Dev

run_rag_verification.py

@@ -651,6 +651,28 @@ def build_question_command(
         argv.append(prompt)
     return argv
 
+
+def build_builder_command(
+    *,
+    builder: Path,
+    index_key: str,
+    pdf_dir: Path,
+    chunks_dir: Path,
+    index_dir: Path,
+) -> list[str]:
+    """Construct the lc_build_index command for the verification run."""
+
+    return [
+        *script_base_command(builder),
+        index_key,
+        "--input-dir",
+        str(pdf_dir),
+        "--chunks-dir",
+        str(chunks_dir),
+        "--index-dir",
+        str(index_dir),
+    ]
+
 
 def build_builder_command(
     *,
@@ -873,6 +895,7 @@ def _append_flag(script_path: Path, args: list[str], candidates: list[str], valu
 
     if not use_multi:
         base_args: List[str] = []
+
         _append_flag(asker, base_args, ["--key"], index_key)
         _append_flag(asker, base_args, ["--index-dir", "--index"], str(index_dir))
         _append_flag(asker, base_args, ["--chunks-dir"], str(chunks_dir))
@@ -888,6 +911,7 @@ def _append_flag(script_path: Path, args: list[str], candidates: list[str], valu
                 command.extend([topk_flag, str(topk)])
     else:
         base_args: list[str] = []
+
         _append_flag(multi, base_args, ["--key", "-k"], index_key)
         _append_flag(multi, base_args, ["--index-dir", "--index"], str(index_dir))
 

src/langchain/lc_ask.py

@@ -27,6 +27,7 @@
 
 from src.langchain.retriever_factory import make_retriever
 from src.langchain.trace import configure_emitter
+
 _FAISS_DIR_PATTERN = re.compile(r"^faiss_(?P<key>.+?)__(?P<embed>.+)$")
 
 
@@ -53,6 +54,9 @@ def _infer_key_from_faiss_dir(path: Path) -> str | None:
 MODES_REQUIRING_CHUNKS = {"bm25", "hybrid", "parent", "hybrid+compression"}
 
 
+ROOT = project_root
+
+
 def _resolve_paths(
     key: str,
     embed_model: str,
@@ -248,7 +252,6 @@ def main():
         help="Question to ask (overrides positional QUESTION)",
     )
     parser.add_argument("--json", dest="json_path", help="JSON job file containing 'question'")
-
     key_group = parser.add_mutually_exclusive_group(required=True)
     key_group.add_argument("--key", help="collection key used at index time")
     key_group.add_argument(
@@ -257,6 +260,7 @@ def main():
 
         help="Path to FAISS index directory (faiss_<key>__<embed_model>)",
     )
+
     parser.add_argument("--embed-model", default="BAAI/bge-small-en-v1.5")
 
     parser.add_argument(
@@ -330,7 +334,6 @@ def main():
     index_dir = Path(args.index_dir).expanduser()
 
     docs: list[Document] | None = None
-
     key_safe: str | None = _fs_safe(args.key) if args.key else None
 
     key_arg = args.key
@@ -343,11 +346,15 @@ def main():
     )
 
     # Prefer a repacked/merged index if available
-
     faiss_dir: Path | None = None
     expected_chunks: Path | None = None
+
+    for cand in (repacked_dir, base_dir):
+        if (cand / "index.faiss").exists():
+            faiss_dir = cand
+            break
 
-    if args.index_path:
+   if args.index_path:
         faiss_dir = Path(args.index_path).expanduser()
         if not faiss_dir.exists():
             raise SystemExit(f"[lc_ask] FAISS dir not found: {faiss_dir}")
@@ -390,9 +397,11 @@ def main():
                 f"  • Or rebuild the index: python src/langchain/lc_build_index.py {args.key}"
             )
 
+
     if faiss_dir is None:
         raise SystemExit("[lc_ask] Unable to resolve FAISS directory")
 
+
     chunks_path = _locate_chunks_file(
         explicit_path=args.chunks_file,
         chunks_dir=chunks_dir,
@@ -402,6 +411,7 @@ def main():
     if chunks_path is not None:
         docs = _load_chunks_jsonl(chunks_path)
 
+
     elif args.mode in MODES_REQUIRING_CHUNKS:
        raise SystemExit(
             f"[lc_ask] chunks not found: {expected_chunks} – run lc_build_index for KEY={args.key}"

tests/unit/test_run_rag_verification.py

@@ -50,6 +50,9 @@ def test_build_builder_command_targets_pdf_and_chunks(tmp_path: Path) -> None:
         index_dir=index_dir,
     )
 
+
+    assert command[:2] == [sys.executable, str(builder)]
+
     assert command[0] == sys.executable
     assert command[1:3] == ["-m", "src.langchain.lc_build_index"]
     assert "--input-dir" in command
@@ -81,6 +84,7 @@ def test_build_question_invocation_for_asker_uses_key_and_index(tmp_path: Path)
     )
 
     assert route == "asker"
+
     assert command[0] == sys.executable
     assert command[1:3] == ["-m", "src.langchain.lc_ask"]
     assert "--key" in command
@@ -115,6 +119,7 @@ def test_build_question_invocation_for_multi_agent_omits_legacy_subcommand(
     )
 
     assert route == "multi"
+
     assert command[0] == sys.executable
     assert command[1:3] == ["-m", "src.cli.multi_agent"]
     assert "ask" not in command
@@ -191,3 +196,4 @@ def main() -> None:
     flag = determine_flag(script, ["--index", "--index-dir"])
 
     assert flag == "--index-dir"
+