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 hoavdc/CodexKit --skill codexkit-finance-variance-storygit clone --depth 1 https://github.com/hoavdc/CodexKitWrote 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/hoavdc/codexkit/codexkit-finance-variance-story)<a href="https://agentmods.dev/skills/hoavdc/codexkit/codexkit-finance-variance-story"><img src="https://agentmods.dev/badge/skills/hoavdc/codexkit/codexkit-finance-variance-story.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 | $0.00081 | $0.00672 |
| Opus 5 | $0.00041 | $0.00336 |
| Sonnet 5 | $0.00016 | $0.00134 |
| Haiku 4.5 | $0.00008 | $0.00067 |
Grade A, and why
codexkit-finance-variance-story 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Finance Variance Story
Purpose
Convert raw financial movements into an explanation that managers can act on.
When to use
- Actual results differ materially from budget or forecast.
- A monthly business review needs finance commentary.
- Leadership wants the story behind revenue, margin, cash, or cost movement.
When not to use
- The request is for journal entries or bookkeeping.
- Formal statutory accounting treatment is the main question.
Inputs
- actuals, budget, forecast, or prior-period data
- key business drivers and assumptions
- notable one-offs, mix effects, or timing issues
- audience: board, exec, functional leader, or finance team
Procedure
- Separate size, timing, volume, price, mix, and controllability effects where possible.
- Identify the 3-5 drivers that actually explain most of the movement.
- Connect the variance to cash, margin, runway, or operational implications.
- Distinguish structural change from one-off noise.
- Recommend actions, owners, and forecast implications.
- Flag missing data and confidence limits.
Output
- executive summary of the variance story
- driver table with impact and explanation
- cash and margin implications
- forward-looking actions and watchpoints
- short management commentary in plain language
Definition of done
- A non-finance leader can understand the business story.
- The explanation distinguishes causes from symptoms.
- Recommended actions follow from the analysis.
Examples
- "Explain why gross margin missed plan this quarter and what actions we should take."
- "Turn these budget versus actual numbers into management commentary for the board pack."
Quality Criteria
- All claims reference specific frameworks, standards, or quantifiable data
- Content matches the stated audience's expertise level
- Recommendations are actionable — each includes a concrete next step
- No unsupported assertions or generic filler language
Verification (4C)
| Check | Question |
|---|---|
| Correctness | Do referenced frameworks and standards match their official definitions? |
| Completeness | Are all key concepts covered without significant gaps for the stated audience? |
| Context-fit | Would this be useful for someone new to this domain, or is it too advanced/too basic? |
| Consequence | If a stakeholder acted on this immediately, what could they misinterpret? |
What ships with it
1 file 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.
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.
- 7d ago First seen · 85 lines · 81 tokens per session scan A 1737ca528d0b
codexkit-finance-variance-story is a skill published in the GitHub repository hoavdc/CodexKit (21 stars, last pushed 3mo ago), licensed MIT. It adds 81 tokens to every session and 672 once invoked, about $0.0004 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 2026-08-30.
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