From dfed3e6f092f5b681ae964989aa2d906cc8cd64d Mon Sep 17 00:00:00 2001
From: Jack Harper <harps912@gmail.com>
Date: Mon, 19 Jan 2026 15:25:31 +0000
Subject: [PATCH 1/3] wip - add run start metadata

---
 run_start_metadata_schema.json | 62 ++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 run_start_metadata_schema.json

diff --git a/run_start_metadata_schema.json b/run_start_metadata_schema.json
new file mode 100644
index 0000000..44e6562
--- /dev/null
+++ b/run_start_metadata_schema.json
@@ -0,0 +1,62 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/ISISComputingGroup/DataStreaming/blob/main/run_start_metadata_schema.json",
+  "title": "run_start_metadata_schema",
+  "description": "Schema for run start metadata used at ISIS for kafka_dae_diagnostics",
+  "type": "object",
+  "properties": {
+    "num_periods": {
+      "description": "The maximum number of periods for this run",
+      "type": "integer"
+    },
+    "num_time_channels": {
+      "description": "The maximum number of time channels for this run",
+      "type":"integer"
+    },
+    "time_regimes": {
+      "description": "The time regimes for this run",
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "array",
+        "description": "time regime rows",
+        "items": {
+          "type":"object",
+          "description": "time regime row",
+          "properties": {
+            "from": {
+              "type": "number"
+            },
+            "to": {
+              "type": "number"
+            },
+            "steps": {
+              "type": "number"
+            },
+            "mode": {
+              "enum": ["dT = C", "dT/T = C", "dT/T**2 = C", "Shifted"]
+            }
+          }
+        }
+      }
+    },
+    "vetos": {
+      "description": "The vetos for this run",
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string"
+          },
+          "enabled": {
+            "type": "boolean"
+          }
+        }
+      }
+    }
+  },
+  "required": ["num_periods", "num_time_channels", "time_regimes", "vetos"]
+}
+

From 1fc9b9ad68220e6c6e04026f708b6a191faac738 Mon Sep 17 00:00:00 2001
From: Jack Harper <harps912@gmail.com>
Date: Mon, 19 Jan 2026 15:27:44 +0000
Subject: [PATCH 2/3] maximum -> total

---
 run_start_metadata_schema.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/run_start_metadata_schema.json b/run_start_metadata_schema.json
index 44e6562..ef45c5a 100644
--- a/run_start_metadata_schema.json
+++ b/run_start_metadata_schema.json
@@ -6,11 +6,11 @@
   "type": "object",
   "properties": {
     "num_periods": {
-      "description": "The maximum number of periods for this run",
+      "description": "The total number of periods for this run",
       "type": "integer"
     },
     "num_time_channels": {
-      "description": "The maximum number of time channels for this run",
+      "description": "The total number of time channels for this run",
       "type":"integer"
     },
     "time_regimes": {

From f3c908601b80963289578654a583e6bfea8dff7e Mon Sep 17 00:00:00 2001
From: Jack Harper <jack.harper@stfc.ac.uk>
Date: Tue, 20 Jan 2026 11:34:18 +0000
Subject: [PATCH 3/3] allow arbitrary time regimes, rename num_time_channels to
 max_time_channels

---
 run_start_metadata_schema.json | 61 ++++++++++++++++++++++------------
 1 file changed, 39 insertions(+), 22 deletions(-)

diff --git a/run_start_metadata_schema.json b/run_start_metadata_schema.json
index ef45c5a..41cc027 100644
--- a/run_start_metadata_schema.json
+++ b/run_start_metadata_schema.json
@@ -6,37 +6,50 @@
   "type": "object",
   "properties": {
     "num_periods": {
-      "description": "The total number of periods for this run",
+      "description": "The total number of periods for this run, 1 indexed.",
       "type": "integer"
     },
-    "num_time_channels": {
-      "description": "The total number of time channels for this run",
-      "type":"integer"
+    "max_time_channels": {
+      "description": "The maximum number of time channels for this run.",
+      "type": "integer"
     },
     "time_regimes": {
-      "description": "The time regimes for this run",
+      "description": "The time regimes for this run.",
       "type": "array",
       "minItems": 1,
       "items": {
         "type": "array",
         "description": "time regime rows",
         "items": {
-          "type":"object",
-          "description": "time regime row",
-          "properties": {
-            "from": {
-              "type": "number"
-            },
-            "to": {
-              "type": "number"
+          "$comment": "Either linear time regime rows, or an arbitrary list of bin-edges.",
+          "oneOf": [
+            {
+              "type": "object",
+              "description": "time regime row",
+              "properties": {
+                "from": {
+                  "type": "number"
+                },
+                "to": {
+                  "type": "number"
+                },
+                "steps": {
+                  "type": "number"
+                },
+                "mode": {
+                  "enum": [
+                    "dT = C",
+                    "dT/T = C",
+                    "dT/T**2 = C",
+                    "Shifted"
+                  ]
+                }
+              }
             },
-            "steps": {
-              "type": "number"
-            },
-            "mode": {
-              "enum": ["dT = C", "dT/T = C", "dT/T**2 = C", "Shifted"]
+            {
+              "type": "integer"
             }
-          }
+          ]
         }
       }
     },
@@ -57,6 +70,10 @@
       }
     }
   },
-  "required": ["num_periods", "num_time_channels", "time_regimes", "vetos"]
-}
-
+  "required": [
+    "num_periods",
+    "num_time_channels",
+    "time_regimes",
+    "vetos"
+  ]
+}
\ No newline at end of file