# Aulvem

> Aulvem is a solo studio. The blog covers UI design, Figma, Vue.js, Astro and Cloudflare; the products focus on everyday workflows and data. Build it, write it down — that is the loop.

## Docs

- [About](https://aulvem.com/about/): Profile and focus areas
- [Privacy](https://aulvem.com/privacy/): Privacy policy
- [Affiliate Policy](https://aulvem.com/affiliate-policy/): Disclosure policy

## Products

- [Yasugoro — a real-price watcher that tells you when and where to buy](https://aulvem.com/products/yasugoro/): Yasugoro is a price watcher that compares the real price (display price minus reward points) across Japanese marketplaces — Rakuten, Yahoo!, Amazon and others — and sends a Web Push when a staple you're watching actually gets cheaper. No login, used anonymously.
- [ヤスゴロ — 実質価格で「いつ・どこで買うのが得か」を通知する価格ウォッチャー](https://aulvem.com/ja/products/yasugoro/): ヤスゴロは、表示価格からポイント還元を引いた実質価格で複数モール（楽天・Yahoo!・Amazon ほか）を横断比較し、ウォッチした消耗品が「いつ・どこで買うのが得か」を Web Push で通知する価格ウォッチャーです。ログイン不要・匿名で使えます。
- [Shōhyō (証憑) — verified ground truth for Japanese invoice & receipt extraction](https://aulvem.com/products/japanese-invoice-receipt-extraction-eval/): A labeled evaluation dataset for measuring document-to-JSON extraction on Japanese invoices and receipts. Japanese-era dates, reduced vs standard tax, withholding, qualified-invoice rules and revenue stamps are arithmetically verified on the answer side. Free sample on Hugging Face.
- [証憑 · Shōhyō — 日本語の請求書・領収書を JSON 抽出する評価データセット](https://aulvem.com/ja/products/japanese-invoice-receipt-extraction-eval/): 和暦・軽減税率・源泉徴収・適格請求書（インボイス制度）・収入印紙税といった日本語帳票特有のロジックを、正解側で算術まで検証した「文書 → JSON」抽出の評価データセット。OCR ではなく、テキスト入力に対する抽出の正しさを採点します。無料サンプルを Hugging Face で公開中。
- [Password Manager Sheet — Personal Edition](https://aulvem.com/products/password-sheet-personal/): A single Google Sheet for taking stock of your logins, subscriptions, and what's due for rotation — all on one dashboard. For Japanese-speaking users.
- [パスワード管理シート — Personal Edition](https://aulvem.com/ja/products/password-sheet-personal/): Google スプレッドシート 1 枚で完結するパスワード整理ツール。登録サービス・サブスク・要更新を 1 つのダッシュボードで把握でき、入力は 6 項目だけで強度判定・重複警告・月額合計は自動計算。金融サービスの 2FA 未設定も赤色で警告します。GAS や拡張機能は不要です。
- [Futari Kakeibo — Muted Linen Edition](https://aulvem.com/products/futari-kakeibo-muted-linen/): A muted-beige / linen colorway of the Futari Kakeibo template — the calmer, more grown-up version that sits well in a shared living room. For Japanese-speaking households.
- [Futari Kakeibo — Sky Apricot Edition](https://aulvem.com/products/futari-kakeibo-sky-apricot/): A cool sky-blue and apricot colorway of the Futari Kakeibo template. Light, easy to read, and a kinder dashboard for the early-morning household budget check. For Japanese-speaking households.
- [ふたりの家計簿 — Muted Linen 版｜くすみベージュの二人暮らし家計簿スプレッドシート](https://aulvem.com/ja/products/futari-kakeibo-muted-linen/): 二人暮らし向け家計簿テンプレートのカラーバリエーション。くすみベージュ × リネンの落ち着いた配色で、リビングに開きっぱなしでも目に優しくインテリアになじみます。機能は Sakura Duo 版と完全共通で、負担割合カスタムと自動精算に対応。Excel と Google スプレッドシート両対応です。
