diff --git a/biome.json b/biome.json
index eb60de4..8387b60 100644
--- a/biome.json
+++ b/biome.json
@@ -19,7 +19,7 @@
   },
   "overrides": [
     {
-      "include": ["tsup.config.ts", "*/rslib.config.ts"],
+      "include": ["tsup.config.ts", "*/rslib.config.ts", "packages/khala/src/index.ts"],
       "linter": {
         "rules": {
           "style": {
diff --git a/packages/khala/src/__tests__/result.test.ts b/packages/khala/src/__tests__/result.test.ts
new file mode 100644
index 0000000..b183df5
--- /dev/null
+++ b/packages/khala/src/__tests__/result.test.ts
@@ -0,0 +1,16 @@
+import { describe, it, expect } from "vitest";
+import { ok, err } from "../result.js";
+
+describe("Result", () => {
+  it("ok wraps a value", () => {
+    const r = ok(42);
+    expect(r.ok).toBe(true);
+    if (r.ok) expect(r.value).toBe(42);
+  });
+
+  it("err wraps an error", () => {
+    const r = err("boom");
+    expect(r.ok).toBe(false);
+    if (!r.ok) expect(r.error).toBe("boom");
+  });
+});
diff --git a/packages/khala/src/auth.ts b/packages/khala/src/auth.ts
index 21e23d3..a8e435f 100644
--- a/packages/khala/src/auth.ts
+++ b/packages/khala/src/auth.ts
@@ -33,9 +33,10 @@ export const agentAuth = createMiddleware<{
   return next();
 });
 
-export function requireAdmin(
-  c: { req: { header: (k: string) => string | undefined }; env: KhalaBindings },
-): boolean {
+export function requireAdmin(c: {
+  req: { header: (k: string) => string | undefined };
+  env: KhalaBindings;
+}): boolean {
   const header = c.req.header("Authorization");
   const expected = c.env.ADMIN_SECRET;
   if (expected.length === 0) {
diff --git a/packages/khala/src/db.ts b/packages/khala/src/db.ts
index cc084a8..c49db59 100644
--- a/packages/khala/src/db.ts
+++ b/packages/khala/src/db.ts
@@ -1,7 +1,7 @@
-import { monotonicFactory, type ULID } from "ulidx";
-import type { Agent, GetThreadMessagesOpts, Message, Task, Thread } from "./types.js";
+import { type ULID, monotonicFactory } from "ulidx";
 import type { Result } from "./result.js";
 import { err, ok } from "./result.js";
+import type { Agent, GetThreadMessagesOpts, Message, Task, Thread } from "./types.js";
 
 const generateUlid = monotonicFactory((): number => Date.now());
 
@@ -70,9 +70,7 @@ export async function setThreadResult(
   status: "completed" | "failed",
 ): Promise<void> {
   await db
-    .prepare(
-      `UPDATE threads SET result = ?, status = ?, updated_at = datetime('now') WHERE id = ?`,
-    )
+    .prepare(`UPDATE threads SET result = ?, status = ?, updated_at = datetime('now') WHERE id = ?`)
     .bind(result, status, id)
     .run();
 }
@@ -98,9 +96,7 @@ export async function appendMessage(
     .bind(threadId, role, content, meta, step, agentId)
     .run();
   const row = await db
-    .prepare(
-      `SELECT * FROM messages WHERE thread_id = ? AND step = ? ORDER BY id DESC LIMIT 1`,
-    )
+    .prepare("SELECT * FROM messages WHERE thread_id = ? AND step = ? ORDER BY id DESC LIMIT 1")
     .bind(threadId, step)
     .first<MessageRow>();
   if (!row) {
@@ -219,7 +215,10 @@ type TaskRow = {
 
 function rowToTask(row: TaskRow): Task {
   const status =
-    row.status === "open" || row.status === "claimed" || row.status === "completed" || row.status === "expired"
+    row.status === "open" ||
+    row.status === "claimed" ||
+    row.status === "completed" ||
+    row.status === "expired"
       ? row.status
       : "open";
   return {
@@ -265,7 +264,11 @@ export async function getTaskById(db: D1Database, id: string): Promise<Task | nu
   return rowToTask(row);
 }
 
-export async function completeTask(db: D1Database, taskId: string, claimId: string): Promise<boolean> {
+export async function completeTask(
+  db: D1Database,
+  taskId: string,
+  claimId: string,
+): Promise<boolean> {
   const res = await db
     .prepare(
       `UPDATE tasks SET status = 'completed' WHERE id = ? AND claim_id = ? AND status = 'claimed'`,
@@ -277,7 +280,11 @@ export async function completeTask(db: D1Database, taskId: string, claimId: stri
   return res.success === true;
 }
 
