Claude Harness
Visualize and edit your Claude Code harness in VS Code: memory, rules, agents, skills, commands, output styles, workflows, hooks, MCP servers and plugins, globally and per repository.
Quick start
- Open the Extensions view (Ctrl+Shift+X), search for Claude Harness, and click Install. You can also run
code --install-extension integrations-at.claude-harness in a terminal.
- Click Claude Harness in the status bar, or its icon in the activity bar. The main window opens.
- Pick an item in the sidebar to view and edit it. The global harness is read from
~/.claude.
Note: Claude Harness needs Claude Code and VS Code 1.100 or newer. The global MCP server list comes from claude mcp list, so the claude command must be on your PATH.
Features
| Feature |
Summary |
| Main window |
Browses the global harness and each repository in one window, with search and an overview |
| Harness kinds |
The eleven kinds of harness items, where they are stored and which ones you can change |
| Editing |
Edits frontmatter and instructions, saves or reverts, and creates, renames, duplicates or deletes items |
| Repositories |
Shows the harness of each repo, and adds or removes repos |
| Configure Tools |
Picks the tools an agent, skill or command may use |
| MCP servers |
Lists MCP servers with their source and status, sorts them, shows their tools, and adds, copies or deletes them |
| MCP switches |
Turns an MCP server on or off for one repo or in every folder |
| Plugins |
Enables, disables, installs and uninstalls plugins, and marks mods |
| Settings |
Sets the global harness folder and the repo lists the extension keeps, and edits the settings files |
| Commands |
Every Claude Harness command, what it does and where to find it |
License
Creative Commons Attribution-NonCommercial-ShareAlike 4.0, (c) 2026 Alexander Kastil, integrations.at. See LICENSE.
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