Skill creator parser truncates folded YAML descriptions after blank lines

Summary

skills/skill-creator/scripts/utils.py:parse_skill_md hand-parses SKILL.md frontmatter and truncates valid folded YAML descriptions when the folded block contains a blank paragraph separator. The same repository also validates skill frontmatter with yaml.safe_load, so a SKILL.md file can pass validation but be read incorrectly by the skill-creator evaluation/improvement flow.

Tested on OpenBMB/PilotDeck main at 0907c5c9ae66cc155f36775fc8472b3ea621880d.

Code path

• skills/skill-creator/scripts/utils.py:7 defines parse_skill_md, returning (name, description, full_content).
• skills/skill-creator/scripts/utils.py:35-41 collects multiline description: > continuation lines only while they are indented, so a blank YAML paragraph line stops parsing early.
• skills/skill-creator/scripts/quick_validate.py:35 validates the same frontmatter with yaml.safe_load.
• skills/skill-creator/scripts/run_loop.py:64, scripts/run_eval.py:279, and scripts/improve_description.py:213 consume parse_skill_md output.

Steps to reproduce

Create a temporary skill directory with this SKILL.md:

---
name: a
description: >
  0

  0
metadata:
  version: "1.0"
---
# Body
Body text.

Then compare parse_skill_md(skill_dir)[1] with yaml.safe_load(frontmatter)["description"].

Observed dynamic repro:

expected_description: "0\n0\n"
original_description: "0"

Expected behavior

parse_skill_md should return the same description value accepted by the repository's YAML validator for valid SKILL.md frontmatter.

Actual behavior

The parser stops at the blank line inside a valid folded block and silently drops the following paragraph.

Existing coverage

I searched current issues and PRs for parse_skill_md, folded YAML, frontmatter, and SKILL.md description, and did not find an existing issue or PR covering this root cause. Open PRs do not modify skills/skill-creator/scripts/utils.py.

Related but not covering:

• PRs about case-insensitive SKILL.md discovery touch the skill manager/discovery path, not this frontmatter parser behavior.

Suggested fix

Use yaml.safe_load for the frontmatter in parse_skill_md, matching quick_validate.py, or otherwise implement YAML folded/literal block semantics consistently.

Suggested tests

• Folded description block with an empty paragraph line.
• Literal block description.
• Quoted inline description.
• Validation and parse_skill_md returning the same name and description.

---

Submitted with Codex.

Start with skills/skill-creator/scripts/utils.py:parse_skill_md and compare its output with yaml.safe_load as used in quick_validate.py. Reproduce the folded and literal block cases from the issue, then add coverage showing parse_skill_md matches validated name and description values, including blank paragraph lines.