Pier

Pier is a terminal-native, agentic coding assistant designed to accelerate development workflows by automating routine tasks, explaining complex codebases, and managing Git operations. Written in TypeScript and running on Bun, it provides an interactive REPL and headless execution capabilities with built-in sandbox security.

Pier is a terminal-native, agentic coding assistant designed to accelerate development workflows by automating routine tasks, explaining complex codebases, and managing Git operations. Written in TypeScript and running on Bun, it provides an interactive REPL and headless execution capabilities with built-in sandbox security.

• 01Interactive terminal REPL with readline composer and streaming assistant output
• 02OS-level sandboxing (macOS seatbelt/Linux bubblewrap) for secure command execution
• 03Project-aware memory using CLAUDE.md/AGENTS.md for context-specific conventions
• 04Multi-mode permission system including plan, auto, and accept-edits modes
• 05Support for subagents, Model Context Protocol (MCP), and custom skill bundles
• 06Thread persistence and sync across devices with local-only mode options