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take-homes

Build it in your editor. We grade the upload.

Authored projects with a frozen variant, public tests you can run locally, and hidden tests that never leave the server. Pull them with Cursor, Codex, or the BlankCode CLI. The agent may not write src/.

13 templates · MCP on /connect · blankcode projects start <slug>

  • Bounded async worker pool

    bounded-worker-pool · hard · typescript

  • Coupon pricing engine

    coupon-pricing-engine · hard · typescript

  • Late-event ingestion

    late-event-ingestion · hard · typescript

  • Nitro signed download tickets

    nitro-signed-download-tickets · hard · typescript

  • Reproducible dataset lineage planner

    reproducible-dataset-lineage · hard · typescript

  • Tenant authz, pagination, consistency

    access-slice · very_hard · typescript

  • Trace SLO rollup

    trace-slo-rollup · hard · typescript

  • Webhook delivery

    webhook-delivery · hard · typescript

  • Evaluation review ledger

    eval-review-ledger · hard · typescript

  • Incremental search index

    incremental-search-index · hard · typescript

  • LRU cache with expiry

    lru-ttl-cache · hard · typescript

  • Reliable Node webhook receiver

    reliable-webhook-receiver · medium · node

  • Tenant-safe GraphQL gateway

    tenant-graphql-gateway · very_hard · typescript

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