SkillProof tested Claude skills

Guides built on test data · page 6 of 6

The SkillProof blog

Podium chart of tested Claude skills with a 9.6 score and a coral asterisk

Jul 4, 2026 · 13 min read

15 Best Claude Code Skills in 2026 — Tested & Scored

We installed and tested 45 Claude skills against baselines. These 15 scored highest, with test notes, scores out of 10 and who should install each.
Terminal window with the cp install command and an arrow pointing into the Claude skills folder

Jul 4, 2026 · 12 min read

How to Install Claude Skills: Code, Desktop, Web (2026)

Install Claude skills in Claude Code, Desktop and claude.ai: exact folder paths, a git clone example, and fixes for skills that never trigger.
Illustration of a SKILL.md file card with an Anthropic-style asterisk and a green verified checkmark

Jul 4, 2026 · 14 min read

What Are Claude Skills? The Complete Guide (2026)

Claude skills explained: what they are, how they differ from prompts and MCP, where they live on disk, and how to pick ones that actually work.
Two circles compared: a green asterisk for skills versus a coral node graph for MCP servers

Jul 3, 2026 · 11 min read

Claude Skills vs MCP: Which One Do You Actually Need?

Skills change how Claude thinks; MCP servers change what it can touch. Setup time, token cost, and security compared, with five real scenarios.
Megaphone and an ascending bar chart with a verified checkmark for marketing skills

Jul 2, 2026 · 11 min read

Claude Skills for Marketing: The Tested Stack (2026)

The marketing skills that survived real testing: SEO audits, copywriting, email sequences, A/B testing. What to install, in what order, and what to skip.
Target with an arrow and an opened envelope with a green check — sales outreach that gets replies

Jul 1, 2026 · 11 min read

Claude Skills for Sales: Outbound That Gets Replies

Sales skills tested with live sends and real accounts: cold email, account research, call prep, pipeline review. What earned replies and what to avoid.
SKILL.md file with frontmatter lines and a coral pen writing a new Claude skill

Jun 30, 2026 · 13 min read

How to Create a Claude Skill: Write SKILL.md in 10 Minutes

Create a Claude skill step by step: an annotated SKILL.md template, trigger descriptions that fire, a local test checklist, and how to get it listed.
Split image: a solid green check versus a broken dashed circle with a coral cross, 50/50

Jun 29, 2026 · 13 min read

Why Half of Claude Skills Don't Work — Test Data

We install and test Claude skills for a living. Half fail on install, triggering, or output. The patterns behind the failures — with data.
Cost gauge with the needle in the green zone and a coral dollar coin trending down

Jun 28, 2026 · 13 min read

Reduce Claude Token Usage: 6 Fixes That Cut Real Costs

Where Claude Code tokens actually go, and six fixes that cut the bill: skills over pasted prompts, CLAUDE.md hygiene, MCP pruning, model routing.
Shield with a keyhole surrounded by warning asterisks — Claude skills security checklist

Jun 27, 2026 · 13 min read

Claude Skills Security: Risks & Pre-Install Checklist

Skills are third-party instructions for your AI. Prompt injection, hidden network calls, data exfiltration patterns — and the 2-minute check before installing.