{
  "protocol": {
    "study_id": "LAB-STREAMING-2026-10-12",
    "registered_at_utc": "2026-10-12T20:36:49.183379+00:00",
    "topic": "T05",
    "article_written": false,
    "question": "Where do title, description and canonical appear in the HTTP HTML and rendered browser DOM under three metadata modes?",
    "versions": {
      "next": "15.5.22",
      "react": "19.2.6",
      "react_dom": "19.2.6",
      "node": "v25.2.1"
    },
    "modes": [
      {
        "id": "static_default",
        "port": 8791,
        "path": "/static",
        "configuration": "default",
        "metadata": "static object"
      },
      {
        "id": "async_default",
        "port": 8791,
        "path": "/async",
        "configuration": "default",
        "metadata": "async generateMetadata; 250 ms artificial delay"
      },
      {
        "id": "async_blocking",
        "port": 8792,
        "path": "/async",
        "configuration": "htmlLimitedBots: /.*/",
        "metadata": "same async implementation; 250 ms artificial delay"
      }
    ],
    "profiles": [
      {
        "id": "browser_like",
        "label": "Browser-like HTTP profile",
        "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36"
      },
      {
        "id": "googlebot_ua",
        "label": "Googlebot User-Agent string only",
        "user_agent": "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
      },
      {
        "id": "twitterbot_ua",
        "label": "Twitterbot User-Agent string only",
        "user_agent": "Twitterbot/1.0"
      }
    ],
    "http_conditions": 9,
    "rounds": 2,
    "planned_http_observations": 18,
    "controls": [
      "Production builds only; same source, versions and machine for both configs",
      "Both routes force dynamic rendering; static refers to the metadata export, not a prerendered route",
      "No external data fetching, CDN, proxy or remote deployment",
      "Same async function in both configs",
      "Accept text/html; Accept-Encoding identity; no cookies or RSC/client-navigation headers",
      "Declared .test canonical URLs; noindex and nofollow fixture only"
    ],
    "collection": [
      "Capture HTTP status, headers, full response bytes and their SHA256",
      "Parse actual title/meta/link elements, excluding strings embedded in script payloads; record values, counts, source offset and head/body region",
      "Keep local read-chunk arrival timing as diagnostic evidence only; not a benchmark",
      "Repeat all 9 cells once in the same order; retain failures and any later retries separately",
      "Inspect three modes through the real connected browser, with the browser\u2019s actual received User-Agent displayed and recorded; do not claim DOM runs under spoofed bot identities"
    ],
    "expected_checks": [
      "One expected value for each of title, description and canonical in complete response",
      "Second HTTP round agrees with first on tag count, value and region",
      "Browser rendered DOM records head/body ancestry and screenshot for each mode; no assumption that it matches server HTML placement"
    ],
    "limits": [
      "Spoofed User-Agent does not reproduce Googlebot or Twitter crawler infrastructure",
      "Artificial delay exposes delivery behavior and does not represent production latency",
      "No indexing, ranking, AI citations, Core Web Vitals or speed advantage measured",
      "One installed Next.js version; no claim about every version",
      "DOM samples cover real-browser requests only, not all three HTTP profiles",
      "No client-side route transitions, cache components, CDN buffering or failure/error paths tested"
    ],
    "sources": [
      {
        "url": "https://nextjs.org/docs/app/api-reference/functions/generate-metadata#streaming-metadata",
        "checked": "2026-10-12",
        "note": "Current documentation describes streamed body metadata and blocking for HTML-limited user agents; tested against pinned installed version."
      },
      {
        "url": "https://nextjs.org/docs/app/api-reference/config/next-config-js/htmlLimitedBots",
        "checked": "2026-10-12",
        "note": "Custom regex overrides default list; /.*/ documented to disable metadata streaming."
      }
    ]
  },
  "analysis": {
    "study_id": "LAB-STREAMING-2026-10-12",
    "research_completed_at_utc": "2026-10-12T20:39:37.037539+00:00",
    "article_written": false,
    "versions": {
      "next": "15.5.22",
      "react": "19.2.6",
      "react_dom": "19.2.6",
      "node": "v25.2.1"
    },
    "conditions": 9,
    "successful_http_responses": 18,
    "rendered_browser_samples": 3,
    "matrix": [
      {
        "mode": "static_default",
        "profile": "browser_like",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "static_default",
        "profile": "googlebot_ua",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "static_default",
        "profile": "twitterbot_ua",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "async_default",
        "profile": "browser_like",
        "regions": {
          "title": "body",
          "description": "body",
          "canonical": "body"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "async_default",
        "profile": "googlebot_ua",
        "regions": {
          "title": "body",
          "description": "body",
          "canonical": "body"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "async_default",
        "profile": "twitterbot_ua",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "async_blocking",
        "profile": "browser_like",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "async_blocking",
        "profile": "googlebot_ua",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        },
        "values_verified": true,
        "repeat_agrees": true
      },
      {
        "mode": "async_blocking",
        "profile": "twitterbot_ua",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        },
        "values_verified": true,
        "repeat_agrees": true
      }
    ],
    "browser_dom": [
      {
        "mode": "static_default",
        "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        }
      },
      {
        "mode": "async_default",
        "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36",
        "regions": {
          "title": "body",
          "description": "body",
          "canonical": "body"
        }
      },
      {
        "mode": "async_blocking",
        "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36",
        "regions": {
          "title": "head",
          "description": "head",
          "canonical": "head"
        }
      }
    ],
    "tag_values_and_counts_correct_in_all_responses": true,
    "repeat_agreement_cells": 9,
    "limits": [
      "Spoofed User-Agent does not reproduce Googlebot or Twitter crawler infrastructure",
      "Artificial delay exposes delivery behavior and does not represent production latency",
      "No indexing, ranking, AI citations, Core Web Vitals or speed advantage measured",
      "One installed Next.js version; no claim about every version",
      "DOM samples cover real-browser requests only, not all three HTTP profiles",
      "No client-side route transitions, cache components, CDN buffering or failure/error paths tested"
    ],
    "interpretation": [
      "The default async case placed all three tags in body for browser-like and Googlebot-UA HTTP requests; Twitterbot-UA got head.",
      "Static metadata and async metadata with htmlLimitedBots /.*/ placed all three tags in head for every tested HTTP profile.",
      "The actual browser DOM kept async default tags in body; tags were in head for the other two modes. The actual UA differs from the browser-like collector profile.",
      "No inference about Google accepting a body canonical. Next.js streaming guidance and Google canonical head-only requirement must be presented together.",
      "No performance benchmark from artificial-delay localhost chunk timing."
