What is castle-hud?
castle-hud is a Claude Code mod by eddywong888 that a Castlevania-style HUD above the prompt in the Claude Code desktop app. It shows how full the context is (a blood meter), your 5-hour and weekly limits (moons), how long the prompt cache. It is listed under Cost & usage and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | eddywong888 |
| Repository | eddywong888/claude-castle-mod |
| Popularity | no public popularity data yet |
| Category | Cost & usage |
| Security | Low risk (96/100) |
| Rank | #3,128 of 5,272 Claude Code mods; #559 in Cost & usage |
| Last commit | 2026-10-11 |
| Hooks | 12 events |
| Sees | Bash calls, classic hooks, compaction, every tool call, subagent spawns |
| Draws on | AbovePrompt |
Is castle-hud safe to install?
castle-hud 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 |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| No license detected | Note |
API calls in its code
| Call | What it means |
|---|---|
$.agent.list | |
$.audio.play | plays audio |
$.clock.every | |
$.clock.now | |
$.command.register | |
$.session.authorize | reads the transcript |
$.session.id | |
$.session.surfaces | |
$.session.usage | |
$.state.get | |
$.state.set | |
$.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.resolve | draws interface |
$.ui.toast | draws interface |
How do I install castle-hud?
- 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/eddywong888/claude-castle-mod claude plugin validate ./claude-castle-mod/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add eddywong888/claude-castle-mod && claude plugin install castle-hud@claude-castle-mod
Or ask Claude to set it up
Paste this into Claude Code and it installs castle-hud for you:
Install the "castle-hud" Claude Code mod from https://github.com/eddywong888/claude-castle-mod. Run claude plugin validate on it first and show me what it can access before you enable it.