System Requirements Document for wifi-pin

1. Introduction

wifi-pin is a lightweight public utility that enables a person to generate a Wi-Fi PIN quickly. The product is intended for people who need a usable generated Wi-Fi PIN and should provide a clear, low-friction experience without requiring sign-in, account setup, or access to any Wi-Fi network.

The application must present the generator as a focused utility rather than as enterprise security software, a dashboard, or a network-management tool.

2. System Overview

wifi-pin is a custom web application with two public, anonymous application pages:

1. Landing
2. Generate PIN

The sole supported human actor is the Wi-Fi PIN Generator User. The user can learn what the utility does, navigate to the generator, provide the generator input, generate a Wi-Fi PIN, view the resulting PIN, and copy the result.

The current product scope is intentionally narrow:

• Generate a Wi-Fi PIN from user-provided generator input.
• Present the generated PIN clearly.
• Allow the generated PIN to be copied.
• Provide visible input-completion and generation-result feedback.
• Remain anonymous and publicly accessible.

The product must not imply that it can access, discover, join, administer, recover, or compromise Wi-Fi networks.

2a. Product Interpretation and Delivery Boundary

wifi-pin is delivered as a first-party, custom user interface. Both the Landing page and the Generate PIN page are publicly accessible and require no authentication.

The application owns the user interaction for entering generator input and showing the generated PIN. No provider-owned surface, external destination, account system, network connection, device administration workflow, or Wi-Fi credential verification process is included in the current scope.

The app generates a PIN result only. It does not promise network access, validate whether a PIN works with a particular router, scan local networks, retain generated PIN history, or manage Wi-Fi credentials.

2c. Page Content and Component Coverage

Landing

• Information and purpose

  • Explain that wifi-pin generates Wi-Fi PINs.
  • Identify the app as a quick, straightforward utility for users who need to generate a Wi-Fi PIN.
  • Use plain language that does not imply access to Wi-Fi networks the user does not own or administer.

• Primary action

  • Provide a clear navigation action to open the Generate PIN page.

• Supporting navigation

  • Present utility-style navigation labels using icon-plus-word labels:
    • HOME
    • GENERATOR
    • ABOUT
  • The active navigation item must be marked with a 10px pixel cursor rather than an underline.
  • Navigation must not create additional application pages beyond Landing and Generate PIN. ABOUT may be presented as informational content within the Landing page.

• Visual content

  • Display the friendly pixel-router hero illustration with three blocky signal bands.
  • Use original monochrome pixel pictograms, including router, signal arcs, key, clipboard, and small lock motifs where visually relevant.
  • Do not use stock photography.

• States

  • Loading state: render the Landing content shell without blocking the user from navigating to Generate PIN.
  • Error state: if non-essential decorative assets fail to load, preserve readable copy and the navigation action.
  • Recovery: provide the Generate PIN navigation action as an available fallback path.

Generate PIN

• Information and purpose

  • Clearly identify the page as the location for generating a Wi-Fi PIN.
  • Present a compact single-task generator console.
  • Arrange the label, input, action, and result in one continuous vertical sequence.

• Generator input

  • Provide one clearly labelled network/input field for the generator input.
  • Do not invent or present unsupported rules about the meaning, format, or source of the input.
  • Indicate incomplete required input with a small amber signal tile rather than a generic toast notification.

• Primary action

  • Provide a full-width GENERATE PIN button.
  • The user can activate the action after providing the required generator input.
  • The action must visually enter a short generation state before the resulting PIN is displayed.

• Generated PIN result

  • Display the generated Wi-Fi PIN in a prominent bordered digit strip.
  • Render the PIN in individual square character cells resembling a compact hardware or seven-segment display.
  • Show the generated PIN as the current result of the generation action.
  • Do not state or imply that the PIN has been verified against a network.

• Copy action

  • Provide a one-tap pixel clipboard button associated with the displayed generated PIN.
  • On successful copy, replace the clipboard glyph with a green check tile for 1.5 seconds.
  • The copied confirmation must be local to the result control and must not use a generic toast card.

• States

  • Initial state: show the input field and Generate PIN action; no generated result is displayed.
  • Incomplete-input state: show the amber signal tile and retain the user’s entered input for correction.
  • Generating state: briefly cycle the antenna icon through three pixel frames.
  • Success state: display the generated PIN in the digit strip and make the copy action available.
  • Copy-success state: show the green check tile for 1.5 seconds, then restore the clipboard glyph.
  • Error state: if generation cannot complete, show a concise, readable error near the generator console without clearing valid entered input.
  • Recovery: allow the user to correct input or activate Generate PIN again.

