paypal-integration
Integrate PayPal payment processing with support for express checkout, subscriptions, and refund management. Use when implementing PayPal payments, processing online transactions, or building e-commerce checkout flows.
86
71%
Does it follow best practices?
Impact
96%
1.03xAverage score across 6 eval scenarios
Risky
Do not use without reviewing
Optimize this skill with Tessl
npx tessl skill review --optimize ./plugins/payment-processing/skills/paypal-integration/SKILL.mdQuality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a well-crafted skill description that hits all the key criteria. It specifies concrete capabilities (express checkout, subscriptions, refund management), includes natural trigger terms users would say, explicitly states both what it does and when to use it, and is clearly scoped to PayPal to avoid conflicts with other payment-related skills.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'express checkout', 'subscriptions', and 'refund management'. These are distinct, well-defined capabilities within PayPal payment processing. | 3 / 3 |
Completeness | Clearly answers both 'what' (integrate PayPal payment processing with express checkout, subscriptions, refund management) and 'when' (explicit 'Use when implementing PayPal payments, processing online transactions, or building e-commerce checkout flows'). | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'PayPal', 'payment processing', 'express checkout', 'subscriptions', 'refund', 'online transactions', 'e-commerce', 'checkout flows'. Good coverage of terms a developer would naturally use. | 3 / 3 |
Distinctiveness Conflict Risk | Clearly scoped to PayPal specifically, which distinguishes it from other payment provider skills (e.g., Stripe). The combination of 'PayPal', 'express checkout', and 'subscriptions' creates a distinct niche unlikely to conflict with other skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
42%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
The skill provides comprehensive, executable PayPal integration code covering all major features, which is its primary strength. However, it is far too verbose for a SKILL.md - it reads more like a tutorial or documentation dump than a concise skill reference. The lack of progressive disclosure (everything inline, no external file references) and missing workflow validation checkpoints significantly reduce its effectiveness as a skill file.
Suggestions
Reduce the SKILL.md to a concise overview with Quick Start code, then move the PayPalClient class, IPN handling, subscription management, and refund workflows into separate referenced files (e.g., CHECKOUT.md, IPN.md, SUBSCRIPTIONS.md, REFUNDS.md).
Remove the 'Core Concepts' section entirely - Claude already knows what PayPal Checkout, subscriptions, and IPN are. Replace with a brief decision table for which integration method to use.
Add explicit end-to-end workflow with validation checkpoints: create order → verify status → redirect user → handle callback → verify IPN → capture → confirm capture status → fulfill order, with error recovery at each step.
Remove the 'When to Use This Skill' bullet list - this information belongs in the YAML frontmatter description, not the body content.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is extremely verbose at ~350+ lines. The 'Core Concepts' section explains things Claude already knows (what subscriptions are, what IPN is). The 'When to Use This Skill' list is padded. Much of the code could be condensed significantly - e.g., the full PayPalClient class with docstrings and the lengthy subscription/IPN sections repeat patterns unnecessarily. | 1 / 3 |
Actionability | The code examples are concrete, executable, and cover the full range of PayPal integration tasks - from frontend Smart Buttons to backend order creation, IPN handling, subscriptions, and refunds. All examples use real API endpoints and proper request structures. | 3 / 3 |
Workflow Clarity | While individual code blocks are clear, the overall payment flow lacks explicit sequencing with validation checkpoints. There's no clear 'verify order status before capturing' step, no explicit error recovery loops for failed captures, and the IPN verification doesn't describe what to do on failure beyond returning 400. The testing section acknowledges a manual approval step but doesn't provide a clear end-to-end workflow. | 2 / 3 |
Progressive Disclosure | This is a monolithic wall of code with no references to external files. The PayPalClient class, IPN handling, subscription management, and refund workflows could each be separate reference files. Everything is inlined in one massive document with no navigation aids or cross-references. | 1 / 3 |
Total | 7 / 12 Passed |
Validation
100%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
- Repository
- wshobson/agents
- Commit
27a7ed9
- Reviewed
Table of Contents
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