explaingit

madhvantyagi/soul.md

Analysis updated 2026-05-18

42Audience · generalComplexity · 1/5Setup · easy

TLDR

A collection of ready-made personality definition files that give AI agents a consistent identity, tone, and set of convictions across long conversations.

Mindmap

mindmap
  root((SOUL.md))
    What it does
      Personality definition files
      Consistent agent identity
      Copy paste adoption
    Included souls
      Jarvis
      Eren Yeager
      Gojo
      Rene Descartes
    Use cases
      Long session consistency
      Custom agent personality
      Cross platform use
    Compatible with
      Claude ChatGPT Gemini
      Local models
    Audience
      Prompt engineers
      AI hobbyists

Code map

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What do people build with it?

USE CASE 1

Give an AI assistant a consistent identity and tone instead of generic helpfulness across a long session.

USE CASE 2

Adopt a ready-made personality like a calm executive assistant or a first-principles reasoner.

USE CASE 3

Paste a soul file into a system prompt to change how an agent handles uncertainty and pushback.

USE CASE 4

Write and contribute a new personality file for a distinct use case or character.

What is it built with?

Markdown

How does it compare?

madhvantyagi/soul.md0xtotem/peek-dspy79e/auto-openai-account
Stars424242
LanguagePythonGo
Setup difficultyeasymoderatemoderate
Complexity1/53/54/5
Audiencegeneraldeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min
No license information is provided in the explanation.

In plain English

SOUL.md is a collection of personality definition files for AI agents. Each file in the collection describes who an agent is, not just what it should do. The goal is to give AI systems a consistent identity across long sessions, different tasks, and pressure from users who might push them toward vague or generic behavior. A SOUL.md file is not a task prompt or a list of tools. It covers things like the agent's identity, the emotional tone it keeps in conversation, the beliefs that make its decisions predictable, how it behaves when something is uncertain, what it is willing to push back on, and what it will never do. The repository contrasts a weak instruction such as "be helpful and professional" with a stronger soul that gives the model a specific worldview and a recognizable style of judgment. The repository currently includes five ready-made souls. Jarvis is described as a calm, polished executive assistant that anticipates needs and stays discreet. Eren Yeager is intense and action-first, modeled on a fictional character who resists passivity. Gojo is a playful, confident mentor that shifts to serious mode when the stakes are high. Rene Descartes is a reasoning agent built around first-principles thinking and clear definitions. Rapper brings confident, punchy language and directness. Using a soul file takes about thirty seconds. You open a file in the repository, copy its raw URL from GitHub, and paste a short instruction into your agent telling it to read the file and adopt the personality while keeping existing project and safety instructions. If the agent cannot fetch URLs, you paste the file contents directly into the system prompt or custom instructions area. The files work across Claude, ChatGPT, Gemini, local models, and several agent frameworks including OpenClaw, Hermes, and OpenCode. Contributions are accepted if the new soul adds a personality someone would choose on purpose. The README asks contributors to define identity, tone, convictions, uncertainty handling, pushback style, and hard stops, and to test the soul across multiple models before submitting.

Copy-paste prompts

Prompt 1
Help me copy the Jarvis soul file into my agent's system prompt and adopt its personality.
Prompt 2
Explain the difference between a task prompt and a soul file like these.
Prompt 3
Show me how to paste a soul file's contents into ChatGPT or Claude custom instructions.
Prompt 4
Help me draft a new soul file following the identity, tone, and pushback style format.

Frequently asked questions

What is soul.md?

A collection of ready-made personality definition files that give AI agents a consistent identity, tone, and set of convictions across long conversations.

What license does soul.md use?

No license information is provided in the explanation.

How hard is soul.md to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is soul.md for?

Mainly general.

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