Status & scope

FEVEX is an early MVP. The API may change before the first stable release.

Supported today

• Bounded multi-step model-tool loops with sequential tool execution.
• Native provider streaming and durable, consultable runs.
• Synchronous event observers and AsyncIterable event streaming.
• Local traces, OpenTelemetry export and deterministic evaluation suites.
• Optional Standard Schema validation.
• Immediate AbortSignal cancellation with cooperative underlying work.
• Conversation sessions, tool approval checkpoints, and resumable runs.
• Durable workflows and explicit team delegation, parallel work, and handoffs.
• Official OpenAI and DeepSeek model adapters, MCP and OpenAPI connections, and SQLite and PostgreSQL stores.

The default run store is in memory. Use a persistent store to retain runs and sessions across process restarts. Workflow recovery is explicit: applications provide their own recovery worker and timer scheduler.

Roadmap

Area	Status	Direction
Messaging channels	Next	Connect messaging surfaces such as Slack, Discord, WhatsApp, and Telegram through channel adapters.
Agent builder ecosystem	Planned	Templates, catalogs, and products built on top of the FEVEX runtime.

These are planned capabilities, with no committed release dates. Agent builders, marketplaces, and tenant management belong to products built on FEVEX; they are not part of the core package.

Out of scope

The MVP intentionally does not include:

• a CLI;
• a hosted observability service;
• model-judge evals;
• human evaluation workflows.

License

FEVEX is licensed under Apache-2.0.