- [ふたりの家計簿 — Sky Apricot 版｜水色×アプリコットの二人暮らし家計簿スプレッドシート](https://aulvem.com/ja/products/futari-kakeibo-sky-apricot/): 二人暮らし向け家計簿テンプレートのカラーバリエーション。涼やかな水色 × アプリコットの爽やかな配色で、夏でも気持ちよく続けられます。機能は Sakura Duo 版と完全共通で、負担割合カスタムと自動精算に対応した Excel／Google スプレッドシート版です。
- [Claude Projects Knowledge Vault — Notion Template](https://aulvem.com/products/claude-projects-knowledge-vault/): A Notion template for Claude power users — projects, knowledge files, custom instructions and prompts in one place, so the next conversation can pick up where the last one left off.
- [EPR Compliance Pro — Snapshot v0.1 (cross-border e-commerce regulation dataset)](https://aulvem.com/products/epr-compliance-pro/): Packaging EPR and de minimis import thresholds for DE/FR/IT/ES/NL/GB/US — with source URLs, confidence rationale, and a change log. Built to slot into ISO / SOC 2 audit trails.
- [Futari Kakeibo — Sakura Duo Edition](https://aulvem.com/products/futari-kakeibo/): A shared household budget template for two — in a soft sakura-pastel palette. Splits shared and personal expenses, runs your custom split ratio, and tells you who owes whom each month. For Japanese-speaking households.
- [Claude Projects Knowledge Vault — Notion テンプレート](https://aulvem.com/ja/products/claude-projects-knowledge-vault/): Claude のプロジェクト・ナレッジ・カスタム指示・プロンプトを一元管理する Notion テンプレート。Projects／Knowledge／Instructions／Prompts／Activity の 5 つの連携 DB で会話のコンテキストを次のセッションへ持ち越せ、購入後はワンクリック複製ですぐに使い始められます。無料 Notion でも動作。
- [EPR Compliance Pro — Snapshot v0.1（越境 EC 向け規制データセット）](https://aulvem.com/ja/products/epr-compliance-pro/): DE/FR/IT/ES/NL/GB/US 7 か国の包装 EPR・de minimis 関税閾値を、抽出元 URL・取得日時・信頼度根拠・変更履歴付きで提供する監査対応データセット。JSON／CSV と JSON Schema（Draft 2020-12）を同梱し、ISO／SOC 2 監査証跡やクライアント報告書にそのまま使えます。
- [ふたりの家計簿 — Sakura Duo 版｜二人暮らしの割り勘を自動精算するスプレッドシート](https://aulvem.com/ja/products/futari-kakeibo/): 二人暮らし向けの家計簿テンプレート（桜色のパステル配色）。共有支出と個人支出を区分し、50:50や70:30など負担割合のカスタム×自動精算で「誰がいくら払えばいいか」を毎月自動計算。12カテゴリ×12か月の入力欄と年間サマリーを備え、Excel と Google スプレッドシート両対応です。
- [Airline pet policies for Japan-outbound travel — sourced reference dataset](https://aulvem.com/products/pet-airlines/): Cabin, checked-baggage, and cargo pet policies for 10 international airlines on Japan-outbound routes: weight and carrier limits, brachycephalic breed restrictions, required documents and fees. Each record carries a source URL, a verification date, and a confidence rating.
- [Cross-border product recall dataset — cosmetics, baby, and food (US / EU / Japan)](https://aulvem.com/products/recall-radar/): Thirty product recalls across cosmetics, baby products, and food from four authorities — US CPSC and FDA, the EU Safety Gate, and Japan's Consumer Affairs Agency. Each record carries the official recall ID, hazard type, remedy, a source URL, and an append-only timeline with verification dates.
- [日本発のペット同伴フライト、航空会社別ポリシーの出典付きデータセット](https://aulvem.com/ja/products/pet-airlines/): 日本発の国際線 10 社について、客室・受託手荷物・貨物それぞれのペット輸送ポリシーをまとめたデータセット。重量とケージ寸法の上限、短頭種の制限、必要書類、料金を整理し、各レコードに出典 URL・確認日・信頼度を付けています。
- [越境のリコール情報データセット — 化粧品・ベビー・食品（米 / EU / 日本）](https://aulvem.com/ja/products/recall-radar/): 化粧品・ベビー用品・食品のリコール 30 件を、米 CPSC・FDA、EU Safety Gate、日本の消費者庁という 4 当局から収集したデータセット。各レコードに公式リコール ID・危険区分・対処法・出典 URL と、確認日つきの追記型タイムラインを収録しています。