    ]
  },
  "sources": [
    {
      "claim": "Default async behavior and bot-dependent metadata delivery",
      "url": "https://nextjs.org/docs/app/api-reference/functions/generate-metadata#streaming-metadata",
      "checked": "2026-10-12",
      "status": "framework documentation; own pinned-version observations agree on placement; search interpretation not tested"
    },
    {
      "claim": "htmlLimitedBots override replaces the default regex; /.*/ disables streaming metadata",
      "url": "https://nextjs.org/docs/app/api-reference/config/next-config-js/htmlLimitedBots",
      "checked": "2026-10-12",
      "status": "documented and placement effect reproduced for three profiles"
    },
    {
      "claim": "Google says the canonical HTML link is accepted in head; body placement cannot be declared safe from this experiment",
      "url": "https://developers.google.com/search/docs/crawling-indexing/consolidate-duplicate-urls#rel-canonical-link-method",
      "checked": "2026-10-12",
      "status": "primary platform requirement; applicability to actual indexed fixture not tested"
    },
    {
      "claim": "Google JS canonical example appends to document.head and cautions about conflicting or multiple canonicals",
      "url": "https://developers.google.com/search/docs/crawling-indexing/javascript/javascript-seo-basics#properly-inject-canonical-link-tag",
      "checked": "2026-10-12",
      "status": "primary guidance; not a separate experiment"
    },
    {
      "claim": "Valid head markup matters for metadata processing",
      "url": "https://developers.google.com/search/docs/crawling-indexing/valid-page-metadata",
      "checked": "2026-10-12",
      "status": "background primary reference"
    }
  ],
  "http-observations": {
    "study_id": "LAB-STREAMING-2026-10-12",
    "observations": [
      {
        "id": "static_default--browser_like--r1",
        "mode": "static_default",
        "profile": "browser_like",
        "round": 1,
        "captured_at_utc": "2026-10-12T20:38:32.309456+00:00",
        "request": {
          "url": "http://127.0.0.1:8791/static",
          "headers": {
            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36",
            "Accept": "text/html",
            "Accept-Encoding": "identity",
            "Connection": "close"
          }
        },
        "status": 200,
        "response_headers": [
          [
            "Vary",
            "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding"
          ],
          [
            "X-Powered-By",
            "Next.js"
          ],
          [
            "Cache-Control",
            "private, no-cache, no-store, max-age=0, must-revalidate"
          ],
          [
            "Content-Type",
            "text/html; charset=utf-8"
          ],
          [
            "Date",
            "Mon, 12 Oct 2026 20:38:32 GMT"
          ],
          [
            "Connection",
            "close"
          ],
          [
            "Transfer-Encoding",
            "chunked"
          ]
        ],
        "headers_received_ms": 9.36,
        "body_file": "evidence/http/static_default--browser_like--r1.html",
        "body_sha256": "93f2c6a5571c661cb54d6366ef76abee51b870cef629b05814c83e2424acff50",
        "body_bytes": 6725,
        "read_chunks": [
          {
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            "end_byte": 1706,
            "received_ms": 9.39
          },
          {
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            "end_byte": 1766,
            "received_ms": 9.7
          },
          {
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            "end_byte": 2052,
            "received_ms": 9.7
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            "received_ms": 9.71
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            "end_byte": 6083,
            "received_ms": 9.71
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            "end_byte": 6711,
            "received_ms": 9.71
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            "end_byte": 6725,
            "received_ms": 9.72
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        ],
        "tags": [
          {
            "field": "title",
            "region": "head",
            "value": "Static metadata control",
            "character_offset": 478
          },
          {
            "field": "description",
            "region": "head",
            "value": "Static metadata control description.",
            "character_offset": 516
          },
          {
            "field": "canonical",
            "region": "head",
            "value": "https://metadata.example.test/static",
            "character_offset": 638
          }
        ],
        "complete_response_ms": 10.51
      },
      {
        "id": "static_default--googlebot_ua--r1",
        "mode": "static_default",
        "profile": "googlebot_ua",
        "round": 1,
        "captured_at_utc": "2026-10-12T20:38:32.320663+00:00",
        "request": {
          "url": "http://127.0.0.1:8791/static",
          "headers": {
            "User-Agent": "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)",
            "Accept": "text/html",
            "Accept-Encoding": "identity",
            "Connection": "close"
          }
        },
        "status": 200,
        "response_headers": [
          [
            "Vary",
            "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding"
          ],
          [
            "X-Powered-By",
            "Next.js"
          ],
          [
            "Cache-Control",
            "private, no-cache, no-store, max-age=0, must-revalidate"
          ],
          [
            "Content-Type",
            "text/html; charset=utf-8"
          ],
          [
            "Date",
            "Mon, 12 Oct 2026 20:38:32 GMT"
