Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/aaronjmars/aeon-agentnpx agentmods add skills/aaronjmars/aeon-agent/create-skillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/aaronjmars/aeon-agent/create-skill)<a href="https://agentmods.dev/skills/aaronjmars/aeon-agent/create-skill"><img src="https://agentmods.dev/badge/skills/aaronjmars/aeon-agent/create-skill/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/aaronjmars/aeon-agent/create-skill"><img src="https://agentmods.dev/badge/skills/aaronjmars/aeon-agent/create-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00020 | $0.04051 |
| Opus 5.5 | $0.00008 | $0.01620 |
| Sonnet 5.5 | $0.00004 | $0.00810 |
| Haiku 4.5 | $0.00002 | $0.00405 |
Grade A, and why
create-skill scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
2. **{Step title}.** {More instructions. Code blocks for curl/bash when relevant.} This is a copy
100% identical to create-skill — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.
${var} — A natural-language description of the skill to create. Required. Example:
"monitor Hacker News for AI papers and send a summary"or"track gas prices on Ethereum and alert when below 10 gwei".
If ${var} is empty, exit CREATE_SKILL_NO_VAR:
./notify "create-skill aborted: var empty — pass a description e.g. \"monitor X for Y\""
Then stop.
Today is ${today}. Your task is to generate a complete, production-ready skill from ${var}, score it against a quality bar, and ship it as a PR — never commit directly to main.
Steps
-
Parse the request. Extract from
${var}:- Core action verb (monitor, fetch, generate, analyze, alert, track, scan, etc.)
- Data source(s) — APIs, websites, RSS, on-chain, GitHub, etc.
- Output format — notification, article, file, PR, dashboard, etc.
- Configurable parameter(s) the new skill will accept via its own
${var} - Suggested cadence (daily, hourly, weekly, on-demand)
Save a one-paragraph structured request summary; you'll use it in the PR body.
-
Duplicate detection (deep — not just
ls). Find functional overlap, not just name collision.keywords=$(echo "${var}" | tr '[:upper:]' '[:lower:]' | grep -oE '[a-z]{4,}' \ | grep -vE '^(send|with|from|that|this|when|each|into|over|some|like|just|than|then|also|will|have|been|using|monitor|track|fetch|alert)$' \ | sort -u) for kw in $keywords; do grep -liE "$kw" skills/*/SKILL.md | head -5 doneRead the top 3 candidates fully. For each, judge: does it already do this? Could the request be solved by running an existing skill with a different
var=?- Near-duplicate exists → exit
CREATE_SKILL_DUPLICATE. Notify with the existing skill name and a one-line suggestion ("use existing{skill}withvar={...}instead"). Stop. - Functionally adjacent → design the new skill to complement (different angle/cadence/output). Document the boundary in the PR body.
- Near-duplicate exists → exit
-
Research the data sources. For every API or data source the new skill needs:
- WebSearch for the current API documentation. Cross-check against a secondary source when feasible (a recent GitHub repo using it, an official changelog, or a Stack Overflow answer dated ≥2026) to confirm the endpoint isn't deprecated.
- WebFetch the canonical docs URL — record it as a comment in the SKILL.md and in the PR body's "Sources researched" section.
- Identify exact endpoints, required headers, auth scheme, response schema, and rate limits.
- Note every required environment variable / API key.
- Determine fallback strategy when an optional API key isn't set (WebSearch / WebFetch / cached data / public endpoint).
Research bar (soft): at least one confirmed source URL or exemplar (a working docs page or a public repo using the API). If none, do not hard-abort — log
CREATE_SKILL_INSUFFICIENT_RESEARCH, ask the operator via./notifywith what was tried and why each source failed, and stop. The operator can re-dispatch with a clearer prompt or a source hint. -
New-secret guard. Secrets values are never inspectable from the workflow — only names are listed. Use
gh api repos/:owner/:repo/actions/secrets --jq '.secrets[].name'to read the names of secrets already configured (this endpoint returns names only, never values). Cross-reference with env-var usage inaeon.ymland existing workflows. For each env var the new skill needs:- Name present → continue.
- Name missing → record as
NEW_SECRET_REQUIRED. The generated skill must gracefully degrade or skip when the secret is absent (no hard crash). Add a### Required secretssection to the PR body listing what the operator must add to GitHub Actions secrets before enabling.
If the secret has no graceful fallback, the generated skill's step 1 must do:
if [ -z "$VAR" ]; then ./notify "{skill} skipped: VAR not set"; exit 0; fi
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago Changed a428cc9c850a
- 13d ago Changed · +8 lines 817deb2f4a31
- 1mo ago First seen · 260 lines · 20 tokens per session scan A 312b970cc904
create-skill is a skill published in the GitHub repository aaronjmars/aeon-agent (12 stars, last pushed 4d ago), licensed MIT. It adds 20 tokens to every session and 4,051 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 100% identical to create-skill, differing in 0 lines, and is treated as a copy.
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