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skill-porter

skill-porter is a skill for Claude Code from Demerzels-lab/elsamultiskillagent. It costs 51 tokens per session (1,719 once invoked), scanned A, original, MIT.

A converter that changes Claude Code skills into Gemini CLI extensions, and Gemini extensions into Claude Code skills. Claude Code and Gemini CLI are separate developer tools with different file formats and conventions.

In plain words
What is it for?
Use it to port a skill, convert an extension, detect which platform a project targets, or prepare a version that supports both platforms.
Why use it?
It avoids rewriting the same skill by hand when moving it between these two tools.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; mentions Claude Code; mentions Gemini CLI.

not rated 10repo 3mo ago A scan 51 tokens original MIT

Good fit Use it to port a skill, convert an extension, detect which platform a project targets, or prepare a version that supports both platforms.

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Install with agentmods
npx agentmods add skills/demerzels-lab/elsamultiskillagent/skill-porter
View source ↗ Demerzels-lab/elsamultiskillagent elsamultiskillagent.site
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Demerzels-lab/elsamultiskillagent --skill skill-porter
Clone the repo
git clone --depth 1 https://github.com/Demerzels-lab/elsamultiskillagent

Made for: Claude Code.

Wrote 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.

agentmods badge for skill-porter

README.md
[![agentmods](https://agentmods.dev/badge/skills/demerzels-lab/elsamultiskillagent/skill-porter/github.svg)](https://agentmods.dev/skills/demerzels-lab/elsamultiskillagent/skill-porter)
Your own site
<a href="https://agentmods.dev/skills/demerzels-lab/elsamultiskillagent/skill-porter"><img src="https://agentmods.dev/badge/skills/demerzels-lab/elsamultiskillagent/skill-porter/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.

agentmods 80×15 button for skill-porter

Your own site · 80×15
<a href="https://agentmods.dev/skills/demerzels-lab/elsamultiskillagent/skill-porter"><img src="https://agentmods.dev/badge/skills/demerzels-lab/elsamultiskillagent/skill-porter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,719 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00051 $0.01719
Opus 5 $0.00026 $0.00860
Sonnet 5 $0.00010 $0.00344
Haiku 4.5 $0.00005 $0.00172

Measured 11d ago against content hash f9cf6aac4d63, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

skill-porter 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 11d ago.

The scan reads SKILL.md. This mod also ships 8 executable files (src/analyzers/detector.js, src/analyzers/validator.js, src/cli.js, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

public/skills/0xnagato/skill-porter/SKILL.md · 261 lines

How it starts

The opening of the file, as written. The whole thing — 261 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Porter - Cross-Platform Skill Converter

This skill automates the conversion between Claude Code skills and Gemini CLI extensions, enabling true cross-platform AI tool development.

Core Capabilities

Bidirectional Conversion

Convert skills and extensions between platforms while preserving functionality:

Example requests:

  • "Convert this Claude skill to work with Gemini CLI"
  • "Make my Gemini extension compatible with Claude Code"
  • "Create a universal version of this skill that works on both platforms"
  • "Port the database-helper skill to Gemini"

Smart Platform Detection

Automatically analyzes directory structure to determine source platform:

Detection criteria:

  • Claude: Presence of SKILL.md with YAML frontmatter or .claude-plugin/marketplace.json
  • Gemini: Presence of gemini-extension.json or GEMINI.md context file
  • Universal: Has both platform configurations

Example requests:

  • "What platform is this skill built for?"
  • "Analyze this extension and tell me what needs to be converted"
  • "Is this a Claude skill or Gemini extension?"

Metadata Transformation

Intelligently converts between platform-specific formats:

Conversions handled:

  • YAML frontmatter ↔ JSON manifest
  • allowed-tools (whitelist) ↔ excludeTools (blacklist)
  • Environment variables ↔ settings schema
  • MCP server configuration paths
  • Platform-specific documentation formats

Example requests:

  • "Convert the metadata from this Claude skill to Gemini format"
  • "Transform the allowed-tools list to Gemini's exclude pattern"
  • "Generate a settings schema from these environment variables"

MCP Server Preservation

Maintains Model Context Protocol server configurations across platforms:

Example requests:

  • "Ensure the MCP server config works on both platforms"
  • "Update the MCP server paths for Gemini's ${extensionPath} variable"
  • "Validate that the MCP configuration is compatible"

Validation & Quality Checks

Ensures converted output meets platform requirements:

Read the full file on GitHub · 261 lines

Files

What ships with it

32 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 11d ago First seen · 261 lines · 51 tokens per session scan A f9cf6aac4d63

Subscribe to this mod's changes

skill-porter is a skill published in the GitHub repository Demerzels-lab/elsamultiskillagent (10 stars, last pushed 3mo ago), licensed MIT. It adds 51 tokens to every session and 1,719 once invoked, about $0.0003 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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