acct-customer-proof-story SKILL.md skillA
acct-customer-proof-story from polar-bear-org/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add polar-bear-org/claude-skills/acct-customer-proof-story@git:20261011.dce569cPins git:20261011.dce569c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- polar-bear-org/claude-skills
- Path
packs/account-executives-pack/skills/acct-customer-proof-story/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261011.dce569c, committed Oct 11, 2026
- Size
- 5,005 bytes
- Repository stars
- 51
- License
- a license file GitHub does not identify
Writes a customer proof story from a guided interview with the seller who ran the account, with a paragraph of 120 to 180 words for one prospect, a short version and the list of what the customer must agree to. Use for "run acct-customer-proof-story", "customer story", "customer proof", "case study paragraph for a proposal", "customer reference for this prospect", "have you done this before", "write up a customer win", part of the Claude for Account Executives Pack by Polar Bear.
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
# Customer Proof Story ## When To Use The prospect asks "have you done this for someone like us?" and nothing is written down. Run this with the seller who ran the account, or on your own win. It answers: which true story about a customer speaks to this prospect, without bending anything? ## When Not To Use If no real customer resembles the prospect, do not force the likeness: rest your FAB Statements on other proof, such as a trial. To understand internally why a deal was won, use Win/Loss Review. ## Inputs - The seller who ran the account (or you), free for half an hour. - The customer-side sources for any figure: a report, an email, a dashboard, with its date. - What the customer said, word for word, about being cited; the prospect's situation in three lines; where the paragraph will go. If you have none of this, I start from a short interview about the work and mark the output as a first draft. ## Approach …
Read the whole file at its exact version.
How to install
mdr add polar-bear-org/claude-skills/acct-customer-proof-story@sha256:91405f8c279183a5The line at the top of this page pins the label git:20261011.dce569c, 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_wrstnt2jwcu4x2it)
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Versions
The registry has recorded 1 version of this file, committed on Oct 11, 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 (5005 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
polar-bear-org/claude-skills · 51 stars · license a license file GitHub does not identify · pushed 2026-10-26 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wrstnt2jwcu4x2it GET https://markdownregistry.com/api/v1/resolve?ref=polar-bear-org/claude-skills/acct-customer-proof-story GET https://markdownregistry.com/api/v1/blob/91405f8c279183a560a34db481b0610d9a17c284bd57b2969cab3b6807e60de8
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.