musicbrainz-mcp-server

Added value: +{
+  "description": "Artist MBID for release-only browse: releases crediting the artist on tracks but not at release level.",
+  "pattern": "^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$",
+  "type": "string"
+}

Added value: +{
+  "description": "Pipe-separated statuses for release by artist/label/recording/release-group/track_artist: official, promotion, bootleg, pseudo-release, withdrawn, cancelled. Tokens are trimmed/lowercased and unioned; blank means absent.",
+  "type": "string"
+}

Added value: +{
+  "description": "Pipe-separated release types: album, single, ep, broadcast, other, audio drama, audiobook, compilation, demo, dj-mix, field recording, interview, live, mixtape/street, remix, soundtrack, spokenword. Supported for release-group by artist and release by artist/label/recording/track_artist. Primary types union; primary and secondary categories intersect; release-group by artist requires all secondary types. Tokens are trimmed/lowercased; blank means absent.",
+  "type": "string"
+}

Added value: +{
+  "description": "Recording first-release date, possibly partial. Omitted when absent.",
+  "type": "string"
+}

Added value: +{
+  "description": "Release-group secondary classifications in upstream order. Omitted when empty; absence does not establish a studio album.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_link`: A parent key is unknown, aliases collide, not exactly one nonempty parent is supplied, or the MBID/parent combination is invalid. `entity_not_found`: The link MBID is well-formed but no such parent entity exists (HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_filter`: A nonempty type/status filter has an unknown token, an empty pipe-list member, or is unsupported for the target and parent. `invalid_link`: A parent key is unknown, aliases collide, not exactly one nonempty parent is supplied, or the MBID/parent combination is invalid. `entity_not_found`: The link MBID is well-formed but no such parent entity exists (HTTP 404). Other values are possible when a failure originates below the handler."

Previous value: -[
-  "invalid_link",
-  "entity_not_found"
-]New value: +[
+  "invalid_filter",
+  "invalid_link",
+  "entity_not_found"
+]

Previous value: -"The parent link type used (artist, label, release-group, release, recording, work, or area)."New value: +"The parent link type used (artist, track_artist, label, release-group, release, recording, work, or area)."

Added value: +{
+  "description": "Canonical applied pipe-separated status filter; preserve on continuation.",
+  "type": "string"
+}

Added value: +{
+  "description": "Canonical applied pipe-separated type filter; preserve on continuation.",
+  "type": "string"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "name",
-      "aliases",
-      "tags",
-      "releaseGroups",
-      "relationships",
-      "externalLinks"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "name",
+      "ipis",
+      "isnis",
+      "aliases",
+      "tags",
+      "releaseGroups",
+      "relationships",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Area MBID for musicbrainz_browse_entities link.area. Omitted when unknown.",
+  "type": "string"
+}

Added value: +{
+  "additionalProperties": false,
+  "description": "Birth or formation area. Omitted when unknown.",
+  "properties": {
+    "mbid": {
+      "description": "Area MBID. Omitted when unknown.",
+      "type": "string"
+    },
+    "name": {
+      "description": "Area name. Omitted when unknown.",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

Added value: +{
+  "additionalProperties": false,
+  "description": "Death or dissolution area. Omitted when unknown.",
+  "properties": {
+    "mbid": {
+      "description": "Area MBID. Omitted when unknown.",
+      "type": "string"
+    },
+    "name": {
+      "description": "Area name. Omitted when unknown.",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

Added value: +{
+  "description": "IPI identifiers as exact strings in upstream order (may be empty).",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "ISNI identifiers as exact strings in upstream order (may be empty).",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "name",
-      "aliases",
-      "tags",
-      "externalLinks"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "name",
+      "ipis",
+      "isnis",
+      "aliases",
+      "tags",
+      "externalLinks",
+      "relationships"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Area MBID for musicbrainz_browse_entities link.area. Omitted when unknown.",
+  "type": "string"
+}

Added value: +{
+  "description": "IPI identifiers as exact strings in upstream order (may be empty).",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "ISNI identifiers as exact strings in upstream order (may be empty).",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "Label ownership, imprint and distribution relationships in upstream order, uncapped (may be empty).",
+  "items": {
+    "additionalProperties": false,
+    "description": "A typed relationship to another entity (band membership, performer, writer, etc.).",
+    "properties": {
+      "attributes": {
+        "description": "Role modifiers (e.g. \"lead vocals\", \"assistant\", \"co\"). Omitted when none.",
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "begin": {
+        "description": "Relationship start date. Omitted when absent.",
+        "type": "string"
+      },
+      "direction": {
+        "description": "Relationship direction (\"forward\" | \"backward\"). Omitted when absent.",
+        "type": "string"
+      },
+      "end": {
+        "description": "Relationship end date. Omitted when absent.",
+        "type": "string"
+      },
+      "orderingKey": {
+        "description": "Upstream relationship sequence key, including zero. Omitted when unknown; array order is preserved.",
+        "type": "number"
+      },
+      "targetDisambiguation": {
+        "description": "Qualifier distinguishing the related entity from namesakes. Omitted when absent.",
+        "type": "string"
+      },
+      "targetId": {
+        "description": "MBID of the related entity — chain to the matching get_* tool. Omitted for url targets.",
+        "type": "string"
+      },
+      "targetName": {
+        "description": "Name/title of the related entity. Omitted when absent.",
+        "type": "string"
+      },
+      "targetType": {
+        "description": "Type of the related entity (\"artist\" | \"work\" | \"recording\" | \"label\" | \"url\").",
+        "type": "string"
+      },
+      "type": {
+        "description": "Relationship role (e.g. \"member of band\", \"producer\", \"writer\", \"performance\").",
+        "type": "string"
+      }
+    },
+    "required": [
+      "type",
+      "targetType"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Previous value: -"Include performance/production relationships (performers, producers, engineers) and work-rels."New value: +"Include performance/production, work and recording relationships (samples, mashups, music videos, DJ mixes), and external links."

