SkillNet is infrastructure for finding, creating, evaluating, combining, and coordinating reusable capabilities for AI agents. Agent developers use it as a searchable and installable library of skills and as a system for selecting skills for particular tasks. The catalogue contains skills that can be discovered, installed, or used with SkillNet.
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 skills add zjunlp/SkillNet --skill webshop-purchase-initiatorgit clone --depth 1 https://github.com/zjunlp/SkillNetWrote 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/zjunlp/skillnet/webshop-purchase-initiator)<a href="https://agentmods.dev/skills/zjunlp/skillnet/webshop-purchase-initiator"><img src="https://agentmods.dev/badge/skills/zjunlp/skillnet/webshop-purchase-initiator/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/zjunlp/skillnet/webshop-purchase-initiator"><img src="https://agentmods.dev/badge/skills/zjunlp/skillnet/webshop-purchase-initiator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00080 | $0.00583 |
| Opus 5 | $0.00040 | $0.00292 |
| Sonnet 5 | $0.00016 | $0.00117 |
| Haiku 4.5 | $0.00008 | $0.00058 |
Grade A, and why
webshop-purchase-initiator 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Instructions
When to Use
Activate this skill when:
- A product has been selected from search results.
- All required product options (e.g., size, color, quantity) have been chosen.
- The final displayed price has been verified to be within the user's specified budget.
- The user's instruction implicitly or explicitly indicates readiness to purchase (e.g., "I need to buy...", "I want this one").
Core Action
Execute the click[buy now] action to proceed to checkout.
Verification Logic (Before Clicking)
Before clicking "Buy Now", you must perform these checks:
- Budget Check: Confirm the final displayed
Price:is less than the maximum budget specified in the user's original instruction. If no budget is specified, skip this check. - Option Selection Check: Ensure the required product options (like 'size', 'color') show a selected state or that your previous action has selected the correct option. The observation should reflect the chosen option.
- Product Match Check: Verify the product title and description align with the user's core requirements (e.g., "teeth whitening that also freshens breath").
If any check fails, do not use this skill. Instead, revert to selecting the correct option or searching for a different product.
Example
Instruction: "i need a teeth whitening toothpaste that also freshens breath, and price lower than 15.00 dollars"
Observation: Product page for "Whitening Toothpaste with Breath Freshener" — Price: $12.99, Size: 4oz (selected), Flavor: Mint (selected). Available actions: click[buy now], click[back to search].
Thought: The user needs a teeth whitening toothpaste that freshens breath, under $15. The current product is priced at $12.99 (< $15.00), matches "whitening" and "breath freshener" in the title, and all required options (size, flavor) are selected. All checks pass — proceeding to purchase.
Action: click[buy now]
Error Handling
- If the "Buy Now" button is not present in the list of clickable actions, the action will be invalid. Do not force the action.
- If the price changes after selecting options and exceeds the budget, abort the purchase and inform the user.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 42 lines · 80 tokens per session scan A 49f8862bf083
webshop-purchase-initiator is a skill published in the GitHub repository zjunlp/SkillNet (1,256 stars, last pushed yesterday), licensed MIT. It adds 80 tokens to every session and 583 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 2026-09-03.
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