v0.9.0: registry.release-manifest@1 (GET /release.json, ADR-016)

ddiff --git a/contracts/catalog.json b/contracts/catalog.json
iindex 05ae5fb3..2e77bb70 100644
---- a/contracts/catalog.json
++++ b/contracts/catalog.json
@@@ -107,6 +107,16 @@
        "visibility": "public",
        "compatibility": "backward",
        "status": "active"
++    },
++    {
++      "id": "registry.release-manifest",
++      "version": "1.0.0",
++      "owner": "network",
++      "schema": "registry/release-manifest.v1.json",
++      "visibility": "public",
++      "compatibility": "backward",
++      "status": "active",
++      "adr": "ADR-016"
      }
    ]
  }
ddiff --git a/contracts/registry/release-manifest.v1.json b/contracts/registry/release-manifest.v1.json
nnew file mode 100644
iindex 00000000..94eb2522
---- /dev/null
++++ b/contracts/registry/release-manifest.v1.json
@@@ -0,0 +1,23 @@
++{
++  "$schema": "https://json-schema.org/draft/2020-12/schema",
++  "$id": "https://openvibe.network/contracts/registry/release-manifest.v1.json",
++  "title": "ReleaseManifest",
++  "description": "What a running web surface is serving (GET /release.json, ADR-016). Open clients compare it on focus and reconnect; a client outside the supported window is prompted and reloads only when that is safe.",
++  "type": "object",
++  "required": ["service", "release", "released_at", "contracts_version", "min_client_release", "mixed_version_window_hours"],
++  "additionalProperties": false,
++  "properties": {
++    "service": { "type": "string", "pattern": "^[a-z][a-z0-9-]{1,39}$" },
++    "release": { "type": "string", "pattern": "^[0-9a-f]{7,40}$", "description": "The deployed commit (short sha)." },
++    "released_at": { "type": "string", "format": "date-time", "description": "Commit time of the release." },
++    "booted_at": { "type": "string", "format": "date-time" },
++    "contracts_version": { "type": ["string", "null"], "description": "openvibe-contracts version the service runs against." },
++    "packages": {
++      "type": "object",
++      "description": "Versions of the platform packages the page loads (openvibe-shared, openvibe-sdk, ...).",
++      "additionalProperties": { "type": "string" }
++    },
++    "min_client_release": { "type": ["string", "null"], "description": "Oldest client release still supported; null while every client in the window is." },
++    "mixed_version_window_hours": { "type": "integer", "minimum": 0 }
++  }
++}
ddiff --git a/fixtures/registry.release-manifest/invalid/bad-release.json b/fixtures/registry.release-manifest/invalid/bad-release.json
nnew file mode 100644
iindex 00000000..9fcf21be
---- /dev/null
++++ b/fixtures/registry.release-manifest/invalid/bad-release.json
@@@ -0,0 +1,8 @@
++{
++  "service": "live",
++  "release": "main",
++  "released_at": "2026-09-23T01:28:10Z",
++  "contracts_version": "0.8.0",
++  "min_client_release": null,
++  "mixed_version_window_hours": 24
++}
ddiff --git a/fixtures/registry.release-manifest/invalid/no-window.json b/fixtures/registry.release-manifest/invalid/no-window.json
nnew file mode 100644
iindex 00000000..54ff5d34
---- /dev/null
++++ b/fixtures/registry.release-manifest/invalid/no-window.json
@@@ -0,0 +1,7 @@
++{
++  "service": "live",
++  "release": "8a678c8",
++  "released_at": "2026-09-23T01:28:10Z",
++  "contracts_version": "0.8.0",
++  "min_client_release": null
++}
ddiff --git a/fixtures/registry.release-manifest/valid/live.json b/fixtures/registry.release-manifest/valid/live.json
nnew file mode 100644
iindex 00000000..a1a3a5f7
---- /dev/null
++++ b/fixtures/registry.release-manifest/valid/live.json
@@@ -0,0 +1,10 @@
++{
++  "service": "live",
++  "release": "8a678c8",
++  "released_at": "2026-09-23T01:28:10Z",
++  "booted_at": "2026-09-23T01:31:52Z",
++  "contracts_version": "0.8.0",
++  "packages": { "openvibe-shared": "1.0.0", "openvibe-sdk": "0.2.2" },
++  "min_client_release": null,
++  "mixed_version_window_hours": 24
++}
ddiff --git a/generated/json-schema/bundle.json b/generated/json-schema/bundle.json
iindex fa6a1e0d..073780ba 100644
---- a/generated/json-schema/bundle.json
++++ b/generated/json-schema/bundle.json