Previous value: -"Performance/production relationships and work-rels (may be empty)."New value: +"Performance/production, work and recording relationships in upstream order, uncapped (may be empty)."

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "title",
-      "artistCredit",
-      "artistCreditString",
-      "labelInfo",
-      "mediaOffset",
-      "mediaTotal",
-      "trackTotal",
-      "media",
-      "coverArt"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "labelInfo",
+      "externalLinks",
+      "mediaOffset",
+      "mediaTotal",
+      "trackTotal",
+      "media",
+      "coverArt"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "External links for this edition, such as Discogs release pages (may be empty).",
+  "items": {
+    "additionalProperties": false,
+    "description": "An external resource link (url-rel). Where cross-service IDs like Wikidata QID are surfaced.",
+    "properties": {
+      "resource": {
+        "description": "The external URL. Wikidata/Discogs IDs live in the URL path — chain to those servers.",
+        "type": "string"
+      },
+      "type": {
+        "description": "Link type (e.g. \"wikidata\", \"discogs\", \"official homepage\", \"streaming\").",
+        "type": "string"
+      }
+    },
+    "required": [
+      "type",
+      "resource"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "Track-specific artist credit. Omitted when not supplied; may be empty.",
+  "items": {
+    "additionalProperties": false,
+    "description": "One credited artist within an artist credit.",
+    "properties": {
+      "artistId": {
+        "description": "MBID of the credited artist — chain to musicbrainz_get_artist.",
+        "type": "string"
+      },
+      "artistName": {
+        "description": "Canonical artist name.",
+        "type": "string"
+      },
+      "joinPhrase": {
+        "description": "Text that joins this credit to the next (e.g. \" feat. \", \" & \"). Omitted when empty.",
+        "type": "string"
+      },
+      "name": {
+        "description": "Credited name as it appears on the release (may be an alias).",
+        "type": "string"
+      }
+    },
+    "required": [
+      "name",
+      "artistId",
+      "artistName"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "Track-specific display credit with verbatim join phrases. Omitted without credited artists.",
+  "type": "string"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "title",
-      "artistCredit",
-      "artistCreditString",
-      "releases",
-      "tags"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "releases",
+      "tags",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "External album links, such as Wikidata and Discogs master pages (may be empty).",
+  "items": {
+    "additionalProperties": false,
+    "description": "An external resource link (url-rel). Where cross-service IDs like Wikidata QID are surfaced.",
+    "properties": {
+      "resource": {
+        "description": "The external URL. Wikidata/Discogs IDs live in the URL path — chain to those servers.",
+        "type": "string"
+      },
+      "type": {
+        "description": "Link type (e.g. \"wikidata\", \"discogs\", \"official homepage\", \"streaming\").",
+        "type": "string"
+      }
+    },
+    "required": [
+      "type",
+      "resource"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "title",
-      "languages",
-      "iswcs",
-      "aliases",
-      "tags",
-      "relationships",
-      "externalLinks"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "languages",
+      "iswcs",
+      "attributes",
+      "aliases",
+      "tags",
+      "relationships",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Work attributes in upstream order, including repeated types (may be empty).",
+  "items": {
+    "additionalProperties": false,
+    "description": "One work attribute; known members of sparse rows are preserved.",
+    "properties": {
+      "type": {
+        "description": "Attribute type, such as a rights society or musical key. Omitted when unknown.",
+        "type": "string"
+      },
+      "value": {
+        "description": "Exact attribute value, preserving spaces and leading zeros. Omitted when unknown.",
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "type": "array"
+}

Previous value: -"Result offset for pagination (0-based)."New value: +"Result offset for pagination (0-based, below 500). A page crossing the 500-match ceiling is reduced to the remaining window."

Previous value: -"Machine-readable failure mode. Declared by this tool: `blank_query`: The query contains only whitespace (it is blank after trimming). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `search_window_exceeded`: The offset is at or beyond the 500-match search window. `blank_query`: The query contains only whitespace (it is blank after trimming). Other values are possible when a failure originates below the handler."

Previous value: -[
-  "blank_query"
-]New value: +[
+  "search_window_exceeded",
+  "blank_query"
+]

Added value: +{
+  "description": "Recording first-release date, possibly partial. Omitted when absent.",
+  "type": "string"
+}

Added value: +{
+  "description": "Release-group secondary classifications, in upstream order. Omitted when empty; absence does not establish a studio album.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -"Page size (1–100)."New value: +"Positive integer page size (default 25); values above 100 are clamped to 100 with a notice. With MUSICBRAINZ_CLAMP_OVERSIZED_LIMITS=off, maximum 100 is enforced."

Previous value: -100New value: +9007199254740991

Previous value: -"Parent area MBID (artists/labels in this area)."New value: +"Parent area MBID (artists, labels, or releases in this area)."

Previous value: -"Parent recording MBID (releases containing this recording)."New value: +"Parent recording MBID (artists or releases linked to this recording)."

Previous value: -"Parent release MBID (recording entities in this edition, not ordered tracks)."New value: +"Parent release MBID (artists, labels, release-groups, or recording entities in this edition; recordings are not ordered tracks)."

Previous value: -"Parent work MBID (recordings of this work)."New value: +"Parent work MBID (artists or recordings linked to this work)."

