fix(advisor): avoid ancestor walks for child repos

packages/coding-agent/src/utils/active-repo-context.ts

@@ -88,15 +88,32 @@ function resolveDirectChildDirectorySync(cwd: string, entry: fs.Dirent): string
 	}
 }
 
+async function hasGitMarker(childPath: string): Promise<boolean> {
+	try {
+		const stat = await fsPromises.stat(path.join(childPath, ".git"));
+		return stat.isDirectory() || stat.isFile();
+	} catch {
+		return false;
+	}
+}
+
+function hasGitMarkerSync(childPath: string): boolean {
+	try {
+		const stat = fs.statSync(path.join(childPath, ".git"));
+		return stat.isDirectory() || stat.isFile();
+	} catch {
+		return false;
+	}
+}
+
 async function findSingleDirectChildRepo(cwd: string): Promise<ActiveRepoContext | null> {
 	let context: ActiveRepoContext | null = null;
 	for (const entry of await readDirectChildren(cwd)) {
 		const childPath = await resolveDirectChildDirectory(cwd, entry);
 		if (!childPath) continue;
-		const repository = await resolveRepository(childPath);
-		if (!repository || path.resolve(repository.repoRoot) !== path.resolve(childPath)) continue;
+		if (!(await hasGitMarker(childPath))) continue;
 		if (context) return null;
-		context = buildContext(cwd, repository.repoRoot);
+		context = buildContext(cwd, childPath);
 	}
 	return context;
 }
@@ -106,10 +123,9 @@ function findSingleDirectChildRepoSync(cwd: string): ActiveRepoContext | null {
 	for (const entry of readDirectChildrenSync(cwd)) {
 		const childPath = resolveDirectChildDirectorySync(cwd, entry);
 		if (!childPath) continue;
-		const repository = resolveRepositorySync(childPath);
-		if (!repository || path.resolve(repository.repoRoot) !== path.resolve(childPath)) continue;
+		if (!hasGitMarkerSync(childPath)) continue;
 		if (context) return null;
-		context = buildContext(cwd, repository.repoRoot);
+		context = buildContext(cwd, childPath);
 	}
 	return context;
 }

packages/coding-agent/test/git-active-context.test.ts

@@ -9,6 +9,8 @@ import {
 	resolveActiveRepoContextSync,
 } from "@oh-my-pi/pi-coding-agent/utils/active-repo-context";
 
+const itWithSymlinkPrivilege = process.platform === "win32" ? it.skip : it;
+
 function createGitDirectory(repoRoot: string): void {
 	const gitDir = path.join(repoRoot, ".git");
 	fs.mkdirSync(gitDir, { recursive: true });
@@ -74,7 +76,7 @@ describe("resolveActiveRepoContext", () => {
 		await expectResolvers(cwd, expected);
 	});
 
-	it("treats a direct child symlink to a repository directory as that child", async () => {
+	itWithSymlinkPrivilege("treats a direct child symlink to a repository directory as that child", async () => {
 		const cwd = path.join(tempRoot, "workspace");
 		const targetRoot = path.join(tempRoot, "target-repo");
 		const repoRoot = path.join(cwd, "linked-repo");