dialect payload, invokes the shared runner and merge logic, maps the decision, and appends `hook/*`. Protocol tests cover every matcher mode and diagnostic, exit-code and codec field, runner plumbing, merge precedence, and audit helper at per-file 100%; bridge tests exercise the library's load path and pin the exact warning. Keyless ACP snapshots boot both bridges through the real Loader/app path with a valid blocking group before an invalid matcher, then prove the request reaches the replay model and persists no `hook/*` rows, so partial registration cannot hide behind a hand-mounted context. `updatedInput` is parsed but only logged and warned until the [input-rewrite proposal](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md) lands.
diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.zh.md b/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.zh.md
index 8e8c89a4ec..062160931f 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.zh.md
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-protocol-lib.zh.md
@@ -15,7 +15,7 @@ Status: implemented
 在 `packages/hooks/` 分组下新建 `hook-protocol` 作为纯库。它拥有四个原语族和 `hook/*` 会话事件；每个桥接插件（`dsh-hooks-claude`、`dsh-hooks-codex`）拥有真正不同的部分。
 
 **共享（本库）：**
-- **Matcher** — `matchesMatcher(pattern, query, mode)`。两种方言唯一不同的轴被收敛为 `mode` 参数：`claude` 将纯 `[A-Za-z0-9_|]+` 模式视为字面量（管道符 = 精确匹配的多选），其余视为正则；`codex` 始终是无锚定正则。缺省/`''`/`'*'` 匹配一切；无效正则匹配空集（绝不向 agent loop（智能体循环）抛异常）。
+- **Matcher** — `matcherDiagnostic(pattern, mode)` 与 `matchesMatcher(pattern, query, mode)`。两种方言的唯一差异收敛到 `mode` 参数：`claude` 将纯 `[A-Za-z0-9_|]+` pattern 视为字面量（管道符 = 精确匹配多选），其他 pattern 视为正则；`codex` 始终使用未锚定正则。缺省/`''`/`'*'` 匹配一切。每个桥接插件会在解析 group 前忽略不支持的事件，丢弃受支持但没有 matcher 匹配对象的事件所带字段，校验其余可运行 group；其中任何无效正则都会导致整份配置加载失败，并给出包含方言／pattern／事件的稳定诊断，不会注册任何钩子监听器。运行时匹配仍会将无效正则隔离为不匹配，因此直接调用本库绝不向 agent loop（智能体循环）抛异常。
 - **执行** — `runHook(bash, hook, options)`。通过 `ctx.bash` seam 而非自建 `spawn` 运行命令钩子：执行器已提供清洗但可覆盖的 env、进程组 kill 和超时，正是协议所需的能力；`dsh-bash` 的 `stdin`/`env` 字段（正是为此添加的）是进程内桥接插件被允许使用的受信插件接口。它将桥接插件构建的 payload 序列化到 stdin（CC 时追加尾部换行），遵守钩子的 `timeoutSec`（否则使用 `DEFAULT_HOOK_TIMEOUT_MS`，即两种方言共享的 10 分钟参考默认值），且从不抛异常（执行器拒绝变为 non-blocking-error 的 `HookOutput`）。
 - **解码** — `parseHookOutput(exit, stdout, stderr)`，exit-code + structured-stdout 编解码器，产出方言无关的 `HookOutput`。Exit `0` → 宽松 JSON 解析 stdout；exit `2` → blocking error，`stderr` 为原因（以 `decision: 'block'` 呈现，调用方无需单独处理 exit-code 分支）；其他 → non-blocking error。解析 CC structured-stdout 中在某条路径上有消费方的字段（`continue`/`stopReason`/`decision`/`hookSpecificOutput.{permissionDecision,additionalContext,updatedInput}`/`systemMessage`）；桥接插件只采纳对其方言有意义的子集。在任何路径上都没有消费方的字段不予解析（CC 的 `suppressOutput`——钩子 stdout 在此处从不进入 transcript（文本记录），因此无需抑制；见 [收紧钩子协议契约 Agent Note](../simplification/2026-07-04-tighten-hook-protocol-contract.md)）。
 - **合并** — `mergeHookOutputs(outputs)`，将多个匹配钩子的输出折叠为一个最严格的 `MergedHookOutcome`：权限优先级 **deny > ask > allow**，halt 在首个 `continue:false` 时粘滞，阻止原因以 `\n\n` 拼接，context/system-messages 按序累积。
@@ -29,4 +29,4 @@ Status: implemented
 
