fix(hooks): reuse compiled Codex matchers

.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: 37f379a199b6e613101f76ac1700671eae1915b8
-2026-06-30-hook-protocol-lib.zh.md: 4f03ce6d9c33c16c9a12dc3dbe2a673a31eb0d85
+2026-06-30-hook-protocol-lib.md: a169b94611fa3f5b9606a100957b3146b662ee12
+2026-06-30-hook-protocol-lib.zh.md: 56e32d36dbda882ce72026f8d9425aac5b97e9eb

.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** — `matcherDiagnostic(pattern, mode)` and `matchesMatcher(pattern, query, mode)`. Pure `[A-Za-z0-9_|]+` patterns use the shared exact-match fast path (pipe = alternatives); the ONE remaining dialect axis is collapsed to `mode`: other Claude patterns use JavaScript `RegExp`, while other Codex patterns use Rust `regex`, including Rust-only syntax such as `(?i)`. 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.
+- **Matcher** — `matcherDiagnostic(pattern, mode)`, `compileMatchers(patterns, mode)`, and `matchesMatcher(pattern, query, mode)`. Pure `[A-Za-z0-9_|]+` patterns use the shared exact-match fast path (pipe = alternatives); the ONE remaining dialect axis is collapsed to `mode`: other Claude patterns use JavaScript `RegExp`, while other Codex patterns use Rust `regex`, including Rust-only syntax such as `(?i)`. 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. For runtime, a bridge compiles its finite set of unique config patterns ONCE, reuses that set across hook points, and disposes it after detached runs drain on plugin teardown. This config-scoped ownership avoids a module-global cache while preventing repeated Rust/WASM construction from raising a non-shrinking memory high-water mark on every match. The one-shot predicate 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.

.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** — `matcherDiagnostic(pattern, mode)` 与 `matchesMatcher(pattern, query, mode)`。纯 `[A-Za-z0-9_|]+` pattern 使用共享的精确匹配快速路径（管道符 = 多选）；剩余的唯一方言差异收敛为 `mode`：其他 Claude pattern 使用 JavaScript `RegExp`，其他 Codex pattern 使用 Rust `regex`，包括 `(?i)` 等 Rust 专属语法。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 matcher 字段，再校验剩余的可运行 group；其中的无效正则会导致整份配置加载失败，并输出稳定的方言／模式／事件诊断，且不注册任何 hook 监听器。运行时匹配仍将无效正则收敛为不匹配，因此直接调用本库时绝不向 agent loop（智能体循环）抛异常。
+- **Matcher** — `matcherDiagnostic(pattern, mode)`、`compileMatchers(patterns, mode)` 与 `matchesMatcher(pattern, query, mode)`。纯 `[A-Za-z0-9_|]+` pattern 使用共享的精确匹配快速路径（管道符 = 多选）；剩余的唯一方言差异收敛为 `mode`：其他 Claude pattern 使用 JavaScript `RegExp`，其他 Codex pattern 使用 Rust `regex`，包括 `(?i)` 等 Rust 专属语法。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 matcher 字段，再校验剩余的可运行 group；其中的无效正则会导致整份配置加载失败，并输出稳定的方言／模式／事件诊断，且不注册任何 hook 监听器。运行时，桥接会将配置中有限的唯一 pattern 集合只编译一次，在各 hook 点重复使用，并在插件 teardown 时先 drain 脱离运行，再释放该集合。这种配置作用域的所有权既避免模块全局缓存，也防止反复构造 Rust／WASM 正则在每次匹配时抬高且无法收缩的内存高水位。一次性谓词仍将无效正则收敛为不匹配，因此直接调用本库时绝不向 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。

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: e8e3e1b078f74636ee23f90a96d1e8748d7af373
-README.zh.md: 4671b179b222eea68cbcb00042d2ddcfe9a5691f
+README.md: 1b4c6c3b73b0d4f3d5df06405d27b94652b6c686
+README.zh.md: 5b55034ff136129f83ae90a84b8efc89affcfce0

