Operating context
Long-running production systems often depend on individual knowledge, while documentation drifts from deployed code. Large rewrites raise outage risk; postponement compounds maintenance and security debt.
The operating model must establish an accurate system map first, then validate small changes comparably across environments.
Deployment design
In read-only mode, Patty Code maps dependencies, data flows, unused code, and test gaps, then proposes a sequence of behavior-preserving refactors.
PCCP applies different rights and acceptance gates to headquarters, plants, simulations, limited production, and full production. A failed gate stops promotion.
Operating flow
- 01
The first phase changes no code. Site operators reconcile the generated system map with actual production practice.
- 02
Patty Code then pairs small changes with tests. Work advances from simulation to one limited site and expands only after operating results and error records are reviewed.
- 03
Targets, test data, site approvals, outcomes, and rollback decisions remain attached to the same change record for plant-by-plant comparison.
Pre-deployment validation
- Read-only analysis caused no writes to production
- Site-specific configuration informed impact analysis
- Promotion and stop conditions were defined in advance
- Results for the same change can be compared across environments