Local First Desktop App

while.coffee

A local Tauri vault for therapy preparation, orientation and self organisation. Private content stays on device. Product logic treats crisis situations as a safety boundary rather than an engagement feature.

Role: Product, architecture and implementation
Context: Independent product
Ownership: Sole owner, with implementation and reviews orchestrated across specialised agents
Delivery state: Active development
Evidenced: Architecture, real interface and test run evidenced
Next proof: Architecture and interface checked, user validation pending
Period: Since May 2026
Project page: while.coffee ↗

Local journal workspace with synthetic content

Context

Sensitive reflection data needs a different architecture from a conventional SaaS product. The application must remain useful offline, make exports deliberate and reliably route people to human help in acute situations.

My contribution

Defined the Local First product contract and data sensitivity classes

Implemented the Tauri and Svelte desktop architecture with a local vault

Embedded the crisis route as a permanently reachable offline layer

Built quality gates for language, safety changes and tests

Session preparation dialog with synthetic topics and notes

Organising important topics before a conversation

Decisions that shaped the product

Local over convenient

Private journaling content is not synced to a cloud. This reduces convenience while protecting the most sensitive data through a clear system boundary.

Safety before AI response

Every future LLM path must pass through the local safety layer first. When a crisis signal appears, AI interaction is blocked and the human support route takes priority.

Review before merge

A structured Claude Lens review found a privacy option that would always have produced an empty PDF in the handoff flow. I removed the contradictory state and retained a mandatory human merge gate for sensitive data.

Technical evidence

Documented test run

1,177 tests passed

Source: docs/handoff-2026-07-10-produkt-politur.md
Verified: 2026-07-10

Internal evidence, available during a technical interview

Verified revision

818becd

Source: local Git HEAD
Verified: 2026-07-16

Internal evidence, available during a technical interview

Application boundary

0 errors / 0 warnings

Source: docs/handoff-2026-07-10-produkt-politur.md
Verified: 2026-07-10

Internal evidence, available during a technical interview

Honest boundary

The product is in active development. It does not replace therapy or provide diagnoses. The screenshots show the real Svelte interface with synthetic data in an isolated browser environment, not the native Tauri window.