3. Functional Requirements

FR-1 — Generate a Wi-Fi PIN

User story: As a Wi-Fi PIN Generator User, I should be able to generate a Wi-Fi PIN so that I can obtain a usable PIN result.

• Provenance: explicit
• Access: Public and anonymous; no account or sign-in is required.
• Initiator: Wi-Fi PIN Generator User.
• Trigger/input: The user provides the generator input and activates the Generate PIN action.
• Behavior:
  • The system must accept the generator input through the Generate PIN page.
  • The system must generate and display a Wi-Fi PIN after the user activates the Generate PIN action.
  • The generated PIN must be visibly presented as the current result in the page’s PIN display area.
• Observable result: The user sees a generated Wi-Fi PIN in the bordered digit strip.
• Failure and recovery:
  • If required generator input is incomplete, the system must not generate a PIN.
  • The system must show an incomplete-input indicator using a small amber signal tile.
  • The user must be able to provide or correct the required input and try again.
  • If generation fails after valid input is submitted, the system must show an error near the generator console and retain valid entered input where possible.
  • The user must be able to retry generation.
• Continuation: After generation, the user can copy the displayed PIN or generate another PIN.
• Acceptance criteria:
  1. A public user can open Generate PIN without authentication.
  2. The page provides one labelled generator input field.
  3. The user can activate GENERATE PIN after providing required input.
  4. The app displays a generated Wi-Fi PIN after successful generation.
  5. The app does not claim that the generated PIN grants access to, validates, or controls a Wi-Fi network.

FR-2 — Validate Required Generator Input

User story: As a Wi-Fi PIN Generator User, I should receive clear feedback when required generator input is incomplete so that I can correct it before generating a PIN.

• Provenance: required_inference
• Access: Public and anonymous.
• Initiator: Wi-Fi PIN Generator User.
• Trigger/input: The user attempts to generate a Wi-Fi PIN without completing required generator input.
• Behavior:
  • The system must identify that the required generator input is incomplete.
  • The system must show a small amber signal tile as the incomplete-input indicator.
  • The system must retain the user’s entered input for correction.
• Observable result: The user can identify that more input is required and can return directly to the input field.
• Failure and recovery: The user can correct or complete the input and retry the Generate PIN action.
• Continuation: Upon completing the input, the user proceeds to generate a Wi-Fi PIN.
• Acceptance criteria:
  1. An incomplete generation attempt does not produce a PIN.
  2. The user receives an on-page incomplete-input indication.
  3. The incomplete-input indication is not displayed as a generic toast card.
  4. The user can correct the input without leaving the Generate PIN page.

FR-3 — Display Generation Progress and Result

User story: As a Wi-Fi PIN Generator User, I should see when generation is occurring and when it has completed so that I understand the status of my request.

• Provenance: required_inference
• Access: Public and anonymous.
• Initiator: Wi-Fi PIN Generator User.
• Trigger/input: The user activates the Generate PIN action with complete required input.
• Behavior:
  • The Generate PIN action must briefly cycle a tiny antenna icon through three pixel frames while generation is in progress.
  • After successful generation, the system must resolve the visual state into the generated PIN display.
• Observable result: The user sees a short functional generation indicator followed by the generated PIN.
• Failure and recovery: If the generator cannot complete, the generation indicator must end and an on-page error must be shown with a retry path.
• Continuation: The user can copy the result or generate another PIN.
• Acceptance criteria:
  1. Generation progress uses the three-frame antenna icon treatment.
  2. The motion is brief and functional.
  3. A successful result replaces the temporary generation state.
  4. A failed result provides a visible retry path.

FR-4 — Copy a Generated Wi-Fi PIN

User story: As a Wi-Fi PIN Generator User, I should be able to copy the generated Wi-Fi PIN so that I can use it elsewhere.

