Skill Host Compat

CommunityPopular

affaan-m

skill-host-compat

Lint ECC skills for Codex/Cursor-safe frontmatter and Claude-only substitutions before a skill PR.

Overview

Publisher	affaan-m
Repository	`ECC`
Skill name	`skill-host-compat`
Stars	277.3K
Forks	41.4K
Bundled files	1
License	MIT
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
1 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by affaan-m on GitHub. Read the source before you install it.

Installation

Install the Skill Host Compat AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/affaan-m/ECC/tree/main/.agents/skills/skill-host-compat
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/affaan-m/ECC.git /tmp/ECC
mkdir -p .claude/skills
cp -r /tmp/ECC/.agents/skills/skill-host-compat .claude/skills/skill-host-compat

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Skill Host Compat in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Skill Host Compat on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Skill Host Compat is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Skill Host Compatibility

Run the same host-compat gate CI uses on skills/ before opening a skill PR. The check is for Codex and Cursor copies, not Claude-only runtime quality.

When to Activate

Adding or editing a skill under skills/
Copying a skill into .agents/skills/ or .cursor/skills/
A review asks whether a skill is safe to install into Codex or Cursor
CI reports validate-skill-host-compat.js findings

Core Concepts

Canonical skills live in skills/. Codex loads .agents/skills/. Cursor loads a smaller .cursor/skills/ subset. CONTRIBUTING documents that sync as manual.

validate-skills.js only checks that SKILL.md exists and that name / description are usable YAML. tests/ci/codex-skill-surface.test.js only sees .agents/skills/. This script is the cross-tree gate:

Claude-only substitutions in executable bash / sh / zsh fences ($CLAUDE_SESSION_ID, $CLAUDE_SKILL_DIR, $CLAUDE_PLUGIN_ROOT, $CLAUDE_PROJECT_DIR, $ARGUMENTS) fail. Codex leaves those tokens as literal text. In a Codex copy, rewrite $CLAUDE_PROJECT_DIR to $(pwd) or an explicit path.
A Codex copy may only use name, description, metadata, license, and allowed-tools. origin: ECC may stay on the canonical skills/ copy and must be stripped on the Codex copy.
A skill listed in agents/openai.yaml that has a skills/ directory must have .agents/skills/<name>/. Cursor copies are optional; when present, name: must match the directory.
CONTRIBUTING checklist items (When to Activate, Anti-Patterns, name matches directory, 500/800 line caps) warn. They fail only with --strict-checklist.

validate-skills.js frontmatter WARN default is unchanged (#1663).

Code Examples

From the repo root:

bash
node scripts/ci/validate-skill-host-compat.js

Print counts without failing:

bash
node scripts/ci/validate-skill-host-compat.js --inventory

Promote checklist warnings:

bash
node scripts/ci/validate-skill-host-compat.js --strict-checklist

Slash command:


$skill-host-compat
$skill-host-compat --inventory

Anti-Patterns

Codex and Cursor projections must resolve Claude-only substitutions in executable blocks. Canonical Claude-scoped examples remain valid. POSIX $1 and ${1} parameters are ambiguous and require review rather than failing this gate. This fence is the forbidden pattern; do not use these unresolved projection examples:

bash
echo "$CLAUDE_SESSION_ID"
ls "$CLAUDE_SKILL_DIR"
node "$CLAUDE_PLUGIN_ROOT/scripts/setup.js" $ARGUMENTS
cd "$CLAUDE_PROJECT_DIR"

Do not add version: or origin: to a Codex copy under .agents/skills/. Do not treat a passing validate-skills.js run as Codex-safe. Do not require every skills/ entry to have a Cursor copy.

Best Practices

Keep canonical origin: ECC if the CONTRIBUTING template calls for it.
Drop origin, version, and argument-hint on the Codex copy.
Show host-portable commands in bash fences (npx, ecc, or a resolved root). Rewrite $CLAUDE_PROJECT_DIR in Codex copies to $(pwd) or an explicit path. Keep valid Claude-scoped forms in canonical instructions; resolve host variables in the target projection.
Run this script before npm test when the change is a new skill.
Use --inventory to see checklist warning volume without failing the tree.

Related Skills

skill-comply — runtime behavioral traces, not host-portability
skill-stocktake — holistic audit of installed ~/.claude/skills
skill-scout — search existing skills before creating a new one

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

agents/openai.yaml1 KB

Frequently asked questions

What does the Skill Host Compat AI skill do?

Lint ECC skills for Codex/Cursor-safe frontmatter and Claude-only substitutions before a skill PR.

Why use Skill Host Compat on TypingMind?

Because you install it once and use it with any model. Skill Host Compat is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Skill Host Compat in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/affaan-m/ECC/tree/main/.agents/skills/skill-host-compat. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Skill Host Compat?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Skill Host Compat?

As many as you like. As long as a model supports skills, you can use Skill Host Compat with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Skill Host Compat AI skill free?

Yes. It is published on GitHub by affaan-m under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Skill Host Compatibility

When to Activate

Core Concepts

Code Examples

Anti-Patterns

Best Practices

Related Skills

Bundled files

Frequently asked questions

Related AI Skills

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