Added value: +{
+  "description": "Upstream relationship sequence key, including zero. Omitted when unknown; array order is preserved.",
+  "type": "number"
+}

Added value: +{
+  "description": "Qualifier distinguishing the related entity from namesakes. Omitted when absent.",
+  "type": "string"
+}

Added value: +{
+  "default": 25,
+  "description": "Maximum images returned (default 25; values above 100 clamp to 100 with a notice).",
+  "maximum": 9007199254740991,
+  "minimum": 1,
+  "type": "integer"
+}

Added value: +{
+  "default": 0,
+  "description": "Zero-based image offset in archive order (default 0).",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "entityType",
-      "images",
-      "hasArt"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "entityType",
+      "offset",
+      "images",
+      "hasArt",
+      "totalCount"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Applied image limit when more remain.",
+  "type": "number"
+}

Previous value: -"Cover-art images (empty when the entity has no art)."New value: +"Selected cover-art images in archive order (empty for no art or an exhausted page)."

Previous value: -"Present when the entity has no art: states that no images exist, or — when the MBID could not be checked against MusicBrainz — that its existence is unconfirmed."New value: +"Combined limit clamp, continuation, exhausted page, or no-art/existence-unconfirmed guidance."

Added value: +{
+  "description": "Effective zero-based image offset in archive order.",
+  "type": "number"
+}

Added value: +{
+  "description": "Images returned when more remain.",
+  "type": "number"
+}

Added value: +{
+  "description": "Exact image total before the limit and offset window.",
+  "type": "number"
+}

Added value: +{
+  "description": "True when images remain after this nonempty page.",
+  "type": "boolean"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "title",
-      "artistCredit",
-      "artistCreditString",
-      "isrcs",
-      "releases",
-      "relationships",
-      "externalLinks"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "isrcs",
+      "releases",
+      "releaseAppearanceSummary",
+      "relationships",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Upstream relationship sequence key, including zero. Omitted when unknown; array order is preserved.",
+  "type": "number"
+}

Added value: +{
+  "description": "Qualifier distinguishing the related entity from namesakes. Omitted when absent.",
+  "type": "string"
+}

Added value: +{
+  "additionalProperties": false,
+  "description": "Completeness evidence derived only from this recording lookup.",
+  "properties": {
+    "cap": {
+      "description": "Upstream embedded page size (25).",
+      "type": "number"
+    },
+    "completeness": {
+      "description": "Complete for a short present page or exact total; unknown without proof; truncated only when the exact total exceeds shown.",
+      "enum": [
+        "complete",
+        "unknown",
+        "truncated"
+      ],
+      "type": "string"
+    },
+    "notice": {
+      "description": "Browse guidance starting at offset 0, independent of embedded order.",
+      "type": "string"
+    },
+    "shown": {
+      "description": "Release appearances returned in the embedded page.",
+      "type": "number"
+    },
+    "totalCount": {
+      "description": "Exact release total from upstream or a short present page. Omitted when unknown.",
+      "type": "number"
+    }
+  },
+  "required": [
+    "shown",
+    "cap",
+    "completeness",
+    "notice"
+  ],
+  "type": "object"
+}

Previous value: -"Releases this recording appears on (may be empty)."New value: +"One upstream page of release appearances (up to 25; may be empty). See releaseAppearanceSummary for completeness."

Added value: +{
+  "default": 20,
+  "description": "Maximum whole media returned (default 20; no upper bound).",
+  "maximum": 9007199254740991,
+  "minimum": 1,
+  "type": "integer"
+}

Added value: +{
+  "default": 0,
+  "description": "Zero-based medium offset in release order (default 0).",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "title",
-      "artistCredit",
-      "artistCreditString",
-      "labelInfo",
-      "media",
-      "coverArt"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "labelInfo",
+      "mediaOffset",
+      "mediaTotal",
+      "trackTotal",
+      "media",
+      "coverArt"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Requested media limit when more remain.",
+  "type": "number"
+}

Previous value: -"Media (discs) with their tracklists (may be empty)."New value: +"Selected media in release order, with complete tracklists for each medium (may be empty)."

Added value: +{
+  "description": "Effective zero-based medium offset.",
+  "type": "number"
+}

Added value: +{
+  "description": "Exact number of media in the whole normalized release.",
+  "type": "number"
+}

Added value: +{
+  "description": "Next media_offset, exhaustion, or no-media guidance.",
+  "type": "string"
+}

Added value: +{
+  "description": "Number of media returned when more remain.",
+  "type": "number"
+}

Added value: +{
+  "description": "Exact number of track occurrences in the whole normalized release, independent of upstream trackCount.",
+  "type": "number"
+}

Added value: +{
+  "description": "True when media remain after this nonempty page.",
+  "type": "boolean"
+}

Previous value: -"Include writer/composer relationships, recording relationships, and external links."New value: +"Include writer/composer, movement/arrangement and recording relationships, and external links."

Added value: +{
+  "description": "Upstream relationship sequence key, including zero. Omitted when unknown; array order is preserved.",
+  "type": "number"
+}

Added value: +{
+  "description": "Qualifier distinguishing the related entity from namesakes. Omitted when absent.",
+  "type": "string"
+}

Previous value: -"The identifier value. ISRC e.g. \"USRC17607839\"; ISWC e.g. \"T-010.140.236-1\"; barcode = the UPC/EAN digits, e.g. \"075678164125\" (spaces and hyphens are ignored; any other character, including a wildcard, is rejected)."New value: +"ISRC: compact CCXXXYYNNNNN or grouped CC-XXX-YY-NNNNN (e.g. GBAYE9701274 or GB-AYE-97-01274), case-insensitive with surrounding whitespace. ISWC: T plus ten digits, optional hyphen after T, optional dots between three-digit groups, optional hyphen/dot before the check digit (e.g. T-010.140.236-1 or T0101402361); whitespace and case are ignored. Echoes canonical uppercase ISRC or T-DDD.DDD.DDD-C ISWC. Barcode: UPC/EAN digits, e.g. 075678164125; spaces and hyphens are ignored, other characters rejected."

