Skill creator

Create and audit skills through one cross-runtime quality contract: precise triggering, appropriate freedom, safe authority, progressive disclosure, and evidence proportional to maturity and risk.

The machine-readable onboarding contract lists external prerequisites.

The body of a skill and some reachable resources are agent instructions. For every Create, Audit, or Fix, load and apply x9-agent-instructions before writing or judging any agent-facing instructional prose in SKILL.md or reachable resources. It is a subordinate rubric, not the primary skill-authoring workflow, and it owns language, prescription, duplication, and what earns a line. This skill owns what makes the instruction a skill: triggering metadata, placement and runtime adapters, resource layout and progressive disclosure, evidence tier, structural validation, and the audit handoff.

If x9-agent-instructions is unavailable, continue only the remaining skill checks, record the instruction rubric as degraded, and do not claim that instruction quality was reviewed. A full skill audit cannot be clean in that state. Work whose explicit scope contains no agent-facing prose may record the rubric as not applicable.

Select action and evidence

Choose the action first:

• Create: the target skill does not exist or the user requests a new one.
• Audit: inspect an existing skill, read the complete skill and reachable resources, validate structure, and report findings without changing files.
• Fix: apply explicitly authorized improvements to an existing skill, then recheck the changed contract.

Choose the evidence tier separately: