Add harness-chat example#302
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A Claude Code agent runs in a Vercel Sandbox via AI SDK 7's experimental HarnessAgent and reports its work (steps, file changes, terminal output, test results) as a streamed json-render spec. Because HarnessAgent.stream() returns a standard StreamTextResult, the existing pipeJsonRender -> useJsonRenderMessage pipeline works unchanged. The example pins matching AI SDK 7 canary packages so the harness adapter, React hooks, and Vercel sandbox transport resolve together under the workspace release-age policy.
- allowedDevOrigins for the portless proxy origin (Next 16 silently fails to hydrate on non-allowlisted cross-origin dev requests) - serverExternalPackages for the harness adapter, which loads its sandbox bridge via new URL(..., import.meta.url) and cannot be bundled - README: document CLI-login (TTY) vs OIDC sandbox auth paths
- Add a UI agent selector (Claude Code / Codex / Pi) with per-agent harness sessions and monochrome brand marks - Add monochrome bar/line chart components to the catalog and registry - Polish the chat shell: minimalist Geist/Geist-Mono design, tool-call icons + containers, inline-code shading, and a working text shimmer
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Review the following changes in direct dependencies. Learn more about Socket for GitHub.
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- Replace the ASCII data-flow sketch with a mermaid flowchart and a sequence diagram of a turn - Update prose/setup to reflect the three-agent selector (Claude Code / Codex / Pi)
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The example pins matching AI SDK 7 canary packages so the harness adapter, React hooks, and Vercel sandbox transport resolve together