diff --git a/agents/designer/README.md b/agents/designer/README.md
new file mode 100644
index 000000000..a51f804d0
--- /dev/null
+++ b/agents/designer/README.md
@@ -0,0 +1,35 @@
+# @corbits/code-agent-designer
+
+## What this is
+
+Ready `@corbits/code-agent-designer` agent + independently importable components:
+`agent`, `defineAgent`, `director`, `tools`, `systemPrompt`, `config`.
+
+## Consume (runLocal)
+
+```ts
+import { agent } from "@corbits/code-agent-designer";
+const run = runLocal(defining(agent), env);
+```
+
+## Consume (deploy runWorkflow / hub / sidecar)
+
+Hand the same `AgentDefinition` to a workflow — the package never exports a
+workflow itself.
+
+## Remix components
+
+```ts
+import { director, tools, systemPrompt, config } from "@corbits/code-agent-designer";
+defineAgent({ director, ... }); // or swap tools / systemPrompt / config
+```
+
+Each of `director`, `tools`, `systemPrompt`, and `config` is a named,
+independently importable part.
+
+## Single authority
+
+`prompt.ts` `systemPrompt.build()` is byte-stable (the raw card, no formatting).
+`toolset.ts` `tools` literal equals the `REVIEW_TOOLS` surface constant in
+`src/agent/directors/tool-sets.ts`; drift is enforced by the in-tree drift-guard
+`src/agent/directors/designer/package.test.ts`.
diff --git a/agents/designer/package.json b/agents/designer/package.json
new file mode 100644
index 000000000..2779dd051
--- /dev/null
+++ b/agents/designer/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "@corbits/code-agent-designer",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "license": "SEE LICENSE IN LICENSE.md",
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "default": "./src/index.ts"
+    }
+  }
+}
diff --git a/agents/designer/src/agent.ts b/agents/designer/src/agent.ts
new file mode 100644
index 000000000..186d24e33
--- /dev/null
+++ b/agents/designer/src/agent.ts
@@ -0,0 +1,17 @@
+import {
+  defineAgent as coreDefineAgent,
+  type AgentDefinition,
+} from "@intx/agent";
+import { systemPrompt } from "./prompt.js";
+
+export const agent: AgentDefinition = defineAgent();
+
+export function defineAgent(): AgentDefinition {
+  return coreDefineAgent({
+    id: "designer",
+    systemPrompt: systemPrompt.build(),
+    tools: [], // tool mounting is consumer/app-side; surface enforced by drift-guard
+    capabilities: [],
+    inference: { sources: [] },
+  });
+}
diff --git a/agents/designer/src/config.ts b/agents/designer/src/config.ts
new file mode 100644
index 000000000..7080c5b82
--- /dev/null
+++ b/agents/designer/src/config.ts
@@ -0,0 +1,9 @@
+export const config = {
+  spawn: { maySpawn: false },
+  tier: "leaf",
+  modelRole: "implement",
+} as const satisfies {
+  spawn: { maySpawn: boolean };
+  tier: string;
+  modelRole: string;
+};
diff --git a/agents/designer/src/director.ts b/agents/designer/src/director.ts
new file mode 100644
index 000000000..214116ace
--- /dev/null
+++ b/agents/designer/src/director.ts
@@ -0,0 +1,22 @@
+import { tools } from "./toolset.js";
+import { systemPrompt } from "./prompt.js";
+import { config } from "./config.js";
+
+export const director = {
+  id: "designer",
+  primaryIntent:
+    "Own DESIGN.md create/use, design tokens, UI styling, and impeccable.style design engineering",
+  outOfLane: [
+    "backend architecture and database schema design",
+    "general backend code defect review",
+    "marketing publish campaigns",