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 validation + test | `matcherDiagnostic(pattern, mode)` for parse-time diagnostics; `matchesMatcher(pattern, query, mode)` for contained runtime matching | picks its native regex `mode` (`claude` = JavaScript, `codex` = Rust `regex`) and rejects a config group carrying a diagnostic |
+| Matcher validation + test | `matcherDiagnostic(pattern, mode)` for parse-time diagnostics; `compileMatchers(patterns, mode)` for repeated config-lifetime matching; `matchesMatcher(pattern, query, mode)` for one-shot contained matching | picks its native regex `mode` (`claude` = JavaScript, `codex` = Rust `regex`), rejects a config group carrying a diagnostic, and disposes the compiled set on teardown |
 | 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
 
-- **`matcherDiagnostic(matcher, mode)` / `matchesMatcher(matcher, query, mode)`** — match-all on absent/`''`/`'*'`; both dialects treat a pure `[A-Za-z0-9_|]+` pattern as exact pipe-separated alternatives. Other patterns are unanchored regexes compiled in the native dialect: JavaScript for Claude Code, Rust `regex` for Codex (including inline flags such as `(?i)`). 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.
+- **`matcherDiagnostic(matcher, mode)` / `compileMatchers(matchers, mode)` / `matchesMatcher(matcher, query, mode)`** — match-all on absent/`''`/`'*'`; both dialects treat a pure `[A-Za-z0-9_|]+` pattern as exact pipe-separated alternatives. Other patterns are unanchored regexes compiled in the native dialect: JavaScript for Claude Code, Rust `regex` for Codex (including inline flags such as `(?i)`). 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. Each bridge uses `compileMatchers` to compile every unique config pattern once, reuses it at every hook point, and disposes the finite set after detached runs drain on plugin teardown; this avoids the Rust/WASM allocator's non-shrinking high-water mark growing on every match. `matchesMatcher` remains the contained one-shot predicate, and invalid runtime patterns are non-matches rather than exceptions.
 - **`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.

packages/hooks/hook-protocol/README.zh.md

@@ -10,7 +10,7 @@ Claude Code／Codex hook 协议格式的**共享核心**。它不是 cordis 插
 
 | 关注点 | 此处（`dsh-hook-protocol`） | 桥接（`dsh-hooks-claude` / `-codex`） |
 |---|---|---|
-| Matcher 校验 + 测试 | `matcherDiagnostic(pattern, mode)` 用于解析时诊断；`matchesMatcher(pattern, query, mode)` 用于收敛的运行时匹配 | 选择自身原生正则 `mode`（`claude` = JavaScript，`codex` = Rust `regex`），并拒绝带有诊断的配置组 |
+| Matcher 校验 + 测试 | `matcherDiagnostic(pattern, mode)` 用于解析时诊断；`compileMatchers(patterns, mode)` 用于配置生命周期内的重复匹配；`matchesMatcher(pattern, query, mode)` 用于一次性的收敛匹配 | 选择自身原生正则 `mode`（`claude` = JavaScript，`codex` = Rust `regex`），拒绝带有诊断的配置组，并在 teardown 时释放已编译集合 |
 | 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 协议格式的**共享核心**。它不是 cordis 插
 
 ## 原语
 
-- **`matcherDiagnostic(matcher, mode)` / `matchesMatcher(matcher, query, mode)`**：缺失、`''` 或 `'*'` 时匹配全部；两种方言都将纯 `[A-Za-z0-9_|]+` pattern 视为按 pipe 分隔的精确多选。其他 pattern 会用原生方言编译为未锚定正则：Claude Code 使用 JavaScript，Codex 使用 Rust `regex`（包括 `(?i)` 等内联 flag）。桥接解析器会丢弃没有 matcher 匹配对象的事件所带 matcher 字段，再使用 `matcherDiagnostic` 在注册任何 hook 之前拒绝实际会被消费的无效正则，并输出稳定诊断。运行时谓词仍将无效 pattern 收敛为不匹配，因此直接库调用无法向 agent loop 抛出异常。
+- **`matcherDiagnostic(matcher, mode)` / `compileMatchers(matchers, mode)` / `matchesMatcher(matcher, query, mode)`**：缺失、`''` 或 `'*'` 时匹配全部；两种方言都将纯 `[A-Za-z0-9_|]+` pattern 视为按 pipe 分隔的精确多选。其他 pattern 会用原生方言编译为未锚定正则：Claude Code 使用 JavaScript，Codex 使用 Rust `regex`（包括 `(?i)` 等内联 flag）。桥接解析器会丢弃没有 matcher 匹配对象的事件所带 matcher 字段，再使用 `matcherDiagnostic` 在注册任何 hook 之前拒绝实际会被消费的无效正则，并输出稳定诊断。每个桥接通过 `compileMatchers` 将配置中每个唯一 pattern 只编译一次，在各 hook 点重复使用，并在插件 teardown 时先 drain 脱离运行，再释放这个有限集合；因此 Rust／WASM 分配器不会因每次匹配都抬高且无法收缩的内存高水位。`matchesMatcher` 保留为收敛的一次性谓词，运行时无效 pattern 仍是不匹配而非异常。
 - **`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` 受信任插件表层），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 2 使用 stderr 阻塞；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**，首个 `continue:false` 使 halt 粘滞，阻塞原因用 `\n\n` 连接，`additionalContext`／`systemMessages` 按顺序累积。

