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/cxcscmu/SkillLearnBenchnpx agentmods add skills/cxcscmu/skilllearnbench/13f-comparisonWrote 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/cxcscmu/skilllearnbench/13f-comparison)<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/13f-comparison"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/13f-comparison.svg" alt="Measured on agentmods" 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 | $0.00019 | $0.00173 |
| Opus 5 | $0.00010 | $0.00086 |
| Sonnet 5 | $0.00004 | $0.00035 |
| Haiku 4.5 | $0.00002 | $0.00017 |
Grade A, and why
13f-comparison scanned grade A with 0 findings 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 3d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Overview
Analyze changes in investment strategy across quarters or identify major institutional holders of a stock.
Usage
Compare Holdings Between Quarters
python3 /root/.agents/skills/13f-analyzer/scripts/one_fund_analysis.py \
--quarter 2025-q3 --accession_number <Q3_ACCESSION> \
--baseline_quarter 2025-q2 --baseline_accession_number <Q2_ACCESSION>
Find Top Holders of a Stock
python3 /root/.agents/skills/13f-analyzer/scripts/holding_analysis.py --cusip <CUSIP> --quarter 2025-q3 --topk 3
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.
- 3d ago First seen · 23 lines · 19 tokens per session scan A cf01037157b8
13f-comparison is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 1mo ago), licensed MIT. It adds 19 tokens to every session and 173 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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