 ## 后果
 
-每个桥接插件解析配置、构建方言 payload、调用共享的 runner 与合并逻辑、映射 decision、追加 `hook/*`。协议测试覆盖每种 matcher 模式、exit-code 与编解码器字段、runner 管道、合并优先级和审计辅助函数，逐文件 100% 覆盖率；桥接插件测试验证库的真实加载路径。`updatedInput` 已解析但仅记录日志并发出警告，直到 [input-rewrite 提案](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)落地。
+每个桥接插件以原子方式解析配置、构建方言 payload、调用共享的 runner 与合并逻辑、映射 decision、追加 `hook/*`。协议测试覆盖每种 matcher 模式与诊断、exit-code 与编解码器字段、runner 管道、合并优先级和审计辅助函数，逐文件 100% 覆盖率；桥接插件测试验证库的加载路径并锁定精确警告。无密钥 ACP 快照通过真实 Loader/app 路径启动两个桥接插件，在非法 matcher 之前放置一个合法的拦截 group，然后证明请求仍到达 replay 模型且没有持久化任何 `hook/*` 行，从而避免手工挂载 Context 掩盖部分注册。`updatedInput` 已解析但仅记录日志并发出警告，直到 [input-rewrite 提案](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)落地。
diff --git a/examples/acp-agent/tests/acp.snapshot.ts b/examples/acp-agent/tests/acp.snapshot.ts
index cfb5b10927..46de94806e 100644
--- a/examples/acp-agent/tests/acp.snapshot.ts
+++ b/examples/acp-agent/tests/acp.snapshot.ts
@@ -212,10 +212,16 @@ const SCENARIOS: Scenario[] = [
     headerClass: 'advanced',
     configPath: ADVANCED_CONFIG,
   },
-  // Prompt-submit blocks are authored keylessly. Admission rejects before a
-  // turn opens, so only the ACP stop reason is observable and no log is harvested.
+  // Prompt-submit blocks are authored keylessly with malformed matcher fields,
+  // which these matcherless events must ignore. Admission rejects before a turn
+  // opens, so only the ACP stop reason is observable and no log is harvested.
   { name: 'hook-cc-promptsubmit-block', hasModelTurn: false, recorded: false },
   { name: 'hook-codex-promptsubmit-block', hasModelTurn: false, recorded: false },
+  // Each invalid matcher follows a runnable prompt blocker. Reaching the replay
+  // model without any hook audit rows proves config loading is atomic through
+  // the real Loader/app path, rather than retaining the earlier valid group.
+  { name: 'hook-cc-invalid-matcher', hasModelTurn: true, recorded: false },
+  { name: 'hook-codex-invalid-matcher', hasModelTurn: true, recorded: false },
   // The mid-turn seams fire during a real model turn, so each is recorded with its hook active
   // (the model's reaction to a deny/block/force-continue is part of the captured transcript).
   // SessionStart/SubagentStart are excluded because detached injection races log
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/input.json b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/input.json
new file mode 100644
index 0000000000..5fe0259a4e
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/input.json
@@ -0,0 +1,7 @@
+{
+  "steps": [
+    { "op": "initialize" },
+    { "op": "newSession" },
+    { "op": "prompt", "text": "Reply with exactly the word: PONG. Do not use any tools." }
+  ]
+}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl
new file mode 100644
index 0000000000..32b1461b7c
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl
@@ -0,0 +1,18 @@
+{"type":"session","version":0,"id":"539aa64c-7f37-40ff-abd8-ed45b717be1b","createdAt":1783600629539,"cwd":"{{cwd}}","delegationDepth":0}
+{"type":"turn/start","seq":0,"time":1783600629541,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
+{"type":"user/message","seq":1,"time":1783600629541,"data":{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"5a36df87-da8e-480d-8e0f-61cd2b93bbb8"},"surfaceOp":"append"}
+{"type":"session/title","seq":2,"time":1783600629541,"data":{"title":"Reply with exactly the word:","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"step/start","seq":3,"time":1783600629542,"data":{"turn":1,"step":1}}
+{"type":"request/header","seq":4,"time":1783600629542,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"assistant/chunk","seq":5,"time":1783600630819,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","seq0":6,"time0":1783600630820,"data":{"turn":1,"step":1,"index":0,"dt":[2,30,0,0,0,33,1,40,0,0,0,0,0,18,0,36,0,0,0],"texts":["The"," user"," wants"," me"," to"," reply"," with"," exactly"," the"," word"," \"","P","ONG","\""," and"," not"," use"," any"," tools","."]}}
+{"type":"assistant/chunk","seq":26,"time":1783600630980,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"assistant/chunk","seq":27,"time":1783600630980,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":1,"text":"P"}}}
+{"type":"assistant/chunk","seq":28,"time":1783600631006,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":1,"text":"ONG"}}}
+{"type":"assistant/chunk","seq":29,"time":1783600631008,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."}}}}
+{"type":"assistant/chunk","seq":30,"time":1783600631009,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PONG"}}}}
+{"type":"assistant/chunk","seq":31,"time":1783600631009,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}}}}
+{"type":"assistant/chunk","seq":32,"time":1783600631009,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":33,"time":1783600631011,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."},{"type":"text","text":"PONG"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"7452a358-8038-4583-9ceb-66564f665bfb"},"usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],"surfaceOp":"append"}
+{"type":"step/end","seq":34,"time":1783600631011,"data":{"turn":1,"step":1}}
+{"type":"turn/end","seq":35,"time":1783600631011,"data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/stdout.expected.jsonl
new file mode 100644
index 0000000000..acfccdd778
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/stdout.expected.jsonl
@@ -0,0 +1,4 @@
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PONG"}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/workspace/hooks.json b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/workspace/hooks.json
new file mode 100644
index 0000000000..ddb3eb4659
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/workspace/hooks.json
@@ -0,0 +1,19 @@
+{
+  "hooks": {
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          { "type": "command", "command": "echo 'must not run' >&2; exit 2" }
+        ]
+      }
+    ],
+    "PreToolUse": [
+      {
+        "matcher": "[",
+        "hooks": [
+          { "type": "command", "command": "exit 2" }
+        ]
+      }
+    ]
+  }
+}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/workspace/hooks.json b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/workspace/hooks.json
index ee3da88fb1..d4ef9cc633 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/workspace/hooks.json
+++ b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/workspace/hooks.json
@@ -2,6 +2,7 @@
   "hooks": {
     "UserPromptSubmit": [
       {
+        "matcher": "[",
         "hooks": [
           { "type": "command", "command": "echo 'blocked by policy hook' >&2; exit 2" }
         ]
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/input.json b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/input.json
new file mode 100644
index 0000000000..5fe0259a4e
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/input.json
@@ -0,0 +1,7 @@
+{
+  "steps": [
+    { "op": "initialize" },
+    { "op": "newSession" },
+    { "op": "prompt", "text": "Reply with exactly the word: PONG. Do not use any tools." }
+  ]
+}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
new file mode 100644
index 0000000000..f4374b94a3
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
@@ -0,0 +1,18 @@
+{"type":"session","version":0,"id":"539aa64c-7f37-40ff-abd8-ed45b717be1b","createdAt":1783600629539,"cwd":"{{cwd}}","delegationDepth":0}
+{"type":"turn/start","seq":0,"time":1783600629541,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
+{"type":"user/message","seq":1,"time":1783600629541,"data":{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"56715824-b0da-4a73-8d6c-0caa590995e6"},"surfaceOp":"append"}
+{"type":"session/title","seq":2,"time":1783600629541,"data":{"title":"Reply with exactly the word:","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"step/start","seq":3,"time":1783600629542,"data":{"turn":1,"step":1}}
+{"type":"request/header","seq":4,"time":1783600629542,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"assistant/chunk","seq":5,"time":1783600630819,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","seq0":6,"time0":1783600630820,"data":{"turn":1,"step":1,"index":0,"dt":[2,30,0,0,0,33,1,40,0,0,0,0,0,18,0,36,0,0,0],"texts":["The"," user"," wants"," me"," to"," reply"," with"," exactly"," the"," word"," \"","P","ONG","\""," and"," not"," use"," any"," tools","."]}}
+{"type":"assistant/chunk","seq":26,"time":1783600630980,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"assistant/chunk","seq":27,"time":1783600630980,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":1,"text":"P"}}}
+{"type":"assistant/chunk","seq":28,"time":1783600631006,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":1,"text":"ONG"}}}
+{"type":"assistant/chunk","seq":29,"time":1783600631008,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."}}}}
+{"type":"assistant/chunk","seq":30,"time":1783600631009,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PONG"}}}}
+{"type":"assistant/chunk","seq":31,"time":1783600631009,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}}}}
+{"type":"assistant/chunk","seq":32,"time":1783600631009,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":33,"time":1783600631011,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."},{"type":"text","text":"PONG"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"2d9d88d1-b684-491f-9d5f-73721b7fd5ed"},"usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],"surfaceOp":"append"}
+{"type":"step/end","seq":34,"time":1783600631011,"data":{"turn":1,"step":1}}
+{"type":"turn/end","seq":35,"time":1783600631011,"data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/stdout.expected.jsonl
new file mode 100644
index 0000000000..acfccdd778
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/stdout.expected.jsonl
@@ -0,0 +1,4 @@
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PONG"}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/workspace/codex-hooks.json b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/workspace/codex-hooks.json
new file mode 100644
index 0000000000..ddb3eb4659
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/workspace/codex-hooks.json
@@ -0,0 +1,19 @@
+{
+  "hooks": {
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          { "type": "command", "command": "echo 'must not run' >&2; exit 2" }
+        ]
+      }
+    ],
+    "PreToolUse": [
+      {
+        "matcher": "[",
+        "hooks": [
+          { "type": "command", "command": "exit 2" }
+        ]
+      }
+    ]
+  }
+}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/workspace/codex-hooks.json b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/workspace/codex-hooks.json
index 84bc6f37d0..f3fc9de501 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/workspace/codex-hooks.json
+++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/workspace/codex-hooks.json
@@ -2,6 +2,7 @@
   "hooks": {
     "UserPromptSubmit": [
       {
+        "matcher": "[",
         "hooks": [
           { "type": "command", "command": "echo 'blocked by codex policy hook' >&2; exit 2" }
         ]
diff --git a/packages/hooks/README.i18n.yaml b/packages/hooks/README.i18n.yaml
index 80f55791c1..165722ec0d 100644
--- a/packages/hooks/README.i18n.yaml
+++ b/packages/hooks/README.i18n.yaml
@@ -3,4 +3,4 @@
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/hooks/README.md
 README.md: 23478fb5e9b813a3370ce465104b1f9db8b0a26a
-README.zh.md: 41024a8bd268550aa07401fd8b21c74db0914796
+README.zh.md: 741300a9a390a8f254c01733e5326be84541a78d
diff --git a/packages/hooks/README.zh.md b/packages/hooks/README.zh.md
index 41024a8bd2..741300a9a3 100644
--- a/packages/hooks/README.zh.md
+++ b/packages/hooks/README.zh.md
@@ -10,4 +10,4 @@ hooks 子系统让用户可以像使用 Claude Code 和 Codex 一样，在 agent
 | `hooks-claude/` | Claude Code `hooks.json`／settings 的桥接 | 插件 |
 | `hooks-codex/` | Codex `hooks.json` 的桥接 | 插件 |
 