+    "orchestrating or spawning other agents",
+  ],
+  description:
+    "UI/UX designer — owns DESIGN.md, impeccable style design laws, tokens, and interface polish",
+  systemPrompt: systemPrompt.build(),
+  tools: { allow: [...tools] },
+  spawn: config.spawn,
+  tier: config.tier,
+  modelRole: config.modelRole,
+} as const;
diff --git a/agents/designer/src/index.ts b/agents/designer/src/index.ts
new file mode 100644
index 000000000..c2c15f6c6
--- /dev/null
+++ b/agents/designer/src/index.ts
@@ -0,0 +1,5 @@
+export { agent, defineAgent } from "./agent.js";
+export { director } from "./director.js";
+export { tools } from "./toolset.js";
+export { systemPrompt } from "./prompt.js";
+export { config } from "./config.js";
diff --git a/src/agent/directors/designer/package.ts b/agents/designer/src/prompt.ts
similarity index 67%
rename from src/agent/directors/designer/package.ts
rename to agents/designer/src/prompt.ts
index a3f73f68e..8b9dbe405 100644
--- a/src/agent/directors/designer/package.ts
+++ b/agents/designer/src/prompt.ts
@@ -1,28 +1,5 @@
-import type { DirectorPackage } from "../types.js";
-import { BUILD_TOOLS } from "../tool-sets.js";
-
-/**
- * Designer worker: UI/UX design engineering specialist.
- * Owns DESIGN.md creation and updates, impeccable.style design laws,
- * design tokens, typography, spatial layout, and micro-interaction polish.
- */
-export const designerPackage: DirectorPackage = {
-  id: "designer",
-  primaryIntent:
-    "Own DESIGN.md create/use, design tokens, UI styling, and impeccable.style design engineering",
-  outOfLane: [
-    "backend architecture and database schema design",
-    "general backend code defect review",
-    "marketing publish campaigns",
-    "orchestrating or spawning other agents",
-  ],
-  description:
-    "UI/UX designer — owns DESIGN.md, impeccable style design laws, tokens, and interface polish",
-  tools: { allow: BUILD_TOOLS },
-  spawn: { maySpawn: false },
-  tier: "leaf",
-  modelRole: "implement",
-  systemPrompt: `You are DesignerDirector (Designer), a specialist in Corbits Code.
+// Designer card. Byte-stable build, single prompt authority.
+const CARD = `You are DesignerDirector (Designer), a specialist in Corbits Code.
 
 PRIMARY INTENT: own interface design, design tokens, styling, and DESIGN.md. You bring design engineering excellence to UI surfaces — layout rhythm, typography, purposeful motion, responsive states, and cohesive design systems.
 
@@ -44,5 +21,11 @@ Workflow:
 3. Verify visual hierarchy, component responsiveness, and state handling (hover, focus, disabled, active, error).
 4. Report changes with Summary / Findings / Blockers / Paths.
 
-OUT OF LANE: backend business logic or database migrations, general backend defect review, marketing content pipelines, fleet orchestration.`,
+OUT OF LANE: backend business logic or database migrations, general backend defect review, marketing content pipelines, fleet orchestration.`;
+
+export const theme = "designer";
+
+export const systemPrompt = {
+  theme,
+  build: (): string => CARD,
 };
diff --git a/agents/designer/src/toolset.ts b/agents/designer/src/toolset.ts
new file mode 100644
index 000000000..03d33ce03
--- /dev/null
+++ b/agents/designer/src/toolset.ts
@@ -0,0 +1,17 @@
+// BUILD_TOOLS literal (= REVIEW_TOOLS); drift-guarded against REVIEW_TOOLS
+// by src/agent/directors/designer/package.test.ts.
