02 · ide-extension · 10 systems
IDE extensions & copilotsAgents that live inside the editor you already run.
IDE extensions add completion, chat, and agent modes to an existing editor — VS Code, JetBrains, Neovim — through the editor's plugin system. They range from vendor copilots to open-source, bring-your-own-key agents.
Systems in this category
GitHub Copilot
GitHub · ide-extension
GitHub Copilot is the GitHub-native coding assistant: completions, chat, agent mode, and PR coding agents across many IDEs.
Cline
Community / OSS · ide-extension
Cline is an open-source VS Code agent that plans, edits, and runs tools with BYOK models and approval controls.
Amazon Q Developer
Amazon Web Services · ide-extension
Amazon Q Developer (formerly CodeWhisperer) is AWS's coding assistant with IDE and CLI agents plus Java/.NET transformation.
Gemini Code Assist
Google · ide-extension
Gemini Code Assist is Google's per-seat coding assistant for IDEs and Google Cloud workflows, now sold only as Standard and Enterprise.
Sourcegraph Cody
Sourcegraph · ide-extension
Sourcegraph Cody is a codebase-aware assistant powered by Sourcegraph's code graph, now enterprise-focused.
Augment Code
Augment Code · ide-extension
Augment Code is a context-engine coding agent for large codebases, available in VS Code, JetBrains, and a CLI (Auggie), priced as one flat team plan.
Continue
Community / OSS · ide-extension
Continue was an open-source IDE assistant for chat, edit, and agent workflows; Cursor acqui-hired the team in June 2026 and the standalone product was wound down.
Roo Code
Roo Code Inc. · ide-extension
Roo Code was an open-source VS Code coding agent; the extension shut down on May 15, 2026 and the repository is read-only.
Kilo Code
Kilo · ide-extension
Kilo Code is an open-source agentic platform — VS Code/JetBrains extension, CLI, Slack, and cloud agents over a shared OpenCode engine. Started as a Roo Code fork and became the main migration path after Roo's May 2026 shutdown.
Junie
JetBrains · ide-extension
Junie is JetBrains' coding agent — inside JetBrains IDEs (Junie Local in AI Chat) and as a terminal CLI. GA since June 2026, with agentic debugging that drives the IDE's real debugger, breakpoints included.
Who it's for
Teams that can't or won't switch editors, enterprises with policy/SSO requirements, and anyone who wants to control model cost with their own API keys.
Tradeoffs
Extensions are bounded by the host editor's plugin API. Open-source ones give control and BYOK pricing but shift model billing and maintenance risk to you.
Frequently asked
What is an IDE extension?
IDE extensions add completion, chat, and agent modes to an existing editor — VS Code, JetBrains, Neovim — through the editor's plugin system. They range from vendor copilots to open-source, bring-your-own-key agents.
Who should use an IDE extension?
Teams that can't or won't switch editors, enterprises with policy/SSO requirements, and anyone who wants to control model cost with their own API keys.
What are the tradeoffs of IDE extensions?
Extensions are bounded by the host editor's plugin API. Open-source ones give control and BYOK pricing but shift model billing and maintenance risk to you.
Which IDE extensions are in the catalog?
10 as of 2026-09-25: GitHub Copilot (GitHub), Cline (Community / OSS), Amazon Q Developer (Amazon Web Services), Gemini Code Assist (Google), Sourcegraph Cody (Sourcegraph), Augment Code (Augment Code), Continue (Community / OSS), Roo Code (Roo Code Inc.), Kilo Code (Kilo), Junie (JetBrains).
What is a coding copilot or IDE extension?
A plugin that adds AI completion, chat, and increasingly agent modes (plan → edit → run) to an editor you already use, without replacing the editor.
What does BYOK mean for coding agents?
Bring your own key: you supply API credentials for the model provider (or a router like OpenRouter) and pay usage directly. Cline, Kilo Code, and other open extensions work this way.
Which IDE extensions are open source?
In the current seed: Cline and Kilo Code are open source. Continue was, but was acquired by Cursor and retired in June 2026; Roo Code was open source but shut down in May 2026 and is listed as deprecated.