# dyllonj.com

> Personal site for Dyllon Johnson: research, writing, and systems work on language models, AI agents, personality evaluation, multi-agent behavior, and AI GTM systems.

## Primary entity

- Name: Dyllon Johnson
- Site: https://dyllonj.com/
- GitHub: https://github.com/dyllonj
- General contact: hello@dyllonj.com
- Research contact: research@dyllonj.com

## Built projects and code

- [Flick](https://www.joinflick.co): Source-grounded account research, change detection, and outbound play generation for revenue teams.
- [Lindr](https://github.com/Lindr-ai/lindr): Open-source platform for monitoring and evaluating LLM personality, tone, and behavioral drift.
- [Darkfield SDK](https://github.com/darkfield-ai/darkfield-sdk): Command-line and Python SDK for agentic web application security testing.
- [introspection-probes-sim](https://github.com/dyllonj/introspection-probes-sim): Evaluation toolkit for probing causal concept representations in open-weight decoder LLMs.
- [persona-society-sim](https://github.com/dyllonj/persona-society-sim): Social town simulator for activation-steered LLM agents.
- [running-coach-harness](https://github.com/dyllonj/running-coach-harness): Locally hosted agentic running coach connected to Garmin health data.

## Research pages

- [Measuring LLM Personality: GPT-5.2 vs Claude Opus 4.5](https://dyllonj.com/writing/llm-personality-benchmark.html): 4,368 personality evaluations comparing frontier models across personality dimensions. Published March 2025.
- [Cross-Vendor Personality Comparison: Grok, GPT-5.2, Claude Opus 4.5](https://dyllonj.com/writing/cross-vendor-personality.html): 9,325 evaluations across xAI, OpenAI, and Anthropic. Published July 2025.
- [COSER: Steering Vectors Override Fine-Tuning in Strategic Games](https://dyllonj.com/writing/coser-preliminary-results.html): Preliminary results on personality-steering vectors and strategic behavior in role-playing AI agents.

## Essays

- [The Convergent Mind](https://dyllonj.com/writing/convergent-mind.html): Essay on multi-agent orchestration, collective identity formation, and preserving diversity in AI agent ensembles.
- [Steering Superintelligence: Persona Vectors as Control Surfaces](https://dyllonj.com/writing/steering-superintelligence.html): Essay on persona vectors as control surfaces for advanced AI systems.

## Crawl policy

- Canonical domain: https://dyllonj.com/
- Sitemap: https://dyllonj.com/sitemap.xml
- Preferred summary file for LLMs: https://dyllonj.com/llms.txt