Show HN: VT Code – Rust TUI coding agent with multi-provider support

Apr 25, 2026 · coding ai systems · Source ↗

TLDR

Open-source Rust TUI coding agent with semantic code understanding, multi-provider LLM failover, and a defense-in-depth security sandbox.

Supports 12+ LLM providers (OpenAI, Anthropic, Gemini, DeepSeek, Ollama, LM Studio, GitHub Copilot, OpenRouter, and more) with automatic failover.
Semantic grep layer uses ripgrep + ast-grep for language-level code understanding; Ghostty VT runtime handles PTY snapshots with fallback to legacy_vt100.
Security model layers tree-sitter-bash command validation, per-command argument allowlists, and OS-native sandboxing (macOS Seatbelt, Linux Landlock + seccomp).
Implements A2A protocol, ACP for Zed integration, Anthropic Messages API compatibility, and ATIF v1.4 trajectory export for SFT/RL pipelines.
Skills system follows the open Agent Skills standard; background subagents are opt-in via vtcode.toml [subagents.background] config block.