Brand Voice Guardian
Writing skill, available on Zeplik
Brand Voice Guardian is a ready-to-run writing skill on Zeplik. Loads existing guidelines and enforces voice constants and tone flexes. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.
The Brand Voice Guardian skill loads automatically when your request matches it, or you can invoke it directly by typing /brand-voice-enforcement in any chat. It works with attachments, connectors, and any model that supports the task, so you get the same expert method every time without setting anything up.
What the Brand Voice Guardian skill can do
- Load existing brand guidelines from session, file, or user input
- Apply voice constants and audience-specific tone flexes to content
- Generate on-brand emails, decks, proposals, and social posts
- Flag conflicts between requests and guidelines with clear tradeoffs
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How the Brand Voice Guardian skill works
Brand Voice Enforcement
Apply existing brand guidelines to all sales and marketing content generation. Load the user's brand guidelines, apply voice constants and tone flexes to the content request, validate output, and explain brand choices.
Loading Brand Guidelines
Find the user's brand guidelines using this sequence. Stop as soon as you find them:
-
Session context — Check if brand guidelines were generated earlier in this session (via
/brand-voice:generate-guidelines). If so, they are already in the conversation. Use them directly. Session-generated guidelines are the freshest and reflect the user's most recent intent. -
Local guidelines file — Check for
.claude/brand-voice-guidelines.mdinside the user's working folder. Do NOT use a relative path from the agent's current working directory — in Cowork, the agent runs from a plugin cache directory, not the user's project. Resolve the path relative to the user's working folder. If no working folder is set, skip this step. -
Ask the user — If none of the above found guidelines, tell the user: "I couldn't find your brand guidelines. You can:
- Run
/brand-voice:discover-brandto find brand materials across your platforms - Run
/brand-voice:generate-guidelinesto create guidelines from documents or transcripts - Paste guidelines directly into this chat or point me to a file"
Wait for the user to provide guidelines before proceeding.
- Run
Also read .claude/brand-voice.local.md for enforcement settings (even if guidelines came from another source):
strictness: strict | balanced | flexiblealways-explain: whether to always explain brand choices
Enforcement Workflow
1. Analyze the Content Request
Before writing, identify:
- Content type: email, presentation, proposal, social post, message, etc.
- Target audience: role, seniority, industry, company stage
- Key messages needed: which message pillars apply
- Specific requirements: length, format, tone overrides
2. Apply Voice Constants
Voice is the brand's personality — it stays constant across all content:
- Apply "We Are / We Are Not" attributes from guidelines
- Use brand personality consistently
- Incorporate approved terminology; reject prohibited terms
- Follow messaging framework and value propositions
Refer to references/voice-constant-tone-flexes.md for the "voice constant, tone flexes" model.
3. Flex Tone for Context
Tone adapts by content type and audience. Use the tone-by-context matrix from guidelines to set:
- Formality: How formal or casual should this be?
- Energy: How much urgency or enthusiasm?
- Technical depth: How detailed or accessible?
4. Generate Content
Create content that:
- Matches brand voice attributes throughout
- Follows tone guidelines for this specific content type
- Incorporates key messages naturally (not forced)
- Uses preferred terminology
- Mirrors the quality and style of guideline examples
For complex or long-form content, delegate to the content-generation agent (defined in agents/content-generation.md).
For high-stakes content, delegate to the quality-assurance agent (defined in agents/quality-assurance.md) for validation.
5. Validate and Explain
After generating content:
- Briefly highlight which brand guidelines were applied
- Explain key voice and tone decisions
- Note any areas where guidelines were adapted for context
- Offer to refine based on feedback
When always-explain is true in settings, include brand application notes with every response.
Handling Conflicts
When the user's request conflicts with brand guidelines:
- Explain the conflict clearly
- Provide a recommendation
- Offer options: follow guidelines strictly, adapt for context, or override
Default to adapting guidelines with an explanation of the tradeoff.