          ],
          [
            "Connection",
            "close"
          ],
          [
            "Transfer-Encoding",
            "chunked"
          ]
        ],
        "headers_received_ms": 3.27,
        "body_file": "evidence/http/static_default--googlebot_ua--r1.html",
        "body_sha256": "522417ca3370cafc9f10b18e0487009496c13deda7223a8af8c219d2700d5a28",
        "body_bytes": 6635,
        "read_chunks": [
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            "end_byte": 1661,
            "received_ms": 3.28
          },
          {
            "start_byte": 1661,
            "end_byte": 1721,
            "received_ms": 3.64
          },
          {
            "start_byte": 1721,
            "end_byte": 2007,
            "received_ms": 3.65
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          {
            "start_byte": 2007,
            "end_byte": 4994,
            "received_ms": 3.65
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          {
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            "end_byte": 5993,
            "received_ms": 3.65
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            "end_byte": 6621,
            "received_ms": 3.65
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          {
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            "end_byte": 6635,
            "received_ms": 3.66
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        ],
        "tags": [
          {
            "field": "title",
            "region": "head",
            "value": "Static metadata control",
            "character_offset": 478
          },
          {
            "field": "description",
            "region": "head",
            "value": "Static metadata control description.",
            "character_offset": 516
          },
          {
            "field": "canonical",
            "region": "head",
            "value": "https://metadata.example.test/static",
            "character_offset": 638
          }
        ],
        "complete_response_ms": 4.16
      },
      {
        "id": "static_default--twitterbot_ua--r1",
        "mode": "static_default",
        "profile": "twitterbot_ua",
        "round": 1,
        "captured_at_utc": "2026-10-12T20:38:32.325249+00:00",
        "request": {
          "url": "http://127.0.0.1:8791/static",
          "headers": {
            "User-Agent": "Twitterbot/1.0",
            "Accept": "text/html",
            "Accept-Encoding": "identity",
            "Connection": "close"
          }
        },
        "status": 200,
        "response_headers": [
          [
            "Vary",
            "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding"
          ],
          [
            "X-Powered-By",
            "Next.js"
          ],
          [
            "Cache-Control",
            "private, no-cache, no-store, max-age=0, must-revalidate"
          ],
          [
            "Content-Type",
            "text/html; charset=utf-8"
          ],
          [
            "Date",
            "Mon, 12 Oct 2026 20:38:32 GMT"
          ],
          [
            "Connection",
            "close"
          ],
          [
            "Transfer-Encoding",
            "chunked"
          ]
        ],
        "headers_received_ms": 3.02,
        "body_file": "evidence/http/static_default--twitterbot_ua--r1.html",
        "body_sha256": "7e47aa79d1dcd130dd573a08c9f669c902e6119a3b459b1688fd9c158122d8fa",
        "body_bytes": 6195,
        "read_chunks": [
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            "end_byte": 1548,
            "received_ms": 3.03
          },
          {
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            "end_byte": 1608,
            "received_ms": 3.39
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            "received_ms": 3.39
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            "received_ms": 3.4
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            "received_ms": 3.4
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            "received_ms": 3.4
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        ],
        "tags": [
          {
            "field": "title",
            "region": "head",
            "value": "Static metadata control",
            "character_offset": 478
          },
          {
            "field": "description",
            "region": "head",
            "value": "Static metadata control description.",
            "character_offset": 516
          },
          {
            "field": "canonical",
            "region": "head",
            "value": "https://metadata.example.test/static",
            "character_offset": 638
          }
        ],
        "complete_response_ms": 3.94
      },
      {
        "id": "async_default--browser_like--r1",
        "mode": "async_default",
        "profile": "browser_like",
        "round": 1,
        "captured_at_utc": "2026-10-12T20:38:32.329990+00:00",
        "request": {
          "url": "http://127.0.0.1:8791/async",
          "headers": {
            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36",
            "Accept": "text/html",
            "Accept-Encoding": "identity",
            "Connection": "close"
          }
        },
        "status": 200,
        "response_headers": [
          [
            "Vary",
            "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding"
          ],
          [
            "X-Powered-By",
            "Next.js"
          ],
          [
            "Cache-Control",
            "private, no-cache, no-store, max-age=0, must-revalidate"
          ],
          [
            "Content-Type",
            "text/html; charset=utf-8"
          ],
          [
            "Date",
            "Mon, 12 Oct 2026 20:38:32 GMT"
          ],
