| Agentic SWE / AI delivery platform engineer in Japan. |
I build AI that must survive production: affordable, trustworthy, accountable. My work is organized around one belief — AI entering enterprise production has to pass three gates at once, and I build a system for each gate.
Frugal — 95% of requests should never wake a big model. Safe — distrust the input, distrust the keys. Verified — Agents propose. Humans decide.
| Project | What it does |
|---|---|
| aiitg | AI Input Trust Gateway — hidden-content auditor for documents fed to LLMs/agents (zero-width chars, white text, hidden sheets). 102 tests. |
| keysmith | Go MCP server + CLI for agent-safe secrets: age-encrypted, masked views, self-healing rotation. Plaintext never enters agent context. |
| Project | What it does |
|---|---|
| fusion-cache | LLM API caching middleware: exact-match → semantic → upstream prefix-cache. 91 tests, up to 97% cost cut. |
| dsh-llm-cache | LLM response cache merged upstream into DeepSeek Harness (@deepseek-ai/dsh-llm-cache) — my contribution to the official repo. |
| Project | What it does |
|---|---|
| takumi | Model-agnostic platform for verifiable agentic software delivery: Manager/Executor/Auditor + verify-fail → repair → re-verify. 87/87 tests; 23-task eval 96% first-pass → 100% final. |
| proctor | Agent Eval tool: score, audit & explain agent trajectories — metrics + causal failure attribution. |
| decision-workbench | Expand the decision space before you decide — multi-model committee + human final call. Hidden-gold eval: 26% → 78% → 100% (12/12). |
| decision-space-expansion | The methodology behind decision-workbench, as a portable Agent Skill (EN/JA). Works with Claude Code, Cursor, Codex, Gemini CLI. |
| Project | What it does |
|---|---|
| agency-agents-ja | 323 production-ready AI agents for Japanese dev teams — Claude Code / Cursor / Copilot. |
| skills-ja-JP · superpowers-ja | Japanese localizations of engineering skill packs for AI coding agents. |
Sites:
- www.sscodeai.com — my portfolio: story, resume & project deep-dives
- sscodeai.com — docs system (Nimbus, Cloudflare open-source framework): product docs, tutorials & Japanese-market agent toolkits