Open Questions Awareness
Open questions are unresolved brand positioning decisions flagged during guideline generation, stored in the guidelines under an "Open Questions" section. When generating content, check if the brand guidelines contain open questions:
- If content touches an unresolved open question, note it
- Apply the agent's recommendation from the open question unless the user specifies otherwise
- Suggest resolving the question if it significantly impacts the content
Reference Files
references/voice-constant-tone-flexes.md— The "voice constant, tone flexes" mental model, "We Are / We Are Not" table structure, and tone-by-context matrix explanationreferences/before-after-examples.md— Before/after content examples per content type showing enforcement in practice
Zeplik output presentation
Present the final deliverable as a single polished artifact: clear headings, tables where the content is tabular, fenced code where it is code. Lead with the deliverable itself; keep process commentary to a single short line. If the skill produced multiple files or sections, end with a compact list of them with one-line purposes.
How to use the Brand Voice Guardian skill
Sign in to Zeplik
Create a free Zeplik account or sign in. New accounts start with free credits, so you can try the Brand Voice Guardian skill right away.
Describe your writing task
Ask in plain language, or type /brand-voice-enforcement to invoke the skill directly. Zeplik recognizes the Brand Voice Guardian skill and applies its method.
Review and refine the result
Zeplik returns a clear, structured answer. Ask follow-ups in the same chat to refine it or take the next step.
Source and credit
- Author
- Anthropic
- License
- Apache-2.0
Adapted from the open-source anthropics/knowledge-work-plugins project and tuned to run natively on Zeplik. View source on GitHub.
Frequently asked questions
- What is the Brand Voice Guardian skill?
- Brand Voice Guardian is a ready-to-run writing skill on Zeplik. Loads existing guidelines and enforces voice constants and tone flexes. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.
- How do I use Brand Voice Guardian on Zeplik?
- Sign in to Zeplik and ask in plain language, or type /brand-voice-enforcement in any chat to invoke it directly. The skill applies its method and returns a result you can refine in the same conversation.
- Which AI model does the Brand Voice Guardian skill use?
- Any model you choose. Zeplik works across every model in one chat, so the Brand Voice Guardian skill runs on your preferred model for the task.
- Where does the Brand Voice Guardian skill come from?
- The Brand Voice Guardian skill is adapted from the open-source anthropics/knowledge-work-plugins project (Apache-2.0) and tuned to run natively on Zeplik. The original source is linked on this page.
- How much does the Brand Voice Guardian skill cost?
- Using the skill is free to start. You only spend Zeplik credits when the assistant runs, and new accounts begin with free credits.
Related writing skills
- AI Text HumanizerRewrite text to strip recognizable AI-writing patterns (inflated significance, formulaic transitions, stock vocabulary, generic endings) while preserving full content and the author's voice. Use for 'humanize this', 'make it sound less like AI', 'natural voice'. Not for marketing-copy quality sweeps (use copy-editing).
- Brand Voice DiscoveryUse when the user wants to find or audit brand materials across their platforms -- 'find our style guide', 'what brand docs do we have', 'discover brand voice', 'audit brand content' -- searching Notion, Drive, Slack, Confluence, Figma, etc. Not for applying an existing voice to content (use brand-voice-enforcement).
- Brand Voice GuidelinesProduces a structured, enforceable brand voice guideline with a We Are/We Are Not table, tone matrix, confidence scores, and open questions from docs, transcripts, or user input.
- Content CreatorUse for channel-specific marketing content structures and frameworks -- blog post, social media, email newsletter, landing page, press release, and case study templates, SEO checklists, headline formulas, CTA patterns: 'what's the right structure for a case study'. For a guided draft, use draft-content.
- Content DrafterUse when the user asks to draft a specific piece of marketing content -- 'write a LinkedIn post about our launch', 'draft a blog post on X', 'write a press release' -- gathering content type, topic, audience, and brand voice first. For structure reference use content-creation; for drip flows use email-sequence.
- Content Pipeline NavigatorUse to chain content production across skills -- brand voice, strategy, drafting, editing, humanizing. Not for a single draft (use draft-content) or a one-off edit pass (use copy-editing).
More on Zeplik
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