bazel-build-optimization

bazel-build-optimization is a skill for Claude Code, Codex from EngineerWithAI/engineerwith-agents. It costs 36 tokens per session (2,488 once invoked), scanned A, a copy of bazel-build-optimization, MIT.

A guide to speeding up Bazel builds in large monorepos, including build rules, remote caching, and remote execution. Bazel is a build system that describes projects as reusable build and test units.

In plain words
What is it for?
Use it to configure Bazel workspaces, write custom rules, optimize builds, debug build failures, and set up remote build work.
Why use it?
It helps reduce build times and diagnose configuration problems when a repository becomes large. It also provides patterns for moving an existing project to Bazel.

Skill for Claude CodeCodex

Part of the developer-essentials plugin — 11 skills shipped together

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 skills/engineerwithai/engineerwith-agents/bazel-build-optimization
Any agent
npx skills add EngineerWithAI/engineerwith-agents --skill bazel-build-optimization
Clone the repo
git clone --depth 1 https://github.com/EngineerWithAI/engineerwith-agents

Made for: Claude Code, Codex.

Or install developer-essentials, the plugin that ships this one along with the rest of its 11 skills.

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 bazel-build-optimization

README.md
[![agentmods](https://agentmods.dev/badge/skills/engineerwithai/engineerwith-agents/bazel-build-optimization.svg)](https://agentmods.dev/skills/engineerwithai/engineerwith-agents/bazel-build-optimization)
Your own site
<a href="https://agentmods.dev/skills/engineerwithai/engineerwith-agents/bazel-build-optimization"><img src="https://agentmods.dev/badge/skills/engineerwithai/engineerwith-agents/bazel-build-optimization.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,488 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00036 $0.02488
Opus 5 $0.00018 $0.01244
Sonnet 5 $0.00007 $0.00498
Haiku 4.5 $0.00004 $0.00249

Measured 2d ago against content hash 1119b2ec8f9d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

bazel-build-optimization 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 2d 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.

Origin

This is a copy

100% identical to bazel-build-optimization — 18 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/developer-essentials/skills/bazel-build-optimization/SKILL.md · 386 lines

How it starts

The opening of the file, as written. The whole thing — 386 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bazel Build Optimization

Production patterns for Bazel in large-scale monorepos.

When to Use This Skill

  • Setting up Bazel for monorepos
  • Configuring remote caching/execution
  • Optimizing build times
  • Writing custom Bazel rules
  • Debugging build issues
  • Migrating to Bazel

Core Concepts

1. Bazel Architecture

workspace/
├── WORKSPACE.bazel       # External dependencies
├── .bazelrc              # Build configurations
├── .bazelversion         # Bazel version
├── BUILD.bazel           # Root build file
├── apps/
│   └── web/
│       └── BUILD.bazel
├── libs/
│   └── utils/
│       └── BUILD.bazel
└── tools/
    └── bazel/
        └── rules/

2. Key Concepts

Concept Description
Target Buildable unit (library, binary, test)
Package Directory with BUILD file
Label Target identifier //path/to:target
Rule Defines how to build a target
Aspect Cross-cutting build behavior

Templates

Template 1: WORKSPACE Configuration

# WORKSPACE.bazel
workspace(name = "myproject")

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

# Rules for JavaScript/TypeScript
http_archive(
    name = "aspect_rules_js",
    sha256 = "...",
    strip_prefix = "rules_js-1.34.0",
    url = "https://github.com/aspect-build/rules_js/releases/download/v1.34.0/rules_js-v1.34.0.tar.gz",
)

load("@aspect_rules_js//js:repositories.bzl", "rules_js_dependencies")
rules_js_dependencies()

load("@rules_nodejs//nodejs:repositories.bzl", "nodejs_register_toolchains")
nodejs_register_toolchains(
    name = "nodejs",
    node_version = "20.9.0",
)

load("@aspect_rules_js//npm:repositories.bzl", "npm_translate_lock")
npm_translate_lock(
    name = "npm",
    pnpm_lock = "//:pnpm-lock.yaml",
    verify_node_modules_ignored = "//:.bazelignore",
)

load("@npm//:repositories.bzl", "npm_repositories")
npm_repositories()

# Rules for Python
http_archive(
    name = "rules_python",
    sha256 = "...",
    strip_prefix = "rules_python-0.27.0",
    url = "https://github.com/bazelbuild/rules_python/releases/download/0.27.0/rules_python-0.27.0.tar.gz",
)

load("@rules_python//python:repositories.bzl", "py_repositories")
py_repositories()

Read the full file on GitHub · 386 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. 2d ago First seen · 386 lines · 36 tokens per session scan A 1119b2ec8f9d

Subscribe to this mod's changes

bazel-build-optimization is a skill published in the GitHub repository EngineerWithAI/engineerwith-agents (4 stars, last pushed 7mo ago), licensed MIT. It adds 36 tokens to every session and 2,488 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to bazel-build-optimization, differing in 18 lines, and is treated as a copy.

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