feat(probe): YJ-01 real-probe 7-stage dataset + probe design branch in pipeline/CLI

9 files changed, 1002 insertions, 22 deletions

diff --git a/src/SomhairlesDream.Cli/Arguments.fs b/src/SomhairlesDream.Cli/Arguments.fs
index 2de96be..fa9087b 100644
--- a/src/SomhairlesDream.Cli/Arguments.fs
+++ b/src/SomhairlesDream.Cli/Arguments.fs
@@ -9,7 +9,8 @@ type RunOptions =
       OutputRoot: string
       StageRoot: string
       Python: string
-      Render: bool }
+      Render: bool
+      Design: string }
 
 type Command =
     | Run of RunOptions
@@ -19,22 +20,32 @@ type Command =
 module Arguments =
     let usage =
         "usage: dotnet run --project src/SomhairlesDream.Cli -- run [options]\n"
-        + "       dotnet run --project src/SomhairlesDream.Cli -- verify <manifest.json>"
+        + "       dotnet run --project src/SomhairlesDream.Cli -- verify <manifest.json>\n"
+        + "options: --project-id --run-id --base-id --target-id --output-root --stage-root --python --render --design heritage|probe"
 
     let private defaultPython () =
         let configured = Environment.GetEnvironmentVariable("SOMHAIRLES_BPYTHON")
         if String.IsNullOrWhiteSpace(configured) then "python3" else configured
 
+    let private heritageIds =
+        { ProjectId = "heritage-001"
+          RunId = "run-001"
+          BaseId = "base-000"
+          TargetId = "target-003" }
+
+    let private probeIds =
+        { ProjectId = "probe-001"
+          RunId = "run-001"
+          BaseId = "probe-base-000"
+          TargetId = "probe-target-007" }
+
     let private defaults () =
-        { Ids =
-              { ProjectId = "heritage-001"
-                RunId = "run-001"
-                BaseId = "base-000"
-                TargetId = "target-003" }
+        { Ids = heritageIds
           OutputRoot = ".artifacts"
           StageRoot = "stage"
           Python = defaultPython ()
-          Render = false }
+          Render = false
+          Design = "heritage" }
 
     let private requiredValue (args: string array) (index: int) (optionName: string) =
         if index + 1 >= args.Length || String.IsNullOrWhiteSpace(args[index + 1]) then
@@ -51,14 +62,34 @@ module Arguments =
         | "--output-root" -> Ok { options with OutputRoot = value }
         | "--stage-root" -> Ok { options with StageRoot = value }
         | "--python" -> Ok { options with Python = value }
+        | "--design" -> Ok { options with Design = value }
         | _ -> Error $"unknown option: {optionName}"
 
+    let private resolveIds (options: RunOptions) =
+        if options.Design = "probe" then
+            let swap heritage probe value = if value = heritage then probe else value
+
+            let ids =
+                { ProjectId = swap heritageIds.ProjectId probeIds.ProjectId options.Ids.ProjectId
+                  RunId = swap heritageIds.RunId probeIds.RunId options.Ids.RunId
+                  BaseId = swap heritageIds.BaseId probeIds.BaseId options.Ids.BaseId
+                  TargetId = swap heritageIds.TargetId probeIds.TargetId options.Ids.TargetId }
+
+            { options with Ids = ids }
+        else
+            options
+
     let private validateRunOptions (options: RunOptions) =
-        [| options.Ids.ProjectId; options.Ids.RunId; options.Ids.BaseId; options.Ids.TargetId |]
-        |> Array.tryFind (Ids.validateResourceId >> Result.isError)
-        |> function
-            | Some value -> Error $"invalid resource id: {value}"
-            | None -> Ok(Run options)
+        if options.Design <> "heritage" && options.Design <> "probe" then
+            Error $"invalid design: {options.Design}"
+        else
+            let resolved = resolveIds options
+
+            [| resolved.Ids.ProjectId; resolved.Ids.RunId; resolved.Ids.BaseId; resolved.Ids.TargetId |]
+            |> Array.tryFind (Ids.validateResourceId >> Result.isError)
+            |> function
+                | Some value -> Error $"invalid resource id: {value}"
+                | None -> Ok(Run resolved)
 
     let private parseRun (args: string array) =
         let rec loop (index: int) (options: RunOptions) =
diff --git a/src/SomhairlesDream.Cli/Program.fs b/src/SomhairlesDream.Cli/Program.fs
index 0d9ed1c..dd58ff0 100644
--- a/src/SomhairlesDream.Cli/Program.fs
+++ b/src/SomhairlesDream.Cli/Program.fs
@@ -14,6 +14,7 @@ module Program =
         let pipelineOptions : PipelineOptions =
             { ArtifactRoot = options.OutputRoot
               Ids = options.Ids
+              Steps = if options.Design = "probe" then Design.probeSteps else Design.steps
               Render = options.Render
               Bridge = bridge
               Clock = fun () -> DateTimeOffset.UtcNow
diff --git a/src/SomhairlesDream.Modeling/BlenderBridge.fs b/src/SomhairlesDream.Modeling/BlenderBridge.fs
index c0795e9..c4215ae 100644
--- a/src/SomhairlesDream.Modeling/BlenderBridge.fs
+++ b/src/SomhairlesDream.Modeling/BlenderBridge.fs
@@ -101,8 +101,13 @@ type BlenderProcessBridge(python: string, stageRoot: string, ?timeout: TimeSpan)
 
         File.WriteAllText(path, content)
 
