Mario Hayashi

Building products with AI. Indie maker

[Mario Hayashi @logicalicy]

Built an AI orchestration system that writes PRDs, ships code and reviews PRs. Along the way I replaced myself. I added one agent, then another. The factory must grow. #buildinpublic #AI

[Mario Hayashi @logicalicy]

7/ Full post: https://t.co/DWm8A7jzMX

[Mario Hayashi @logicalicy]

Part IV: The Factory Must Grow. Building an AI orchestrator that ships PRs without me. Added End-to-End (E2E) testing that show agents are doing what they're supposed to #buildinpublic #AI

[Mario Hayashi @logicalicy]

6/ Still a work in progress. The system still breaks in new ways. But the gap between "it ran" and "it worked" feels smaller now 👇

[Mario Hayashi @logicalicy]

7/ Full post: https://t.co/9KjOSxOiUI

[Mario Hayashi @logicalicy]

Part III: The Factory Must Grow. My AI agent factory silently dropped dozen PRDs and auto-closed them. The fix wasn't a plaster it was learning to stop the line completely and walk every failure to a policy. Dead code beats limping code. A work in progress...! #buildinpublic #AI

[Mario Hayashi @logicalicy]

6/ I haven't solved it. The system still breaks. It's a work in progress and the principles will make autonomy possible (hopefully!)

[Mario Hayashi @logicalicy]

5/ Full post: https://t.co/YCJQM3oDhe. The orchestration that drafts PRDs, ships code, reviews PRs on semi-autopilot.

[Mario Hayashi @logicalicy]

My AI agent orchestrator grew into spaghetti: silent fallbacks, dropped issues, PR ping-pong burning Claude tokens. The fix came from Elm: a pure reducer that decides, an interpreter that does. Dropped issues are impossible by design. #buildinpublic #AI

[Mario Hayashi @logicalicy]

4/ Impossible by design.

The reducer handles every event type. The TypeScript compiler refuses to build if a case is missed. The "missing branch" bug that silently dropped issues for weeks can't be written anymore.