Introduction

JeikCode is a full-featured, high-performance AI Coding Agent designed for professional software engineers. Built from the ground up in Rust, it delivers lightning-fast responsiveness and minimal resource usage, providing a unified developer ecosystem spanning rich terminal TUI, modern browser WebUI, desktop apps, and headless daemon services.

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Why JeikCode?

1. Ultra-Lightweight Native Speed

Unlike heavy Node/Electron-based coding assistants, JeikCode's core runtime is written in Rust. It has a tiny memory footprint, launches in milliseconds, and remains silky smooth even under intense multi-turn, multi-file refactoring sessions.

2. Multi-Interface Unified Experience

• Interactive TUI: A responsive terminal interface with syntax-highlighted diffs, tool execution cards, and keyboard shortcuts.
• Embedded WebUI: Type /webui in your terminal to instantly launch a local web interface with live bi-directional sync, drag-and-drop image uploads, and visual model management.
• Desktop Shell: Lightweight desktop application powered by Tauri 2.0.
• Background Daemon: Headless service with SSE and HTTP endpoints for CI/CD pipelines and remote workspaces.

3. Decoupled Provider & Model Architecture

JeikCode decouples provider accounts (API keys, base URLs, credentials) from model specifications (reasoning effort, context window, vision support). Developers can map multiple distinct model behaviors to a single account or seamlessly switch between local and cloud providers.

4. Advanced Tooling & Extensibility

• CodeIntel Graph: Semantic code search enhanced by a bilingual thesaurus that bridges cross-language concepts and builds symbol call graphs.
• Model Context Protocol (MCP): Native support for standard MCP servers to connect external databases, browser automation, search engines, and enterprise APIs.
• Dynamic Skills & Hooks: Automated lifecycle hooks and reusable prompt workflow packages.

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Core Design Principles

1. Context Immutability & KV Cache Optimization: Strict append-only prefixes guarantee high server-side prompt caching hit rates, cutting latency and API costs significantly.
2. Subagent Parallelism: Concurrently dispatches read-only explore subagents and scoped worker subagents to divide and conquer large codebases.
3. Safety & Permission Gates: Destructive shell commands and broad file rewrites require explicit user approval.