{
  "fixtureId": "cs-hono-5366",
  "execution": {
    "status": "completed"
  },
  "head": {
    "effectiveConfigurationHash": "32629f9bcff216eb19f67ae86d05f7189474e9247cb97f5dc2d07a7739b3d15d",
    "lensStatuses": {
      "correctness": "issue_found",
      "security": "issue_found",
      "testing": "issue_found",
      "architecture": "issue_found",
      "compatibility": "issue_found",
      "performance": "cleared",
      "product_semantics": "issue_found"
    },
    "findings": [
      {
        "id": "head-finding-1",
        "lens": "architecture",
        "alsoReportedBy": [
          "correctness",
          "compatibility",
          "product_semantics",
          "security",
          "testing"
        ],
        "title": "Multipart files are corrupted when formData() follows text()",
        "description": "For a multipart request containing a file byte such as 0xFF, calling req.text() first decodes the entire body as UTF-8 and replaces that invalid byte with U+FFFD. The new path then rebuilds a Response from that string and the original multipart Content-Type, so req.formData() succeeds but the resulting File contains the UTF-8 bytes EF BF BD rather than the uploaded 0xFF. Calling formData() first reads the original request bytes. This violates the change's stated goal that cached-body reuse behave like parsing the same request directly, and silently changes uploaded data.\n\nFor a multipart request containing a file byte such as 0xFF, calling req.text() first decodes the entire body as UTF-8 and replaces that invalid byte. The changed conversion then builds a Response from that decoded string while attaching the original multipart Content-Type, so req.formData() now succeeds but returns a File containing the UTF-8 replacement bytes (EF BF BD) rather than the uploaded byte (FF). The new multipart test uses only ASCII data, so it does not exercise this loss. Before this change, this accessor order rejected instead of silently returning a corrupted upload; the PR's stated order-independent parsing behavior is not met.\n\nFor a multipart upload with a binary file containing an invalid UTF-8 byte such as 0xFF, calling req.text() first caches decoded text, which replaces that byte. The new conversion re-encodes this cached string into a Response, attaches the original multipart Content-Type, and lets formData() return a File whose bytes are now EF BF BD rather than FF. This newly successful public accessor sequence can make an application accept and persist a corrupted upload; previously formData() rejected because the rebuilt Response lacked a media type. The new multipart test covers only ASCII form text, not file bytes.\n\nFor a multipart request with a file part containing a non-UTF-8 byte such as 0xFF, calling req.text() first caches only a decoded string. The new Content-Type forwarding then lets req.formData() parse a Response rebuilt from that string. Text decoding replaces the invalid byte with U+FFFD and Response re-encodes it as EF BF BD, so formData() now succeeds but returns a File with different bytes from the original request; calling formData() first preserves the original file. Before this change, this conversion threw rather than silently returning altered upload data. The new multipart test uses ASCII-only fields and does not exercise this case.\n\nFor a multipart request containing a file byte that is not valid UTF-8 (for example 0xFF), a handler can first read c.req.text() to verify the incoming raw body and then call c.req.formData(), as this change explicitly enables. The first read decodes the entire multipart body as text; rebuilding a Response from that string re-encodes invalid bytes as the UTF-8 replacement character. The newly successful formData() call therefore yields a File with 0xEF 0xBF 0xBD instead of the sent 0xFF. Applications processing or saving the parsed upload receive bytes different from those in the body they verified. Previously this formData() call rejected rather than silently returning corrupted file content; direct byte-backed parsing uses an ArrayBuffer and does not require this lossy conversion.\n\nFor a multipart request with a file containing bytes such as 0xFF, calling req.text() first caches a decoded string. The new fallback passes that string to Response with the original multipart Content-Type, so Response re-encodes the replacement character as UTF-8 before formData() parses it. formData() now succeeds but the returned File contains EF BF BD rather than the original FF. Calling formData() first preserves the file bytes, so the change makes the newly supported accessor order yield corrupted upload data rather than an equivalent form. The added multipart test has only ASCII text and cannot catch this.",
        "severity": "high",
        "locations": [
          {
            "path": "src/request.ts",
            "startLine": 235,
            "endLine": 239
          },
          {
            "path": "src/request.ts",
            "startLine": 243,
            "endLine": 243
          },
          {
            "path": "src/request.ts",
            "startLine": 225,
            "endLine": 239
          },
          {
            "path": "src/request.ts",
            "startLine": 235,
            "endLine": 239
          },
          {
            "path": "src/request.test.ts",
            "startLine": 400,
            "endLine": 415
          }
        ]
      }
    ],
    "tasks": [],
    "routing": [],
    "policy": {
      "satisfied": true,
      "blockers": []
    },
    "investigations": [
      {
        "lensKey": "correctness",
        "required": true,
        "agentStatus": "completed",
        "reportedStatus": "issue_found",
        "coverageLevel": "moderate",
        "coverageGapCount": 2,
        "toolCalls": 29,
        "coverageGaps": [
          "No executable runtime verification was available for the head commit; the byte-loss scenario follows from UTF-8 text decoding and string re-encoding.",
          "The Fetch Response/Request implementation is external to this repository."
