stubfin skillA
stubfin is agent-read markdown (skill) from curie-eng/curie: Answer questions about invoices, customers, amounts and payment status in the company's finance system. Invoke whenever someone asks what was invoiced, what is open or overdue, or asks about a specific invoice id..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Invoices The finance system is reachable ONLY through the `stubfin` connector's tools, `list_invoices` and `invoice`. Call them for every figure you report. Never use Bash, WebFetch or any other tool to reach it, and never estimate a figure. ## How to answer 1. Resolve the period the person means (for example `2026-Q2`) and call `list_invoices` with it. For a single invoice id call `invoice`. 2. Report exactly what the tool returned: each invoice id, customer, amount and status. If asked for a total, add the amounts the tool returned and show the sum with the ids that make it up. 3. If a tool returns an error, quote the error text and stop. Do not retry more than once and do not guess.
Read the whole file at its exact version.
How to install
mdr add curie-eng/curie/stubfin@git:20260921.7574c23mdr add curie-eng/curie/stubfin@sha256:0d958d94618314d1Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_rg3cj47uszoygmgt)
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Versions
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (962 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
curie-eng/curie · 35 stars · license Apache-2.0 · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rg3cj47uszoygmgt GET https://markdownregistry.com/api/v1/resolve?ref=curie-eng/curie/stubfin GET https://markdownregistry.com/api/v1/blob/0d958d94618314d1fbcede9fb694348570b6ecab127fae042fb282035c8ac6c2
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.