FACTUAL ACTIVITY RECORD · An activity record based on work that took place

Establishing UI design sources of truth and locale paths

Aligning page-specific design files with URL, cookie, and language-header precedence

Activity period: 2026-08-14 — 2026-08-14

Purpose

The implementation needed page-specific visual sources of truth and locale rules that reliably direct unprefixed URLs to localized pages.

Implementation

A shared library and .pen files for Home, Legal, Habitat, and News were introduced to manage key desktop, mobile, Japanese, and English states. Locale resolution now follows explicit URL, cookie, Accept-Language, then Japanese default, with aligned entry redirects for feeds, privacy, and terms.

AGENTS.md — UI design source-of-truth excerpt with only its locator generalizedExcerpt sanitized for publication

## UIデザインのマスタ

- このプロジェクトのUIデザインの正本は、page別design masterです。

Explicit URLs remain route authority; entry resolution then uses saved locale, Accept-Language, and the default locale.

Rendering diagram…

What was confirmed

Verification results

Web tests, structural audits, type checking, builds, design layout, and exports passed.

Sample wording inside .pen files remained a visual-review aid rather than the source of truth for published copy.

Basis for completion

The work was complete when design references and locale-routing precedence matched across implementation, tests, and documentation.