For EU-based solo developers doing client work in 2026, the procurement-defensible AI-tool posture turns on client-code data residency rather than on Cursor-vs-Copilot-vs-Claude-Code feature comparison. All three dominant AI coding tools support EU data residency at Enterprise tiers (Copilot via Microsoft Azure OpenAI EU regions, Cursor via configurable LLM provider routing, Claude Code via Anthropic API EU-region availability). Three contract clauses now appear in regulated EU client agreements: client-code-non-transmission, EU-residency requirement, and sub-processor disclosure. The procurement-defensible workflow has five steps: AI-tool inventory, per-client risk assessment, configure tools per client, document configuration in engagement contract, audit quarterly. Three scenarios where the right answer is to disable AI tooling entirely: explicit contract prohibition that cannot be negotiated, embedded regulated data in the codebase, national-security or jurisdictionally-sensitive code.

Reframed from saturated Cursor-vs-Copilot comparison to the EU client-code-residency angle that the saturated category misses. Cohort: solo developer / freelance contractor doing EU client work, particularly with regulated-sector clients (financial services under DORA, healthcare under EHDS, public sector, legal). Cadence 60-day. Trigger conditions: AI Office or national supervisory authority publication of specific guidance on AI coding tools and EU residency; landmark enforcement action establishing GDPR Article 28 precedent for AI-tool processing chains; product-tier changes at GitHub Copilot, Cursor, or Claude Code that materially change residency-configuration landscape. Sister claims: OPS-014 (vendor due diligence), OPS-052 (NL solo legal — parallel professional-services case), OPS-056 (bootstrapped SaaS cost discipline).