Borrowing it
Nothing to install: this file belongs to swimmwatch/cloakbrowser-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/swimmwatch/cloakbrowser-mcp/main/.agents/skills/security-and-hardening/SKILL.mdgit clone --depth 1 https://github.com/swimmwatch/cloakbrowser-mcpWrote 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.
[](https://agentmods.dev/skills/swimmwatch/cloakbrowser-mcp/security-and-hardening)<a href="https://agentmods.dev/skills/swimmwatch/cloakbrowser-mcp/security-and-hardening"><img src="https://agentmods.dev/badge/skills/swimmwatch/cloakbrowser-mcp/security-and-hardening/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.
<a href="https://agentmods.dev/skills/swimmwatch/cloakbrowser-mcp/security-and-hardening"><img src="https://agentmods.dev/badge/skills/swimmwatch/cloakbrowser-mcp/security-and-hardening.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00097 | $0.00480 |
| Opus 5 | $0.00048 | $0.00240 |
| Sonnet 5 | $0.00019 | $0.00096 |
| Haiku 4.5 | $0.00010 | $0.00048 |
Grade A, and why
security-and-hardening 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 11d ago.
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.
What it actually says
Security And Hardening
- Read
AGENTS.md,SECURITY.md, target code/configuration, affected tests, and the public contract. Use CodeGraph before broad source search when indexed. - Define the protected asset, trust boundary, actor, capability, entry point, security property, expected impact, and whether the behavior belongs to this bridge or upstream Playwright MCP.
- Trace data and authority through CLI/environment parsing, HTTP requests and sessions, MCP validation, temporary config, upstream child execution, browser/profile/filesystem/network access, output and logs, Docker mounts and sandboxing, dependencies, workflows, artifacts, OIDC/tokens, and registries as applicable.
- Check allow-lists, path containment, argument construction, environment inheritance, transport binding/TLS, session isolation, cancellation, cleanup, redaction, least privilege, action/image pinning, dependency provenance, artifact immutability, and release gates.
- Account for unchanged upstream unsafe tools such as
browser_evaluateandbrowser_run_code_unsafe; do not misrepresent the bridge as a browser sandbox or access-control layer. - Recommend the smallest effective mitigation and positive/negative verification while preserving contracts. Use Prompt MCP for a material security-versus-compatibility choice that evidence cannot settle.
- Run focused tests plus applicable
npm run check, audit, package, Docker, actionlint, zizmor, or parity checks. Never disable or broadly suppress a check merely to pass.
Report evidence, exploit preconditions without harmful payloads, impact, mitigation, verification, residual risk, upstream-reporting needs, and release implications. Do not publish vulnerability details or release a fix without separate authorization.
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.
- 11d ago First seen · 37 lines · 97 tokens per session scan A 645ca4f0eff5
security-and-hardening is a skill published in the GitHub repository swimmwatch/cloakbrowser-mcp (56 stars, last pushed today), licensed MIT. It adds 97 tokens to every session and 480 once invoked, about $0.0005 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.
Other skills, from other repositories
browser-search
Multi-engine web search (SearXNG) + browsing/scraping (Camofox, CloakBrowser). Use whenever you need to do web research.
x402
Set up Browser Use Cloud payments with x402 — pay per request from a crypto wallet (USDC on Base mainnet), no signup or API key. Two setups it works out up front — "just use it" (set up a wallet so you or Claude Code can run cloud browser tasks paid from the wallet — Claude writes and runs throwaway scripts, nothing…
browser-use
Direct browser control via CDP for web interaction: automation, scraping, testing, screenshots, and site/app work.
open-source
Documentation reference for writing Python code using the browser-use open-source library. Use this skill whenever the user needs help with Agent, Browser, or Tools configuration, is writing code that imports from browseruse, asks about @sandbox deployment, supported LLM models, Actor API, custom tools, lifecycle…
opencli-autofix
Automatically fix broken OpenCLI adapters when commands fail. Load this skill when an opencli command fails — it guides you through collecting a trace artifact, patching the adapter, retrying, and filing an upstream GitHub issue after a verified fix. Works with any AI agent.
opencli-usage
Use at the start of any OpenCLI session — this is the top-level map of what opencli can do, how to discover adapters, what flags and output formats are universal, and which specialized skill to load next. Point here when an agent asks "what can opencli do?" or "how do I find the right command?".