Added value: +[
+  "GBAYE9701274",
+  "GB-AYE-97-01274",
+  "T-010.140.236-1",
+  "T0101402361",
+  "075678164125"
+]

Previous value: -"Machine-readable failure mode. Declared by this tool: `identifier_not_found`: The identifier is well-formed but resolves to zero entities. `invalid_identifier`: The ISRC/ISWC is malformed (the dedicated endpoint returns HTTP 400), or the barcode contains anything other than digits once spaces and hyphens are removed. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `identifier_not_found`: The identifier is well-formed but resolves to zero entities. `invalid_identifier`: The ISRC/ISWC fails its accepted grammar locally or the dedicated endpoint rejects it with HTTP 400, or the barcode contains anything other than digits once spaces and hyphens are removed. Other values are possible when a failure originates below the handler."

Previous value: -"Maximum results to return (1–100)."New value: +"Positive integer page size (default 25); values above 100 are clamped to 100 with a notice. With MUSICBRAINZ_CLAMP_OVERSIZED_LIMITS=off, maximum 100 is enforced."

Previous value: -100New value: +9007199254740991

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "entityType",
-      "results",
-      "effectiveQuery",
-      "totalCount"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "entityType",
+      "offset",
+      "results",
+      "effectiveQuery",
+      "totalCount"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Previous value: -"Guidance when zero results matched — how to broaden or correct the query."New value: +"Limit clamp and pagination guidance, including zero matches, exhausted pages, and empty-page discrepancies."

Added value: +{
+  "description": "The effective zero-based result offset used for this page.",
+  "type": "number"
+}

Added value: +{}

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Added value: +{
+  "description": "Parent release MBID (recording entities in this edition, not ordered tracks).",
+  "pattern": "^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$",
+  "type": "string"
+}

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Added value: +{
+  "description": "Alias for release-group; use only one spelling.",
+  "pattern": "^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$",
+  "type": "string"
+}

Added value: +{
+  "description": "Alias for release-group; use only one spelling.",
+  "pattern": "^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$",
+  "type": "string"
+}

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Added value: +{
+  "description": "Release status (e.g. Official or Bootleg). Omitted for other entity types or when absent.",
+  "type": "string"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_link`: No link MBID was provided, more than one was provided, or the link MBID is malformed (HTTP 400). `entity_not_found`: The link MBID is well-formed but no such parent entity exists (HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_link`: A parent key is unknown, aliases collide, not exactly one nonempty parent is supplied, or the MBID/parent combination is invalid. `entity_not_found`: The link MBID is well-formed but no such parent entity exists (HTTP 404). Other values are possible when a failure originates below the handler."

Previous value: -"The parent link type used (artist, label, release-group, recording, work, or area)."New value: +"The parent link type used (artist, label, release-group, release, recording, work, or area)."

Previous value: -"Artist MBID (36-character UUID)."New value: +"Artist MBID (hyphenated hexadecimal UUID; surrounding whitespace and uppercase accepted)."

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no artist exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (rejected before fetch), or MusicBrainz rejects it with HTTP 400. `entity_not_found`: The MBID is well-formed but no artist exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."

Previous value: -"Release or release-group MBID (36-character UUID)."New value: +"Release or release-group MBID (hyphenated hexadecimal UUID; surrounding whitespace and uppercase accepted)."

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel — a value MusicBrainz rejects outright (HTTP 400). `entity_not_found`: The MBID is well-formed but no entity of the given entity_type exists with it (the archive returns 404 and the MusicBrainz check of the MBID returns 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (rejected before fetch), or an upstream rejects it with HTTP 400. `entity_not_found`: The MBID is well-formed but no entity of the given entity_type exists with it (the archive returns 404 and the MusicBrainz check of the MBID returns 404). Other values are possible when a failure originates below the handler."

Previous value: -"Label MBID (36-character UUID)."New value: +"Label MBID (hyphenated hexadecimal UUID; surrounding whitespace and uppercase accepted)."

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no label exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (rejected before fetch), or MusicBrainz rejects it with HTTP 400. `entity_not_found`: The MBID is well-formed but no label exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."

Previous value: -"Recording MBID (36-character UUID)."New value: +"Recording MBID (hyphenated hexadecimal UUID; surrounding whitespace and uppercase accepted)."

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no recording exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (rejected before fetch), or MusicBrainz rejects it with HTTP 400. `entity_not_found`: The MBID is well-formed but no recording exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."

Previous value: -"Release MBID (36-character UUID)."New value: +"Release MBID (hyphenated hexadecimal UUID; surrounding whitespace and uppercase accepted)."

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no release exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (rejected before fetch), or MusicBrainz rejects it with HTTP 400. `entity_not_found`: The MBID is well-formed but no release exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."

Previous value: -"Release-group MBID (36-character UUID)."New value: +"Release-group MBID (hyphenated hexadecimal UUID; surrounding whitespace and uppercase accepted)."

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no release-group exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (rejected before fetch), or MusicBrainz rejects it with HTTP 400. `entity_not_found`: The MBID is well-formed but no release-group exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."

