What is solid-principles?

A code-review and design aid for object-oriented programs, which are built from interacting classes and objects. It checks five common design principles known as SOLID.

Use it when creating, reviewing, or refactoring object-oriented code to find possible violations of single responsibility, open-closed, substitution, interface segregation, and dependency inversion principles.

It helps reveal designs that are hard to change, extend, test, or reuse before those problems spread through the code.

solid-principles — Skill by lucsedirae

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/lucsedirae/agent_skill_library/solid-principles

Any agent

npx skills add lucsedirae/agent_skill_library --skill solid-principles

Clone the repo

git clone --depth 1 https://github.com/lucsedirae/agent_skill_library

Made for: Claude Code, Codex.

Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 821 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin unknown 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	$0.00091	$0.00821
Opus 5	$0.00046	$0.00411
Sonnet 5	$0.00018	$0.00164
Haiku 4.5	$0.00009	$0.00082

Measured 2d ago against content hash fd8f682ca658, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

solid-principles 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.

The scan reads SKILL.md. This mod also ships 5 executable files (scripts/check_dip.py, scripts/check_isp.py, scripts/check_lsp.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.

solid-principles/SKILL.md · 69 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

10 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.

2d ago First seen · 69 lines · 91 tokens per session scan A fd8f682ca658

Subscribe to this mod's changes

solid-principles is a skill published in the GitHub repository lucsedirae/agent_skill_library (2 stars, last pushed 1mo ago), licensed GPL-3.0. It adds 91 tokens to every session and 821 once invoked, about $0.0005 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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