-    member private _.StartInfo(request: BridgeRequest) =
-        let scriptPath = Path.GetFullPath(Path.Combine(stageRoot, "blender", "fixture.py"))
+    member private _.ScriptPath(stepId: string) =
+        let scriptName = if stepId.StartsWith("probe-") then "probe.py" else "fixture.py"
+
+        Path.GetFullPath(Path.Combine(stageRoot, "blender", scriptName))
+
+    member private this.StartInfo(request: BridgeRequest) =
+        let scriptPath = this.ScriptPath(request.Step.StepId)
         let info = ProcessStartInfo()
         info.FileName <- python
         info.UseShellExecute <- false
@@ -128,10 +133,10 @@ type BlenderProcessBridge(python: string, stageRoot: string, ?timeout: TimeSpan)
     interface IArtifactBridge with
         member this.Export(request, heartbeat) =
             try
-                let scriptPath = Path.GetFullPath(Path.Combine(stageRoot, "blender", "fixture.py"))
+                let scriptPath = this.ScriptPath(request.Step.StepId)
 
                 if not (File.Exists(scriptPath)) then
-                    Error(bridgeError $"fixture is missing: {scriptPath}")
+                    Error(bridgeError $"blender script is missing: {scriptPath}")
                 else
                     match Path.GetDirectoryName(request.GlbPath) with
                     | null -> ()
diff --git a/src/SomhairlesDream.Modeling/Definitions.fs b/src/SomhairlesDream.Modeling/Definitions.fs
index 64e6bc6..9a9256e 100644
--- a/src/SomhairlesDream.Modeling/Definitions.fs
+++ b/src/SomhairlesDream.Modeling/Definitions.fs
@@ -29,3 +29,68 @@ module Design =
              Changes =
                  [| { ObjectId = "heritage.cabin"; Kind = "add"; Summary = "Add cabin volume" }
                     { ObjectId = "heritage.crossbeam"; Kind = "add"; Summary = "Add cabin crossbeam" } |] } |]
+
+    // YJ-01 Voyager-class current-tech probe (source: interstellar-dual-track/current-tech-probe
+    // scripts/build_probe.py, line ranges cited per step). Object ids map the legacy
+    // UPPER_SNAKE names onto lowercase dotted ids via documented rule
+    // (probe.bus.bay.panel.00 <- BUS_BAY_PANEL_00, probe.rtg.01.fin.00 <- RTG_01_FIN_0).
+    // Display plinth, information card and MODEL_LABEL are intentionally excluded.
+    let probeSteps : DesignStep array =
+        let bus =
+            [| "probe.bus.electronics.decagon"; "probe.bus.ring.front"; "probe.bus.ring.rear"
+               "probe.bus.bay.panel.00"; "probe.bus.bay.panel.01"; "probe.bus.bay.panel.02"
+               "probe.bus.bay.panel.03"; "probe.bus.bay.panel.04"; "probe.bus.bay.panel.05"
+               "probe.bus.bay.panel.06"; "probe.bus.bay.panel.07"; "probe.bus.bay.panel.08"
+               "probe.bus.bay.panel.09"
+               "probe.bus.mli.top"; "probe.bus.mli.bottom"
+               "probe.bus.radiator.port"; "probe.bus.radiator.starboard"
+               "probe.aacs"
+               "probe.thruster.01"; "probe.thruster.02"; "probe.thruster.03"; "probe.thruster.04" |]
+        let booms =
+            [| "probe.rtg.boom"
+               "probe.mag.boom"; "probe.mag.head"; "probe.mag.sensor.a"; "probe.mag.sensor.b"
+               "probe.pws.antenna.left"; "probe.pws.antenna.right"
+               "probe.pws.tip.left"; "probe.pws.tip.right" |]
+        let rtgs =
+            [| "probe.rtg.01"; "probe.rtg.01.fin.00"; "probe.rtg.01.fin.01"; "probe.rtg.01.fin.02"
+               "probe.rtg.02"; "probe.rtg.02.fin.00"; "probe.rtg.02.fin.01"; "probe.rtg.02.fin.02"
+               "probe.rtg.03"; "probe.rtg.03.fin.00"; "probe.rtg.03.fin.01"; "probe.rtg.03.fin.02" |]
+        let hga =
+            [| "probe.hga.reflector"; "probe.hga.feed"
+               "probe.hga.strut.00"; "probe.hga.strut.01"; "probe.hga.strut.02"; "probe.hga.strut.03" |]
+        let instruments =
+            [| "probe.scan.pivot"; "probe.scan.platform"
+               "probe.crs"; "probe.plasma"; "probe.optical"; "probe.optical.aperture" |]
+        let mast = [| "probe.science.boom" |]
+        let prior (prefix: string array) (current: string array) =
+            Array.append prefix current
+
+        let busChanges = bus |> Array.map (fun id -> { ObjectId = id; Kind = "add"; Summary = "Add ten-sided bus with bay panels, MLI and radiators" })
+        let boomChanges = booms |> Array.map (fun id -> { ObjectId = id; Kind = "add"; Summary = "Add fields-and-particles and RTG support booms" })
+        let rtgChanges = rtgs |> Array.map (fun id -> { ObjectId = id; Kind = "add"; Summary = "Add three RTGs with heat-rejection fins" })
+        let hgaChanges = hga |> Array.map (fun id -> { ObjectId = id; Kind = "add"; Summary = "Add high-gain antenna, feed and struts" })
+        let instrumentChanges = instruments |> Array.map (fun id -> { ObjectId = id; Kind = "add"; Summary = "Add articulated scan platform with science instruments" })
+        let mastChanges = mast |> Array.map (fun id -> { ObjectId = id; Kind = "add"; Summary = "Add deployable science mast" })
+        let liveryChanges =
+            [| { ObjectId = "probe.hga.reflector"; Kind = "update"; Summary = "Livery pass: reflector white finish" }
+               { ObjectId = "probe.bus.mli.top"; Kind = "update"; Summary = "Livery pass: MLI gold foil finish" }
+               { ObjectId = "probe.bus.bay.panel.01"; Kind = "update"; Summary = "Livery pass: restrained red accents on bay panels" }
+               { ObjectId = "probe.pws.tip.left"; Kind = "update"; Summary = "Livery pass: red antenna tip markers" }
+               { ObjectId = "probe.bus.electronics.decagon"; Kind = "update"; Summary = "Livery pass: body blue basecoat" }
+               { ObjectId = "probe.rtg.01"; Kind = "update"; Summary = "Livery pass: graphite RTG housings" } |]
+
+        [| { StepId = "probe-01-bus"; Index = 0; ObjectIds = bus; Changes = busChanges }
+           { StepId = "probe-02-boom"; Index = 1; ObjectIds = prior bus booms; Changes = boomChanges }
+           { StepId = "probe-03-rtg"; Index = 2; ObjectIds = prior (prior bus booms) rtgs; Changes = rtgChanges }
+           { StepId = "probe-04-hga"; Index = 3; ObjectIds = prior (prior (prior bus booms) rtgs) hga; Changes = hgaChanges }
+           { StepId = "probe-05-instruments"; Index = 4
+             ObjectIds = prior (prior (prior (prior bus booms) rtgs) hga) instruments; Changes = instrumentChanges }
+           { StepId = "probe-06-mast"; Index = 5
+             ObjectIds = prior (prior (prior (prior (prior bus booms) rtgs) hga) instruments) mast
+             Changes = mastChanges }
+           { StepId = "probe-07-livery"; Index = 6
+             ObjectIds = prior (prior (prior (prior (prior (prior bus booms) rtgs) hga) instruments) mast) [||]
+             Changes = liveryChanges } |]
+
+    let forProject (projectId: string) : DesignStep array =
+        if projectId.StartsWith("probe-") then probeSteps else steps
diff --git a/src/SomhairlesDream.Modeling/Pipeline.fs b/src/SomhairlesDream.Modeling/Pipeline.fs
index 3f1f105..d9db5f6 100644
--- a/src/SomhairlesDream.Modeling/Pipeline.fs
+++ b/src/SomhairlesDream.Modeling/Pipeline.fs
@@ -33,6 +33,7 @@ type IArtifactBridge =
 type PipelineOptions =
     { ArtifactRoot: string
       Ids: RunIds
+      Steps: DesignStep array
       Render: bool
       Bridge: IArtifactBridge
       Clock: unit -> DateTimeOffset
@@ -214,10 +215,12 @@ module Pipeline =
                     let emit event = appendEvent log options.OnEvent event
                     let ids = options.Ids
 
