Add OrcaReplay to Observation - #540
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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Adds OrcaReplay to
### Observation, in alphabetical position between OpenLLMetry and wandb. One line, entry format and badge set match the surrounding rows.What it is. A record-replay debugger for AI agents. It records a run at the process and socket boundary — a local proxy in front of the model API plus a PATH shim for exit codes, a JSON-RPC tee for MCP, a shadow git index for per-turn file changes — then replays that run offline byte-for-byte, or forks it from any checkpoint onto a different model.
Why Observation rather than Tool. The neighbours in this section (Latitude, OpenLLMetry, wandb) answer what happened and what it cost. OrcaReplay covers the same ground and adds re-execution: the recorded trace runs again with the network off, so the failure can be stepped through repeatedly instead of read once. The trace format is a normative spec published under CC BY 4.0, so other readers can reimplement it — there is already a Python one alongside the TypeScript core.
Apache-2.0, Node 20+, 1,393 tests, published on npm as
orcareplay. Also ships an MCP server (orca mcp) so an agent can read and replay its own runs.Disclosure: I work on OrcaReplay.
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