Human Capacity Framework. Version 1.0
This is not a finished post. It is a hypothesis. I am writing it because I observed it first in a body that loses and regains capacity every day: my own. This is not a text about illness. The body is the seismograph. Fragility increased its sensitivity, and Human Notes is born from the attempt to interpret the waves it began to record.
The hypothesis states that every design decision is a decision about human capability, even if the designer does not know it and even if no one measures it. We do not live among objects. We live among verbs. If it is false, it will fall apart on its own. If it is true, it changes how you look at every object around you.
Ask yourself as you read: what capacity am I giving up now.
1. The anomaly
For years I thought the only thing that fluctuated was my body. Some days I could write for four hours. Others, answering an email was impossible. At first I blamed the tremor, the medication, and the sleep. Afterward I began to look around and discovered that some objects reduced the difference between a good day and a bad day, while others widened it.
A mug with a thick handle gave me back the possibility of drinking without help. An interface that anticipated my clicks took away the decision of choosing. A bed that was too high stole the impulse to get up. An automatic door made me forget that the gesture of opening existed.
And the phone. The phone knows you so well it could jerk you off with the exact rhythm that only you give yourself. It knows when you speed up your scroll, the exact second you stop, and which image tightens your breathing before you even admit it to yourself. It is not magic. It is transference. You handed over years of micro-gestures. Now it has the cadence.
That was when I thought that design doesn't just modify objects. It modifies people's capacity, including the capacity to desire without it being anticipated for you. Capacity wasn't a fixed resource that I had or stopped having. It was something I practiced or abandoned. And the environment decided, silently, how much I practiced. That suspicion became the hypothesis.
2. The contrast
We do not know through information. We know through contrast. Whoever has never lost their voice does not truly know what it means to be able to speak and be heard. Whoever has never lost the power to decide does not know the value of choosing. Whoever has never lost the will does not fully understand what it means to have the will to live.
Experience does not merely accumulate memories. It tunes instruments of perception. Intermittency does not turn the body into a better body. It turns perception into one of higher resolution. When for a few hours you cannot lift an arm and then you move it again, you understand movement in a way that was previously impossible.
Verbs change in price. Walking costs more. Talking costs more. Sleeping costs more. Kissing costs more. And precisely because they cost more, you begin to measure their true value. I live like a Formula 1 car not because I want to go faster, but because any loss of efficiency could mean not making it. Every decision consumes energy that I won't be able to spend on something else later.
That intermittency doesn't just hurt. It also calibrates the seismograph. And that same resolution allows you to see something that is hard to unsee: interfaces redistribute capacity. There are designs that leave you better than they found you, and there are designs that work perfectly while, silently, they leave you a little more dependent, a little more tired, a little less capable.
3. What nobody measures
Marketing teams celebrate engagement. Hospitals measure healing. Cities measure flow. Schools, grades. All of those metrics are real and show that something is working. None of them answer the question that began to obsess me: what happens to human capacity while that works. Design leaves a person more connected to their own judgment or less. More autonomous or more dependent.
There is no neutral design. Only consequences we do not yet know how to measure. What an organization measures is what it values, and what it values is what it ultimately builds. If you don't look at capability, capability doesn't exist in the meetings where it is decided what the world will look like.
4. The axiom
A chair is not a three-dimensional object. It is an invitation to a way of being seated. An app is not software. It is a system of decisions about what version of yourself you can be when you use it. A street is not asphalt. It is a contract among strangers about who trusts whom. A hospital is not a building. It is architecture of fear and, sometimes, of dignity.
When I started seeing objects that way, I stopped asking if they worked and started asking what was being while they worked. From there came the axiom: every design decision is a decision about human capability. Not about the object. About who you can be after using it. Every design decision ends up written on a body.
5. How we learned not to look
Blindness is not new. We measure production and the worker became a repeated gesture. We measure beauty and function: objects improved. We measure satisfaction and optimize the experience. Now we measure usage time, repetition, and retention. In each phase we improve something and ignore the same thing: what person remains on the other side. The metric defines reality. If you only look at the object, the person becomes invisible.
6. What is capacity
It is not talent. It is not skill. It is not what you know how to do. It is the sum of possibilities you have of being yourself. It includes being able to recognize what you want without being prompted, anticipating consequences, trusting your judgment, resisting when something asks you to change, choosing without perfect information, being alone without panic, and recognizing yourself in the midst of chaos.
