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Complete ISO 286-1 skill for mechanical designers covering: - Fit selection (clearance/transition/interference) with intake protocol - IT grades 1–16 with required machining processes for bores and shafts - Full functional elements reference: rolling bearings, gears, keys (DIN 6885), Seeger rings, cylindrical pins, plain bushings, lip seals, splined profiles, couplings, linear guides (14 sections total) - Fundamental deviations table (bores A–ZC, shafts a–zc, Ø1–500 mm) - Surface roughness Ra correlation by IT grade - Python calculator (scripts/calculate_fit.py) with JSON data files for exact clearance/interference computation and formatted fit data sheet output - Visual input support: analyses attached drawings, sketches, photos - Description ≤ 1024 chars, written in English for optimal trigger accuracy Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude Skills — Mechanical Design Engineer
A collection of custom skills for Claude.ai that transform the assistant into an expert mechanical design engineer with 20+ years of experience.
Repository structure
skills-claude/
├── README.md
├── compress-skills.sh # Script to generate .zip packages
└── <skill-name>/
├── SKILL.md # Main instructions (YAML frontmatter + markdown)
├── reference/ # Technical reference documentation
│ └── *.md
└── scripts/ # Executable helper scripts
└── *.py / *.sh
Prerequisites
unzip— required bydecompress-skills.shto extract.skillarchivessudo apt install unzip # Debian/Ubuntu/WSL brew install unzip # macOS- Python 3 +
PyYAML— required by skill scriptspip install -r requirements.txt
How to install skills on Claude.ai
1. Generate .zip files
chmod +x compress-skills.sh
./compress-skills.sh
The .zip files are created in the dist/ folder.
2. Upload to Claude.ai
- Go to claude.ai → Settings
- Section Features → Skills
- Click Upload skill and upload each
.zipfile fromdist/ - Repeat for every skill
3. Use the skills
Invoke skills with a slash command in chat:
/<skill-name> [problem description]
Skill format (Anthropic spec)
The SKILL.md file contains:
- YAML frontmatter with
name,description,user-invocable - Markdown instructions that define Claude's behaviour
---
name: skill-name
description: What this skill does and when to invoke it
user-invocable: true
argument-hint: [optional argument]
---
# Skill Title
[Detailed instructions in markdown]
References
- ANTHROPIC-SKILLS-DOCS.md — full reference extracted from official docs (structure, frontmatter, best practices, API)
- Anthropic Skills Documentation
- Agent Skills API
- Skill Authoring Best Practices