v1.0
RAGOps
An evaluation and release-gate platform for production RAG and agent systems. Compare a candidate against an accepted baseline, detect quality and safety regressions, and produce auditable reports.
Open RAGOpsIdeas shaped into
working systems.
These projects bring together production-oriented engineering and practical language-learning tools. They reflect how I approach real problems, document what I’m learning, and make work available for feedback. I’m always glad to hear from teams, collaborators, and people exploring similar challenges.
Technical
AI · Data · Engineering
v0.14.17
Proofline
Local-first engineering decision memory for recovering why systems were built a certain way. It preserves immutable source versions and keeps every grounded answer traceable to exact source lines.
Open Proofline
Internal
NamiQuant
A local swing-trading decision-support system for the US, Japanese, and Vietnamese markets. It turns market data into deterministic scores, risk gates, position sizing, portfolio allocation, and an offline dashboard without placing orders.
Internal project · no public demo
Coming soon
KakeFlow
A local-first household finance workspace for macOS and Windows. It turns bank, card, wallet, receipt, spreadsheet, PDF, and securities data into a reconciled ledger and a separate investment portfolio.
Preview KakeFlow
Live
Data Copilot
Ask a question in plain English — no API key — and the browser turns it into real SQL, runs it (DuckDB-WASM), and charts the result. Or drop in your own CSV. Live market data refreshed daily by a GitHub Actions pipeline.
Open Data Copilot
Live
Pipeline Observability
The ELT job behind Data Copilot, instrumented — freshness, per-ticker coverage, and run history. A cron that commits its own telemetry, so you can watch it.
Open PipelineLanguage
Japanese · JLPT N1
Live
Kanji & Collocations漢字・連語
Mixed drill across kanji readings, collocations, and set phrases — three question banks in one quiz flow.
Open Kanji + Collocations
Live
JLPT N1 Kanji Analysis漢字分析
Per-character breakdowns of N1 kanji vocabulary — readings, meanings, and the logic behind each compound, word by word.
Open Kanji Analysis
Live
JLPT N1 Vocabulary Tabs語彙
A tabbed N1 vocabulary reference with verified answers — organized for fast lookup and review across topics.
Open Vocab Tabs
Live
Vocabulary Exams 2010–2025問題1〜4
Every vocabulary question from the real N1 exams, 2010–2025 — 問題1 through 問題4, compiled into one drillable archive.
Open Exam Vocab
Live
Context Vocabulary問題2 · 504問
Contextually-defined-word drills from tests 25–66 — all 504 questions of 問題2, with answers.
Open 問題2
Live
Paraphrase Vocabulary問題3 · 言い換え
Paraphrase / synonym drills (言い換え類義) from tests 67–81, plus review sets — pick the closest meaning.
Open 問題3
Live
Grammar Flashcards文法
Flip-card drills for JLPT N1 grammar — progress bar, right/wrong tracking, and a clean flow for fast repetition.
Open N1 Flashcards
Live
Grammar Exams 2010–2024文法
Every grammar question from the real exams, 2010–2024 — organized by year and pattern, with explanations.
Open Grammar
Live
Sentence Ordering文の文法②
Sentence-ordering drills for JLPT N1 (文の文法② · pick the piece for ★) — 420 questions merged from two sets, each with the correct order, grammar point, and a Vietnamese walkthrough.
Open N1 文法②
Live
Sentence Ordering Drill問題6 · 並べ替え
A second sentence-scramble bank for 問題6 — 140 questions with exam and grammar-pattern filters, and a different question pool from 文法②.
Open Mondai 6 Drill
Live
Reading — 75 Passages読解
The full 75-passage reading course built around the "anchor word" method — passage, questions, and guided walkthroughs.
Open 読解 75 bài
Live
Reading Practice問題9 · 中文
Mid-length passage practice for 問題9 — reading drills with the B1→B4 method and reverse / anchor-word techniques.
Open 問題9