feat: vercel runner + shared stream→TUI bridge#589
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This was referenced Jun 5, 2026
The `vercel` variant of the wizard-runner flag: wraps the Vercel AI SDK v6 ToolLoopAgent over the gateway-pointed @ai-sdk/anthropic model. Adds the SDK-agnostic substrate both new runners share: - run-bridge: assistant text → signal markers ([STATUS]/[DASHBOARD_URL]/ [NOTEBOOK_URL]/[ABORT]), task store → syncTodos, finalize() → the same AgentErrorType result the Anthropic SDK path returns. - conclude: the post-loop tail (spinner-stop messages, remark/duration analytics, benchmark finalize), mirroring runAgent so runners don't drift. - mcp: neutral HTTP MCP descriptors projected from the SDK mcpServers map. selectRunner now routes vercel → VercelRunner (pi still falls back to anthropic until #524). Flag default stays anthropic; rollout gated by #527. Both SDKs are ESM-only, so the runner lazy-imports them inside run() (the getSDKModule pattern) — selection stays SDK-free. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Closes #523
Epic: #520 · Behavior change: none (flag off) · Depends on: #522
Summary
Implement
VercelRunneron the Vercel AI SDK's agent loop. Selected atwizard-runner=vercel.Scope
ai,@ai-sdk/anthropic.createAnthropic({ baseURL: <gateway>, apiKey: <posthog key>, headers: <shared headers> })—keeps the Anthropic protocol the gateway already speaks; swappable to other providers later.
ToolLoopAgent(orstreamText+stopWhen) with the shared coding toolset astool({ inputSchema, execute }); model from run context.fullStream(text deltas, tool-call/result, step-finish) → shared stream→TUI bridge.AgentErrorType; honor[ABORT].Acceptance criteria
vercel; anthropic unaffected.Files
src/lib/agent/runner/vercel-runner.ts