feat(hosted key): Add hosted key, exa as shared key#3221

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TheodoreSpeaks wants to merge 16 commits intostagingfrom

feat/sim-provided-key

Commits on Feb 13, 2026

feat(hosted keys): Implement serper hosted key
Theodore Li
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Handle required fields correctly for hosted keys
Theodore Li
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Add rate limiting (3 tries, exponential backoff)
Theodore Li
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Add custom pricing, switch to exa as first hosted key
Theodore Li
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Add telemetry
Theodore Li
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Consolidate byok type definitions
Theodore Li
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Add warning comment if default calculation is used
Theodore Li
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Record usage to user stats table
Theodore Li
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Fix unit tests, use cost property
Theodore Li
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Include more metadata in cost output
Theodore Li
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Fix disabled tests
Theodore Li
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Commits on Feb 14, 2026

Fix spacing
Theodore Li
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Fix lint
Theodore Li
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Commits on Feb 16, 2026

Move knowledge cost restructuring away from generic block handler
Theodore Li
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Migrate knowledge unit tests
Theodore Li
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Lint
Theodore Li
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