• Provenance: explicit design direction
• Access: Public and anonymous.
• Initiator: Wi-Fi PIN Generator User.
• Trigger/input: A generated Wi-Fi PIN is displayed and the user activates the pixel clipboard control.
• Behavior:
  • The system must copy the currently displayed generated Wi-Fi PIN to the user’s device clipboard when clipboard access succeeds.
  • The copy glyph must change to a green check tile for 1.5 seconds after successful copying.
  • The clipboard glyph must return after the confirmation period.
• Observable result: The user receives local visual confirmation that the displayed PIN was copied.
• Failure and recovery:
  • If clipboard access is unavailable or fails, the system must indicate that the copy action did not complete.
  • The generated PIN must remain visible so that the user can retry copying or use the PIN manually.
• Continuation: The user can retry copying or generate another PIN.
• Acceptance criteria:
  1. The copy action is available only when a generated PIN is displayed.
  2. A successful copy action changes the icon to a green check for 1.5 seconds.
  3. Copy feedback is not presented in a generic toast card.
  4. A failed copy action does not remove the generated PIN.

4. User Personas

Wi-Fi PIN Generator User

• Provenance: required_inference from Planning Scope.
• Product context: This person visits wifi-pin to generate a Wi-Fi PIN through a focused, public utility interface.
• Primary goal: Obtain a generated Wi-Fi PIN quickly.
• Distinct responsibilities:
  • Understand that the application is a Wi-Fi PIN generator.
  • Navigate from Landing to Generate PIN.
  • Provide the generator input required by the app.
  • Initiate PIN generation.
  • Review the generated PIN.
  • Copy the generated PIN when needed.
• Relevant inputs and decisions:
  • Decide when to move from the Landing page to the generator.
  • Provide the required generator input.
  • Decide whether to retry generation after incomplete input or an error.
  • Decide whether to copy the generated PIN.
• Interaction with other participants: None. The user is the only active human participant in the current product scope.
• Observable success: The user sees a generated Wi-Fi PIN and, if desired, receives confirmation that it was copied.
• Constraints: The user does not need an account, authentication, stored history, network-management access, or Wi-Fi-network access to use the current app.

5. Core User Flows

Flow 1 — Learn About the Utility and Open the Generator

1. The Wi-Fi PIN Generator User opens the public Landing page.
2. The Landing page presents the wifi-pin purpose: generating Wi-Fi PINs through a lightweight utility.
3. The user reviews the concise explanation and visual router-and-signal illustration.
4. The user selects the GENERATOR navigation option or the primary generator action.
5. The application opens the public Generate PIN page.
6. The user continues to the generator input.

Recovery: If decorative content does not load, the Landing page still provides readable purpose text and a working route to Generate PIN.

Flow 2 — Generate a Wi-Fi PIN

1. The Wi-Fi PIN Generator User opens the public Generate PIN page.
2. The page displays the labelled generator input field and the GENERATE PIN action.
3. The user enters the generator input.
4. The user selects GENERATE PIN.
5. The application checks whether the required input is complete.
6. If the input is incomplete, the application displays the amber signal tile near the generator input.
7. The user corrects or completes the input.
8. The user selects GENERATE PIN again.
9. The application briefly cycles the antenna icon through three pixel frames.
10. The application generates the Wi-Fi PIN.
11. The generated Wi-Fi PIN appears in the bordered digit strip with individual square character cells.
12. The user can copy the result or generate another PIN.

Recovery: If generation cannot complete, the application shows an on-page error near the generator console, retains valid input where possible, and allows the user to retry.

Flow 3 — Copy a Generated Wi-Fi PIN

1. The Wi-Fi PIN Generator User completes the PIN generation flow and sees a generated PIN on Generate PIN.
2. The user selects the pixel clipboard button associated with the generated PIN.
3. The application attempts to copy the displayed PIN to the device clipboard.
4. If copying succeeds, the clipboard glyph changes to a green check tile for 1.5 seconds.
5. The application restores the clipboard glyph after the confirmation period.
6. The user continues with the copied PIN outside the app or generates another PIN.

Recovery: If clipboard access fails, the application indicates that copying did not complete while keeping the generated PIN visible for manual use or another copy attempt.

6. Visuals Colors and Theme

Muse: Susan Kare
Headline: Charming clarity for a tiny Wi-Fi utility

wifi-pin must feel like a compact, trustworthy, device-native utility. The visual style should be friendly, tactile, legible, and purpose-built for one small task. It must not resemble a generic SaaS dashboard or enterprise security product.

Color Tokens

Typography

• Heading font: Pixelify Sans, 700 weight.
• Body font: DM Sans.
• Heading usage: Short, compact headings and numeric PIN moments only.
• Body usage: Instructions, labels, helper text, error text, and navigation labels.
• Type scale: 56px / 40px / 32px / 25px / 20px / 16px / 14px.
• Generated PIN type:
  • Desktop: 48px.
  • Mobile: 36px.
  • Use tabular numerals.
  • Render within individual square character cells.
• Use slightly tightened tracking for Pixelify Sans headings.
• Do not use all-caps paragraphs.

