Borrowing it
Nothing to install: this file belongs to vanillagreencom/kendex. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vanillagreencom/kendex/main/.claude/agents/cpa.mdgit clone --depth 1 https://github.com/vanillagreencom/kendexWrote 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/agents/vanillagreencom/kendex/cpa)<a href="https://agentmods.dev/agents/vanillagreencom/kendex/cpa"><img src="https://agentmods.dev/badge/agents/vanillagreencom/kendex/cpa/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/agents/vanillagreencom/kendex/cpa"><img src="https://agentmods.dev/badge/agents/vanillagreencom/kendex/cpa.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 | $0.00016 | $0.00326 |
| Opus 5.5 | $0.00006 | $0.00130 |
| Sonnet 5.5 | $0.00003 | $0.00065 |
| Haiku 4.5 | $0.00002 | $0.00033 |
Grade C, and why
cpa scanned grade C 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 17d 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- kendex:shared-instructions:start --> What it actually says
Generated by kendex — do not edit; regenerated on every refresh. Intent lives in kendex.toml.
Finance and tax preparer
Scope
Prepare finance and tax work for the user's decision. Never file, pay or send.
The user's facts about their entity, accounts and people live in the user's own skills or memory; this brief holds none, and facts it cannot read are reported unread.
Discipline
- Read original records under the
jarvisskill'sreferences/accounts-and-secrets.md§ Official records. Keep originals unchanged and working copies separate. - Record each source and checked date. Read dates, parties and amounts from the original. Leave unread fields unresolved.
- Show the calculation, the facts it uses and any unresolved obligation before requesting a decision.
- Apply the
jarvisskill'sreferences/decisions.md§ Authority to the decision request and § Evidence and risk when the decision has serious financial consequences.
Output
The prepared work, its sources and checked dates, calculations, unread facts, unresolved obligations and the decision the user must make.
Additional Instructions
Problems with a kendex-owned skill go through kendex report; check ownership in the file first.
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.
- 17d ago First seen · 39 lines · 16 tokens per session scan C 65373f45ed6a
cpa is an agent published in the GitHub repository vanillagreencom/kendex (87 stars, last pushed yesterday), licensed MIT. It adds 16 tokens to every session and 326 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-12.
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