A complete, model-agnostic LLM agent harness — loop, tools, context, memory, permissions, hooks, subagents, skills, MCP — with deterministic record/replay and trajectory evaluation built in.
Keep your MCP server quiet on stdout — safe print/logging and a stdout guard so debug output can't corrupt the JSON-RPC stream.
Anthropic, PBC
Visionary sponsor
Bloomberg
Visionary sponsor
Hudson River Trading
Visionary sponsor
Meta
Visionary sponsor
NVIDIA
Visionary sponsor
Microsoft
Sustainability sponsor
Depot
Continuous Integration
AWS
Cloud computing and Security Sponsor
Datadog
Monitoring
Fastly
CDN
Google
Download Analytics
Sentry
Error logging
StatusPage
Status page