-                    emit (RunEvent.Start { Ids = ids; At = startedAt; TotalSteps = Design.steps.Length })
+                    let steps = options.Steps
+
+                    emit (RunEvent.Start { Ids = ids; At = startedAt; TotalSteps = steps.Length })
 
                     let artifacts =
-                         [| for step in Design.steps do
+                         [| for step in steps do
                                currentStep <- Some step.StepId
                                emit (RunEvent.Heartbeat { Ids = ids; At = options.Clock(); Message = $"starting {step.StepId}" })
 
@@ -275,7 +278,7 @@ module Pipeline =
                                      At = options.Clock()
                                      StepId = step.StepId
                                      StepIndex = step.Index
-                                     TotalSteps = Design.steps.Length
+                                     TotalSteps = steps.Length
                                      Message = "artifact verified"
                                      ArtifactPath = relativePath }
 
@@ -424,12 +427,12 @@ module ArtifactVerifier =
                      || Ids.validateResourceId manifest.BaseId |> Result.isError
                      || Ids.validateResourceId manifest.TargetId |> Result.isError then
                     Error "manifest contains an invalid resource id"
-                elif manifest.Steps.Length <> Design.steps.Length then
+                elif manifest.Steps.Length <> (Design.forProject manifest.ProjectId).Length then
                     Error "manifest step count does not match design"
                 else
                     let mutable failure: string option = None
 
