[UPDATE] Loader handles git-lfs pointer files; hf download instructions; limitation note

README.md

@@ -32,11 +32,14 @@ The same model also does simple tool calling (weather, search, calculator, unit
 ## Try it
 
 ```bash
-git clone https://huggingface.co/Neithanvarvas/CBT && cd CBT
+pip install -U huggingface_hub
+hf download Neithanvarvas/CBT --local-dir CBT && cd CBT
 pip install -r requirements.txt
 python chat.py
 ```
 
+`git clone https://huggingface.co/Neithanvarvas/CBT` also works; without git-lfs the weights are fetched on first run.
+
 ```text
 > 123456789+987654321
   scratchpad : (0+9+1)=10(1+8+2)=11(1+7+3)=11(1+6+4)=11 ... (1+0+0)=01
@@ -133,6 +136,7 @@ Scratchpad steps read `(carry + digit_a + digit_b) = carry_out digit`, from the
 ## Limitations
 
 - Addition of non-negative integers is the only arithmetic it was trained on. Accuracy drops beyond 55 digits, and the 1024-character context caps sums at roughly 75 digits.
+- Replies can drift into garbled text after the tool result (for example, "What is the weather in Paris?" ends with misspelled filler).
 - The chat ability is narrow: it was trained on synthetic tool-calling dialogues with a fixed set of tools. It is not a general assistant and has little world knowledge.
 - Character-level, English-only, ASCII-only. Other characters become `<UNK>`.
 

cbt/__init__.py

@@ -28,7 +28,8 @@ def _resolve(source: Optional[str], filename: str) -> str:
     """Finds `filename` in a local folder (default: the repo root next to this package) or downloads it."""
     folder = source or os.path.dirname(_PKG_DIR)
     local = os.path.join(folder, filename)
-    if os.path.isfile(local):
+    # A clone made without git-lfs leaves a ~130-byte pointer file instead of the weights.
+    if os.path.isfile(local) and not (filename.endswith(".safetensors") and os.path.getsize(local) < 1024):
         return local
     from huggingface_hub import hf_hub_download
     return hf_hub_download(repo_id=source if source and not os.path.isdir(source) else REPO_ID, filename=filename)