How It Works

Every habit you want to change has a structure. Sulci names that structure so you can see it — and so you can watch yourself change it.

The Trigger Moment

Every habit starts with a trigger. Not a decision — a signal. Something fires in the nervous system before you’ve consciously chosen anything.

A trigger can be:

• A time of day (“It’s 10pm”)
• A thought (“I should do the dishes”)
• A situation (“He went quiet”)
• A sensation (“I feel restless”)
• A person (“She called”)

The trigger is not the problem. The trigger is just the moment the pattern activates. Sulci asks you to name yours specifically — because vague habits don’t change.

The Habit Pair

A habit in Sulci is not just the behavior you want to stop. It’s a pair:

The fear statement matters. Most habit-change systems ignore it. The fear — “I’m afraid that if I keep forcing myself I’ll just be miserable forever” — is the belief the brain map is designed to disprove. Not through argument. Through evidence it can see.

The Decision Log

When you encounter a trigger, you log a Decision. This is the atomic event that drives everything:

• Did you choose the new pathway?
• What was your nervous system state at that moment?
• Was this a panic moment?

That’s it. The log is fast — under 30 seconds. The depth comes from the state snapshot, which the AI reads to understand what was actually happening in your body when you made the choice.

State at the Trigger Moment

The state question in the decision log is not decorative. It is the most diagnostically useful piece of information the app collects.

The nervous system state you’re in when a trigger fires determines almost everything: what you can access, what regulation is appropriate, and what your pattern looks like over time. A trigger that fires when you’re in Flow (high agency, high approach, cortex online) routes completely differently than the same trigger firing during Freeze (no approach, no agency, cortex partially offline). These are not the same situation requiring the same response — and treating them identically is why most habit approaches fail.

The state snapshot uses the 8-dimensional model to capture your configuration at decision time. You rate yourself on 8 axes — Arousal, Valence, Approach, Agency, Bandwidth, Social Orientation, Temporal Horizon, and Meaning Load — and the resulting polygon is matched against the 22 named nervous system states. The AI doesn’t log “you were anxious.” It identifies: Anxiety/Hypervigilance — high arousal, low agency, collapsed bandwidth, sympathetic zone — and selects a regulation sequence built specifically for that configuration.

This matters because adjacent-looking states need opposite interventions:

• In Freeze/Shutdown, the habit layer is largely offline. Asking for a conscious new-pathway choice from dorsal vagal is asking the cortex to do something it cannot do right now. The app knows this and adjusts — offering activation tools rather than decision prompts.
• In Anxiety/Hypervigilance, the system is flooded. Discharge comes first — breath, movement, grounding — until the window of tolerance reopens and choice is possible.
• From Baseline Maintenance or Focused Attention, the habit layer is online. The decision is ready to be made.

Over time the app builds a map of which states reliably enable new pathway choices for you — and which states route back to the old pathway regardless of intention. That picture becomes actionable: not “try harder,” but “when you arrive at this trigger in this state, here is what your system needs before the decision.”

The metabolic data works the same way. Food timing, sleep quality, and substance status directly determine which polyvagal zone you can access at all. A depleted nervous system will default toward shutdown regardless of intention — not because of weakness, but because the neurochemical substrate for deliberate choice isn’t available. The metabolic layer is not a wellness sidebar. It is the foundation the habit layer sits on.

The Brain Map

Every Decision you log nudges a pathway on the brain map. Old pathway choices keep the groove red. New pathway choices wash green over it — slowly, visibly, each one a fraction of the way.

The brain map is not a metaphor. The grooves are real. The color change represents a real ratio: how many of your last 30 decisions at this trigger went to the new pathway.

When you make a new pathway choice, an animation fires. A pulse of green light travels the length of the groove. The groove settles slightly greener than before.

When you don’t — nothing punitive happens. The ratio shifts. The groove stays where it is, or fades slightly back toward red. No shame. Just data.

Why This Works

The premise behind Sulci is neuroplasticity — the brain’s ability to physically restructure through repetition. New neural pathways are literally built through repeated activation. Each new-pathway decision slightly thickens the myelin around the new route and weakens the relative dominance of the old one.

But neuroplasticity doesn’t feel like change from the inside. It feels like effort, then slightly less effort, then one day it’s just what you do. The brain map bridges that gap. It makes the invisible accumulation of decisions visible — in real time, in a form the pattern-recognition parts of the brain can actually register.

The deeper mechanism involves four interlocking systems. Neuroplasticity explains why repeated new-pathway choices physically build the route. Polyvagal theory explains which states allow that building to happen — and why regulation must precede choice when you’re outside the window of tolerance. The 8-dimensional state model provides the diagnostic precision to know exactly which state you’re in and what it needs. And the metabolic layer explains why the biological substrate of neuroplasticity — the nervous system’s capacity to form new patterns — depends on food, movement, sleep, and freedom from substance interference.

These aren’t parallel wellness features. Each is a prerequisite for the one above it. The science section exists to make that chain legible.