Borrowing it
Nothing to install: this file belongs to ramide1/arca-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/ramide1/arca-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/ramide1/arca-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/instructions/ramide1/arca-mcp/agents-md)<a href="https://agentmods.dev/instructions/ramide1/arca-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ramide1/arca-mcp/agents-md/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/instructions/ramide1/arca-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ramide1/arca-mcp/agents-md.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 | $0.00510 | $0.00510 |
| Opus 5.5 | $0.00204 | $0.00204 |
| Sonnet 5.5 | $0.00102 | $0.00102 |
| Haiku 4.5 | $0.00051 | $0.00051 |
Grade A, and why
arca-mcp AGENTS.md 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 2mo 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
arca-mcp Agent Guidelines
Key Commands
- **Start server: Install:
bun install - Run:
bun src/main.ts - Type check:
bun tsc(no emission due tonoEmit: truein tsconfig) - No test or lint scripts configured
Environment Variables
Required for AFIP authentication (WS-AAA):
ARCA_WSAA_CERT: Certificate file (default:ghf.crt)ARCA_WSAA_PRIVATE_KEY: Private key file (default:ghf.key)ARCA_WSAA_PASSWORD: Private key password (default: empty)ARCA_TEST_MODE: Set tofalsefor production; any other value (or unset) uses homologationARCA_FETCH_LIMIT: SOAP retry attempts (default:3)
Certificate and key files are expected in the current directory (or currentDir tool parameter).
Important Notes
- CUIT format: All tools require CUIT in
XX-XXXXXXXX-Xformat (validated via Zod) - WSDL caching: WSDL files are downloaded to
./{service}_{env}.wsdl(e.g.,wsfe_test.wsdl) and reused for 1 year - OpenSSL required: The
signTrafunction usesopenssl cmsfor signing; ensure OpenSSL is installed and in PATH - SOAP services: Communicates with AFIP's WS-FE (electronic invoicing) and WSAA (authentication) services
- Temp files: Creates
TRA_*.xmlandTA_*.xmlfiles in the directory specified bycurrentDir(default:./) - TypeScript: Strict type checking enabled;
moduleResolution: bundler(Bun-specific) - Project structure:
src/main.ts: MCP server entry pointsrc/tool.ts: MCP tool definitions (AFIP service wrappers)src/arcaService.ts: SOAP client implementationsrc/interface.ts: Unused (empty)
Development Notes
- No test framework configured; manual testing via MCP tools recommended
- No lint/formatter config in repo (though
.gitignorereferences ESLint/Prettier) - Uses Bun's built-in test runner? Not configured
- WSDL downloads occur on first use or when cached file >1 year old
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.
- 2mo ago First seen · 36 lines · 510 tokens per session scan A ed8048a1d248
arca-mcp AGENTS.md is an instructions file published in the GitHub repository ramide1/arca-mcp (0 stars, last pushed 3mo ago), licensed MIT. It adds 510 tokens to every session, about $0.0020 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.
arca-mcp AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| arca-mcp AGENTS.mdramide1/arca-mcp | Instructions file | 0 | 3mo ago | MIT | A | 510 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,649 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |