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Software Behaviorby Joost van der Zwan
Index

01 · The book

Six arc stages, fifteen chapters.

Read from the top, or jump to the stage you’re standing in.

Searches chapter titles, section headings and framework names on this device. The query is not stored or measured.

A finger about to touch the screen of a phone lying on a table.

Stage I · 1 / 6 · 2 chapters

Recognition.

Naming what you're already feeling.
  1. 00Introduction — When the Role Stops Fitting
  2. 01The Screen Is No Longer the Whole Product
Begin stage I

Stage I

2 chapters

0 / 2 read

Recognition

Naming what you're already feeling.

  1. Introduction — When the Role Stops Fitting

    How to examine the gap between your role, attention, and evidence.

    Unread· 7 min· Revised

  2. The Screen Is No Longer the Whole Product

    More product judgment is becoming visible across the stack.

    Unread· 13 min· Revised
A hand pressing the touchscreen of a ticket machine on a station platform.

Stage II · 2 / 6 · 2 chapters

Reframing.

A new lens for what software is now.
  1. 02The Product Is Beneath the Interface
  2. 03From Deterministic Software to Negotiated Software
Begin stage II

Stage II

2 chapters

0 / 2 read

Reframing

A new lens for what software is now.

  1. The Product Is Beneath the Interface

    Seeing software as a behavioral system, not only a surface.

    Unread· 17 min· Revised

  2. From Deterministic Software to Negotiated Software

    The contract between user and machine has changed. The product has to too.

    Unread· 19 min· Revised
A hand drawing three connected boxes in pencil on grid paper.

Stage III · 3 / 6 · 2 chapters

Excitement.

What becomes possible from inside the new lens.
  1. 04Designing Behavior, Not Just Interaction
  2. 05Workflow Authors Reshape the Work
Begin stage III

Stage III

2 chapters

0 / 2 read

Excitement

What becomes possible from inside the new lens.

  1. Designing Behavior, Not Just Interaction

    A new craft, named.

    Unread· 16 min· Revised

  2. Workflow Authors Reshape the Work

    The work itself is product material.

    Unread· 19 min· Revised
A hand on a laptop trackpad in a dark room, one dialog lit on the screen.

Stage IV · 4 / 6 · 5 chapters

Seriousness.

What this craft now demands of you.
  1. 06Delegation Is a Design Material
  2. 07Trust Is a Product Layer
  3. 08Taste as Operational Judgment
  4. 09Builders Need Strategy Now
  5. 10Technical Depth Without Technical Captivity
Begin stage IV

Stage IV

5 chapters

0 / 5 read

Seriousness

What this craft now demands of you.

  1. Delegation Is a Design Material

    How much the system may do on your behalf is a design decision, not a property of the model.

    Unread· 15 min· Revised

  2. Trust Is a Product Layer

    Trust is built in the structure of the product, not promised in the copy.

    Unread· 16 min· Revised

  3. Taste as Operational Judgment

    Taste is what decides what should not exist.

    Unread· 11 min· Revised

  4. Builders Need Strategy Now

    Strategic product judgment belongs inside the build.

    Unread· 14 min· Revised

  5. Technical Depth Without Technical Captivity

    Enough fluency to design well. Not so much that it becomes the identity.

    Unread· 15 min· Revised
Two hands laying out three blank cards on a wooden table.

Stage V · 5 / 6 · 3 chapters

Agency.

Acts you can run this week.
  1. 11Prototype the Behavior
  2. 12Build Evidence of a New Identity
  3. 13Repositioning Without Pretending
Begin stage V

Stage V

3 chapters

0 / 3 read

Agency

Acts you can run this week.

  1. Prototype the Behavior

    Match the prototype's fidelity to the risk it needs to test.

    Unread· 18 min· Revised

  2. Build Evidence of a New Identity

    The new role becomes legible to others when there is something to point at.

    Unread· 12 min· Revised

  3. Repositioning Without Pretending

    Move into the role you can defend, not the role you want.

    Unread· 11 min· Revised
A person working at a laptop on a desk under a lamp, late in the evening.

Stage VI · 6 / 6 · 1 chapter

Commitment.

Standing for the new role.
  1. 14The Practice of Product Authorship
Begin stage VI

Stage VI

1 chapter

0 / 1 read

Commitment

Standing for the new role.

  1. The Practice of Product Authorship

    Authorship is the practice that holds the role across years.

    Unread· 11 min· Revised
The Field Kit is a library of skills for your AI tools: one for every Field Note, plus a design review skill that checks a screen or flow against the book’s 15 frameworks.
Open the Field Kit

The Product Architect · Contents

Stages I–VI · 15 chapters