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.
git clone --depth 1 https://github.com/eddiebelaval/squireWrote 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.
[](https://agentmods.dev/commands/eddiebelaval/squire/feature-dev-guide)<a href="https://agentmods.dev/commands/eddiebelaval/squire/feature-dev-guide"><img src="https://agentmods.dev/badge/commands/eddiebelaval/squire/feature-dev-guide/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.
<a href="https://agentmods.dev/commands/eddiebelaval/squire/feature-dev-guide"><img src="https://agentmods.dev/badge/commands/eddiebelaval/squire/feature-dev-guide.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.02308 |
| Opus 5 | $0.00000 | $0.01154 |
| Sonnet 5 | $0.00000 | $0.00462 |
| Haiku 4.5 | $0.00000 | $0.00231 |
Grade A, and why
feature-dev-guide 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 469 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/feature-dev - Your Personal Development Mentor
What Makes This Command Special? 🌟
This isn't just building a feature - it's a complete learning experience. Think of it as having a patient senior developer sitting next to you, teaching you professional practices while building real features.
How It's Different
Other Commands:
/start feature-name
→ Creates branch, plans, ready to code
→ Fast and efficient
/feature-dev:
/feature-dev
→ Discovers user needs
→ Explains technical decisions
→ Teaches as it builds
→ Educational + productive
The Complete Journey 🗺️
Phase 1: Discovery (10 min)
What happens:
- Understand the problem
- Define success criteria
- Explore alternatives
What you learn:
- Product thinking
- User-first approach
- Scope definition
Phase 2: Planning (15 min)
What happens:
- Search existing codebase
- Break down components
- Estimate complexity
What you learn:
- Code exploration
- Architecture thinking
- Resource planning
Phase 3: Setup (5 min)
What happens:
- Create feature branch
- Build todo list
- Confirm approach
What you learn:
- Git workflow
- Task breakdown
- Planning methodology
Phase 4-6: Building (1-4 hours)
What happens:
- Data structures first
- Then logic
- Then UI
- Polish throughout
What you learn:
- Bottom-up development
- Component architecture
- State management
- Error handling
- Accessibility
- Loading states
Phase 7: Quality (30 min)
What happens:
- Write tests
- Visual testing with Playwright
- Documentation
What you learn:
- Testing strategies
- Automation
- Documentation practices
Phase 8: Ship (15 min)
What happens:
- Final review
- Create PR
- Celebrate!
What you learn:
- Quality checklist
- PR best practices
- Professional delivery
Real Example Walkthrough
User Says:
/feature-dev
Claude Responds:
🎓 Welcome to Feature Development Workshop!
I'm going to walk you through building a feature
like a professional developer would - step by step,
teaching you along the way.
Let's start with understanding what you want to build.
❓ What problem are you trying to solve?
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.
- 5d ago First seen · 469 lines · 0 tokens per session scan A 89f9485877a5
feature-dev-guide is a command published in the GitHub repository eddiebelaval/squire (21 stars, last pushed 23d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,308 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 2026-09-03.
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