Experiential turns your OTel traces into a fine-tuned model you own.

An Apache-2.0 OpenAI-compatible gateway at 695 stars, with per-user and per-agent spend controls, that ingests OpenTelemetry traces from existing agent workflows, builds a simulation from them, and uses that to fine-tune an open-source model you own (GitHub). Rust-native, reporting under 1ms added latency for BYOK requests. It reframes a router from a cost-arbitrage layer into an exit: your production traffic becomes the training set that lets you leave the frontier vendor.