diff --git a/package-lock.json b/package-lock.json
index d521dd2..ed06bd2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,6 +13,7 @@
         "packages/vfs",
         "packages/harness",
         "packages/memory",
+        "packages/persona",
         "packages/inbox",
         "packages/continuation",
         "packages/turn-context",
@@ -78,6 +79,10 @@
       "resolved": "packages/memory",
       "link": true
     },
+    "node_modules/@agent-assistant/persona": {
+      "resolved": "packages/persona",
+      "link": true
+    },
     "node_modules/@agent-assistant/policy": {
       "resolved": "packages/policy",
       "link": true
@@ -3663,7 +3668,7 @@
     },
     "packages/cloudflare-runtime": {
       "name": "@agent-assistant/cloudflare-runtime",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "dependencies": {
         "@agent-assistant/continuation": "^0.3.4",
         "@agent-assistant/surfaces": "^0.3.0",
@@ -3746,7 +3751,7 @@
     },
     "packages/connectivity": {
       "name": "@agent-assistant/connectivity",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "nanoid": "^5.1.6"
@@ -3758,7 +3763,7 @@
     },
     "packages/continuation": {
       "name": "@agent-assistant/continuation",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "dependencies": {
         "@agent-assistant/harness": "^0.10.1"
       },
@@ -4025,7 +4030,7 @@
     },
     "packages/coordination": {
       "name": "@agent-assistant/coordination",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "@agent-assistant/connectivity": "^0.2.6",
@@ -4048,7 +4053,7 @@
     },
     "packages/core": {
       "name": "@agent-assistant/core",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "devDependencies": {
         "@agent-assistant/traits": "file:../traits",
         "typescript": "^5.9.3",
@@ -4081,7 +4086,7 @@
     },
     "packages/harness": {
       "name": "@agent-assistant/harness",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "dependencies": {
         "@agent-assistant/connectivity": "^0.2.6",
         "@agent-assistant/coordination": "^0.2.6",
@@ -4249,7 +4254,7 @@
     },
     "packages/inbox": {
       "name": "@agent-assistant/inbox",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "@agent-assistant/turn-context": ">=0.1.0"
@@ -5037,7 +5042,7 @@
     },
     "packages/memory": {
       "name": "@agent-assistant/memory",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "@agent-relay/memory": "^6.0.9",
@@ -5048,9 +5053,18 @@
         "vitest": "^3.2.4"
       }
     },
+    "packages/persona": {
+      "name": "@agent-assistant/persona",
+      "version": "0.1.0",
+      "license": "MIT",
+      "devDependencies": {
+        "typescript": "^5.9.3",
+        "vitest": "^3.2.4"
+      }
+    },
     "packages/policy": {
       "name": "@agent-assistant/policy",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "nanoid": "^5.0.0"
@@ -5062,7 +5076,7 @@
     },
     "packages/proactive": {
       "name": "@agent-assistant/proactive",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "@agent-assistant/coordination": "^0.4.25",
@@ -5085,7 +5099,7 @@
     },
     "packages/sdk": {
       "name": "@agent-assistant/sdk",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "@agent-assistant/core": ">=0.1.0",
@@ -5102,7 +5116,7 @@
     },
     "packages/sessions": {
       "name": "@agent-assistant/sessions",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "devDependencies": {
         "typescript": "^5.9.3",
         "vitest": "^3.2.4"
@@ -5110,7 +5124,7 @@
     },
     "packages/specialists": {
       "name": "@agent-assistant/specialists",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "dependencies": {
         "@agent-assistant/coordination": "^0.2.6",
         "@agent-assistant/vfs": "^0.2.6",
@@ -5149,7 +5163,7 @@
     },
     "packages/surfaces": {
       "name": "@agent-assistant/surfaces",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "devDependencies": {
         "typescript": "^5.9.3",
         "vitest": "^3.2.4"
@@ -5157,7 +5171,7 @@
     },
     "packages/telemetry": {
       "name": "@agent-assistant/telemetry",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "dependencies": {
         "@agent-assistant/harness": "^0.10.1"
       },
@@ -5430,7 +5444,7 @@
     },
     "packages/traits": {
       "name": "@agent-assistant/traits",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "devDependencies": {
         "typescript": "^5.9.3",
@@ -5439,7 +5453,7 @@
     },
     "packages/turn-context": {
       "name": "@agent-assistant/turn-context",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "dependencies": {
         "@agent-assistant/harness": "^0.4.0 || ^0.6.0",
@@ -5599,7 +5613,7 @@
     },
     "packages/vfs": {
       "name": "@agent-assistant/vfs",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "license": "MIT",
       "devDependencies": {
         "@types/node": "^20.0.0",
@@ -5626,7 +5640,7 @@
     },
     "packages/webhook-runtime": {
       "name": "@agent-assistant/webhook-runtime",
-      "version": "0.4.31",
+      "version": "0.4.33",
       "dependencies": {
         "@agent-assistant/specialists": "^0.3.5",
         "@agent-assistant/surfaces": "^0.3.0",
diff --git a/package.json b/package.json
index 0dc9e7f..6175ebd 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
     "packages/vfs",
     "packages/harness",
     "packages/memory",
+    "packages/persona",
     "packages/inbox",
     "packages/continuation",
     "packages/turn-context",
