https://legendev.org/notes/ Build notes from a systems engineer — what I ship, what breaks, what I learned en https://legendev.org/notes/lead-source-bandit/ https://legendev.org/notes/lead-source-bandit/ Wed, 08 Jul 2026 09:00:00 +0530 LeadForge scrapes fifteen-plus sources. Early on I picked which ones to run by feel — a bandit problem being solved by vibes. The reward function that fixed it counts qualified, contactable, decision-maker yield — volume appears nowhere. https://legendev.org/notes/build-org/ https://legendev.org/notes/build-org/ Fri, 26 Jun 2026 09:00:00 +0530 Trevion crossed 144K lines of code and the backlog was growing faster than I could type. So I stopped trying to be the workforce and built one — 105 PRs merged at ~4 commits/day, guarded by a regression gate that auto-reverts. https://legendev.org/notes/on-device-voice-ai/ https://legendev.org/notes/on-device-voice-ai/ Fri, 12 Jun 2026 09:00:00 +0530 A voice role-play app lives or dies on the gap between you finishing a sentence and the AI answering. On-device Whisper and Kokoro cut two of three network hops — then a browser security header ate a day of my life. https://legendev.org/notes/zero-cost-email-verification/ https://legendev.org/notes/zero-cost-email-verification/ Fri, 22 May 2026 09:00:00 +0530 Apollo wanted $49/month. The waterfall that replaced it: team-page scraping, pattern generation, DNS-MX lookups, live SMTP handshakes — 74% contactability at $0, after fixing the catch-all bug that inflated my first numbers.