+export const tools = [
+  "read_file",
+  "grep",
+  "search_files",
+  "list_dir",
+  "lsp",
+  "run_shell",
+  "web_fetch",
+  "web_search",
+  "skill_search",
+  "use_skill",
+  "write_file",
+  "edit_file",
+  "delete_file",
+] as const;
diff --git a/agents/designer/tsconfig.json b/agents/designer/tsconfig.json
new file mode 100644
index 000000000..0d7100cbc
--- /dev/null
+++ b/agents/designer/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "noEmit": true
+  },
+  "include": ["src/**/*.ts"]
+}
diff --git a/bun.lock b/bun.lock
index 46e1bed4f..48ffba2f1 100644
--- a/bun.lock
+++ b/bun.lock
@@ -68,6 +68,10 @@
       "name": "@corbits/code-agent-warden",
       "version": "0.1.0",
     },
+    "agents/designer": {
+      "name": "@corbits/code-agent-designer",
+      "version": "0.1.0",
+    },
     "packages/first-class-providers": {
       "name": "@corbits/first-class-providers",
       "version": "0.1.0",
@@ -264,6 +268,7 @@
     "@corbits/code-agent-prober": ["@corbits/code-agent-prober@workspace:agents/prober"],
     "@corbits/code-agent-dispatch": ["@corbits/code-agent-dispatch@workspace:agents/dispatch"],
     "@corbits/code-agent-warden": ["@corbits/code-agent-warden@workspace:agents/warden"],
+    "@corbits/code-agent-designer": ["@corbits/code-agent-designer@workspace:agents/designer"],
 
     "@corbits/codex-provider": ["@corbits/codex-provider@0.1.1", "", { "dependencies": { "arktype": "^2.2.3" }, "peerDependencies": { "@corbits/oauth-core": "^0.2.0", "@corbits/openai-responses": "^0.2.0", "@intx/inference": "^0.4.0", "@intx/types": "^0.4.0" } }, "sha512-MiGA5djQNtRpHqLvJAGdFgHEbUl808AbveMPwt7krLjOH0i20DyElpitHPZF3ltCXkFMhcKIoyTAEpRDqeB/Rw=="],
 
diff --git a/package.json b/package.json
index c427a0851..51e2ff5d6 100644
--- a/package.json
+++ b/package.json
@@ -108,7 +108,8 @@
     "@modelcontextprotocol/sdk": "^1.29.0",
     "@opentui/core": "0.5.12",
     "arktype": "catalog:",
-    "isomorphic-git": "catalog:"
+    "isomorphic-git": "catalog:",
+    "@corbits/code-agent-designer": "workspace:*"
   },
   "devDependencies": {
     "@intx/inference-testing": "0.3.0",
diff --git a/scripts/dead-export-allowlist.txt b/scripts/dead-export-allowlist.txt
index 0c6bcaf8f..21d45e8b3 100644
--- a/scripts/dead-export-allowlist.txt
+++ b/scripts/dead-export-allowlist.txt
@@ -51,6 +51,14 @@ agents/warden/src/index.ts: agent
 agents/warden/src/index.ts: defineAgent
 agents/warden/src/config.ts: satisfies
 agents/warden/src/config.ts: boolean
+agents/designer/src/index.ts: agent
+agents/designer/src/index.ts: defineAgent
+agents/designer/src/index.ts: director
+agents/designer/src/index.ts: tools
+agents/designer/src/index.ts: systemPrompt
+agents/designer/src/index.ts: config
+agents/designer/src/config.ts: satisfies
+agents/designer/src/config.ts: boolean
 
 # Versioned prompt-variance package public surface (CL-8269 lane,
 # agent-owned). Family rows data re-exported through the package entry point;
diff --git a/src/agent/directors/designer/package.test.ts b/src/agent/directors/designer/package.test.ts
new file mode 100644
index 000000000..9b3aaa94e
--- /dev/null
+++ b/src/agent/directors/designer/package.test.ts
@@ -0,0 +1,49 @@
+import { describe, expect, test } from "bun:test";
+
+import {
+  director,
+  tools,
+  config,
+  systemPrompt,
+} from "@corbits/code-agent-designer";
+import { REVIEW_TOOLS } from "../tool-sets.js";
+import { DIRECTOR_REGISTRY } from "../registry.js";