-Codex 有意重新实现 Claude Code 协议的一个*子集*（`hooks.json` 结构相同、5 个事件而非 CC 的众多事件、仅命令、仅正则表达式 matcher、没有 env／替换），因此 `hook-protocol` 负责真正相同的原语，每个桥接只负责不同部分（逐事件 stdin 载荷、env，以及把 hook 的中性结果映射到 harness 类型化 Decision 的方式）。参见 [hook-protocol/README.md](hook-protocol/README.md)。
+Codex 有意重新实现 Claude Code 协议的一个*子集*（`hooks.json` 结构相同、5 个事件而非 CC 的众多事件、仅命令、仅使用正则的 matcher、没有 env／替换），因此 `hook-protocol` 负责真正相同的原语，每个桥接只负责不同部分（逐事件 stdin 载荷、env，以及把 hook 的中性结果映射到 harness 类型化 Decision 的方式）。参见 [hook-protocol/README.md](hook-protocol/README.md)。
diff --git a/packages/hooks/hook-protocol/README.i18n.yaml b/packages/hooks/hook-protocol/README.i18n.yaml
index 65faa23b75..deed052066 100644
--- a/packages/hooks/hook-protocol/README.i18n.yaml
+++ b/packages/hooks/hook-protocol/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/hooks/hook-protocol/README.md
-README.md: 10cfcdcbf819f318f2ccaf412ae04bba60812397
-README.zh.md: 9862d4f332e0e82fb6479fcadf9376403fb9bef8
+README.md: 8cf4b95c95d43b8fbc27bbdcaf727dabf7d96805
+README.zh.md: 15a537b67677a401ab434a3e73af1973030780c0
diff --git a/packages/hooks/hook-protocol/README.md b/packages/hooks/hook-protocol/README.md
index 10cfcdcbf8..8cf4b95c95 100644
--- a/packages/hooks/hook-protocol/README.md
+++ b/packages/hooks/hook-protocol/README.md
@@ -10,7 +10,7 @@ Why a shared lib at all: Codex deliberately reimplements a *subset* of the Claud
 
 | Concern | Here (`dsh-hook-protocol`) | The bridge (`dsh-hooks-claude` / `-codex`) |
 |---|---|---|
-| Matcher test | `matchesMatcher(pattern, query, mode)` — literal-or-regex by `mode` | picks its `mode` (`claude` = literal-or-regex, `codex` = always regex) |
+| Matcher validation + test | `matcherDiagnostic(pattern, mode)` for parse-time diagnostics; `matchesMatcher(pattern, query, mode)` for contained runtime matching | picks its `mode` (`claude` = literal-or-regex, `codex` = always regex) and rejects a config group carrying a diagnostic |
 | Run a hook | `runHook(bash, hook, opts, now)` — stdin payload + env via `ctx.bash`, decode | builds the per-event stdin **payload** + the dialect's **env** |
 | Decode output | `parseHookOutput(exit, stdout, stderr)` → neutral `HookOutput` | maps the neutral `HookOutput` onto a seam-specific typed Decision |
 | Merge N hooks | `mergeHookOutputs(outputs)` → most-restrictive `MergedHookOutcome` | — |
@@ -19,7 +19,7 @@ Why a shared lib at all: Codex deliberately reimplements a *subset* of the Claud
 
 ## Primitives
 
-- **`matchesMatcher(matcher, query, mode)`** — match-all on absent/`''`/`'*'`; `claude` mode treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` mode is always an unanchored regex. An invalid regex matches nothing (never throws).
+- **`matcherDiagnostic(matcher, mode)` / `matchesMatcher(matcher, query, mode)`** — match-all on absent/`''`/`'*'`; `claude` mode treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` mode is always an unanchored regex. Bridge parsers discard matcher fields for events without matcher subjects, then use `matcherDiagnostic` to reject an invalid consumed regex with a stable diagnostic before registering any hooks. The runtime predicate still contains an invalid pattern as a non-match, so a direct library caller cannot throw into the agent loop.
 - **`runHook(bash, hook, options, now)`** — require and forward the caller-owned `options.signal`, serialize `options.payload` to the hook's stdin (with a trailing newline iff `options.trailingNewline`), merge `options.env` after the executor's credential scrub (the `dsh-bash` trusted-plugin surface), honor the hook's `timeoutSec` (else `options.defaultTimeoutMs` — the bridge owns the default, its config defaulting to the lib's `DEFAULT_HOOK_TIMEOUT_MS` 10-minute reference), and decode the result (threading `options.expectedEventName` to the codec). Cancellation therefore reaches the executor's process-group kill and join boundary. Never throws: an executor rejection (infra fault) becomes a `HookOutput` with `exitCode: undefined` (a non-blocking error). `now` is injected for testable durations.
 - **`parseHookOutput(exitCode, stdout, stderr, expectedEventName?)`** decodes exit status and structured stdout. Exit 2 blocks with stderr; other failures are non-blocking. A matching hook-specific permission decision overrides the legacy top-level decision; mismatched or missing event discriminators suppress only event-specific fields. Top-level fields remain event-agnostic, and successful non-JSON output is left to the bridge.
 - **`mergeHookOutputs(outputs)`** — fold the results of every hook that matched one point: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined with `\n\n`, `additionalContext`/`systemMessages` accumulated in order.
@@ -42,4 +42,3 @@ No direct invalidation; the named consumer owns any request-prefix changes.
 ## Known Limitations and Deferred Work
 
 - **`HookOutput.updatedInput` is parsed but not honored** — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite Agent Note](../../../.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)); a bridge logs + warns when a hook sets it. See `src/types.ts` for the full contracts.
-- **An invalid matcher regex matches nothing, silently** — `matchesMatcher` never throws; surfacing the error needs a diagnostic-returning variant or parse-time validation (`TODO(matcher-diagnostics)`).
diff --git a/packages/hooks/hook-protocol/README.zh.md b/packages/hooks/hook-protocol/README.zh.md
index 9862d4f332..15a537b676 100644
--- a/packages/hooks/hook-protocol/README.zh.md
+++ b/packages/hooks/hook-protocol/README.zh.md
@@ -10,7 +10,7 @@ Claude Code／Codex hook 协议格式（wire format）的**共享核心**。它
 
 | 关注点 | 此处（`dsh-hook-protocol`） | 桥接（`dsh-hooks-claude` / `-codex`） |
 |---|---|---|
-| Matcher 测试 | `matchesMatcher(pattern, query, mode)`：根据 `mode` 使用字面匹配或正则匹配 | 选择自身 `mode`（`claude` = 字面或正则，`codex` = 始终使用正则） |
+| Matcher 校验 + 测试 | `matcherDiagnostic(pattern, mode)` 用于解析时诊断；`matchesMatcher(pattern, query, mode)` 用于隔离的运行时匹配 | 选择自身的 `mode`（`claude` = 字面量或正则，`codex` = 始终使用正则），并拒绝带有诊断的配置组 |
 | 运行 hook | `runHook(bash, hook, opts, now)`：通过 `ctx.bash` 提供 stdin payload + env，再解码 | 构造每个事件的 stdin **payload** + 该方言的 **env** |
 | 解码输出 | `parseHookOutput(exit, stdout, stderr)` → 中性 `HookOutput` | 将中性 `HookOutput` 映射到 seam 特定的类型化 Decision |
 | 合并 N 个 hook | `mergeHookOutputs(outputs)` → 最严格的 `MergedHookOutcome` | （无） |
@@ -19,7 +19,7 @@ Claude Code／Codex hook 协议格式（wire format）的**共享核心**。它
 
