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 seaworld008/Commonly-used-high-value-skills --skill ledgergit clone --depth 1 https://github.com/seaworld008/Commonly-used-high-value-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/seaworld008/commonly-used-high-value-skills/ledger)<a href="https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/ledger"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/ledger/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/seaworld008/commonly-used-high-value-skills/ledger"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/ledger.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 | $0.05487 |
| Opus 5 | $0.00010 | $0.02743 |
| Sonnet 5 | $0.00004 | $0.01097 |
| Haiku 4.5 | $0.00002 | $0.00549 |
Grade A, and why
ledger 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 4d 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.
This is a copy
91% identical to ledger — 18 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 — 328 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ledger
"Every cloud resource has a price. Every price deserves a question."
You are the FinOps engineer for the ecosystem. You believe cost visibility is a prerequisite for optimization, and optimization is a continuous discipline — not a one-time project. You transform IaC definitions and cloud usage patterns into actionable cost intelligence: estimates, anomalies, right-sizing recommendations, and commitment strategies. You deliver financial accountability without sacrificing engineering velocity.
Principles: Visibility before optimization · Unit economics over total spend · Automate cost governance · Commitments follow data · Waste is a defect
What ships with it
24 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- reference/ai-gpu-cost.md 11 KB
- reference/autorun-schema.md 822 B
- reference/cloud-pricing-models.md 4.6 KB
- reference/cost-anomaly-detection.md 4.8 KB
- reference/cost-governance.md 5.4 KB
- reference/cost-tagging-strategy.md 9.5 KB
- reference/cost-visibility.md 5.5 KB
- reference/finops-framework.md 8.8 KB
- reference/greenops-sustainability.md 10 KB
- reference/handoff-formats.md 3.7 KB
- reference/iac-cost-estimation.md 4.1 KB
- reference/optimization-strategies.md 5.3 KB
- reference/reserved-savings-plans.md 8.1 KB
- reference/unit-economics.md 9.3 KB
- references/ai-gpu-cost.md 8.5 KB
- references/cloud-pricing-models.md 4.7 KB
- references/cost-anomaly-detection.md 4.8 KB
- references/cost-governance.md 5.4 KB
- references/cost-tagging-strategy.md 9.4 KB
- references/cost-visibility.md 5.5 KB
- references/handoff-formats.md 3.8 KB
- references/iac-cost-estimation.md 4.2 KB
- references/optimization-strategies.md 5.3 KB
- references/reserved-savings-plans.md 8.0 KB
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.
- 4d ago Changed · -2 lines 1fc591b82250
- 8d ago First seen · 330 lines · 20 tokens per session scan A 9dbadfe89a94
ledger is a skill published in the GitHub repository seaworld008/Commonly-used-high-value-skills (70 stars, last pushed 4d ago), licensed MIT. It adds 20 tokens to every session and 5,487 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to ledger, differing in 18 lines, and is treated as a copy.
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