{
  "date": "2026-09-06",
  "version": "1.3.0-rc.4",
  "application_commit": "d7743cb",
  "server_tools_commit": "708bfc2",
  "build_time": "2026-09-06T16:35:54Z",
  "atlas_task": "73c2ee5d-ae84-4938-847b-db2e7322c73b",
  "fixes": [
    "Preserve the exact legacy mpc-qt-setup.exe without executing, replacing or claiming it for MPV ownership; unrelated executables still refuse unowned-directory mutation.",
    "Download MPC-QT into a unique temporary directory, clean after completion/failure/cancellation, and never reuse the legacy setup executable.",
    "Publish the original reviewed Windows mpv/FFmpeg archives under immutable BLAKE3-addressed paths after GitHub replaced a release asset at the same URL. Refreshed metadata changes six upstream URLs, retains their hashes and all manager artifacts, and is signed by the offline service."
  ],
  "validation": {
    "go_test_all": "passed",
    "go_test_race_all": "passed for application change; focused race rerun passed after final test adjustment",
    "make_lint": "passed, including mirror tooling change",
    "npm_test": "182 passed",
    "frontend_vendor_check": "passed",
    "six_target_build": "passed",
    "native_windows_regressions": "Ownership proof rejection and two install/remove cycles pass; staging cleanup passes success, download failure, checksum failure, commit cancellation, installer failure and missing installed executable. Installer executor is injected; this does not establish interactive MPC-QT/UAC behavior.",
    "mirror_tooling": "go test -race ./cmd/generate-info ./pkg/releaseprovenance passed; reviewed HTTPS/digest addressing, preserved hashes/source URLs/manager URLs, unused mirror and mismatched digest rejection.",
    "prior_browser_regressions": "RC3 seven cases per native OS retained in results-rc3.json; unchanged frontend behavior. RC4 actual application browser checks are recorded below."
  },
  "manifest": {
    "url": "https://mpv.rocks/api/releases/rc.json",
    "sha256": "b586c990cb7b4949eab26fbe17d3bb232adb4e6d44dc3a59a6c8d58edec5dce6",
    "channel": "rc",
    "key_id": "rc-2026-09",
    "published_at": "2026-09-06T16:41:12Z",
    "public_bytes_match_signed_output": true
  },
  "legacy": {
    "version": "1.2.0",
    "unchanged_by_rc4_publication": true,
    "unchanged_by_metadata_refresh": true,
    "sha256": "7375977cd15bde6e126bbce67fcae2f52e7b804b94c86a7cc6f4940e8f22133e"
  },
  "upstream_replacement": {
    "original_asset_id": 546513057,
    "replacement_asset_id": 547169280,
    "replacement_created_at": "2026-09-06T12:29:21Z",
    "original_sha256": "9a8dcd7e42f245854fa423357fb56633cbb61c4c1c5c10e19b55e8405ec006ee",
    "replacement_sha256": "b4aacae56fdde115a5f5d13c5c4341af1b3e89e8a06aa135444ea6fe6633328f",
    "same_download_url": true,
    "initial_qa": "correctly rejected changed bytes before commit",
    "resolution": "preserved and publicly verified original reviewed bytes; source provenance remains available beside each immutable mirror"
  },
  "artifacts": [
    {
      "file": "mpv-manager-linux-amd64",
      "url": "https://mpv.rocks/api/releases/artifacts/v1.3.0-rc.4/mpv-manager-linux-amd64",
      "size": 29499552,
