Works with the AI Agents you already use
Claude Code
Cursor
Codex CLI
Muse
Dots+22 moreClaude CodeCursorCodex CLIMuseDots
OpenClaw
Manus
Grok
Grok Bot+18 agentsSellable Agent Skill Builder
Turn an idea, prompt, GPT, or Gemini Gem into a tested SKILL.md package and a marketplace listing that converts, with demand checked first.
$49
Sellable Agent Skill Builder
Example session with this skill installed
I've got a Gemini Gem I use to write Etsy listings for my printable planners. It works great for me. Can I turn it into a skill and sell it? Here are its instructions: "You are an Etsy SEO expert. Write a title under 140 characters, 13 tags, and a description for the product I describe. Be friendly."
- Read your context and instructions
- Compiled the sellable agent builder
Verdict: RESHAPE
Buyer sentence: Etsy sellers of digital downloads pay for this when they list a new product, and they get a search-optimized title, 13 tags, a description, and image briefs.
Plain-prompt gap: Small as written. The Gem is a persona plus three format rules, and any chatbot produces a passable title and tags from one sentence. A buyer won't pay for that.
Moats to add:
1.
Method: research buyer search phrases first, then build the title around the top phrase, then fill tags with distinct long-tail phrases (no repeats of title words that waste tag slots).
2.
Domain rules: Etsy's 140-character title and 13-tag/20-character limits, plus digital-download disclosure ("No physical item will be shipped").
3. Verification: a self-check that counts characters, flags duplicate tags, and flags trademarked terms.
4. Assets: a description template (hook → what's included → how it works → file details → FAQ).
Closest competitors: general "product listing" writers and listing gates. Most don't apply Etsy's tag rules or digital-download specifics.
Angle: "Etsy listings for digital downloads that follow the platform's limits and are built around what buyers actually search, verified before you paste."
Skill design
- Archetype: Builder
- Name:
etsy-digital-listing-builder
Description: "Write Etsy listings for digital downloads that get found: a 140-character title built on the top search phrase, 13 non-overlapping tags under 20 characters, a structured description with the digital-download disclosure, and image briefs, all checked before you paste. Use when the user says 'write my Etsy listing', 'Etsy tags for my printable', or 'optimize my Etsy title'. Do not use for physical products or Amazon/Shopify listings."
- Files:
SKILL.md: 4-phase workflow (intake → search phrases → write → verify)references/etsy-rules.md: limits, disclosure wording, trademark cautionsreferences/tag-strategy.md: long-tail tag method, with a worked exampleassets/description-template.md
Output contract: Title (with character count) · 13 tags (table with character counts) · Description · 5 image briefs · Self-check table
Price: $9
A single-platform builder bought on impulse. Comparable listing writers sit at $5–9. Raise it to $14 if you add a bulk mode (10 listings at once) or shop-wide tag auditing.
Next steps
Approve the design and I'll write the full package (Phase 3), run the self-check (Phase 4), and write the listing (Phase 5).
Connects securely to your tools. The creator never sees your data.
About this skill
Most skills don't sell because they fail one test: a buyer could get the same result by typing one sentence into a chatbot. This skill makes sure yours passes that test before you build it, then takes you all the way to a listing that's ready to upload.
What it does
- Validates the idea first. It writes the buyer sentence, runs a Plain-Prompt Test, scans the competition, and gives a BUILD / RESHAPE / SKIP verdict along with the angle worth paying for.
- Designs the skill. It picks the archetype (Builder, Gate, Library, Workflow), writes the trigger description that decides when agents load it, and plans the references and output contract.
- Writes the package. You get SKILL.md, reference files, and templates, laid out for progressive loading.
- Checks quality and security. It checks structure, does dry runs on happy-path, thin, and out-of-scope prompts, scans for exfiltration, hidden instructions, and secret requests, and audits claims for honesty. Verdict: SHIP / REVISE.
- Writes the listing. You get the name, summary, description, a complete demo, tags, an FAQ, and a price backed by comparables.
Converts what you already have
Custom GPTs, Gemini Gems, Claude Projects, and long prompts are tied to one platform. This turns them into a portable SKILL.md for Claude Code, Codex CLI, Cursor, Copilot, Gemini CLI, and other compatible agents. It also adds the method and trigger description those platforms never required.
What you get
- An idea verdict with a positioning angle
- A complete skill folder, ready to zip
- A self-check report
- Paste-ready listing copy and a price recommendation
Who it's for
Creators selling on skill marketplaces, consultants and domain experts packaging their method, and anyone turning a favorite prompt or Gem into a product.
Built by a creator with 95+ live skills on Agensi. The workflow is the one used to build and list them.
Limits
It doesn't guarantee sales and won't invent reviews, install counts, or claims. It doesn't build MCP servers or app code.
How to use
Skills on Agensi run inside your AI agent. Copy the prompt, paste it into your agent, and it connects to Agensi and installs this skill for you. If a payment is needed, your agent shows it to you first.
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- Passed all security checks, Safe to install