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📰 Dev.to · Ryosuke Tsuji

14 articles · Updated every 3 hours · View all reads

All Articles 188,907 Blog Posts 170,867 Tech Tutorials 50,624 Research Papers 36,768 News 23,147 ⚡ AI Lessons

GitHub Actions Getting Expensive? We Cut CI Costs to a Quarter With a One-Line Change

Dev.to · Ryosuke Tsuji ☁️ DevOps & Cloud ⚡ AI Lesson 1mo ago

GitHub Actions Getting Expensive? We Cut CI Costs to a Quarter With a One-Line Change

AI-driven development inflates CI cost on two axes at once: more runs, and more tasks you now want CI to do. We migrated our GitHub Actions runners twice, from

Observability Design for the AI Era — Reconciling PII Protection With AI Searchability, and Driving Self-Healing (Part 2)

Dev.to · Ryosuke Tsuji 🤖 AI Agents & Automation ⚡ AI Lesson 2mo ago

Observability Design for the AI Era — Reconciling PII Protection With AI Searchability, and Driving Self-Healing (Part 2)

Part 1 laid out four monitoring axes (application / infrastructure / CI / LLM) and the shape each one ends up in. Part 2 picks up where the data actually flows:

Observability Design for the AI Era — Application / Infrastructure / CI / LLM, Each in Its Own Shape (Part 1)

Dev.to · Ryosuke Tsuji 🛠️ AI Tools & Apps ⚡ AI Lesson 2mo ago

Observability Design for the AI Era — Application / Infrastructure / CI / LLM, Each in Its Own Shape (Part 1)

The previous code-graph series was about reshaping a static analysis graph so AI could query it. The same kind of reshaping is needed on the observability side.

Making the Context Across 46 Repositories Semantically Searchable for AI (Part 2)

Dev.to · Ryosuke Tsuji 🛠️ AI Tools & Apps ⚡ AI Lesson 2mo ago

Making the Context Across 46 Repositories Semantically Searchable for AI (Part 2)

The biggest issue Part 1 left open was that AI couldn't reach the 46-repo codebase by natural-language query (the entry-point problem). This post is how I solve

Part 5 ("The Author Doesn't Have to Be an Engineer") has been generating sharp comments.
Worth a read for the thread alone.

Dev.to · Ryosuke Tsuji 🔧 Backend Engineering ⚡ AI Lesson 3mo ago

Part 5 ("The Author Doesn't Have to Be an Engineer") has been generating sharp comments. Worth a read for the thread alone.

The Author Doesn't Have to Be an Engineer: How the Harness Holds Quality (Series Part 5) ...

The Author Doesn't Have to Be an Engineer: How the Harness Holds Quality (Series Part 5)

Dev.to · Ryosuke Tsuji 📰 AI News & Updates ⚡ AI Lesson 3mo ago

The Author Doesn't Have to Be an Engineer: How the Harness Holds Quality (Series Part 5)

Series Part 5. With the harness handling quality at the gate, the people closest to the requirements -- business-side managers, PMOs -- now open PRs to producti

Human-on-the-Loop: AI Reviewing AI PRs at cortex (769 PRs/month, while raising the quality bar)

Dev.to · Ryosuke Tsuji 💻 AI-Assisted Coding ⚡ AI Lesson 4mo ago

Human-on-the-Loop: AI Reviewing AI PRs at cortex (769 PRs/month, while raising the quality bar)

Series Part 3. The common critiques of AI-assisted development -- 'review becomes the new bottleneck' and 'AI code drops the quality bar' -- largely don't apply

The Heart of the AI Harness: A Knowledge Graph of the AI, by the AI, for the AI (Series Part 2)

Dev.to · Ryosuke Tsuji 🤖 AI Agents & Automation ⚡ AI Lesson 4mo ago

The Heart of the AI Harness: A Knowledge Graph of the AI, by the AI, for the AI (Series Part 2)

Series Part 2: how we built cortex-product-graph (cpg) — a unified knowledge graph of code, docs, DB schemas, and infrastructure for the cortex AI platform. Bui

Building a Real AI Harness: Auto-Reviewed PRs, Self-Healing Ops, and Non-Engineer Contributors (Series Intro)

Dev.to · Ryosuke Tsuji 🤖 AI Agents & Automation ⚡ AI Lesson 4mo ago

Building a Real AI Harness: Auto-Reviewed PRs, Self-Healing Ops, and Non-Engineer Contributors (Series Intro)

Hi, I'm Ryan, CTO at airCloset. In my previous posts I've introduced the full picture of our 17...

Graph RAG Isn't a One-Shot Anymore — The Case for Agentic Graph RAG MCPs

Dev.to · Ryosuke Tsuji 🔍 RAG & Vector Search ⚡ AI Lesson 4mo ago

Graph RAG Isn't a One-Shot Anymore — The Case for Agentic Graph RAG MCPs

Hi, I'm Ryan, CTO at airCloset. Over my last few posts, I've introduced internal MCP servers we've...

Cutting Self-Built MCP Server Token Usage by 90% — The Parking Pattern

Dev.to · Ryosuke Tsuji ☁️ DevOps & Cloud ⚡ AI Lesson 4mo ago

Cutting Self-Built MCP Server Token Usage by 90% — The Parking Pattern

Hi, I'm Tsuji, CTO at airCloset. In my previous posts I introduced the full picture of our 17...

Bridging 'I Want to Build' and 'I Want to Publish Safely' for Non-Engineers — Sandbox MCP

Dev.to · Ryosuke Tsuji 📰 AI News & Updates ⚡ AI Lesson 5mo ago

Bridging 'I Want to Build' and 'I Want to Publish Safely' for Non-Engineers — Sandbox MCP

Hi, I'm Ryan, CTO at airCloset. In my previous posts, I've introduced our internal MCP servers: an...

We Built a Custom Graph RAG to Let AI Answer "Did That Initiative Actually Work?"

Dev.to · Ryosuke Tsuji 🧠 Large Language Models ⚡ AI Lesson 5mo ago

We Built a Custom Graph RAG to Let AI Answer "Did That Initiative Actually Work?"

Hi, I'm Ryan, CTO at airCloset. In my previous posts, I introduced an MCP server that lets you...

How We Built an Automated Meeting Intelligence System with Google Meet, Slack, and RAG

Dev.to · Ryosuke Tsuji 🤖 AI Agents & Automation ⚡ AI Lesson 5mo ago

How We Built an Automated Meeting Intelligence System with Google Meet, Slack, and RAG

Hi, I'm Ryan Tsuji, CTO at airCloset — a fashion subscription service based in Japan. In previous...