forked from enderofwings/NexusOS
render_preview validates markup and hands it to the browser, which renders it in an opaque-origin sandboxed iframe. Nothing executes server-side. That model fits HTML/SVG/JSX and cannot fit C, Rust or Erlang, which need a real toolchain - so those get a second tool instead of a widened first one. The split is the feature: the model picks a track by picking a tool, rather than picking a `lang` value from an enum where half the entries run server-side and half do not. synapse/code_run.py compiles and runs one file in a throwaway directory and returns a ```nexus-run fence carrying the source and its captured output together, so a model cannot paste output without the code that produced it. Backticks in the source are re-encoded as ` - still valid JSON, and it cannot close the fence early. It is not a sandbox, and the module docstring says so up front. What it gives is containment by layers: consent (an action tool, gated by action_tool_policy, per-call Approve/Deny on "ask"), static screening, a scrubbed environment in a temp dir, wall-clock and POSIX rlimits, and a network namespace on Linux where unprivileged userns are available. Screening is a tripwire against a model reaching for `requests` out of habit, not a boundary against an adversary; layers 1 and 3-5 are the load-bearing ones. Backend RUN_LANGS and frontend run-langs.js are separate registries because the two sides need different things - one executes, one labels - and neither should depend on the other at runtime. tests/test_tools.py asserts the key sets and the fence tag stay equal, so drift fails the gate instead of rendering a run result under the wrong language. tests/snippet_probes/ is a data catalog rather than inlined cases, so adding a language is a data change and the meta-tests can assert every RUN_LANGS key has both a smoke probe and a screening probe. Probes skip cleanly on hosts without the toolchain. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
React + Vite
This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
Currently, two official plugins are available:
- @vitejs/plugin-react uses Oxc
- @vitejs/plugin-react-swc uses SWC
React Compiler
The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see this documentation.
Expanding the ESLint configuration
If you are developing a production application, we recommend using TypeScript with type-aware lint rules enabled. Check out the TS template for information on how to integrate TypeScript and typescript-eslint in your project.