NeNe series: self-hosted business tools for small teams in Japan

Hideyuki Mori announced the NeNe series of open-source business tools, built on his NENE2 PHP 8.4 micro-framework [Dev.to article]. The series includes five distinct products: NENE2, NeNe Invoice, NeNe Vault, NeNe Deal, NeNe Contact, and NeNe Records [GitHub NENE2].

The NeNe series provides the following tools:

• NENE2: a PSR-style HTTP runtime with explicit routing, Problem Details error responses, OpenAPI contracts, auth middleware, and optional front-end starter patterns.
• NeNe Invoice: a self-hosted quote and invoice manager that handles qualified invoices, PDF generation, payment reconciliation, and Japanese bank CSV formats.
• NeNe Vault: a document archive for PDFs, receipts, and contracts with searchable audit history and retention-oriented workflows.
• NeNe Deal: a B2B pipeline tool tracking opportunities, stages, forecasts, and exporting draft client data to NeNe Invoice.
• NeNe Contact: an embeddable contact form with operator inbox, status management, and notification routing.
• NeNe Records: a typed CMS that lets users define entity types, fields, and public pages, all exposed via OpenAPI and MCP-ready endpoints.

All components expose their public API through OpenAPI specifications, making them consumable by both human developers and AI agents [Dev.to article].

The NeNe series matters because it shows that PHP 8.4 can deliver modern, typed, API-first services without heavyweight dependencies. Each tool natively supports qualified invoices, Japanese bank CSV imports, and bilingual admin screens, eliminating the need for costly localization layers. The explicit HTTP contract forces AI agents to interact through documented endpoints, reducing the attack surface for AI-driven automation [GitHub NENE2].