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nft-standards

Implement NFT standards (ERC-721, ERC-1155) with proper metadata handling, minting strategies, and marketplace integration. Use when creating NFT contracts, building NFT marketplaces, or implementing digital asset systems.

64

Quality

81%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

65%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 delivers substantial executable Solidity examples across the main NFT patterns, but is organized as a monolithic catalog: boilerplate filler sections, incomplete code fragments in the on-chain metadata example, no validation guidance, and no use of reference files despite its length.

Suggestions

Remove the generic boilerplate sections ('Do not use this skill when', 'Instructions') and replace them with concrete guidance specific to NFT implementation (e.g., security checks for mint functions, payment-verification patterns).

Add explicit validation checkpoints, such as testing with forge/hardhat before deployment and verifying royalty interface support via supportsInterface, especially for batch mint and payment-handling flows.

Move advanced patterns (ERC-1155 details, dynamic NFTs, ERC721A, marketplace integration notes) into reference files (e.g., references/erc1155.md, references/advanced.md) and keep SKILL.md as a concise overview with clearly signaled links, and complete the on-chain metadata example's missing imports and stub functions.

DimensionReasoningScore

Conciseness

The body is dominated by dense, purposeful Solidity code with minimal prose padding. However, generic boilerplate sections ('Do not use this skill when', the vague 'Instructions' like 'Clarify goals, constraints, and required inputs. Apply relevant best practices and validate outcomes.') add no value and could be trimmed.

4 / 5

Actionability

Most sections provide concrete, executable Solidity (ERC-721, ERC-1155, EIP-2981 royalties, soulbound, ERC721A). A few examples are incomplete: the on-chain metadata contract omits imports (ERC721, Base64, Strings), generateSVG returns '...', and generateMetadata returns ''.

4 / 5

Workflow Clarity

The content is a pattern catalog with no real sequence; the 'Instructions' section is generic with no concrete validation checkpoints. For minting flows that involve batch operations and payments, there are no explicit verify/test steps (e.g., forge test, deployment checks), which caps this at 3.

3 / 5

Progressive Disclosure

Section headers are well-organized, but all ~380 lines live in a single SKILL.md with no reference files at all. Advanced patterns (ERC-1155 details, dynamic NFTs, ERC721A, marketplace notes) clearly belong in separate reference files, which keeps this at 3 rather than 4.

3 / 5

Total

14

/

20

Passed

Description

87%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.

A strong description that clearly states concrete capabilities and explicit use-when triggers in a distinct niche. Minor improvements could add trigger synonyms like 'mint' or 'collectibles' and mention advanced capabilities (royalties, soulbound tokens) covered by the skill.

DimensionReasoningScore

Specificity

The description lists several concrete actions ('metadata handling', 'minting strategies', 'marketplace integration') tied to a named domain (ERC-721, ERC-1155). It falls short of 5 only because capabilities demonstrated in the body (royalties, soulbound tokens, dynamic NFTs) are not covered in the description.

4 / 5

Completeness

It explicitly answers both 'what' (implement NFT standards with metadata handling, minting strategies, marketplace integration) and 'when' ('Use when creating NFT contracts, building NFT marketplaces, or implementing digital asset systems') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Natural trigger phrases users would say are present: 'NFT contracts', 'NFT marketplaces', 'digital asset systems', plus standard names 'ERC-721'/'ERC-1155'. A few natural terms like 'mint', 'collectibles', or 'token' are missing, keeping it below 5.

4 / 5

Distinctiveness Conflict Risk

The NFT/ERC-721/ERC-1155 niche is distinct with clear triggers, creating minimal conflict risk with other skills.

5 / 5

Total

18

/

20

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 — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

rmyndharis/antigravity-skills

Path

skills/nft-standards/SKILL.md

Reviewed

Table of Contents

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