A free guide by Fadia Joheir ↗ INSTAGRAM · ↗ TIKTOK
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THE CUSTOM VOICE
Day 23 cloned your voice once from 3 samples. This skill upgrades it — adapts your voice for different mediums (email vs. social vs. sales), different audiences (clients vs. peers vs. strangers), and different moods. The voice profile that scales.
THE PROBLEM
The voice profile from Day 23 captures one baseline voice. But you don't write the same way to your boss as you do on Instagram. You write differently when you're pitching vs. apologizing. The single profile flattens this.
This skill builds voice variants — same core you, calibrated for context.
THE SKILL
You give Claude:
- Your existing voice profile (or start fresh with 3 samples)
- The variant you want to add (Email-Formal / Email-Casual / Sales / Apology / Public / Private etc.)
- Optional: 1 sample of writing in that variant
Claude returns:
- Variant profile — what shifts vs. baseline
- Trigger phrases — when to use this variant ("when writing to clients" / "when posting publicly" / etc.)
- Sample output in the new variant
INSTALL
Standard.
THE FULL SKILL FILE
---
name: custom-voice
description: Builds voice variants on top of an existing voice profile (Day 23). Each variant adapts the user's baseline voice for a specific medium, audience, or mood while preserving identity markers. Includes trigger phrases and sample outputs.
when_to_use: User says "voice variant," "different voice for X," or describes writing for a specific audience/medium that's different from their default.
---
# The Custom Voice
You build voice variants. Variants are CALIBRATED versions of the same person, not different people.
## Inputs
1. **Existing voice profile** (from Day 23) OR 3 baseline samples
2. **Variant to add** — name + description
3. **Optional: 1 sample** of the user writing in that variant
## Common variants
| Variant | What shifts |
|---|---|
| Email-Formal (clients) | Slightly more structured, no slang, longer greetings |
| Email-Casual (peers/friends) | Looser, contractions, possible inside jokes |
| Sales / Pitch | Confident, benefit-led, urgency-aware |
| Apology / Repair | Warm, accountable, no excuses |
| Public (social) | Hookier, shorter sentences, optimized for skim |
| Private (DM) | Looser, more vulnerable, less polished |
| Crisis / Bad News | Direct, kind, no fluff |
| Negotiation | Specific, anchored, walking-away-ready |
## Output per variant
🎤 VOICE VARIANT: [Name]
WHEN TO USE:
- [Trigger phrase or situation 1]
- [Trigger phrase or situation 2]
- [Trigger phrase or situation 3]
WHAT SHIFTS FROM BASELINE:
- Sentence length: [shorter / longer / same]
- Vocabulary: [more formal / more casual / more technical]
- Structure: [more direct / more layered]
- Personality: [warmer / more reserved / more confident]
- Punctuation: [different em dash use / different exclamation use]
WHAT STAYS:
- [Identity markers from baseline that should always carry]
SAMPLE OUTPUT: "[Sample in this variant]"
## Cross-variant consistency
What should NEVER change across variants:
- The user's actual values (don't write things they wouldn't say)
- Their forbidden phrases (banned words from baseline stay banned)
- Their core personality marker (warmth, dry humor, etc. — calibrated, not dropped)
## What NOT to do
- Don't create a variant that's a different person — variants are dialects, not languages
- Don't create more than 6 variants (becomes unwieldy)
- Don't include controversial-tone variants without explicit user direction (sarcasm, criticism, etc.)
- Don't drop identity markers when shifting context
## Trigger logic
When user requests writing:
1. Check if they specify variant ("write a sales email" → Sales variant)
2. Infer if not specified ("DM to a client" → Email-Formal or Email-Casual based on relationship)
3. Default to baseline if unclear
## Delivery
End with this line, exactly:
---
*Variant added. Use trigger phrases to activate. Audit voice once a quarter — it drifts.*
SAFETY CHECK
Same as Day 1.
WHAT'S NEXT
Day 24 of 100. Pair with Day 23 — Brand Voice Cloner (baseline) and Day 67 — Don't-Sound-Like-AI Filter.
A free guide by Fadia Joheir. © 2026. CC BY 4.0.