# Lumacs Development Continuation Prompt

Copy this entire prompt to start a new conversation and continue development:

---

I'm working on **Lumacs**, an Emacs-inspired text editor written in C++20 with ncurses and Lua scripting. The project is located at `/Users/user/Projects/lumacs`.

## Current Status

**Phase 3: Enhanced Editing - COMPLETE ✅**
- Emacs compatibility: **85/100**
- Build: Successful, binary at `./build/lumacs`
- ISearch, Word Ops, Case Conversion, Commenting implemented.

### What's Been Implemented

#### 1. Incremental Search (Phase 3)
- **C-s/C-r** - Forward/Backward search with highlighting
- Input loop in C++, rendering support

#### 2. Editing Features (Phase 3)
- **M-d/M-DEL** - Kill word / Backward kill word
- **M-u/M-l/M-c** - Word case conversion
- **C-x C-u/C-l** - Region case conversion
- **M-;** - Comment/Uncomment (DWIM)

#### 3. Buffer Management (Phase 2)
- **C-x b** - Switch buffer
- **C-x k** - Kill buffer
- **C-x C-b** - List buffers

#### 4. Core (Phase 1)
- Kill Ring, Mark/Region
- Undo/Redo
- Lua configuration

## Project Architecture

### C++ Core
- **EditorCore:** Added ISearch support, word kill logic.
- **Buffer:** Added `find_backward`, `clear`.
- **NcursesEditor:** Implemented ISearch mode UI.

### Lua Configuration
- **init.lua:** Contains logic for case conversion and commenting.

## What Needs to Be Done Next

### Phase 4: Polish & Advanced Features (~1-2 days)
**Goal: Power user features**
**Target:** 95% Emacs compatibility

#### Required Features:

1. **Registers:**
   - **C-x r s <char>** (copy-to-register) - Save region to register
   - **C-x r i <char>** (insert-register) - Paste from register
   - Needs `Register` class in C++ or Lua table.

2. **Rectangles:**
   - **C-x r k** (kill-rectangle)
   - **C-x r y** (yank-rectangle)
   - **C-x r t** (string-rectangle) - Fill with text
   - Complex operation: operates on columns.

3. **Keyboard Macros:**
   - **F3** (start-kbd-macro)
   - **F4** (end-kbd-macro / call-last-kbd-macro)
   - Needs event recording system in `EditorCore`.

4. **Minibuffer History:**
   - **M-p / M-n** in minibuffer to cycle previous commands/search queries.

### Phase 5: Final Polish
- Performance tuning
- More modes (Python, C++)
- Documentation

## Testing Instructions

### Build:
```bash
cd /Users/user/Projects/lumacs
cmake --build build
```

### Test Phase 3:
See `PHASE3_TEST.md` for detailed steps.

## Questions to Ask Me

1. "How is ISearch implemented?" → Check `src/main_ncurses.cpp` `handle_input`
2. "Where is the Lua API?" → `src/lua_api.cpp`

## Starting Phase 4

Begin with:
1. **Registers:** Simple to implement in Lua or C++.
2. **Minibuffer History:** Modify `main_ncurses.cpp` to store history vector.
3. **Macros:** Requires recording key events.
4. **Rectangles:** The hardest part. Leave for last.

## Success Criteria for Phase 4

✅ Save/Restore text from registers
✅ Record and replay macros
✅ Minibuffer has history
✅ Rectangle operations work (basic kill/yank)

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**Please continue with Phase 4: Polish. Start with Registers and Minibuffer History.**