Add OrcaReplay — record an agent run, replay it offline, fork it onto another model

[xizhuomengcontin]

Adds apps/orcareplay/ — app.yaml plus a 256×256 logo.png.

Disclosure: I maintain OrcaReplay. Apache-2.0, Node 20+, npm i -g orcareplay.

What it is

It records a coding agent's traffic to its model provider and replays the run later with no provider contacted. orca replay last --from 4 --model <other> replays the run to step 4 from the recording and then continues on a different model — everything before the fork is byte-identical, so the model is the only variable. That last part is the reason someone routing through OpenRouter would want it: comparing models over a fixed prefix is exactly what a multi-model gateway is for.

Against your requirements, including the one I want you to check

• Uses OpenRouter for AI model access — this is the one to look at, so let me be exact rather than let it read better than it is. OrcaReplay is a recorder, not an app with its own chat surface: the model calls it captures are the ones your agent makes. Where OpenRouter comes in is the documented capture path — ORCA_BASE_URL_VARS='OPENROUTER_BASE_URL' orca record generic-openai -- <your agent> — which is what the docs link points at, and the models you fork a replay onto come from whatever provider that variable points to. If you read the requirement as "the app itself must call OpenRouter for its own features", close this and I will not re-file.
• Bring your own OpenRouter API key — yes; nothing is proxied through us and there is no account. Replay needs no key at all, because no model is called.
• Publicly accessible — public repo and npm package.
• Logo — 256×256 PNG, transparent, square, fitted rather than cropped.
• Traction / notability — 248★, published on npm as orcareplay, tagged releases, active.
• Tag — coding, matching where aider, cline and browser-use sit.

Two things it does not do

• A matching replay is not a determinism result. It proves the recorded exchange reproduces; it does not prove the agent or the model is deterministic.
• Replay blocks model-provider egress only. It is not a sandbox — recorded tool calls still execute for real.

🤖 Generated with Claude Code