@@@ -800,6 +800,72 @@
            }
          }
        }
++    },
++    "registry.release-manifest": {
++      "version": "1.0.0",
++      "owner": "network",
++      "status": "active",
++      "schema": {
++        "$schema": "https://json-schema.org/draft/2020-12/schema",
++        "$id": "https://openvibe.network/contracts/registry/release-manifest.v1.json",
++        "title": "ReleaseManifest",
++        "description": "What a running web surface is serving (GET /release.json, ADR-016). Open clients compare it on focus and reconnect; a client outside the supported window is prompted and reloads only when that is safe.",
++        "type": "object",
++        "required": [
++          "service",
++          "release",
++          "released_at",
++          "contracts_version",
++          "min_client_release",
++          "mixed_version_window_hours"
++        ],
++        "additionalProperties": false,
++        "properties": {
++          "service": {
++            "type": "string",
++            "pattern": "^[a-z][a-z0-9-]{1,39}$"
++          },
++          "release": {
++            "type": "string",
++            "pattern": "^[0-9a-f]{7,40}$",
++            "description": "The deployed commit (short sha)."
++          },
++          "released_at": {
++            "type": "string",
++            "format": "date-time",
++            "description": "Commit time of the release."
++          },
++          "booted_at": {
++            "type": "string",
++            "format": "date-time"
++          },
++          "contracts_version": {
++            "type": [
++              "string",
++              "null"
++            ],
++            "description": "openvibe-contracts version the service runs against."
++          },
++          "packages": {
++            "type": "object",
++            "description": "Versions of the platform packages the page loads (openvibe-shared, openvibe-sdk, ...).",
++            "additionalProperties": {
++              "type": "string"
++            }
++          },
++          "min_client_release": {
++            "type": [
++              "string",
++              "null"
++            ],
++            "description": "Oldest client release still supported; null while every client in the window is."
++          },
++          "mixed_version_window_hours": {
++            "type": "integer",
++            "minimum": 0
++          }
++        }
++      }
      }
    }
  }
ddiff --git a/generated/typescript/index.d.ts b/generated/typescript/index.d.ts
iindex 360d6995..42a9c934 100644
---- a/generated/typescript/index.d.ts
++++ b/generated/typescript/index.d.ts
@@@ -251,3 +251,35 @@ export interface ModuleRecord {
     */
    updated_by?: string;
  }
++
++/** [email protected] (owner: network) */
++/**
++ * What a running web surface is serving (GET /release.json, ADR-016). Open clients compare it on focus and reconnect; a client outside the supported window is prompted and reloads only when that is safe.
++ */
++export interface ReleaseManifest {
++  service: string;
++  /**
++   * The deployed commit (short sha).
++   */
++  release: string;
++  /**
++   * Commit time of the release.
++   */
++  released_at: string;
++  booted_at?: string;
++  /**
++   * openvibe-contracts version the service runs against.
++   */
++  contracts_version: string | null;
++  /**
++   * Versions of the platform packages the page loads (openvibe-shared, openvibe-sdk, ...).
++   */
++  packages?: {
++    [k: string]: string | undefined;
++  };
++  /**
++   * Oldest client release still supported; null while every client in the window is.
++   */
++  min_client_release: string | null;
++  mixed_version_window_hours: number;
++}
ddiff --git a/package.json b/package.json
iindex 0719350c..2736a95c 100644
---- a/package.json
++++ b/package.json
@@@ -1,6 +1,6 @@
  {
    "name": "openvibe-contracts",
--  "version": "0.8.0",
++  "version": "0.9.0",
    "description": "Machine-readable contracts for the OpenVibe network: schemas, manifests, ids, error envelope, capability checks.",
    "main": "index.js",
    "types": "generated/typescript/index.d.ts",