create-import-module

A template for a plain-text module that holds shared definitions and requirements for other modules to import.

In plain words
What is it for?
Use it to create a .plain file in the template/ directory for shared concepts, coding requirements, or testing requirements that other modules can import.
Why use it?
It keeps common definitions, implementation rules, and test requirements in one reusable place instead of repeating them. It also separates these shared rules from functional specifications, which describe what software should do.

Skill for Claude CodeCodex

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/plainlang/plain-forge/create-import-module
Any agent
npx skills add plainlang/plain-forge --skill create-import-module
Clone the repo
git clone --depth 1 https://github.com/plainlang/plain-forge

Made for: Claude Code, Codex.

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,019 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 $0.00060 $0.01019
Opus 5 $0.00030 $0.00509
Sonnet 5 $0.00012 $0.00204
Haiku 4.5 $0.00006 $0.00102

Measured 2d ago against content hash 8b3d3530b84c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create-import-module 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 2d 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.

forge/skills/create-import-module/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create Import Module

Always use the skill load-plain-reference to retrieve the ***plain syntax rules — but only if you haven't done so yet.

What an Import Module Is

An import module is a .plain file that lives in the template/ directory and contains only ***definitions***, ***implementation reqs***, and/or ***test reqs***. It must not contain ***functional specs*** and must not use requires in its frontmatter. Other modules pull in its content via the import field in their YAML frontmatter, gaining access to its definitions and reqs.

Use import modules for:

  • Sharing concept definitions across multiple modules
  • Providing common implementation requirements (e.g., technology stack, coding standards)
  • Providing common test requirements
  • Creating reusable foundational structure (templates)

If the module needs functional specs (i.e., it describes what software should do), it is not an import module — see the create-requires-module skill.

Workflow

  1. Determine what shared content this module should provide — which definitions, implementation reqs, or test reqs will other modules need?
  2. Create the .plain file in the template/ directory with YAML frontmatter. Use required_concepts to declare concepts that importing modules must define. It may optionally import other templates for layered reuse, but must not use requires.
  3. Add the shared content — definitions, implementation reqs, and/or test reqs.
  4. Do not add ***functional specs*** — import modules must not contain functional specs.
  5. Verify concept availability — ensure all :Concepts: referenced are either defined in this module, provided by its own imports, declared as required_concepts, or are predefined concepts.

Format

The import field is a list of module paths in the YAML frontmatter:

---
import:
  - base_template
required_concepts: [":AppName:"]
description: Shared API definitions and reqs
---

***definitions***

- :ApiClient: is the HTTP client used to communicate with external services.

- :ApiResponse: is the response returned by :ApiClient:.

***implementation reqs***

- :Implementation: should handle HTTP errors by raising appropriate exceptions.

- :ApiClient: should support configurable timeouts.

***test reqs***

- :ConformanceTests: should mock all external HTTP calls made by :ApiClient:.

Read the full file on GitHub · 106 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. 2d ago First seen · 106 lines · 60 tokens per session scan A 8b3d3530b84c

Subscribe to this mod's changes

create-import-module is a skill published in the GitHub repository plainlang/plain-forge (55 stars, last pushed 4d ago), licensed MIT. It adds 60 tokens to every session and 1,019 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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