Borrowing it
Nothing to install: this file belongs to wmt-mobile/localnest. 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/wmt-mobile/localnest/main/.claude/skills/localnest-mcp-runtime/SKILL.mdgit clone --depth 1 https://github.com/wmt-mobile/localnestWrote 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/wmt-mobile/localnest/localnest-mcp-runtime)<a href="https://agentmods.dev/skills/wmt-mobile/localnest/localnest-mcp-runtime"><img src="https://agentmods.dev/badge/skills/wmt-mobile/localnest/localnest-mcp-runtime/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/wmt-mobile/localnest/localnest-mcp-runtime"><img src="https://agentmods.dev/badge/skills/wmt-mobile/localnest/localnest-mcp-runtime.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 | $0.00035 | $0.00375 |
| Opus 5 | $0.00017 | $0.00187 |
| Sonnet 5 | $0.00007 | $0.00075 |
| Haiku 4.5 | $0.00003 | $0.00038 |
Grade A, and why
localnest-mcp-runtime 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 10d 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
LocalNest MCP Runtime
Use this skill when touching:
scripts/runtime/src/mcp/src/app/- client config generation or setup and doctor flows
Quick Start
- Test the installed CLI path, not only the repo source path.
- Treat setup, doctor, and server startup as separate runtime surfaces.
- Prefer explicit warnings and controlled fallback over raw module errors.
Workflow
1. Reproduce on the runtime surface
Choose the narrowest entry point:
localnest setuplocalnest doctorlocalnest start- MCP tool status and index tools
2. Check import timing
For runtime compatibility bugs, inspect:
- barrel exports
- top-level imports in CLI and setup code
- lazy imports intended to protect optional backends
3. Keep setup honest
Setup should:
- detect incompatible Node and runtime constraints early
- choose safe defaults for unsupported environments
- explain disabled features precisely
4. Keep doctor useful
Doctor and status output should answer:
- what backend is active
- why a fallback happened
- what the user must install or upgrade
Guardrails
- Never rely on a fallback that can be bypassed by an earlier top-level import.
- Avoid setup flows that recommend unsupported defaults.
- Keep user-facing warnings concrete: feature, reason, required version, action.
- When packaging changes matter, inspect the installed global package as well as local source.
Reference
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.
- 10d ago First seen · 62 lines · 35 tokens per session scan A 60403a5a5cd0
localnest-mcp-runtime is a skill published in the GitHub repository wmt-mobile/localnest (6 stars, last pushed 2mo ago), licensed MIT. It adds 35 tokens to every session and 375 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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