Borrowing it
Nothing to install: this file belongs to Edison-Watch/sealgate-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/Edison-Watch/sealgate-mcp/main/.cursorrulesgit clone --depth 1 https://github.com/Edison-Watch/sealgate-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/rules/edison-watch/sealgate-mcp/cursorrules)<a href="https://agentmods.dev/rules/edison-watch/sealgate-mcp/cursorrules"><img src="https://agentmods.dev/badge/rules/edison-watch/sealgate-mcp/cursorrules/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/rules/edison-watch/sealgate-mcp/cursorrules"><img src="https://agentmods.dev/badge/rules/edison-watch/sealgate-mcp/cursorrules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00389 | $0.00389 |
| Opus 5.5 | $0.00156 | $0.00156 |
| Sonnet 5.5 | $0.00078 | $0.00078 |
| Haiku 4.5 | $0.00039 | $0.00039 |
Grade A, and why
cursorrules 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 1mo 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
Sealgate MCP server
This repo is the public MCP server for Sealgate, an AI data-leak-prevention platform. The server is a thin MCP proxy: it forwards tool calls to an Sealgate gateway, configured via SEALGATE_GATEWAY_URL and SEALGATE_API_KEY. Sealgate runs managed release hosts (the remote MCP gateway at mcp.sealgate.ai, advertised in the discovery manifests, and the Management API at dashboard.sealgate.ai), but demo and self-hosted orgs run their own, so this package stays host-agnostic: never hardcode a gateway URL or key.
Stack
- Bun + TypeScript, MCP TypeScript SDK (@modelcontextprotocol/sdk), zod.
- Biome for lint/format: 4-space indent, double quotes.
Layout
- src/index.ts entrypoint (stdio by default, optional HTTP via env)
- src/server.ts builds the McpServer and registers tools
- src/config.ts validates the two env vars with zod
- src/gateway.ts fetch wrapper that calls the Sealgate gateway with Bearer auth
- src/tools/ one file per proxy tool
Working here
- Build:
bun run build(orbunx tsc --noEmitto typecheck) - Test:
bun test - All checks:
make ci(lint, deadcode, typecheck, tech-debt, duplicate-code, import boundaries, markdown links, AI-writing, Claude/Codex sync) - Run the server:
bun run src/index.ts(add--helpfor usage) - No em dashes in any file; the AI-writing check fails on them.
- Tools must fail gracefully (return an error result) when the env is unset, never throw at startup.
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.
- 1mo ago First seen · 31 lines · 389 tokens per session scan A 67d083a78734
cursorrules is a cursor rule published in the GitHub repository Edison-Watch/sealgate-mcp (1 stars, last pushed 1mo ago), licensed MIT. It adds 389 tokens to every session, about $0.0016 per session on Opus 5.5. 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 2026-08-31.
Other cursor rules, from other repositories
ponytail
Ponytail, lazy senior dev mode. Always pick the simplest solution that works.
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.
dev-standard
Apache Superset development standards and guidelines for Cursor IDE.
prefer-assertions-over-defensive-checks
Prefer assertions over defensive checks when data is guaranteed to be valid.
prefer-direct-imports-over-module-mocks
Prefer extracting a testable core over vi.mock / vi.resetModules when unit tests need to reach production logic entangled with config, env, or singletons.
config-validation-and-normalization
Config validation and normalization responsibilities (defineConfig normalizes, the orm section schema validates and resolves paths, the loader reports per-section diagnostics).