Chidori

Overview

Chidori is a reactive runtime built in C for constructing durable AI agents. It provides an execution environment where agents react to events and state changes, ensuring persistence across restarts. The runtime is open-source and maintained by the community under ThousandBirdsInc.

Best for

Best for
Developers who need a lightweight, durable runtime for reactive AI agents and are comfortable working in C.

Use cases

• Building long-running, stateful AI agents that survive crashes
• Orchestrating reactive workflows triggered by external events
• Developing low-latency agent systems in resource-constrained environments

Notes

Chidori is a reactive runtime built in C for constructing durable AI agents. It provides an execution environment where agents react to events and state changes, ensuring persistence across restarts. The runtime is open-source and maintained by the community under ThousandBirdsInc.

1,346 stars on GitHub. Last updated 2026-05-31. Licensed Apache-2.0.

Use cases

• Building long-running, stateful AI agents that survive crashes
• Orchestrating reactive workflows triggered by external events
• Developing low-latency agent systems in resource-constrained environments

Pros

• High performance and low overhead from implementation in C
• Reactive model simplifies handling of asynchronous event streams
• Open-source with active community contributions

Cons

• C language may present a steeper learning curve for agent developers
• Smaller ecosystem compared to Python- or JS-based orchestration tools
• Limited documentation and examples for complex use cases

Indexed from awesome-langchain and enriched against its public facts.