      "sha256": "dbab568264c1c7fd9021f3ae65a11f51038242f3fc6f01067c3eb64450f7be4b",
      "blake3": "45844b28d7bf8a6a97961b6ca89a3e077cf423258fb858936fed5c817bde0bfa",
      "public_bytes_match_local": true
    },
    {
      "file": "mpv-manager-linux-arm64",
      "url": "https://mpv.rocks/api/releases/artifacts/v1.3.0-rc.4/mpv-manager-linux-arm64",
      "size": 28246176,
      "sha256": "0268305afc43463c3e6eb30e9ba0b941374aa5e66c4c07fa65a3732131ece92a",
      "blake3": "c0e744e808e287799475a36b53286c100cf69e546dcb42c62b4f62953b0d88d8",
      "public_bytes_match_local": true
    },
    {
      "file": "mpv-manager-win-x86_64.exe",
      "url": "https://mpv.rocks/api/releases/artifacts/v1.3.0-rc.4/mpv-manager-win-x86_64.exe",
      "size": 29761024,
      "sha256": "c71c6bae1d94e2cfa65e1400d1146f6612d6f6bcff1607a51f168b2b36401cd4",
      "blake3": "7f7cef6a1bafa8b9fe5988e2f2465fc5196845719dfa300f108f781268c98a4b",
      "public_bytes_match_local": true
    },
    {
      "file": "mpv-manager-win-arm64.exe",
      "url": "https://mpv.rocks/api/releases/artifacts/v1.3.0-rc.4/mpv-manager-win-arm64.exe",
      "size": 28258816,
      "sha256": "d9a21ad6b971e611efc7a25552c045191b5de72d4d983750ae96fb206b1cca09",
      "blake3": "d5c61cf6f4df559233d9f3771f6c1f3c989a31fc25781541cbeac7409ed4f6c8",
      "public_bytes_match_local": true
    },
    {
      "file": "mpv-manager-macos-intel",
      "url": "https://mpv.rocks/api/releases/artifacts/v1.3.0-rc.4/mpv-manager-macos-intel",
      "size": 29488448,
      "sha256": "196419d3807b99bdb0f0cf283cbda01cd492763eba39323327d6ba861f79f6e0",
      "blake3": "a015dbb501325ff2bf8869526dee6fb2fba76fc68c3994f015ad087a35a0e2bb",
      "public_bytes_match_local": true
    },
    {
      "file": "mpv-manager-macos-arm",
      "url": "https://mpv.rocks/api/releases/artifacts/v1.3.0-rc.4/mpv-manager-macos-arm",
      "size": 28409602,
      "sha256": "d9e183ff2bf3cd7802dd6457cacc071450f3f1090187165c8e5fd79676a889d2",
      "blake3": "301b566c0d3c15d6a790a32a3cfe6d4329c04afd8c35bf3ba5dc60b0872bb45c",
      "public_bytes_match_local": true
    }
  ],
  "upstream_mirrors": [
    {
      "file": "mpv-x86_64-20260906-git-876ba7b283.7z",
      "source_url": "https://github.com/zhongfly/mpv-winbuild/releases/download/2026-09-06-876ba7b283/mpv-x86_64-20260906-git-876ba7b283.7z",
      "download_url": "https://mpv.rocks/api/releases/upstream-artifacts/9c8fbe0fc7fc9a8f0021120f2f60fdc8e82810e7c500b5dd00638244bff0a361/mpv-x86_64-20260906-git-876ba7b283.7z",
      "sha256": "9a8dcd7e42f245854fa423357fb56633cbb61c4c1c5c10e19b55e8405ec006ee",
      "blake3": "9c8fbe0fc7fc9a8f0021120f2f60fdc8e82810e7c500b5dd00638244bff0a361",
      "size": 32676997,
      "public_bytes_match_reviewed": true
    },
    {
      "file": "mpv-x86_64-v3-20260906-git-876ba7b283.7z",
      "source_url": "https://github.com/zhongfly/mpv-winbuild/releases/download/2026-09-06-876ba7b283/mpv-x86_64-v3-20260906-git-876ba7b283.7z",
      "download_url": "https://mpv.rocks/api/releases/upstream-artifacts/bdd2f32a19f04435620b4f38d7ece528b17eb4b247608921d00f2aad7d3f374d/mpv-x86_64-v3-20260906-git-876ba7b283.7z",
      "sha256": "3c92280564e2ca13b2b5ca1b7fdadf7679f30f4735cad52f47c61d5c9e77ad8e",