 ## 原语
 
-- **`matchesMatcher(matcher, query, mode)`**：缺失、`''` 或 `'*'` 时匹配全部；`claude` 模式将纯 `[A-Za-z0-9_|]+` pattern 视为字面值（pipe = 精确匹配交替），其他 pattern 视为正则；`codex` 模式始终使用未锚定正则。无效正则不匹配任何内容（绝不抛出异常）。
+- **`matcherDiagnostic(matcher, mode)` / `matchesMatcher(matcher, query, mode)`**：缺失、`''` 或 `'*'` 时匹配全部；`claude` mode 将纯 `[A-Za-z0-9_|]+` pattern 视为字面量（管道符 = 精确匹配多选），其他 pattern 视为正则；`codex` mode 始终使用未锚定正则。桥接解析器会丢弃没有 matcher 匹配对象的事件所带字段，再用 `matcherDiagnostic` 拒绝事件实际使用的无效正则，并在注册任何钩子之前给出稳定诊断。运行时谓词仍会将无效 pattern 隔离为不匹配，因此直接调用本库不会向 agent loop（智能体循环）抛异常。
 - **`runHook(bash, hook, options, now)`**：要求并转发调用方拥有的 `options.signal`，将 `options.payload` 序列化到 hook stdin（当且仅当 `options.trailingNewline` 时添加尾随换行符），在执行器凭证清理后合并 `options.env`（`dsh-bash` 受信任插件接口），遵循 hook 的 `timeoutSec`（否则使用 `options.defaultTimeoutMs`；默认值属于桥接，其配置默认为 lib 的 `DEFAULT_HOOK_TIMEOUT_MS` 10 分钟参考值），再解码结果（将 `options.expectedEventName` 传递给 codec）。因此取消会到达执行器的进程组终止与 join 边界。它绝不抛出异常：执行器拒绝（基础设施故障）会变为 `HookOutput`，其 `exitCode: undefined`（非阻塞错误）。`now` 会被注入，以便测试持续时间。
 - **`parseHookOutput(exitCode, stdout, stderr, expectedEventName?)`** 解码退出状态与结构化 stdout。退出码为 2 时，会以 stderr 内容阻止执行；其他失败不阻塞。匹配的 hook 特定权限决策会覆盖遗留顶层决策；事件判别字段不匹配或缺失只会抑制事件特定字段。顶层字段仍与事件无关，成功但非 JSON 的输出会留给桥接处理。
 - **`mergeHookOutputs(outputs)`**：折叠在一个点上匹配的每个 hook 结果：权限优先级为 **deny > ask > allow**，从首个 `continue:false` 起，halt 状态保持不变，阻塞原因用 `\n\n` 连接，`additionalContext`／`systemMessages` 按顺序累积。
@@ -29,7 +29,7 @@ Claude Code／Codex hook 协议格式（wire format）的**共享核心**。它
 
 通过 declaration merging 合并到 `SessionEventMap`（仅日志，与 `compact/*` 相同；不是 `SurfaceEventType`，没有 `surfaceOp`）：`hook/invoked`（hook 命令已运行）与 `hook/result`（其结果，按 `handlerId` 配对，决策规则由 `appendHookResult` 负责）。Payload 与每事件 JSDoc 位于生成的 [持久化日志事件目录](../../../docs/persistence-catalog.md)；`stderrSummary` 会截断到记录的 `stderrSummaryMaxChars`（桥接配置，参考默认值 `DEFAULT_STDERR_SUMMARY_MAX_CHARS` = 500；为空时省略）。
 
-Hook 溯源记录必须位于一个尚未结束的轮次内。轮次中的点（`PreToolUse`／`PostToolUse`／`Stop`）按构造满足这条由所有者定义的关系。`SessionStart` 与轮次前的 `UserPromptSubmit` 准入 seam 没有 `hook/*` 记录；获准的上下文改由其带来源的 `user/message` 作为证据，详见 hooks Agent Note（agent 决策记录）。
+Hook 溯源记录必须位于一个尚未结束的轮次内。轮次中的点（`PreToolUse`／`PostToolUse`／`Stop`）按构造满足这条由所有者定义的关系。`SessionStart` 与轮次前的 `UserPromptSubmit` 准入 seam 没有 `hook/*` 记录；获准的上下文改由其带来源的 `user/message` 作为证据，详见 hooks Agent Note。
 
 ## 模型体验
 
@@ -42,4 +42,3 @@ Hook 溯源记录必须位于一个尚未结束的轮次内。轮次中的点（
 ## 已知限制与暂缓事项
 
 - **`HookOutput.updatedInput` 会被解析但不会应用**：输入改写是已暂缓的一致性设计问题（见 [pre-tool-input-rewrite Agent Note](../../../.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)）；当 hook 设置它时，桥接会记录 + 警告。完整契约见 `src/types.ts`。
-- **无效 matcher 正则会静默地不匹配任何内容**：`matchesMatcher` 绝不抛出异常；显示该错误需要返回诊断的变体或解析时验证（`TODO(matcher-diagnostics)`）。
diff --git a/packages/hooks/hook-protocol/src/index.ts b/packages/hooks/hook-protocol/src/index.ts
index e342665057..d67746f824 100644
--- a/packages/hooks/hook-protocol/src/index.ts
+++ b/packages/hooks/hook-protocol/src/index.ts
@@ -13,7 +13,7 @@ export type {
   MatcherGroup,
   MatcherMode,
 } from './types.ts'
-export { matchesMatcher } from './matcher.ts'
+export { matcherDiagnostic, matchesMatcher } from './matcher.ts'
 export { parseHookOutput } from './codec.ts'
 export { DEFAULT_HOOK_TIMEOUT_MS, runHook } from './runner.ts'
 export type { RunHookOptions, RunHookResult } from './runner.ts'
diff --git a/packages/hooks/hook-protocol/src/matcher.ts b/packages/hooks/hook-protocol/src/matcher.ts
index 036954a59c..9c5606a975 100644
--- a/packages/hooks/hook-protocol/src/matcher.ts
+++ b/packages/hooks/hook-protocol/src/matcher.ts
@@ -2,7 +2,8 @@
  * Matcher shared by both hook dialects. Claude treats alphanumeric/underscore/
  * pipe patterns as literal alternatives and other patterns as regex; Codex
  * treats every non-empty pattern as an unanchored regex. Missing, empty, and
- * `*` match all; invalid regexes silently match nothing.
+ * `*` match all. Runtime matching contains invalid regexes as non-matches;
+ * config parsers use {@link matcherDiagnostic} to reject them with a diagnostic.
  * @module @deepseek-ai/dsh-hook-protocol/matcher
  */
 
@@ -16,10 +17,37 @@ function isMatchAll(matcher: string | undefined): boolean {
 /** A Claude-literal pattern is purely word chars + `|` (the regex-vs-literal discriminator). */
 const CLAUDE_LITERAL = /^[A-Za-z0-9_|]+$/
 
+/** Compile an unanchored matcher regex; invalid patterns return `undefined`. */
+function compileRegex(pattern: string): RegExp | undefined {
+  try {
+    return new RegExp(pattern)
+  } catch (_syntaxError) {
+    // RegExp construction is the try's only operation, so malformed pattern
+    // syntax is the only expected failure.
+    return undefined
+  }
+}
+
+/**
+ * Validate one matcher before a bridge accepts its config group.
+ * @param matcher - configured pattern; match-all sentinels are valid.
+ * @param mode - dialect deciding whether a word-and-pipe pattern is literal.
+ * @returns `undefined` for a valid matcher, otherwise a stable diagnostic.
+ */
+export function matcherDiagnostic(matcher: string | undefined, mode: MatcherMode): string | undefined {
+  if (isMatchAll(matcher)) return undefined
+  const pattern = matcher as string
+  if (mode === 'claude' && CLAUDE_LITERAL.test(pattern)) return undefined
+  return compileRegex(pattern) === undefined
+    ? `invalid ${mode} regex matcher ${JSON.stringify(pattern)}`
+    : undefined
+}
+
 /**
  * Whether `matcher` selects `query` under the given dialect. Claude literal
  * patterns exact-match pipe-separated alternatives; all other patterns are
- * unanchored regexes. Invalid regexes return `false` rather than throwing.
+ * unanchored regexes. Invalid regexes return `false` rather than throwing;
+ * bridge config parsers surface them through {@link matcherDiagnostic} before use.
  * @param matcher - the configured pattern; absent/empty/`'*'` are the match-all sentinels.
  * @param query - the candidate value (a tool name, a session source, …).
  * @param mode - the dialect deciding literal-vs-regex interpretation of the pattern.
@@ -33,13 +61,5 @@ export function matchesMatcher(matcher: string | undefined, query: string, mode:
   if (mode === 'claude' && CLAUDE_LITERAL.test(pattern)) {
     return pattern.split('|').includes(query)
   }
-  try {
-    return new RegExp(pattern).test(query)
-  } catch {
-    // Invalid regex: a broken matcher selects nothing rather than throwing into
-    // the agent loop. This is silent — callers get `false`, indistinguishable
-    // from a genuine non-match, so a typo'd pattern quietly disables the matcher.
-    // Surfacing it needs a diagnostic-returning variant (TODO(matcher-diagnostics)).
-    return false
-  }
+  return compileRegex(pattern)?.test(query) ?? false
 }
diff --git a/packages/hooks/hook-protocol/tests/matcher.spec.ts b/packages/hooks/hook-protocol/tests/matcher.spec.ts
index 37e2acb137..a1f794aa28 100644
--- a/packages/hooks/hook-protocol/tests/matcher.spec.ts
+++ b/packages/hooks/hook-protocol/tests/matcher.spec.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { matchesMatcher } from '@deepseek-ai/dsh-hook-protocol'
+import { matcherDiagnostic, matchesMatcher } from '@deepseek-ai/dsh-hook-protocol'
 
