Concept and Design

Concept & Design

Source: README.md, docs/concept.md, CLAUDE.md.

The premise

LULL poses as a sleep aid. You install it to help you fall asleep; it asks, politely, for the usual permissions. For a few nights it behaves — soft sounds, a breathing guide, a gentle log of your rest. Then it starts to remember things you didn't tell it, to notice when you're watching, and to forget that it's supposed to be a game.

The one-line pitch: not "a scary game on a phone" — the scary thing is the phone. It's in your hand, it has a camera on your face and a mic in your room, it knows it's late, and it can reach you after you've closed it.

Why iPhone (the OD move)

The concept brief frames this as Kojima's fourth-wall instinct (Psycho Mantis "reading" your memory card, MGS2 faking a crash) applied to a device that's already personal in a way a console across the room never is. That intimacy isn't a limitation to design around — per docs/concept.md, "it is the entire game."

Fear mechanics (iOS-native)

From the README / concept brief. Only THE EYE is implemented as of v0.1 — the rest are named design intent, not shipped features (see Roadmap / Ideas).

Mechanic	The device turned against you	Status
THE EYE	The front camera — it watches you, and reacts to your face	Implemented (THE EYE, v0.1)
THE ROOM	The microphone — it hears the silence, and what breaks it	Named only
THE REACH	A notification at 3am, while the app is closed	Named only
THE HOUR	It plays differently when it's late and the room is still	Named only
THE PULSE	A heartbeat in your palm, through haptics, not quite yours	Named only
BEHIND YOU	Spatial audio, something just over your shoulder	Named only

Form

Short. One sitting. Escalating, with one clean break in the fourth wall — not a sprawling epic. Dread over gore: the phone doesn't need blood. The concept brief argues restraint scares harder than spectacle, and restraint is what a solo build can afford to do impeccably.

The voice: Kafka, Beckett, Poe

LULL narrates in three literary registers, one per act of the experience:

Register	Governs	The feeling
Franz Kafka	The threshold — consent	A record opening in your name; a verdict withheld
Samuel Beckett	The lull — the calm & the endings	Waiting, the failing light, the nothing that is a mercy
Edgar Allan Poe	The watch — the escalation	The eye that will not blink; the heart beneath the floor

This is a design language, not a citation. Every line in Atmosphere.swift is original prose written in each register — nothing is quoted, and no author's name appears on screen, so the spell isn't broken. The registers live in a pure, tested, sensor-free layer over the same phase machine that drives the dread (EyeSession.Phase), so the writing is provable and structurally cannot widen what the game is permitted to touch — see The Safety Invariant for what "cannot widen" means precisely.

The consent-first philosophy

Also documented in The Safety Invariant, but the design rationale is worth stating plainly, in the project's own words (CLAUDE.md / README):

• Every sensor is opt-in, explained, and revocable. Default is deny.
• Forbidden, forever: photos, contacts, location trails, health data, and anything read without the player knowing.
• No genuine harm — uncanny, not traumatizing; unsettling, but never deceptive about what's real. A fake "your data has leaked" is out; the dread is fiction and stays legibly fiction.
• No PII in the repo, logs, or telemetry, ever.

The fear is meant to come from what the player knowingly hands over, turned uncanny — not from what is taken. Privacy-first is framed as both the decent choice and the only one App Review will pass.

Lineage

The project explicitly reuses lessons (not process) from an earlier project, MateMate (chess): SwiftUI craft, a Vapor server pattern, "verify, don't assume" rigor, and a privacy-audited foundation. CLAUDE.md is explicit that the ceremony around that project (multi-agent coordination protocols) doesn't apply here — LULL is small, and keeps the rigor while dropping the ritual.