Write access to the source code management (SCM) system is treated as high risk and tightly controlled; proposed changes follow the organisation's defined SDLC process; and in a mature process developers propose patches which a different developer reviews before merging. Code analysis tools catch common mistakes, tuned so that false positives do not flood developers and cause alert fatigue.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.