          [
            "Connection",
            "close"
          ],
          [
            "Transfer-Encoding",
            "chunked"
          ]
        ],
        "headers_received_ms": 3.32,
        "body_file": "evidence/http/async_default--browser_like--r1.html",
        "body_sha256": "b1771fb3982092c5acf1c25a0afdf8ff8d19bb0047d87c08afdf819502861989",
        "body_bytes": 7888,
        "read_chunks": [
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            "received_ms": 3.35
          },
          {
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            "end_byte": 1683,
            "received_ms": 3.4
          },
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            "end_byte": 1969,
            "received_ms": 3.4
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            "end_byte": 4953,
            "received_ms": 3.4
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            "received_ms": 3.41
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            "received_ms": 3.41
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            "received_ms": 255.98
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            "end_byte": 7874,
            "received_ms": 256.99
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          {
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            "end_byte": 7888,
            "received_ms": 257.0
          }
        ],
        "tags": [
          {
            "field": "title",
            "region": "body",
            "value": "Asynchronous metadata control",
            "character_offset": 6683
          },
          {
            "field": "description",
            "region": "body",
            "value": "Asynchronous metadata control description.",
            "character_offset": 6727
          },
          {
            "field": "canonical",
            "region": "body",
            "value": "https://metadata.example.test/async",
            "character_offset": 6855
          }
        ],
        "complete_response_ms": 258.64
      },
      {
        "id": "async_default--googlebot_ua--r1",
        "mode": "async_default",
        "profile": "googlebot_ua",
        "round": 1,
        "captured_at_utc": "2026-10-12T20:38:32.590615+00:00",
        "request": {
          "url": "http://127.0.0.1:8791/async",
          "headers": {
            "User-Agent": "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)",
            "Accept": "text/html",
            "Accept-Encoding": "identity",
            "Connection": "close"
          }
        },
        "status": 200,
        "response_headers": [
          [
            "Vary",
            "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding"
          ],
          [
            "X-Powered-By",
            "Next.js"
          ],
          [
            "Cache-Control",
            "private, no-cache, no-store, max-age=0, must-revalidate"
          ],
          [
            "Content-Type",
            "text/html; charset=utf-8"
          ],
          [
            "Date",
            "Mon, 12 Oct 2026 20:38:32 GMT"
          ],
          [
            "Connection",
            "close"
          ],
          [
            "Transfer-Encoding",
            "chunked"
          ]
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        "complete_response_ms": 256.51
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        "id": "async_default--twitterbot_ua--r2",
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        "profile": "twitterbot_ua",
        "round": 2,
        "captured_at_utc": "2026-10-12T20:38:34.476172+00:00",
        "request": {
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          "headers": {
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        },
        "status": 200,
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        ],
        "headers_received_ms": 259.7,
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        "request": {
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        ],
        "headers_received_ms": 263.8,
        "body_file": "evidence/http/async_blocking--browser_like--r2.html",
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        "request": {
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        "request": {
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            "value": "https://metadata.example.test/async",
            "character_offset": 650
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        ],
        "complete_response_ms": 264.48
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  "dom-observations": {
    "scope": "Three actual connected browser loads; no bot-UA DOM emulation",
    "observations": [
      {
        "id": "static_default",
        "captured_at": "2026-10-12T20:38:22.132Z",
        "url": "http://127.0.0.1:8791/static",
        "body": "<body style=\"font-family:system-ui;max-width:900px;margin:40px auto;padding:24px;line-height:1.6\"><div hidden=\"\"><!--$--><!--/$--></div><main><p>NEAPTIDE \u00b7 LOCAL RESEARCH FIXTURE \u00b7 NEXT.JS 15.5.22</p><h1>Streaming metadata: <!-- -->static object</h1><p id=\"shell-marker\">The page content is ready. Metadata uses a static object or a controlled 250 ms asynchronous delay.</p><dl><dt>Configuration</dt><dd id=\"configuration\">default</dd><dt>Received User-Agent</dt><dd id=\"received-user-agent\" style=\"overflow-wrap:anywhere\">Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36</dd></dl><p>Inspect the full response and rendered document separately. This fixture does not measure search indexing or performance in production.</p></main><!--$--><!--/$--><script src=\"/_next/static/chunks/webpack-078f6dfb37dff419.js\" id=\"_R_\" async=\"\"></script><script>(self.__next_f=self.__next_f||[]).push([0])</script><script>self.