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/thesethrose/devrules/01-project-contextgit clone --depth 1 https://github.com/TheSethRose/DevRulesWhat 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 | $0.00610 | $0.00610 |
| Opus 5 | $0.00305 | $0.00305 |
| Sonnet 5 | $0.00122 | $0.00122 |
| Haiku 4.5 | $0.00061 | $0.00061 |
Grade A, and why
01-project-context 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.
How it starts
The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Project Configuration
1. Project Overview
- Project Name:
- Brief Description:
- Repository URL (e.g., GitHub):
- Main Branch Name:
- Website / Deployment URL:
2. Technical Stack
List the primary technologies and versions if known.
- Programming Language(s):
- Frontend Framework/Libraries:
- Backend Framework/Libraries:
- Database(s) & ORM/ODM:
- Authentication Method/Library:
- State Management (Frontend):
- UI Component Library:
- Testing Frameworks/Libraries:
- Build Tools/Bundlers:
- Package Manager (npm, yarn, pnpm, etc.):
- Deployment Platform/Environment:
- Other Key Libraries/Tools:
3. Project Structure
Briefly describe the main source code directories and their purpose.
Example:
- /src/app: Next.js App Router pages/layouts
- /src/components: Reusable UI components
- /src/lib: Utility functions, shared code, types
- /prisma: Database schema and migrations
- /scripts: Utility/automation scripts
/:/:/:/:/:
4. Coding Conventions & Standards
Specify any enforced or preferred conventions.
- Naming Conventions:
- Files:
- Directories:
- Variables/Functions:
- Classes/Components:
- CSS Classes:
- Formatting Tool (e.g., Prettier): (Yes/No? If yes, are defaults used?)
- Linter Tool (e.g., ESLint, RuboCop): (Yes/No? Specify config if non-standard)
- Code Style Preferences: (e.g., single vs double quotes, semicolon usage, functional vs class components)
- Path Aliases (e.g.,
@/*->src/*): - Commenting Style:
5. Key Abstractions & Patterns
List any important custom hooks, utility functions, base classes, or design patterns the AI should prioritize using.
Example:
- Always use the useApiData() hook (in src/hooks/) for data fetching.
- Use the logger utility (in src/lib/logger.ts) for all server-side logging.
- Follow the Repository pattern for database access.
6. Important Notes or Constraints
Any other critical information the AI should know? (e.g., performance constraints, specific browser support, accessibility requirements)
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.
- yesterday First seen · 80 lines · 610 tokens per session scan A 3d498dfb89ec
01-project-context is a cursor rule published in the GitHub repository TheSethRose/DevRules (25 stars, last pushed 1y ago), licensed MIT. It adds 610 tokens to every session, about $0.0030 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.
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