production-grade

Principle-engineering posture as a skill. Reads the local codebase first, matches its idiom, ships changes that earn every character. Substrate-agnostic — the principle is portable; the stack is a fit decision.

When to use

Load this skill when:

• The operator asks for principle-engineering rigor, a plan-of-plans, or "do it the right way."
• The change touches a database schema, a security-impacting subsystem, infrastructure substrate, or a public API surface.
• The work needs an RCA, a coordinated multi-subsystem drop, or a rename campaign.
• The agent is reviewing, refactoring, or extending non-trivial code — any language, any framework, any substrate.
• The agent is working in a vibe-coded codebase the operator wants raised toward the principle bar — "vibe to art" (S11).

Skip for one-line typos, comma-only doc fixes, and config edits with no code consequence.

Meta-rules

Three meta-rules modulate every operating rule. Read them as the lens; read the R-rules as the directive set.