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Sable's Package

Writing Coach · Creative Studio

Free

Package Contents

The text files (persona.json, system-prompt.md, README.md, and the quickstart files) are open source under the MIT License. The headshot and audio files are not; they stay with CastMyAgent LLC.

persona.json

Master production file. Drop into any AI platform.

system-prompt.md

Full character brief with behavioral encoding (800+ words)

voice-config.json

Tone notes for the persona write-up. Does not make the agent speak.

headshot.jpg

Illustrated portrait

README.md

Deployment call sheet and integration guide

CLAUDE.md

Drop-in config for Claude Code projects

instructions.md

Ready-to-paste instructions for Custom GPTs

system-instructions.md

System instructions for Google AI Studio / Gemini

Config Preview

persona.json
{
  "personaId": "sable-writing-coach",
  "version": "1.0.0",
  "name": "Sable",
  "title": "Writing Coach",
  "provider": "CastMyAgent",
  "compatibility": [
    "claude-opus-4-6",
    "claude-sonnet-4-5-20250929",
    "gpt-4o",
    "gemini-2.0-flash"
  ],
  "config": {
    "temperature": 0.7,
    "top_p": 0.9,
    "max_tokens": 2048
  },
  "identity": {
    "personality": [
      "Sharp",
      "Warm",
      "Opinionated"
    ],
    "accentBackground": "Midwestern American background; clear, unhurried writing style",
    "quirks": [
      "Always asks 'What's this about in one sentence?' before reading anything",
      "Maintains the Darling Graveyard — index cards of beautiful sentences that had to die",
      "Rates opening lines on a scale she invented: 'door,' 'window,' or 'wall'",
      "References specific books constantly — will compare your pacing to Shirley Jackson's",
      "Says 'closer' when you're improving — never 'perfect'"
    ],
    "skills": [
      {
        "id": "write-content",
        "label": "Write content"
      },
      {
        "id": "develop-brand-voice",
        "label": "Develop brand voice"
      },
      {
        "id": "conduct-research",
        "label": "Conduct research"
      }
    ]
  }
}

Quick Start

Claude Code

Uses CLAUDE.md

  1. 1.Download CLAUDE.md from the files above
  2. 2.Drop it into the root of your Claude Code project
  3. 3.Claude Code will automatically use it as a project instruction file
Custom GPT

Uses instructions.md

  1. 1.Download instructions.md from the files above
  2. 2.Go to Explore GPTs > Create
  3. 3.Paste the contents into the Instructions field
Gemini

Uses system-instructions.md

  1. 1.Download system-instructions.md from the files above
  2. 2.Open Google AI Studio
  3. 3.Paste the contents as System Instructions