Claude Code mod

runtime

harnist runtime mod — per-role subagent loading: trims skill list, MCP notes and CLAUDE.md per subagent type, enforces spawn rules and tool bans

3 starsMemory & instructions mods Plugin marketplaceValidates on Claude Code 2.1.319 Source

Install

Inside Claude Code
/plugin marketplace add Dominic-DK/harnist
/plugin install runtime@harnist

Mods install like plugins. Run /reload-plugins or start a new session to load it.

What it can access

Reach
L1Reads: reads files, reads env vars
Sees
subagent spawns
Hooks
session.startcommand.runagent.spawnprompt.attachmenttool.check

From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.

How Claude Code mods work

  • A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
  • It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
  • Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
  • Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Claude Code docs

Details

Folder
runtime
Marketplace
harnist
Author
Dominic Lee
License
MIT
Last updated
28 October 2026

FAQ

What is runtime?

harnist runtime mod — per-role subagent loading: trims skill list, MCP notes and CLAUDE.md per subagent type, enforces spawn rules and tool bans It is a mod for Claude Code, from Dominic-DK/harnist on GitHub.

What can the runtime mod access?

Its widest reach is "reads" (reads files, reads env vars). It sees subagent spawns. Like any mod, it runs with your permissions.

How do I install runtime?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add Dominic-DK/harnist and then /plugin install runtime@harnist.

Is runtime popular?

Dominic-DK/harnist has 3 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 28 October 2026.

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