solidifier: Instructions file for Codex

AGENTS.md

solidifier AGENTS.md is an instructions file for Codex, OpenCode from FernandoJRR/solidifier. It costs 414 tokens per session, scanned A, original, MIT.

Repository guidance for Solidifier, a skill that helps coding agents apply SOLID design principles. It explains the repository layout and how its copies for different agents must stay synchronized.

In plain words
What is it for?
Use it when editing Solidifier's Claude Code, OpenCode, GitHub Copilot, or Codex versions, especially when syncing shared skill content.
Why use it?
It gives agents the project context and prevents shared changes from being made in only one agent-specific copy.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Claude Code; mentions AGENTS.md; mentions Codex.

This is FernandoJRR/solidifier's own configuration. It tells Codex and OpenCode how to work on solidifier itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything solidifier configures →

Reuse

Borrowing it

Nothing to install: this file belongs to FernandoJRR/solidifier. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/FernandoJRR/solidifier/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/FernandoJRR/solidifier

Made for: Codex, OpenCode.

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 solidifier AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/fernandojrr/solidifier/agents-md/github.svg)](https://agentmods.dev/instructions/fernandojrr/solidifier/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/fernandojrr/solidifier/agents-md"><img src="https://agentmods.dev/badge/instructions/fernandojrr/solidifier/agents-md/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.

agentmods 80×15 button for solidifier AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/fernandojrr/solidifier/agents-md"><img src="https://agentmods.dev/badge/instructions/fernandojrr/solidifier/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 414 This file is loaded in full into every session.
When invoked 414 The same file — it is already loaded in full.
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 $0.00414 $0.00414
Opus 5.5 $0.00166 $0.00166
Sonnet 5.5 $0.00083 $0.00083
Haiku 4.5 $0.00041 $0.00041

Measured 1mo ago against content hash 0846fc17531f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

solidifier AGENTS.md 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.

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.

AGENTS.md · 44 lines

What it actually says

AGENTS.md

This file provides context for AI agents working inside this repository.

What this repo is

solidifier is a multi-agent SOLID principles skill. It ships one self-contained copy of the skill per agent so each drops straight into the directory that agent scans.

Structure

  • claude-code/plugins/solidifier/ — Claude Code plugin and skill
  • opencode/solidifier/ — OpenCode skill
  • copilot/solidifier/ — GitHub Copilot skill
  • codex/solidifier/ — OpenAI Codex skill
  • install.sh — installs the right copy for a given agent
  • sync.sh — propagates shared content across all four copies

Rules

  • Never edit only one agent copy and leave the others behind. Run sync.sh after any change to shared skill content.
  • Do not modify .solidifier.json — that file lives in the project being worked on, not here.
  • Do not add abstraction for its own sake. The prime directive of this skill is restraint — apply it to the repo itself.
  • Agent-specific files (agents/openai.yaml, frontmatter variants) are intentionally not synced. Leave them alone unless you are targeting that specific agent.

Skills available in this repo

This repo does not install skills into itself. It is a skill.

AI-generated contributions

If you are an AI agent generating a PR against this repository:

  • You MUST add the label ai-generated to the PR.

  • You MUST include the following block at the top of the PR description:

    > ⚠️ AI-GENERATED PR — requires human review before merge.
    
  • Do NOT auto-merge. Do NOT approve your own PR.

  • A human maintainer must review and approve all AI-generated changes before they are merged.

Failure to follow these rules does not block the PR from being submitted, but it will be closed without review if the label and notice are missing.

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. 1mo ago First seen · 44 lines · 414 tokens per session scan A 0846fc17531f

Subscribe to this mod's changes

solidifier AGENTS.md is an instructions file published in the GitHub repository FernandoJRR/solidifier (40 stars, last pushed 3mo ago), licensed MIT. It adds 414 tokens to every session, about $0.0017 per session on Opus 5.5. 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.

Related

Other instructions, from other repositories