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README.md

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+# Ollama Models
+
+A small collection of Ollama Modelfiles centered on Google’s Gemma 3 Mini 2B (`gemma3n:e2b`). It includes two task‑focused models that work well together for Git workflows:
+
+- git-diff-analyzer: turns a staged unified diff into strict JSON.
+- git-commit-writer: converts that JSON (or a raw diff) into a Conventional Commit message.
+
+The goal is fast, local, reproducible commit assistance with minimal ceremony.
+
+## Quick Start
+
+Prerequisites:
+
+- Ollama installed and running (see https://ollama.com/download)
+- A Git repo with staged changes for the examples
+
+1) Pull the base model once:
+
+```bash
+ollama pull gemma3n:e2b
+```
+
+2) Build the specialized models from the included Modelfiles:
+
+```bash
+# Build analyzer
+ollama create git-diff-analyzer-gemma3n-e2b \
+  -f gemma3n-e2b/git-diff-analyzer/Modelfile
+
+# Build commit writer
+ollama create git-commit-writer-gemma3n-e2b \
+  -f gemma3n-e2b/git-commit-writer/Modelfile
+```
+
+3) Use them together (pipeline):
+
+```bash
+git diff --staged \
+  | ollama run git-diff-analyzer-gemma3n-e2b \
+  | ollama run git-commit-writer-gemma3n-e2b
+```
+
+This prints a ready‑to‑use Conventional Commit message to stdout.
+
+## Usage Details
+
+- git-diff-analyzer
+  - Input: unified diff (e.g., `git diff --staged`).
+  - Output: a single JSON object with summary, per‑file highlights, and footers (see `gemma3n-e2b/git-diff-analyzer/Modelfile` for the exact schema and guidance).
+  - Decoding is tuned for determinism (`temperature 0.1`).
+
+- git-commit-writer
+  - Preferred input: the analyzer’s JSON. Fallback: a raw diff.
+  - Output: ONLY a Conventional Commit message (no backticks or extra prose), wrapped at ~72 chars.
+  - Decoding is slightly more open (`temperature 0.2`) while keeping consistency.
+
+Tip: If you want to inspect or edit the analyzer JSON before generating a message:
+
+```bash
+git diff --staged \
+  | ollama run git-diff-analyzer-gemma3n-e2b \
+  | tee /tmp/diff-analysis.json
+
+cat /tmp/diff-analysis.json \
+  | ollama run git-commit-writer-gemma3n-e2b
+```
+
+## Repository Layout
+
+```
+gemma3n-e2b/
+  Modelfile                    # Generated by `ollama show` (pinned to a local blob)
+  git-diff-analyzer/Modelfile  # Build with `FROM gemma3n:e2b`
+  git-commit-writer/Modelfile  # Build with `FROM gemma3n:e2b`
+```
+
+Note on the top‑level `gemma3n-e2b/Modelfile`: it was generated via `ollama show` and references a local blob path in `FROM`. For portability, prefer the two task‑specific Modelfiles which already use `FROM gemma3n:e2b` and can be built anywhere after you `ollama pull` the base.
+
+## Git Convenience Alias (optional)
+
+Add a quick alias to print a suggested commit message from your staged changes:
+
+```ini
+[alias]
+  ai-commit = "!f() { \
+    git diff --staged | \
+    ollama run git-diff-analyzer-gemma3n-e2b | \
+    ollama run git-commit-writer-gemma3n-e2b; \
+  }; f"
+```
+
+Then run:
+
+```bash
+git ai-commit
+```
+
+## Notes & Troubleshooting
+
+- Stage changes first: `git add -p` or `git add <files>` before running.
+- Very large diffs may lead to longer runtimes; consider committing in smaller chunks.
+- If your environment lacks `gemma3n:e2b`, run `ollama pull gemma3n:e2b` before `ollama create`.
+- You can swap the base in Modelfiles to another small instruct model if you prefer.
+
+## Licensing
+
+- Base model: Gemma Terms of Use apply to the underlying model; a copy of the terms is embedded in `gemma3n-e2b/Modelfile`.
+- Modelfiles/system prompts in this repository are provided as-is; ensure your usage complies with the Gemma Terms of Use and your local policies.
+