In my own words

Description and use

Automating a personal communication style for an AI agent using a style file and a PreToolUse hook, enabling the agent to generate messages that match the user’s voice without manual editing.

Problem

Automating consistent, personal communication style for an AI agent while preserving human ownership of content and responsibility.

Outcome

The user’s communication style is captured in a reusable skill file, enabling the AI agent to produce consistent, personalized messages automatically. The process requires initial manual effort but eliminates repetitive editing.

Workflow

• Gather two years of user messages, excluding bots and private content.
• Lay out twelve mixed cards and label each as "mine" or "not mine".
• Identify accepted and rejected patterns, extracting a common skeleton and rules.
• Create a style file (SKILL.md) with model sentence, skeleton, voice, never list, audience rules, and examples. Create SOURCES.md documenting rule origins and guesses.
• Rewrite three recent real messages using the new style, noting any corrections as missing rules.
• Implement a PreToolUse hook that blocks message sending until the style file is read. Maintain a decision table in git for traceability.

Evidence

The agent replies with generic, accurate but impersonal messages.

Source

The whole method rests on that: you don't ask yourself how you write. You lay cards on the table and look.

Source

A style file is context, not a constraint. In Claude Code a skill is picked up when the model recognises a matching situation from the skill's description, and sometimes it won't.

Source

Before it was saved, the file went through a test: three real situations from the previous days, rewritten in the new style. All three passed without a single correction.

Source