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cccskills
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skill-creator

Create skills that follow GBrain’s required structure, including workflow steps, expected output, and failure handling. Check for overlapping triggers, update the skill registry and routing guide, and verify the result with conformance tests.

OriginalShow the original description

Create new skills following the GBrain conformance standard. Generates SKILL.md with frontmatter, Contract, Phases, Output Format, and Anti-Patterns. Checks MECE against existing skills. Updates manifest and resolver.

See how to install

Good for

  • Create a skill for an uncovered user request
  • Check for overlap with existing skill triggers
  • Update skill registration and routing
  • Verify required sections with conformance tests

Files included (1)

  • SKILL.md3.0 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Skill Creator

Contract

This skill guarantees:

  • New skill follows conformance standard (frontmatter + required sections)
  • MECE check: no overlap with existing skills' triggers
  • Manifest.json updated
  • RESOLVER.md updated with routing entry
  • Skill passes conformance tests (bun test test/skills-conformance.test.ts)

Phases

  1. Identify the gap. What capability is missing? What user intent has no skill?
  2. MECE check. Review skills/manifest.json and skills/RESOLVER.md. Does any existing skill already cover this? If so, extend it instead of creating a new one.
  3. Create SKILL.md. Use this template:
---
name: {skill-name}
version: 1.0.0
description: |
  {One paragraph describing what the skill does and when to use it.}
triggers:
  - "{trigger phrase 1}"
  - "{trigger phrase 2}"
tools:
  - {tool1}
  - {tool2}
mutating: {true|false}
---

# {Skill Title}

## Contract
{What this skill guarantees — 3-5 bullet points}

## Phases
{Numbered workflow steps}

## Output Format
{What good output looks like}

## When it fails
Follow the [agent operator protocol](../conventions/agent-operator-protocol.md) for any gbrain error `code`, exit code, `[AGENT]` block or notice block. Specific to this skill:
{2-5 concrete failures this skill hits — error codes, refusals, notices — and what to do and tell the user}

## Anti-Patterns
{What NOT to do — 3-5 items}

## Tools Used
{GBrain operations used, with descriptions}
  1. Add to manifest. Update skills/manifest.json with name, path, description.
  2. Add to resolver. Update skills/RESOLVER.md with routing entry in the appropriate category.
  3. Verify. Run bun test test/skills-conformance.test.ts to confirm the new skill passes.

Output Format

New skills/{name}/SKILL.md file + updated manifest + updated resolver.

When it fails

Follow the agent operator protocol for any gbrain error code, exit code, [AGENT] block or notice block. Specific to this skill:

  • bun test test/skills-conformance.test.ts fails: the new SKILL.md lacks a required section (Contract, Anti-Patterns, Output Format, When it fails) or frontmatter; add it and re-run.
  • gbrain check-resolvable reports the skill unreachable: add the RESOLVER row in a fitting category, then re-run.

Anti-Patterns

  • Creating a skill that overlaps with an existing one (violates MECE)
  • Skipping the MECE check against existing skills
  • Creating a skill without triggers in frontmatter
  • Not updating manifest.json and RESOLVER.md
  • Creating a skill without an Anti-Patterns section

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