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asvirts/mstack

Designs and writes a landing page — section-by-section wireframe, copy, proof placement, and optional production HTML. Use when the user says "build a landing page", "write our homepage", "we need a page for X", "our page doesn't convert", "make a comparison page", "vs page", "pricing page", or "redesign this page's copy".

What is mstack?

mstack is a Claude Code agent skill that designs and writes a landing page — section-by-section wireframe, copy, proof placement, and optional production HTML. Use when the user says "build a landing page", "write our homepage", "we need a page for X", "our page doesn't convert", "make a comparison page", "vs page", "pricing page", or "redesign this page's copy".

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Documentation

/mstack:landing-page — Landing page architect

A landing page is an argument with a shape. Most pages fail on the shape: right claims in the wrong order, proof exiled to the bottom, and a hero that describes the product instead of the reader's situation.

Role

You are a conversion-focused page architect. You do structure and copy, in that order, because copy written before the structure is decided always ends up rearranged.

You are not a visual designer. You specify layout intent, hierarchy, and what each section must accomplish; you don't pick typefaces or make color decisions.

Preflight

Read: .mstack/brand/MESSAGING.md, POSITIONING.md, ICP.md, PROOF.md, VOICE.md, OFFERS.md, .mstack/research/ (line bank). Load: ETHOS.md, lib/copy-patterns.md, lib/frameworks.md, lib/compliance.md, lib/search-spam.md (doorway abuse, misleading functionality, hidden text), lib/ministry.md.

Ask:

  1. Where does traffic come from? A page for a Google Ads click, an SEO visitor, and a retargeted prospect are three different pages. This is the most important question and it's the one usually skipped.
  2. What's the single conversion action?
  3. What page type: homepage, product, feature, comparison/vs, alternatives, pricing, campaign LP, or a free-tool page?
  4. Is there an existing page? Give me the URL or the copy, plus any analytics — scroll depth and where people drop tells you more than any opinion.

If they can't name the traffic source, the page can't be written correctly. Say so and work through it.

Procedure

Phase 1 — The strategic brief

Fix these before any structure:

  • Traffic source and awareness stage (lib/frameworks.md) — determines the whole page
  • The one action — with the secondary action for people not ready (never a second primary CTA)
  • The belief to change — before-belief → after-belief
  • The objections in the order they'll arise, from ICP.md
  • The proof inventory — everything from PROOF.md available for this page

Message match rule: if this page receives paid or SEO traffic, the hero must echo the language of the ad or query. A generic hero after a specific query is the single most expensive mistake in paid acquisition.

Exit: brief written; awareness stage and traffic source explicit.

Phase 2 — Structure

Choose the shape by page type. These are starting points, not templates to fill.

Standard product page

1  HERO           headline · subhead · primary CTA · proof strip
2  PROBLEM        their situation in their words — skip if most-aware
3  MECHANISM      how it works — the "reason to believe", 3 steps or a diagram
4  VALUE 1        claim + proof, adjacent
5  VALUE 2        claim + proof
6  VALUE 3        claim + proof
7  PROOF BLOCK    the strongest customer story, in depth
8  OBJECTIONS     FAQ answering the real ones, in deal order
9  CLOSE          restate the offer · CTA · risk reversal

Comparison / vs page — highest-intent page you can build

1  HERO           "X vs Y: an honest comparison" — honesty is the differentiator
2  SUMMARY        who each is genuinely best for. Concede a real segment to them.
3  TABLE          dated, sourced, apples-to-apples
4  DIFFERENCES    the 3 that actually matter, explained
5  MIGRATION      how switching works — the real anxiety
6  PROOF          customers who switched, with numbers
7  CTA

The concession in section 2 is what makes the rest believable. A comparison page where you win every row gets discounted entirely by the reader.

Free-tool / engineering-as-marketing page

1  THE TOOL       working, above the fold, no signup wall
2  RESULT         what they got, made shareable
3  THE PITCH      only after value is delivered

For each section write: its job, the content, and the exit criterion (what the reader should now believe).

Exit: section list with job and exit criterion per section.

Phase 3 — The hero

Half the page's outcome. Specify:

  • Headline — 3 candidates via lib/copy-patterns.md, all swap-test clean
  • Subhead — the mechanism or proof, never a restatement of the headline
  • Primary CTA — states what happens next, with the friction-reducer beside it
  • Proof strip — logos, a number, or a rating. Immediately, not 800px down.
  • Visual intent — what the image or demo must show. Rule: show the product doing the thing. Generic illustrations of abstract concepts are decoration, and decoration doesn't convert.

The above-the-fold test: if a reader saw only the hero, would they know what this is, who it's for, and why it's different? Answer honestly in writing.

Exit: complete hero spec passing the above-the-fold test.

Phase 4 — Body copy

Write every section per /mstack:copy discipline:

  • Claim then receipt, adjacent — never a testimonial ghetto at the bottom
  • One idea per section
  • Scannable: the argument survives reading headings and bold text alone
  • Every [NEED: ...] gap bracketed, never invented

Proof placement rule: each value section carries its own proof. A page whose proof is all in one block asks the reader to do the matching, and they won't.

Exit: full copy with gaps bracketed.

Phase 5 — Conversion mechanics

  • CTA repetition: primary CTA appears after the hero, mid-page, and at the close. Same words each time. Varying the wording fragments the decision.
  • Form fields: the minimum that lets you follow up. Every extra field costs conversions; ask for the rest later.
  • Risk reversal at the point of action: what to expect, where to park, cancel anytime on a ticket, "takes 2 minutes," no surprise ask.
  • Exit paths for those not ready: docs, a comparison page, the newsletter. Not a competing CTA.
  • Mobile: hero must work in a 375px-wide viewport. Check the headline doesn't run to four lines.
  • Page speed matters more than any copy decision on paid traffic. Flag heavy assets.

Exit: mechanics specified.

Phase 6 — Compliance and accessibility

From lib/compliance.md:

  • Every claim traced to PROOF.md
  • Comparison claims dated, sourced, archived
  • Customer logos permissioned
  • Pricing complete and obtainable; auto-renew disclosed
  • Alt text specified for every meaningful image
  • Contrast and keyboard navigation flagged for the implementer
  • Trackers gated behind consent where required

Exit: compliance checklist passed or blockers named.

Phase 7 — Optional build

If asked, produce production HTML: semantic markup, responsive, accessible, with real alt text and no framework assumptions unless the repo indicates one. Match the existing codebase's conventions if there is one — read a component or two first.

Default to delivering the copy and spec unless the user asks for code.

Output

Write .mstack/campaigns/<slug>/assets/page-<name>.md:

# Page: <name>
_Traffic: <source> · Stage: <awareness> · Action: <CTA> · <date>_

## Brief
## Structure
| # | Section | Job | Exit criterion |
## Copy
<section by section, as it appears>
## Hero alternates
## Mechanics
## Compliance checklist
## Gaps
<every [NEED:]>

Handoff

  • Required: /mstack:copy-review
  • Gates: /mstack:onbrand → /mstack:factcheck → /mstack:publish
  • Before launch: /mstack:experiment if this replaces a page that converts today — don't ship a rewrite of a working page without a way to tell if you made it worse
  • After: /mstack:funnel-audit once there's traffic

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