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Slashy’s AI writes emails that sound like you by learning from your email history, explicit preferences, and draft feedback. You can accelerate this by telling the agent exactly how you want it to write.
The fastest way to train the agent: set 3-5 writing memories on day one, then actively edit AI drafts for the first week. Most users see accurate drafts by day 7.

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Setting Writing Memories

Open the agent sidebar (p a) and tell it your preferences:
  • “Remember: I write short, direct emails. Never use ‘I hope this finds you well.’ Keep it under 3 sentences.”
  • “Remember: I sign off with just my first name, no ‘Best’ or ‘Regards.’”
  • “Remember: formal tone for investors, casual for my team.”
  • “Remember: never use exclamation marks.”
Manage all memories in Settings > Memories (Cmd+,).
Agent sidebar showing writing style memories and preferences

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Memory Types

TypeWhat It DoesExample
About MeRules for all emails”I prefer bullet points over paragraphs”
About EntityPer-contact/company rules”When emailing Sequoia, always CC sarah@mycompany.com”
Activity-anchoredRules for specific activities”When scheduling, offer 3 time slots and include my Zoom link”
The agent retrieves the right memories based on context automatically.

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Persona Detection

During setup, Slashy analyzes your sent emails to detect your persona, greeting style, and signature. Edit these anytime in Settings > Account.
Persona detection settings showing auto-detected communication style

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Training by Deleting Bad Drafts

Every dismissed draft teaches the agent what not to do. Every edit before sending teaches it what you prefer. The learning is context-specific — editing a sales reply improves sales drafts, not meeting confirmations. First week advice: Actively dismiss bad drafts and edit acceptable ones. Most users see significant improvement within 10-15 interactions.

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Direct Feedback

Beyond deleting drafts, give feedback through the sidebar:
  • “That last draft was too formal. I talk to Mike like a friend.”
  • “When I reply to support tickets, use bullet points and be concise.”

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Per-Contact Preferences

  • “Remember: when emailing anyone @bigclient.com, use a formal tone with my full signature.”
  • “Remember: Mike prefers short emails. Keep replies under 2 sentences.”

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Choosing Your AI Model

ModelBest ForSpeed
HaikuQuick replies, simple emailsFastest
SonnetMost emails (default)Fast
OpusComplex, nuanced writingSlower, highest quality
Switch models using the selector in the compose window or agent sidebar.

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Bring Your Own API Key

Use Opus without limits by providing your own Anthropic API key:
1

Open Account settings

Go to Settings > Account (Cmd+,)
2

Paste your API key

Enter your Anthropic API key in the API Key field.
3

Confirm encryption

The key is encrypted and stored in Vault. You can remove it anytime.
Opus usage with your own API key bills to your Anthropic account. Haiku and Sonnet remain included with your Slashy subscription.

How AI Drafts Work

Auto-suggestions and learning

AI Memories

How memories power personalization

10 Automations

Set up impactful automations

Signatures

Configure signatures and remove branding