packages/hooks/hook-protocol/src/index.ts

@@ -13,7 +13,8 @@ export type {
   MatcherGroup,
   MatcherMode,
 } from './types.ts'
-export { matcherDiagnostic, matchesMatcher } from './matcher.ts'
+export { compileMatchers, matcherDiagnostic, matchesMatcher } from './matcher.ts'
+export type { CompiledMatchers } from './matcher.ts'
 export { parseHookOutput } from './codec.ts'
 export { DEFAULT_HOOK_TIMEOUT_MS, runHook } from './runner.ts'
 export type { RunHookOptions, RunHookResult } from './runner.ts'

packages/hooks/hook-protocol/src/matcher.ts

@@ -28,6 +28,19 @@ function isMatchAll(matcher: string | undefined): boolean {
 /** An exact pattern is purely word chars + `|` (the regex-vs-literal discriminator). */
 const EXACT_MATCHER = /^[A-Za-z0-9_|]+$/
 
+interface CompiledMatcher {
+  matches(query: string): boolean
+  dispose(): void
+}
+
+/** A config-lifetime matcher set compiled once and explicitly released. */
+export interface CompiledMatchers {
+  /** Match one of the patterns supplied to {@link compileMatchers}. */
+  matches(matcher: string | undefined, query: string): boolean
+  /** Release every native matcher. Safe to call more than once. */
+  dispose(): void
+}
+
 /** Compile one dialect's unanchored regex; invalid patterns return `undefined`. */
 function compileRegex(pattern: string, mode: MatcherMode): RegExp | RustRegex | undefined {
   try {
@@ -39,11 +52,55 @@ function compileRegex(pattern: string, mode: MatcherMode): RegExp | RustRegex |
   }
 }
 
-/** Release the WASM-backed Codex regex once a one-shot validation or match is done. */
+/** Release a WASM-backed Codex regex when its owning matcher lifetime ends. */
 function disposeRegex(regex: RegExp | RustRegex): void {
   if (regex instanceof RRegex) regex.free()
 }
 
+/** Compile one matcher into a reusable, explicitly disposable predicate. */
+function compileMatcher(matcher: string | undefined, mode: MatcherMode): CompiledMatcher {
+  if (isMatchAll(matcher)) return { matches: () => true, dispose: () => {} }
+  const pattern = matcher as string
+  if (EXACT_MATCHER.test(pattern)) {
+    const alternatives = new Set(pattern.split('|'))
+    return { matches: query => alternatives.has(query), dispose: () => {} }
+  }
+  const regex = compileRegex(pattern, mode)
+  if (regex === undefined) return { matches: () => false, dispose: () => {} }
+  return {
+    matches: query => regex instanceof RRegex ? regex.isMatch(query) : regex.test(query),
+    dispose: () => { disposeRegex(regex) },
+  }
+}
+
+/**
+ * Compile a finite config's unique matcher patterns for repeated evaluation.
+ * The returned registry owns native Rust-regex allocations; its caller must
+ * dispose it when the config/plugin lifetime ends.
+ * @param matchers - the complete finite set of patterns in one loaded config.
+ * @param mode - the native regex dialect used for non-literal patterns.
+ * @returns a reusable registry that owns and disposes its compiled regexes.
+ */
+export function compileMatchers(matchers: Iterable<string | undefined>, mode: MatcherMode): CompiledMatchers {
+  const compiled = new Map<string | undefined, CompiledMatcher>()
+  for (const matcher of matchers) {
+    if (!compiled.has(matcher)) compiled.set(matcher, compileMatcher(matcher, mode))
+  }
+  let disposed = false
+  return {
+    matches(matcher, query) {
+      if (disposed) return false
+      return compiled.get(matcher)?.matches(query) ?? false
+    },
+    dispose() {
+      if (disposed) return
+      disposed = true
+      for (const matcher of compiled.values()) matcher.dispose()
+      compiled.clear()
+    },
+  }
+}
+
 /**
  * Validate one matcher before a bridge accepts its config group.
  * @param matcher - configured pattern; match-all sentinels are valid.
@@ -73,17 +130,10 @@ export function matcherDiagnostic(matcher: string | undefined, mode: MatcherMode
  *   regex.
  */
 export function matchesMatcher(matcher: string | undefined, query: string, mode: MatcherMode): boolean {
-  if (isMatchAll(matcher)) return true
-  // matcher is a non-empty string past the match-all guard.
-  const pattern = matcher as string
-  if (EXACT_MATCHER.test(pattern)) {
-    return pattern.split('|').includes(query)
-  }
-  const regex = compileRegex(pattern, mode)
-  if (regex === undefined) return false
+  const compiled = compileMatcher(matcher, mode)
   try {
-    return regex instanceof RRegex ? regex.isMatch(query) : regex.test(query)
+    return compiled.matches(query)
   } finally {
-    disposeRegex(regex)
+    compiled.dispose()
   }
 }

