bazel-build-optimization

1# Bazel Build Optimization
2 
3Production patterns for Bazel in large-scale monorepos.
4 
5## Do not use this skill when
6 
7- The task is unrelated to bazel build optimization
8- You need a different domain or tool outside this scope
9 
10## Instructions
11 
12- Clarify goals, constraints, and required inputs.
13- Apply relevant best practices and validate outcomes.
14- Provide actionable steps and verification.
15 
16## Use this skill when
17 
18- Setting up Bazel for monorepos
19- Configuring remote caching/execution
20- Optimizing build times
21- Writing custom Bazel rules
22- Debugging build issues
23- Migrating to Bazel
24 
25## Core Concepts
26 
27### 1. Bazel Architecture
28 
29```
30workspace/
31├── WORKSPACE.bazel       # External dependencies
32├── .bazelrc              # Build configurations
33├── .bazelversion         # Bazel version
34├── BUILD.bazel           # Root build file
35├── apps/
36│   └── web/
37│       └── BUILD.bazel
38├── libs/
39│   └── utils/
40│       └── BUILD.bazel
41└── tools/
42    └── bazel/
43        └── rules/
44```
45 
46### 2. Key Concepts
47 
48| Concept | Description |
49|---------|-------------|
50| **Target** | Buildable unit (library, binary, test) |
51| **Package** | Directory with BUILD file |
52| **Label** | Target identifier `//path/to:target` |
53| **Rule** | Defines how to build a target |
54| **Aspect** | Cross-cutting build behavior |
55 
56## Templates
57 
58### Template 1: WORKSPACE Configuration
59 
60```python
61# WORKSPACE.bazel
62workspace(name = "myproject")
63 
64load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
65…