Knowledge Work Plugins is an open-source collection of Claude extensions organized around roles such as productivity, sales, and customer support. Each plugin combines role-specific guidance, connectors, commands, and sub-agents so knowledge workers can use Claude with their team’s tools and processes. The catalogue entries are examples of, or workflows from, this plugin collection.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/anthropics/knowledge-work-pluginsnpx agentmods add skills/anthropics/knowledge-work-plugins/vendor-checkWrote 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/anthropics/knowledge-work-plugins/vendor-check)<a href="https://agentmods.dev/skills/anthropics/knowledge-work-plugins/vendor-check"><img src="https://agentmods.dev/badge/skills/anthropics/knowledge-work-plugins/vendor-check/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/skills/anthropics/knowledge-work-plugins/vendor-check"><img src="https://agentmods.dev/badge/skills/anthropics/knowledge-work-plugins/vendor-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector pass
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 | $0.00076 | $0.01269 |
| Opus 5.5 | $0.00030 | $0.00508 |
| Sonnet 5.5 | $0.00015 | $0.00254 |
| Haiku 4.5 | $0.00008 | $0.00127 |
Grade A, and why
vendor-check 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 1mo 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.
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.
Copies of this mod
2 near-identical copies found in the catalogue:
- vendor-check — 100% identical, 0 lines differ
- vendor-check — 95% identical, 8 lines differ
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/vendor-check -- Vendor Agreement Status
If you see unfamiliar placeholders or need to check which tools are connected, see CONNECTORS.md.
Check the status of existing agreements with a vendor across all connected systems. Provides a consolidated view of the legal relationship.
Important: This command assists with legal workflows but does not provide legal advice. Agreement status reports should be verified against original documents by qualified legal professionals.
Invocation
/vendor-check [vendor name]
If no vendor name is provided, prompt the user to specify which vendor to check.
Workflow
Step 1: Identify the Vendor
Accept the vendor name from the user. Handle common variations:
- Full legal name vs. trade name (e.g., "Alphabet Inc." vs. "Google")
- Abbreviations (e.g., "AWS" vs. "Amazon Web Services")
- Parent/subsidiary relationships
Ask the user to clarify if the vendor name is ambiguous.
Step 2: Search Connected Systems
Search for the vendor across all available connected systems, in priority order:
CLM (Contract Lifecycle Management) -- If Connected
Search for all contracts involving the vendor:
- Active agreements
- Expired agreements (last 3 years)
- Agreements in negotiation or pending signature
- Amendments and addenda
CRM -- If Connected
Search for the vendor/account record:
- Account status and relationship type
- Associated opportunities or deals
- Contact information for vendor's legal/contracts team
Email -- If Connected
Search for recent relevant correspondence:
- Contract-related emails (last 6 months)
- NDA or agreement attachments
- Negotiation threads
Documents (e.g., Box, Egnyte, SharePoint) -- If Connected
Search for:
- Executed agreements
- Redlines and drafts
- Due diligence materials
Chat (e.g., Slack, Teams) -- If Connected
Search for recent mentions:
- Contract requests involving this vendor
- Legal questions about the vendor
- Relevant team discussions (last 3 months)
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.
- 1mo ago First seen · 160 lines · 76 tokens per session scan A 38be57a5e9e9
vendor-check is a skill published in the GitHub repository anthropics/knowledge-work-plugins (33,434 stars, last pushed today), licensed Apache-2.0. It adds 76 tokens to every session and 1,269 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-03.
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