What is assumption-check?
assumption-check is a Claude Code mod by vumichien that 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. It is listed under Interface and has 2 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | vumichien |
| Repository | vumichien/claude-code-mods-kit |
| Popularity | 2 GitHub stars |
| Category | Interface |
| Security | Low risk (96/100) |
| Rank | #1,418 of 5,272 Claude Code mods; #557 in Interface |
| License | MIT |
| Last commit | 2026-10-10 |
| Hooks | 7 events |
| Sees | every tool call |
| Draws on | AbovePrompt, Pane |
Is assumption-check safe to install?
assumption-check scores 96/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 7 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts no processes | Pass |
| Writes no files or config | Pass |
| Doesn't read environment variables | Pass |
| Only sees the events it hooks | Pass |
| Drives Claude (model calls, prompts) | Note |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.after | |
$.command.register | |
$.model.complete | drives Claude |
$.prompt.fill | writes the prompt box |
$.prompt.read | |
$.prompt.submit | drives Claude |
$.session.messages | reads the transcript |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.close | draws interface |
$.ui.open | draws interface |
$.ui.panes | draws interface |
$.ui.resolve | draws interface |
How do I install assumption-check?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/vumichien/claude-code-mods-kit claude plugin validate ./claude-code-mods-kit/plugins/assumption-check
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add vumichien/claude-code-mods-kit && claude plugin install assumption-check@chien-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs assumption-check for you:
Install the "assumption-check" Claude Code mod from https://github.com/vumichien/claude-code-mods-kit/tree/main/plugins/assumption-check. Run claude plugin validate on it first and show me what it can access before you enable it.
More from vumichien/claude-code-mods-kit
This repository has 8 Claude Code mods on MCPMods.
- context-meter: A band above the prompt with what fills the context window, by category, a countdown to when the prompt cache expires, a (Low risk)
- done-gate: Notices when Claude marks a task done while code it changed has not been tested since, and tells Claude and you; a band (Low risk)
- idea-shelf: Park an idea while Claude works, without interrupting it: /idea , or the shelf's own box. Ideas are kept per project acr (Low risk)
- plan-meter: A band above the prompt with how far your plan file is (phases and steps done, what is in progress, what is next) and Cl (Low risk)
- prompt-enhancer: An Enhance button above the prompt: Haiku rewrites your draft to name the skills that fit, the questions Claude should a (Low risk)
- secret-guard: Hides secrets in tool results before Claude reads them: the secret values of every .env and .env.* from your session's f (Low risk)
- session-monitor: See your other Claude Code sessions from this one: which are working, which wait for you, which are done, and which shar (Review before installing)