-                    for expected, actual in Array.zip Design.steps manifest.Steps do
+                    for expected, actual in Array.zip (Design.forProject manifest.ProjectId) manifest.Steps do
                         if failure.IsNone && actual.StepId <> expected.StepId then
                             failure <- Some $"manifest step id mismatch: {expected.StepId}"
                         elif failure.IsNone && actual.StepIndex <> expected.Index then
diff --git a/src/SomhairlesDream.Server/ArtifactRunCoordinator.fs b/src/SomhairlesDream.Server/ArtifactRunCoordinator.fs
index 022ac7d..07ac984 100644
--- a/src/SomhairlesDream.Server/ArtifactRunCoordinator.fs
+++ b/src/SomhairlesDream.Server/ArtifactRunCoordinator.fs
@@ -217,6 +217,7 @@ type ArtifactRunCoordinator(
             let options : PipelineOptions =
                 { ArtifactRoot = root
                   Ids = ids
+                  Steps = Design.forProject ids.ProjectId
                   Render = render
                   Bridge = bridgeFactory ()
                   Clock = clock
diff --git a/stage/blender/probe.py b/stage/blender/probe.py
new file mode 100644
index 0000000..aaffaf4
--- /dev/null
+++ b/stage/blender/probe.py
@@ -0,0 +1,816 @@
+"""YJ-01 Voyager-class current-tech probe dataset for the artifact pipeline.
+
+Geometry ported from the legacy reference model:
+    /home/somhairle/Projects/interstellar-dual-track/current-tech-probe/scripts/build_probe.py
+(line ranges cited per stage below). Object ids are mapped from the legacy
+UPPER_SNAKE names onto lowercase dotted ids, e.g.:
+
+    BUS_ELECTRONICS_DECAGON  -> probe.bus.electronics.decagon
+    BUS_BAY_PANEL_00         -> probe.bus.bay.panel.00
+    RTG_01_FIN_0             -> probe.rtg.01.fin.00
+    HGA_FEED_STRUT_3         -> probe.hga.strut.03
+    MAGNETOMETER_SENSOR_A    -> probe.mag.sensor.a
+
+Display plinth, information card and MODEL_LABEL are intentionally excluded.
+工程限制: 非飞行设计 heritage 参考.
+
+Contract (identical to fixture.py):
+    --step-id <id> --output <glb> --result-output <json> [--render-output <png>]
+"""
+
+import argparse
+import json
+import math
+import os
+import sys
+from datetime import datetime, timezone
+
+import bpy  # noqa: F401  (must be imported before mathutils: registers the bundled mathutils module)
+from mathutils import Vector
+
+# Cumulative object id lists per step. Must stay in lockstep with
+# Design.probeSteps in src/SomhairlesDream.Modeling/Definitions.fs.
+STEP_OBJECTS = {
+    "probe-01-bus": [
+        "probe.bus.electronics.decagon",
+        "probe.bus.ring.front",
+        "probe.bus.ring.rear",
+        "probe.bus.bay.panel.00",
+        "probe.bus.bay.panel.01",
+        "probe.bus.bay.panel.02",
+        "probe.bus.bay.panel.03",
+        "probe.bus.bay.panel.04",
+        "probe.bus.bay.panel.05",
+        "probe.bus.bay.panel.06",
+        "probe.bus.bay.panel.07",
+        "probe.bus.bay.panel.08",
+        "probe.bus.bay.panel.09",
+        "probe.bus.mli.top",
+        "probe.bus.mli.bottom",
+        "probe.bus.radiator.port",
+        "probe.bus.radiator.starboard",
+        "probe.aacs",
+        "probe.thruster.01",
+        "probe.thruster.02",
+        "probe.thruster.03",
+        "probe.thruster.04",
+    ],
+    "probe-02-boom": [
+        "probe.bus.electronics.decagon",
+        "probe.bus.ring.front",
+        "probe.bus.ring.rear",
+        "probe.bus.bay.panel.00",
+        "probe.bus.bay.panel.01",
+        "probe.bus.bay.panel.02",
+        "probe.bus.bay.panel.03",
+        "probe.bus.bay.panel.04",
+        "probe.bus.bay.panel.05",
+        "probe.bus.bay.panel.06",
+        "probe.bus.bay.panel.07",
+        "probe.bus.bay.panel.08",
+        "probe.bus.bay.panel.09",
+        "probe.bus.mli.top",
+        "probe.bus.mli.bottom",
+        "probe.bus.radiator.port",
+        "probe.bus.radiator.starboard",
+        "probe.aacs",
+        "probe.thruster.01",
+        "probe.thruster.02",
+        "probe.thruster.03",
+        "probe.thruster.04",
+        "probe.rtg.boom",
+        "probe.mag.boom",
+        "probe.mag.head",
+        "probe.mag.sensor.a",
+        "probe.mag.sensor.b",
+        "probe.pws.antenna.left",
+        "probe.pws.antenna.right",
+        "probe.pws.tip.left",
+        "probe.pws.tip.right",
+    ],
+    "probe-03-rtg": [
+        "probe.bus.electronics.decagon",
+        "probe.bus.ring.front",
+        "probe.bus.ring.rear",
+        "probe.bus.bay.panel.00",
+        "probe.bus.bay.panel.01",
+        "probe.bus.bay.panel.02",
+        "probe.bus.bay.panel.03",
+        "probe.bus.bay.panel.04",
+        "probe.bus.bay.panel.05",
+        "probe.bus.bay.panel.06",
+        "probe.bus.bay.panel.07",
+        "probe.bus.bay.panel.08",
+        "probe.bus.bay.panel.09",
+        "probe.bus.mli.top",
+        "probe.bus.mli.bottom",
+        "probe.bus.radiator.port",
+        "probe.bus.radiator.starboard",
+        "probe.aacs",
+        "probe.thruster.01",
+        "probe.thruster.02",
+        "probe.thruster.03",
+        "probe.thruster.04",
+        "probe.rtg.boom",
+        "probe.mag.boom",
+        "probe.mag.head",
+        "probe.mag.sensor.a",
+        "probe.mag.sensor.b",
+        "probe.pws.antenna.left",
+        "probe.pws.antenna.right",
+        "probe.pws.tip.left",
+        "probe.pws.tip.right",
+        "probe.rtg.01",
+        "probe.rtg.01.fin.00",
+        "probe.rtg.01.fin.01",
+        "probe.rtg.01.fin.02",
+        "probe.rtg.02",
+        "probe.rtg.02.fin.00",
+        "probe.rtg.02.fin.01",
+        "probe.rtg.02.fin.02",
+        "probe.rtg.03",
+        "probe.rtg.03.fin.00",