__next_f.push([1,\"1:\\\"$Sreact.fragment\\\"\\n2:I[6082,[],\\\"\\\"]\\n3:I[4304,[],\\\"\\\"]\\n5:I[523,[],\\\"OutletBoundary\\\"]\\n7:I[1962,[],\\\"AsyncMetadataOutlet\\\"]\\n9:I[523,[],\\\"ViewportBoundary\\\"]\\nb:I[523,[],\\\"MetadataBoundary\\\"]\\nc:\\\"$Sreact.suspense\\\"\\ne:I[6765,[],\\\"\\\"]\\n\"])</script><script>self.__next_f.push([1,\"0:{\\\"P\\\":null,\\\"b\\\":\\\"VZa4zi3-4B-qxcZdPKyZ1\\\",\\\"p\\\":\\\"\\\",\\\"c\\\":[\\\"\\\",\\\"static\\\"],\\\"i\\\":false,\\\"f\\\":[[[\\\"\\\",{\\\"children\\\":[\\\"static\\\",{\\\"children\\\":[\\\"__PAGE__\\\",{}]}]},\\\"$undefined\\\",\\\"$undefined\\\",true],[\\\"\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[null,[\\\"$\\\",\\\"html\\\",null,{\\\"lang\\\":\\\"en\\\",\\\"children\\\":[\\\"$\\\",\\\"body\\\",null,{\\\"style\\\":{\\\"fontFamily\\\":\\\"system-ui\\\",\\\"maxWidth\\\":900,\\\"margin\\\":\\\"40px auto\\\",\\\"padding\\\":24,\\\"lineHeight\\\":1.6},\\\"children\\\":[\\\"$\\\",\\\"$L2\\\",null,{\\\"parallelRouterKey\\\":\\\"children\\\",\\\"error\\\":\\\"$undefined\\\",\\\"errorStyles\\\":\\\"$undefined\\\",\\\"errorScripts\\\":\\\"$undefined\\\",\\\"template\\\":[\\\"$\\\",\\\"$L3\\\",null,{}],\\\"templateStyles\\\":\\\"$undefined\\\",\\\"templateScripts\\\":\\\"$undefined\\\",\\\"notFound\\\":[[[\\\"$\\\",\\\"title\\\",null,{\\\"children\\\":\\\"404: This page could not be found.\\\"}],[\\\"$\\\",\\\"div\\\",null,{\\\"style\\\":{\\\"fontFamily\\\":\\\"system-ui,\\\\\\\"Segoe UI\\\\\\\",Roboto,Helvetica,Arial,sans-serif,\\\\\\\"Apple Color Emoji\\\\\\\",\\\\\\\"Segoe UI Emoji\\\\\\\"\\\",\\\"height\\\":\\\"100vh\\\",\\\"textAlign\\\":\\\"center\\\",\\\"display\\\":\\\"flex\\\",\\\"flexDirection\\\":\\\"column\\\",\\\"alignItems\\\":\\\"center\\\",\\\"justifyContent\\\":\\\"center\\\"},\\\"children\\\":[\\\"$\\\",\\\"div\\\",null,{\\\"children\\\":[[\\\"$\\\",\\\"style\\\",null,{\\\"dangerouslySetInnerHTML\\\":{\\\"__html\\\":\\\"body{color:#000;background:#fff;margin:0}.next-error-h1{border-right:1px solid rgba(0,0,0,.3)}@media (prefers-color-scheme:dark){body{color:#fff;background:#000}.next-error-h1{border-right:1px solid rgba(255,255,255,.3)}}\\\"}}],[\\\"$\\\",\\\"h1\\\",null,{\\\"className\\\":\\\"next-error-h1\\\",\\\"style\\\":{\\\"display\\\":\\\"inline-block\\\",\\\"margin\\\":\\\"0 20px 0 0\\\",\\\"padding\\\":\\\"0 23px 0 0\\\",\\\"fontSize\\\":24,\\\"fontWeight\\\":500,\\\"verticalAlign\\\":\\\"top\\\",\\\"lineHeight\\\":\\\"49px\\\"},\\\"children\\\":404}],[\\\"$\\\",\\\"div\\\",null,{\\\"style\\\":{\\\"display\\\":\\\"inline-block\\\"},\\\"children\\\":[\\\"$\\\",\\\"h2\\\",null,{\\\"style\\\":{\\\"fontSize\\\":14,\\\"fontWeight\\\":400,\\\"lineHeight\\\":\\\"49px\\\",\\\"margin\\\":0},\\\"children\\\":\\\"This page could not be found.\\\"}]}]]}]}]],[]],\\\"forbidden\\\":\\\"$undefined\\\",\\\"unauthorized\\\":\\\"$undefined\\\"}]}]}]]}],{\\\"children\\\":[\\\"static\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[null,[\\\"$\\\",\\\"$L2\\\",null,{\\\"parallelRouterKey\\\":\\\"children\\\",\\\"error\\\":\\\"$undefined\\\",\\\"errorStyles\\\":\\\"$undefined\\\",\\\"errorScripts\\\":\\\"$undefined\\\",\\\"template\\\":[\\\"$\\\",\\\"$L3\\\",null,{}],\\\"templateStyles\\\":\\\"$undefined\\\",\\\"templateScripts\\\":\\\"$undefined\\\",\\\"notFound\\\":\\\"$undefined\\\",\\\"forbidden\\\":\\\"$undefined\\\",\\\"unauthorized\\\":\\\"$undefined\\\"}]]}],{\\\"children\\\":[\\\"__PAGE__\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[\\\"$L4\\\",null,[\\\"$\\\",\\\"$L5\\\",null,{\\\"children\\\":[\\\"$L6\\\",[\\\"$\\\",\\\"$L7\\\",null,{\\\"promise\\\":\\\"$@8\\\"}]]}]]}],{},null,false]},null,false]},null,false],[\\\"$\\\",\\\"$1\\\",\\\"h\\\",{\\\"children\\\":[null,[[\\\"$\\\",\\\"$L9\\\",null,{\\\"children\\\":\\\"$La\\\"}],null],[\\\"$\\\",\\\"$Lb\\\",null,{\\\"children\\\":[\\\"$\\\",\\\"div\\\",null,{\\\"hidden\\\":true,\\\"children\\\":[\\\"$\\\",\\\"$c\\\",null,{\\\"fallback\\\":null,\\\"children\\\":\\\"$Ld\\\"}]}]}]]}],false]],\\\"m\\\":\\\"$undefined\\\",\\\"G\\\":[\\\"$e\\\",[]],\\\"s\\\":false,\\\"S\\\":false}\\n\"])</script><script>self.__next_f.push([1,\"4:[\\\"$\\\",\\\"main\\\",null,{\\\"children\\\":[[\\\"$\\\",\\\"p\\\",null,{\\\"children\\\":\\\"NEAPTIDE \u00b7 LOCAL RESEARCH FIXTURE \u00b7 NEXT.JS 15.5.22\\\"}],[\\\"$\\\",\\\"h1\\\",null,{\\\"children\\\":[\\\"Streaming metadata: \\\",\\\"static object\\\"]}],[\\\"$\\\",\\\"p\\\",null,{\\\"id\\\":\\\"shell-marker\\\",\\\"children\\\":\\\"The page content is ready. 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        "configuration": "default",
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        "tags": [
          {
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            "html": "<meta name=\"description\" content=\"Static metadata control description.\">",
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            "tag": "META",
            "value": "Static metadata control description."
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          {
            "field": "canonical",
            "html": "<link rel=\"canonical\" href=\"https://metadata.example.test/static\">",
            "parent": "HEAD",
            "region": "head",
            "tag": "LINK",
            "value": "https://metadata.example.test/static"
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        "title": "Static metadata control",
        "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36"
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        "captured_at": "2026-10-12T20:38:22.537Z",
        "url": "http://127.0.0.1:8791/async",