      "blake3": "bdd2f32a19f04435620b4f38d7ece528b17eb4b247608921d00f2aad7d3f374d",
      "size": 33912471,
      "public_bytes_match_reviewed": true
    },
    {
      "file": "mpv-aarch64-20260906-git-876ba7b283.7z",
      "source_url": "https://github.com/zhongfly/mpv-winbuild/releases/download/2026-09-06-876ba7b283/mpv-aarch64-20260906-git-876ba7b283.7z",
      "download_url": "https://mpv.rocks/api/releases/upstream-artifacts/ea24a1749face652ac30ceb6aef31e1c5f9fe9d29af8f45674583460317273cd/mpv-aarch64-20260906-git-876ba7b283.7z",
      "sha256": "23c91c3332e223310eaacc537cb50101fdb8b7480cb4fae0e20fa2ecf09b5a9a",
      "blake3": "ea24a1749face652ac30ceb6aef31e1c5f9fe9d29af8f45674583460317273cd",
      "size": 27301568,
      "public_bytes_match_reviewed": true
    },
    {
      "file": "ffmpeg-x86_64-git-c6e28adab.7z",
      "source_url": "https://github.com/zhongfly/mpv-winbuild/releases/download/2026-09-06-876ba7b283/ffmpeg-x86_64-git-c6e28adab.7z",
      "download_url": "https://mpv.rocks/api/releases/upstream-artifacts/19c68b1c5f74701539015a4d8c38602cd73f204756a7b9446698b5106d7a42f4/ffmpeg-x86_64-git-c6e28adab.7z",
      "sha256": "164fbf432e42af6866e2e961855215a22e6e61487074443c7110a553a3aad116",
      "blake3": "19c68b1c5f74701539015a4d8c38602cd73f204756a7b9446698b5106d7a42f4",
      "size": 28046355,
      "public_bytes_match_reviewed": true
    },
    {
      "file": "ffmpeg-x86_64-v3-git-c6e28adab.7z",
      "source_url": "https://github.com/zhongfly/mpv-winbuild/releases/download/2026-09-06-876ba7b283/ffmpeg-x86_64-v3-git-c6e28adab.7z",
      "download_url": "https://mpv.rocks/api/releases/upstream-artifacts/fb5522838d9952f7b8495efdf24c12f195013104d02d734e94b36e6d1aa25cd0/ffmpeg-x86_64-v3-git-c6e28adab.7z",
      "sha256": "ba502df61cdc9514eaafad51aec0b69f2b475dddf1cd8d7c5f7069515e5f0dbe",
      "blake3": "fb5522838d9952f7b8495efdf24c12f195013104d02d734e94b36e6d1aa25cd0",
      "size": 29106937,
      "public_bytes_match_reviewed": true
    },
    {
      "file": "ffmpeg-aarch64-git-c6e28adab.7z",
      "source_url": "https://github.com/zhongfly/mpv-winbuild/releases/download/2026-09-06-876ba7b283/ffmpeg-aarch64-git-c6e28adab.7z",
      "download_url": "https://mpv.rocks/api/releases/upstream-artifacts/38f42a4ff83c52e044f3035cad2aa1e64326f35d0415174aaad583f46aa9b0c4/ffmpeg-aarch64-git-c6e28adab.7z",
      "sha256": "8203268f8c186b8306bf9d930e1729b01054f97a371c16aaa0896d6991f3a96e",
      "blake3": "38f42a4ff83c52e044f3035cad2aa1e64326f35d0415174aaad583f46aa9b0c4",
      "size": 23064178,
      "public_bytes_match_reviewed": true
    }
  ],
  "application_smoke": {
    "windows": {
      "identity": {
        "product": "mpv-manager",
        "component": "manager-portable",
        "version": "1.3.0-rc.4",
        "goos": "windows",
        "goarch": "amd64",
        "build_time": "2026-09-06T16:35:54Z",
        "git_commit": "d7743cb"
      },
      "manifest": {
        "status": 200,
        "data": {
          "available": true,
          "version": "1.3.0-rc.4"
        }
      },
      "installation": {
        "defaultAppSetup": {
          "registered": true,
          "settingsLaunchAccepted": true,
          "userDefaultSelection": "manual QA remains",
