docs: expand scope and add comprehensive documentation

Create README.md and enhance AGENTS.md to position this as an
extensible framework for any Opencode skills and agents, not just
PARA/task management. Includes installation, development workflow,
code style guidelines, and Nix flake integration patterns.

command/reflection.md

@@ -0,0 +1,20 @@
+---
+description: Toggle reflection mode on/off for automatic skill improvement detection
+---
+
+Reflection mode is now set to: $1
+
+When reflection mode is **ON**, I will:
+- Actively monitor for user correction signals during conversation
+- Detect patterns where you correct my behavior  
+- Automatically suggest skill improvements when clear signals detected
+- Proactively ask "Should I reflect on this?" when corrections occur
+
+When reflection mode is **OFF** (default), I will:
+- Only perform reflection when explicitly requested
+- Respond to explicit commands like "reflect on [skill]"
+- No automatic signal detection or suggestions
+
+Current mode: **$1**
+
+Note: This setting is session-scoped and will reset to OFF in new sessions.