psygen-llm 0.3.0

LLM-chained psychological profile generator for fictional characters (Psygen revised).

psygen-llm

Python package implementing Psygen Revised: a three-stage (optional fourth) LLM pipeline that produces a structured psychological profile for a character from a natural-language query.

• Schema: JSON Schema for each layer and the merged profile (package data).
• Runner: ProfileGenerator chains axiom → intermediate → emergent calls, validates JSON, merges evidence.
• Prompt surface: to_prompt_string() emits dialogue-ready text (20 emergent traits + coping style + role identity), capped at 600 characters per the design contract.

Install and publish (uv)

Requires uv and Python 3.10+ (see requires-python in pyproject.toml). PyPI name psygen-llm, import psygen_llm, CLI psygen-llm.

For publishing, the path is: build with uv, publish the artifacts. For using the package from PyPI, install into a local virtual environment (for example uv venv then activate the .venv, or use whatever venv your project already uses) — not system-wide Python.

From the repository root, bump version in pyproject.toml when publishing a new release, and configure PyPI credentials for Twine (for example ~/.pypirc or the usual TWINE_* environment variables).

Install dev mode

uv pip install -e .

Build and push (maintainers):

uv build
uvx twine upload dist/*

Install into the active venv (after the release is on PyPI; with that environment selected — no --system):

uv pip install "psygen-llm"

Use uv pip install "psygen-llm[openai]" for the optional OpenAI dependency. To remove: uv pip uninstall psygen-llm (it is fine if nothing is installed). Quote extras so the shell does not treat [openai] as a glob.

OpenAI config

Create a JSON file (e.g. psygen.json, keep it private — chmod 600 — and do not commit it):

{
  "openai": {
    "api_key": "sk-...",
    "model": "gpt-4o-mini",
    "base_url": null
  }
}

openai.api_key and openai.model are required. openai.base_url is optional; omit it or set it to null for the default OpenAI API URL.

Quick use

import asyncio
from psygen_llm import ProfileGenerator, OpenAiLlmClient

async def main():
    client = OpenAiLlmClient.from_config_file("psygen.json")
    gen = ProfileGenerator(client)
    profile = await gen.generate("Linus from Stardew Valley")
    print(profile.to_prompt_string())
    print(profile.to_json())

asyncio.run(main())

Custom LLM backend

Implement psygen_llm.protocols.LlmClient (complete(system, user) -> str) and pass it to ProfileGenerator.

CLI

By default the merged profile JSON is written to output/<slug>.json (slug derived from your query; the output/ directory is created if needed). Use -o for another path, or -o - to print JSON to stdout.

psygen-llm --config psygen.json "Linus from Stardew Valley"
psygen-llm --config psygen.json "Linus from Stardew Valley" -o /tmp/linus.json
psygen-llm --config psygen.json "Linus from Stardew Valley" -o -

Design

See DESIGN.md and PLAN.md in this directory.

License

MIT