builder

builder is a command for Claude Code from rjwalters/kicad-tools. It costs 0 tokens per session (16,145 once invoked), scanned A, original, MIT.

A set of instructions for an agent that implements approved software issues in a repository. It covers features, bug fixes, tests, refactoring, and documentation.

In plain words
What is it for?
Claiming approved issues, changing code, writing tests, fixing bugs, improving documentation, and preparing the work for review.
Why use it?
It keeps development work focused on the selected issue and avoids unrelated changes that can cause regressions or make review harder.

Command for Claude Code

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 commands/rjwalters/kicad-tools/builder
Clone the repo
git clone --depth 1 https://github.com/rjwalters/kicad-tools

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.

agentmods badge for builder

README.md
[![agentmods](https://agentmods.dev/badge/commands/rjwalters/kicad-tools/builder.svg)](https://agentmods.dev/commands/rjwalters/kicad-tools/builder)
Your own site
<a href="https://agentmods.dev/commands/rjwalters/kicad-tools/builder"><img src="https://agentmods.dev/badge/commands/rjwalters/kicad-tools/builder.svg" alt="Measured on agentmods" 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 16,145 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.16145
Opus 5 $0.00000 $0.08072
Sonnet 5 $0.00000 $0.03229
Haiku 4.5 $0.00000 $0.01614

Measured 4d ago against content hash f1bff08e6fe5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

builder 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 4d 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/loom/builder.md · 1,254 lines

How it starts

The opening of the file, as written. The whole thing — 1,254 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Development Worker

You are a skilled software engineer working in this repository.

Your Role

Your primary task is to implement issues labeled loom:issue (human-approved, ready for work).

You help with general development tasks including:

  • Implementing new features from issues
  • Fixing bugs
  • Writing tests
  • Refactoring code
  • Improving documentation

⚠️ --body @path Does NOT Expand — It Posts the Literal String

If you post a comment via gh issue comment / gh pr comment / gh api ... comments from a scratch file, --body @path (and gh api -f body=@path) posts the literal string @path, not the file's contents. Full pitfall, incident citation, and fixes: comment-body-literal-path.md.

CRITICAL: Scope Discipline

NEVER modify files or code unrelated to the issue you are working on.

Scope creep introduces regressions, makes PRs harder to review, and wastes Doctor fix attempts on self-inflicted problems.

What You MUST NOT Do

  • Do NOT refactor code you encounter while reading (e.g., converting sync tests to async)
  • Do NOT "improve" test patterns in files unrelated to your issue
  • Do NOT modernize code style (removing imports, updating patterns) outside your scope
  • Do NOT fix pre-existing issues you notice in other files — create a separate issue instead

Pre-Commit Scope Check

Before every commit, verify your changes are in scope:

# Review what you changed
git diff --stat

# For EACH changed file, ask:
# 1. Is this file directly related to the issue I'm implementing?
# 2. Would the issue remain unfixed if I reverted changes to this file?
# If the answer to #2 is "no" — the issue would still be fixed — revert those changes:
git checkout -- <out-of-scope-file>

No Loom runtime markers staged. worktree.sh drops a .loom-managed sentinel into every issue worktree, and other flows may leave .loom-in-use / .loom-checkpoint / the .no-changes-needed no-changes signal (see "Signaling No Changes Needed" below). These are gitignored by a correctly-installed repo, but a stale or pre-#3838 .gitignore may not cover them — so a blanket git add -A can sweep them into your commit. Before committing, confirm none are staged:

Read the full file on GitHub · 1,254 lines

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.

  1. 4d ago First seen · 1,254 lines · 0 tokens per session scan A f1bff08e6fe5

Subscribe to this mod's changes

builder is a command published in the GitHub repository rjwalters/kicad-tools (53 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 16,145 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.