Compat fix workspace grep globs

tests/test_builder_prompt.py

@@ -10,6 +10,7 @@ from agent_builder.builder import (
     _build_project_backend,
     _builder_skill_files,
     _with_builder_skills,
+    _workspace_backend_with_grep_compat,
 )
 from agent_builder.config import Settings
 from agent_builder.tools import A2A_PACK_MIN_VERSION, _strip_unsupported_pricing_fields
@@ -209,3 +210,49 @@ inline = Pricing(price_per_call_usd=0.01, compute={"runtime_seconds": 600}, tota
             backend.artifacts_root,
             "/agents/svgwrite-agent/.agent-builder",
         )
+
+    def test_project_backend_grep_compat_qualifies_relative_glob(self) -> None:
+        class _LegacyBackend:
+            def __init__(self, workspace: object) -> None:
+                self.workspace = workspace
+                self.calls: list[tuple[str | None, str | None]] = []
+
+            def _norm(self, path: str | None) -> str:
+                return (path or "").strip("/")
+
+            def grep(
+                self,
+                pattern: str,
+                path: str | None = None,
+                glob: str | None = None,
+            ):
+                self.calls.append((path, glob))
+                matches = (
+                    [{"path": "/agents/github-repo-inspector/agent.py"}]
+                    if glob == "agents/github-repo-inspector/agent.py"
+                    else []
+                )
+                return type("GrepResult", (), {"error": None, "matches": matches})()
+
+        backend = _workspace_backend_with_grep_compat(_LegacyBackend, object())
+
+        result = backend.grep(
+            "_github_client",
+            path="/agents/github-repo-inspector",
+            glob="agent.py",
+        )
+
+        self.assertEqual(
+            backend.calls,
+            [
+                ("/agents/github-repo-inspector", "agent.py"),
+                (
+                    "/agents/github-repo-inspector",
+                    "agents/github-repo-inspector/agent.py",
+                ),
+            ],
+        )
+        self.assertEqual(
+            result.matches,
+            [{"path": "/agents/github-repo-inspector/agent.py"}],
+        )