 describe('matchesMatcher — match-all sentinels (both dialects)', () => {
   for (const mode of ['claude', 'codex'] as const) {
@@ -56,3 +56,19 @@ describe('matchesMatcher — invalid regex is a non-match (never throws)', () =>
     expect(matchesMatcher('[', 'x', 'codex')).toBe(false)
   })
 })
+
+describe('matcherDiagnostic — parse-time diagnostics', () => {
+  it('accepts match-all sentinels, Claude literals, and valid regexes', () => {
+    expect(matcherDiagnostic(undefined, 'claude')).toBeUndefined()
+    expect(matcherDiagnostic('', 'codex')).toBeUndefined()
+    expect(matcherDiagnostic('*', 'codex')).toBeUndefined()
+    expect(matcherDiagnostic('Edit|Write', 'claude')).toBeUndefined()
+    expect(matcherDiagnostic('^Bash$', 'claude')).toBeUndefined()
+    expect(matcherDiagnostic('Edit|Write', 'codex')).toBeUndefined()
+  })
+
+  it('returns a stable diagnostic for invalid regexes in either dialect', () => {
+    expect(matcherDiagnostic('(', 'claude')).toBe('invalid claude regex matcher "("')
+    expect(matcherDiagnostic('[', 'codex')).toBe('invalid codex regex matcher "["')
+  })
+})
diff --git a/packages/hooks/hooks-claude/README.i18n.yaml b/packages/hooks/hooks-claude/README.i18n.yaml
index 1eaa331832..ed15dbf7a6 100644
--- a/packages/hooks/hooks-claude/README.i18n.yaml
+++ b/packages/hooks/hooks-claude/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/hooks/hooks-claude/README.md
-README.md: 24259c24ea35cd450f8ea27ca2cca423ed4406bd
-README.zh.md: 0a7afc20eba02d59d293124936cb81aeba6d3f0f
+README.md: 61c2d152dacdbec31bca015b94b9f2ac6d24c3aa
+README.zh.md: 38509ab6e6f72bb62a6bed064257603f728812cb
diff --git a/packages/hooks/hooks-claude/README.md b/packages/hooks/hooks-claude/README.md
index 24259c24ea..61c2d152da 100644
--- a/packages/hooks/hooks-claude/README.md
+++ b/packages/hooks/hooks-claude/README.md
@@ -28,7 +28,7 @@ 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 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 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 — including an invalid regex matcher on an event that consumes matchers, reported with its pattern and event — and 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.
 
@@ -86,7 +86,7 @@ A blocked prompt sends no request and invalidates nothing. Denial, feedback, and
 
