fix links: GitHub URL + base/sft cross-links

README.md

@@ -15,11 +15,11 @@ library_name: pytorch
 A 435M-parameter decoder-only Transformer for Python code completion. Data pipeline, tokenizer,
 architecture, training loop, checkpoint merging and evaluation were all written and run by one person
 on one consumer GPU — this repository holds the weights; the code, design record, ablation report and
-failure log live in the GitHub repository linked below.
+failure log live in the GitHub repository at https://github.com/TightXu/Simple_Code_LLM.
 
 > **This folder is the pretrained base.** Its weights are the *merged* (weight-averaged) product of the
 > pretraining run: under this training scheme the merged checkpoint, not the last step, is the finished
-> pretrained model — hence the folder name. The instruction-tuned variant is in [`../sft`](../sft).
+> pretrained model — hence the folder name. The instruction-tuned variant is in [`TightX/code-llm-435m-sft`](https://huggingface.co/TightX/code-llm-435m-sft).
 
 ## Architecture
 
@@ -101,4 +101,4 @@ reproduce patterns (and licensing quirks) from the training corpus despite copyr
 
 Everything else — `DESIGN.md` (decisions and why), `CHALLENGES.md` (every bug and contaminant),
 the ablation report, the fine-tuning log with corrections, and every evaluated generation — is in the
-GitHub repository. MIT licensed.
+GitHub repository at https://github.com/TightXu/Simple_Code_LLM. MIT licensed.