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 agentmods add skills/hoavdc/codexkit/codexkit-business-case-writernpx skills add hoavdc/CodexKit --skill codexkit-business-case-writergit 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-business-case-writer)<a href="https://agentmods.dev/skills/hoavdc/codexkit/codexkit-business-case-writer"><img src="https://agentmods.dev/badge/skills/hoavdc/codexkit/codexkit-business-case-writer.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 | $0.00061 | $0.01334 |
| Opus 5 | $0.00030 | $0.00667 |
| Sonnet 5 | $0.00012 | $0.00267 |
| Haiku 4.5 | $0.00006 | $0.00133 |
Grade A, and why
codexkit-business-case-writer 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.
How it starts
The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Business Case Writer
When to Use
- When proposing a new project or initiative that needs funding
- When leadership requires financial justification for an investment
- When comparing build vs buy vs partner options
- When preparing for a governance or investment board review
Procedure
Step 1 — Executive Summary
Write a 1-paragraph summary that covers:
- The problem / opportunity (1 sentence)
- The recommended solution (1 sentence)
- The expected value (1 sentence with key numbers)
- The ask (1 sentence — what you need approval for)
Step 2 — Problem Statement
Frame the problem with data:
- What is happening today? (current state with metrics)
- What is the impact? (revenue, cost, risk, customer satisfaction)
- Why now? (trigger event, competitive pressure, window of opportunity)
- What happens if we do nothing? (cost of inaction)
Step 3 — Options Analysis
| Criterion | Option A: Build | Option B: Buy | Option C: Do Nothing |
|---|---|---|---|
| Time to value | 6 months | 2 months | — |
| Upfront cost | $200K | $80K | $0 |
| Annual cost | $50K | $120K/yr | $300K (cost of problem) |
| Control | Full | Limited | — |
| Risk | Medium (execution) | Low (vendor) | High (growing problem) |
| Strategic fit | High | Medium | Low |
Step 4 — Financial Analysis
| Metric | Year 1 | Year 2 | Year 3 | Total |
|---|---|---|---|---|
| Revenue impact | $100K | $250K | $400K | $750K |
| Cost savings | $50K | $80K | $80K | $210K |
| Total benefit | $150K | $330K | $480K | $960K |
| Investment | ($200K) | ($50K) | ($50K) | ($300K) |
| Net value | ($50K) | $280K | $430K | $660K |
Summary metrics:
- ROI: 220% over 3 years
- Payback period: 14 months
- NPV (8% discount): $540K
Step 5 — Risk Assessment
| Risk | Probability | Impact | Mitigation |
|---|---|---|---|
| Execution delay | Medium | Medium | Phased rollout, dedicated team |
| Adoption failure | Low | High | Change management plan |
| Technology risk | Low | Medium | POC before full commit |
What ships with it
4 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.
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 First seen · 158 lines · 61 tokens per session scan A da9bc91138d6
codexkit-business-case-writer is a skill published in the GitHub repository hoavdc/CodexKit (21 stars, last pushed 3mo ago), licensed MIT. It adds 61 tokens to every session and 1,334 once invoked, about $0.0003 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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