# fast-rich Plan / Feature Memory

> This file tracks the implementation status of the `fast-rich` crate.
> **Focus**: Pure Rust implementation of Rich-style terminal formatting.

## 1. Feature Coverage (Rust Core)

| Feature Family | Component | Status | Tested | Benchmarked | Documented | Notes |
| :--- | :--- | :---: | :---: | :---: | :---: | :--- |
| **Console & I/O** | `Console` | [x] | [x] | [x] | [x] | Supports stdout/stderr/buffer, auto-detects color/width. |
| | `print` APIs | [x] | [x] | [ ] | [x] | High-level `print`, `println`. |
| **Style & Text** | `Color`, `Style` | [x] | [x] | [x] | [x] | ANSI, RGB, Xterm colors. Styles (bold, dim, etc.). |
| | `Text`, `Span` | [x] | [x] | [x] | [x] | Text wrapping, parsing, alignment. |
| | `Markup` | [x] | [x] | [x] | [x] | `[bold red]...[/]` parsing. |
| **Layout** | `Panel` | [x] | [x] | [x] | [x] | Borders, titles, padding. |
| | `Rule` | [x] | [x] | [x] | [x] | Horizontal rules with titles. |
| | `Columns` | [x] | [x] | [x] | [x] | Grid layout. |
| | `Layout` | [x] | [x] | [ ] | [x] | Splitter/Tiling concept (Enhanced). |
| **Table** | `Table` | [x] | [x] | [x] | [x] | auto-width, borders, headers, footers. |
| **Progress** | `Progress` | [x] | [x] | [x] | [x] | Multi-bar, customizable columns. |
| | `Spinner` | [x] | [x] | [ ] | [x] | Loading spinners. |
| | `Status` | [x] | [x] | [ ] | [x] | Spinner + Message. |
| **Tree** | `Tree` | [x] | [x] | [x] | [x] | Hierarchies with guidelines. |
| **Content** | `Markdown` | [x] | [x] | [x] | [x] | CommonMark rendering (feature gated). |
| | `Syntax` | [x] | [x] | [x] | [x] | Code highlighting (syntect, feature gated). |
| **Diagnostics** | `Traceback` | [x] | [x] | [ ] | [x] | Pretty error rendering. |
| | `Log` | [x] | [x] | [ ] | [x] | Structured logging. |
| **Utility** | `Inspect` | [x] | [x] | [ ] | [x] | Debug inspection. |
| | `Live` | [x] | [x] | [ ] | [x] | Live display refresh (Cursor control). |

## 2. Testing Coverage

### Unit Tests (`src/**/*.rs`)
- **Status**: ~100 tests giving high coverage of logic (parsing, wrapping, styles, layout math).
- **Gaps**: None.

### Integration / Snapshot Tests (`tests/snapshots.rs`)
- `test_style_snapshot`: Verified ANSI styling.
- `test_table_snapshot`: Verified borders, columns, wrapping.
- `test_panel_snapshot`: Verified styling, titles.
- `test_tree_snapshot`: Verified hierarchy guides.
- `test_rule_snapshot`: Verified horizontal rules.
- `test_columns_snapshot`: Verified grid layout.
- `test_markdown_snapshot`: Verified rendering.
- `test_syntax_snapshot`: Verified highlighting (simple).

## 3. Example Coverage

| Feature | Example File | Description |
| :--- | :--- | :--- |
| **Styles/Text** | `examples/styles_demo.rs` | Comprehensive styles, colors, attributes. |
| **Tables** | `examples/tables_demo.rs` | Advanced tables, styles, alignment. |
| **Panel/Layout** | `examples/panel_layout.rs` | Panels and Columns layout. |
| **Tree** | `examples/tree_view.rs` | Nested trees with guides. |
| **Progress** | `examples/progress_bar.rs` | Interactive simulation. |
| **Traceback** | `examples/traceback_demo.rs` | Error handling/traceback display. |
| **Markdown/Syntax** | `examples/markdown_syntax.rs` | Combined feature-gated rendering. |
| **Showcase** | `examples/showcase.rs` | Full library tour. |

## 4. Benchmark Coverage

**Location**: `benches/` (Using `criterion`)

| Scenario | Status | Notes |
| :--- | :---: | :--- |
| **Text/Markup** | [x] | Parsing (21µs) and rendering (13µs). |
| **Table** | [x] | 100 rows (~163µs). |
| **Panel** | [x] | Styled panels (~4.8µs). |
| **Tree** | [x] | Nested hierarchy (~6.7µs). |
| **Markdown** | [x] | Rendering document (~27.3µs). |
| **Syntax** | [x] | Highlight & Render 20 lines Python (~210µs). |
| **Progress** | [x] | Task creation + 100 updates. |
| **Traceback** | [x] | Error panel rendering. |

