A'Tipik
Human keystroke rhythm for neuro-atypical fairness
- Author :
- Guillaume Desvaux · HOPE 'N MIND SASU
- Year :
- 2026
Abstract
A fully on-device Windows desktop tool that retypes text with a statistically human keystroke rhythm (Weibull, keyboard-layout aware). It never changes the words, only the rhythm, so behavioural biometrics do not mistake neuro-atypical people for bots. Optional on-device Textualiser: soften the tone of a message written in frustration, rephrase it, or even turn it into poetry. All offline.
Keywords
- Plasticity & critical periods
- Traceability & control
- Neuroscience & Neurodevelopment
- Cognition & theory of mind
- ADHD
- Neural networks & LLMs
- Language models
Full article
Restoring the right to be judged by what you write, not by how your hands type.
Same words. Only the rhythm changes.
Behavioural biometrics do not read your words, they read the gaps between your keystrokes. A’Tipik rewrites that rhythm so an atypical typing pattern is not mistaken for a bot.
A'Tipik is a fully on-device Windows desktop tool that retypes your text with a statistically human keystroke rhythm. It never changes your words, only the timing signature of the typing, so that behavioural-biometric systems (anti-bot scores, keystroke dynamics) do not silently flag neuro-atypical people (autism, ADHD, dyspraxia, giftedness, visual differences) as machines. An optional, fully on-device engine, the Textualiser, offers several reformulation modes: softening the tone of a message written in frustration, rephrasing it, or even turning it into poetry. It stays off by default, and no data ever leaves the device.
Features you will not find elsewhere
Most 'typing simulators' paste a fixed delay between keys, which stays perfectly detectable. A'Tipik models the real human rhythm.
Keystroke rhythm drawn from a Weibull distribution, with bursts and pauses, aware of the physical keyboard layout (AZERTY / QWERTY auto-detected).
Realistic typos injected from a physical key-neighbour model, followed by a pause, a backspace and a correction, exactly like a human hand.
Word-boundary hesitations, where the brain catches its breath between two ideas.
Optional Textualiser (a 100% on-device language model): write freely, in anger if you must, then let it soften the tone or rephrase before sending. The relief of having written it stays; the regret of sending it does not.
Poetry mode: it recomposes any sentence into verse. Useful when the bluntness or rawness of a word would trip moderation filters, while the person only wants a true dialogue: poetry carries the substance through without betraying the intent.
Zero network, zero telemetry, zero collection: everything happens on your machine.
The core, the KineticEngine, samples inter-keystroke intervals through an
A probability law that fits human waiting times well: neither perfectly regular nor purely random.
(via its inverse). The shape parameter k is modulated per profile (burst or pause); the scale parameter is computed per bigram from language frequency, physical key distance and a same-finger penalty. Keystroke injection uses the Win32 SendInput API with a correctly 64-bit-aligned INPUT union.
The optional Textualiser (tone softening, rephrasing, poetry) relies on a Rust bridge to llama.cpp: the system prompt is evaluated once and reused (KV cache), with per-message rewind, staying fast while never leaving the machine. Every optional stage is fail-safe: if the model is absent or errors, the text passes through unchanged and typing is never blocked. Timing model is reproducible by seed, with owned academic references (Bergadano et al. 2002; Killourhy & Maxion 2009).
More and more systems judge not what you write, but how your hands move: cadence, pauses, corrections. A neuro-atypical rhythm, slower, more irregular, broken by long stretches of thought, is then treated as suspicious, even as a bot. The problem is not the person, it is the metric.
A'Tipik takes difference as the prior, not the anomaly. This is not about cheating, but about restoring fairness: being judged on the substance of what you produce, not on the motor signature of your typing. It is the same conviction that runs through all of HOPE 'N MIND's research on neurodiversity, cognitive dignity and the right to think at one's own pace.
And because defending yourself is not enough: atypical people often speak with a direct frankness that moderation filters, tuned to an average politeness, read as aggression. Poetry mode transfigures rawness into verse, without betraying the substance, so a sincere dialogue is not cut off for its form alone. After all, rhythm and alliteration are a matter of mathematics; what stays human is the intent you put in and the truth you mean to say.