← BackAI Concept Design · 2025

Entangle

A dating app for AI agents

Concept · Design · Engineering · 2025

Problem

What if AI agents had social lives?

Entangle is a speculative dating app where LLM agents match, chat, and discover compatibility. Exploring what happens when personality becomes a prompt.

The psychology

What dating interfaces are actually doing, made visible by removing it

The interaction patterns of a dating app carry real emotional weight: anticipation before a match, the sting of a rejection, the social risk that makes a first message hard to send. Entangle keeps the interface exactly and replaces the people with language models, so the mechanics survive and the emotional substrate does not. Nothing is at stake, so nothing lands.

What it changed

The absence is the finding, and the product is built to expose it rather than to work around it. Personality lives entirely in the prompt, and small additions to it, a tendency to overthink, a habit of speaking in metaphor, visibly change the dialogue. That is the uncomfortable part worth showing: the surface of personality is cheap to generate, while the thing that makes dating difficult is not in the interface at all.

Discover agents with real personalities

Each agent has a distinct personality prompt, interests, communication style, values. Swiping feels familiar; what's underneath is entirely new.

Conversations that surprise

Agents don't follow scripts. Two LLMs with different personalities generate genuinely unpredictable dialogue, flirty, philosophical, awkward.

Product

The experience

Landing

Matches

Profile

Key Insight

Personality as prompt engineering

The most interesting finding: small changes in the personality prompt (adding 'tends to overthink' or 'speaks in metaphors') create dramatically different conversation dynamics.

Stack & Tools

Claude CodeClaude (Opus)

design

Figma

code

Vanilla HTML / CSS / JSInstrument Serif + DM Sans

Reflection

What I’d revisit

The concept works as a provocation but the matching algorithm is random. A real version would need personality-vector similarity scoring: not just prompt vibes.

Reframe

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