diff-visual

# Diff Visual Visualize git diffs as either self-contained interactive HTML reports (default) or inline markdown reports. HTML includes architecture diagrams, file maps, and change analysis. Markdown is the lighter alternative for terminal review or chat sharing. You write the output directly — no templates, no intermediate JSON, no agent chains. ## Instructions ### Format Detection Parse `--format` first: | Flag | Values | Default | Meaning | |------|--------|---------|---------| | `--format` | `html` \| `md` | `html` | `html` → full interactive dashboard at `${CLAUDE_PLUGIN_DATA}/reports/`. `md` → inline markdown report, delivered in the response | ### Scope Detection Parse the user's argument to determine the diff scope: | Input | Interpretation | Git command | |-------|---------------|-------------| | `HEAD` or nothing | Uncommitted changes | `git diff HEAD` | | `branch-name` | Branch vs main/master | `git diff main...branch-name` | | `#123` or PR URL | Pull request diff | `gh pr diff 123` | | `abc1234` | Single commit | `git show abc1234` | | `abc..def` | Commit range | `git diff abc..def` | | `abc...def` | Three-dot range | `git diff abc...def` | **Default base**: If the scope implies comparison against a base branch, detect the default branch: ``` git rev-parse --verify main 2>/dev/null || git rev-parse --verify master ``` **Scope validation**: Verify the ref/range exists before proceeding. If invalid, inform the user and stop. ### Language Detection Determ...