+        "probe.rtg.03.fin.01",
+        "probe.rtg.03.fin.02",
+    ],
+    "probe-04-hga": [
+        "probe.bus.electronics.decagon",
+        "probe.bus.ring.front",
+        "probe.bus.ring.rear",
+        "probe.bus.bay.panel.00",
+        "probe.bus.bay.panel.01",
+        "probe.bus.bay.panel.02",
+        "probe.bus.bay.panel.03",
+        "probe.bus.bay.panel.04",
+        "probe.bus.bay.panel.05",
+        "probe.bus.bay.panel.06",
+        "probe.bus.bay.panel.07",
+        "probe.bus.bay.panel.08",
+        "probe.bus.bay.panel.09",
+        "probe.bus.mli.top",
+        "probe.bus.mli.bottom",
+        "probe.bus.radiator.port",
+        "probe.bus.radiator.starboard",
+        "probe.aacs",
+        "probe.thruster.01",
+        "probe.thruster.02",
+        "probe.thruster.03",
+        "probe.thruster.04",
+        "probe.rtg.boom",
+        "probe.mag.boom",
+        "probe.mag.head",
+        "probe.mag.sensor.a",
+        "probe.mag.sensor.b",
+        "probe.pws.antenna.left",
+        "probe.pws.antenna.right",
+        "probe.pws.tip.left",
+        "probe.pws.tip.right",
+        "probe.rtg.01",
+        "probe.rtg.01.fin.00",
+        "probe.rtg.01.fin.01",
+        "probe.rtg.01.fin.02",
+        "probe.rtg.02",
+        "probe.rtg.02.fin.00",
+        "probe.rtg.02.fin.01",
+        "probe.rtg.02.fin.02",
+        "probe.rtg.03",
+        "probe.rtg.03.fin.00",
+        "probe.rtg.03.fin.01",
+        "probe.rtg.03.fin.02",
+        "probe.hga.reflector",
+        "probe.hga.feed",
+        "probe.hga.strut.00",
+        "probe.hga.strut.01",
+        "probe.hga.strut.02",
+        "probe.hga.strut.03",
+    ],
+    "probe-05-instruments": [
+        "probe.bus.electronics.decagon",
+        "probe.bus.ring.front",
+        "probe.bus.ring.rear",
+        "probe.bus.bay.panel.00",
+        "probe.bus.bay.panel.01",
+        "probe.bus.bay.panel.02",
+        "probe.bus.bay.panel.03",
+        "probe.bus.bay.panel.04",
+        "probe.bus.bay.panel.05",
+        "probe.bus.bay.panel.06",
+        "probe.bus.bay.panel.07",
+        "probe.bus.bay.panel.08",
+        "probe.bus.bay.panel.09",
+        "probe.bus.mli.top",
+        "probe.bus.mli.bottom",
+        "probe.bus.radiator.port",
+        "probe.bus.radiator.starboard",
+        "probe.aacs",
+        "probe.thruster.01",
+        "probe.thruster.02",
+        "probe.thruster.03",
+        "probe.thruster.04",
+        "probe.rtg.boom",
+        "probe.mag.boom",
+        "probe.mag.head",
+        "probe.mag.sensor.a",
+        "probe.mag.sensor.b",
+        "probe.pws.antenna.left",
+        "probe.pws.antenna.right",
+        "probe.pws.tip.left",
+        "probe.pws.tip.right",
+        "probe.rtg.01",
+        "probe.rtg.01.fin.00",
+        "probe.rtg.01.fin.01",
+        "probe.rtg.01.fin.02",
+        "probe.rtg.02",
+        "probe.rtg.02.fin.00",
+        "probe.rtg.02.fin.01",
+        "probe.rtg.02.fin.02",
+        "probe.rtg.03",
+        "probe.rtg.03.fin.00",
+        "probe.rtg.03.fin.01",
+        "probe.rtg.03.fin.02",
+        "probe.hga.reflector",
+        "probe.hga.feed",
+        "probe.hga.strut.00",
+        "probe.hga.strut.01",
+        "probe.hga.strut.02",
+        "probe.hga.strut.03",
+        "probe.scan.pivot",
+        "probe.scan.platform",
+        "probe.crs",
+        "probe.plasma",
+        "probe.optical",
+        "probe.optical.aperture",
+    ],
+    "probe-06-mast": [
+        "probe.bus.electronics.decagon",
+        "probe.bus.ring.front",
+        "probe.bus.ring.rear",
+        "probe.bus.bay.panel.00",
+        "probe.bus.bay.panel.01",
+        "probe.bus.bay.panel.02",
+        "probe.bus.bay.panel.03",
+        "probe.bus.bay.panel.04",
+        "probe.bus.bay.panel.05",
+        "probe.bus.bay.panel.06",
+        "probe.bus.bay.panel.07",
+        "probe.bus.bay.panel.08",
+        "probe.bus.bay.panel.09",
+        "probe.bus.mli.top",
+        "probe.bus.mli.bottom",
+        "probe.bus.radiator.port",
+        "probe.bus.radiator.starboard",
+        "probe.aacs",
+        "probe.thruster.01",
+        "probe.thruster.02",
+        "probe.thruster.03",
+        "probe.thruster.04",
+        "probe.rtg.boom",
+        "probe.mag.boom",
+        "probe.mag.head",
+        "probe.mag.sensor.a",
+        "probe.mag.sensor.b",
+        "probe.pws.antenna.left",
+        "probe.pws.antenna.right",
+        "probe.pws.tip.left",
+        "probe.pws.tip.right",
+        "probe.rtg.01",
+        "probe.rtg.01.fin.00",
+        "probe.rtg.01.fin.01",
+        "probe.rtg.01.fin.02",
+        "probe.rtg.02",
+        "probe.rtg.02.fin.00",
+        "probe.rtg.02.fin.01",
+        "probe.rtg.02.fin.02",
+        "probe.rtg.03",
+        "probe.rtg.03.fin.00",
+        "probe.rtg.03.fin.01",
+        "probe.rtg.03.fin.02",
+        "probe.hga.reflector",
+        "probe.hga.feed",
+        "probe.hga.strut.00",
+        "probe.hga.strut.01",
+        "probe.hga.strut.02",
+        "probe.hga.strut.03",
+        "probe.scan.pivot",
+        "probe.scan.platform",
+        "probe.crs",
+        "probe.plasma",
+        "probe.optical",
+        "probe.optical.aperture",
+        "probe.science.boom",
+    ],
+    "probe-07-livery": [
+        "probe.bus.electronics.decagon",
+        "probe.bus.ring.front",
+        "probe.bus.ring.rear",
+        "probe.bus.bay.panel.00",
+        "probe.bus.bay.panel.01",
+        "probe.bus.bay.panel.02",
+        "probe.bus.bay.panel.03",
+        "probe.bus.bay.panel.04",
+        "probe.bus.bay.panel.05",
+        "probe.bus.bay.panel.06",
+        "probe.bus.bay.panel.07",
+        "probe.bus.bay.panel.08",
