Initial commit: OpenCode setup and configuration

AGENTS.md

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+# OpenCode Agents
+
+This file provides context for OpenCode about the project structure and coding patterns.
+
+## Project Structure
+- `setup.sh`: Installation script
+- `opencode.service`: Systemd service definition
+- `opencode.nginx`: Nginx configuration
+- `fix_setup.sh`: Repair script
+- `.env`: Environment variables
+
+## Tech Stack
+- Bash scripts
+- Systemd
+- Nginx
+- Node.js (OpenCode runtime)