Yutaka Kondo

Mora: an on-device, dyslexia-aware ESL tutor for L1-Japanese kids, built in 5 days with Claude Code and Opus 4.7. An 8-year-old child close to me has dyslexia. They're also learning English as a second language — we moved from Japan to the US last year. Their school's IEP for dyslexia is gated behind finishing ESL, costing them a year. Barton tutoring is too expensive. So I built Mora. Mora is an iPad app that pairs Orton-Gillingham phonics with a yokai RPG shell. A tile-board decoder enforces grapheme mastery. An on-device CoreML wav2vec2 phoneme model catches L1-Japanese substitutions (v→b, l→r, sh→s) and turns them into coaching, not red Xs. Nothing leaves the device. The MVP ships a JapaneseL1Profile; every engine routes through an L1Profile protocol so Korean, Mandarin, Spanish, and Vietnamese are content drops, not engine rewrites — international rollout is on the roadmap. I'm not a Swift engineer. I shipped 100+ PRs in 5 days using Claude Code and Opus 4.7 — every PR backed by a written spec and a plan, parallel sub-agents on isolated git worktrees collapsing 4-phase content batches from 6 hours to 1, and a custom Claude Code skill that pipes live OSLog from the iPad into Claude's context so debugging becomes a conversation. 5 SPM packages, 456 files, MPL-2.0, fully open source.