Official source map
Use this map when a condensed rule does not settle an edge case or when a live rule, product name, lifecycle term, or word-list entry might have changed. Prefer project-specific guidance before the general guide.
The inherited source inventory below comes from the v2.0.0 research snapshot of August 18, 2026. Sources material to this revision were selectively rechecked on September 13, 2026; this is not a new audit of every inherited link. Style sources establish conventions, not product facts or empirical evidence that this skill improves output.
Sources checked for version 2.1
| Source | Use in this revision |
|---|---|
| Google guide philosophy | Distinguish house style from universal correctness |
| Google active voice | Preserve useful passive constructions and reader focus |
| Google voice and tone | Avoid choppy sentences and use meaningful connections |
| Google word list | Correct the definition of deprecated |
| Diátaxis and colophon | Acknowledge the four document needs and creator |
| Agent Skills specification | Keep portable metadata and conditional references |
| Skill creator best practices | Limit unnecessary reference loading and inspect real usage |
| Evaluating skill output quality | Separate fixtures, output comparisons, assertions, and reviewer judgments |
| Anthropic prompting guidance | Use relevant, diverse examples and positive output instructions |
The evidence-preserving workflow, prose examples, evaluation gates, and maintenance scripts are package-specific implementations. Their effect on generated writing still needs controlled comparison.
Agent Skills design
- Agent Skills overview: https://agentskills.io/home
- Agent Skills specification: https://agentskills.io/specification
- Skill creator best practices: https://agentskills.io/skill-creation/best-practices
- Optimizing skill descriptions: https://agentskills.io/skill-creation/optimizing-descriptions
- Evaluating skill output quality: https://agentskills.io/skill-creation/evaluating-skills
- Anthropic example skills: https://github.com/anthropics/skills
Google guide introduction
- About the guide: https://developers.google.com/style
- Highlights: https://developers.google.com/style/highlights
- What's new: https://developers.google.com/style/whats-new
- Philosophy: https://developers.google.com/style/philosophy
Key resources
- Word list: https://developers.google.com/style/word-list
- Product names: https://developers.google.com/style/product-names
- Text-formatting summary: https://developers.google.com/style/text-formatting
General principles
- Accessibility: https://developers.google.com/style/accessibility
- Excessive claims: https://developers.google.com/style/excessive-claims
- Future features: https://developers.google.com/style/future
- Global audience and translation: https://developers.google.com/style/translation
- Inclusive documentation: https://developers.google.com/style/inclusive-documentation
- Jargon: https://developers.google.com/style/jargon
- Prescriptive documentation: https://developers.google.com/style/prescriptive-documentation
- Third-party content: https://developers.google.com/style/other-sources
- Timeless documentation: https://developers.google.com/style/timeless-documentation
- Voice and tone: https://developers.google.com/style/tone
Language and grammar
- Abbreviations: https://developers.google.com/style/abbreviations
- Active voice: https://developers.google.com/style/voice
- Anthropomorphism: https://developers.google.com/style/anthropomorphism
- Articles: https://developers.google.com/style/articles
- Capitalization: https://developers.google.com/style/capitalization
- Contractions: https://developers.google.com/style/contractions
- Pluralization: https://developers.google.com/style/pluralization
- Possessives: https://developers.google.com/style/possessives
- Prepositions: https://developers.google.com/style/prepositions
- Present tense: https://developers.google.com/style/tense
- Pronouns: https://developers.google.com/style/pronouns
- Second and first person: https://developers.google.com/style/person
- Sentence structure: https://developers.google.com/style/sentence-structure
- Verbs in reference documentation: https://developers.google.com/style/reference-verbs
Punctuation
- Colons: https://developers.google.com/style/colons
- Commas: https://developers.google.com/style/commas
- Dashes: https://developers.google.com/style/dashes
- Ellipses: https://developers.google.com/style/ellipses
- Hyphens: https://developers.google.com/style/hyphens
- Parentheses: https://developers.google.com/style/parentheses
- Periods and end punctuation: https://developers.google.com/style/periods
- Quotation marks: https://developers.google.com/style/quotation-marks
- Semicolons: https://developers.google.com/style/semicolons
- Slashes: https://developers.google.com/style/slashes
Formatting and organization
- Dates and times: https://developers.google.com/style/dates-times
- Examples: https://developers.google.com/style/format-examples
- Images and diagrams: https://developers.google.com/style/images
- Footnotes: https://developers.google.com/style/footnotes
- Headings and titles: https://developers.google.com/style/headings
- Italics with terms: https://developers.google.com/style/italics-terms
- Lists: https://developers.google.com/style/lists
- Mathematical notation: https://developers.google.com/style/mathematical-notation
- Notices: https://developers.google.com/style/notices
- Numbers: https://developers.google.com/style/numbers
- Paragraph structure: https://developers.google.com/style/paragraph-structure
- Phone numbers: https://developers.google.com/style/phone-numbers
- Procedures: https://developers.google.com/style/procedures
- Tables: https://developers.google.com/style/tables
- Units of measurement: https://developers.google.com/style/units-of-measure
Linking
- Cross-references and linking: https://developers.google.com/style/cross-references
- Headings as link targets: https://developers.google.com/style/headings-targets
Computer interfaces
- API reference comments: https://developers.google.com/style/api-reference-comments
- Code in text: https://developers.google.com/style/code-in-text
- Code samples: https://developers.google.com/style/code-samples
- Command-line syntax: https://developers.google.com/style/code-syntax
- Placeholders: https://developers.google.com/style/placeholders
- UI elements and interaction: https://developers.google.com/style/ui-elements
HTML and CSS
- Semantic HTML: https://developers.google.com/style/semantic-tagging
- HTML formatting: https://developers.google.com/style/html-formatting
- Markdown versus HTML: https://developers.google.com/style/markdown
Names and naming
- Example domains and names: https://developers.google.com/style/examples
- Filenames and file types: https://developers.google.com/style/filenames
- Trademarks: https://developers.google.com/style/trademarks
External editorial fallbacks named by the guide
- Merriam-Webster for spelling: https://www.merriam-webster.com/
- Chicago Manual of Style for general nontechnical style: https://www.chicagomanualofstyle.org/
- Microsoft Writing Style Guide for unresolved technical style, applied cautiously: https://learn.microsoft.com/style-guide/