skill-forge-plan

skill-forge-plan is a skill for Claude Code, Codex from AgriciDaniel/skill-forge. It costs 56 tokens per session (1,345 once invoked), scanned A, original, MIT.

A planning guide for designing new Claude Code skills, which are reusable instructions for a coding assistant. It turns a domain, user needs, triggers, tools, and complexity into a proposed architecture and file structure.

In plain words
What is it for?
Use it to define use cases, map each use case to steps and expected results, choose a complexity level, and plan the files and tools the skill will need.
Why use it?
It helps decide what the skill should cover and whether it needs separate sub-skills, scripts, external tools, or reference documents before implementation begins.

Skill for Claude CodeCodex

Part of the skill-forge plugin — 9 skills, 8 agents shipped together

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.

agentmods
npx agentmods add skills/agricidaniel/skill-forge/skill-forge-plan
Any agent
npx skills add AgriciDaniel/skill-forge --skill skill-forge-plan
Clone the repo
git clone --depth 1 https://github.com/AgriciDaniel/skill-forge

Made for: Claude Code, Codex.

Or install skill-forge, the plugin that ships this one along with the rest of its 9 skills, 8 agents.

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 skill-forge-plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/agricidaniel/skill-forge/skill-forge-plan.svg)](https://agentmods.dev/skills/agricidaniel/skill-forge/skill-forge-plan)
Your own site
<a href="https://agentmods.dev/skills/agricidaniel/skill-forge/skill-forge-plan"><img src="https://agentmods.dev/badge/skills/agricidaniel/skill-forge/skill-forge-plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,345 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00056 $0.01345
Opus 5 $0.00028 $0.00673
Sonnet 5 $0.00011 $0.00269
Haiku 4.5 $0.00006 $0.00135

Measured 4d ago against content hash 31b1129349e7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-forge-plan 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 4d ago.

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/skill-forge-plan/SKILL.md · 213 lines

How it starts

The opening of the file, as written. The whole thing — 213 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Architecture & Design Planning

Process

Step 1: Domain Discovery

Ask the user these questions (adapt based on context):

  1. What domain is this skill for? (e.g., SEO, advertising, DevOps, data analysis)
  2. What are the top 2-3 use cases? What should users be able to accomplish?
  3. What trigger phrases would users say? List 5-10 natural language triggers.
  4. Does it need external tools? MCP servers, APIs, CLI tools?
  5. Who is the target user? Developer, marketer, analyst, general user?

Step 2: Use Case Decomposition

For each use case, define:

Use Case: [Name]
Trigger: User says "[phrases]"
Steps:
1. [First action]
2. [Decision point or validation]
3. [Next action]
Result: [What success looks like]
Tools Needed: [built-in, MCP, scripts]

Step 3: Complexity Tier Assessment

Evaluate based on answers:

Signal Tier 1 Tier 2 Tier 3 Tier 4
Use cases 1-2 2-3 4-8 8+
Needs scripts? No Yes Maybe Yes
Sub-skills needed? No No Yes Yes
Parallel execution? No No No Yes
Reference docs? No Maybe Yes Yes
Industry templates? No No Maybe Yes

Decision matrix:

  • Single workflow, no scripts -> Tier 1 (minimal)
  • Needs deterministic validation -> Tier 2 (workflow)
  • Multiple distinct workflows -> Tier 3 (multi-skill)
  • Complex domain with parallel delegation -> Tier 4 (ecosystem)

Step 4: Architecture Design

Based on tier, generate the architecture:

Tier 1 Output:

skill-name/
  SKILL.md

Tier 2 Output:

skill-name/
  SKILL.md
  scripts/
    validate.py
    process.py
  references/
    domain-knowledge.md

Tier 3 Output:

skill-name/              # Main orchestrator
  SKILL.md
  references/
    shared-reference.md
skills/
  skill-name-sub1/
    SKILL.md
  skill-name-sub2/
    SKILL.md

Tier 4 Output:

skill-name/              # Main orchestrator
  SKILL.md
  references/
    ref1.md
    ref2.md
  scripts/
    script1.py
    script2.py
  assets/
    template1.md
    template2.md
skills/
  skill-name-sub1/
    SKILL.md
  skill-name-sub2/
    SKILL.md
  ...
agents/
  skill-name-role1.md
  skill-name-role2.md

Read the full file on GitHub · 213 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. 4d ago First seen · 213 lines · 56 tokens per session scan A 31b1129349e7

Subscribe to this mod's changes

skill-forge-plan is a skill published in the GitHub repository AgriciDaniel/skill-forge (166 stars, last pushed 4mo ago), licensed MIT. It adds 56 tokens to every session and 1,345 once invoked, about $0.0003 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 2026-08-30.

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