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test(codemode): drop leftover $codemode references (#36451)

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packages/codemode/README.md
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# @opencode-ai/codemode
CodeMode is a lightweight, JavaScript-like DSL for model-written orchestration programs, backed by a pure JavaScript
interpreter - no `eval`, no VM, no code generation. A program can only call the schema-described tools its host
supplies: it can sequence calls, transform plain data, branch, loop, and run independent calls in parallel, without
ambient filesystem, process, network, module, or application authority. Instead of many model round trips, the model
writes one small program that does the orchestration in code.
This is our take on code mode. Programs are written in a lightweight, JavaScript-like DSL and run in the package's
own interpreter. They never execute as actual JavaScript, so there is no runtime to escape into. The interpreter
itself can reach nothing; every effect a program has goes through a tool you explicitly supplied. The tradeoff is a
bounded language rather than full JavaScript: the [interpreter support checklist](./interpreter-support.md) documents
exactly what is supported.
The supported language and standard-library surface is documented exhaustively in the
[interpreter support checklist](./interpreter-support.md).
[Cloudflare's post](https://blog.cloudflare.com/code-mode/) introduced the idea. Their implementation executes
generated code in isolate sandboxes. We took a lighter route: a pure interpreter that runs wherever your application
runs, no sandbox required.
## How it differs from JavaScript