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stippiMCP SERVER

Code Assistant by stippi

An open-source coding agent in Rust with a native GUI that shows you what each tool actually returned to the model — and a headless mode that plugs into Claude Desktop as an MCP server.

Code Generation, Scaffolding & MigrationCommunity

LABSCO SUMMARY

It shows its work, and it survives format-on-save.

Two things here come from real annoyance rather than a feature list. The UI prints what each tool actually returned to the model, which is the only way to diagnose an agent that has quietly drifted. And the format-on-save reconciliation fixes a failure mode almost nobody handles: your formatter rewrites the file, the model's search block no longer matches, and every subsequent edit fails for a reason that looks like nothing.

What it is

An autonomous coding agent that reads, searches, edits and runs commands over your codebase, written in Rust and shipping four ways to use it: a native GUI built on Zed's GPUI, a terminal mode, an ACP agent for editors like Zed, and a headless MCP server for clients like Claude Desktop.

What you get

  • A UI that shows which tools ran and what each handed back as context, instead of a collapsed "called 5 tools" — when the agent goes wrong you can see where
  • File edits reconciled with your formatter: when a project auto-formats on save, the agent's picture of a file goes stale and later edits fail for non-obvious reasons; it runs the formatter and reconciles the model's own edits against the result without re-reading the file — replace_in_file, write_file
  • File reads that preserve encoding, BOM and CRLF/LF, giving the model clean text and writing it back the way it was stored
  • Documents as first-class input — Word, Excel, PowerPoint and PDF are consumed as Markdown, so the agent can work from a spec alongside the source
  • Command execution and directory listing under permission tiers and a command sandbox — execute_command, list_files
  • Optional web search through perplexity_ask, enabled by setting perplexity_api_key
  • Streaming with filtering that blocks unsafe tool combinations, such as editing a file the model has not read
  • Sub-agents, per-project sessions with branching and persistent state, and automatic context compaction when the window fills
  • MCP client mode as well as server mode — it can consume other MCP servers' tools while exposing its own
  • Adaptive tool syntax chosen per session — native function calling, XML tags or triple-caret blocks — to fit the model in use

Requirements

A prebuilt binary from the Releases page for macOS (Apple Silicon or Intel), Linux or Windows — no toolchain needed. On first launch it opens a Settings screen where you pick a provider, paste an API key and choose a model. Building from source needs the Rust toolchain, plus the gpui system libraries on Debian/Ubuntu and the Metal toolchain on macOS; the binary lands at target/release/code-assistant. For MCP, point your client at the binary with the server argument. Providers include Anthropic, OpenAI, Google Vertex AI, Ollama, OpenRouter, SAP AI Core, Groq, Cerebras and Mistral.

Setup effort

One command plus a key — code-assistant server, then supply credentials

See installation options