{
  "kind": "haystacks",
  "version": "v1",
  "description": "Long-context texts (about 4k to 200k tokens) of seeded almanac prose with planted facts at known depths: single-needle depth sweeps, multi-needle, two-hop chains and near-miss distractors. Answer keys give line, char offset, approximate token offset and depth percent.",
  "count": 5,
  "bundle_url": "/fixtures/haystacks/bundle.zip",
  "items": [
    {
      "id": "needle-32k-d000",
      "subkind": "single",
      "title": "Single needle, 32k tokens, 0% depth",
      "tags": [
        "long-context",
        "needle-in-a-haystack",
        "32k",
        "depth-0"
      ],
      "files": 1,
      "bytes": 128669,
      "url": "/fixtures/haystacks/needle-32k-d000",
      "answers_url": "/fixtures/haystacks/needle-32k-d000/answers"
    },
    {
      "id": "needle-32k-d025",
      "subkind": "single",
      "title": "Single needle, 32k tokens, 25% depth",
      "tags": [
        "long-context",
        "needle-in-a-haystack",
        "32k",
        "depth-25"
      ],
      "files": 1,
      "bytes": 128689,
      "url": "/fixtures/haystacks/needle-32k-d025",
      "answers_url": "/fixtures/haystacks/needle-32k-d025/answers"
    },
    {
      "id": "needle-32k-d050",
      "subkind": "single",
      "title": "Single needle, 32k tokens, 50% depth",
      "tags": [
        "long-context",
        "needle-in-a-haystack",
        "32k",
        "depth-50"
      ],
      "files": 1,
      "bytes": 128661,
      "url": "/fixtures/haystacks/needle-32k-d050",
      "answers_url": "/fixtures/haystacks/needle-32k-d050/answers"
    },
    {
      "id": "needle-32k-d075",
      "subkind": "single",
      "title": "Single needle, 32k tokens, 75% depth",
      "tags": [
        "long-context",
        "needle-in-a-haystack",
        "32k",
        "depth-75"
      ],
      "files": 1,
      "bytes": 128663,
      "url": "/fixtures/haystacks/needle-32k-d075",
      "answers_url": "/fixtures/haystacks/needle-32k-d075/answers"
    },
    {
      "id": "needle-32k-d100",
      "subkind": "single",
      "title": "Single needle, 32k tokens, 100% depth",
      "tags": [
        "long-context",
        "needle-in-a-haystack",
        "32k",
        "depth-100"
      ],
      "files": 1,
      "bytes": 128710,
      "url": "/fixtures/haystacks/needle-32k-d100",
      "answers_url": "/fixtures/haystacks/needle-32k-d100/answers"
    }
  ],
  "bundle_bytes": 14677457,
  "bundle_sha256": "2c35f99b18f0bb2c9bc6ebdce9e4e5b1a88cee516a43a7d1999ce9ca109f4ea7"
}