Experiential Launched an Open-Source Model Gateway That Turns Your OTel Traces Into a Fine-Tuned Model You Own

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experientiallabs/experiential hit the Hacker News front page on August 27 with 204 points, an Apache-2.0 OpenAI-compatible gateway at 695 stars offering one control plane across closed, open-source, local and custom models, plus per-user and per-agent spend controls. The distinguishing move is that it ingests OpenTelemetry traces from existing agent workflows, builds a simulation from them, and uses that to fine-tune an open-source model you own. That reframes a router from a cost-arbitrage layer into an escape hatch, since your production traffic becomes the training set that lets you leave the frontier vendor.