Cortex Agent

Documentation: daniquir.github.io/cortex

VS Code extension that sits on top of OpenCode and adds a local codebase context layer — the piece that makes Cursor/Windsurf feel sharp.

OpenCode = agent runtime · Cortex = retrieval + IDE UX

Installation

VS Code Marketplace

Install from the Marketplace or run:

code --install-extension cortex-labs.cortex-agent

Or search Cortex Agent in the Extensions panel.

Open VSX (Cursor / Windsurf / VSCodium / forks)

Open VSX — cortex-labs.cortex-agent

ovsx install cortex-labs.cortex-agent

Requirements

VS Code 1.100+ (or a compatible fork)
OpenCode CLI on your PATH (or set cortex.opencodeBinary)
A configured OpenCode provider (opencode auth login / /connect)

Features

Sidebar chat with streaming replies via OpenCode
Local workspace indexing with smart retrieval (lexical + optional embeddings)
Context preview before the agent runs
Session history, undo turn, and per-file Keep / Undo / Review diffs
Permission and question approval UI
Ghost-text autocomplete and Inline Edit
@-mentions and /slash commands

Full docs: Installation · Configuration · Architecture

Beta

Early-access builds expire after a limited period (typically ~30 days from release). Near the end you get a warning; after expiration the extension asks you to update from the Marketplace or Open VSX.

Settings

Setting	Default	Meaning
`cortex.opencodeBinary`	`opencode`	Path to the OpenCode CLI
`cortex.opencodePort`	`4096`	Port for `opencode serve`
`cortex.context.topK`	`8`	Chunks injected per prompt
`cortex.context.maxChars`	`12000`	Context budget
`cortex.context.embeddings`	`hash`	`hash` (offline) or `minilm`
`cortex.context.chunkMode`	`symbols`	`symbols` or `lines`
`cortex.agent`	`build`	OpenCode agent for chat
`cortex.autocomplete.enabled`	`true`	Ghost-text autocomplete
`cortex.autocomplete.debounceMs`	`350`	Pause before a suggestion

See the configuration docs for the full list.

Support

Docs: daniquir.github.io/cortex
Issues: github.com/daniquir/cortex/issues

License

Cortex Agent is proprietary software. Source code is not open source and is not licensed for public redistribution. Use of the packaged extension is subject to the terms of the VS Code Marketplace / Open VSX listing and the LICENSE file.

OpenCode is a separate project under its own license. Cortex Agent is an independent product.