Previous value: -"Work MBID (36-character UUID)."New value: +"Work MBID (hyphenated hexadecimal UUID; surrounding whitespace and uppercase accepted)."

Added value: +"^\\s*[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}\\s*$"

Added value: +{
+  "description": "Server-side recording relationship cap, when truncated.",
+  "type": "number"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no work exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (rejected before fetch), or MusicBrainz rejects it with HTTP 400. `entity_not_found`: The MBID is well-formed but no work exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler."

Added value: +{
+  "description": "Recording enumeration and relationship-detail retrieval guidance when truncated.",
+  "type": "string"
+}

Previous value: -"Writer/composer/lyricist relationships and recording-rels — the complete set (may be empty)."New value: +"All non-recording relationships and the first 25 recording relationships in upstream order (may be empty)."

Added value: +{
+  "description": "Number of recording relationships returned when truncated.",
+  "type": "number"
+}

Added value: +{
+  "description": "Exact number of recording relationships before the server-side slice. Absent when relationships are disabled.",
+  "type": "number"
+}

Added value: +{
+  "description": "True only when recording relationships were omitted beyond 25.",
+  "type": "boolean"
+}

Added value: +{
+  "description": "Release status (e.g. Official or Bootleg). Omitted for other entity types or when absent.",
+  "type": "string"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (the upstream returns HTTP 400). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel — a value MusicBrainz rejects outright (HTTP 400). `entity_not_found`: The MBID is well-formed but no entity of the given entity_type exists with it (the archive returns 404 and the MusicBrainz check of the MBID returns 404). Other values are possible when a failure originates below the handler."

Previous value: -[
-  "invalid_mbid"
-]New value: +[
+  "invalid_mbid",
+  "entity_not_found"
+]

Previous value: -"Notice when no art exists for the entity."New value: +"Present when the entity has no art: states that no images exist, or — when the MBID could not be checked against MusicBrainz — that its existence is unconfirmed."

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "mbid",
-      "title",
-      "artistCredit",
-      "artistCreditString",
-      "releases",
-      "tags",
-      "coverArt"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "releases",
+      "tags"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Previous value: -"Whether cover art exists (availability stub from WS/2)."New value: +"Cover-art availability from the Cover Art Archive: the images of the release-group's representative release, the same art musicbrainz_get_cover_art returns (exists: false with count 0 when the archive has none). Omitted when the archive lookup could not complete — the notice says so."

Previous value: -"How to fetch the complete list of editions when truncated."New value: +"Present when the releases list was capped (how to fetch the complete set of editions) and/or when cover-art availability could not be checked (why coverArt is omitted)."

Previous value: -"The identifier value. ISRC e.g. \"USRC17607839\"; ISWC e.g. \"T-010.140.236-1\"; barcode e.g. \"075678164125\"."New value: +"The identifier value. ISRC e.g. \"USRC17607839\"; ISWC e.g. \"T-010.140.236-1\"; barcode = the UPC/EAN digits, e.g. \"075678164125\" (spaces and hyphens are ignored; any other character, including a wildcard, is rejected)."

Previous value: -"Machine-readable failure mode. Declared by this tool: `identifier_not_found`: The identifier is well-formed but resolves to zero entities. `invalid_identifier`: The ISRC/ISWC is malformed (the dedicated endpoint returns HTTP 400). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `identifier_not_found`: The identifier is well-formed but resolves to zero entities. `invalid_identifier`: The ISRC/ISWC is malformed (the dedicated endpoint returns HTTP 400), or the barcode contains anything other than digits once spaces and hyphens are removed. Other values are possible when a failure originates below the handler."

