[Bug]: codex warns about sisyphus-orchestrator/SKILL.md: missing YAML frontmatter delimited by ---

[grold]

What happened?

⚠ Skipped loading 1 skill(s) due to invalid SKILL.md files.
⚠ /home/grold/.ductor/workspace/skills/sisyphus-orchestrator/SKILL.md: missing YAML frontmatter delimited by ---

Steps to Reproduce

run codex

Expected Behavior

no warnings

Operating System

Linux

Environment

Local (pip install)

Which LLM provider?

Codex

ductor version

0.16.3

/diagnose output

Relevant log output

LLM self-diagnosis (optional)

No response

Additional context

No response

Before submitting

• I have searched existing issues for duplicates.
• I am running the latest version.