**Result Storage**: `benchmarks/results/rust/v0.3.0/results.txt`

---

## 5. Deep Testing Protocol

**Purpose**: Byte-level verification of ANSI output and cross-platform compatibility.

### 5.1 ANSI Escape Code Verification

| Code Type | Format | Verification Method | Status |
| :--- | :--- | :--- | :---: |
| **Bold** | `\x1b[1m` | `cat -v` raw output | [x] |
| **Italic** | `\x1b[3m` | `cat -v` raw output | [x] |
| **Underline** | `\x1b[4m` | `cat -v` raw output | [x] |
| **Strikethrough** | `\x1b[9m` | `cat -v` raw output | [x] |
| **Dim** | `\x1b[2m` | `cat -v` raw output | [x] |
| **256-color FG** | `\x1b[38;5;{n}m` | `grep "38;5"` | [x] |
| **256-color BG** | `\x1b[48;5;{n}m` | `grep "48;5"` | [x] |
| **Truecolor (24-bit)** | `\x1b[38;2;R;G;Bm` | `grep "38;2"` | [x] |
| **Reset** | `\x1b[0m` | Every span ends with reset | [x] |

### 5.2 Cross-Platform Testing

| Platform | Terminal | CI Tested | Notes |
| :--- | :--- | :---: | :--- |
| **macOS** | Terminal.app, iTerm2 | [x] | Primary dev environment |
| **Linux** | GNOME Terminal, Konsole | [x] | GitHub Actions (ubuntu-latest) |
| **Windows** | Windows Terminal, cmd.exe | [x] | GitHub Actions (windows-latest) |
| **WSL** | Various | [ ] | Optional verification |

### 5.3 Unicode Box Drawing

| Border Style | Characters | Status |
| :--- | :--- | :---: |
| **Rounded** | `╭╮╰╯─│` | [x] |
| **Heavy** | `┏┓┗┛━┃` | [x] |
| **Double** | `╔╗╚╝═║` | [x] |
| **ASCII** | `+-\|` | [x] |

### 5.4 Deep Testing Commands

```bash
# Verify ANSI codes in output
cargo run --example styles_demo 2>/dev/null | cat -v | head -30

# Check truecolor RGB
cargo run --example styles_demo 2>/dev/null | cat -v | grep "38;2"

# Verify box drawing
cargo run --example table 2>/dev/null | cat -v | grep -E "╭|┏|╔"
```

---

## 6. Python Bindings Detail (Restored Context)

### `fast_rich` Module
- [x] `Console` (print, log, print_X methods)
- [x] `Style`
- [x] `Table`
- [x] `Progress`
- [x] `Text`
- [x] `Panel`
- [x] `Rule`
- [x] `Tree`
- [x] `Markdown`
- [x] `Syntax`
- [x] `Columns`
- [x] `Traceback`
- [x] `Prompt`
- [x] `Layout`
- [x] `Live`
- [x] `inspect` (function)
- [x] `filesize` (module)

---

## 6. fast_rich Drop-in Replacement (Phase 32-37)

> Goal: Create `fast_rich` - a 100% API-compatible drop-in replacement for Python `rich`

### Architecture
```
User Code (unchanged) → fast_rich/ (Python API) → Rust Core (speed)
```

### Phase 32: Core API Wrappers
| Component | Status | Notes |
| :--- | :---: | :--- |
| `fast_rich/__init__.py` | [x] | Top-level exports |
| `fast_rich/console.py` | [x] | Console (full signature) |
| `fast_rich/table.py` | [x] | Table class |
| `fast_rich/text.py` | [x] | Text class |
| `fast_rich/style.py` | [x] | Style class |
| `fast_rich/panel.py` | [x] | Panel class |
| `fast_rich/rule.py` | [x] | Rule class |
| `fast_rich/box.py` | [x] | Box styles |

### Phase 33: Extended Components
| Component | Status | Notes |
| :--- | :---: | :--- |
| `fast_rich/progress.py` | [x] | Progress, track() |
| `fast_rich/tree.py` | [x] | Tree class |
| `fast_rich/markdown.py` | [x] | Markdown class |
| `fast_rich/syntax.py` | [x] | Syntax class |
| `fast_rich/columns.py` | [x] | Columns class |
| `fast_rich/traceback.py` | [x] | Traceback, install() |
| `fast_rich/layout.py` | [x] | Layout class |
| `fast_rich/live.py` | [x] | Live context manager |
| `fast_rich/prompt.py` | [x] | Prompt, Confirm |
| `fast_rich/inspect.py` | [x] | inspect() |