Previous value: -[
-  {
-    "additionalProperties": false,
-    "description": "ISRC result arm: recordings carrying the ISRC.",
-    "properties": {
-      "identifier": {
-        "description": "The looked-up identifier value.",
-        "type": "string"
-      },
-      "kind": {
-        "const": "recordings",
-        "description": "ISRC resolved to recordings.",
-        "type": "string"
-      },
-      "recordings": {
-        "description": "Recordings carrying this ISRC.",
-        "items": {
-          "additionalProperties": false,
-          "description": "A recording carrying the looked-up ISRC.",
-          "properties": {
-            "artistCredit": {
-              "description": "Credited artist string; falls back to \"Unknown artist\" when none is recorded.",
-              "type": "string"
-            },
-            "length": {
-              "description": "Recording length as m:ss. Omitted when unknown.",
-              "type": "string"
-            },
-            "mbid": {
-              "description": "Recording MBID — chain to musicbrainz_get_recording.",
-              "type": "string"
-            },
-            "title": {
-              "description": "Recording title.",
-              "type": "string"
-            }
-          },
-          "required": [
-            "mbid",
-            "title",
-            "artistCredit"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "kind",
-      "identifier",
-      "recordings"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "ISWC result arm: works carrying the ISWC.",
-    "properties": {
-      "identifier": {
-        "description": "The looked-up identifier value.",
-        "type": "string"
-      },
-      "kind": {
-        "const": "works",
-        "description": "ISWC resolved to works.",
-        "type": "string"
-      },
-      "works": {
-        "description": "Works carrying this ISWC.",
-        "items": {
-          "additionalProperties": false,
-          "description": "A work carrying the looked-up ISWC.",
-          "properties": {
-            "mbid": {
-              "description": "Work MBID — chain to musicbrainz_get_work.",
-              "type": "string"
-            },
-            "title": {
-              "description": "Work title.",
-              "type": "string"
-            },
-            "type": {
-              "description": "Work type. Omitted when absent.",
-              "type": "string"
-            }
-          },
-          "required": [
-            "mbid",
-            "title"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "kind",
-      "identifier",
-      "works"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Barcode result arm: releases carrying the barcode.",
-    "properties": {
-      "identifier": {
-        "description": "The looked-up identifier value.",
-        "type": "string"
-      },
-      "kind": {
-        "const": "releases",
-        "description": "Barcode resolved to releases.",
-        "type": "string"
-      },
-      "releases": {
-        "description": "Releases carrying this barcode (ranked).",
-        "items": {
-          "additionalProperties": false,
-          "description": "A release carrying the looked-up barcode.",
-          "properties": {
-            "artistCredit": {
-              "description": "Credited artist string.",
-              "type": "string"
-            },
-            "country": {
-              "description": "Release country code. Omitted when absent.",
-              "type": "string"
-            },
-            "date": {
-              "description": "Release date. Omitted when absent.",
-              "type": "string"
-            },
-            "mbid": {
-              "description": "Release MBID — chain to musicbrainz_get_release.",
-              "type": "string"
-            },
-            "score": {
-              "description": "Lucene relevance score, 0–100 (barcode is a search filter; exact = 100).",
-              "type": "number"
-            },
-            "title": {
-              "description": "Release title.",
-              "type": "string"
-            }
-          },
-          "required": [
-            "mbid",
-            "title",
-            "artistCredit",
-            "score"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "kind",
-      "identifier",
-      "releases"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "description": "ISRC result arm: recordings carrying the ISRC.",
+    "properties": {
+      "identifier": {
+        "description": "The looked-up identifier value.",
+        "type": "string"
+      },
+      "kind": {
+        "const": "recordings",
+        "description": "ISRC resolved to recordings.",
+        "type": "string"
+      },
+      "recordings": {
+        "description": "Recordings carrying this ISRC.",
+        "items": {
+          "additionalProperties": false,
+          "description": "A recording carrying the looked-up ISRC.",
+          "properties": {
+            "artistCredit": {
+              "description": "Credited artist string; falls back to \"Unknown artist\" when none is recorded.",
+              "type": "string"
+            },
+            "length": {
+              "description": "Recording length as m:ss. Omitted when unknown.",
+              "type": "string"
+            },
+            "mbid": {
+              "description": "Recording MBID — chain to musicbrainz_get_recording.",
+              "type": "string"
+            },
+            "title": {
+              "description": "Recording title.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "mbid",
+            "title",
+            "artistCredit"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      }
+    },
+    "required": [
+      "kind",
+      "identifier",
+      "recordings"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "ISWC result arm: works carrying the ISWC.",
+    "properties": {
+      "identifier": {
+        "description": "The looked-up identifier value.",
+        "type": "string"
+      },
+      "kind": {
+        "const": "works",
+        "description": "ISWC resolved to works.",
+        "type": "string"
+      },
+      "works": {
+        "description": "Works carrying this ISWC.",
+        "items": {
+          "additionalProperties": false,
+          "description": "A work carrying the looked-up ISWC.",
+          "properties": {
+            "mbid": {
+              "description": "Work MBID — chain to musicbrainz_get_work.",
+              "type": "string"
+            },
+            "title": {
+              "description": "Work title.",
+              "type": "string"
+            },
+            "type": {
+              "description": "Work type. Omitted when absent.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "mbid",
+            "title"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      }
+    },
+    "required": [
+      "kind",
+      "identifier",
+      "works"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Barcode result arm: releases carrying the barcode.",
+    "properties": {
+      "identifier": {
+        "description": "The barcode digits that were searched (spaces and hyphens removed).",
+        "type": "string"
+      },
+      "kind": {
+        "const": "releases",
+        "description": "Barcode resolved to releases.",
+        "type": "string"
+      },
+      "releases": {
+        "description": "Releases carrying this barcode (ranked).",
+        "items": {
+          "additionalProperties": false,
+          "description": "A release carrying the looked-up barcode.",
+          "properties": {
+            "artistCredit": {
+              "description": "Credited artist string.",
+              "type": "string"
+            },
+            "country": {
+              "description": "Release country code. Omitted when absent.",
+              "type": "string"
+            },
+            "date": {
+              "description": "Release date. Omitted when absent.",
+              "type": "string"
+            },
+            "mbid": {
+              "description": "Release MBID — chain to musicbrainz_get_release.",
+              "type": "string"
+            },
+            "score": {
+              "description": "Lucene relevance score, 0–100 (barcode is a search filter; exact = 100).",
+              "type": "number"
+            },
+            "title": {
+              "description": "Release title.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "mbid",
+            "title",
+            "artistCredit",
+            "score"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      }
+    },
+    "required": [
+      "kind",
+      "identifier",
+      "releases"
+    ],
+    "type": "object"
+  }
+]

Previous value: -"Lucene query string. Plain text matches names/titles; field scoping (e.g. `artist:`, `country:`, `tag:`) is supported."New value: +"Lucene query string; must contain non-whitespace text. Plain text matches names/titles; field scoping (e.g. `artist:`, `country:`, `tag:`) is supported. Sent to MusicBrainz exactly as given."

Previous value: -"Machine-readable failure mode."New value: +"Machine-readable failure mode. Declared by this tool: `blank_query`: The query contains only whitespace (it is blank after trimming). Other values are possible when a failure originates below the handler."

