A command that reads the development rules relevant to a task before code is written. It discovers the project's packages and specification layers, then points to the guideline files that apply.

Use it before implementing backend, frontend, testing, documentation, or other changes that must follow the project's `.trellis/spec/` guidelines.

It reduces the risk of starting work without knowing the project's coding standards, patterns, or required checks. This is especially useful when different packages or work types have different rules.

How lxyer/multi-agent-collaboration-system configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to lxyer/multi-agent-collaboration-system. 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/lxyer/multi-agent-collaboration-system/main/.claude/commands/trellis/before-dev.md

Clone the repo

git clone --depth 1 https://github.com/lxyer/multi-agent-collaboration-system

Made for: Claude Code.

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/commands/lxyer/multi-agent-collaboration-system/before-dev/github.svg)](https://agentmods.dev/commands/lxyer/multi-agent-collaboration-system/before-dev)

Your own site

<a href="https://agentmods.dev/commands/lxyer/multi-agent-collaboration-system/before-dev"><img src="https://agentmods.dev/badge/commands/lxyer/multi-agent-collaboration-system/before-dev/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/commands/lxyer/multi-agent-collaboration-system/before-dev"><img src="https://agentmods.dev/badge/commands/lxyer/multi-agent-collaboration-system/before-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 277 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	$0.00277
Opus 5.5	$0.00000	$0.00111
Sonnet 5.5	$0.00000	$0.00055
Haiku 4.5	$0.00000	$0.00028

Measured 1mo ago against content hash dd926596f313, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

before-dev 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.

.claude/commands/trellis/before-dev.md · 30 lines

What it actually says

Read the relevant development guidelines before starting your task.

Execute these steps:

Discover packages and their spec layers:

python3 ./.trellis/scripts/get_context.py --mode packages

Identify which specs apply to your task based on:
- Which package you're modifying (e.g., cli/, docs-site/)
- What type of work (backend, frontend, unit-test, docs, etc.)
Read the spec index for each relevant module:
```
cat .trellis/spec/<package>/<layer>/index.md
```
Follow the "Pre-Development Checklist" section in the index.
Read the specific guideline files listed in the Pre-Development Checklist that are relevant to your task. The index is NOT the goal — it points you to the actual guideline files (e.g., error-handling.md, conventions.md, mock-strategies.md). Read those files to understand the coding standards and patterns.
Always read shared guides:
```
cat .trellis/spec/guides/index.md
```
Understand the coding standards and patterns you need to follow, then proceed with your development plan.

This step is mandatory before writing any code.

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.

1mo ago First seen · 30 lines · 0 tokens per session scan A dd926596f313

Subscribe to this mod's changes

before-dev is a command published in the GitHub repository lxyer/multi-agent-collaboration-system (1 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 277 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.

Multi-Agent ai ai-workflow cli macs terminal

multi-agent-collaboration-system: Command for Claude Code

Borrowing it

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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