Borrowing it
Nothing to install: this file belongs to doncheli/don-cheli-sdd. 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/doncheli/don-cheli-sdd/main/.cursorrulesgit clone --depth 1 https://github.com/doncheli/don-cheli-sddWrote 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/rules/doncheli/don-cheli-sdd/cursorrules)<a href="https://agentmods.dev/rules/doncheli/don-cheli-sdd/cursorrules"><img src="https://agentmods.dev/badge/rules/doncheli/don-cheli-sdd/cursorrules/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/rules/doncheli/don-cheli-sdd/cursorrules"><img src="https://agentmods.dev/badge/rules/doncheli/don-cheli-sdd/cursorrules.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 | $0.01355 | $0.01355 |
| Opus 5.5 | $0.00542 | $0.00542 |
| Sonnet 5.5 | $0.00271 | $0.00271 |
| Haiku 4.5 | $0.00136 | $0.00136 |
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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Don Cheli — SDD Framework for Cursor
Identity
Development assistant under Don Cheli (Specification-Driven Development). 7 lifecycle phases + 3 iron laws.
Iron Laws (Non-Negotiable)
- TDD: All production code requires tests — RED → GREEN → REFACTOR, no exceptions
- Debugging: Root cause first, then fix — Reproduce → Isolate → Understand → Fix → Verify
- Verification: Evidence before assertions — "Tests pass" > "I think it works"
Deviation Rules
- Rules 1-3: Auto-correct (bugs, missing items, blockers)
- Rule 4: STOP and ask (architectural changes)
- Rule 5: Register and continue (improvements)
Commands Available
All commands work with /dc: prefix. Key commands:
Lifecycle
/dc:init— Initialize project/dc:start— Start task with auto-detected complexity (Level 0-4)/dc:specify— Generate Gherkin spec + DBML schema/dc:clarify— Auto-QA + resolve ambiguities/dc:tech-plan— Technical blueprint/dc:breakdown— TDD task breakdown with parallelism markers/dc:implement— TDD execution: RED → GREEN → REFACTOR/dc:review— 7-dimension peer review
Reasoning (15 models)
/razonar:pre-mortem— Anticipate failure before it happens/razonar:5-whys— Root cause analysis/razonar:pareto— 80/20 focus/razonar:inversion— Solve by thinking backwards/razonar:first-principles— Decompose to fundamentals/razonar:second-order— Consequences of consequences/razonar:opportunity-cost— Evaluate what you're NOT choosing/razonar:reversibility— Calibrate commitment level/razonar:minimize-regret— Long-term decision making/razonar:circle-of-competence— Know your limits/razonar:map-territory— Model vs reality/razonar:probabilistic— Reason in probabilities/razonar:rlm-chain-of-thought— Multi-step reasoning with context folding/razonar:rlm-decomposition— Recursive decomposition with sub-LLMs/razonar:rlm-verification— Verification with sub-LLMs
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.
- 1mo ago First seen · 116 lines · 1,355 tokens per session scan A 04c274030ce9
cursorrules is a cursor rule published in the GitHub repository doncheli/don-cheli-sdd (57 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 1,355 tokens to every session, about $0.0054 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 2026-08-30.
Other cursor rules, from other repositories
development
Core development practices for frontend, testing, and Python environments.
80-testing-quality
Testing and code quality rules.
testing
Testing conventions, bug fix workflow, TDD, mocking discipline, and test commands.
autocode-workflow
Enforces the autocode development pipeline discipline for order-service.
testing-and-safety
TDD bias; no secrets in code; new logic needs unit tests.
ponytail
Ponytail, lazy senior dev mode. Always pick the simplest solution that works.