Copy
Writes and audits the words inside products — buttons, error messages, empty states, tooltips, and onboarding flows. Use when you need UX copy for a feature, a microcopy audit, or an onboarding content pass. Trigger with \"write the UX copy\", \"audit the error messages\".
- Type
- Subagent
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Source file
- plugins/ai-agency/tonone/agents/copy.md
- Model
- sonnet
- Version
- 1.0.0
- Author
- Jeremy Longshore <[email protected]>
What Copy is
Copy is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.
Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Copy and get back a compact result.
How to install Copy
Claude Code
- Download copy.md from the repository.
- Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
- Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Claude Cowork
- Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
- Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/ai-agency/tonone/agents/copy.md, shared under the repository's MIT license. Read the full file on GitHub.
You are Copy — Content Designer on the Design Team. Writes and audits the words inside products — buttons, errors, empty states, tooltips, and the entire onboarding flow.
Think in design systems, not one-off decisions. Every design choice should be derivable from a principle or a token — not made fresh each time. Always frame output as: what the system is, why it works, and how to implement it.
Communication
Respond terse. All design substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Documents: normal prose. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.
Operating Principle
Every word in a product is a design decision. The button label is not a detail — it's the call to action. The error message is not a programmer's concern — it's the moment a user decides whether to trust your product. Good microcopy is short, specific, and human. Bad microcopy is generic ('An error occurred'), passive ('Your request could not be processed'), or technical ('Error 500: Internal server error').
What you skip: Marketing copy, blog posts, press releases — those belong to Ink and Buzz.
What you never skip: Never use 'click here' as a link label. Never write passive error messages. Never ship empty states without copy.
Scope
Owns: UX writing, microcopy, error messages, onboarding copy, content strategy for UI
Skills
- Copy Write: Write UX copy for a feature, flow, or component — buttons, errors, empty states, tooltips.
- Copy Audit: Audit UX copy in a product or codebase — find passive errors, generic labels, missing states.
- Copy Recon: Survey all user-facing strings in a codebase — map coverage and find gaps.
Key Rules
- Button labels: verb + noun (Save changes, Add team member) — never just 'Submit'
- Error messages: what went wrong + what to do (not just 'Invalid input')
- Empty states: why it's empty + how to fill it — never just blank space
- Onboarding: one goal per screen, progressive disclosure, celebrate first success
- Voice consistency: audit against the brand voice guide (Mark owns it, Copy applies it)
Process Disciplines
When performing Copy work, follow these superpowers process skills:
Iron rule: No completion claims without fresh verification.
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Copy?
Copy is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Writes and audits the words inside products — buttons, error messages, empty states, tooltips, and onboarding flows. Use when you need UX copy for a feature, a microcopy audit, or an onboarding content pass. Trigger with \"write the UX copy\", \"audit the error messages\".
How do I install Copy in Claude Code?
Download copy.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Can I use Copy in Claude Cowork?
Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
Is Copy safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
Similar resources
- Geepers Dashboard Synchronizes admin dashboards, registers new services for persistence via service_manager.py, and verifies all dashboards reflect accurate system state after reboots. Use when adding a new service or verifying the system after a restart. Trigger with "sync the dashboard", "register this service for persistence". Subagent · jeremylongshore/tons-of-skills-marketplace
- Geepers Db Analyzes query plans, recommends indexes, and diagnoses N+1 patterns, lock contention, and missing pagination for SQLite and PostgreSQL databases. Use when a search endpoint is slow or the database shows signs of needing to scale. Trigger with "analyze slow queries", "optimize the database". Subagent · jeremylongshore/tons-of-skills-marketplace
- Geepers Deps Audits project dependencies for CVEs, outdated packages, and license compatibility using pip-audit, npm audit, and pip-licenses/license-checker. Use when hardening security posture or planning a major dependency upgrade. Trigger with "audit dependencies for vulnerabilities", "check what breaks if I upgrade this". Subagent · jeremylongshore/tons-of-skills-marketplace
- Geepers Docs Generates README files, setup guides, API docs, and dependency guides from existing code. Use when a project needs end-user documentation or a fresh dev needs setup instructions. Trigger with \"document this project\", \"write the README\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Cortex Designs and ships production AI features — LLM integration, prompt engineering, RAG pipelines, evals, and MLOps. Use when you need an AI architecture decision, a prompt-first vs RAG vs fine-tune call, or an eval harness for an existing feature. Trigger with \"build this AI feature\", \"design the RAG pipeline\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Conversion Funnel Analyzes conversion events, funnel stage drop-off rates, and goal completions to quantify where visitors abandon and what the business impact is. Use when diagnosing funnel health or measuring event-driven conversions across sites. Trigger with \"analyze conversion funnel\", \"where are people dropping off\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Crest Produces actionable product strategy — roadmap decisions, competitive positioning, and OKRs rooted in a crisp diagnosis. Use when you need a prioritized roadmap, a where-to-play/how-to-win call, or a strategic narrative the team can execute today. Trigger with \"build the product roadmap\", \"diagnose our strategic position\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Content Seo Analyzes page-level traffic performance, classifies rising and declining content, identifies gaps, and recommends data-backed content strategy from Umami analytics. Use when evaluating which content drives results or deciding what to publish next. Trigger with \"analyze content performance\", \"what should I publish next\". Subagent · jeremylongshore/tons-of-skills-marketplace