-export async function releaseTask(db: D1Database, taskId: string, claimId: string): Promise<boolean> {
+export async function releaseTask(
+  db: D1Database,
+  taskId: string,
+  claimId: string,
+): Promise<boolean> {
   const res = await db
     .prepare(
       `UPDATE tasks
@@ -314,9 +321,7 @@ export async function getOpenTasks(
   const cap = Math.min(500, Math.max(1, limit));
   if (workflow === null) {
     const st = await db
-      .prepare(
-        `SELECT t.* FROM tasks t WHERE t.status = 'open' ORDER BY t.created_at ASC LIMIT ?`,
-      )
+      .prepare(`SELECT t.* FROM tasks t WHERE t.status = 'open' ORDER BY t.created_at ASC LIMIT ?`)
       .bind(cap)
       .all<TaskRow>();
     const results = (st.results as TaskRow[] | null) ?? [];
@@ -350,10 +355,7 @@ export async function registerAgent(
     .prepare("INSERT INTO agents (id, token_hash, created_at) VALUES (?, ?, datetime('now'))")
     .bind(id, tokenHash)
     .run();
-  const row = await db
-    .prepare("SELECT * FROM agents WHERE id = ?")
-    .bind(id)
-    .first<Agent>();
+  const row = await db.prepare("SELECT * FROM agents WHERE id = ?").bind(id).first<Agent>();
   if (!row) return err("registerAgent: insert failed");
   return ok(row);
 }
diff --git a/packages/khala/src/index.ts b/packages/khala/src/index.ts
index 6dd081f..02d3383 100644
--- a/packages/khala/src/index.ts
+++ b/packages/khala/src/index.ts
@@ -1,18 +1,17 @@
 import { Hono } from "hono";
+import { agentAuth } from "./auth.js";
+import {
+  claimTask,
+  createThread,
+  expireTimedOutTasks,
+  getOpenTasks,
+  getTaskById,
+  getThread,
+  releaseTask,
+} from "./db.js";
 import type { KhalaBindings } from "./env.js";
 import { admin } from "./routes/admin.js";
-import { agentAuth } from "./auth.js";
 import { ThreadDO } from "./thread-do.js";
-import {
-  createThread,
-  getThread,
-  getThreadMessages,
-  getOpenTasks,
-  claimTask,
-  releaseTask,
-  getTaskById,
-  expireTimedOutTasks,
-} from "./db.js";
 import { getWorkflow } from "./workflows.js";
 
 // Register built-in workflows
diff --git a/packages/khala/src/routes/admin.ts b/packages/khala/src/routes/admin.ts
index 8f0bc57..1e231ca 100644
--- a/packages/khala/src/routes/admin.ts
+++ b/packages/khala/src/routes/admin.ts
@@ -1,8 +1,8 @@
 import { Hono } from "hono";
 import { requireAdmin, sha256Hex } from "../auth.js";
-import { registerAgent, deleteAgent, listAgents } from "../db.js";
-import type { Result } from "../result.js";
+import { deleteAgent, listAgents, registerAgent } from "../db.js";
 import type { KhalaBindings } from "../env.js";
+import type { Result } from "../result.js";
 
 const admin = new Hono<{ Bindings: KhalaBindings }>();
 
@@ -32,7 +32,12 @@ admin.post("/agents", async (c) => {
   const body = raw as Readonly<Record<string, unknown>>;
   const id = body.id;
   const token = body.token;
-  if (typeof id !== "string" || id.length === 0 || typeof token !== "string" || token.length === 0) {
+  if (
+    typeof id !== "string" ||
+    id.length === 0 ||
+    typeof token !== "string" ||
+    token.length === 0
+  ) {
     return c.json({ error: "id and token required" }, 400);
   }
   const hash = await sha256Hex(token);
diff --git a/packages/khala/src/thread-do.ts b/packages/khala/src/thread-do.ts
index 3c4b8c4..9f5f187 100644
--- a/packages/khala/src/thread-do.ts
+++ b/packages/khala/src/thread-do.ts
@@ -34,13 +34,15 @@ function buildSteps(msgs: Awaited<ReturnType<typeof getThreadMessages>>): StepRo
     .map((m) => ({
       role: m.role,
       content: m.content,
-      meta: m.meta ? (() => {
-        try {
-          return JSON.parse(m.meta) as unknown;
-        } catch {
-          return m.meta;
-        }
-      })() : null,
+      meta: m.meta
+        ? (() => {
+            try {
+              return JSON.parse(m.meta) as unknown;
+            } catch {
+              return m.meta;
+            }
+          })()
+        : null,
     }));
 }
 
@@ -118,8 +120,16 @@ export class ThreadDO {
     const content = body.content;
     const claimId = body.claimId;
     const agentId = body.agentId;
-    if (typeof taskId !== "string" || typeof content !== "string" || typeof claimId !== "string" || typeof agentId !== "string") {
-      return Response.json({ error: "taskId, content, claimId, agentId required" }, { status: 400 });
+    if (
+      typeof taskId !== "string" ||
+      typeof content !== "string" ||
+      typeof claimId !== "string" ||
+      typeof agentId !== "string"
+    ) {
+      return Response.json(
+        { error: "taskId, content, claimId, agentId required" },
+        { status: 400 },
+      );
     }
     const db = this.env.DB;
     const task = await getTaskForThreadAndClaim(db, threadId, taskId, claimId);
@@ -157,10 +167,7 @@ export class ThreadDO {
     return Response.json({ ok: true });
   }
 
-  private async listMessages(
-    url: URL,
-    threadId: string,
-  ): Promise<Response> {
+  private async listMessages(url: URL, threadId: string): Promise<Response> {
     const roleP = url.searchParams.get("role");
     const minStepRaw = url.searchParams.get("minStep");
     const maxStepRaw = url.searchParams.get("maxStep");
diff --git a/packages/khala/worker-configuration.d.ts b/packages/khala/worker-configuration.d.ts
index 0c14531..ee83009 100644
--- a/packages/khala/worker-configuration.d.ts
+++ b/packages/khala/worker-configuration.d.ts
@@ -13,5 +13,3 @@ declare module "cloudflare:workers" {
   }
   interface ProvidedEnv extends Env {}
 }
-
-export {};