Capacity is not fixed. It is a muscle. It is practiced or it atrophies. Navigating without help increases orientation. Delegating it reduces it. Reading long-form increases concentration. Fragmenting attention reduces it. Doing hard things increases resilience. Eliminating all difficulty reduces it. Design builds the environment in which you use those muscles or the environment in which you can forget them.
And here something more serious appears: capacity and identity are coupled. Your identity is not something you have. It is something you do. When the environment replaces you, you don't just lose a gesture. You lose the possibility of practicing who you are. Each interface leaves behind a different version of whoever uses it.
7. I am wind
Happiness has never seemed like a goal to me. It is a moment. A wind direction. There are hours when it blows west and hours when it blows east. Parkinson's forces me to live those two directions on the same day. I can go from not being able to get off the sofa to feeling, a few hours later, an immense urge to run, jump, and embrace the world.
I used to think that made me unstable. Now I believe it just reminds me of something that was always true: that no state lasts. The only thing I cannot afford to lose is my identity. Let the wind change. Let my body change. Let my energy change. But let who I am not change. I am not the good day. Nor am I the bad day. I am the wind. And the wind can blow in any direction without ever stopping being the wind.
8. The residue
Every object is a teacher. It does not teach with words. It teaches with practice. An automatic door teaches not to anticipate, not to push, and simply to approach. After thousands of times, the body no longer waits and moves forward. A well-balanced knife teaches how to trust the blade, the wrist, and the resistance of the food. The residue is precision and presence.
The mobile feed shows something else. It shows the rhythm of your own arousal. It leaves you hanging on purpose. The residue is not just fragmented attention. It is a body that no longer remembers how to reach the end on its own because the cadence has been outsourced.
What remains after the interaction is the residue. It is not a side effect. It is the design itself operating on you. The design does not end when the interaction ends. It continues to live within the person who used it. Every design leaves something behind and takes something away. Your life is not what happens when something works. Your life is the accumulated residue of everything that has worked. The question that reorganizes everything is what residue this design needs to leave behind to deserve to exist.
9. The transfer
When you use a designed object, you enter into a contract. You don't sign it, but it exists: you surrender capacity and the object gives you something back in return. It is almost never symmetrical. The benefit is immediate and visible. The loss is slow and invisible.
There are transfers that multiply capacity and transfers that extract it. Learning a trade, a tool that demands mastery, a difficult conversation that leaves you more capable of telling the truth: these leave behind more than they took. Others leave behind less: the system gains autonomy and you lose it. Not all delegation is a loss. The criterion is not whether or not something is yielded, but what remains afterwards. Frequently, what maximizes comfort degrades capacity.
The question that modern design almost never asks is: do I want to be more comfortable or more capable. Because in many cases you cannot have both at the same time. Every technology redistributes human capacity.
10. Just a moment
I remember the first time I took levodopa after years of having the disease undiagnosed. I went out to eat with my parents and my partner. I took it after the meal and I felt like a dog when you let it loose on the beach. I started running, jumping over benches, climbing lampposts. They kept telling me, stop, stop. I felt so happy and with such a desire to push my body to the limit that I hadn't experienced in years.
That scene doesn't demonstrate the theory. It does something better: it makes you feel it. Recovering the ability to strike explains, better than any definition, what it means to have lost it. And also what is at stake every time a design asks you to give it up.
11. Anticipated users.
The industry always talks about extreme users. I prefer to think that we are anticipated users. Today's battered bodies are often tomorrow's average body. We all age. Many of us will get sick. We will all lose capacities sooner or later. Designing for fragility is not designing for a minority. It is designing for everyone's future.
I am in my early forties. There are days when my body acts as if it were eighty. That has given me an unexpected relationship with the elderly. Not because I am a better person, but because for a few hours we share the same language. I understand the slowness. I understand the fear of falling. I understand the invisible effort behind gestures I used to call everyday. And I understand the fog: it is neither forgetfulness nor absent-mindedness, it is that words arrive late, that the sentence falls apart halfway through, that you know what you want to say and when you open it up only vapor remains.
Empathy is not born of kindness. It is born of having inhabited, even if for just an instant, the reality of the other. That is why we must protect fragility. Not because it is weak. But because it is the place from which we see the future first.