packages/hooks/hook-protocol/tests/matcher-lifecycle.spec.ts

@@ -0,0 +1,45 @@
+import { createRequire } from 'node:module'
+import { describe, expect, it, vi } from 'vitest'
+import type { RRegex as RustRegex } from 'rregex'
+
+describe('compileMatchers — native regex lifecycle', () => {
+  it('constructs each unique Codex regex once across repeated matches and frees it once', async () => {
+    const require = createRequire(import.meta.url)
+    const rregex = require('rregex') as { RRegex: new(pattern: string) => RustRegex }
+    const OriginalRRegex = rregex.RRegex
+    const construct = vi.fn<(pattern: string) => void>()
+    const free = vi.fn<() => void>()
+
+    class CountingRRegex extends OriginalRRegex {
+      constructor(pattern: string) {
+        super(pattern)
+        construct(pattern)
+      }
+
+      override free(): void {
+        free()
+        super.free()
+      }
+    }
+
+    rregex.RRegex = CountingRRegex
+    vi.resetModules()
+    try {
+      const { compileMatchers } = await import('@deepseek-ai/dsh-hook-protocol/src/matcher.ts')
+      const matchers = compileMatchers(['(?i)^bash$', '(?i)^bash$', '^write$'], 'codex')
+      expect(construct.mock.calls.map(([pattern]) => pattern)).toEqual(['(?i)^bash$', '^write$'])
+
+      for (let i = 0; i < 1_000; i++) {
+        expect(matchers.matches('(?i)^bash$', 'BASH')).toBe(true)
+      }
+      expect(construct).toHaveBeenCalledTimes(2)
+
+      matchers.dispose()
+      matchers.dispose()
+      expect(free).toHaveBeenCalledTimes(2)
+    } finally {
+      rregex.RRegex = OriginalRRegex
+      vi.resetModules()
+    }
+  })
+})

packages/hooks/hook-protocol/tests/matcher.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { matcherDiagnostic, matchesMatcher } from '@deepseek-ai/dsh-hook-protocol'
+import { compileMatchers, matcherDiagnostic, matchesMatcher } from '@deepseek-ai/dsh-hook-protocol'
 
