fix(coding-agent): disambiguate resource paths

packages/coding-agent/src/utils/paths.ts

@@ -1,4 +1,5 @@
 import { realpathSync } from "node:fs";
+import { isAbsolute, relative, resolve as resolvePath, sep } from "node:path";
 
 /**
  * Resolve a path to its canonical (real) form, following symlinks.
@@ -34,3 +35,23 @@ export function isLocalPath(value: string): boolean {
 	}
 	return true;
 }
+
+function resolveAgainstCwd(filePath: string, cwd: string): string {
+	return isAbsolute(filePath) ? resolvePath(filePath) : resolvePath(cwd, filePath);
+}
+
+export function getCwdRelativePath(filePath: string, cwd: string): string | undefined {
+	const resolvedCwd = resolvePath(cwd);
+	const resolvedPath = resolveAgainstCwd(filePath, resolvedCwd);
+	const relativePath = relative(resolvedCwd, resolvedPath);
+	const isInsideCwd =
+		relativePath === "" ||
+		(relativePath !== ".." && !relativePath.startsWith(`..${sep}`) && !isAbsolute(relativePath));
+
+	return isInsideCwd ? relativePath || "." : undefined;
+}
+
+export function formatPathRelativeToCwdOrAbsolute(filePath: string, cwd: string): string {
+	const absolutePath = resolveAgainstCwd(filePath, cwd);
+	return (getCwdRelativePath(absolutePath, cwd) ?? absolutePath).split(sep).join("/");
+}