security-for-apps

security-for-apps is a cursor rule for Cursor from SyntaxArc/archipy-plugin. It costs 416 tokens per session, scanned A, original, MIT.

A security rule set covers secrets, logging, input validation, database queries, infrastructure errors, and dependency choices in ArchiPy apps. It requires sensitive values to come from configuration rather than source files.

In plain words
What is it for?
Use it when handling authentication, configuration, logs, external input, SQL or CQL queries, uploads, deserialization, and network-facing adapters.
Why use it?
It reduces the risk of leaking credentials, exposing internal errors, or allowing unsafe query construction and unvalidated input.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit Use it when handling authentication, configuration, logs, external input, SQL or CQL queries, uploads, deserialization, and network-facing adapters.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/syntaxarc/archipy-plugin/security-for-apps
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.

Clone the repo
git clone --depth 1 https://github.com/SyntaxArc/archipy-plugin

Made for: Cursor.

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 security-for-apps

README.md
[![agentmods](https://agentmods.dev/badge/rules/syntaxarc/archipy-plugin/security-for-apps/github.svg)](https://agentmods.dev/rules/syntaxarc/archipy-plugin/security-for-apps)
Your own site
<a href="https://agentmods.dev/rules/syntaxarc/archipy-plugin/security-for-apps"><img src="https://agentmods.dev/badge/rules/syntaxarc/archipy-plugin/security-for-apps/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 security-for-apps

Your own site · 80×15
<a href="https://agentmods.dev/rules/syntaxarc/archipy-plugin/security-for-apps"><img src="https://agentmods.dev/badge/rules/syntaxarc/archipy-plugin/security-for-apps.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 416 This file is loaded in full into every session.
When invoked 416 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00416 $0.00416
Opus 5.5 $0.00166 $0.00166
Sonnet 5.5 $0.00083 $0.00083
Haiku 4.5 $0.00042 $0.00042

Measured 12d ago against content hash 833eae76e227, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

security-for-apps 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 12d 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.

rules/security-for-apps.mdc · 37 lines

What it actually says

Security for ArchiPy Apps

Secrets and Logging

  • Never hardcode tokens, passwords, private keys, connection credentials, or OTLP authorization headers.
  • Resolve secrets through BaseConfig settings sources (environment, secret files, or Vault) and document names only in .env.example.
  • Never put secrets in committed .env / .env.test files; keep committed test values non-sensitive and prefer .env.example for required-variable documentation.
  • Do not log credentials, session/JWT tokens, cookies, full authorization headers, or unrestricted request bodies.
  • Trace attributes may include non-sensitive identifiers only; do not capture free-form payloads or secret-like values.

Inputs and Infrastructure

  • Validate external input at service/port boundaries.
  • Use parameterized SQL/CQL and bound query values; never concatenate untrusted values into query text.
  • Map infrastructure failures to domain errors without exposing driver messages, stack traces, hosts, or credentials.
  • Health, readiness, and liveness responses reveal nothing about the service (no dependency names, versions, hosts, uptime, or error text): return only a status code and log probe failures server-side.
  • Add dependencies with uv add; prefer the smallest matching archipy[...] extras.
  • Treat network-facing adapters, authentication, cryptography, uploads, and deserialization as security-sensitive.

Suppressions

  • Fix findings before suppressing them.
  • Keep # nosec, Ruff # noqa: S..., and type suppressions to the smallest line/file scope.
  • Name the rule and explain the false positive beside the suppression.
  • Never blanket-disable Bandit or Ruff security rules for a new package.

Run the app's configured security scan after security-sensitive changes. If none exists, recommend adding Bandit/Ruff security checks rather than assuming ArchiPy's library make security target is available.

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. 12d ago Changed · +2 lines · +42 tokens per session 833eae76e227
  2. 1mo ago First seen · 35 lines · 374 tokens per session scan A 8d700bf03987

Subscribe to this mod's changes

security-for-apps is a cursor rule published in the GitHub repository SyntaxArc/archipy-plugin (3 stars, last pushed 2d ago), licensed MIT. It adds 416 tokens to every session, about $0.0017 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 2026-09-08.