create-skill

create-skill is a skill for Claude Code from QBall-Inc/the-bulwark. It costs 42 tokens per session (10,028 once invoked), scanned A, original, MIT.

A generator for creating Claude Code skills from requirements. It interviews the user, classifies the skill's design, generates the files with a sub-agent, validates them, and explains the resulting structure.

In plain words
What is it for?
It is for creating, scaffolding, and designing new Claude Code skills with generated files and validation.
Why use it?
It turns an informal skill idea into a checked scaffold without requiring the developer to design every file and workflow detail manually.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; mentions subagents; names the AskUserQuestion tool.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the the-bulwark plugin — 30 skills, 17 agents, 6 hooks shipped together

Good fit It is for creating, scaffolding, and designing new Claude Code skills with generated files and validation.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add QBall-Inc/the-bulwark
Claude Code
/plugin install the-bulwark

Made for: Claude Code.

Or install the-bulwark, the plugin that ships this one along with the rest of its 30 skills, 17 agents, 6 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for create-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/qball-inc/the-bulwark/create-skill.svg)](https://agentmods.dev/skills/qball-inc/the-bulwark/create-skill)
Your own site
<a href="https://agentmods.dev/skills/qball-inc/the-bulwark/create-skill"><img src="https://agentmods.dev/badge/skills/qball-inc/the-bulwark/create-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 10,028 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.10028
Opus 5 $0.00021 $0.05014
Sonnet 5 $0.00008 $0.02006
Haiku 4.5 $0.00004 $0.01003

Measured 8d ago against content hash 25f8a14d7b42, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

create-skill scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/check-description.ts, scripts/check-skill-size.ts, scripts/grade.ts, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/create-skill/SKILL.md · 560 lines

How it starts

The opening of the file, as written. The whole thing — 560 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create Skill

Generates a complete Claude Code skill from a description or requirements document. Conducts an adaptive interview to understand the skill's purpose, classifies it into one of 7 archetypes (Generator, Tool Wrapper, Pipeline, Research, Script-driven, Reviewer, Inversion), surfaces candidate sub-patterns for the chosen archetype, spawns a Sonnet sub-agent to generate the files, validates with anthropic-validator, and presents the scaffold with architectural decisions.


When to Use This Skill

Load this skill when the user request matches ANY of these patterns:

Trigger Pattern Example User Request
Skill creation "Create a new skill", "Make a skill for X"
Scaffolding "Scaffold a skill", "Set up a new skill"
Generation "Generate a skill that does X"
Skill design "Design a skill for X", "I need a skill that does X"

DO NOT use for:

  • Editing existing skills (edit directly)
  • Creating standalone sub-agents (use create-subagent)
  • Debugging skill issues (use issue-debugging)
  • Validating existing skills (use anthropic-validator)

Dependencies

Category Files Requirement When to Load
Decision framework references/decision-framework.md REQUIRED Load at Stage 0 for interview + classification
Content guidance references/content-guidance.md REQUIRED Include in Stage 2 generator prompt
Skill templates references/template-*.md REQUIRED Load the matching template at Stage 2
Agent template references/agent-template.md REQUIRED Include in Stage 2 prompt when archetype = Pipeline
Agent conventions references/agent-conventions.md REQUIRED Include in Stage 2 prompt when archetype = Pipeline
Diagnostic template templates/diagnostic-output.yaml REQUIRED Use at Stage 6
Subagent prompting subagent-prompting skill REQUIRED Load at Stage 0 for 4-part prompt template
Eval shape references/eval-shape.md REQUIRED when scaffolding evals/ data Schema for evals.json / triggers.json / compliance.json (Layer 1 DATA)
Eval scaffolding references/eval-scaffolding.md REQUIRED Per-archetype emission guide for Stage 2 — defines default grading_mode, assertion templates, sub-pattern × eval impact, placeholder substitution markers
Scripts conventions references/scripts-conventions.md REQUIRED when bundles_scripts = true (Stage 1) Per-skill scripts/ directory invocation convention (${CLAUDE_PLUGIN_ROOT} pattern), Justfile recipe pattern, bun runtime prerequisite
Eval grader agent agents/skill-eval-grader.md Bundled (no external load) scripts/grade.ts returns SKIPPED for fuzzy assertions and emits a manual-invoke directive pointing at this agent. The orchestrator (or a future automation step) invokes the grader against evidence_paths to complete grading.
Eval comparator agent agents/skill-eval-comparator.md Bundled (no external load) Blind A/B comparison of two grading runs. Invoked manually with two grading-<timestamp>.json paths; not auto-spawned by grade.ts.

Read the full file on GitHub · 560 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 560 lines · 42 tokens per session scan A 25f8a14d7b42

Subscribe to this mod's changes

create-skill is a skill published in the GitHub repository QBall-Inc/the-bulwark (8 stars, last pushed today), licensed MIT. It adds 42 tokens to every session and 10,028 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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