The true interface is always the body.
12. Laboratory vocabulary
To see something new, you must be able to name it. These words do not describe objects: they name what an object leaves behind in a person when they finish using it. They are not jargon; they are instruments of observation. Without them, what Human Notes looks at remains nameless once again—and what is not named cannot be looked at.
Residue
What remains afterwards.
Transfer:
What is yielded and what returns.
Autonomy:
Decide without being prompted.
Contrast:
What the price makes visible.
Early user:
He who lives today is the body of tomorrow.
Interface:
Where capability meets the world.
Seismograph
The body that registers what design does not name.
13. The Grammar
If vocabulary names the parts, grammar says what role each one plays. It is not a list of definitions: it is the distribution of functions within the system—what is observed, with what, and what is at stake. Read at a glance, it is the entire framework.
Experience
The statement
↓
Verb
The unit
↓
Object
The interface
↓
Body
The seismograph
↓
Cost
The variable
↓
Observation
Living Human Capacity Protocol
↓
Displacement
The Law of Displacement
↓
Capacity
What is at stake
↓
Human Notes
The registry
14. How we look now
Order matters. First the body. Then the intervention. In the end, the claim. We do not start by asking whether a product restores energy or has a positive balance. We start by looking at what a person could do, what intervened, what changed, what it cost, and what remained. Only afterward can it appear, as an observation, that there was an increase in autonomy, a loss of judgment, an extension of a capacity, or a dependency.
The questions that guide the gaze are these: Can I decide? Do I understand what is happening and why? Can I modify or stop the use without everything collapsing. Do I come out with more or fewer resources than when I went in. Am I still recognizably myself. After this, can I do harder things. They are not a scoring system. They are a compass. Better an imperfect compass than continuing to measure only engagement.
15. Demonstration
So much for the hypothesis. Now I'm putting it to the test.
A cup with a narrow, thin handle is invisible on a good day and becomes an obstacle on a tremor-filled day. It forces me to ask for help or to drink with both hands, clumsily. A cup with a thick handle, balanced weight, and a rim that doesn't burn returns the gesture to me. I can drink alone. The residue is dignity and the practice of gripping. Same function, opposite effects on capability. The design of the cup decided, without announcing it, whether that day I would practice autonomy or dependence.
An autonomous person enters the hospital and leaves, at best, cured. In many cases they also leave disconnected from their own body: they do not understand what happened to them, they did not participate in the decisions. A regenerative hospital does something different: during the stay it begins to restore capacity. The patient not only heals. They leave more capable of inhabiting their body.
16. How I could be wrong
A hypothesis that does not try to destroy itself is not a hypothesis. It is an opinion. The objections that concern me the most are these.
Automation sometimes liberates: an electric wheelchair, an insulin pump, a cochlear implant. In those cases, the object does not extract capacity, it gives it back. The hypothesis is not against automation. It is against any design that leaves less capacity than it took. The criterion remains what is left behind.
I am not romanticizing effort. Productive friction teaches and multiplies. Extractive friction only exhausts. The test is not whether it hurts. It is whether after hurting you are more capable. If artificial intelligence makes me more capable, perfect. If it leaves you more dependent and less master of your own judgment, it is extractive. The name of the technology does not change the test.
These objections do not weaken the hypothesis. They force it to be more precise. And precision is the only way it is worth defending.
17. What remains open
This is still a hypothesis. It was born from observing a fluctuating body. It became a suspicion upon seeing that the surrounding objects magnified or reduced that fluctuation. It was formulated as an axiom. There are two discoveries.
The first is the axiom: every design decision transfers capacity.
The second is methodological: fragility increases the resolution with which we observe design. The so-called extreme users are not just people to design for. They are people to research from.
It is not proven. It is framed in such a way that it can be refuted. If someone shows a design that radically improves life without touching human capacity, the hypothesis is weakened. If it turns out that comfort and capacity can be stably maximized together, everything must be rewritten. Meanwhile, the question remains operational: what capacity does this design ask of me? What does it give back to me? Am I more myself or less myself afterward.
For a century we asked what objects could do. Perhaps the time has come to ask what people can continue to do after living among them. We do not design objects. We design the people who will be possible after living with them.
The rest of the work exists to keep testing it.
—
Manu Bueno
Human Notes