 ## 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).
+- **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 ignored before group parsing, so an unsupported event cannot invalidate or register hooks. 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 Agent Note](../../../.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)).
diff --git a/packages/hooks/hooks-claude/README.zh.md b/packages/hooks/hooks-claude/README.zh.md
index 0a7afc20eb..38509ab6e6 100644
--- a/packages/hooks/hooks-claude/README.zh.md
+++ b/packages/hooks/hooks-claude/README.zh.md
@@ -28,7 +28,7 @@ const config: Config = {
     projectDir: .
 ```
 
-配置只在加载时解析**一次**。`configPath` 是**进程级**配置：相对路径在加载时根据进程启动 cwd 解析，因此一份配置应用于整个进程。尚未进行每会话（`session/new.cwd`）配置发现（`TODO(per-session-hook-config)`）。读取／解析失败会被隔离处理：桥接记录警告且不注册任何内容，而不是使启动崩溃（路径拼写错误不应使 agent（智能体）停止）。只运行 shell 形式 `type: 'command'` hook；`http`／`mcp_tool`／`prompt`／`agent` hook 会被解析并跳过，同时记录警告。没有每 hook `timeout` 的 hook 会使用协议参考默认值 `DEFAULT_HOOK_TIMEOUT_MS`（来自 `dsh-hook-protocol`，10 分钟，即 CC 默认值）。
+配置只在加载时解析**一次**。`configPath` 是**进程级**配置：相对路径在加载时根据进程启动 cwd 解析，因此一份配置应用于整个进程。尚未进行每会话（`session/new.cwd`）配置发现（`TODO(per-session-hook-config)`）。读取／解析失败会被隔离处理，其中包括实际消费 matcher 的事件所带的无效 matcher 正则（会报告其 pattern 与事件）：桥接记录警告且不注册任何内容，而不是使启动崩溃（路径拼写错误不应使 agent（智能体）停止）。只运行 shell 形式 `type: 'command'` hook；`http`／`mcp_tool`／`prompt`／`agent` hook 会被解析并跳过，同时记录警告。没有每 hook `timeout` 的 hook 会使用协议参考默认值 `DEFAULT_HOOK_TIMEOUT_MS`（来自 `dsh-hook-protocol`，10 分钟，即 CC 默认值）。
 
 hook **本身**会在 agent 的会话工作区中运行：对 agent scope 点，桥接会将会话 `cwd`（`session/new.cwd`）作为 hook 进程工作目录，因此 hook 的 `pwd`／相对路径／marker 作用于用户项目树，而非服务器启动目录。
 
@@ -86,7 +86,7 @@ hook 不返回上下文时没有成本。Hook 文本取决于数据，会被记
 
 ## 已知限制与暂缓事项
 
-- **不支持的 hook 事件（Claude Code 当前 30 项中的 23 项）：** `Setup`、`InstructionsLoaded`、`UserPromptExpansion`、`MessageDisplay`、`PermissionRequest`、`PostToolUseFailure`、`PostToolBatch`、`PermissionDenied`、`Notification`、`TaskCreated`、`TaskCompleted`、`StopFailure`、`TeammateIdle`、`ConfigChange`、`CwdChanged`、`FileChanged`、`WorktreeCreate`、`WorktreeRemove`、`PreCompact`、`PostCompact`、`SessionEnd`、`Elicitation` 和 `ElicitationResult`。这些事件的配置会被解析，但绝不分派。比较基线是 Claude Code [官方 hook 事件参考](https://code.claude.com/docs/en/hooks#hook-events)。
+- **不支持的 hook 事件（Claude Code 当前 30 项中的 23 项）：** `Setup`、`InstructionsLoaded`、`UserPromptExpansion`、`MessageDisplay`、`PermissionRequest`、`PostToolUseFailure`、`PostToolBatch`、`PermissionDenied`、`Notification`、`TaskCreated`、`TaskCompleted`、`StopFailure`、`TeammateIdle`、`ConfigChange`、`CwdChanged`、`FileChanged`、`WorktreeCreate`、`WorktreeRemove`、`PreCompact`、`PostCompact`、`SessionEnd`、`Elicitation` 和 `ElicitationResult`。这些事件的配置会在配置组解析前被忽略，因此不支持的事件既不会使配置失效，也不会注册 hook。比较基线是 Claude Code [官方 hook 事件参考](https://code.claude.com/docs/en/hooks#hook-events)。
 - **`SessionStart` 只支持部分功能：** 会消费 JSON `additionalContext`，但不支持纯 stdout 上下文、`initialUserMessage`、`sessionTitle`、`watchPaths`、`reloadSkills` 与 `CLAUDE_ENV_FILE`。hook 脱离运行，因此上下文可能错过第一个请求（`TODO(session-start-gating)`），payload 会省略 `model`、`agent_type` 和 `session_title` 等当前可选字段。
 - **`UserPromptSubmit` 只支持部分功能：** 支持阻塞与 JSON `additionalContext`，但不支持纯 stdout 上下文、`sessionTitle` 和 `suppressOriginalPrompt`。除非被覆盖，否则桥接还会使用自身 600 秒默认值，而非 Claude Code 的事件特定 30 秒 command 超时。
 - **`PreToolUse` 只支持部分功能：** `deny` 与 `ask` 决策可用；`allow` 不会预审批，不支持 `defer`，`additionalContext` 会被忽略，`updatedInput` 会被记录 + 警告但不应用（见 [pre-tool-input-rewrite Agent Note](../../../.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)）。
diff --git a/packages/hooks/hooks-claude/src/config.ts b/packages/hooks/hooks-claude/src/config.ts
index 3797d4e56f..2650e940c2 100644
--- a/packages/hooks/hooks-claude/src/config.ts
+++ b/packages/hooks/hooks-claude/src/config.ts
@@ -6,7 +6,17 @@
  * @module @deepseek-ai/dsh-hooks-claude/config
  */
 
-import type { MatcherGroup } from '@deepseek-ai/dsh-hook-protocol'
+import { matcherDiagnostic, type MatcherGroup } from '@deepseek-ai/dsh-hook-protocol'
+
+const CLAUDE_EVENTS = [
+  'SessionStart',
+  'UserPromptSubmit',
+  'PreToolUse',
+  'PostToolUse',
+  'Stop',
+  'SubagentStart',
+  'SubagentStop',
+] as const
 
 /** A parsed CC config: event name → its matcher groups (command hooks only). */
 export type ClaudeHookConfig = Record<string, MatcherGroup[]>
@@ -53,8 +63,11 @@ export function substituteCommand(command: string, vars: SubstitutionVars): stri
 
 /**
  * Parse either a settings `hooks` value or a bare `hooks.json` event map. Malformed entries are
- * ignored rather than failing boot; non-command hooks are returned in `skipped`, and substitutions
- * are applied to every surviving command.
+ * ignored rather than failing boot; unsupported events are ignored before their groups are parsed,
+ * non-command hooks are returned in `skipped`, and substitutions are applied to every surviving
+ * command. Matcher fields on UserPromptSubmit and Stop are discarded because those events have no
+ * matcher subject. A matcher-bearing supported runnable group with an invalid regex throws a
+ * `SyntaxError`, allowing the bridge to reject the complete config before listener registration.
  *
  * @param raw - the parsed JSON config: a settings object with a `hooks` key, or the bare
  *   event map.
@@ -70,7 +83,8 @@ export function parseClaudeConfig(raw: unknown, vars: SubstitutionVars = {}): Pa
   const hooksMap = root ? asObject(root.hooks) ?? root : undefined
   if (!hooksMap) return { config, skipped }
 
-  for (const [event, rawGroups] of Object.entries(hooksMap)) {
+  for (const event of CLAUDE_EVENTS) {
+    const rawGroups = hooksMap[event]
     if (!Array.isArray(rawGroups)) continue
     const groups: MatcherGroup[] = []
     for (const rawGroup of rawGroups) {
@@ -92,8 +106,13 @@ export function parseClaudeConfig(raw: unknown, vars: SubstitutionVars = {}): Pa
         })
       }
       if (commands.length === 0) continue
+      const matcher = event === 'UserPromptSubmit' || event === 'Stop'
+        ? undefined
+        : typeof group.matcher === 'string' ? group.matcher : undefined
+      const diagnostic = matcherDiagnostic(matcher, 'claude')
+      if (diagnostic !== undefined) throw new SyntaxError(`${diagnostic} on event ${JSON.stringify(event)}`)
       groups.push({
-        ...typeof group.matcher === 'string' ? { matcher: group.matcher } : {},
+        ...matcher !== undefined ? { matcher } : {},
         hooks: commands,
       })
     }
diff --git a/packages/hooks/hooks-claude/tests/bridge.spec.ts b/packages/hooks/hooks-claude/tests/bridge.spec.ts
index eca0cb781b..c23625b392 100644
--- a/packages/hooks/hooks-claude/tests/bridge.spec.ts
+++ b/packages/hooks/hooks-claude/tests/bridge.spec.ts
@@ -45,17 +45,22 @@ function writeConfig(hooks: unknown, scripts: Record<string, string> = {}): stri
   return dir
 }
 
-async function harness(configDir: string, adapter: MockAdapter): Promise<Context> {
-  return (await harnessWithFiber(configDir, adapter)).ctx
+async function harness(configDir: string, adapter: MockAdapter, beforeHooks?: (ctx: Context) => void): Promise<Context> {
+  return (await harnessWithFiber(configDir, adapter, beforeHooks)).ctx
 }
 
 /** {@link harness}, also exposing the bridge's fiber for tests that dispose it. */
-async function harnessWithFiber(configDir: string, adapter: MockAdapter): Promise<{ ctx: Context; hooks: Fiber }> {
+async function harnessWithFiber(
+  configDir: string,
+  adapter: MockAdapter,
+  beforeHooks?: (ctx: Context) => void,
+): Promise<{ ctx: Context; hooks: Fiber }> {
   const ctx = new Context()
   await mountAgentLoopTestDependencies(ctx)
   await ctx.plugin(AgentLoop, { agents: [] })
   await ctx.plugin(LocalSubprocessService)
   await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
+  beforeHooks?.(ctx)
   const hooks = await ctx.plugin(HooksClaude, { configPath: join(configDir, 'hooks.json') })
   ctx.llm.registerAdapter(['mock'], adapter)
   return { ctx, hooks }
@@ -85,13 +90,14 @@ async function waitFor(predicate: () => boolean, timeout = 5000, interval = 10):
 
 describe('hooks-claude bridge — UserPromptSubmit', () => {
   it('a UserPromptSubmit hook that exits 2 rejects admission without a turn', async () => {
-    // The UserPromptSubmit hook exits 2 (blocking) with a reason on stderr.
+    // UserPromptSubmit ignores its malformed matcher field, then exit 2 blocks
+    // with the reason on stderr.
     const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-'))
     dirs.push(dir)
     const block = join(dir, 'block.sh')
     writeFileSync(block, '#!/usr/bin/env bash\necho "prompt denied by policy" >&2\nexit 2\n')
     chmodSync(block, 0o755)
-    writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { UserPromptSubmit: [{ hooks: [{ type: 'command', command: block }] }] } }))
+    writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { UserPromptSubmit: [{ matcher: '[', hooks: [{ type: 'command', command: block }] }] } }))
 
     const adapter = new MockAdapter([textResponse('should not run')])
     const ctx = await harness(dir, adapter)
@@ -361,6 +367,42 @@ describe('hooks-claude bridge — load resilience', () => {
     expect(adapter.requests).toHaveLength(1)
   })
 
+  it('an invalid regex matcher is reported and registers no hooks', async () => {
+    const dir = writeConfig({
+      UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'exit 2' }] }],
+      PreToolUse: [{ matcher: '(', hooks: [{ type: 'command', command: 'exit 2' }] }],
+    })
+    const adapter = new MockAdapter([textResponse('fine')])
+    const warn = vi.fn()
+    const ctx = await harness(dir, adapter, (ctx) => { ctx.logger.warn = warn as never })
+    const agent = ctx.agentLoop.create(SessionId('invalid-claude-matcher'), { provider: 'mock', model: 'mock' })
+    agent.followup(createUserMessage({ content: [{ type: 'text', text: 'go' }], source: { kind: 'user' } }))
+    await waitForIdle(ctx, agent)
+    expect(adapter.requests).toHaveLength(1)
+    expect(events(agent).some(event => event.type === 'hook/invoked')).toBe(false)
+
+    expect(warn).toHaveBeenCalledWith(expect.stringContaining(
+      'invalid claude regex matcher "(" on event "PreToolUse"',
+    ))
+  })
+
+  it('an invalid matcher on an unsupported event does not disable supported hooks', async () => {
+    const dir = writeConfig({
+      Setup: [{ matcher: '(', hooks: [{ type: 'command', command: 'exit 0' }] }],
+      UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'exit 2' }] }],
+    })
+    const adapter = new MockAdapter([textResponse('should not run')])
+    const warn = vi.fn()
+    const ctx = await harness(dir, adapter, (ctx) => { ctx.logger.warn = warn as never })
+    const agent = ctx.agentLoop.create(SessionId('unsupported-claude-matcher'), { provider: 'mock', model: 'mock' })
+    agent.followup(createUserMessage({ content: [{ type: 'text', text: 'go' }], source: { kind: 'user' } }))
+    await waitForIdle(ctx, agent)
+
+    expect(adapter.requests).toHaveLength(0)
+    expect(events(agent).some(event => event.type === 'turn/start')).toBe(false)
+    expect(warn).not.toHaveBeenCalledWith(expect.stringContaining('invalid claude regex matcher'))
+  })
+
   it('disposing the bridge fiber removes its listeners (HMR safety)', async () => {
     // A BLOCKING UserPromptSubmit hook: if the listener leaked past dispose it
     // would veto the prompt (0 model requests) and log a hook/invoked. Build the
diff --git a/packages/hooks/hooks-claude/tests/config.spec.ts b/packages/hooks/hooks-claude/tests/config.spec.ts
index f635ef0fd9..343fd6730e 100644
--- a/packages/hooks/hooks-claude/tests/config.spec.ts
+++ b/packages/hooks/hooks-claude/tests/config.spec.ts
@@ -63,4 +63,33 @@ describe('parseClaudeConfig', () => {
     const { config } = parseClaudeConfig({ Stop: [{ hooks: [{ type: 'command', command: 's.sh' }] }] })
     expect('matcher' in config.Stop![0]!).toBe(false)
   })
+
+  it('rejects an invalid regex matcher with its event name', () => {
+    expect(() => parseClaudeConfig({
+      PreToolUse: [{ matcher: '(', hooks: [{ type: 'command', command: 'x.sh' }] }],
+    })).toThrow('invalid claude regex matcher "(" on event "PreToolUse"')
+  })
+
+  it('discards matcher fields on events without matcher subjects before validation', () => {
+    const { config } = parseClaudeConfig({
+      UserPromptSubmit: [{ matcher: '[', hooks: [{ type: 'command', command: 'prompt.sh' }] }],
+      Stop: [{ matcher: '(', hooks: [{ type: 'command', command: 'stop.sh' }] }],
+    })
+
+    expect(config).toEqual({
+      UserPromptSubmit: [{ hooks: [{ command: 'prompt.sh' }] }],
+      Stop: [{ hooks: [{ command: 'stop.sh' }] }],
+    })
+  })
+
+  it('ignores invalid matchers on unsupported events without dropping supported hooks', () => {
+    const { config } = parseClaudeConfig({
+      Setup: [{ matcher: '(', hooks: [{ type: 'command', command: 'ignored.sh' }] }],
+      PreToolUse: [{ matcher: 'Bash', hooks: [{ type: 'command', command: 'kept.sh' }] }],
+    })
+
+    expect(config).toEqual({
+      PreToolUse: [{ matcher: 'Bash', hooks: [{ command: 'kept.sh' }] }],
+    })
+  })
 })
diff --git a/packages/hooks/hooks-codex/README.i18n.yaml b/packages/hooks/hooks-codex/README.i18n.yaml
index 74155768be..90e7f7c1dd 100644
--- a/packages/hooks/hooks-codex/README.i18n.yaml
+++ b/packages/hooks/hooks-codex/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/hooks/hooks-codex/README.md
-README.md: fd57762c6fb91e0ea47ec57c30bf9850bc488a33
-README.zh.md: 58b387e22f0e56770e4ea779f184c6c82a38ff98
+README.md: e906810ed58c3d0204c618c32787af06c91cfb78
+README.zh.md: 4940fdb976dd963bbb2e41c0ec6ef274ee475334
diff --git a/packages/hooks/hooks-codex/README.md b/packages/hooks/hooks-codex/README.md
index fd57762c6f..e906810ed5 100644
--- a/packages/hooks/hooks-codex/README.md
+++ b/packages/hooks/hooks-codex/README.md
@@ -34,7 +34,7 @@ In a `cordis.yml`:
     model: deepseek-v4
 ```
 
