google-oss

name	google-oss
description	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.
license	Apache-2.0
metadata	{"category":"standards","tags":"google, open-source, licensing, compliance, standards, copyright","author":"Daniela Petruzalek ([e-mail])","version":"0.1.1","catalog":"https://skills.danicat.dev"}

Google Open Source Compliance & License Attributions

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

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⚡ Quick Reference: Actions & Commands

1. Apply License Headers via addlicense

Install the official Google addlicense tool if not already present:

go install github.com/google/addlicense@latest

Apply Apache-2.0 copyright headers across all source files:

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

Verify/Check without modifying (CI gate):

$(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

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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:

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## Disclaimer

This is not an officially supported Google product.

Community / Experimental Port Disclaimer:

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## Disclaimer

This is not an officially supported Google product. It is a community-driven, experimental port created for educational and development purposes.

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📋 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.

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📚 References & Scripts

• License Header Variations: Full syntax for Apache 2.0, MIT, and BSD across languages.
• Disclaimer Variations: Specific disclaimer templates for samples, tools, and demos.
• Automated Helper Script: Bundled shell script to install addlicense and apply headers.