fix(research): bound nested model synthesis

[iamjr15]

Why

Production deep-research runs repeatedly failed in the per-query synthesis step after Anthropic returned HTTP 524. Each pass sent a large evidence pack with the default 4,096-token output budget, and the synthesis stage allowed 8,192 tokens.

What changed

• Bound Exa and Firecrawl evidence included in each model pass.
• Use stage-appropriate 2,048-token pass and 4,096-token final synthesis budgets.
• Bound every nested research generation to 75 seconds.
• Retry one transient timeout, rate-limit, or 5xx failure in memory while preserving parent cancellation.
• Emit a structured warning when that retry is used.
• Document the request-scoped retry and non-persistence boundary.

Architecture and data

No schema, migration, environment, vendor, or deployment-topology changes. BYOK credentials remain request-scoped and no Mastra workflow snapshot contains secret-bearing state.

Verification

• pnpm lint
• pnpm typecheck
• pnpm turbo build --force
• pnpm deadcode
• pnpm architecture:check
• pnpm turbo skills:build
• Production Worker trace reproduced the original HTTP 524 twice before the fix.

The repository pins Node 24.18.0; local verification ran on Node 26.4.0 and emitted only the existing engine warning.

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
cheatcode	Skipped		Aug 5, 2026 5:50am