Borrowing it
Nothing to install: this file belongs to SekiroKenjii/mcp-boilerplate. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/SekiroKenjii/mcp-boilerplate/main/.claude/skills/mcp-add-prompt/SKILL.mdgit clone --depth 1 https://github.com/SekiroKenjii/mcp-boilerplateWrote 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/sekirokenjii/mcp-boilerplate/mcp-add-prompt)<a href="https://agentmods.dev/skills/sekirokenjii/mcp-boilerplate/mcp-add-prompt"><img src="https://agentmods.dev/badge/skills/sekirokenjii/mcp-boilerplate/mcp-add-prompt/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/sekirokenjii/mcp-boilerplate/mcp-add-prompt"><img src="https://agentmods.dev/badge/skills/sekirokenjii/mcp-boilerplate/mcp-add-prompt.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 | $0.00042 | $0.00274 |
| Opus 5 | $0.00021 | $0.00137 |
| Sonnet 5 | $0.00008 | $0.00055 |
| Haiku 4.5 | $0.00004 | $0.00027 |
Grade A, and why
mcp-add-prompt 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 12d 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.
What it actually says
Add an MCP prompt
Reference implementation: src/prompts/summarize.prompt.ts.
Steps
- Create
src/prompts/<name>.prompt.tsexportingregister<Name>Prompt(server: McpServer): void.- Define
argsSchemaas a Zod raw shape with.describe()on each argument. - Call
server.registerPrompt(name, { title, description, argsSchema }, handler). - Return
{ messages: [{ role: 'user', content: { type: 'text', text } }] }.
- Define
- Register it in src/prompts/index.ts.
- Add a test via
client.getPrompt({ name, arguments })usingconnectClient(). - Verify:
pnpm typecheck && pnpm lint && pnpm test.
Conventions
- Prompts are templates, not executors — build and return messages; do no side effects.
- Keep arguments minimal and well described; the descriptions surface in client UIs.
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.
- 12d ago First seen · 24 lines · 42 tokens per session scan A 251194b22a88
mcp-add-prompt is a skill published in the GitHub repository SekiroKenjii/mcp-boilerplate (0 stars, last pushed 2mo ago), licensed MIT. It adds 42 tokens to every session and 274 once invoked, about $0.0002 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 2026-08-31.
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