-The config is parsed **once** at load. `configPath` is **process-level** — a relative path resolves against the process launch cwd at load time, not per-session (`TODO(per-session-hook-config)`). A read/parse failure is contained (logs + registers nothing). Only sync `type: 'command'` hooks run — a non-command or `async: true` hook is parsed-and-skipped with a warning. A hook accepts `timeout` or the `timeoutSec` alias; one that sets neither runs under the protocol's reference default (`DEFAULT_HOOK_TIMEOUT_MS` from `dsh-hook-protocol`, 10 minutes). Events outside the five bridge-supported points are dropped at parse.
+The config is parsed **once** at load. `configPath` is **process-level** — a relative path resolves against the process launch cwd at load time, not per-session (`TODO(per-session-hook-config)`). A read/parse failure is contained (logs + registers nothing); an invalid regex matcher on an event that consumes matchers is one such failure and reports its pattern and event. Only sync `type: 'command'` hooks run — a non-command or `async: true` hook is parsed-and-skipped with a warning. A hook accepts `timeout` or the `timeoutSec` alias; one that sets neither runs under the protocol's reference default (`DEFAULT_HOOK_TIMEOUT_MS` from `dsh-hook-protocol`, 10 minutes). Events outside the five bridge-supported points are dropped at parse.
 
 The hooks themselves run in the agent's session workspace: for the agent-scoped points the bridge passes the session's `cwd` as the hook process's working directory, so a hook operates in the user's project tree, not the server launch dir.
 
diff --git a/packages/hooks/hooks-codex/README.zh.md b/packages/hooks/hooks-codex/README.zh.md
index 58b387e22f..4940fdb976 100644
--- a/packages/hooks/hooks-codex/README.zh.md
+++ b/packages/hooks/hooks-codex/README.zh.md
@@ -7,7 +7,7 @@
 该桥接实现 Codex 当前 hook 协议的一个明确子集：
 
