docs(agentos): sync from rivet-dev/agentos

[NathanFlurry]

Automated docs sync from rivet-dev/agentos@4f0dab7.

Do not edit vendor/agentos/ here. Edit the docs in rivet-dev/agentos and this PR updates itself.

[railway-app]

🚅 Deployed to the website-pr-39 environment in rivet-website

Service	Status	Web	Updated
website	😴 Sleeping (View Logs)	Web	Sep 17, 2026 at 2:57 am UTC

[the-company-company]

🟠 1 medium-severity finding

_{Reviewed commit 441bb3b.}

[the-company-company]

🟠 Medium · Sandbox quickstart discards the command output

process.exec() now defaults to output.capture = "none" (the sidecar maps an omitted capture mode to ExecutionOutputCapture::None). Null-coalescing stdout therefore makes this supported quickstart print an empty Sandbox command, and the unchanged call below likewise prints an empty process list. Pass { output: { capture: "all" } } to both exec() calls, as the other updated quickstarts in this diff do.

[the-company-company]

🟠 2 medium-severity findings

_{Reviewed commit 43bbd7e.}

[the-company-company]

🟠 Medium · Sandbox quickstart discards the command output

process.exec() defaults to output.capture = "none"; the sidecar maps an omitted capture mode to ExecutionOutputCapture::None. Null-coalescing stdout therefore makes this quickstart print an empty Sandbox command, and the unchanged call below likewise prints an empty process list. Pass { output: { capture: "all" } } to both exec() calls, as the other updated quickstarts in this diff do.

[the-company-company]

🟠 Medium · System-prompt example bypasses snippet type checking

The agentOS docs convention explicitly forbids inline fenced TypeScript because only examples under examples/ embedded through <CodeSnippet> are compiled during the website build. This new API example can therefore drift without CI detecting it. Move it to a source example (using a named docs region if needed) and embed that region here with <CodeSnippet>.