Shape and Surface Language

• Use flat, crisp colors only.
• Use pixel-stepped corners and deliberately square controls.
• Use 2px charcoal outlines.
• Use compact 8-bit icon tiles.
• Use a 4px charcoal hard offset shadow for buttons and prominent utility panels.
• When a button is pressed, its shadow must compress to 1px.
• Use a subtle 4px pixel grid only in decorative dividers.
• Do not use gradients, blur, glassmorphism, glow, soft elevation, or generic rounded SaaS cards.

Layout

• Use a slim top bar.
• On desktop:
  • Place editorial introduction content on the left.
  • Place the large generator console on the opposite half.
  • Position the oversized pixel router illustration at the right edge at approximately 42vw wide.
• On mobile:
  • Place the generator console immediately after the headline.
  • Preserve the uninterrupted vertical sequence of label, input, action, and result.
• Do not use an oversized dashboard, metric tiles, or a grid of identical cards.

Imagery

• Use original monochrome pixel pictograms only.
• Include visual motifs such as:
  • Router
  • Signal arcs
  • Key
  • Clipboard
  • Small lock
• The primary hero illustration is a friendly pixel router transmitting three blocky signal bands.
• Do not use stock photography.

Required Hero Direction

• Use the warm paper background.

• Place the oversized pixel router at the right edge.

• Extend three stepped signal bands behind and across the viewport in muted cream and brick orange.

• Set the two-line headline as:

  MAKE A /
  WI-FI PIN

• Render the slash in brick orange.

• Present the generator console as a cream handheld-utility panel with:

  • 2px charcoal border
  • Hard charcoal offset shadow
  • One clearly labelled network/input field
  • Full-width brick-orange GENERATE PIN button
  • Built-in seven-segment-like PIN strip

7. Signature Design Concept

The Landing experience uses a signal-to-console composition.

A large friendly pixel router sits at the right edge of the warm paper canvas while stepped signal bands extend across the viewport. One signal band becomes a horizontal divider that naturally leads into the generator console. The console is styled as a handheld hardware utility: a cream rectangular panel with a hard charcoal border, square controls, and a deep brick-orange Generate button.

When a PIN is generated, the result does not appear as a conventional software card. It resolves directly into a hardware-like digit strip with individual square cells. The adjacent clipboard control provides a tactile pixel interaction and changes into a green check tile after copying.

This concept reuses only accepted Landing and Generate PIN content while making the generator feel memorable, compact, and useful.

8. Interaction Model & Motion Direction

Interaction Model: Animated
Motion Tempo: restrained
Hero Dimensionality: flat

Landing Hero Motion Brief

• Focal subject: A friendly pixel router transmitting three stepped signal bands across the warm paper background.
• Input → transformation → outcome thesis: The user moves from the Landing page into the generator utility; the static router-and-signal visual world transitions into the practical generator console where input becomes a generated Wi-Fi PIN.
• Motion vocabulary: Functional frame-by-frame pixel animation only.
• Composed first frame: The hero opens with the pixel router positioned at the right edge, three signal bands extending behind it, the “MAKE A / WI-FI PIN” headline on the left, and the generator console visible as the practical next action.
• Generation motion: When the user selects GENERATE PIN, a tiny antenna icon cycles through three pixel frames before the PIN resolves in the digit strip.
• Copy confirmation motion: On successful copy, the clipboard glyph is replaced by a green check tile for 1.5 seconds.
• Motion constraints: No floating elements, no parallax, no cinematic transitions, no easing theatrics, and no decorative motion that delays use of the generator.
• Reduced-motion state: Disable frame cycling and state swaps that animate over time. Show the generator result immediately after completion and show the copied green check state without animated transition.

9. Non-Functional Requirements

NFR-1 — Public Anonymous Access

• Provenance: required_inference from Planning Scope.
• Both Landing and Generate PIN must be accessible without sign-in, account creation, invitation, provisioning, or identity verification.
• The application must not require user identity to generate or copy a Wi-Fi PIN.

