From 7382437eee63545c772ed1921672ba234eca4d25 Mon Sep 17 00:00:00 2001
From: tt-a1i <53142663+tt-a1i@users.noreply.github.com>
Date: Sat, 20 Jun 2026 17:07:58 +0800
Subject: [PATCH] fix(core): allow dot-prefixed plans directories

---
 packages/core/src/config/storage.test.ts |  6 ++++++
 packages/core/src/config/storage.ts      | 16 +++++++++++-----
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/packages/core/src/config/storage.test.ts b/packages/core/src/config/storage.test.ts
index b81278e1554..160bcb74f4a 100644
--- a/packages/core/src/config/storage.test.ts
+++ b/packages/core/src/config/storage.test.ts
@@ -219,6 +219,12 @@ describe('Storage – getPlansDir', () => {
     );
   });
 
+  it('allows project subdirectories whose names start with two dots', () => {
+    expect(Storage.getPlansDir(projectRoot, './..plans')).toBe(
+      path.join(projectRoot, '..plans'),
+    );
+  });
+
   it('expands tilde in configured plansDirectory values', () => {
     const projectInHome = path.join(os.homedir(), 'workspace', 'project');
     expect(
diff --git a/packages/core/src/config/storage.ts b/packages/core/src/config/storage.ts
index e7bf967bee4..e47ae7a7d5f 100644
--- a/packages/core/src/config/storage.ts
+++ b/packages/core/src/config/storage.ts
@@ -23,6 +23,16 @@ const PLANS_DIR_NAME = 'plans';
 const DEBUG_DIR_NAME = 'debug';
 const ARENA_DIR_NAME = 'arena';
 
+function isResolvedPathWithinDirectory(childPath: string, parentPath: string) {
+  const relativePath = path.relative(parentPath, childPath);
+  return (
+    relativePath === '' ||
+    (!relativePath.startsWith(`..${path.sep}`) &&
+      relativePath !== '..' &&
+      !path.isAbsolute(relativePath))
+  );
+}
+
 export class Storage {
   private readonly targetDir: string;
 
@@ -233,11 +243,7 @@ export class Storage {
     const realParent = Storage.resolvePathThroughExistingAncestor(parentPath);
     const realChild = Storage.resolvePathThroughExistingAncestor(childPath);
 
-    const relativePath = path.relative(realParent, realChild);
-    return (
-      relativePath === '' ||
-      (!relativePath.startsWith('..') && !path.isAbsolute(relativePath))
-    );
+    return isResolvedPathWithinDirectory(realChild, realParent);
   }
 
   static assertPathWithinDirectory(