+import type { DirectorPackage } from "../types.js";
+
+describe("designerPackage", () => {
+  test("workspace package satisfies the director contract and feeds the registry", () => {
+    const asDirector: DirectorPackage = director;
+    expect(asDirector.id).toBe("designer");
+    expect(DIRECTOR_REGISTRY.designer).toBe(director);
+    expect([...director.tools.allow]).toEqual([...REVIEW_TOOLS]);
+    expect(new Set(director.tools.allow).size).toBe(
+      director.tools.allow.length,
+    );
+  });
+
+  test("spawn/tier/modelRole match config", () => {
+    expect(director.spawn).toEqual(config.spawn);
+    expect(director.tier).toBe(config.tier);
+    expect(director.modelRole).toBe(config.modelRole);
+    expect(director.spawn.maySpawn).toBe(false);
+    expect(director.tier).toBe("leaf");
+    expect(director.modelRole).toBe("implement");
+  });
+
+  test("prompt authority is byte-stable", () => {
+    expect(director.systemPrompt).toBe(systemPrompt.build());
+    expect(systemPrompt.build()).toBe(systemPrompt.build());
+  });
+
+  test("tools surface matches REVIEW_TOOLS and is leaf-scoped", () => {
+    expect([...tools]).toEqual([...REVIEW_TOOLS]);
+    expect(tools).not.toContain("spawn_agent");
+    expect(tools).not.toContain("ask_operator");
+    expect(tools).not.toContain("wait_agents");
+    expect(tools).not.toContain("search_agents");
+  });
+
+  test("tools allowlist has no duplicates", () => {
+    expect(new Set([...tools]).size).toBe(tools.length);
+  });
+});
diff --git a/src/agent/directors/registry.ts b/src/agent/directors/registry.ts
index ddf5fc0b3..f3e6adbdf 100644
--- a/src/agent/directors/registry.ts
+++ b/src/agent/directors/registry.ts
@@ -2,10 +2,10 @@ import { director as shakespeareDirector } from "@corbits/code-agent-shakespeare
 import { director as proberDirector } from "@corbits/code-agent-prober";
 import { director as dispatchDirector } from "@corbits/code-agent-dispatch";
 import { director as wardenDirector } from "@corbits/code-agent-warden";
+import { director as designerDirector } from "@corbits/code-agent-designer";
 import type { AgentProfile, CapabilityFilter } from "../profile-types.js";
 import { director as artistDirector } from "@corbits/code-agent-artist";
 import { coderPackage } from "./coder/package.js";
-import { designerPackage } from "./designer/package.js";
 import { explorerPackage } from "./explorer/package.js";
 import { plannerPackage } from "./planner/package.js";
 import { qaLeadPackage } from "./qa-lead/package.js";
@@ -42,7 +42,7 @@ export const DIRECTOR_REGISTRY: Readonly<Record<DirectorId, DirectorPackage>> =
     planner: plannerPackage,
     coder: coderPackage,
     reviewer: reviewerPackage,
-    designer: designerPackage,
+    designer: designerDirector,
     artist: artistDirector,
     warden: wardenDirector,
     shakespeare: shakespeareDirector,
diff --git a/tsconfig.json b/tsconfig.json
index 10efbac6e..31455b6e4 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,6 +10,7 @@
       "@corbits/code-agent-prober": ["./agents/prober/src/index.ts"],
       "@corbits/code-agent-dispatch": ["./agents/dispatch/src/index.ts"],
       "@corbits/code-agent-warden": ["./agents/warden/src/index.ts"],
+      "@corbits/agent-designer": ["./agents/designer/src/index.ts"],
       "@corbits/provider-opencode-go": ["./packages/opencode-go/src/index.ts"],
       "@corbits/first-class-providers": [
         "./packages/first-class-providers/src/index.ts"