Added value: +[
+  "blank_query"
+]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "targetType",
+      "linkType",
+      "linkMbid",
+      "entities",
+      "offset",
+      "totalCount"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_link`: No link MBID was provided, more than one was provided, or the link MBID is malformed (HTTP 400). `entity_not_found`: The link MBID is well-formed but no such parent entity exists (HTTP 404). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_link",
+            "entity_not_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "targetType",
-  "linkType",
-  "linkMbid",
-  "entities",
-  "offset",
-  "totalCount"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "name",
+      "aliases",
+      "tags",
+      "releaseGroups",
+      "relationships",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no artist exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_mbid",
+            "entity_not_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "mbid",
-  "name",
-  "aliases",
-  "tags",
-  "releaseGroups",
-  "relationships",
-  "externalLinks"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "entityType",
+      "images",
+      "hasArt"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (the upstream returns HTTP 400). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_mbid"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "mbid",
-  "entityType",
-  "images",
-  "hasArt"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "name",
+      "aliases",
+      "tags",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no label exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_mbid",
+            "entity_not_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "mbid",
-  "name",
-  "aliases",
-  "tags",
-  "externalLinks"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "isrcs",
+      "releases",
+      "relationships",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no recording exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_mbid",
+            "entity_not_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "mbid",
-  "title",
-  "artistCredit",
-  "artistCreditString",
-  "isrcs",
-  "releases",
-  "relationships",
-  "externalLinks"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "labelInfo",
+      "media",
+      "coverArt"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no release exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_mbid",
+            "entity_not_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "mbid",
-  "title",
-  "artistCredit",
-  "artistCreditString",
-  "labelInfo",
-  "media",
-  "coverArt"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "artistCredit",
+      "artistCreditString",
+      "releases",
+      "tags",
+      "coverArt"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no release-group exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_mbid",
+            "entity_not_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "mbid",
-  "title",
-  "artistCredit",
-  "artistCreditString",
-  "releases",
-  "tags",
-  "coverArt"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "mbid",
+      "title",
+      "languages",
+      "iswcs",
+      "aliases",
+      "tags",
+      "relationships",
+      "externalLinks"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `invalid_mbid`: The MBID is malformed or the all-zeros sentinel (MusicBrainz returns HTTP 400). `entity_not_found`: The MBID is well-formed but no work exists with it (MusicBrainz returns HTTP 404). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "invalid_mbid",
+            "entity_not_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "mbid",
-  "title",
-  "languages",
-  "iswcs",
-  "aliases",
-  "tags",
-  "relationships",
-  "externalLinks"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "result"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `identifier_not_found`: The identifier is well-formed but resolves to zero entities. `invalid_identifier`: The ISRC/ISWC is malformed (the dedicated endpoint returns HTTP 400). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "identifier_not_found",
+            "invalid_identifier"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "result"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "entityType",
+      "results",
+      "effectiveQuery",
+      "totalCount"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode.",
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "entityType",
-  "results",
-  "effectiveQuery",
-  "totalCount"
-]

Added value: +{
+  "description": "The one-page cap that was applied. Absent when not truncated.",
+  "type": "number"
+}

Added value: +{
+  "description": "How to fetch the complete list of editions when truncated.",
+  "type": "string"
+}

Previous value: -"Releases (editions) in this group (may be empty)."New value: +"Releases (editions) in this group (one page; may be empty or capped — use browse for all)."

Added value: +{
+  "description": "Number of releases returned. Absent when not truncated.",
+  "type": "number"
+}

Added value: +{
+  "description": "True when the releases list hit the one-page cap and more editions exist. Absent when the full set fit in one page.",
+  "type": "boolean"
+}

Removed value: -{
-  "description": "The one-page cap that was applied. Absent when not truncated.",
-  "type": "number"
-}

Removed value: -{
-  "description": "How to fetch the complete list of recordings of this work when truncated.",
-  "type": "string"
-}

Previous value: -"Writer/composer/lyricist relationships and recording-rels (may be empty; recording-rels capped at one page)."New value: +"Writer/composer/lyricist relationships and recording-rels — the complete set (may be empty)."

Removed value: -{
-  "description": "Number of recording relationships returned. Absent when not truncated.",
-  "type": "number"
-}

Removed value: -{
-  "description": "True when the recording relationships hit the one-page cap. Absent when the full set fit in one page.",
-  "type": "boolean"
-}

Previous value: -"The identifier value. ISRC e.g. \"USRC17607839\"; ISWC e.g. \"T-345246800-1\"; barcode e.g. \"075678164125\"."New value: +"The identifier value. ISRC e.g. \"USRC17607839\"; ISWC e.g. \"T-010.140.236-1\"; barcode e.g. \"075678164125\"."

