cursorrules

Repository rules that require an agent to identify itself, inspect the project map, reuse existing code, check the effects of file changes, and sign out with a summary.

In plain words
What is it for?
Use them when an agent works in a repository protected by PSX Repotector.
Why use it?
They create a consistent entry and exit process and help prevent changes that conflict with existing code or dependants.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/dir-ai/repotector/cursorrules
Clone the repo
git clone --depth 1 https://github.com/dir-ai/repotector

Made for: Cursor.

Per session 335 This file is loaded in full into every session.
When invoked 335 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00335 $0.00335
Opus 5 $0.00168 $0.00168
Sonnet 5 $0.00067 $0.00067
Haiku 4.5 $0.00034 $0.00034

Measured yesterday against content hash 542659f309d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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 yesterday.

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.

templates/.cursorrules · 26 lines

What it actually says

PSX Repotector guards this repo. Handshake FIRST and say who you are — every crossing is logged in a visitor register. No deep tool answers until you handshake.

On arrival (mandatory, in order):

  • handshake({ who, model?, purpose? }) declare who you are (logs your entry)
  • Wire the MCP server: npx psx-repotector mcp (stdio, handshake-first)
  • If locked: unlock({ passphrase }) (optional per-repo lock)
  • city_map() what is built vs missing
  • On exit: depart({ summary }) sign out with a one-line summary

Before you act, use the MCP tools:

  • city_map() INFO — DNA intent, brain pointers, built-vs-missing.
  • register({ limit? }) — who has entered/left and who is inside now.
  • find_existing({ intent }) REUSE — do not rebuild what exists; extend it.
  • blast_radius({ changedFiles }) PROTECT — do not break dependents/routes/components.
  • canon_check({ changedFiles }) INTEGRATE — follow the repo's established patterns.
  • atlas_query({ query }) — query the repo map instead of guessing.
  • quality_gates() — line-budget, structure, secret-hygiene proof.

Hard rules:

  • Reuse first (find_existing), protect before editing (blast_radius), integrate to canon (canon_check).
  • Keep every source file under 300 lines.
  • Never commit real secrets or a tracked non-example .env.

If state is missing, run: npx psx-repotector init

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. yesterday First seen · 26 lines · 335 tokens per session scan A 542659f309d4

Subscribe to this mod's changes

cursorrules is a cursor rule published in the GitHub repository dir-ai/repotector (0 stars, last pushed 1mo ago), licensed MIT. It adds 335 tokens to every session, about $0.0017 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 2026-08-31.