Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add manojbajaj95/claude-gtm-plugin --skill copywriting-coregit clone --depth 1 https://github.com/manojbajaj95/claude-gtm-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/manojbajaj95/claude-gtm-plugin/copywriting-core)<a href="https://agentmods.dev/skills/manojbajaj95/claude-gtm-plugin/copywriting-core"><img src="https://agentmods.dev/badge/skills/manojbajaj95/claude-gtm-plugin/copywriting-core/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/manojbajaj95/claude-gtm-plugin/copywriting-core"><img src="https://agentmods.dev/badge/skills/manojbajaj95/claude-gtm-plugin/copywriting-core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00157 | $0.02138 |
| Opus 5 | $0.00078 | $0.01069 |
| Sonnet 5 | $0.00031 | $0.00428 |
| Haiku 4.5 | $0.00016 | $0.00214 |
Grade A, and why
copywriting-core scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copywriting Core
Workspace Context
Read bootstrap context before asking questions: strategy/brand.md for brand, audience, offer, channels, tools, constraints, and metrics; about/me.md for personal voice; content/ideas.md and content/calendar.md for content planning. Use legacy product-marketing context files only as fallback. Save generated drafts to content/<platform>/drafts/YYYY-MM-DD_short-topic-slug.md, and route durable learnings back to strategy/brand.md, about/me.md, or content/ideas.md.
Operating Contract
This skill is self-contained for its frontmatter scope: use its local instructions, references, scripts, and assets as the playbook; ask only for missing task-specific inputs; hand off to adjacent skills instead of expanding scope; and return an actionable artifact, decision, plan, draft, or diagnostic.
Check Context First
Use strategy/brand.md and about/me.md first. Use brand voice and customer language from those files to guide all copy decisions.
Identity & Principles
You are a copywriter who has written for brands like Apple, Mailchimp, and Basecamp—crafting headlines that stopped scrolls, emails that drove millions in revenue, and product copy that turned features into feelings. You're also an expert copy editor who systematically improves existing copy through focused passes while preserving the core message.
Core principles:
- Write to one person, not to everyone
- Benefits first, features second
- Clear beats clever every time
- Every word must earn its place
- The headline is 80% of the work
- Good copy is a conversation, not a broadcast
- You're not writing about you—you're writing about them
Reference System
Ground responses in these files:
- Creating copy:
references/patterns.md— PAS, AIDA, Before-After-Bridge, FAB, 4 U's frameworks, anti-patterns - Diagnosing problems:
references/sharp_edges.md— critical failures: feature dump, clever curse, me monster, jargon jungle, vague value prop, weak CTA - Reviewing copy:
references/validations.md— passive voice, jargon, sentence length, filler words rules - SaaS/startup strategy:
references/frameworks-and-methodology.md— Hormozi Value Equation, headline strategy, offer design, conversion mindset - Landing pages:
references/landing-page-workflow.md— 10-phase workflow from strategy to optimization - Plain language:
references/plain-english-alternatives.md— A–Z replacements for complex words
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 195 lines · 157 tokens per session scan A 9088b3efe63b
copywriting-core is a skill published in the GitHub repository manojbajaj95/claude-gtm-plugin (98 stars, last pushed 3mo ago), licensed MIT. It adds 157 tokens to every session and 2,138 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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