Modsmith
Patterns, cost review and ready templates for Claude Mods (Claude Code plugins whose behaviour is a function-hooks module). Adds what the built-in mod authoring does not: proven designs (fork-check-draw, tool + ledger, mode registry, artifact-backed state), prompt-cache and token-cost review, a vetting pass for someone else's mod, and rules for mods that compose. USE WHEN: build a mod, make a claude mod, mod templates, quiz me after each turn, assumptions tool / register_assumption, supervisor that checks the turn, next-steps check, mode selector / mode registry, effort by domain, model router that keeps the cache, prompt cache cost of a mod, what does this mod cost per turn, review or vet someone's mod before installing, mods that work together, Kanban artifact as shared project state. NOT FOR: classic shell-command hooks in settings.json (PreToolUse etc.), a plain skill or slash command, MCP server authoring, or looking up the hooks API itself (use the engine's plugin-authoring guidance and generated types).
Security AStatic scan found no risk patternsHow grading works ›
From the source SKILL.md
Claude Code ships its own mod authoring: the plugin-authoring skill and the generated declarations (claude-code.d.ts, written beside every mod as .claude-plugin/types/claude-code/index.d.ts and by /plugin-types). Those are the API. This skill does not re-teach it. It adds four things on top:
What this skill does
Modsmith is a community-contributed Claude Code skill in the agile sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/modsmith/ and loads when your prompt matches the skill's trigger.
When to invoke it: USE WHEN: build a mod, make a claude mod, mod templates, quiz me after each turn, assumptions tool / register_assumption, supervisor that checks the turn, next-steps check, mode selector / mode registry, effort by domain, model router that keeps the cache, prompt cache cost of a mod, what does this mod cost per turn, review or vet someone's mod before installing, mods that work together, Kanban artifact as shared project state. NOT FOR: classic shell-command hooks in settings.
Who uses this skill
The Modsmith Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/modsmith
curl -L https://claudskills.com/skills/modsmith/SKILL.md \
-o ~/.claude/skills/modsmith/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/modsmith/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/modsmith/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\modsmith\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Modsmith Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/modsmith/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Modsmith skill do?
Patterns, cost review and ready templates for Claude Mods (Claude Code plugins whose behaviour is a function-hooks module). Adds what the built-in mod authoring does not: proven designs (fork-check-draw, tool + ledger, mode registry, artifact-backed state), prompt-cache and token-cost review, a vetting pass for someone else's mod, and rules for mods that compose. USE WHEN: build a mod, make a claude mod, mod templates, quiz me after each turn, assumptions tool / register_assumption, supervisor that checks the turn, next-steps check, mode selector / mode registry, effort by domain, model router that keeps the cache, prompt cache cost of a mod, what does this mod cost per turn, review or vet someone's mod before installing, mods that work together, Kanban artifact as shared project state. NOT FOR: classic shell-command hooks in settings.json (PreToolUse etc.), a plain skill or slash command, MCP server authoring, or looking up the hooks API itself (use the engine's plugin-authoring guidance and generated types).
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Modsmith skill?
Use Modsmith when your Claude Code task falls under the Product category — specifically in the agile area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Modsmith" or describe the task and let Claude pick). Browse related skills at
/category/product/.
What is a Claude Code skill and how does the Modsmith skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Modsmith is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
DannyMac180. (2026). Modsmith [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/modsmith/
BibTeX
@misc{modsmith-2026,
author = {DannyMac180},
title = {Modsmith [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/modsmith/}
}Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Badge
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Security scan
Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
- ✓ Prompt injection
- ✓ Data exfiltration
- ✓ Supply chain
- ✓ Reverse shell
- ✓ Credentials
- ✓ Execution
- ✓ Filesystem
- ✓ Persistence
- ✓ Obfuscation
- ✓ Network
Show this grade on your repo (click to copy):
[](https://claudskills.com/skills/modsmith/#security)
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