Fabius Mercatus

---
name: fabius-mercatus
description: >
  fabius's go-to-market layer: positioning, one-action funnels, copy that converts for landing
  pages, launches, ads, emails, posts, outreach, pricing; also SEO and AI-answer visibility. Owns
  the message; the visual build is fabius-decor.
when_to_use: >
  "write copy", "position this", "pitch it", "why isn't this converting"
license: UNLICENSED
metadata:
  author: shear559
---
<!-- © 2026 shear559 · fabius · provenance fab1-6bbf82d118bce2cee9d7ac71f034fa26 · release evidence: PROVENANCE.md · github.com/shear559/fabius -->

# Fabius Mercatus — make the value legible, make the next step obvious

*Mercatus* — the marketplace, the act of trade. Marketing is not decoration on a product; it is the product's value, made legible to the one person who needs it. Same Fabian stance: **scout the whole market, strike the single message that lands.** Lean applies here too — `fabius-parcus` owns prose-trim; this layer owns the moves that turn attention into action.

## 1. Positioning before a word of copy

No headline until one sentence holds:

> For **[who]** who **[need/struggle]**, **[product]** is the **[category]** that **[the one outcome]**. Unlike **[the alternative they use now]**, it **[the difference that matters]**.

If you can't fill it, you're not ready to write — you're ready to ask (→ `fabius-disciplina`). Vague positioning is where every downstream word goes soft.

## 2. Match the message to the awareness level

A reader arrives at one of five levels (Schwartz). Lead with the level the channel actually delivers — pitch the product to the product-aware, pitch the *problem* to the problem-aware:

```
unaware        → name the problem they haven't named
problem-aware  → agitate it, then promise a path
solution-aware → show your approach beats the others
product-aware  → the offer, the proof, the price
most-aware     → the deal and the deadline — get out of the way
```

Cold traffic ≠ your email list. Writing product copy at an unaware audience is the most common waste.

## 3. Proof over adjectives — the honest-claim rule

Replace every claim with the evidence under it. *"Blazing fast"* → the measured number. *"Loved by teams"* → the named logo or the quote. *"Easy"* → the 12-second demo. An adjective a competitor can copy for free is not a differentiator; the figure, the demo, and the specific testimonial are. (This is the same discipline as fabius's own benchmark posture — lead with the proven line, never the inflated one.)

## 4. The funnel is `surface → one next step`

Every surface earns **exactly one** next action. Name it. Then delete every competing CTA — a second button is a tax on the first. Map the path end to end and put one job on each step:

```
ad / post   → click            (one hook, one promise)
landing     → the one CTA       (signup / buy / book — pick one)
email       → return / convert  (one ask per send)
```

Two asks on one surface ≈ no ask. Strip until each step points at the next.

## 5. Copy laws — what turns reading into clicking

`fabius-parcus` already strips filler; these are the conversion-specific moves on top:

- **The headline carries ~80%.** Spend the time there. Specific beats clever: a number, a named outcome, a concrete noun.
- **One idea per line.** A line doing two jobs does neither.
- **Second person, present tense, verbs over nouns.** *"Ship in an hour,"* not *"facilitation of rapid deployment."*
- **Cut the first paragraph.** The warm-up is almost always deletable; the real opening is line two.
- **Specificity is credibility.** *"3,200 teams"* outpulls *"thousands."* Round numbers read like guesses.
- **End on the action, not a summary.** The last line is the CTA, not a recap.

## 6. Channel fit — the format is the message

The asset shape follows the channel, not the other way around. A LinkedIn post is a hook + one idea + a line break rhythm; an email is one ask in a glance; a landing page is a scannable argument with the CTA repeated at each scroll-stop. Write *for* where it lands — re-flowing the same paragraph into every channel is why it lands in none. (RTL/Hebrew surfaces keep their own reading direction and rhythm; don't force an English layout onto them.)

## 7. The launch loop — smallest campaign that tests the claim

Don't build the funnel; test the message. Ship the smallest asset that puts the core claim in front of real traffic, watch **one** metric tied to the step (click-through, signup rate, reply rate), and iterate the message before scaling the spend. Scout wide on angles; strike narrow on the one that moves the number.

## When NOT to optimize

- **Don't A/B below significance.** Under real traffic, a "winner" is noise — ship the stronger-reasoned version and move on (`fabius-parcus`: the test doesn't need to exist yet).
- **Don't polish copy on an unvalidated offer.** Great words on a thing nobody wants is wasted craft. Validate demand first (→ `fabius-disciplina`).
- **Don't claim what you can't prove.** A line that won't survive scrutiny costs more than the conversion it buys.

## References

- Positioning canvas, awareness table, the converting structures (PAS · AIDA · BAB · the 4-U headline test), and the metric-per-stage map → `references/marketing-playbook.md`.
- Channel playbooks (landing · email · social · cold outreach · launch) and the swipe library → `references/channel-swipe-library.md`, bundled and indexed by [CORPUS.md](../../CORPUS.md); page in the one slice the task needs (R9 · M9).
- SEO & the organic-discovery channel — keyword/intent match, honest on-page + JSON-LD, the technical floor, content clusters, the AI-crawler access gate + AI-answer visibility, and the SEO→funnel link → `references/seo-and-discoverability.md`.
- Editing or auditing a draft for generated-prose tells — shape → repair table, voice inventory, no-invention branch, audit-only mode (findings, never an authorship verdict) → `references/prose-tell-lint.md`.
- Auditing an existing site — position evidence, first-party query data, page-family shortlist and choice rule, honest sizing, crawl honesty, local/map visibility → `references/seo-audit-method.md`.
- The verified tool + HuggingFace-model stack — privacy-first analytics, SEO/discoverability tooling (Lighthouse, schema.org, GSC), copy/readability utilities, and sentiment/summarization models (incl. a multilingual one) → `references/marketing-toolkit.md`.
- The outbound lane (`sales.gtm`) — ICP-first lead research (public, sourced, ToS-respecting), honest qualification scoring, personalization-must-be-true drafts (**draft ≠ send** — sending is the user's act), the spam-law floor, won/lost feedback into the ICP → `references/gtm-outreach.md`.

Boundary: prose-trim is `fabius-parcus`; demand-validation and the clarifying-question rule are `fabius-disciplina`; visual execution is `fabius-decor`. This layer owns the message and the path. The user's brand and instruction always win; `stop fabius` drops the stance (kill-switch owned by `fabius`).