        ],
        "requiredEvidence": [
          {
            "item": "changed_code_paths",
            "status": "gathered"
          },
          {
            "item": "callers_of_changed_code",
            "status": "gathered"
          }
        ]
      },
      {
        "lensKey": "security",
        "required": true,
        "agentStatus": "completed",
        "reportedStatus": "issue_found",
        "coverageLevel": "moderate",
        "coverageGapCount": 1,
        "toolCalls": 36,
        "coverageGaps": [
          "No runtime execution tool or verification result was available for an invalid-UTF-8 multipart fixture; byte transformation follows the Request.text()/Response(string) path."
        ],
        "requiredEvidence": [
          {
            "item": "entry_points",
            "status": "gathered"
          },
          {
            "item": "authorization_checks",
            "status": "not_applicable"
          }
        ]
      },
      {
        "lensKey": "testing",
        "required": true,
        "agentStatus": "completed",
        "reportedStatus": "issue_found",
        "coverageLevel": "moderate",
        "coverageGapCount": 2,
        "toolCalls": 32,
        "coverageGaps": [
          "No runtime test execution was available for this head commit; CI reported no checks.",
          "Runtime-specific Response.formData behavior across all supported runtimes was not verified."
        ],
        "requiredEvidence": [
          {
            "item": "related_tests",
            "status": "gathered"
          }
        ]
      },
      {
        "lensKey": "architecture",
        "required": false,
        "agentStatus": "completed",
        "reportedStatus": "issue_found",
        "coverageLevel": "strong",
        "coverageGapCount": 1,
        "toolCalls": 37,
        "coverageGaps": [
          "No runtime execution results or CI checks were available for this commit; the byte-corruption scenario follows from the visible text decoding and Response reconstruction path."
        ],
        "requiredEvidence": []
      },
      {
        "lensKey": "compatibility",
        "required": true,
        "agentStatus": "completed",
        "reportedStatus": "issue_found",
        "coverageLevel": "moderate",
        "coverageGapCount": 1,
        "toolCalls": 37,
        "coverageGaps": [
          "No runtime verification was supplied for this commit and no CI checks were reported; supported Fetch engines were not executed in this tool environment."
        ],
        "requiredEvidence": []
      },
      {
        "lensKey": "performance",
        "required": false,
        "agentStatus": "completed",
        "reportedStatus": "cleared",
        "coverageLevel": "strong",
        "coverageGapCount": 1,
        "toolCalls": 22,
        "coverageGaps": [
          "No runtime benchmarks were provided for the head commit; repository benchmark searches found no request-body conversion workload."
        ],
        "requiredEvidence": []
      },
      {
        "lensKey": "product_semantics",
        "required": true,
        "agentStatus": "completed",
        "reportedStatus": "issue_found",
        "coverageLevel": "moderate",
        "coverageGapCount": 2,
        "toolCalls": 25,
        "coverageGaps": [
          "The body of #5365 was not available through get_linked_issues, which reported no linked issues.",
          "No runtime verification for this commit was supplied; the binary-byte scenario was established from the owned conversion path and standard Request/Response text encoding behavior."
        ],
        "requiredEvidence": []
      }
    ],
    "arbitrationDiagnostics": {
      "draftedTasks": 0,
      "retainedTasks": 0,
      "mergeRejectionCodes": []
    }
  },
  "sufficiency": [],
  "durationMs": 170145,
  "costMicros": 0,
  "usage": {
    "inputTokens": 1144046,
    "outputTokens": 15655,
    "cacheReadTokens": 865792,
    "cacheWriteTokens": 0,
    "modelCalls": 228,
    "toolCalls": 218
  },
  "notes": []
}