rm-hull / git-commit-summary / 27480572483

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feat: include recent commits in LLM context (#129)

* feat: include recent commits in LLM context

Add `RECENT_COMMITS_COUNT` configuration to include recent Git commit
messages in the system prompt. This helps the LLM learn and mimic the
project's preferred commit style.

- Added `RecentCommits` to `GitClient` interface.
- Updated `App` and `Model` to support passing commit history.
- Configured default behavior to fetch the last 5 commits.

* feat: add recent commit count to configuration

- Add `RecentCommitsCount` to configuration with validation
- Update setup wizard to allow configuring recent commit count
- Improve prompt structure using Markdown headers
- Fix git log argument formatting in `RecentCommits`

* fix: handle error during model configuration unmarshal

Add an explicit error check when unmarshalling the models JSON data
in `Load()` to prevent potential nil pointer dereferences or
silent failures.

* chore: add whitespace for readability in git client

Added a blank line after the `Commit` function to improve code structure
 and consistency within `internal/git/client.go`.

* refactor: wrap prompt context in markdown code blocks

Improve LLM prompt structure by wrapping project context and recent
commit examples in code blocks. This helps the model better distinguish
between instructions and provided context data.

```mermaid
graph TD
    A[Generate Summary] --> B{Include Context?}
    B -->|Yes| C[Apply Markdown Formatting]
    C --> D[System Prompt]
    D --> E[LLM Inference]
```

* test: add placeholder for gitDiffMsg test case

Add a new test run block for `gitDiffMsg` in the model update tests
to ensure recent commits are correctly included in the LLM prompt.

* fix: validate RECENT_COMMITS_COUNT environment variable

Return an error if RECENT_COMMITS_COUNT cannot be parsed as an integer,
preventing the application from starting with an invalid configuration.

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