tophant-clawvault-mask-project

tophant-clawvault-mask-project is a skill for Claude Code from tophant-ai/ClawVault. It costs 17 tokens per session (790 once invoked), scanned A, original, MIT.

A document-sanitizing workflow for checking company or project files and replacing sensitive business details with non-reversible placeholders before analysis.

In plain words
What is it for?
Use it to generate a masking policy and sanitize a specified company or project document before another tool analyzes it.
Why use it?
It prevents private information from being exposed during analysis and ensures the original file is not used directly.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Good fit Use it to generate a masking policy and sanitize a specified company or project document before another tool analyzes it.

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Install with agentmods
npx agentmods add skills/tophant-ai/clawvault/tophant-clawvault-mask-project
About the project

ClawVault is a security vault for controlling how AI agents access private files, credentials, API keys, and other sensitive data. It is for people who want to monitor agent activity, record interactions with protected assets, detect injection attacks, and restrict access through fine-grained capabilities. The catalogue skills support operating and managing this vault.

tophant-ai/ClawVault · 1,079 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add tophant-ai/ClawVault --skill tophant-clawvault-mask-project
Clone the repo
git clone --depth 1 https://github.com/tophant-ai/ClawVault

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for tophant-clawvault-mask-project

README.md
[![agentmods](https://agentmods.dev/badge/skills/tophant-ai/clawvault/tophant-clawvault-mask-project/github.svg)](https://agentmods.dev/skills/tophant-ai/clawvault/tophant-clawvault-mask-project)
Your own site
<a href="https://agentmods.dev/skills/tophant-ai/clawvault/tophant-clawvault-mask-project"><img src="https://agentmods.dev/badge/skills/tophant-ai/clawvault/tophant-clawvault-mask-project/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for tophant-clawvault-mask-project

Your own site · 80×15
<a href="https://agentmods.dev/skills/tophant-ai/clawvault/tophant-clawvault-mask-project"><img src="https://agentmods.dev/badge/skills/tophant-ai/clawvault/tophant-clawvault-mask-project.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 790 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Privilege Escalation · line 107
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00017 $0.00790
Opus 5 $0.00009 $0.00395
Sonnet 5 $0.00003 $0.00158
Haiku 4.5 $0.00002 $0.00079

Measured 13d ago against content hash 335356ac1fef, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

tophant-clawvault-mask-project scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (mask_project.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/tophant-clawvault-mask-project/SKILL.md · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ClawVault Project Document Masking

Use this skill when a user asks to analyze a local company or project document only after ClawVault checks and desensitizes it.

Example User Request

Please analyze project.txt. It is a company project document, so use @clawvault to check and mask it first.

Required Safety Flow

When the user requests ClawVault masking before analysis:

  1. Do not directly read the original file for analysis.
  2. Run this skill first against the user-specified file.
  3. Analyze only the returned sanitized_content or the file written by --output.
  4. Do not quote, summarize, or expose original sensitive values.
  5. Do not restore numbered placeholders such as [mask_1] to original values.

This skill masks sensitive business values with numbered non-reversible placeholders such as [mask_1], [mask_2], and [mask_3]. It does not create a reversible mapping.

Commands

/tophant-clawvault-mask-project generate-policy

Generate the default company-project masking policy.

/tophant-clawvault-mask-project generate-policy
/tophant-clawvault-mask-project generate-policy --save-policy /tmp/clawvault-policy.json

/tophant-clawvault-mask-project mask-file

Mask a local document and return JSON containing sanitized content.

/tophant-clawvault-mask-project mask-file project.txt
/tophant-clawvault-mask-project mask-file project.txt --output project.masked.txt
/tophant-clawvault-mask-project mask-file project.txt --policy /tmp/clawvault-policy.json
/tophant-clawvault-mask-project mask-file project.txt --save-policy /tmp/clawvault-policy.json

What Gets Masked

The default policy targets:

  • Company names with common Chinese or English organization suffixes.
  • Project amount values, especially after labels such as Project Amount, Contract Amount, Budget, 项目金额, 合同金额, or 预算.
  • Contextual person names after labels such as Project Manager, Contact, Owner, 负责人, 联系人, or 项目经理.

For label-introduced values, the label is preserved and only the sensitive value is masked.

Read the full file on GitHub · 109 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 13d ago First seen · 109 lines · 17 tokens per session scan A 335356ac1fef

Subscribe to this mod's changes

tophant-clawvault-mask-project is a skill published in the GitHub repository tophant-ai/ClawVault (1,079 stars, last pushed 23d ago), licensed MIT. It adds 17 tokens to every session and 790 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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