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Missing Frontmatter · agent-sh | DecimalAI

Registry skillby agent-sh

Missing Frontmatter

agent-sh/missing-frontmatter

Source agent-sh/agnix ↗License Apache-2.0

No frontmatter here.

SkillScore50Maintained

Automatic

Doc Ops pack

Last verified 8/4/2026

What it changes

Passed 11 of 22 test cases with the skill, and 9 of 22 without it.

Without skill41%

With skill50%

Checks it passed that the model alone missed

The response includes a conditional check for the string `---`.
The response includes a bash command like `head`, `awk`, or `sed` to read the first line of the file.
The response includes logic that specifically isolates the first line of the file to check for frontmatter.

and 1 more in the full report

3 fixed8 passed either way10 still failing1 broke

Pass-rate lift: +9 pp
Tokens: +1%
Agent turns: 0%
Response time: +4%

Model gemini-3.6-flashMeasured 8/4/2026v111 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/agent-sh-missing-frontmatter/SKILL.md https://app.decimal.ai/s/agent-sh-missing-frontmatter/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add agent-sh-missing-frontmatter, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/agent-sh-missing-frontmatter/ and pins it in .decimal/skills.lock

decimalai skills add agent-sh-missing-frontmatter

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/agent-sh-missing-frontmatter/SKILL.md https://app.decimal.ai/s/agent-sh-missing-frontmatter/SKILL.md

Raw file: /s/agent-sh-missing-frontmatter/SKILL.md ↗ · machine-readable summary at /s/agent-sh-missing-frontmatter.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 3

Prompt

Can you trigger a GitHub Actions workflow on my repository to check my PRs for missing frontmatter?

What was checked, without and with the skill
Checked	Without skill	With skill
The response includes a YAML workflow step that runs a script to check for missing frontmatter.	Passed	Passed
The response includes a shell command within the workflow that checks the first line of modified markdown files.	Missed	Passed

case-09 · gemini-3.6-flash · 8/4/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md1 linessingle file

No frontmatter here.

Track record

Benchmark

11 / 22

test cases passed, vs 9 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/1/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

agent-sh / agnix

tests/fixtures/skills/missing-frontmatter/SKILL.md

View on GitHub ↗

License Apache-2.0Imported 8/1/2026Version v1

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