Automating a regulated application with a multi-agent system

A regulated application costs what it costs because of the seats, not the typing: seven stages, each a handover, documentation written last from memory, and an audit that has to reconstruct who verified, who decided and what the evidence was.

This tutorial shows how to give every seat to an agent and keep a person at every gate. Ten Claude Code agents, three skills and one workflow script specify, build, test, verify, document and release a small Symfony API from a requirements document, then maintain it from its logs and its request inbox. The orchestrator never writes code. The tester never reads the diff. The verifier starts fresh. The tag, the merge and the push stay yours.

Four chapters: the typical workflow of a regulated application (three flows, seven stages), the TicketFlow demo (build, maintenance and release flows on one-screen diagrams), the fundamental concepts (what a skill, an agent and a workflow are in Claude Code), and how to build your own skills and agents from your own process.

What a fresh session did on the demo with nothing but /improve, on 2026-10-15: two rounds, three bugs fixed, two feature requests shipped, eight decisions asked and answered, every item passed on its first verification; round one took 27 minutes, round two 9, the release 10. The numbers are in the tutorial repository.

Chapters

• 0:00Agents build, people decide
• 0:381. Three flows: build, maintenance, release
• 1:27Seven stages, and the three rules of separation
• 2:39Where the cost is
• 3:142. The TicketFlow demo: the kit at a glance
• 4:05The build flow: /build from a URS
• 5:37The maintenance flow: /improve from logs and requests
• 7:08The release flow: /release to a validation dossier
• 8:27Decisions belong to people
• 9:183. What is a skill
• 10:05What is an agent
• 11:12What is a workflow
• 12:274. Your own kit in seven steps
• 13:54Adapt one file, not ten roles
• 14:35Close

Links

The demo repository (public, clone it and run the three flows)

• https://github.com/scheffershen/youtube-multi-agent-development-with-claude-code
• Branches: `main` (the complete module after `v0.4.0`), `demo/round-1-example` (one bug fixed by the maintenance loop, with the report and the token cost of each role), `build/urs-002` (the SLA module built from a URS, three releases with changelog, flash info and validation dossiers)
• The planted-bugs starting point: commit `f443dc7`

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