+        "probe.bus.bay.panel.09",
+        "probe.bus.mli.top",
+        "probe.bus.mli.bottom",
+        "probe.bus.radiator.port",
+        "probe.bus.radiator.starboard",
+        "probe.aacs",
+        "probe.thruster.01",
+        "probe.thruster.02",
+        "probe.thruster.03",
+        "probe.thruster.04",
+        "probe.rtg.boom",
+        "probe.mag.boom",
+        "probe.mag.head",
+        "probe.mag.sensor.a",
+        "probe.mag.sensor.b",
+        "probe.pws.antenna.left",
+        "probe.pws.antenna.right",
+        "probe.pws.tip.left",
+        "probe.pws.tip.right",
+        "probe.rtg.01",
+        "probe.rtg.01.fin.00",
+        "probe.rtg.01.fin.01",
+        "probe.rtg.01.fin.02",
+        "probe.rtg.02",
+        "probe.rtg.02.fin.00",
+        "probe.rtg.02.fin.01",
+        "probe.rtg.02.fin.02",
+        "probe.rtg.03",
+        "probe.rtg.03.fin.00",
+        "probe.rtg.03.fin.01",
+        "probe.rtg.03.fin.02",
+        "probe.hga.reflector",
+        "probe.hga.feed",
+        "probe.hga.strut.00",
+        "probe.hga.strut.01",
+        "probe.hga.strut.02",
+        "probe.hga.strut.03",
+        "probe.scan.pivot",
+        "probe.scan.platform",
+        "probe.crs",
+        "probe.plasma",
+        "probe.optical",
+        "probe.optical.aperture",
+        "probe.science.boom",
+    ],
+}
+
+LIVERY_STEPS = {"probe-07-livery"}
+
+
+def utc_now():
+    return datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")
+
+
+def fail(message, code):
+    print(message, file=sys.stderr)
+    raise SystemExit(code)
+
+
+def rgba(rgb, alpha=1.0):
+    return (*rgb, alpha)
+
+
+def make_material(bpy, name, color, *, metallic=0.0, roughness=0.45, emission=None, emission_strength=0.0):
+    material = bpy.data.materials.get(name) or bpy.data.materials.new(name)
+    material.use_nodes = True
+    material.diffuse_color = rgba(color)
+    shader = material.node_tree.nodes.get("Principled BSDF")
+    shader.inputs["Base Color"].default_value = rgba(color)
+    shader.inputs["Metallic"].default_value = metallic
+    shader.inputs["Roughness"].default_value = roughness
+    if emission is not None:
+        emission_input = shader.inputs.get("Emission Color") or shader.inputs.get("Emission")
+        if emission_input:
+            emission_input.default_value = rgba(emission)
+        strength_input = shader.inputs.get("Emission Strength")
+        if strength_input:
+            strength_input.default_value = emission_strength
+    return material
+
+
+def build_materials(bpy):
+    return {
+        "clay_body": make_material(bpy, "CLAY BODY", (0.38, 0.42, 0.46), metallic=0.20, roughness=0.38),
+        "clay_structure": make_material(bpy, "CLAY STRUCTURE", (0.17, 0.21, 0.25), metallic=0.65, roughness=0.32),
+        "clay_dark": make_material(bpy, "CLAY DARK", (0.045, 0.055, 0.065), metallic=0.45, roughness=0.28),
+        "clay_mli": make_material(bpy, "CLAY MLI", (0.54, 0.56, 0.52), metallic=0.08, roughness=0.50),
+        "clay_white": make_material(bpy, "CLAY REFLECTOR", (0.62, 0.65, 0.67), metallic=0.18, roughness=0.34),
+        "clay_glass": make_material(bpy, "CLAY GLASS", (0.035, 0.10, 0.13), metallic=0.12, roughness=0.14, emission=(0.01, 0.05, 0.07), emission_strength=0.15),
+        "livery_body": make_material(bpy, "LIVERY BODY BLUE", (0.045, 0.16, 0.22), metallic=0.35, roughness=0.30),
+        "livery_structure": make_material(bpy, "LIVERY STRUCTURE", (0.13, 0.18, 0.22), metallic=0.78, roughness=0.24),
+        "livery_dark": make_material(bpy, "LIVERY GRAPHITE", (0.018, 0.025, 0.032), metallic=0.70, roughness=0.24),
+        "livery_mli": make_material(bpy, "LIVERY MLI GOLD", (0.58, 0.34, 0.10), metallic=0.30, roughness=0.35),
+        "livery_white": make_material(bpy, "LIVERY DISH WHITE", (0.78, 0.81, 0.79), metallic=0.15, roughness=0.28),
+        "livery_red": make_material(bpy, "LIVERY RESTRAINED RED", (0.52, 0.025, 0.018), metallic=0.22, roughness=0.28),
+        "livery_glass": make_material(bpy, "LIVERY GLASS", (0.008, 0.055, 0.085), metallic=0.20, roughness=0.10, emission=(0.005, 0.045, 0.09), emission_strength=0.20),
+    }
+
+
+def clear_scene(bpy):
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+
+
+def add_beveled_cube(bpy, name, location, dimensions, clay_material, livery_material, bevel=0.04, rotation=None):
+    bpy.ops.mesh.primitive_cube_add(location=location, rotation=rotation or (0.0, 0.0, 0.0))
+    obj = bpy.context.object
+    obj.name = name
+    obj.data.name = name + ".mesh"
+    obj.dimensions = dimensions
+    bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)
+    if bevel:
+        modifier = obj.modifiers.new("Structural edge softening", "BEVEL")
+        modifier.width = bevel
+        modifier.segments = 3
+    return assign_variants(obj, clay_material, livery_material)
+
+
+def add_cylinder(bpy, name, location, radius, depth, clay_material, livery_material, *, rotation=(0.0, 0.0, 0.0), vertices=32):
+    bpy.ops.mesh.primitive_cylinder_add(
+        vertices=vertices,
+        radius=radius,
+        depth=depth,
+        location=location,
+        rotation=rotation,
+    )
+    obj = bpy.context.object
+    obj.name = name
+    obj.data.name = name + ".mesh"
+    return assign_variants(obj, clay_material, livery_material)
+
+
+def add_cone(bpy, name, location, radius1, radius2, depth, clay_material, livery_material, *, rotation=(0.0, 0.0, 0.0)):
+    bpy.ops.mesh.primitive_cone_add(
+        vertices=24,
+        radius1=radius1,
+        radius2=radius2,
+        depth=depth,
+        location=location,
+        rotation=rotation,
+    )
+    obj = bpy.context.object
