initial commit: ralph-loop extension

- DAG-based task execution with dependency resolution
- Persistent progress tracking in .ralph/progress.json
- Reflection system for cross-task context
- Support for Fio README, checkbox, and YAML formats
- Retry with exponential backoff
- Parallel batch execution

README.md

@@ -0,0 +1,83 @@
+# ralph-loop
+
+Execute tasks from task files using DAG-based dependency resolution with persistent progress tracking.
+
+## Features
+
+- **DAG-based execution**: Tasks are ordered by dependencies using Kahn's algorithm
+- **Parallel batching**: Independent tasks in each batch can run concurrently
+- **Persistent progress**: Execution state saved to `.ralph/progress.json`
+- **Reflection system**: Each task produces a reflection for downstream tasks
+- **Retry with backoff**: Failed tasks retry with exponential backoff
+- **Multiple formats**: Supports Fio README, simple checkboxes, and YAML
+
+## Usage
+
+```
+/ralph plan [task-file]   # Show execution plan
+/ralph run [task-file]    # Execute all tasks
+/ralph status [task-file] # Show current progress
+/ralph resume [task-file] # Resume paused execution
+/ralph next [task-file]   # Execute next batch only
+/ralph reset [task-file]  # Reset all progress
+```
+
+## Task File Formats
+
+### Fio README Format
+
+```markdown
+# Project Title
+
+## Tasks
+
+- [ ] 01 — Setup project structure -> `tasks/01-setup.md`
+- [ ] 02 — Implement auth -> `tasks/02-auth.md`
+- [ ] 03 — Build API -> `tasks/03-api.md`
+
+## Dependencies
+
+1 -> 2
+2 -> 3
+```
+
+### Simple Checkbox Format
+
+```markdown
+- [ ] 01: Setup project structure
+- [ ] 02: Implement auth
+- [ ] 03: Build API
+```
+
+### YAML Format
+
+```yaml
+objective: Build a web application
+tasks:
+  - id: "01"
+    title: Setup project structure
+    file: tasks/01-setup.md
+    dependencies: []
+  - id: "02"
+    title: Implement auth
+    file: tasks/02-auth.md
+    depends_on: ["01"]
+```
+
+## Configuration
+
+Create `.ralph/config.yaml`:
+
+```yaml
+maxRetries: 3
+retryDelayMs: 5000
+timeoutMs: 1800000
+maxParallel: 3
+projectContext: "Additional context for all tasks"
+```
+
+## State Files
+
+- `.ralph/progress.json` - Execution progress
+- `.ralph/reflections/` - Per-task reflections
+- `.ralph/prompts/` - Generated prompts