GENSHI AI Adopts CEO's Rust Editor necoder For In-House Development
GENSHI AI has introduced necoder, a Rust-based code editor written by representative director Daichi Nagashima and released as open source, into its in-house development.
1 source 6d ago
Reporting from 1 source: ASCII.jp.
Why it matters
A small medical AI company now builds its own development tool to run many agents at once, and the measured memory gap against Cursor is the argument it is publishing alongside the source code.
Key Facts
- GENSHI AI introduced necoder, an open-source code editor written in Rust, into its in-house software development.
- Representative director Daichi Nagashima began developing necoder in July 2026 and released the first version in August.
- necoder supports multiple AI agents including Codex and GitHub Copilot through the Agent Client Protocol.
- GENSHI AI measures about 96 percent lower memory use than Cursor at idle and about 88 percent lower while Claude Code runs.
- In September, Nagashima migrated completely from Cursor to necoder.
The editor runs multiple AI agents in parallel, including Codex and GitHub Copilot, and connects to vendor APIs such as DeepSeek. Against Cursor under the same conditions, GENSHI AI measures about 96 percent lower memory use at idle and about 88 percent lower while an agent runs.
Nagashima began writing necoder in July 2026, released a first version in August, and moved off Cursor entirely in September. In-house engineers now use it for daily work. The editor is built on the Agent Client Protocol, so existing agent subscriptions carry over and no separate necoder API key is needed. Templates cover DeepSeek, GLM, Kimi, Qwen, MiniMax, Xiaomi MiMo, OpenRouter, and Ollama, and any OpenAI- or Anthropic-compatible API can be added.
The problem it addresses is window sprawl. Nagashima runs 10 or more projects in parallel, and Electron-based editors use more memory with each window opened.
Written with AI by Yomimono from the 1 cited source below, including Japanese-language reporting where cited. See our editorial policy.
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