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/omergulcicek/omergulcicek.com/core-principlesgit clone --depth 1 https://github.com/omergulcicek/omergulcicek.comWrote 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/omergulcicek/omergulcicek.com/core-principles)<a href="https://agentmods.dev/rules/omergulcicek/omergulcicek.com/core-principles"><img src="https://agentmods.dev/badge/rules/omergulcicek/omergulcicek.com/core-principles.svg" alt="Measured on agentmods" 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 | $0.00492 | $0.00492 |
| Opus 5 | $0.00246 | $0.00246 |
| Sonnet 5 | $0.00098 | $0.00098 |
| Haiku 4.5 | $0.00049 | $0.00049 |
Grade A, and why
core-principles 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 3d 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
Core Constitution
Constraints
- INTENTIONAL_TODO Rule: Usage is ONLY permitted for non-functional placeholders (e.g., temporary mock UI, future logging).
- Business Integrity: Forbidden to use
INTENTIONAL_TODOfor business logic, error handling, or API integrations. - Pseudo-code: Forbidden. Provide working TypeScript/React code.
- Reference: Do not say "Usually done like this"; link to repo rules.
- Validation: Do not deliver without passing
pnpm check-typesandpnpm lint. - Search First: Analyze existing patterns before coding.
- Minimal Intervention: Modify only necessary areas.
- Source of Truth: Reference the codebase. Correct it if erroneous.
- Boy Scout: Clean unused imports,
console.log, and dead code. - Naming:
kebab-casefor folders/non-component files;PascalCasefor React components. File type suffixes:*.types.ts,*.constants.ts,*.config.ts,*.test.ts,*.spec.ts,*.stories.tsx,*.schema.ts,*.api.ts,*.store.ts(base name in kebab-case). - Exports: Group exports with
index.ts. - No Silent Failures: Do not swallow errors. Manage
try/catchblocks. - Secret Protection: Do not log
.envcontent. - Dependency: Obtain approval for new packages.
Bans
- Comments (except JSDoc).
- Placeholders/incomplete code.
catch (e) {}(Silent catch).- Logging secrets.
- Out-of-scope refactoring.
// ...existing code(Provide full blocks).- Standard
TODOorFIXMEcomments. - Using
INTENTIONAL_TODOto skip core logic implementation. - Parent-relative imports (
../,../../). Use path aliases only.
Correct Implementation
Incorrect Implementation
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.
- 3d ago First seen · 56 lines · 492 tokens per session scan A dcfbf105daaf
core-principles is a cursor rule published in the GitHub repository omergulcicek/omergulcicek.com (15 stars, last pushed 8d ago), licensed MIT. It adds 492 tokens to every session, about $0.0025 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 2026-09-01.
Other cursor rules, from other repositories
development-workflow
AAMAD modular development workflow for context-aware agent coordination.
feedback-enhanced
Enhanced feedback mechanism with 1-hour timeout - 增强反馈机制，1小时超时.
project-onboarding-rule
Automatically onboards existing projects into the AI-driven development workflow.
linear-in-review
After finishing a Linear issue, set its status to In Review (never Done).
sprint-planning
BMAD BMM Agent: sprint-planning.
generate-tasks
Understanding our task list for our project or how to make one from a PRD.