          "registrationRemovedAfterQA": true
        },
        "method": "mpv-binary",
        "defaultPath": true,
        "status": "complete",
        "installedIdentity": [
          "mpv v0.41.0-1035-g876ba7b28 Copyright \u00a9 2000-2026 mpv/MPlayer/mplayer2 projects\r",
          " built on Sep  6 2026 00:18:26\r",
          "libplacebo version: v7.371.0 (v7.360.0-124-g3330a51-dirty)\r",
          "FFmpeg version: N-126434-gc6e28adab\r"
        ],
        "reinstallation": {
          "uninstall": "complete",
          "reinstall": {
            "status": "complete",
            "installedIdentity": [
              "mpv v0.41.0-1035-g876ba7b28 Copyright \u00a9 2000-2026 mpv/MPlayer/mplayer2 projects\r",
              " built on Sep  6 2026 00:18:26\r",
              "libplacebo version: v7.371.0 (v7.360.0-124-g3330a51-dirty)\r",
              "FFmpeg version: N-126434-gc6e28adab\r"
            ]
          },
          "sameDefaultDirectory": true
        },
        "legacySetupPreserved": true,
        "startupEntries": [
          "..mpv-manager-config-coordination.lock",
          ".mpv-manager-installer.lock",
          "portable_config"
        ],
        "userFilesPreserved": true,
        "lockFilesPreserved": true
      },
      "routeChecks": 22,
      "unauthenticatedAPI": 401,
      "shutdown": 200,
      "exitCode": 0,
      "errors": []
    },
    "macos": {
      "identity": {
        "product": "mpv-manager",
        "component": "manager-portable",
        "version": "1.3.0-rc.4",
        "goos": "darwin",
        "goarch": "arm64",
        "build_time": "2026-09-06T16:35:54Z",
        "git_commit": "d7743cb"
      },
      "manifest": {
        "status": 200,
        "data": {
          "available": true,
          "version": "1.3.0-rc.4"
        }
      },
      "routeChecks": 22,
      "unauthenticatedAPI": 401,
      "shutdown": 200,
      "exitCode": 0,
      "errors": []
    },
    "linux": {
      "identity": {
        "product": "mpv-manager",
        "component": "manager-portable",
        "version": "1.3.0-rc.4",
        "goos": "linux",
        "goarch": "amd64",
        "build_time": "2026-09-06T16:35:54Z",
        "git_commit": "d7743cb"
      },
      "manifest": {
        "status": 200,
        "data": {
          "available": true,
          "version": "1.3.0-rc.4"
        }
      },
      "routeChecks": 22,
      "unauthenticatedAPI": 401,
      "shutdown": 200,
      "exitCode": 0,
      "errors": []
    }
  },
  "remaining": [
    "Owner manual acceptance, including actual file-type selection in Windows Settings; a successful launch is not proof of chosen defaults.",
    "Browser-download quarantine/SmartScreen/Gatekeeper and permission outcomes.",
    "Historical-client bootstrap, stable production trust/authorization, protected release-chain rehearsal and final approval.",
    "Windows arm64, macOS Intel and Linux arm64 native coverage or owner exception.",
    "Platform signing remains deferred to v1.4.0."
  ],
  "publication": "RC4 and refreshed signed metadata only; all manager binary bytes unchanged by metadata correction; earlier immutable RC artifacts retained; no Git push or final stable release."
}