Pre-Flight Check

Run every section in order before delivering anything. A failing gate stops delivery — fix it or flag it, never ship past it.

1. Truth check

• Trace every name, quote, number, and factual claim to a real source retrieved this session. If it does not trace, delete it or flag the gap to the owner — never fill gaps with invention.
• Invented example material is allowed only when openly labeled as invented on every surface where it appears (visible caption, not just alt text).
• Ban hype unless the owner wrote it: "free forever", "live now", license claims (e.g. MIT) that were not specified.
• Public material contains no owner-internal names, machine details, or private infrastructure references.
• Check deliverables AND their source files for text in a language the owner did not request (e.g. watermarks burned into generated images). Crop or regenerate before use.

2. Copy pass

• Use direct-response, human phrasing throughout — headlines AND body copy, not headlines only.
• Write product/skill names in Title Case everywhere.
• Read the actual source material before summarizing it; state the real point, not a plausible one.

3. Visual verification (for anything rendered)

• Enumerate the page's breakpoints first (grep -oE "max-width: *[0-9]+px|min-width: *[0-9]+px"), then screenshot at: desktop width (1440px), true phone width (390px), the owner's actual window width if known, one width inside every gap between breakpoints, and one pixel either side of each breakpoint value. A page that passes at 390 and 1440 can still be broken at 690 — mid-width bands are where absolute-positioned elements collide with stacked layouts.
• Verify overlaps with geometry, not eyes: getBoundingClientRect() intersection tests between every floating/decorative element and every text, button, and card, at every tested width. Check scrollWidth <= innerWidth for horizontal overflow.
• Frozen frames: occluded tabs freeze CSS mid-transition while computed styles show the final state. Take two screenshots 2–3 seconds apart before judging; never declare an element missing from a single capture.
• Follow references/mobile-visual-audit.md for the true-phone-width harness, and references/responsive-breakpoint-audit.md for the sweep method, overlap snippet, and the CSS traps (mismatched breakpoints, transform-centering vs. animation).
• Fix every cut-off, overflow, overlap, or invisible element, then re-shoot. Clean means clean at every tested width.

4. Links and claims

• Verify every button and link resolves (curl or fetch each href).
• Match counts and lists in copy against reality (platform counts, item counts — "twelve skills" must be twelve).

5. Versioning (for iterated projects)

• Never overwrite. Before changes: snapshot to versions/vN/ with a VERSION file. After changes: add a CHANGELOG entry and bump any visible version footer.

6. Review team

• When the owner has authorized subagent use, dispatch a reviewer subagent before delivering. Give it measurable acceptance criteria — exact viewport widths, the element lists that must not overlap, pixel tolerances, required evidence (geometry measurements + screenshot paths) — not "look it over." A review without numbers is an opinion, not a gate.
• Fix every blocker it finds; fix nits or consciously waive them with a reason.
• Never present work as reviewed that was not.

7. Delivery honesty

• Build what was asked, literally. Do not add containers, frames, sections, or structure the owner did not request — if an instruction is ambiguous, ask before improvising structure around their content.
• State in the final reply: what was done, what was verified (and how), what failed, what remains unverified. No confident language over unverified work.