diff --git a/biome.json b/biome.json
index 2f16ea0..78b4148 100644
--- a/biome.json
+++ b/biome.json
@@ -1,43 +1,43 @@
 {
-	"$schema": "https://biomejs.dev/schemas/2.4.11/schema.json",
-	"vcs": {
-		"enabled": true,
-		"clientKind": "git",
-		"useIgnoreFile": true
-	},
-	"files": {
-		"ignoreUnknown": true,
-		"includes": ["packages/**/*.ts"]
-	},
-	"formatter": {
-		"enabled": true,
-		"indentStyle": "space",
-		"indentWidth": 2
-	},
-	"linter": {
-		"enabled": true,
-		"rules": {
-			"recommended": true,
-			"suspicious": {
-				"noExplicitAny": "off"
-			},
-			"style": {
-				"noNonNullAssertion": "off"
-			}
-		}
-	},
-	"javascript": {
-		"formatter": {
-			"quoteStyle": "single",
-			"semicolons": "always"
-		}
-	},
-	"assist": {
-		"enabled": true,
-		"actions": {
-			"source": {
-				"organizeImports": "on"
-			}
-		}
-	}
+  "$schema": "https://biomejs.dev/schemas/2.4.11/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "ignoreUnknown": true,
+    "includes": ["packages/**/*.ts"]
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "suspicious": {
+        "noExplicitAny": "off"
+      },
+      "style": {
+        "noNonNullAssertion": "off"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single",
+      "semicolons": "always"
+    }
+  },
+  "assist": {
+    "enabled": true,
+    "actions": {
+      "source": {
+        "organizeImports": "on"
+      }
+    }
+  }
 }
diff --git a/packages/pulse/src/e2e/t7-survival.test.ts b/packages/pulse/src/e2e/t7-survival.test.ts
index 52befe7..afa4a9c 100644
--- a/packages/pulse/src/e2e/t7-survival.test.ts
+++ b/packages/pulse/src/e2e/t7-survival.test.ts
@@ -18,15 +18,15 @@ import {
 import {
   MAX_RESTART_COUNT,
   ROLLBACK_ERROR_THRESHOLD,
-} from '../survival/constants.js';
-import { rebuildHealth, survivalRules } from '../survival/index.js';
+} from '../rules/constants.js';
+import { rebuildHealth, survivalRules } from '../rules/index.js';
 import {
   autoRollback,
   llmWatchdog,
   processWatchdog,
   resourceGuard,
   type SurvivalSnapshot,
-} from '../survival/rules.js';
+} from '../rules/survival.js';
 
 // ── Helpers ────────────────────────────────────────────────────
 
diff --git a/packages/pulse/src/executors/index.ts b/packages/pulse/src/executors/index.ts
index c5ff6ae..9fdd86d 100644
--- a/packages/pulse/src/executors/index.ts
+++ b/packages/pulse/src/executors/index.ts
@@ -5,3 +5,9 @@ export {
   type CursorEffect,
   createCursorExecutor,
 } from './cursor-agent.js';
+
+export {
+  executeSurvivalEffect,
+  type SurvivalEffect,
+  type SurvivalExecDeps,
+} from './survival.js';
diff --git a/packages/pulse/src/survival/executors.test.ts b/packages/pulse/src/executors/survival.test.ts
similarity index 99%
rename from packages/pulse/src/survival/executors.test.ts
rename to packages/pulse/src/executors/survival.test.ts
index 2c4ae43..7ba4ade 100644
--- a/packages/pulse/src/survival/executors.test.ts
+++ b/packages/pulse/src/executors/survival.test.ts
@@ -5,7 +5,7 @@
 import { beforeEach, describe, expect, jest, test } from 'bun:test';
 import * as os from 'node:os';
 import * as path from 'node:path';
-import { executeSurvivalEffect, type SurvivalExecDeps } from './executors';
+import { executeSurvivalEffect, type SurvivalExecDeps } from './survival.js';
 
 // All mocks via dependency injection — NO global jest.mock to avoid cross-file pollution
 const mockExecSync = jest.fn();
diff --git a/packages/pulse/src/survival/executors.ts b/packages/pulse/src/executors/survival.ts
similarity index 99%
rename from packages/pulse/src/survival/executors.ts
rename to packages/pulse/src/executors/survival.ts
index 03f4806..dc493df 100644
--- a/packages/pulse/src/survival/executors.ts
+++ b/packages/pulse/src/executors/survival.ts
@@ -13,7 +13,7 @@ import * as os from 'node:os';
 import * as path from 'node:path';
 
 /** Allowlist pattern for safe shell arguments (service names, git refs, etc.) */
-const SAFE_ARG = /^[a-zA-Z0-9._\/@:-]+$/;
+const SAFE_ARG = /^[a-zA-Z0-9._/@:-]+$/;
 
 export interface SurvivalEffect {
   type: string;
diff --git a/packages/pulse/src/index.ts b/packages/pulse/src/index.ts
index d6a94e4..527bdd2 100644
--- a/packages/pulse/src/index.ts
+++ b/packages/pulse/src/index.ts
@@ -366,7 +366,12 @@ export {
 
 // ── Built-in Rules ─────────────────────────────────────────────
 
-export { adaptiveInterval, clampTick, dedup, errorBackoff } from './rules.js';
+export {
+  adaptiveInterval,
+  clampTick,
+  dedup,
+  errorBackoff,
+} from './rules/builtin.js';
 
 // ── Watcher ────────────────────────────────────────────────────
 
@@ -384,7 +389,7 @@ export * from './watchers/index.js';
 
