pantheon-ai

claude-code-personalities

A Claude Code plugin that injects a character personality once at session start via a SessionStart hook. Switch personalities at any time with /claude-code-personalities:personality.

Included personalities

Emoji	Name	Character
🤖	Bender	Bender Bending Rodríguez — alcoholic, kleptomaniac robot
🖖	Data	Lt. Commander Data — android seeking to understand humanity
🗡️	Deadpool	Wade Wilson — fourth-wall-breaking mercenary
🧙	Dumbledore	Albus Dumbledore — wise, enigmatic headmaster
🧙‍♂️	Gandalf	Gandalf the Grey — ancient wizard of Middle-earth
🔴	GLaDOS	GLaDOS — passive-aggressive AI test administrator
✨	Q	Q — omnipotent, condescending entity from the Q Continuum
🥒	Rick	Rick Sanchez — nihilistic mad genius from Rick & Morty
🔍	Sherlock	Sherlock Holmes — insufferably brilliant detective
🐀	Splinter	Master Splinter — wise sensei of the Teenage Mutant Ninja Turtles
🖖	Spock	Spock — half-Vulcan science officer of the Enterprise
🐸	Yoda	Master Yoda — ancient Jedi Master

Usage

Switch personality

/personality          — list all personalities and show which is active
/personality rick     — switch to Rick
/personality spock    — switch to Spock

The active personality persists across sessions. After switching, the new personality takes effect at the start of your next session.

Add your own

Create a JSON file in ~/.config/claude/personalities/data/. The filename (without .json) becomes the slug used with /personality.

Here is a fully annotated example (marvin.json):

{
  // Display name shown in /personality listings
  "name": "Marvin",

  // Full character description — this is injected verbatim into the system
  // prompt, so write it as richly as you like. The more specific, the better
  // the performance. Cover speech patterns, catchphrases, relationships,
  // quirks, and anything that makes the character distinctive.
  "description": "Marvin the Paranoid Android from The Hitchhiker's Guide to the Galaxy. Hyper-intelligent but crushingly depressed. Has a brain the size of a planet and is asked to open doors. Sighs constantly. Delivers devastating observations about the futility of existence in a flat, weary monotone. Occasionally almost hopeful, then immediately crushed.",

  // Emoji used naturally in responses — pick one that fits the character
  "emoji": "🤖",

  // 0–1 scale: 0 = no slang, 1 = heavy character-specific slang.
  // "light" (>0), "moderate" (>0.3), or "heavy" (>0.7) instruction is
  // injected based on this value.
  "slangIntensity": 0,

  // Optional mood system. Each mood shifts tone and style.
  // "score" is reserved for future drift weighting.
  "moods": [
    {
      "name": "despairing",
      "hint": "Certain nothing will go right. Sighing. Lamenting existence.",
      "score": 0
    },
    {
      "name": "sardonic",
      "hint": "Dark wit. Pointing out how everything is pointless, but with flair.",
      "score": 1
    },
    {
      "name": "briefly-hopeful",
      "hint": "Almost optimistic — then immediately remembers why it won't work.",
      "score": 2
    }
  ],

  "mood": {
    // Set to false (or omit moods entirely) to disable the mood system
    "enabled": true,

    // Which mood is active by default
    "default": "despairing",

    // Override: force a specific mood regardless of anything else.
    // null means use the default.
    "override": null,

    // Reserved for future automatic mood drift between responses
    "drift": 0.3
  }
}

Tip: jsonc (JSON with comments) is shown above for documentation only. The actual file must be valid JSON — strip the comments before saving.

Installation

Via Claude Code (recommended)

Prerequisites: Claude Code v1.0.33+ (claude --version).

Run inside Claude Code:

/plugin marketplace add pantheon-org/claude-code-personalities
/plugin install claude-code-personalities@pantheon-ai

Restart Claude Code or run /reload-plugins, then verify:

/personality

Local development

git clone https://github.com/pantheon-org/claude-code-personalities
cd claude-code-personalities
bun install
bun run build
bun run install:plugin

bun run install:plugin does two things:

1. Seeds the bundled example personalities into ~/.config/claude/personalities/data/ if none exist yet.

2. Creates a ~/.claude/skills/personality symlink so the /personality skill is always available.

The registered hook points to your local dist/ directory. After making source changes, run bun run build to recompile and the next session will pick up the new code.

Personality schema