What is catalyst-probes?
catalyst-probes is a Claude Code mod by TransmuteLabs that consultation and prompt engine for Claude Mods. The module is the core; [probe.] tables in probes.toml are the consultants and [prompt.] tables author a system-prompt section, a tool. It is listed under Interface and has 3 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | TransmuteLabs |
| Repository | TransmuteLabs/Catalyst |
| Popularity | 3 GitHub stars |
| Category | Interface |
| Security | High risk (52/100) |
| Rank | #1,029 of 5,272 Claude Code mods; #400 in Interface |
| Last commit | 2026-10-06 |
| Hooks | 39 events |
| Sees | classic hooks, every tool call, subagent spawns, the system prompt |
| Draws on | nothing |
Is catalyst-probes safe to install?
catalyst-probes scores 52/100 on the MCPMods security check: High risk. Things to review: starts processes outside the sandbox; writes files or config; reads environment variables. It passed 2 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 processes outside the sandbox | Review |
| Writes files or config | Review |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Drives Claude (model calls, prompts) | Note |
| Validator reported problems | Note |
| No license detected | Note |
API calls in its code
| Call | What it means |
|---|---|
$.agent.list | |
$.clock.after | |
$.clock.every | |
$.clock.now | |
$.clock.sleep | |
$.command.register | |
$.env.get | reads env vars |
$.fs.list | reads files |
$.fs.read | reads files |
$.fs.stat | reads files |
$.fs.write | writes files |
$.model.complete | drives Claude |
$.process.run | runs processes |
$.prompt.submit | drives Claude |
$.session.id | |
$.session.messages | reads the transcript |
$.store.delete | keeps its own state |
$.store.get | keeps its own state |
$.store.keys | keeps its own state |
$.store.set | keeps its own state |
$.tool.register | drives Claude |
$.ui.log | draws interface |
How do I install catalyst-probes?
- 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/TransmuteLabs/Catalyst claude plugin validate ./Catalyst/plugins/catalyst-probes
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add TransmuteLabs/Catalyst && claude plugin install catalyst-probes@catalyst
Or ask Claude to set it up
Paste this into Claude Code and it installs catalyst-probes for you:
Install the "catalyst-probes" Claude Code mod from https://github.com/TransmuteLabs/Catalyst/tree/main/plugins/catalyst-probes. Run claude plugin validate on it first and show me what it can access before you enable it.
More from TransmuteLabs/Catalyst
This repository has 4 Claude Code mods on MCPMods.
- catalyst-refusal-watch: Makes every response the service filter stopped visible at once and adds a rule: report it, do not drop work silently. (Low risk)
- catalyst-statusline: Multi-line status HUD above the prompt over data families (hooks/data/*.ts pure collectors, one core subscription per ev (High risk)
- catalyst-swe-request: Request-text policy for devin/swe-2: registers one rule in the host's $.requestText noun. (Low risk)