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.
npx agentmods add rules/dalehurley/codewithphp/reference-chaptersgit clone --depth 1 https://github.com/dalehurley/codewithphpWhat 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 | $0.00000 | $0.02758 |
| Opus 5 | $0.00000 | $0.01379 |
| Sonnet 5 | $0.00000 | $0.00552 |
| Haiku 4.5 | $0.00000 | $0.00276 |
Grade A, and why
reference-chapters 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 480 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Reference Chapter Guidelines
Reference chapters serve a different purpose than traditional tutorial chapters. They are designed for quick lookup, copy-paste solutions, and rapid problem-solving rather than step-by-step learning.
What is a Reference Chapter?
A reference chapter is a specialized chapter type that:
- Provides quick solutions to common problems
- Offers copy-paste ready code snippets
- Uses a non-linear structure for easy scanning
- Focuses on practical application over explanation
- Serves as a quick lookup guide or cheat sheet
Types of Reference Chapters
1. Quick Start Guides
Purpose: Get developers productive in 5-15 minutes
Examples: 00-quick-start-guide.md, 00-getting-started.md
Structure:
- Brief introduction ("Got 5 minutes?")
- Clear note that this is a reference guide
- "I Need To..." or "Common Tasks" sections
- Decision trees or flowcharts
- Copy-paste snippets with minimal explanation
- Links to detailed chapters for deeper learning
2. Cheat Sheets
Purpose: Quick reference for syntax, patterns, or common operations Examples: Complexity cheat sheet, PHP functions reference
Structure:
- Organized by category or use case
- Tables, lists, or compact code blocks
- Minimal prose, maximum examples
- Cross-references to detailed documentation
3. Lookup Guides
Purpose: Help developers find the right tool/algorithm for their problem Examples: Algorithm selection guide, framework comparison
Structure:
- Decision trees or flowcharts
- Use case → solution mappings
- When to use X vs Y comparisons
- Performance considerations
Frontmatter for Reference Chapters
Reference chapters use standard frontmatter with a note in difficulty:
---
title: "Quick Start Guide"
description: "Get started in 5 minutes with practical solutions"
series: "series-slug"
chapter: 0
order: 0
difficulty: "beginner" # Or appropriate difficulty
prerequisites: [] # Usually empty for quick starts
---
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.
- yesterday First seen · 480 lines · 0 tokens per session scan A 715ff146b807
reference-chapters is a cursor rule published in the GitHub repository dalehurley/codewithphp (5 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,758 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 2026-08-31.
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