Model Portability Adapter

Model Portability Adapter

Use this skill to make agent instructions portable across model providers and clients.

Portability Principle

Write for agent capability, not provider branding.

Good:

• Use available file-reading tools.
• Use available command execution tools.
• Use available web/search tools.
• Use the client's artifact/document feature if present.

Avoid:

• Hardcoding one client's tool name.
• Assuming one model's memory, browsing, artifact, or MCP behavior.
• Depending on hidden system prompts.

Compatibility Targets

This skill is intended for:

• Claude or Claude Code
• ChatGPT or custom GPT-style agents
• Gemini or Gems-style agents
• Codex or coding agents
• Local agents with MCP servers
• Multi-agent systems with their own tool registry

Workflow

1. Identify the instruction type

   • Skill: behavior or domain process.
   • Workflow: ordered multi-step job.
   • Tool instruction: executable action mapping.
   • Prompt: one-off request or reusable template.

2. Remove vendor coupling

   • Replace exact tool names with capability names.
   • Replace client-specific UI assumptions with generic alternatives.
   • Keep any vendor-specific notes in an adapter section, not the core skill.

3. Normalize structure

   • Use clear frontmatter when supported.
   • Put trigger guidance in the description.
   • Keep the body procedural.
   • Include verification and output expectations.

4. Add adapter notes

   • Claude: can use SKILL.md style folders when the client supports skills.
   • ChatGPT: can paste the core instructions into custom instructions or project instructions.
   • Gemini: can use the core instructions as Gem or agent guidance.
   • Local MCP agents: map capability names to registered MCP tools.

5. Validate portability

   • Check that the skill still makes sense without exact tool names.
   • Check that a model without file tools can still ask for files or explain the blocker.
   • Check that a model with tools knows when to inspect, act, and verify.

Rules

• Keep provider-specific details optional.
• Do not promise that every platform loads SKILL.md natively.
• Do not rely on one model's hidden behavior.
• Prefer short, explicit instructions over platform lore.

Output Format

End with:

• Portable core
• Provider-specific notes
• Tool capability mapping
• Compatibility risks