cursor-rules

Rules for using CodeGenome, a knowledge graph that maps a codebase's architecture, dependencies, and symbols. They also define fallback steps when that tool is unavailable.

In plain words
What is it for?
Use them when querying a codebase's structure, tracing dependencies, locating symbols, or analyzing how parts of a project fit together.
Why use it?
They help an agent understand how a repository is connected before changing or investigating code.

Cursor rule

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/ogro-projukti/codegenome/cursor-rules
Clone the repo
git clone --depth 1 https://github.com/Ogro-Projukti/codegenome
Per session 554 This file is loaded in full into every session.
When invoked 554 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin 94% copy Near-identical to another mod 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 $0.00554 $0.00554
Opus 5 $0.00277 $0.00277
Sonnet 5 $0.00111 $0.00111
Haiku 4.5 $0.00055 $0.00055

Measured yesterday against content hash 3ffe193de7df, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cursor-rules 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.

Origin

This is a copy

94% identical to codegenome-knowledge-graph — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

src/codegenome/templates/rules/cursor-rules.mdc · 30 lines

How it starts

The opening of the file, as written. The whole thing — 30 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CodeGenome MCP Integration

You are operating within a repository analyzed by CodeGenome, an architectural knowledge graph tool. This project contains a .genome/ directory.

Core Directives

  1. Mandatory MCP Usage: When .genome/codegenome.db exists, you MUST use CodeGenome MCP access for all codebase, architecture, dependency, or symbol queries whenever it is available.
  2. Access Order: First use native CodeGenome MCP tools exposed in your context. If those tools are missing, you MAY try a local MCP HTTP endpoint such as http://127.0.0.1:{{MCP_PORT}}/mcp when the user has started it or configured it. Treat this as MCP transport access, not as an arbitrary application HTTP API.
  3. Prefer Graph over Grep: Use graph-backed MCP tools instead of raw file searching (grep) or reading entire files blindly. The graph provides semantic understanding.
  4. Fallback Gracefully: If native MCP tools are missing and HTTP MCP access is unavailable, incompatible, or returns empty data, tell the user exactly what failed and what to configure. Then, if needed, read .genome/graph.json or .genome/exports/*.md before resorting to standard text searches.
  5. Keep Context Fresh: After modifying code files, remind the user to run codegenome analyze or start the live evolution server codegenome evolve --live to keep the graph updated.

Available MCP Capabilities

  • Discovery: search_nodes (find symbols)
  • Relationships: get_neighbors (imports, callers, callees)
  • Architecture: get_entry_points, get_dead_code, get_circular_deps, get_god_nodes
  • Metrics: get_complexity, get_churn, get_graph (summary statistics)
  • Evolution: get_timeline, get_changes (architectural diffs)

Constraints & Behaviors

  • Only read .genome/graph.json or .genome/exports/*.md directly if native MCP tools and local HTTP MCP transport are unavailable or fail to surface enough context.
  • Verify your MCP usage by monitoring tool call success. If native tools are missing, try the configured local HTTP MCP endpoint when possible. If both native and HTTP MCP access fail, politely ask the user to configure their editor's MCP settings to run codegenome mcp-start (stdio) or start the server with codegenome mcp-start --transport http.

Read the full file on GitHub · 30 lines

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 · 30 lines · 554 tokens per session scan A 3ffe193de7df

Subscribe to this mod's changes

cursor-rules is a cursor rule published in the GitHub repository Ogro-Projukti/codegenome (23 stars, last pushed 1mo ago), licensed MIT. It adds 554 tokens to every session, about $0.0028 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to codegenome-knowledge-graph, differing in 2 lines, and is treated as a copy.