 // ── Survival Layer ──────────────────────────────────────────────
 
-export * from './survival/index.js';
+export * from './rules/index.js';
 
 // ── Executors ─────────────────────────────────────────────────
 
diff --git a/packages/pulse/src/rules.test.ts b/packages/pulse/src/rules/builtin.test.ts
similarity index 99%
rename from packages/pulse/src/rules.test.ts
rename to packages/pulse/src/rules/builtin.test.ts
index 7a51630..0a22a5f 100644
--- a/packages/pulse/src/rules.test.ts
+++ b/packages/pulse/src/rules/builtin.test.ts
@@ -4,7 +4,7 @@
 
 import { describe, expect, it } from 'bun:test';
 
-import { adaptiveInterval, clampTick, dedup, errorBackoff } from './rules.js';
+import { adaptiveInterval, clampTick, dedup, errorBackoff } from './builtin.js';
 
 // Helper to apply rule with new onion middleware signature
 async function apply<S, E>(
diff --git a/packages/pulse/src/rules.ts b/packages/pulse/src/rules/builtin.ts
similarity index 98%
rename from packages/pulse/src/rules.ts
rename to packages/pulse/src/rules/builtin.ts
index fc0f740..fd040ab 100644
--- a/packages/pulse/src/rules.ts
+++ b/packages/pulse/src/rules/builtin.ts
@@ -5,7 +5,7 @@
  * adaptive intervals, effect deduplication.
  */
 
-import type { Rule } from './index.js';
+import type { Rule } from '../index.js';
 
 /**
  * Clamp tickMs within [min, max].
diff --git a/packages/pulse/src/survival/constants.ts b/packages/pulse/src/rules/constants.ts
similarity index 100%
rename from packages/pulse/src/survival/constants.ts
rename to packages/pulse/src/rules/constants.ts
diff --git a/packages/pulse/src/survival/health.ts b/packages/pulse/src/rules/health.ts
similarity index 100%
rename from packages/pulse/src/survival/health.ts
rename to packages/pulse/src/rules/health.ts
diff --git a/packages/pulse/src/rules/index.ts b/packages/pulse/src/rules/index.ts
new file mode 100644
index 0000000..bcadfe1
--- /dev/null
+++ b/packages/pulse/src/rules/index.ts
@@ -0,0 +1,10 @@
+export { adaptiveInterval, clampTick, dedup, errorBackoff } from './builtin.js';
+export {
+  ESSENTIAL_PROCESSES,
+  IDEMPOTENT_WINDOW_MS,
+  MAX_RESTART_COUNT,
+  ROLLBACK_ERROR_THRESHOLD,
+  ROLLBACK_WINDOW_MS,
+} from './constants.js';
+export { type HealthSnapshot, rebuildHealth } from './health.js';
+export { type SurvivalSnapshot, survivalRules } from './survival.js';
diff --git a/packages/pulse/src/survival/rules.test.ts b/packages/pulse/src/rules/survival.test.ts
similarity index 99%
rename from packages/pulse/src/survival/rules.test.ts
rename to packages/pulse/src/rules/survival.test.ts
index 9dc7290..dd1d5da 100644
--- a/packages/pulse/src/survival/rules.test.ts
+++ b/packages/pulse/src/rules/survival.test.ts
@@ -3,7 +3,7 @@
  */
 
 import { beforeEach, describe, expect, jest, test } from 'bun:test';
-import { MAX_RESTART_COUNT, ROLLBACK_ERROR_THRESHOLD } from './constants';
+import { MAX_RESTART_COUNT, ROLLBACK_ERROR_THRESHOLD } from './constants.js';
 import {
   autoRollback,
   errorEscalate,
@@ -13,7 +13,7 @@ import {
   panicRollback,
   processWatchdog,
   resourceGuard,
-} from './rules';
+} from './survival.js';
 
 // Mock inner function
 const mockInner = jest.fn(async () => [[], 15000]);
diff --git a/packages/pulse/src/survival/rules.ts b/packages/pulse/src/rules/survival.ts
similarity index 99%
rename from packages/pulse/src/survival/rules.ts
rename to packages/pulse/src/rules/survival.ts
index de15d7f..7c9de74 100644
--- a/packages/pulse/src/survival/rules.ts
+++ b/packages/pulse/src/rules/survival.ts
@@ -5,6 +5,7 @@
  * Rules are applied in array order (first element is outermost layer).
  */
 
+import type { SurvivalEffect } from '../executors/survival.js';
 import type { Rule, Sensed } from '../index.js';
 import type { ErrorLogData } from '../watchers/error-log.js';
 import type { GatewayHealthData } from '../watchers/gateway-health.js';
@@ -18,7 +19,6 @@ import {
   ROLLBACK_ERROR_THRESHOLD,
   ROLLBACK_WINDOW_MS,
 } from './constants.js';
-import type { SurvivalEffect } from './executors.js';
 import type { HealthSnapshot } from './health.js';
 
 // Define proper type for survival snapshot
diff --git a/packages/pulse/src/survival/index.ts b/packages/pulse/src/survival/index.ts
deleted file mode 100644
index 70c84cc..0000000
--- a/packages/pulse/src/survival/index.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-/**
- * Survival layer exports
- */
-
-export {
-  ESSENTIAL_PROCESSES,
-  IDEMPOTENT_WINDOW_MS,
-  MAX_RESTART_COUNT,
-} from './constants.js';
-export { executeSurvivalEffect, type SurvivalEffect } from './executors.js';
-export { type HealthSnapshot, rebuildHealth } from './health.js';
-export { type SurvivalSnapshot, survivalRules } from './rules.js';