fix: only write AI model prices that changed (#27923) - #28105
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Previously, the AI Gateway price seeder rewrote every row of `ai_model_prices` on each server start, because `ON CONFLICT` fires on a key conflict rather than on a value difference. `updated_at` therefore recorded when the server last restarted rather than when a price last changed. Guard the `DO UPDATE` branch so a conflicting row is only rewritten when one of its four prices differs. The comparison uses `IS DISTINCT FROM` rather than `<>` because the price columns are nullable, and `<>` yields NULL when either side is NULL, which would skip the update and leave a stale price in place. Related to https://linear.app/codercom/issue/AIGOV-567/experimental-cli-command-to-set-prices-for-unpriced-ai-models > [!NOTE] > Initially generated by Claude Opus 5, modified and reviewed by @ssncferreira (cherry picked from commit 5efa7ab)
mtojek
approved these changes
Aug 17, 2026
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Backport of #27923
Original PR: #27923 - only write AI model prices that changed
Merge commit: 5efa7ab
Requested by: @ssncferreira