+    obj.name = name
+    obj.data.name = name + ".mesh"
+    return assign_variants(obj, clay_material, livery_material)
+
+
+def add_uv_sphere(bpy, name, location, radius, clay_material, livery_material):
+    bpy.ops.mesh.primitive_uv_sphere_add(segments=32, ring_count=16, radius=radius, location=location)
+    obj = bpy.context.object
+    obj.name = name
+    obj.data.name = name + ".mesh"
+    return assign_variants(obj, clay_material, livery_material)
+
+
+def add_torus(bpy, name, location, major_radius, minor_radius, clay_material, livery_material, *, rotation=(0.0, 0.0, 0.0)):
+    bpy.ops.mesh.primitive_torus_add(
+        major_radius=major_radius,
+        minor_radius=minor_radius,
+        major_segments=48,
+        minor_segments=10,
+        location=location,
+        rotation=rotation,
+    )
+    obj = bpy.context.object
+    obj.name = name
+    obj.data.name = name + ".mesh"
+    return assign_variants(obj, clay_material, livery_material)
+
+
+def add_between(bpy, name, start, end, radius, clay_material, livery_material, vertices=20):
+    start_vec = Vector(start)
+    end_vec = Vector(end)
+    delta = end_vec - start_vec
+    obj = add_cylinder(
+        bpy,
+        name,
+        (start_vec + end_vec) / 2.0,
+        radius,
+        delta.length,
+        clay_material,
+        livery_material,
+        vertices=vertices,
+    )
+    obj.rotation_euler = delta.to_track_quat("Z", "Y").to_euler()
+    return obj
+
+
+def add_dish(bpy, name, base_x, center_y, center_z, radius, depth, clay_material, livery_material):
+    """Create a shallow open paraboloid whose boresight points along +X."""
+    segments = 64
+    rings = 9
+    vertices = [(base_x, center_y, center_z)]
+    for ring in range(1, rings + 1):
+        fraction = ring / rings
+        ring_radius = radius * fraction
+        ring_x = base_x + depth * fraction * fraction
+        for segment in range(segments):
+            angle = 2.0 * math.pi * segment / segments
+            vertices.append(
+                (
+                    ring_x,
+                    center_y + ring_radius * math.cos(angle),
+                    center_z + ring_radius * math.sin(angle),
+                )
+            )
+    faces = []
+    for segment in range(segments):
+        faces.append((0, 1 + segment, 1 + (segment + 1) % segments))
+    for ring in range(1, rings):
+        first = 1 + (ring - 1) * segments
+        next_first = first + segments
+        for segment in range(segments):
+            current = first + segment
+            following = first + (segment + 1) % segments
+            next_current = next_first + segment
+            next_following = next_first + (segment + 1) % segments
+            faces.append((current, next_current, next_following, following))
+    mesh = bpy.data.meshes.new(name + ".mesh")
+    mesh.from_pydata(vertices, [], faces)
+    mesh.update()
+    obj = bpy.data.objects.new(name, mesh)
+    bpy.context.collection.objects.link(obj)
+    assign_variants(obj, clay_material, livery_material)
+    solidify = obj.modifiers.new("Reflector thickness", "SOLIDIFY")
+    solidify.thickness = 0.012
+    return obj
+
+
+def assign_variants(obj, clay_material, livery_material):
+    obj["object_id"] = obj.name
+    obj["clay_material"] = clay_material.name
+    obj["livery_material"] = livery_material.name
+    obj.data.materials.clear()
+    obj.data.materials.append(clay_material)
+    return obj
+
+
+def apply_material_mode(bpy, materials, mode):
+    if mode not in {"clay", "livery"}:
+        raise ValueError(f"unknown material mode: {mode}")
+    for obj in bpy.context.scene.objects:
+        material_name = obj.get(f"{mode}_material")
+        if not material_name or not obj.data or not hasattr(obj.data, "materials"):
+            continue
+        material = bpy.data.materials.get(material_name)
+        if material is None:
+            raise RuntimeError(f"missing material {material_name!r} for {obj.name}")
+        obj.data.materials.clear()
+        obj.data.materials.append(material)
+
+
+def build_geometry(bpy, materials, step_id):
+    """Build every object of the cumulative step, in STEP_OBJECTS order.
+
+    Stage sources (legacy build_probe.py):
+        probe-01-bus         :364-390, :401-404
+        probe-02-boom        :406-410, :418-433
+        probe-03-rtg         :411-416
+        probe-04-hga         :392-399
+        probe-05-instruments :437-442
+        probe-06-mast        :436, :443-444
+        probe-07-livery      :450-473 (livery material mode over the full model)
+    """
+    clay_body = materials["clay_body"]
+    clay_structure = materials["clay_structure"]
+    clay_dark = materials["clay_dark"]
+    clay_mli = materials["clay_mli"]
+    clay_white = materials["clay_white"]
+    clay_glass = materials["clay_glass"]
+    livery_body = materials["livery_body"]
+    livery_structure = materials["livery_structure"]
+    livery_dark = materials["livery_dark"]
+    livery_mli = materials["livery_mli"]
+    livery_white = materials["livery_white"]
+    livery_red = materials["livery_red"]
+    livery_glass = materials["livery_glass"]
+
+    objects = {}
+    bay_panel_livery = {}
+    for index in range(10):
+        bay_panel_livery[f"probe.bus.bay.panel.{index:02d}"] = livery_red if index in {1, 6} else livery_structure
+
+    for object_id in STEP_OBJECTS[step_id]:
+        if object_id == "probe.bus.electronics.decagon":
+            objects[object_id] = add_cylinder(bpy, object_id, (0.0, 0.0, 0.0), 0.45, 0.48, clay_body, livery_body, rotation=(0.0, math.pi / 2.0, 0.0), vertices=10)
+        elif object_id == "probe.bus.ring.front":
