This PR standardizes all documentation and configuration on GPT 5.1 model identifiers, removes deprecated GPT 5.0 models, and enforces full-opencode.json as the only officially supported configuration. The changes address GPT 5 model temperamental behavior and ensure users have the proper setup for reliable operation with OpenCode. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>