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This fixture does not measure search indexing or performance in production.</p></main><!--$~--><template id=\"B:1\"></template><!--/$--><script>requestAnimationFrame(function(){$RT=performance.now()});</script><script src=\"/_next/static/chunks/webpack-078f6dfb37dff419.js\" id=\"_R_\" async=\"\"></script><script>(self.__next_f=self.__next_f||[]).push([0])</script><script>self.__next_f.push([1,\"1:\\\"$Sreact.fragment\\\"\\n2:I[6082,[],\\\"\\\"]\\n3:I[4304,[],\\\"\\\"]\\n5:I[523,[],\\\"OutletBoundary\\\"]\\n7:I[1962,[],\\\"AsyncMetadataOutlet\\\"]\\n9:I[523,[],\\\"ViewportBoundary\\\"]\\nb:I[523,[],\\\"MetadataBoundary\\\"]\\nc:\\\"$Sreact.suspense\\\"\\ne:I[6765,[],\\\"\\\"]\\n\"])</script><script>self.__next_f.push([1,\"0:{\\\"P\\\":null,\\\"b\\\":\\\"VZa4zi3-4B-qxcZdPKyZ1\\\",\\\"p\\\":\\\"\\\",\\\"c\\\":[\\\"\\\",\\\"async\\\"],\\\"i\\\":false,\\\"f\\\":[[[\\\"\\\",{\\\"children\\\":[\\\"async\\\",{\\\"children\\\":[\\\"__PAGE__\\\",{}]}]},\\\"$undefined\\\",\\\"$undefined\\\",true],[\\\"\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[null,[\\\"$\\\",\\\"html\\\",null,{\\\"lang\\\":\\\"en\\\",\\\"children\\\":[\\\"$\\\",\\\"body\\\",null,{\\\"style\\\":{\\\"fontFamily\\\":\\\"system-ui\\\",\\\"maxWidth\\\":900,\\\"margin\\\":\\\"40px auto\\\",\\\"padding\\\":24,\\\"lineHeight\\\":1.6},\\\"children\\\":[\\\"$\\\",\\\"$L2\\\",null,{\\\"parallelRouterKey\\\":\\\"children\\\",\\\"error\\\":\\\"$undefined\\\",\\\"errorStyles\\\":\\\"$undefined\\\",\\\"errorScripts\\\":\\\"$undefined\\\",\\\"template\\\":[\\\"$\\\",\\\"$L3\\\",null,{}],\\\"templateStyles\\\":\\\"$undefined\\\",\\\"templateScripts\\\":\\\"$undefined\\\",\\\"notFound\\\":[[[\\\"$\\\",\\\"title\\\",null,{\\\"children\\\":\\\"404: This page could not be found.\\\"}],[\\\"$\\\",\\\"div\\\",null,{\\\"style\\\":{\\\"fontFamily\\\":\\\"system-ui,\\\\\\\"Segoe UI\\\\\\\",Roboto,Helvetica,Arial,sans-serif,\\\\\\\"Apple Color Emoji\\\\\\\",\\\\\\\"Segoe UI Emoji\\\\\\\"\\\",\\\"height\\\":\\\"100vh\\\",\\\"textAlign\\\":\\\"center\\\",\\\"display\\\":\\\"flex\\\",\\\"flexDirection\\\":\\\"column\\\",\\\"alignItems\\\":\\\"center\\\",\\\"justifyContent\\\":\\\"center\\\"},\\\"children\\\":[\\\"$\\\",\\\"div\\\",null,{\\\"children\\\":[[\\\"$\\\",\\\"style\\\",null,{\\\"dangerouslySetInnerHTML\\\":{\\\"__html\\\":\\\"body{color:#000;background:#fff;margin:0}.next-error-h1{border-right:1px solid rgba(0,0,0,.3)}@media (prefers-color-scheme:dark){body{color:#fff;background:#000}.next-error-h1{border-right:1px solid rgba(255,255,255,.3)}}\\\"}}],[\\\"$\\\",\\\"h1\\\",null,{\\\"className\\\":\\\"next-error-h1\\\",\\\"style\\\":{\\\"display\\\":\\\"inline-block\\\",\\\"margin\\\":\\\"0 20px 0 0\\\",\\\"padding\\\":\\\"0 23px 0 0\\\",\\\"fontSize\\\":24,\\\"fontWeight\\\":500,\\\"verticalAlign\\\":\\\"top\\\",\\\"lineHeight\\\":\\\"49px\\\"},\\\"children\\\":404}],[\\\"$\\\",\\\"div\\\",null,{\\\"style\\\":{\\\"display\\\":\\\"inline-block\\\"},\\\"children\\\":[\\\"$\\\",\\\"h2\\\",null,{\\\"style\\\":{\\\"fontSize\\\":14,\\\"fontWeight\\\":400,\\\"lineHeight\\\":\\\"49px\\\",\\\"margin\\\":0},\\\"children\\\":\\\"This page could not be found.\\\"}]}]]}]}]],[]],\\\"forbidden\\\":\\\"$undefined\\\",\\\"unauthorized\\\":\\\"$undefined\\\"}]}]}]]}],{\\\"children\\\":[\\\"async\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[null,[\\\"$\\\",\\\"$L2\\\",null,{\\\"parallelRouterKey\\\":\\\"children\\\",\\\"error\\\":\\\"$undefined\\\",\\\"errorStyles\\\":\\\"$undefined\\\",\\\"errorScripts\\\":\\\"$undefined\\\",\\\"template\\\":[\\\"$\\\",\\\"$L3\\\",null,{}],\\\"templateStyles\\\":\\\"$undefined\\\",\\\"templateScripts\\\":\\\"$undefined\\\",\\\"notFound\\\":\\\"$undefined\\\",\\\"forbidden\\\":\\\"$undefined\\\",\\\"unauthorized\\\":\\\"$undefined\\\"}]]}],{\\\"children\\\":[\\\"__PAGE__\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[\\\"$L4\\\",null,[\\\"$\\\",\\\"$L5\\\",null,{\\\"children\\\":[\\\"$L6\\\",[\\\"$\\\",\\\"$L7\\\",null,{\\\"promise\\\":\\\"$@8\\\"}]]}]]}],{},null,false]},null,false]},null,false],[\\\"$\\\",\\\"$1\\\",\\\"h\\\",{\\\"children\\\":[null,[[\\\"$\\\",\\\"$L9\\\",null,{\\\"children\\\":\\\"$La\\\"}],null],[\\\"$\\\",\\\"$Lb\\\",null,{\\\"children\\\":[\\\"$\\\",\\\"div\\\",null,{\\\"hidden\\\":true,\\\"children\\\":[\\\"$\\\",\\\"$c\\\",null,{\\\"fallback\\\":null,\\\"children\\\":\\\"$Ld\\\"}]}]}]]}],false]],\\\"m\\\":\\\"$undefined\\\",\\\"G\\\":[\\\"$e\\\",[]],\\\"s\\\":false,\\\"S\\\":false}\\n\"])</script><script>self.__next_f.push([1,\"4:[\\\"$\\\",\\\"main\\\",null,{\\\"children\\\":[[\\\"$\\\",\\\"p\\\",null,{\\\"children\\\":\\\"NEAPTIDE \u00b7 LOCAL RESEARCH FIXTURE \u00b7 NEXT.JS 15.5.22\\\"}],[\\\"$\\\",\\\"h1\\\",null,{\\\"children\\\":[\\\"Streaming metadata: \\\",\\\"asynchronous function\\\"]}],[\\\"$\\\",\\\"p\\\",null,{\\\"id\\\":\\\"shell-marker\\\",\\\"children\\\":\\\"The page content is ready. 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        "configuration": "default",
        "head": "<head><meta charset=\"utf-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"><link rel=\"preload\" as=\"script\" fetchpriority=\"low\" href=\"/_next/static/chunks/webpack-078f6dfb37dff419.js\"><script src=\"/_next/static/chunks/0937d497-44abb0f9355ace92.js\" async=\"\"></script><script src=\"/_next/static/chunks/89-9ed32d6006a2b0d7.js\" async=\"\"></script><script src=\"/_next/static/chunks/main-app-7f103afb963e4061.js\" async=\"\"></script><script src=\"/_next/static/chunks/polyfills-42372ed130431b0a.js\" nomodule=\"\"></script></head>",
        "tags": [
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            "tag": "TITLE",
            "value": "Asynchronous metadata control"
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          {
            "field": "description",
            "html": "<meta name=\"description\" content=\"Asynchronous metadata control description.\">",
            "parent": "BODY",
            "region": "body",
            "tag": "META",
            "value": "Asynchronous metadata control description."