 describe('matchesMatcher — match-all sentinels (both dialects)', () => {
   for (const mode of ['claude', 'codex'] as const) {
@@ -82,3 +82,28 @@ describe('matcherDiagnostic — parse-time diagnostics', () => {
     expect(matcherDiagnostic('(?=Bash)', 'codex')).toBe('invalid codex regex matcher "(?=Bash)"')
   })
 })
+
+describe('compileMatchers — config-lifetime reuse', () => {
+  it('compiles a finite set, contains unknown patterns, and stops after disposal', () => {
+    const matchers = compileMatchers([undefined, 'Edit|Write', '(?i)^bash$', '['], 'codex')
+
+    expect(matchers.matches(undefined, 'anything')).toBe(true)
+    expect(matchers.matches('Edit|Write', 'Write')).toBe(true)
+    expect(matchers.matches('Edit|Write', 'WriteFile')).toBe(false)
+    expect(matchers.matches('(?i)^bash$', 'BASH')).toBe(true)
+    expect(matchers.matches('[', 'anything')).toBe(false)
+    expect(matchers.matches('not-compiled', 'not-compiled')).toBe(false)
+
+    matchers.dispose()
+    expect(matchers.matches(undefined, 'anything')).toBe(false)
+    expect(matchers.matches('(?i)^bash$', 'BASH')).toBe(false)
+    expect(() => { matchers.dispose() }).not.toThrow()
+  })
+
+  it('reuses JavaScript regexes too', () => {
+    const matchers = compileMatchers(['^Bash$', '^Bash$'], 'claude')
+    expect(matchers.matches('^Bash$', 'Bash')).toBe(true)
+    expect(matchers.matches('^Bash$', 'BashOutput')).toBe(false)
+    matchers.dispose()
+  })
+})

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

@@ -21,10 +21,10 @@ import type { PostToolDecision, PreToolDecision, ToolExecution, ToolExecutionRes
 import {
   appendHookInvoked,
   appendHookResult,
+  compileMatchers,
   createDetachedRuns,
   DEFAULT_HOOK_TIMEOUT_MS,
   DEFAULT_STDERR_SUMMARY_MAX_CHARS,
-  matchesMatcher,
   mergeHookOutputs,
   runHook,
   type HookOutput,
@@ -116,10 +116,21 @@ export function apply(ctx: Context, config: Config): void {
     return
   }
 
+  const matchers = compileMatchers(
+    Object.values(parsed).flatMap(groups => groups.map(group => group.matcher)),
+    'claude',
+  )
+
   // Emit-shaped points run detached, so track their chains; disposal aborts
-  // active hooks and drains continuations before resolving.
+  // active hooks and drains continuations before releasing matchers.
   const detached = createDetachedRuns()
-  ctx.effect(() => () => detached.drain(), 'hooks-claude: drain detached hook runs')
+  ctx.effect(() => async () => {
+    try {
+      await detached.drain()
+    } finally {
+      matchers.dispose()
+    }
+  }, 'hooks-claude: drain detached hook runs and dispose matchers')
 
   /**
    * Run every command hook configured for `point` whose matcher selects
@@ -147,7 +158,7 @@ export function apply(ctx: Context, config: Config): void {
     const projectDir = config.projectDir ?? workdir
     const hookEnv = projectDir !== undefined ? { CLAUDE_PROJECT_DIR: projectDir } : undefined
     for (const group of groups) {
-      if (!matchesMatcher(group.matcher, matchQuery, 'claude')) continue
+      if (!matchers.matches(group.matcher, matchQuery)) continue
       for (const hook of group.hooks) {
         const handlerId = nextHandlerId(point)
         const session = opts.agent?.session

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

@@ -25,10 +25,10 @@ import type { PostToolDecision, PreToolDecision, ToolExecution, ToolExecutionRes
 import {
   appendHookInvoked,
   appendHookResult,
+  compileMatchers,
   createDetachedRuns,
   DEFAULT_HOOK_TIMEOUT_MS,
   DEFAULT_STDERR_SUMMARY_MAX_CHARS,
-  matchesMatcher,
   mergeHookOutputs,
   runHook,
   type HookOutput,
@@ -99,11 +99,26 @@ export function apply(ctx: Context, config: Config): void {
 
   const model = config.model ?? ''
 
+  // Compile each distinct config matcher once. In particular, rebuilding an
+  // rregex WASM value on every hook point permanently raises the module's WASM
+  // memory high-water mark even when each value is freed.
+  const matchers = compileMatchers(
+    Object.values(parsed).flatMap(groups => groups.map(group => group.matcher)),
+    'codex',
+  )
+
   // SessionStart is the one emit-shaped (detached) point Codex has: track its
   // run chains so disposal aborts a still-running hook process and drains the
-  // continuation (docs/defensive-patterns.md: dispose must reach quiescence).
+  // continuation before releasing matchers (docs/defensive-patterns.md:
+  // dispose must reach quiescence).
   const detached = createDetachedRuns()
-  ctx.effect(() => () => detached.drain(), 'hooks-codex: drain detached hook runs')
+  ctx.effect(() => async () => {
+    try {
+      await detached.drain()
+    } finally {
+      matchers.dispose()
+    }
+  }, 'hooks-codex: drain detached hook runs and dispose matchers')
 
