What is prompt-shield?
prompt-shield is a Claude Code mod by boxiaolanya2008 that strip invisible fingerprint characters from outgoing prompts and audit what the model actually receives. It is listed under Security and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | boxiaolanya2008 |
| Repository | boxiaolanya2008/claudecode-plus-mod |
| Popularity | no public popularity data yet |
| Category | Security |
| Security | Review before installing (61/100) |
| Rank | #2,760 of 5,272 Claude Code mods; #318 in Security |
| Last commit | 2026-10-07 |
| Hooks | 0 events |
| Sees | only the events it hooks |
| Draws on | nothing |
Is prompt-shield safe to install?
prompt-shield scores 61/100 on the MCPMods security check: Review before installing. Things to review: validator reported problems. It passed 6 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 |
| Validator reported problems | Flag |
| No license detected | Note |
How do I install prompt-shield?
- 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/boxiaolanya2008/claudecode-plus-mod claude plugin validate ./claudecode-plus-mod/mods/prompt-shield
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add boxiaolanya2008/claudecode-plus-mod && claude plugin install prompt-shield@claudecode-plus-mod
Or ask Claude to set it up
Paste this into Claude Code and it installs prompt-shield for you:
Install the "prompt-shield" Claude Code mod from https://github.com/boxiaolanya2008/claudecode-plus-mod/tree/master/mods/prompt-shield. Run claude plugin validate on it first and show me what it can access before you enable it.
More from boxiaolanya2008/claudecode-plus-mod
This repository has 6 Claude Code mods on MCPMods.
- plus: All claudecode-plus-mod Mods in one install: prompt-shield, cache-guard, human-tone, clear-intent and agent-charter. (Review before installing)
- agent-charter: Pin an agent charter into the system prompt: skills-first workflow, per-language comment standards, commit format and br (Review before installing)
- cache-guard: Stabilize the prompt-cache prefix, audit compaction fidelity, and report real cache hit numbers per turn. (Review before installing)
- clear-intent: Attach an intent protocol to every prompt: restate the goal, separate confirmed from assumed, ask before acting on vague (Review before installing)
- human-tone: Pin a house style into the system prompt: direct, human answers with no filler praise or over-formatting. (Review before installing)