NFR-2 — Clear, Low-Friction Utility Experience

• Provenance: creative direction.
• The app must provide a compact single-task experience.
• The primary generation path must remain visible without requiring dashboard navigation or multi-step setup.
• The generator console must keep label, input, action, and result in a continuous vertical sequence.

NFR-3 — Legibility and Contrast

• Provenance: creative direction.
• Readable copy and outlines must use charcoal #1B1B18.
• Thin, low-contrast text must not be used.
• The generated PIN must be visually prominent and use tabular numerals.
• Pixel-inspired styling must not reduce body-text readability.

NFR-4 — Functional Motion Only

• Provenance: creative direction.
• Motion must be restrained and purpose-driven.
• The generation interaction may use only the specified three-frame antenna cycle.
• The copy confirmation may use only the specified 1.5-second check-state swap.
• The product must provide a reduced-motion presentation that does not depend on animation to communicate results.

NFR-5 — Honest Product Communication

• Provenance: explicit design constraint.
• The application must not make security claims or imply access to Wi-Fi networks the user does not own or administer.
• The application must not claim that generated PINs are verified, network-specific, guaranteed to work, or capable of granting network access.

NFR-6 — Resilient User Recovery

• Provenance: required_inference.
• An incomplete-input state must preserve entered input for correction.
• A generation failure must preserve valid entered input where possible.
• A clipboard failure must preserve the visible generated PIN.
• Decorative asset failures must not prevent access to the Generate PIN action.

10. Tech Stack

The user has not specified a technology stack.

• Frontend: React.
  [Default — not specified by user] React is appropriate for the two-page custom web interface, generator form state, generation status, copy feedback, and reduced-motion handling.

• Styling: CSS with custom design tokens.
  [Default — not specified by user] CSS is appropriate for the required pixel-stepped corners, 2px outlines, hard shadows, responsive layout, typography, and frame-based visual states.

• Backend: Python with FastAPI.
  [Default — not specified by user] A small FastAPI service may expose the Wi-Fi PIN generation operation if generation is implemented server-side.

• Storage: No persistent application storage is required for the current scope.
  [Default — not specified by user] The current requirements do not include accounts, generation history, saved PINs, or stored user preferences.

• Containerization: Docker and docker-compose for local development and deployment consistency.
  [Default — not specified by user]

• Kubernetes: Not required.
  [Default — not specified by user] The current two-page utility does not establish a deployment requirement that justifies Kubernetes.

11. Assumptions and Constraints

Assumptions

• Generator input semantics are unspecified.
  [Assumption — source does not define input format] The app will provide one labelled generator input field, but the source does not define the exact field label, accepted values, validation rules, PIN length, PIN format, or generation algorithm.

• Generated PIN validity is not guaranteed.
  [Assumption — required to avoid unsupported security claims] The app displays a generated PIN but does not verify that the PIN works with any specific router, network, device, or access point.

• No identity continuity is required.
  [Assumption — supported by public access contract] The app does not retain user-specific state across sessions and does not provide generation history.

• Clipboard capability depends on the user environment.
  [Assumption — required for copy recovery] The app will attempt to use the device clipboard where supported and will preserve the visible PIN if clipboard access is unavailable.

Constraints

• The page inventory is fixed to:
  1. Landing
  2. Generate PIN
• Both pages must remain publicly accessible with no access requirement.
• The persona catalog is fixed to:
  • Wi-Fi PIN Generator User
• The application must not add account management, sign-in, Wi-Fi scanning, router administration, PIN history, network discovery, network verification, or network-access functionality.
• The visual design must preserve the supplied warm-paper palette, Pixelify Sans and DM Sans font pairing, cream utility surfaces, brick-orange primary action, green success state, pixel-inspired components, compact layout, and restrained functional motion.
• The generic indigo or blue-on-white SaaS template is forbidden.

12. Glossary

• Wi-Fi PIN: The PIN value generated and displayed by wifi-pin. The product does not claim that the value provides, confirms, or guarantees access to any Wi-Fi network.
• Generator input: The single user-provided input required before the app generates a Wi-Fi PIN. Its exact format and semantics are not defined in the current requirements.
• Generated PIN: The current Wi-Fi PIN result displayed in the Generate PIN page’s digit strip.
• Digit strip: The bordered result display composed of individual square character cells, styled like a compact hardware or seven-segment display.
• Amber signal tile: The small pixel-styled indicator used to communicate incomplete required generator input.
• Green check tile: The pixel-styled confirmation shown for 1.5 seconds after a generated PIN is successfully copied.