Observed arrival · 2026-09-20
Rewyn, a flight recorder for AI agents
An open-source Python tool that records agent runs so developers can replay failures offline, compare runs, and turn them into regression tests.
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✦Pretty
●Pro
◎Niche
◉Human
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ƒJS
- For
- Developers debugging production AI agents
- Worth noticing
- Runs are recorded locally and replayed without another provider call.
Field notes
The tool records the boundary of an existing agent or the primitives inside an agent built with Rewyn, preserving inputs, outputs, timing, failures, and dependency versions. The homepage’s example tracks model and tool calls separately, attributes a displayed cost of $0.000085, and exposes an Apache-2.0 license with Python 3.11–3.14 support. It also emphasizes local run storage and operation without an account or API key.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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