A system for designing and refining Claude Code skills through intent analysis, prompting methods, and structured engineering.

Use it to create new skills or improve existing ones for complex, specialized workflows.

It gives skill creation a repeatable process, which helps when a simple template is not enough.

skill-forge — Skill for Claude Code and Codex by DNYoussef

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add DNYoussef/context-cascade --skill skill-forge

Clone the repo

git clone --depth 1 https://github.com/DNYoussef/context-cascade

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/dnyoussef/context-cascade/skill-forge/github.svg)](https://agentmods.dev/skills/dnyoussef/context-cascade/skill-forge)

Your own site

<a href="https://agentmods.dev/skills/dnyoussef/context-cascade/skill-forge"><img src="https://agentmods.dev/badge/skills/dnyoussef/context-cascade/skill-forge/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/dnyoussef/context-cascade/skill-forge"><img src="https://agentmods.dev/badge/skills/dnyoussef/context-cascade/skill-forge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,188 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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.02188
Opus 5.5	$0.00000	$0.00875
Sonnet 5.5	$0.00000	$0.00438
Haiku 4.5	$0.00000	$0.00219

Measured 1mo ago against content hash c5f24485ec3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skill-forge 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 1mo ago.

The scan reads SKILL.md. This mod also ships 8 executable files (resources/package_skill.py, resources/scripts/package_skill.py, resources/scripts/validate_skill.py, …), 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/foundry/skill-forge/SKILL.md · 204 lines

How it starts

The opening of the file, as written. The whole thing — 204 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/============================================================================/ /* SKILL-FORGE SKILL :: VERILINGUA x VERIX EDITION / /============================================================================*/

name: skill-forge version: 3.0.1 description: | [assert|neutral] Advanced skill creation system for Claude Code that combines deep intent analysis, evidence-based prompting principles, and systematic skill engineering. Use when creating new skills or refining exist [ground:given] [conf:0.95] [state:confirmed] category: foundry tags:

foundry
creation
meta-tools author: ruv cognitive_frame: primary: evidential goal_analysis: first_order: "Execute skill-forge workflow" second_order: "Ensure quality and consistency" third_order: "Enable systematic foundry processes"

/----------------------------------------------------------------------------/ /* S0 META-IDENTITY / /----------------------------------------------------------------------------*/

[define|neutral] SKILL := { name: "skill-forge", category: "foundry", version: "3.0.1", layer: L1 } [ground:given] [conf:1.0] [state:confirmed]

/----------------------------------------------------------------------------/ /* S1 COGNITIVE FRAME / /----------------------------------------------------------------------------*/

[define|neutral] COGNITIVE_FRAME := { frame: "Evidential", source: "Turkish", force: "How do you know?" } [ground:cognitive-science] [conf:0.92] [state:confirmed]

Kanitsal Cerceve (Evidential Frame Activation)

Kaynak dogrulama modu etkin.

/----------------------------------------------------------------------------/ /* S2 TRIGGER CONDITIONS / /----------------------------------------------------------------------------*/

[define|neutral] TRIGGER_POSITIVE := { keywords: ["skill-forge", "foundry", "workflow"], context: "user needs skill-forge capability" } [ground:given] [conf:1.0] [state:confirmed]

/----------------------------------------------------------------------------/ /* S3 CORE CONTENT / /----------------------------------------------------------------------------*/

Read the full file on GitHub · 204 lines

Files

What ships with it

46 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

1mo ago First seen · 204 lines · 0 tokens per session scan A c5f24485ec3d

Subscribe to this mod's changes

skill-forge is a skill published in the GitHub repository DNYoussef/context-cascade (32 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,188 tokens. 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 2026-09-03.

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