diff --git a/packages/persona/package.json b/packages/persona/package.json
new file mode 100644
index 0000000..cb58235
--- /dev/null
+++ b/packages/persona/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "@agent-assistant/persona",
+  "version": "0.1.0",
+  "description": "Shared persona type contracts for agent assistant services",
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    }
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "prepack": "npm run build",
+    "build": "tsc -p tsconfig.json",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "typecheck": "tsc --noEmit -p tsconfig.json"
+  },
+  "devDependencies": {
+    "typescript": "^5.9.3",
+    "vitest": "^3.2.4"
+  },
+  "license": "MIT"
+}
diff --git a/packages/persona/src/index.ts b/packages/persona/src/index.ts
new file mode 100644
index 0000000..abbb378
--- /dev/null
+++ b/packages/persona/src/index.ts
@@ -0,0 +1,9 @@
+export type {
+  PersonaDefinition,
+  PersonaDeliveryConfig,
+  PersonaExecutor,
+  PersonaMemoryConfig,
+  PersonaTrigger,
+  RouterConfig,
+  SandboxBorrowConfig,
+} from "./types.js";
diff --git a/packages/persona/src/types.test.ts b/packages/persona/src/types.test.ts
new file mode 100644
index 0000000..b48364f
--- /dev/null
+++ b/packages/persona/src/types.test.ts
@@ -0,0 +1,66 @@
+import { describe, expect, it } from "vitest";
+import type { PersonaDefinition } from "./types.js";
+
+describe("persona type contracts", () => {
+  it("supports ephemeral sandbox executors", () => {
+    const persona = {
+      id: "daily-research",
+      displayName: "Daily Research",
+      version: "0.1.0",
+      ownerService: "sage",
+      executor: { kind: "ephemeral-sandbox" },
+      triggers: [{ kind: "cron", cron: "0 9 * * *", timezone: "UTC" }],
+    } satisfies PersonaDefinition;
+
+    expect(persona.executor.kind).toBe("ephemeral-sandbox");
+  });
+
+  it("supports HTTP delegate executors", () => {
+    const persona = {
+      id: "nightcto-triage",
+      displayName: "NightCTO Triage",
+      version: "0.1.0",
+      ownerService: "nightcto",
+      executor: {
+        kind: "http-delegate",
+        router: {
+          endpoint: "https://example.com/personas/nightcto",
+          method: "POST",
+          timeoutMs: 30_000,
+          headers: { "x-persona": "nightcto" },
+        },
+      },
+      triggers: [{ kind: "webhook", provider: "github", event: "issue.opened" }],
+      delivery: { mode: "callback", callbackUrl: "https://example.com/callback" },
+    } satisfies PersonaDefinition;
+
+    expect(persona.executor.kind).toBe("http-delegate");
+  });
+
+  it("supports hybrid executors", () => {
+    const persona = {
+      id: "msd-app-helper",
+      displayName: "MSD App Helper",
+      version: "0.1.0",
+      ownerService: "msd-app",
+      executor: {
+        kind: "hybrid",
+        router: {
+          endpoint: "https://example.com/personas/msd",
+        },
+        sandbox: {
+          snapshot: "persona-msd-base",
+          lifecycle: "warm-pool",
+          ttlSeconds: 600,
+          maxConcurrentBorrows: 3,
+          capabilities: ["repo-read", "browser"],
+        },
+      },
+      triggers: [{ kind: "inbox", channel: "support", event: "message.created" }],
+      memory: { backend: "agent-memory", namespace: "msd-app" },
+      metadata: { tier: "support" },
+    } satisfies PersonaDefinition;
+
+    expect(persona.executor.kind).toBe("hybrid");
+  });
+});
diff --git a/packages/persona/src/types.ts b/packages/persona/src/types.ts
new file mode 100644
index 0000000..5fca299
--- /dev/null
+++ b/packages/persona/src/types.ts
@@ -0,0 +1,48 @@
+export interface RouterConfig {
+  endpoint: string;
+  method?: "POST";
+  timeoutMs?: number;
+  headers?: Record<string, string>;
+}
+
+export interface SandboxBorrowConfig {
+  snapshot: string;
+  lifecycle?: "ephemeral" | "warm-pool";
+  ttlSeconds?: number;
+  maxConcurrentBorrows?: number;
+  capabilities?: string[];
+}
+
+export type PersonaExecutor =
+  | { kind: "ephemeral-sandbox" }
+  | { kind: "http-delegate"; router: RouterConfig }
+  | { kind: "hybrid"; router: RouterConfig; sandbox: SandboxBorrowConfig };
+
+export type PersonaTrigger =
+  | { kind: "cron"; cron: string; timezone?: string; name?: string }
+  | { kind: "webhook"; provider: string; event?: string; path?: string }
+  | { kind: "inbox"; channel?: string; event?: string };
+
+export interface PersonaMemoryConfig {
+  backend?: "agent-memory" | "supermemory" | "none";
+  namespace?: string;
+}
+
+export interface PersonaDeliveryConfig {
+  mode?: "inline" | "callback" | "direct";
+  callbackUrl?: string;
+}
+
+export interface PersonaDefinition {
+  id: string;
+  displayName: string;
+  version: string;
+  description?: string;
+  ownerService?: "sage" | "nightcto" | "msd-app" | "workforce" | (string & {});
+  sourceTag?: string;
+  executor: PersonaExecutor;
+  triggers?: PersonaTrigger[];
+  memory?: PersonaMemoryConfig;
+  delivery?: PersonaDeliveryConfig;
+  metadata?: Record<string, unknown>;
+}
diff --git a/packages/persona/tsconfig.json b/packages/persona/tsconfig.json
new file mode 100644
index 0000000..01a4173
--- /dev/null
+++ b/packages/persona/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "declaration": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "strict": true,
+    "exactOptionalPropertyTypes": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "skipLibCheck": true,
+    "noUncheckedIndexedAccess": true
+  },
+  "include": [
+    "src/**/*.ts"
+  ]
+}