invoice-check SKILL.md skillA
invoice-check from hassan-mohiddin/freeflow is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hassan-mohiddin/freeflow/invoice-check@git:20261012.6923437Pins git:20261012.6923437 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hassan-mohiddin/freeflow
- Path
.skill-eval/skill-family/fixtures/w2-b/skills/invoice-check/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261012.6923437, committed Oct 12, 2026
- Size
- 350 bytes
- Repository stars
- 4
- License
- MIT
Check an invoice draft's totals, tax and currency before it is sent.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Invoice Check Start from the draft's line totals and tax lines. If the invoice converts currency, read `references/rounding.md` before you compare totals. Write the result to `check.md`: each total, the tax applied, and any mismatch.
Read the whole file at its exact version.
How to install
mdr add hassan-mohiddin/freeflow/invoice-check@sha256:b8faea02e95843a4The line at the top of this page pins the label git:20261012.6923437, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_k7akut7q3faxj6kx)
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Versions
The registry has recorded 1 version of this file, committed on Oct 12, 2026.
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 (350 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
hassan-mohiddin/freeflow · 4 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_k7akut7q3faxj6kx GET https://markdownregistry.com/api/v1/resolve?ref=hassan-mohiddin/freeflow/invoice-check GET https://markdownregistry.com/api/v1/blob/b8faea02e95843a4aefd1f9e64d41c73245b9b6d93c0c18ee886a3f09e53e857
Your AI assistant 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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.