A native Mac app that makes AI agents do their homework

What it does

RepoPrompt CE is a native macOS app that assembles the exact codebase context—files, CodeMaps, repository structure, Git diffs, and line slices—that you feed to AI coding agents. It wraps this curation in a Swift-native interface and bundles an MCP server so external CLI agents and compatible clients can search, inspect, and orchestrate work through the same context layer. The goal is to let you review what the agent sees before the agent acts, rather than praying a giant prompt dump lands correctly.

The interesting bit

Most agent tools hide the prompt; RepoPrompt CE treats the context itself as a first-class, reviewable artifact with a token budget. It also builds an agent harness around its own MCP server, turning a native macOS app into a control panel for local CLI-backed coding agents. That is a slightly unusual architecture—usually the MCP server is the whole product, not a windowed Mac app with a GUI.

Key highlights

• Native Swift macOS app, not a browser tab or IDE plugin.
• Assembles reviewable prompts from file trees, CodeMaps, line slices, and Git diffs.
• Built-in MCP server bridges repository context to external CLI agents and compatible clients.
• Context Builder lets an agent explore the repo and curate files within a token budget before the real session starts.
• Supports multi-root workspaces across related repositories and documentation folders.

Caveats

• Requires macOS 26 or later, so it is strictly for the bleeding-edge Apple ecosystem.
• The README identifies this as a “community edition” but does not clarify which features, if any, are withheld from the paid version.

Verdict

Worth a look if you are a Mac developer who distrusts black-box agent prompts and wants a native UI to curate, review, and hand off context. Skip it if you are not on macOS 26 or if you prefer your agents to ingest entire repos raw.