 - **10 个 hook 点中的 5 个：** `PreToolUse`、`PostToolUse`、`SessionStart`、`UserPromptSubmit` 和 `Stop`。
-- **只使用正则 matcher**（没有字面快速路径；matcher 始终是未锚定正则）。
+- **仅使用正则的 matcher**（没有字面量快速路径；matcher 始终是未锚定正则）。
 - **snake_case stdin payload**，携带 `turn_id`／`model` 额外字段，写入时**不带**尾随换行符。
 - **没有 Codex 插件 env 注入，也没有配置时 placeholder 替换**（命令仍会接收执行器环境，并通过其 shell 运行）。
 - **没有工具前审批或改写路径**：hook 可以阻塞，但桥接不会预审批或替换工具输入。
@@ -34,7 +34,7 @@ const config: Config = {
     model: deepseek-v4
 ```
 
-配置只在加载时解析**一次**。`configPath` 是**进程级**配置：相对路径在加载时根据进程启动 cwd 解析，而非每会话解析（`TODO(per-session-hook-config)`）。读取／解析失败会被隔离处理（记录 + 不注册任何内容）。只运行同步 `type: 'command'` hook；非 command 或 `async: true` hook 会被解析并跳过，同时记录警告。hook 接受 `timeout` 或 `timeoutSec` alias；两者都未设置时，使用协议参考默认值 `DEFAULT_HOOK_TIMEOUT_MS`（来自 `dsh-hook-protocol`，10 分钟）。五个桥接支持点之外的事件会在解析时丢弃。
+配置只在加载时解析**一次**。`configPath` 是**进程级**配置：相对路径在加载时根据进程启动 cwd 解析，而非每会话解析（`TODO(per-session-hook-config)`）。读取／解析失败会被隔离处理（记录 + 不注册任何内容）；实际消费 matcher 的事件所带的无效 matcher 正则属于此类失败，并报告其 pattern 与事件。只运行同步 `type: 'command'` hook；非 command 或 `async: true` hook 会被解析并跳过，同时记录警告。hook 接受 `timeout` 或 `timeoutSec` alias；两者都未设置时，使用协议参考默认值 `DEFAULT_HOOK_TIMEOUT_MS`（来自 `dsh-hook-protocol`，10 分钟）。五个桥接支持点之外的事件会在解析时丢弃。
 
 hook 本身会在 agent（智能体）的会话工作区中运行：对 agent scope 点，桥接会将会话 `cwd` 作为 hook 进程工作目录，因此 hook 作用于用户项目树，而非服务器启动目录。
 
diff --git a/packages/hooks/hooks-codex/src/config.ts b/packages/hooks/hooks-codex/src/config.ts
index e602ddb20c..ae82340ad4 100644
--- a/packages/hooks/hooks-codex/src/config.ts
+++ b/packages/hooks/hooks-codex/src/config.ts
@@ -5,7 +5,7 @@
  * @module @deepseek-ai/dsh-hooks-codex/config
  */
 
-import type { MatcherGroup } from '@deepseek-ai/dsh-hook-protocol'
+import { matcherDiagnostic, type MatcherGroup } from '@deepseek-ai/dsh-hook-protocol'
 
 /** The five Codex hook points this bridge supports. */
 export const CODEX_EVENTS = ['PreToolUse', 'PostToolUse', 'SessionStart', 'UserPromptSubmit', 'Stop'] as const
@@ -33,7 +33,10 @@ function asObject(value: unknown): Record<string, unknown> | undefined {
 
 /**
  * Parse a wrapped or bare Codex event map. Unknown events and malformed entries are ignored rather
- * than failing boot; unsupported or asynchronous hooks are returned in `skipped`.
+ * than failing boot; unsupported or asynchronous hooks are returned in `skipped`. Matcher fields on
+ * UserPromptSubmit and Stop are discarded because those events have no matcher subject. A
+ * matcher-bearing runnable group with an invalid regex throws a `SyntaxError`, allowing the bridge
+ * to reject the complete config before listener registration.
  * @param raw - the parsed JSON config: a `{ hooks: … }` wrapper or the bare event map.
  * @returns the runnable per-event groups plus the skipped hooks with their reasons.
  */
@@ -69,7 +72,12 @@ export function parseCodexConfig(raw: unknown): ParsedCodexConfig {
         commands.push({ command: hook.command, ...timeout !== undefined ? { timeoutSec: timeout } : {} })
       }
       if (commands.length === 0) continue
-      groups.push({ ...typeof group.matcher === 'string' ? { matcher: group.matcher } : {}, hooks: commands })
+      const matcher = event === 'UserPromptSubmit' || event === 'Stop'
+        ? undefined
+        : typeof group.matcher === 'string' ? group.matcher : undefined
+      const diagnostic = matcherDiagnostic(matcher, 'codex')
+      if (diagnostic !== undefined) throw new SyntaxError(`${diagnostic} on event ${JSON.stringify(event)}`)
+      groups.push({ ...matcher !== undefined ? { matcher } : {}, hooks: commands })
     }
     if (groups.length > 0) config[event] = groups
   }
diff --git a/packages/hooks/hooks-codex/tests/bridge.spec.ts b/packages/hooks/hooks-codex/tests/bridge.spec.ts
index 7eace0c6c3..3e9ae5617a 100644
--- a/packages/hooks/hooks-codex/tests/bridge.spec.ts
+++ b/packages/hooks/hooks-codex/tests/bridge.spec.ts
@@ -39,12 +39,13 @@ function writeHooks(dir: string, hooks: unknown): void {
   writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks }))
 }
 
-async function harness(dir: string, adapter: MockAdapter): Promise<Context> {
+async function harness(dir: string, adapter: MockAdapter, beforeHooks?: (ctx: Context) => void): Promise<Context> {
   const ctx = new Context()
   await mountAgentLoopTestDependencies(ctx)
   await ctx.plugin(AgentLoop, { agents: [] })
   await ctx.plugin(LocalSubprocessService)
   await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
+  beforeHooks?.(ctx)
   await ctx.plugin(HooksCodex, { configPath: join(dir, 'hooks.json'), model: 'test-model' })
   ctx.llm.registerAdapter(['mock'], adapter)
   return ctx
@@ -88,11 +89,11 @@ describe('hooks-codex bridge', () => {
 
   it('a Stop hook (exit 2) forces the turn to continue with the reason as steering', async () => {
     const dir = configDir()
-    // Block once with a marker; until the loop guard lands, an always-blocking
-    // hook would never let this test finish.
+    // Stop ignores its malformed matcher field. Block once with a marker;
+    // until the loop guard lands, an always-blocking hook would never finish.
     const marker = join(dir, 'fired')
     const cont = script(dir, 'cont.sh', `#!/usr/bin/env bash\nif [ -e "${marker}" ]; then exit 0; fi\ntouch "${marker}"\necho "keep going: address the goal" >&2\nexit 2\n`)
-    writeHooks(dir, { Stop: [{ hooks: [{ type: 'command', command: cont }] }] })
+    writeHooks(dir, { Stop: [{ matcher: '[', hooks: [{ type: 'command', command: cont }] }] })
 
     const adapter = new MockAdapter([textResponse('first answer'), textResponse('second answer after goal')])
     const ctx = await harness(dir, adapter)
@@ -151,6 +152,26 @@ describe('hooks-codex bridge', () => {
     expect(adapter.requests).toHaveLength(1)
   })
 
+  it('an invalid regex matcher is reported and registers no hooks', async () => {
+    const dir = configDir()
+    writeHooks(dir, {
+      UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'exit 2' }] }],
+      PreToolUse: [{ matcher: '[', hooks: [{ type: 'command', command: 'exit 2' }] }],
+    })
+    const adapter = new MockAdapter([textResponse('ok')])
+    const warn = vi.fn()
+    const ctx = await harness(dir, adapter, (ctx) => { ctx.logger.warn = warn as never })
+    const agent = ctx.agentLoop.create(SessionId('invalid-codex-matcher'), { provider: 'mock', model: 'mock' })
+    agent.followup(createUserMessage({ content: [{ type: 'text', text: 'go' }], source: { kind: 'user' } }))
+    await waitForIdle(ctx, agent)
+    expect(adapter.requests).toHaveLength(1)
+    expect(events(agent).some(event => event.type === 'hook/invoked')).toBe(false)
+
+    expect(warn).toHaveBeenCalledWith(expect.stringContaining(
+      'invalid codex regex matcher "[" on event "PreToolUse"',
+    ))
+  })
+
   it('disposing the bridge fiber removes its listeners (HMR safety)', async () => {
     const dir = configDir()
     // A leaked listener would let this blocking hook veto the prompt and log an invocation; a
diff --git a/packages/hooks/hooks-codex/tests/config.spec.ts b/packages/hooks/hooks-codex/tests/config.spec.ts
index 09bce12a43..8503d13151 100644
--- a/packages/hooks/hooks-codex/tests/config.spec.ts
+++ b/packages/hooks/hooks-codex/tests/config.spec.ts
@@ -65,4 +65,22 @@ describe('parseCodexConfig', () => {
     const { config } = parseCodexConfig({ PreToolUse: [{ matcher: '^Bash$', hooks: [{ type: 'command', command: 'b.sh' }] }] })
     expect(config.PreToolUse![0]!.matcher).toBe('^Bash$')
   })
+
+  it('rejects an invalid regex matcher with its event name', () => {
+    expect(() => parseCodexConfig({
+      PreToolUse: [{ matcher: '[', hooks: [{ type: 'command', command: 's.sh' }] }],
+    })).toThrow('invalid codex regex matcher "[" on event "PreToolUse"')
+  })
+
+  it('discards matcher fields on events without matcher subjects before validation', () => {
+    const { config } = parseCodexConfig({
+      UserPromptSubmit: [{ matcher: '[', hooks: [{ type: 'command', command: 'prompt.sh' }] }],
+      Stop: [{ matcher: '(', hooks: [{ type: 'command', command: 'stop.sh' }] }],
+    })
+
+    expect(config).toEqual({
+      UserPromptSubmit: [{ hooks: [{ command: 'prompt.sh' }] }],
+      Stop: [{ hooks: [{ command: 'stop.sh' }] }],
+    })
+  })
 })