What is cost-guard?
cost-guard is a Claude Code mod by sfrodilla that watches session and daily spend, warns when the context grows large, and holds a prompt once when the prompt cache has expired on a big context. It is listed under Security and has 1 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | sfrodilla |
| Repository | sfrodilla/claude-code-mods |
| Popularity | 1 GitHub stars |
| Category | Security |
| Security | Low risk (88/100) |
| Rank | #2,296 of 5,272 Claude Code mods; #273 in Security |
| License | Apache-2.0 |
| Last commit | 2026-10-07 |
| Hooks | 4 events |
| Sees | every prompt |
| Draws on | nothing |
Is cost-guard safe to install?
cost-guard scores 88/100 on the MCPMods security check: Low risk. Things to review: watches every prompt or event. 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 |
| Watches every prompt or event | Review |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.after | |
$.clock.every | |
$.clock.now | |
$.command.register | |
$.prompt.fill | writes the prompt box |
$.session.model | |
$.session.usage | |
$.store.delete | keeps its own state |
$.store.get | keeps its own state |
$.store.keys | keeps its own state |
$.store.set | keeps its own state |
$.ui.status | draws interface |
$.ui.toast | draws interface |
How do I install cost-guard?
- 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/sfrodilla/claude-code-mods claude plugin validate ./claude-code-mods/cost-guard
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add sfrodilla/claude-code-mods && claude plugin install cost-guard@sfrodilla-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs cost-guard for you:
Install the "cost-guard" Claude Code mod from https://github.com/sfrodilla/claude-code-mods/tree/main/cost-guard. Run claude plugin validate on it first and show me what it can access before you enable it.
More from sfrodilla/claude-code-mods
This repository has 2 Claude Code mods on MCPMods.
- pre-push-review: Reviews unpushed commits against REVIEW_GUIDELINES.md before Claude runs git push (Low risk)