Cause: Using Anthropic/DeepSeek/Kimi thinking mode with an outdated ACP version or missing reasoning sync.
Fix:
- Update to ACP v3.0.0+:
npm install @tuanhung303/opencode-acp@latest - Ensure your config has thinking-compatible settings
- See Known Pitfalls for detailed code examples
Symptoms: Commands like /acp return "Unknown command"
Fix:
- Verify plugin is in
opencode.jsonc:"plugin": ["@tuanhung303/opencode-acp@latest"] - Run
npm run build && npm linkin the plugin directory - Restart OpenCode
Check:
- Is aggressive pruning enabled in config? See Configuration
- Are you using protected tools excessively? (
task,write,editcan't be pruned) - Is your session >100 turns? Consider starting a fresh session
- Subagents: ACP is disabled for subagent sessions
- Cache Invalidation: Pruning mid-conversation invalidates prompt caches
- Protected Tools: Some tools cannot be pruned by design
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