Write HVAC Authority Content

Use this skill when authoring, expanding, or auditing technical HVAC articles and product entries in the HVAC Astro content tree.

Core Rules

Target Category Hierarchy: Posts must be placed inside one of the 7 designated category folders (gia-ca, huong-dan, kien-thuc, kinh-nghiem, mua-sam, review, so-sanh). Never save directly at src/data/post/.
Answer-First BLUF: Every article must include a quantitative summary block (> **Answer-first:**) under 60 words directly beneath frontmatter and imports.
Empirical Rigor: Ground technical claims in TCVN 7830:2021 (CSPF), ASHRAE 55-2023, electrical tests (Hioki power meter, kWh/night), or acoustic tests (RION NL-52, dB(A)). Avoid unsubstantiated marketing buzzwords.
E-E-A-T Personas: Attribute content to registered engineering personas (e.g., "Kỹ sư Điện lạnh Nguyễn Văn Hùng") with clear technical credentials.
Silo Linking: Include minimum 3-4 internal cluster links plus at least 1 direct link to a related model page in src/data/product/.
Anti-Slop Gate: Validate against anti_slop_gate: { gate_passed: true, verified_by: "Content Manager" }. Zero filler phrases or repetitive AI transitions.