Claude Code mod

assumption-check

After a turn that edited files or ran commands, Haiku lists the choices Claude made that you did not state. Mark each right or wrong, add a note, and send the corrections back as one prompt. Starts off: /assumption-check on turns it on

3 starsMemory & instructions mods Plugin marketplaceValidates on Claude Code 2.1.316 Source

Install

Inside Claude Code

/plugin marketplace add vumichien/claude-code-mods-kit
/plugin install assumption-check@chien-mods

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

What it can access

Reach: L2Writes or runs: drives Claude, writes the prompt box, reads the transcript, reads the prompt box, reads mod state, persists state, draws
Sees: every tool call
Draws in: AbovePromptPane
Hooks: session.startcommand.runturn.starttool.callturn.completeui.closeui.render

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

Repository: vumichien/claude-code-mods-kit
Folder: plugins/assumption-check
Marketplace: chien-mods
Author: Chien Vu Minh
Type: Memory & instructions mods
License: MIT
Last updated: 10 October 2026
Listed in: awesome-claude-code-mods

FAQ

What is assumption-check?

What can the assumption-check mod access?

Its widest reach is "writes or runs" (drives Claude, writes the prompt box, reads the transcript, reads the prompt box, reads mod state, persists state, draws). It sees every tool call. It draws in AbovePrompt, Pane. Like any mod, it runs with your permissions.

How do I install assumption-check?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add vumichien/claude-code-mods-kit and then /plugin install assumption-check@chien-mods.

Is assumption-check popular?

vumichien/claude-code-mods-kit has 3 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 10 October 2026.

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