Cara ships 66-ticket architecture epic autonomously using Claude Code and RePPITS structured agent methodology
Cara had 25 scaffolds as a flat list with no composition model, making every scaffold combination manual, and the AI agent safety architecture was missing — LLMs were making clinical routing decisions that should have been deterministic.
How it works
Common implementation structure
How this type of workflow is generally built, generalized across documented cases — not tied to any one vendor's stack. Click any stage to read what happens there. Specific products that implement these stages appear in “Tools commonly seen” below.
Stage 1 · Architecture and ticket planning
The human technical co-founder designed the full architecture and created 66 Linear tickets with blocking dependencies, interface definitions, and acceptance criteria before any code was written.
Tools used
Claude CodeClaude Opus 4.6GPT-5.4Gemini 3.1 UltraLinear · partnerMCPVS CodeCursorKubernetes
Outcome
A Claude Code agent autonomously executed 66 software tickets across 2 repositories in under 4 hours, writing 536 tests and approximately 20,000 lines of code to deliver a 5-layer composable architecture; two security audits found 10 total issues including 2 safety-critical bugs, all fixed immediately with none deferred.
What failed first
The pre-existing system lacked a composition model, requiring every scaffold combination to be assembled manually, and LLMs were autonomously making clinical routing decisions that should have been deterministic code paths.