Previous value: -[
-  {
-    "additionalProperties": false,
-    "description": "ISRC result arm: recordings carrying the ISRC.",
-    "properties": {
-      "identifier": {
-        "description": "The looked-up identifier value.",
-        "type": "string"
-      },
-      "kind": {
-        "const": "recordings",
-        "description": "ISRC resolved to recordings.",
-        "type": "string"
-      },
-      "recordings": {
-        "description": "Recordings carrying this ISRC.",
-        "items": {
-          "additionalProperties": false,
-          "description": "A recording carrying the looked-up ISRC.",
-          "properties": {
-            "artistCredit": {
-              "description": "Credited artist string.",
-              "type": "string"
-            },
-            "length": {
-              "description": "Recording length as m:ss. Omitted when unknown.",
-              "type": "string"
-            },
-            "mbid": {
-              "description": "Recording MBID — chain to musicbrainz_get_recording.",
-              "type": "string"
-            },
-            "title": {
-              "description": "Recording title.",
-              "type": "string"
-            }
-          },
-          "required": [
-            "mbid",
-            "title",
-            "artistCredit"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "kind",
-      "identifier",
-      "recordings"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "ISWC result arm: works carrying the ISWC.",
-    "properties": {
-      "identifier": {
-        "description": "The looked-up identifier value.",
-        "type": "string"
-      },
-      "kind": {
-        "const": "works",
-        "description": "ISWC resolved to works.",
-        "type": "string"
-      },
-      "works": {
-        "description": "Works carrying this ISWC.",
-        "items": {
-          "additionalProperties": false,
-          "description": "A work carrying the looked-up ISWC.",
-          "properties": {
-            "mbid": {
-              "description": "Work MBID — chain to musicbrainz_get_work.",
-              "type": "string"
-            },
-            "title": {
-              "description": "Work title.",
-              "type": "string"
-            },
-            "type": {
-              "description": "Work type. Omitted when absent.",
-              "type": "string"
-            }
-          },
-          "required": [
-            "mbid",
-            "title"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "kind",
-      "identifier",
-      "works"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Barcode result arm: releases carrying the barcode.",
-    "properties": {
-      "identifier": {
-        "description": "The looked-up identifier value.",
-        "type": "string"
-      },
-      "kind": {
-        "const": "releases",
-        "description": "Barcode resolved to releases.",
-        "type": "string"
-      },
-      "releases": {
-        "description": "Releases carrying this barcode (ranked).",
-        "items": {
-          "additionalProperties": false,
-          "description": "A release carrying the looked-up barcode.",
-          "properties": {
-            "artistCredit": {
-              "description": "Credited artist string.",
-              "type": "string"
-            },
-            "country": {
-              "description": "Release country code. Omitted when absent.",
-              "type": "string"
-            },
-            "date": {
-              "description": "Release date. Omitted when absent.",
-              "type": "string"
-            },
-            "mbid": {
-              "description": "Release MBID — chain to musicbrainz_get_release.",
-              "type": "string"
-            },
-            "score": {
-              "description": "Lucene relevance score, 0–100 (barcode is a search filter; exact = 100).",
-              "type": "number"
-            },
-            "title": {
-              "description": "Release title.",
-              "type": "string"
-            }
-          },
-          "required": [
-            "mbid",
-            "title",
-            "artistCredit",
-            "score"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "kind",
-      "identifier",
-      "releases"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "description": "ISRC result arm: recordings carrying the ISRC.",
+    "properties": {
+      "identifier": {
+        "description": "The looked-up identifier value.",
+        "type": "string"
+      },
+      "kind": {
+        "const": "recordings",
+        "description": "ISRC resolved to recordings.",
+        "type": "string"
+      },
+      "recordings": {
+        "description": "Recordings carrying this ISRC.",
+        "items": {
+          "additionalProperties": false,
+          "description": "A recording carrying the looked-up ISRC.",
+          "properties": {
+            "artistCredit": {
+              "description": "Credited artist string; falls back to \"Unknown artist\" when none is recorded.",
+              "type": "string"
+            },
+            "length": {
+              "description": "Recording length as m:ss. Omitted when unknown.",
+              "type": "string"
+            },
+            "mbid": {
+              "description": "Recording MBID — chain to musicbrainz_get_recording.",
+              "type": "string"
+            },
+            "title": {
+              "description": "Recording title.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "mbid",
+            "title",
+            "artistCredit"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      }
+    },
+    "required": [
+      "kind",
+      "identifier",
+      "recordings"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "ISWC result arm: works carrying the ISWC.",
+    "properties": {
+      "identifier": {
+        "description": "The looked-up identifier value.",
+        "type": "string"
+      },
+      "kind": {
+        "const": "works",
+        "description": "ISWC resolved to works.",
+        "type": "string"
+      },
+      "works": {
+        "description": "Works carrying this ISWC.",
+        "items": {
+          "additionalProperties": false,
+          "description": "A work carrying the looked-up ISWC.",
+          "properties": {
+            "mbid": {
+              "description": "Work MBID — chain to musicbrainz_get_work.",
+              "type": "string"
+            },
+            "title": {
+              "description": "Work title.",
+              "type": "string"
+            },
+            "type": {
+              "description": "Work type. Omitted when absent.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "mbid",
+            "title"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      }
+    },
+    "required": [
+      "kind",
+      "identifier",
+      "works"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Barcode result arm: releases carrying the barcode.",
+    "properties": {
+      "identifier": {
+        "description": "The looked-up identifier value.",
+        "type": "string"
+      },
+      "kind": {
+        "const": "releases",
+        "description": "Barcode resolved to releases.",
+        "type": "string"
+      },
+      "releases": {
+        "description": "Releases carrying this barcode (ranked).",
+        "items": {
+          "additionalProperties": false,
+          "description": "A release carrying the looked-up barcode.",
+          "properties": {
+            "artistCredit": {
+              "description": "Credited artist string.",
+              "type": "string"
+            },
+            "country": {
+              "description": "Release country code. Omitted when absent.",
+              "type": "string"
+            },
+            "date": {
+              "description": "Release date. Omitted when absent.",
+              "type": "string"
+            },
+            "mbid": {
+              "description": "Release MBID — chain to musicbrainz_get_release.",
+              "type": "string"
+            },
+            "score": {
+              "description": "Lucene relevance score, 0–100 (barcode is a search filter; exact = 100).",
+              "type": "number"
+            },
+            "title": {
+              "description": "Release title.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "mbid",
+            "title",
+            "artistCredit",
+            "score"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      }
+    },
+    "required": [
+      "kind",
+      "identifier",
+      "releases"
+    ],
+    "type": "object"
+  }
+]