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DEVELOPER CONTEXT PACK · NEXT.JS · FLUTTER · FIREBASE

Stop Wasting AI Tokens. Get Surgical Developer Context.

Pre-configured, folder-scoped .mdc rules and strict CLAUDE.md templates optimized for Next.js, Flutter, and Firebase. Built to eliminate AI hallucinations and save up to 60% on prompt token costs.

Get Pack — $29 Read a rule file

$29 USD · one-time ZIP · instant download · 14-day refund

CONTEXT ATTACH

Next.js

    .cursorrules

    10,482

    this file

    54

    02 / COMPARE

    The same constraints. Attached only where they apply.

    SATURATED

    Traditional .cursorrules

    • Attach scope

      The entire root .cursorrules file, on every chat, no matter which file is open.

    • Typical size

      10,000+ tokens of rules before the question is typed.

    • Wrong context

      Database and Firebase rules sit in the window while you edit front-end CSS.

    • Cost shape

      You pay to resend that file on every prompt. The model cites the wrong stack.

    SCOPED

    Threshold folder-scoped rules

    • Attach scope

      The one .mdc whose globs match the open folder. alwaysApply is false.

    • Typical size

      A ~50-token sheet for the folder you actually touched.

    • Right context

      Database constraints load only inside src/db/. hero.tsx never sees them.

    • Cost shape

      The prompt stays on the file in front of you. Unused rules stay on disk.

    Counts are the size of the rule text an editor attaches, not a rate card from a model vendor. Cursor honors globs and alwaysApply: false. Claude Code reads CLAUDE.md. Editors that ignore both will not see the cut.

    03 / RULE FILE

    A sheet, not a second system prompt.

    Frontmatter decides when the file loads. The body is the constraint list. No persona. No prose.

    MDC 
    
          
    
          
    
            alwaysApply: false
            
          
    
        
    
      
    
    
    

    
    
      
    04 / THE ZIP
    
      
    What you unzip. Nothing networked.
    
      
    
        
    
          
    ZIP ROOT
    
          
    threshold-context-pack/
├── .cursor/
│   └── rules/                 # 12 folder-scoped .mdc files
│       ├── next-app.mdc
│       ├── next-server.mdc
│       ├── react-ui.mdc
│       ├── api-routes.mdc
│       ├── db.mdc
│       ├── tests.mdc
│       ├── flutter-widget.mdc
│       ├── flutter-state.mdc
│       ├── firebase-security.mdc
│       ├── firebase-functions.mdc
│       ├── firestore-schema.mdc
│       └── ci.mdc
├── CLAUDE.md                  # CLI build / test / lint contract
├── AGENTS.md                  # supervisor-agent topology
└── README.md                  # 1-step install
    
        
    
        
    
          
    
            
    INSTALL
    
            
    cp -a pack/.cursor pack/CLAUDE.md pack/AGENTS.md .
    
            
    From the repo root. README is that command, plus where each glob points.
    
          
    
          
      
            
    • .cursor/rules/ — 12 folder-scoped .mdc files for Next.js, Flutter, and Firebase.
      • 
            
    • CLAUDE.md — CLI build, test, and lint templates. What the agent must not shell out and do.
      • 
            
    • AGENTS.md — supervisor topology. A planner may assign work. Only the agent holding that folder's rule edits it.
      • 
            
    • README.md — the one-step install. No bootstrap script.
      • 
          
    
        
    
      
    
    
    

    
    
      
    
        
    05 / LOCAL ONLY
    
        
    100% static. Zero setup overhead. Zero hosting. Zero lock-in.
    
        
    These are local configuration assets. They do not phone home, open a port, or require a Threshold account. Uninstall is deleting the files. The mailbox is for orders and refunds, not a pairing session on your codebase.
    
        
    
          
    Runtime
    None. Markdown and YAML frontmatter only.
    
          
    Hosting cost
    $0. The files live in your repo.
    
          
    Setup
    One copy command. No daemon, no API key, no account.
    
          
    Lock-in
    None. Delete .cursor/rules, CLAUDE.md, and AGENTS.md.
    
        
    
      
    
    
    

    
    
      
    
        
    $29 USD · ONE TIME
    
        
    The tree above. Delivered as a ZIP.
    
        
    Checkout runs on Polar. Card data never hits this site. 14-day refund, no questions — email hello@usethreshold.co with your order address.
    
      
    
      
    
        Get Pack — $29
        buy.polar.sh checkout
      
    
    
    
  
    

  

  
    
    
    
      
    LEGAL
    
      
    Privacy Policy
    
      
    Last updated October 15, 2026
    
      
    
        
    Threshold, at usethreshold.co, sells the Developer Context Pack: a one-time ZIP of text files you download and keep in a repository. This policy covers the marketing site and the sale.
    
        
    What this site collects
    
        
    The site does not require an account and does not run advertising pixels. If you email hello@usethreshold.co, that message is used to answer you and kept long enough to finish the order, refund, or question.
    
        
    Checkout
    
        
    Payment is processed by Polar, the merchant of record on the checkout page. Card numbers and tax details are handled by Polar, not by this site. Polar presents its own privacy policy before you pay. We receive what Polar shares so we can deliver the download and handle a refund: typically your email, the product purchased, and the payment status.
    
        
    The files themselves
    
        
    The ZIP is Markdown and rule text. It contains no analytics SDK, license check, or remote call. After download, Threshold cannot see where you put the files.
    
        
    Privacy questions: hello@usethreshold.co. Operator: github.com/bzucker4.
    
      
    
    
    
  
    

  
    
    
    
      
    LEGAL
    
      
    Terms of Service
    
      
    Last updated October 15, 2026
    
      
    
        
    These terms cover the Developer Context Pack sold at usethreshold.co for $29 USD, one time. Paying for the download means you accept them. The seller is the operator of usethreshold.co.
    
        
    The product
    
        
    You receive a ZIP of static configuration files: folder-scoped .mdc rules under .cursor/rules/, plus CLAUDE.md, AGENTS.md, and README.md, matching the directory listed on this page. There is no hosted app, seat, or subscription.
    
        
    License
    
        
    After payment you may use and modify the files in private and commercial repositories you own or are paid to work in. You may not resell the pack, republish the unmodified ZIP, or ship it as a competing template.
    
        
    Delivery
    
        
    Delivery is a download from Polar after payment clears. Checkout: https://buy.polar.sh/polar_cl_hJZPfwbXGc5bmUonCrCoENdnigpFkF7VwD7pG22mHiD.
    
        
    Refunds
    
        
    Email hello@usethreshold.co within 14 days of purchase, from the address you used at checkout, and the purchase price is refunded. One refund per customer. Say if the archive was corrupt or simply unwanted.
    
        
    No support retainer
    
        
    The mailbox answers orders, download problems, and refunds. It is not an implementation contract. We do not debug your application, review your Firestore rules, or join your repository.
    
        
    No savings warranty
    
        
    The files are written for Cursor glob-scoped rules and for Claude Code's CLAUDE.md. Any reduction in prompt tokens depends on the editor actually attaching rules by glob. We do not warrant a percentage from any model vendor, and we do not control their prices. Rule text is a pattern, not a security certification of your project.
    
        
    Liability
    
        
    The pack is provided as-is. To the extent the law allows, liability is limited to the amount you paid for it.
    
        
    Contact: hello@usethreshold.co · github.com/bzucker4.