google-oss

📐 Engineering Standards

Compliance and licensing guide for Google Open Source repositories and personal open-source projects published by Googlers. Enforces source file license headers (such as Apache-2.0) using addlicense, verifies license files, inserts required non-official product disclaimers, and audits pre-release compliance. Activate when preparing Google Open Source or Googler personal projects for release, applying copyright headers, or adding required disclaimers.

Version: v0.1.2 License: Apache-2.0 Author: Daniela Petruzalek (daniela@danicat.dev) Digest: 7157d815
0
Workspace Install
npx skills add danicat/skills --skill google-oss -y
Global Install
npx skills add danicat/skills -g --skill google-oss -y
JIT Load (On-demand streaming into context)
kungfu load google-oss
Learn (Persist locally or globally with -g)
kungfu learn google-oss
📄 Raw SKILL.md 🐙 GitHub Source ← Back to Catalog

Google Open Source Compliance & License Attributions #

Audit, apply, and verify Google Open Source policy requirements, source code license headers (addlicense), and mandatory repository disclaimers.

⚡ Quick Reference: Actions & Commands #

1. Apply License Headers via addlicense #

Install the official Google addlicense tool if not already present:

bash 
go install github.com/google/addlicense@latest

Apply Apache-2.0 copyright headers across all source files:

bash 
$(go env GOPATH)/bin/addlicense -c "Google LLC" -l apache .

Verify/Check without modifying (CI gate):

bash 
$(go env GOPATH)/bin/addlicense -check -c "Google LLC" -l apache .

Common license flag options:

  • -l apache: Apache License 2.0 (standard default for Google OSS)
  • -l mit: MIT License
  • -l bsd: BSD 3-Clause License
  • -s=only: Force SPDX short identifier style (// SPDX-License-Identifier: Apache-2.0)
  • -ignore "vendor/**": Ignore specific directory globs

2. Mandatory README Disclaimers #

Every repository published by Googlers or under Google open source that is not an official Google product MUST include the appropriate disclaimer in the root README.md.

Standard Non-Official Product Disclaimer: #

markdown 
---

## Disclaimer

This is not an officially supported Google product.

Experimental / Educational Project Disclaimer: #

markdown 
---

## Disclaimer

This is not an officially supported Google product. It is an experimental project created for educational and development purposes.

📋 Pre-Release Compliance Checklist #

Before publishing or tagging any public open-source repository, verify:

  1. License Header Coverage:
    • Run addlicense -check across all code files (.go, .py, .ts, .js, .rs, .c, .cpp, .sh, .proto).
    • Ensure generated files (e.g. *.pb.go) or third-party code in vendor/ or third_party/ are properly ignored or attributed.
  2. Root LICENSE File:
    • Ensure an unmodified copy of the chosen license (e.g. Apache 2.0) exists at the repository root.
  3. Non-Official Product Disclaimer:
    • Present at the bottom of root README.md.
  4. Zero Internal Contamination:
    • No internal links, internal issue trackers, intranet shortcuts, corporate credentials, or non-public project codenames.

📚 References & Scripts #