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/skill-creator

@5e32f72
by openaiopenai/codex127k stars
19,934

Create or update a Codex skill with appropriately scoped instructions and any needed supporting resources.

Use this Skill: https://skilld.dev/gh/openai/codex/skill-creator

This session only. Nothing lands on disk.

referencesopenai_yaml.md

≈589 tokens on demand. Your agent reads this file only when SKILL.md points to it.

openai.yaml fields (full example + descriptions)

agents/openai.yaml is an extended, product-specific config intended for the machine/harness to read, not the agent. Other product-specific config can also live in the agents/ folder.

Full example

interface:
  display_name: "Optional user-facing name"
  short_description: "Optional user-facing description"
  icon_small: "./assets/small-400px.png"
  icon_large: "./assets/large-logo.svg"
  brand_color: "#3B82F6"
  default_prompt: "Optional surrounding prompt to use the skill with"

dependencies:
  tools:
    - type: "mcp"
      value: "github"
      description: "GitHub MCP server"
      transport: "streamable_http"
      url: "https://api.githubcopilot.com/mcp/"

policy:
  allow_implicit_invocation: true

Field descriptions and constraints

Top-level constraints:

  • Quote all string values.

  • Keep keys unquoted.

  • For interface.default_prompt: generate a helpful, short (typically 1 sentence) example starting prompt based on the skill. It must explicitly mention the skill as $skill-name (e.g., "Use $skill-name-here to draft a concise weekly status update.").

  • interface.display_name: Human-facing title shown in UI skill lists and chips.

  • interface.short_description: Human-facing short UI blurb (25–64 chars) for quick scanning.

  • interface.icon_small: Path to a small icon asset (relative to skill dir). Default to ./assets/ and place icons in the skill's assets/ folder.

  • interface.icon_large: Path to a larger logo asset (relative to skill dir). Default to ./assets/ and place icons in the skill's assets/ folder.

  • interface.brand_color: Hex color used for UI accents (e.g., badges).

  • interface.default_prompt: Default prompt snippet inserted when invoking the skill.

  • dependencies.tools[].type: Dependency category. Only mcp is supported for now.

  • dependencies.tools[].value: Identifier of the tool or dependency.

  • dependencies.tools[].description: Human-readable explanation of the dependency.

  • dependencies.tools[].transport: Connection type when type is mcp.

  • dependencies.tools[].url: MCP server URL when type is mcp.

  • policy.allow_implicit_invocation: When false, the skill is not injected into the model context by default, but can still be invoked explicitly via $skill. Defaults to true.

Source: SKILL.md on GitHub

1 warning1d4 checks · Risk SAFE
  • Gen Agent Trust Hub1d

    This skill acts as a comprehensive guide for creating and maintaining AI agent skills. It includes standardized templates and utility scripts that are used within the scope of skill development. No security findings were detected.

  • Socket1d

    No alerts

  • Snyk1d

    Risk: LOW · No issues

  • Runlayer7mo

    7/7 files flagged

Signed by skilld at 5e32f72. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub 8 hours ago.

Activeupdated 2 months ago
metadata
{
  "short-description": "Create or update a skill"
}

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