We use cookies
We use cookies to analyze traffic and improve your experience. Learn more
Level: Free Duration: ~15 minutes You need: Free claude.ai account + a Skill ZIP (in your Neurolinker account)
Anthropic trained Claude specifically on XML-tagged text. XML works because it creates clear boundaries inside the prompt. Without tags, Claude has to guess what part is the task, what part is context, and what part is an example. With tags, there's no guessing.
<instructions> — the main task<instructions>
You are a copywriter specializing in natural skincare brands.
Your task is to write 3 Instagram caption variants, max 150 characters each.
</instructions>
<context> — the background<context>
Brand: Lune Cosmetics, founded in Berlin, vegan and cruelty-free products.
Audience: women 25–40, environmentally conscious.
DO NOT mention: "100% natural" (regulatory compliance issue).
</context>
<example> with <input> and <output> — few-shotPractical rule: 2 good examples > 10 generic instructions.
<thinking> — thinking out loudUseful when the task requires analysis before generating. You ask Claude to think inside the tag and deliver the final answer outside it.
<format> — response structure<format>
Return the response as valid JSON with this structure:
{"variants": [{"id": 1, "copy": "...", "hook_type": "question|stat|emotion"}]}
</format>
A Skill is a ZIP-compressed folder that gives Claude a permanent "specialization". Inside is a SKILL.md file with the instructions. Unlike a Project, a Skill works globally across your account: upload it once in Settings → Capabilities → Skills and invoke it with / in any chat. Works on the Free plan.
my-copywriter-skill/
├── SKILL.md ← required
└── examples/ ← optional
/ to activate it.Mini-project: create an "Instagram Hook Generator" Skill in 8 minutes. Create a folder, write a SKILL.md with XML-formatted instructions inside, compress to ZIP, and upload to Claude.
| Feature | Project | Skill |
|---|---|---|
| Scope | One conversation thread | All conversations |
| Heavy files | Yes, in Knowledge Base | No |
| Best for | Specific client | Repeatable task |