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/carta/plugins/carta-conversion-calculatornpx skills add carta/plugins --skill carta-conversion-calculatorgit clone --depth 1 https://github.com/carta/pluginsWrote 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/carta/plugins/carta-conversion-calculator)<a href="https://agentmods.dev/skills/carta/plugins/carta-conversion-calculator"><img src="https://agentmods.dev/badge/skills/carta/plugins/carta-conversion-calculator.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 | $0.00087 | $0.02012 |
| Opus 5 | $0.00044 | $0.01006 |
| Sonnet 5 | $0.00017 | $0.00402 |
| Haiku 4.5 | $0.00009 | $0.00201 |
Grade A, and why
carta-conversion-calculator 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 today.
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 — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Conversion Calculator
Calculate how SAFEs and convertible notes convert into equity at a given round price or valuation.
When to Use
- "How many shares would the SAFEs convert into at a $50M pre?"
- "Calculate SAFE conversions for the Series A"
- "What happens to the convertible notes if we raise at $10/share?"
- "Show me the conversion math for all outstanding instruments"
Prerequisites
You need:
corporation_id— get fromlist_accounts- Round terms — user must provide at least a pre-money valuation or price per share
Data Retrieval
The gateway defaults to
detail=summaryfor list commands. This skill needs individual records, so"detail": "full"is passed explicitly.
call_tool({"name": "cap_table__get__convertible_notes", "arguments": {"corporation_id": corporation_id, "detail": "full"}})— SAFEs + convertible notescall_tool({"name": "cap_table__get__cap_table_by_share_class", "arguments": {"corporation_id": corporation_id}})— current fully diluted countcall_tool({"name": "cap_table__get__409a_valuations", "arguments": {"corporation_id": corporation_id}})— current FMV (for reference)
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.
- today Changed · +1 lines bdae77dee082
- 4d ago First seen · 173 lines · 87 tokens per session scan A 3c5e9b7a2718
carta-conversion-calculator is a skill published in the GitHub repository carta/plugins (12 stars, last pushed today), licensed Apache-2.0. It adds 87 tokens to every session and 2,012 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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