Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add cynco-labs/ai-accounting-skills --skill validate-beancountgit clone --depth 1 https://github.com/cynco-labs/ai-accounting-skillsWrote 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/cynco-labs/ai-accounting-skills/validate-beancount)<a href="https://agentmods.dev/skills/cynco-labs/ai-accounting-skills/validate-beancount"><img src="https://agentmods.dev/badge/skills/cynco-labs/ai-accounting-skills/validate-beancount/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/cynco-labs/ai-accounting-skills/validate-beancount"><img src="https://agentmods.dev/badge/skills/cynco-labs/ai-accounting-skills/validate-beancount.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 | $0.00023 | $0.00215 |
| Opus 5 | $0.00012 | $0.00108 |
| Sonnet 5 | $0.00005 | $0.00043 |
| Haiku 4.5 | $0.00002 | $0.00021 |
Grade A, and why
validate-beancount 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 12d 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
python3 -c "import subprocess; subprocess.check_call(['bean-check','path/to/main.beancount'])" What it actually says
/validate-beancount
Purpose
Prove the ledger file is valid before Fava or handoff.
Command
bean-check path/to/main.beancount
# or
python3 -c "import subprocess; subprocess.check_call(['bean-check','path/to/main.beancount'])"
If bean-check missing:
pip install beancount
Also check
- File non-empty; has
option "operating_currency" - Has at least one
openand one*transaction - Engagement currency matches option
- Report path + PASS/FAIL clearly
On FAIL
Do not open Fava as “ready.” Fix export or journals and re-export.
Completion
Done when: bean-check PASS/FAIL reported clearly; on FAIL do not treat ledger as ready.
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.
- 12d ago First seen · 43 lines · 23 tokens per session scan A 43b2b64619cd
validate-beancount is a skill published in the GitHub repository cynco-labs/ai-accounting-skills (3 stars, last pushed 2mo ago), licensed MIT. It adds 23 tokens to every session and 215 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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