A syntax checker for a language called foo. It checks declarations, arrays, nested arrays, function calls, and loops using rules stored in separate files.

Use it to check foo code, especially declarations, bracketed arrays, nested arrays, function calls, and loops.

It gives a clear valid-or-invalid result and explains which syntax rule was broken.

src — Skill for Claude Code and Codex by mcsee

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 mcsee/Software-Design-Articles --skill src

Clone the repo

git clone --depth 1 https://github.com/mcsee/Software-Design-Articles

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/mcsee/software-design-articles/src/github.svg)](https://agentmods.dev/skills/mcsee/software-design-articles/src)

Your own site

<a href="https://agentmods.dev/skills/mcsee/software-design-articles/src"><img src="https://agentmods.dev/badge/skills/mcsee/software-design-articles/src/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/mcsee/software-design-articles/src"><img src="https://agentmods.dev/badge/skills/mcsee/software-design-articles/src.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 154 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	$0.00154
Opus 5.5	$0.00000	$0.00062
Sonnet 5.5	$0.00000	$0.00031
Haiku 4.5	$0.00000	$0.00015

Measured 3d ago against content hash 4cbe506a5899, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

src 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 3d 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.

Articles/AI Coding Tips/AI Coding Tip 013 - Use Progressive Disclosure/src/SKILL.md · 26 lines

What it actually says

SKILL.md (800 tokens - Modular)

Validates DECLARE statements. It also covers arrays, nested arrays, function calls, and loops.

Rules:

DECLARE detected → load declaration.md
Brackets detected → load array.md
Parentheses detected → load function-call.md

Template: [input] valid? [YES/NO]. Reason: [rule].

declaration.md (1,200 tokens):

First character must be uppercase. Can't start with a number. Examples: DECLARE x, DECLARE foo

array.md (1,500 tokens):

Must use brackets: [item] References nested-array.md for [x] Examples: [foo], [bar], [123]

5 Files total (could be more)

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.

3d ago Changed 4cbe506a5899
1mo ago First seen · 26 lines · 0 tokens per session scan A 8a267e65d644

Subscribe to this mod's changes

src is a skill published in the GitHub repository mcsee/Software-Design-Articles (22 stars, last pushed 3d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 154 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 2026-08-30.

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src