## Blog categories

- [Build](https://aulvem.com/blog/build/): Design, build, ship and improve logs of the products — with the technical notes and coding fundamentals that came up along the way.
- [Reviews](https://aulvem.com/blog/reviews/): Reviews of development tools, books, AI services and gear actually used, with usage duration and setup made explicit.

## Featured posts

- [How Rakuten's API hides the JAN, and the 3-tier cross-marketplace match](https://aulvem.com/blog/2026-06-27-rakuten-jan-cross-matching/): Rakuten's API doesn't return the JAN; Yahoo! looks it up via jan_code. I split product identity into three tiers — JAN match (scored confirmed/review/discard), name fuzzy match (candidates plus user confirmation), and no match (single-store alerts only) — and only the certain tiers feed cross-marketplace comparison and notifications, which is what keeps wrong merges from firing.
- [How I compute the real, point-inclusive price — design notes from a 3-layer model](https://aulvem.com/blog/2026-06-15-point-inclusive-effective-price/): An effective price is 'display price minus points', but making it trustworthy takes design. Split points into three certainty layers — confirmed, conditional, assumed. Rank on the confirmed layer only, show conditional and assumed as a range, floor each layer before summing, and leave shipping out because no marketplace API returns it.
- [Generating llms.txt and llms-full.txt in Astro for a Bilingual Site](https://aulvem.com/blog/2026-06-14-aulvem-llms-txt-multilingual/): llms.txt can be generated from Content Collections as an Astro API route with no manual upkeep. Aulvem uses one renderer with two axes — filterLang (which posts to list) and docLang (the heading language) — to emit /llms.txt, /ja/llms.txt and /llms-full.txt from the same logic.
- [Emitting reciprocal hreflang only when both languages exist — Aulvem's i18n customisation](https://aulvem.com/blog/2026-05-30-aulvem-i18n-hreflang-reciprocal/): Astro 5's i18n routing doesn't emit hreflang, and a naive implementation broadcasts 404 URLs as alternates. Aulvem walks Content Collections to detect which languages actually have the entry, then emits `<link rel="alternate" hreflang>` conditionally from Seo.astro. Reciprocal + existence checks together keep the signal clean.
- [Reading sitemap lastmod from MDX frontmatter — customising Astro's sitemap integration](https://aulvem.com/blog/2026-05-25-aulvem-sitemap-lastmod/): @astrojs/sitemap won't read updatedDate from MDX frontmatter. Aulvem walks the blog folder in astro.config.mjs, builds a path-to-date map with lightweight regex, and feeds it into serialize. Paginated noindex pages are filtered out in the same pass — sending them in the sitemap would contradict the noindex meta.
- [Pushing operational rules into Astro Content Collections with Zod](https://aulvem.com/blog/2026-05-23-aulvem-zod-schema-enforcement/): Aulvem enforces blog rules through the Zod schema in Astro Content Collections. `.refine()` couples reviews to affiliate, howto/faq objects are typed in frontmatter, and a grep validator catches body/JSON-LD parity. What schema can't reach drops to lint and then to review.
- [How this blog is built — Aulvem on Astro 5 and Content Collections](https://aulvem.com/blog/2026-05-17-aulvem-blog-architecture/): Aulvem is built on a minimal stack of Astro 5 + MDX + Content Collections + Cloudflare R2. The frontmatter Zod schema and rehype plugins push the kind of operational rules a writer tends to forget into build-time checks. The overview hub — individual decisions are split into follow-up posts.

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