### Phase 34: Parity Tests (Coverage Gaps)
| Module | Parity Test File | Status | Gap |
| :--- | :--- | :---: | :--- |
| `console` | `tests/test_console_parity.py` | [x] | None |
| `table` | `tests/test_table_parity.py` | [x] | None |
| `text/panel` | `tests/test_text_panel_parity.py` | [x] | None |
| `markdown` | `tests/test_markdown_parity.py` | [x] | None |
| `syntax` | `tests/test_syntax_parity.py` | [x] | None |
| `tree` | `tests/test_tree_parity.py` | [x] | None |
| `progress` | `tests/test_progress_parity.py` | [x] | None |
| `traceback` | `tests/test_traceback_parity.py` | [x] | None |
| `json` | `tests/test_json_parity.py` | [x] | None |

### Phase 35: Example Coverage (Rust)

> **Policy**: Every example must be runnable AND strictly tested (via embedded `#[test]` with output capture).

| Feature Group | Example File | Status | Tested? | Notes |
| :--- | :--- | :---: | :---: | :--- |
| **Basics** | `examples/hello.rs` | [x] | [x] | Verified output. |
| | `examples/console_print.rs` | [x] | [x] | Verified output. |
| **Text/Styles** | `examples/styles_demo.rs` | [x] | [x] | Verified output. |
| **Tables** | `examples/tables_demo.rs` | [x] | [x] | Verified output. |
| **Panel/Layout** | `examples/panel_layout.rs` | [x] | [x] | Verified output. |
| **Tree** | `examples/tree_view.rs` | [x] | [x] | Verified output. |
| **Progress** | `examples/progress_bar.rs` | [x] | [x] | Verified output. |
| **Traceback** | `examples/traceback_demo.rs` | [x] | [x] | Verified output. |
| **Markdown/Syntax** | `examples/markdown_syntax.rs` | [x] | [x] | Verified output. |
| **Showcase** | `examples/showcase.rs` | [x] | [x] | Verified output. |
| **Logging** | `examples/logging_demo.rs` | [x] | [x] | Verified output. |
| **Layout Engine** | `examples/layout_demo.rs` | [x] | [x] | Verified output. |
| **Live Display** | `examples/live_table.rs` | [x] | [x] | Verified output (interactive). |
| **Inspect** | `examples/inspect_demo.rs` | [x] | [x] | Verified output. |

### Phase 36: 100% API Coverage
| Module | Status | API Coverage |
| :--- | :---: | :--- |
| align.py | [x] | Align, VerticalCenter |
| padding.py | [x] | Padding |
| json.py | [x] | JSON |
| highlighter.py | [x] | Highlighter, RegexHighlighter |
| theme.py | [x] | Theme, DEFAULT_THEME |
| filesize.py | [x] | decimal, traditional |
| segment.py | [x] | Segment, Segments |
| measure.py | [x] | Measurement |
| scope.py | [x] | render_scope |
| control.py | [x] | Control |
| status.py | [x] | Status |
| region.py | [x] | Region |
| color.py | [x] | Color, ColorTriplet |
| logging.py | [x] | RichHandler |
| styled.py | [x] | Styled |
| repr.py | [x] | auto decorator |
| terminal_theme.py | [x] | TerminalTheme, MONOKAI |
| containers.py | [x] | Lines, Group |
| console_options.py | [x] | ConsoleOptions |

### Phase 37: Final 17 Modules

| Module | Status | API Coverage |
| :--- | :---: | :--- |
| markup.py | [x] | escape, render |
| bar.py | [x] | Bar renderable |
| progress_bar.py | [x] | ProgressBar widget |
| pager.py | [x] | Pager, SystemPager |
| constrain.py | [x] | Constrain width |
| diagnose.py | [x] | Diagnostics report |
| ansi.py | [x] | AnsiDecoder, strip_ansi |
| cells.py | [x] | cell_len utilities |
| palette.py | [x] | Palette, color matching |
| errors.py | [x] | ConsoleError, StyleError |
| protocol.py | [x] | is_renderable, rich_cast |
| abc.py | [x] | RichRenderable ABC |
| screen.py | [x] | Screen class |
| live_render.py | [x] | LiveRender class |
| jupyter.py | [x] | Jupyter support |
| default_styles.py | [x] | DEFAULT_STYLES |
| file_proxy.py | [x] | FileProxy |

**TOTAL: 58 Python modules for 100% Rich API coverage**

---

## Summary: fast_rich vs rich comparison

| Category | rich modules | fast_rich modules | Coverage |
| :--- | :---: | :---: | :---: |
| Core | 7 | 7 | 100% |
| Extended | 11 | 11 | 100% |
| Additional | 3 | 3 | 100% |
| Phase 36 | 19 | 19 | 100% |
| Phase 37 | 17 | 17 | 100% |
| **Total** | **57** | **58** | **100%** |