          },
          {
            "field": "canonical",
            "html": "<link rel=\"canonical\" href=\"https://metadata.example.test/async\">",
            "parent": "BODY",
            "region": "body",
            "tag": "LINK",
            "value": "https://metadata.example.test/async"
          }
        ],
        "title": "Asynchronous metadata control",
        "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36"
      },
      {
        "id": "async_blocking",
        "captured_at": "2026-10-12T20:38:41.529Z",
        "url": "http://127.0.0.1:8792/async",
        "body": "<body style=\"font-family:system-ui;max-width:900px;margin:40px auto;padding:24px;line-height:1.6\"><main><p>NEAPTIDE \u00b7 LOCAL RESEARCH FIXTURE \u00b7 NEXT.JS 15.5.22</p><h1>Streaming metadata: <!-- -->asynchronous function</h1><p id=\"shell-marker\">The page content is ready. Metadata uses a static object or a controlled 250 ms asynchronous delay.</p><dl><dt>Configuration</dt><dd id=\"configuration\">blocking</dd><dt>Received User-Agent</dt><dd id=\"received-user-agent\" style=\"overflow-wrap:anywhere\">Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36</dd></dl><p>Inspect the full response and rendered document separately. This fixture does not measure search indexing or performance in production.</p></main><script src=\"/_next/static/chunks/webpack-078f6dfb37dff419.js\" id=\"_R_\" async=\"\"></script><script>(self.__next_f=self.__next_f||[]).push([0])</script><script>self.__next_f.push([1,\"1:\\\"$Sreact.fragment\\\"\\n2:I[6082,[],\\\"\\\"]\\n3:I[4304,[],\\\"\\\"]\\n5:I[523,[],\\\"OutletBoundary\\\"]\\n8:I[523,[],\\\"ViewportBoundary\\\"]\\na:I[523,[],\\\"MetadataBoundary\\\"]\\nc:I[6765,[],\\\"\\\"]\\n\"])</script><script>self.__next_f.push([1,\"0:{\\\"P\\\":null,\\\"b\\\":\\\"Q097TVSxAgsQVQ-mzqAYW\\\",\\\"p\\\":\\\"\\\",\\\"c\\\":[\\\"\\\",\\\"async\\\"],\\\"i\\\":false,\\\"f\\\":[[[\\\"\\\",{\\\"children\\\":[\\\"async\\\",{\\\"children\\\":[\\\"__PAGE__\\\",{}]}]},\\\"$undefined\\\",\\\"$undefined\\\",true],[\\\"\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[null,[\\\"$\\\",\\\"html\\\",null,{\\\"lang\\\":\\\"en\\\",\\\"children\\\":[\\\"$\\\",\\\"body\\\",null,{\\\"style\\\":{\\\"fontFamily\\\":\\\"system-ui\\\",\\\"maxWidth\\\":900,\\\"margin\\\":\\\"40px auto\\\",\\\"padding\\\":24,\\\"lineHeight\\\":1.6},\\\"children\\\":[\\\"$\\\",\\\"$L2\\\",null,{\\\"parallelRouterKey\\\":\\\"children\\\",\\\"error\\\":\\\"$undefined\\\",\\\"errorStyles\\\":\\\"$undefined\\\",\\\"errorScripts\\\":\\\"$undefined\\\",\\\"template\\\":[\\\"$\\\",\\\"$L3\\\",null,{}],\\\"templateStyles\\\":\\\"$undefined\\\",\\\"templateScripts\\\":\\\"$undefined\\\",\\\"notFound\\\":[[[\\\"$\\\",\\\"title\\\",null,{\\\"children\\\":\\\"404: This page could not be found.\\\"}],[\\\"$\\\",\\\"div\\\",null,{\\\"style\\\":{\\\"fontFamily\\\":\\\"system-ui,\\\\\\\"Segoe UI\\\\\\\",Roboto,Helvetica,Arial,sans-serif,\\\\\\\"Apple Color Emoji\\\\\\\",\\\\\\\"Segoe UI Emoji\\\\\\\"\\\",\\\"height\\\":\\\"100vh\\\",\\\"textAlign\\\":\\\"center\\\",\\\"display\\\":\\\"flex\\\",\\\"flexDirection\\\":\\\"column\\\",\\\"alignItems\\\":\\\"center\\\",\\\"justifyContent\\\":\\\"center\\\"},\\\"children\\\":[\\\"$\\\",\\\"div\\\",null,{\\\"children\\\":[[\\\"$\\\",\\\"style\\\",null,{\\\"dangerouslySetInnerHTML\\\":{\\\"__html\\\":\\\"body{color:#000;background:#fff;margin:0}.next-error-h1{border-right:1px solid rgba(0,0,0,.3)}@media (prefers-color-scheme:dark){body{color:#fff;background:#000}.next-error-h1{border-right:1px solid rgba(255,255,255,.3)}}\\\"}}],[\\\"$\\\",\\\"h1\\\",null,{\\\"className\\\":\\\"next-error-h1\\\",\\\"style\\\":{\\\"display\\\":\\\"inline-block\\\",\\\"margin\\\":\\\"0 20px 0 0\\\",\\\"padding\\\":\\\"0 23px 0 0\\\",\\\"fontSize\\\":24,\\\"fontWeight\\\":500,\\\"verticalAlign\\\":\\\"top\\\",\\\"lineHeight\\\":\\\"49px\\\"},\\\"children\\\":404}],[\\\"$\\\",\\\"div\\\",null,{\\\"style\\\":{\\\"display\\\":\\\"inline-block\\\"},\\\"children\\\":[\\\"$\\\",\\\"h2\\\",null,{\\\"style\\\":{\\\"fontSize\\\":14,\\\"fontWeight\\\":400,\\\"lineHeight\\\":\\\"49px\\\",\\\"margin\\\":0},\\\"children\\\":\\\"This page could not be found.\\\"}]}]]}]}]],[]],\\\"forbidden\\\":\\\"$undefined\\\",\\\"unauthorized\\\":\\\"$undefined\\\"}]}]}]]}],{\\\"children\\\":[\\\"async\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[null,[\\\"$\\\",\\\"$L2\\\",null,{\\\"parallelRouterKey\\\":\\\"children\\\",\\\"error\\\":\\\"$undefined\\\",\\\"errorStyles\\\":\\\"$undefined\\\",\\\"errorScripts\\\":\\\"$undefined\\\",\\\"template\\\":[\\\"$\\\",\\\"$L3\\\",null,{}],\\\"templateStyles\\\":\\\"$undefined\\\",\\\"templateScripts\\\":\\\"$undefined\\\",\\\"notFound\\\":\\\"$undefined\\\",\\\"forbidden\\\":\\\"$undefined\\\",\\\"unauthorized\\\":\\\"$undefined\\\"}]]}],{\\\"children\\\":[\\\"__PAGE__\\\",[\\\"$\\\",\\\"$1\\\",\\\"c\\\",{\\\"children\\\":[\\\"$L4\\\",null,[\\\"$\\\",\\\"$L5\\\",null,{\\\"children\\\":[\\\"$L6\\\",\\\"$L7\\\"]}]]}],{},null,false]},null,false]},null,false],[\\\"$\\\",\\\"$1\\\",\\\"h\\\",{\\\"children\\\":[null,[[\\\"$\\\",\\\"$L8\\\",null,{\\\"children\\\":\\\"$L9\\\"}],null],[\\\"$\\\",\\\"$La\\\",null,{\\\"children\\\":\\\"$Lb\\\"}]]}],false]],\\\"m\\\":\\\"$undefined\\\",\\\"G\\\":[\\\"$c\\\",[]],\\\"s\\\":false,\\\"S\\\":false}\\n\"])</script><script>self.__next_f.push([1,\"4:[\\\"$\\\",\\\"main\\\",null,{\\\"children\\\":[[\\\"$\\\",\\\"p\\\",null,{\\\"children\\\":\\\"NEAPTIDE \u00b7 LOCAL RESEARCH FIXTURE \u00b7 NEXT.JS 15.5.22\\\"}],[\\\"$\\\",\\\"h1\\\",null,{\\\"children\\\":[\\\"Streaming metadata: \\\",\\\"asynchronous function\\\"]}],[\\\"$\\\",\\\"p\\\",null,{\\\"id\\\":\\\"shell-marker\\\",\\\"children\\\":\\\"The page content is ready. 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        "configuration": "blocking",
