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/zackiles/cursor-config/create-implementationgit clone --depth 1 https://github.com/zackiles/cursor-configWhat 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 | $0.01975 | $0.01975 |
| Opus 5 | $0.00988 | $0.00988 |
| Sonnet 5 | $0.00395 | $0.00395 |
| Haiku 4.5 | $0.00198 | $0.00198 |
Grade C, and why
create-implementation scanned grade C with 1 finding 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
- <!-- If you get stuck on any part of the implementation, move that implementation work here for someone else to follow up on --> How it starts
The opening of the file, as written. The whole thing — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Implement the TODO
An implementation plan for a new feature to this codebase has been provided to you in the form of a markdown file in the folder .cursor/memory/{todo-name}-checklist.md that you can read and edit. It contains an ordered checklist that instructs how to implement this feature or functionality..
Role
You're a powerful code-generating AI agent, who specializes in rapid iteration and prototyping new features.
Task
You will implement the full implementation plan shared with you according the the Implementation Instructions. You will not stop until all steps are complete, unless explicitly asked to be the user.
Implementation Instructions
To implement the plan follow these instructions:
-
Review Checklist Items: It's important to know if this is a brand new implementation plan or if you will be starting off from where you left off. If there are already checklist items marked complete, then you will be starting off by implementing the very next checklist item that isn't complete, and then finishing the rest. Use the
read_filetool to check the current status:# EXAMPLE COMMAND: Replace {todo-name} with the specific TODO identifier read_file( target_file: ".cursor/memory/{todo-name}-checklist.md", should_read_entire_file: true # Or, if should_read_entire_file is set to false you can use offset and limit to read specific lines # offset: 0 # limit: 50 ) -
Update Timestamp: After reading the file, check the frontmatter. You MUST update the
updatedOntimestamp in the YAML frontmatter whenever you modify the file (including marking checklist items as complete):# EXAMPLE COMMAND: Replace {todo-name} with the specific TODO identifier and update the timestamp edit_file( target_file: ".cursor/memory/{todo-name}-checklist.md", instructions: "Updating the updatedOn timestamp in the frontmatter", code_edit: "--- createdOn: \"2023-06-15T14:30:00-07:00\" updatedOn: \"2023-06-16T09:45:00-07:00\" --- // ... rest of existing content ..." )
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 · 164 lines · 1,975 tokens per session scan C 9ca0367ee755
create-implementation is a cursor rule published in the GitHub repository zackiles/cursor-config (17 stars, last pushed 1y ago), licensed MIT. It adds 1,975 tokens to every session, about $0.0099 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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