diff --git a/packages/cli/package.json b/packages/cli/package.json
index c0597808..efbeb9d0 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@openrouter/spawn",
-  "version": "0.30.3",
+  "version": "0.30.4",
   "type": "module",
   "bin": {
     "spawn": "cli.js"
diff --git a/packages/cli/src/__tests__/unknown-flags.test.ts b/packages/cli/src/__tests__/unknown-flags.test.ts
index a54db2a3..169180b2 100644
--- a/packages/cli/src/__tests__/unknown-flags.test.ts
+++ b/packages/cli/src/__tests__/unknown-flags.test.ts
@@ -228,6 +228,7 @@ describe("KNOWN_FLAGS completeness", () => {
       "--config",
       "--steps",
       "--fast",
+      "--flat",
       "--user",
       "-u",
       "--yes",
diff --git a/packages/cli/src/flags.ts b/packages/cli/src/flags.ts
index 470f86cf..71b46181 100644
--- a/packages/cli/src/flags.ts
+++ b/packages/cli/src/flags.ts
@@ -36,6 +36,7 @@ export const KNOWN_FLAGS = new Set([
   "--config",
   "--steps",
   "--fast",
+  "--flat",
   "--user",
   "-u",
   "--yes",