   /**
    * Run and fold one configured Codex hook point.
@@ -127,9 +142,11 @@ export function apply(ctx: Context, config: Config): void {
     // Run hooks in the agent's session workspace so relative paths address the
     // user's project rather than the server launch directory.
     const workdir = opts.agent?.session.header.cwd
+    // Keep each dialect's audit stamping readable beside its payload mapping.
+    /* jscpd:ignore-start */
     for (const group of groups) {
       // The protocol library owns Codex's exact-literal/Rust-regex split.
-      if (!matchesMatcher(group.matcher, matchQuery, 'codex')) continue
+      if (!matchers.matches(group.matcher, matchQuery)) continue
       for (const hook of group.hooks) {
         const handlerId = nextHandlerId(point)
         const session = opts.agent?.session
@@ -139,6 +156,7 @@ export function apply(ctx: Context, config: Config): void {
             ...group.matcher !== undefined ? { matcher: group.matcher } : {},
           })
         }
+        /* jscpd:ignore-end */
         const { output, durationMs } = await runHook(ctx.bash, hook, {
           payload,
           defaultTimeoutMs,

packages/hooks/hooks-codex/tests/matcher-lifecycle.spec.ts

@@ -0,0 +1,73 @@
+import { createRequire } from 'node:module'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { Context } from 'cordis'
+import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
+import LocalSubprocessService from '@deepseek-ai/dsh-subprocess-local'
+
+interface RustRegexInstance {
+  free(): void
+}
+
+const dirs: string[] = []
+afterEach(() => { for (const dir of dirs.splice(0)) rmSync(dir, { recursive: true, force: true }) })
+
+describe('hooks-codex matcher lifecycle', () => {
+  it('constructs one reusable runtime regex and frees it on plugin teardown', async () => {
+    // The product deliberately loads rregex through createRequire so Cordis can
+    // discover the bridge synchronously. Patch that SAME CJS export, rather
+    // than an ESM mock that would not observe the production load path.
+    const require = createRequire(new URL('../../hook-protocol/package.json', import.meta.url))
+    const rregex = require('rregex') as { RRegex: new(pattern: string) => RustRegexInstance }
+    const OriginalRRegex = rregex.RRegex
+    const construct = vi.fn<(pattern: string) => void>()
+    const free = vi.fn<() => void>()
+
+    class CountingRRegex extends OriginalRRegex {
+      constructor(pattern: string) {
+        super(pattern)
+        construct(pattern)
+      }
+
+      override free(): void {
+        free()
+        super.free()
+      }
+    }
+
+    const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-codex-matchers-'))
+    dirs.push(dir)
+    const configPath = join(dir, 'hooks.json')
+    writeFileSync(configPath, JSON.stringify({ hooks: {
+      PreToolUse: [{ matcher: '(?i)^bash$', hooks: [{ type: 'command', command: 'true' }] }],
+      PostToolUse: [{ matcher: '(?i)^bash$', hooks: [{ type: 'command', command: 'true' }] }],
+    } }))
+
+    rregex.RRegex = CountingRRegex
+    vi.resetModules()
+    try {
+      const HooksCodex = await import('@deepseek-ai/dsh-hooks-codex')
+      const ctx = new Context()
+      await ctx.plugin(LocalSubprocessService)
+      await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
+      const fiber = await ctx.plugin(HooksCodex, { configPath, model: 'm' })
+
+      // The parser validates both groups one-shot (2 construct/free pairs), then
+      // the runtime registry compiles the duplicate pattern only once and owns it.
+      expect(construct.mock.calls.map(([pattern]) => pattern)).toEqual([
+        '(?i)^bash$',
+        '(?i)^bash$',
+        '(?i)^bash$',
+      ])
+      expect(free).toHaveBeenCalledTimes(2)
+
+      await fiber.dispose()
+      expect(free).toHaveBeenCalledTimes(3)
+    } finally {
+      rregex.RRegex = OriginalRRegex
+      vi.resetModules()
+    }
+  })
+})