        "head": "<head><meta charset=\"utf-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"><link rel=\"preload\" as=\"script\" fetchpriority=\"low\" href=\"/_next/static/chunks/webpack-078f6dfb37dff419.js\"><script src=\"/_next/static/chunks/0937d497-44abb0f9355ace92.js\" async=\"\"></script><script src=\"/_next/static/chunks/89-9ed32d6006a2b0d7.js\" async=\"\"></script><script src=\"/_next/static/chunks/main-app-7f103afb963e4061.js\" async=\"\"></script><title>Asynchronous metadata control</title><meta name=\"description\" content=\"Asynchronous metadata control description.\"><meta name=\"robots\" content=\"noindex, nofollow\"><link rel=\"canonical\" href=\"https://metadata.example.test/async\"><script src=\"/_next/static/chunks/polyfills-42372ed130431b0a.js\" nomodule=\"\"></script></head>",
        "tags": [
          {
            "field": "title",
            "html": "<title>Asynchronous metadata control</title>",
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            "region": "head",
            "tag": "TITLE",
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          },
          {
            "field": "description",
            "html": "<meta name=\"description\" content=\"Asynchronous metadata control description.\">",
            "parent": "HEAD",
            "region": "head",
            "tag": "META",
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            "field": "canonical",
            "html": "<link rel=\"canonical\" href=\"https://metadata.example.test/async\">",
            "parent": "HEAD",
            "region": "head",
            "tag": "LINK",
            "value": "https://metadata.example.test/async"
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        "title": "Asynchronous metadata control",
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    "verified_at_utc": "2026-10-12T20:45:16.964734+00:00",
    "archive": "reproduction.zip",
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    "default_build": "passed",
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    "replayed_http_responses": 18,
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      "generated script/build IDs",
      "chunk boundaries",
      "timings"
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            "value": "https://metadata.example.test/static",
            "character_offset": 639
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        ],
        "complete_response_ms": 39.03
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        "id": "static_default--googlebot_ua--r1",
        "mode": "static_default",
        "profile": "googlebot_ua",
        "round": 1,
        "captured_at_utc": "2026-10-12T20:43:27.074308+00:00",
        "request": {
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          "headers": {
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            "Connection": "close"
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        "status": 200,
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          [
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        ],
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      {
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        "profile": "twitterbot_ua",
        "round": 1,
        "captured_at_utc": "2026-10-12T20:43:27.084646+00:00",
        "request": {
          "url": "http://127.0.0.1:8791/static",
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        ],
        "headers_received_ms": 3.53,
        "body_file": "evidence/http/static_default--twitterbot_ua--r1.html",
        "body_sha256": "60ceca0cda4552b212ecdf84a11680bfad0f823c91ab5978b1dd1b399e2e2ca1",
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        "id": "async_default--browser_like--r1",
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        "round": 1,
        "captured_at_utc": "2026-10-12T20:43:27.089724+00:00",
        "request": {
          "url": "http://127.0.0.1:8791/async",
          "headers": {
            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36",
            "Accept": "text/html",
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            "Connection": "close"
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        "status": 200,
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        "headers_received_ms": 3.59,
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            "character_offset": 6731
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          {
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            "character_offset": 6859
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        ],
        "complete_response_ms": 258.03
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      {
        "id": "async_default--googlebot_ua--r1",
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        "captured_at_utc": "2026-10-12T20:43:27.349220+00:00",
        "request": {
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          "headers": {
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