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ucp

Use when the user wants to use the UCP CLI to find, compare, buy, or track products from online merchants, or to set up and troubleshoot the local UCP profile required for merchant-scoped operations. Covers global catalog search ("find me X under $Y"), named-merchant transactions ("buy this from Z.com"), order tracking, `ucp profile init`, `ucp doctor`, carts, checkout, orders, and UCP setup/help. Falls back to merchant-hosted handoff when direct in-protocol checkout isn't available.

72

Quality

91%

Does it follow best practices?

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SecuritybySnyk

Medium

Suggest reviewing before use

SKILL.md
Quality
Evals
Security

Quality

Content

81%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a strong operational manual: nearly every section delivers UCP-specific knowledge Claude cannot infer, workflows carry explicit validation and error-recovery ordering, and commands are concrete. The main weaknesses are a handful of trimmable rhetorical asides, two missing concrete examples for common steps (checkout update payload, get_product), and detailed display contracts that could be offloaded to reference files to shrink the SKILL.md footprint.

Suggestions

Add a minimal executable `ucp checkout update --input` example (destination + selected_option_id) so the checkout loop's steps 2-3 have a concrete anchor alongside the existing introspection guidance.

Move the message display-contract table and totals printer contract into a single reference file (e.g. references/display-contracts.md) and keep a short MUST/SHOULD summary inline, reducing SKILL.md body size while preserving one-level-deep disclosure.

Trim rhetorical asides (e.g. "The buyer named that specific merchant for a reason.", "Treat escalation as a normal lifecycle step, not a CLI failure.") to their operative instructions to tighten conciseness without losing the rules.

DimensionReasoningScore

Conciseness

The body is dense, novel protocol knowledge (minor currency units, `--business` scoping, printer contract, escalation ladder, message display obligations) with almost no teaching of concepts Claude already knows. A few rhetorical flourishes ("The buyer named that specific merchant for a reason.", "Treat escalation as a normal lifecycle step, not a CLI failure.") could be trimmed, which fits the efficient-with-minor-trims anchor rather than the lean score-5 anchor.

4 / 5

Actionability

Copy-paste-ready commands cover search (`ucp catalog search --input ... --view ...`), cart create, checkout create/complete, profile init, and doctor, and the printer-contract pseudocode is explicitly justified ("your actual rendering depends on your medium"). Minor gaps remain: no concrete `checkout update` payload example and no `get_product` invocation example, so it sits at mostly-executable rather than fully covering the common cases.

4 / 5

Workflow Clarity

Multi-step flows are explicitly sequenced with validation checkpoints and feedback loops: the profile-init/doctor diagnostic sequence, the discover-then-transact decision table, the checkout loop (introspect schema → destination → selected_option_ids → complete), the error-processing order (unrecoverable → recoverable → buyer input → buyer review), and the totals-verification rule that blocks autonomous completion on mismatch. This matches the anchor requiring explicit validation, recovery loops, and ordered escalation.

5 / 5

Progressive Disclosure

No bundle files exist, so everything is inline in a ~240-line body; sections are clearly signaled with headers, decision tables, and bolded contracts, making navigation easy, and most content is core operational guidance that belongs in SKILL.md. However, the detailed sub-contracts (message display table, totals rendering pseudocode, search field-group docs) are candidates for one-level-deep reference files, keeping it below the top anchor.

4 / 5

Total

17

/

20

Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is exemplary: it explicitly states both what the skill does and when to use it, quotes natural user phrasings as triggers, enumerates concrete operations including subcommands, and delimits a distinctive niche. Length is justified — every clause adds trigger surface or capability coverage rather than padding.

DimensionReasoningScore

Specificity

Enumerates multiple concrete actions — "find, compare, buy, or track products", "global catalog search", "order tracking", "`ucp profile init`", "`ucp doctor`", "carts, checkout, orders" — plus fallback behavior, matching the comprehensive-coverage anchor. Voice stays third-person ("the user wants"), so no voice penalty applies.

5 / 5

Completeness

Opens with an explicit "Use when the user wants to use the UCP CLI to..." trigger clause and separately lists what the skill does (catalog search, merchant transactions, tracking, profile setup/troubleshooting, fallback handoff). Both what and when are explicit with concrete trigger phrases.

5 / 5

Trigger Term Quality

Quotes natural user phrasings verbatim ("find me X under $Y", "buy this from Z.com") alongside common nouns and verbs users would actually say (compare, carts, checkout, orders, track, set up, troubleshoot). Coverage includes synonym phrasings, matching the top anchor.

5 / 5

Distinctiveness Conflict Risk

A clear niche (UCP CLI commerce against UCP-supporting merchants) with distinct triggers naming the tool and protocol. Overlap risk with generic shopping or search skills is minimal because the tool name and merchant-scoped vocabulary are specific.

5 / 5

Total

20

/

20

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

15

/

16

Passed

Repository

openai/plugins

Path

plugins/shopify/skills/ucp/SKILL.md

Reviewed

Table of Contents

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