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.
npx agentmods add rules/goranerhartic/cursor-development-rules/quick_startgit clone --depth 1 https://github.com/GoranErhartic/cursor-development-rulesWhat 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 | $0.00025 | $0.00370 |
| Opus 5 | $0.00013 | $0.00185 |
| Sonnet 5 | $0.00005 | $0.00074 |
| Haiku 4.5 | $0.00003 | $0.00037 |
Grade A, and why
QUICK_START 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 2d 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
Quick Start
Use this file when you need to quickly decide which rules to load.
First 4 Steps
- Read
agent-behavior.mdcfor core constraints and conflict protocol. - Read
project-context.mdcto identify active stack routers. - Open the relevant router from
rule-index.mdc. - Load only 2–3 rules needed for the current sub-task.
If project-context.mdc Is Placeholder-Only
Request development/project-onboarding.mdc, generate project-context.mdc, then continue with router-driven loading.
Common Task Shortcuts
- Build API endpoint:
languages/*/controllers.mdc,languages/*/validation.mdc,languages/*/error-handling.mdc - Add tests:
languages/*/testing.mdc,patterns/testing.mdc,development/tdd-workflow.mdc - Security hardening:
languages/*/security.mdc,languages/*/input-sanitization.mdc,languages/*/auth.mdc - Refactor/cleanup:
patterns/clean-code.mdc, stacklanguages/*/code-quality.mdc - Infra changes (Lambda):
languages/aws-lambda/cdk-infrastructure-*.mdc,languages/aws-lambda/monitoring.mdc,languages/aws-lambda/security.mdc
See also: rule-index.mdc, README.md, development/project-onboarding.mdc
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.
- 2d ago First seen · 31 lines · 25 tokens per session scan A 7b8bf7d91fdf
QUICK_START is a cursor rule published in the GitHub repository GoranErhartic/cursor-development-rules (19 stars, last pushed 6mo ago), licensed MIT. It adds 25 tokens to every session and 370 once invoked, about $0.0001 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 2026-08-30.
Other cursor rules, from other repositories
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apply when interacting with PostHog/analytics tasks.
README
Cursor rules index and navigation guide.
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Information architecture patterns for navigation, structure, and labeling.
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.
typescript
Changes to these high-fan-out internals can affect every message, delta, element, or rerun. Keep work in them minimal, and benchmark changes with representative stress-test apps.