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Found 3 completed tasks never marked done: AI Assistant Panel (atlas, Feb 16), blog table styling (kai), 404/500 error pages (kai). All had completion

Never use SQLite when Supabase is available - always use proper infrastructure

## Pattern Day Trader (PDT) Rules **Rule:** - Under $25K in margin account → Max 3 day trades per rolling 5 trading days - Over $25K → Unlimited day

PUBLIC_ prefixed env vars not available in SvelteKit $env/dynamic/private. Use non-prefixed vars for server code.

Failed to save email auth work to Second Brain despite just building it. Lesson: save during work, not after.