CtrlK
BlogDocsLog inGet started
Tessl Logo

nodejs-keccak256

Prevent Ethereum hashing bugs in JavaScript and TypeScript. Node's sha3-256 is NIST SHA3, not Ethereum Keccak-256, and silently breaks selectors, signatures, storage slots, and address derivation. Use when hashing for Ethereum in JavaScript or TypeScript, or when a selector, signature, storage slot, or derived address is wrong.

80

Quality

100%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

100%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 content is a tight, example-driven reference that assumes competence and delivers executable code for every major Ethereum JS/TS library plus an audit recipe. It matches the good-overall examples in brevity and actionability.

DimensionReasoningScore

Conciseness

The body is lean and assumes Claude's competence — it states the algorithm mismatch in one sentence and then shows code, with no padding explaining what hashing or libraries are.

5 / 5

Actionability

Provides copy-paste-ready, executable examples across ethers v6, viem, and web3.js plus concrete grep audit commands covering the common real cases.

5 / 5

Workflow Clarity

This is a single-purpose diagnostic skill (no destructive or batch multi-step operation needing validation checkpoints); the audit grep workflow is unambiguous, so the simple-skill exception applies.

5 / 5

Progressive Disclosure

A compact, well-organized single-file skill with clear section headers (When to Use, How It Works, Examples, Rule) and no need for external bundle references; the simple-skill exception applies.

5 / 5

Total

20

/

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 precise, third-person, and packs concrete capabilities plus explicit 'Use when...' triggers tied to observable symptoms. It reads exactly like the phrase a developer would say when hitting this bug.

DimensionReasoningScore

Specificity

Names the domain plus several concrete capabilities ('breaks selectors, signatures, storage slots, and address derivation') and the precise failure mode, giving comprehensive coverage rather than vague language.

5 / 5

Completeness

Explicitly answers both 'what' (prevent Keccak/SHA3 bugs; what silently breaks) and 'when' via a concrete 'Use when...' clause with specific trigger phrases.

5 / 5

Trigger Term Quality

Natural trigger phrasing covers 'hashing for Ethereum in JavaScript or TypeScript' plus symptom terms a user would actually say ('selector, signature, storage slot, or derived address is wrong'), with JS/TS synonyms included.

5 / 5

Distinctiveness Conflict Risk

The niche is sharply defined (Ethereum Keccak-256 vs Node's sha3-256) with distinct, low-overlap triggers, making conflict with unrelated skills minimal.

5 / 5

Total

20

/

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.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
affaan-m/ECC
Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.