Late STT must no-op after transcript purge
Sander Korf4 min read
Purge deleted transcript overlays while vendor STT still ran. Completion handlers recreated erased text. Missing overlay row means return, not upsert.
convex
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Writing
Convex
Convex backend notes for production apps: seeded Identify reducers, session audio purge, typed flow rules, and reactive queries that keep admin UI in sync.
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Convex rate limiter: check both buckets first
Sander Korf4 min read
Convex rate limiter on thread and global buckets can charge the session when global is empty. Check both rate limits before STT spend, then throw to roll back.
convex
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Convex Identify reducer before admin UI
Sander Korf4 min read
Clinicians read Identify as a spreadsheet. Engineers cannot prove it ends. I seed Convex, write a pure reducer, and replay the sheet paths in Vitest first.
convexvitesttypescript
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Pick a winner when Identify Compare stalls
Sander Korf4 min read
When two movements stay yes after Compare, looping the same chips teaches nothing. I pause for a pick, hatch the losers, and end the run as a hypothesis.
convextypescriptvitest
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Lock Identify rules to a typed Convex menu
Sander Korf4 min read
Identify is a clinician movement engine on Convex. Spreadsheet authors invent words weekly; lock metrics and actions to validators so the reducer stays boring.
convextypescript
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Convex session audio purge is terminal-only
Sander Korf3 min read
A research product records session audio apart from chat. Deleting a thread must not wipe the rolls. Admin purge is terminal-only and deletes chunks first.
convexnextjs
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