+            objects[object_id] = add_torus(bpy, object_id, (0.25, 0.0, 0.0), 0.41, 0.025, clay_structure, livery_structure, rotation=(0.0, math.pi / 2.0, 0.0))
+        elif object_id == "probe.bus.ring.rear":
+            objects[object_id] = add_torus(bpy, object_id, (-0.25, 0.0, 0.0), 0.41, 0.025, clay_structure, livery_structure, rotation=(0.0, math.pi / 2.0, 0.0))
+        elif object_id.startswith("probe.bus.bay.panel."):
+            index = int(object_id.rsplit(".", 1)[-1])
+            angle = 2.0 * math.pi * index / 10.0
+            y = 0.46 * math.cos(angle)
+            z = 0.46 * math.sin(angle)
+            objects[object_id] = add_beveled_cube(bpy, object_id, (-0.01, y, z), (0.36, 0.055, 0.18), clay_structure, bay_panel_livery[object_id], bevel=0.018, rotation=(angle, 0.0, 0.0))
+        elif object_id == "probe.bus.mli.top":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (-0.02, 0.0, 0.465), (0.34, 0.56, 0.055), clay_mli, livery_mli, bevel=0.012)
+        elif object_id == "probe.bus.mli.bottom":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (-0.02, 0.0, -0.465), (0.34, 0.56, 0.055), clay_mli, livery_mli, bevel=0.012)
+        elif object_id == "probe.bus.radiator.port":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (-0.05, -0.47, 0.0), (0.28, 0.045, 0.34), clay_dark, livery_dark, bevel=0.012)
+        elif object_id == "probe.bus.radiator.starboard":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (-0.05, 0.47, 0.0), (0.28, 0.045, 0.34), clay_dark, livery_dark, bevel=0.012)
+        elif object_id == "probe.aacs":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (-0.28, 0.0, 0.18), (0.08, 0.22, 0.18), clay_dark, livery_dark, bevel=0.018)
+        elif object_id.startswith("probe.thruster."):
+            index = int(object_id.rsplit(".", 1)[-1])
+            y, z = ((-0.30, -0.25), (-0.30, 0.25), (0.30, -0.25), (0.30, 0.25))[index - 1]
+            objects[object_id] = add_cone(bpy, object_id, (-0.28, y, z), 0.045, 0.018, 0.10, clay_dark, livery_dark, rotation=(0.0, math.pi / 2.0, 0.0))
+        elif object_id == "probe.rtg.boom":
+            objects[object_id] = add_between(bpy, object_id, (-0.12, -0.42, -0.16), (-0.12, -1.85, -0.16), 0.028, clay_structure, livery_structure)
+        elif object_id == "probe.mag.boom":
+            objects[object_id] = add_between(bpy, object_id, (0.0, 0.18, 0.18), (0.0, 6.50, 0.18), 0.022, clay_structure, livery_structure)
+        elif object_id == "probe.mag.head":
+            objects[object_id] = add_cylinder(bpy, object_id, (0.0, 6.56, 0.18), 0.10, 0.20, clay_dark, livery_dark, rotation=(math.pi / 2.0, 0.0, 0.0))
+        elif object_id == "probe.mag.sensor.a":
+            objects[object_id] = add_uv_sphere(bpy, object_id, (0.0, 6.68, 0.25), 0.045, clay_glass, livery_glass)
+        elif object_id == "probe.mag.sensor.b":
+            objects[object_id] = add_uv_sphere(bpy, object_id, (0.0, 6.68, 0.11), 0.045, clay_glass, livery_glass)
+        elif object_id == "probe.pws.antenna.left":
+            objects[object_id] = add_between(bpy, object_id, (-0.12, 0.0, 0.28), (-0.12, -2.50, 1.10), 0.012, clay_structure, livery_structure, vertices=12)
+        elif object_id == "probe.pws.antenna.right":
+            objects[object_id] = add_between(bpy, object_id, (-0.12, 0.0, 0.28), (-0.12, 2.50, 1.10), 0.012, clay_structure, livery_structure, vertices=12)
+        elif object_id == "probe.pws.tip.left":
+            objects[object_id] = add_uv_sphere(bpy, object_id, (-0.12, -2.50, 1.10), 0.035, clay_structure, livery_red)
+        elif object_id == "probe.pws.tip.right":
+            objects[object_id] = add_uv_sphere(bpy, object_id, (-0.12, 2.50, 1.10), 0.035, clay_structure, livery_red)
+        elif object_id.startswith("probe.rtg.") and object_id.endswith(tuple(f".fin.{i:02d}" for i in range(3))):
+            rtg_part, fin_part = object_id.rsplit(".fin.", 1)
+            rtg_index = int(rtg_part.rsplit(".", 1)[-1])
+            fin_index = int(fin_part)
+            y = (-0.80, -1.22, -1.64)[rtg_index - 1] - 0.09 + fin_index * 0.09
+            objects[object_id] = add_torus(bpy, object_id, (-0.12, y, -0.16), 0.112, 0.015, clay_structure, livery_structure, rotation=(math.pi / 2.0, 0.0, 0.0))
+        elif object_id.startswith("probe.rtg."):
+            index = int(object_id.rsplit(".", 1)[-1])
+            y = (-0.80, -1.22, -1.64)[index - 1]
+            objects[object_id] = add_cylinder(bpy, object_id, (-0.12, y, -0.16), 0.105, 0.27, clay_dark, livery_dark, rotation=(math.pi / 2.0, 0.0, 0.0))
+        elif object_id == "probe.hga.reflector":
+            objects[object_id] = add_dish(bpy, object_id, 0.30, 0.0, 0.0, 0.925, 0.14, clay_white, livery_white)
+        elif object_id == "probe.hga.feed":
+            objects[object_id] = add_cylinder(bpy, object_id, (0.95, 0.0, 0.0), 0.075, 0.12, clay_glass, livery_glass, rotation=(0.0, math.pi / 2.0, 0.0))
+        elif object_id.startswith("probe.hga.strut."):
+            index = int(object_id.rsplit(".", 1)[-1])
+            point = ((0.41, -0.60, -0.60), (0.41, -0.60, 0.60), (0.41, 0.60, -0.60), (0.41, 0.60, 0.60))[index]
+            objects[object_id] = add_between(bpy, object_id, point, (0.95, 0.0, 0.0), 0.018, clay_structure, livery_structure, vertices=12)
+        elif object_id == "probe.scan.pivot":
+            objects[object_id] = add_cylinder(bpy, object_id, (0.0, 0.0, 1.53), 0.11, 0.12, clay_dark, livery_dark)
+        elif object_id == "probe.scan.platform":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (0.0, 0.0, 1.60), (0.32, 0.48, 0.12), clay_body, livery_body, bevel=0.025)
+        elif object_id == "probe.crs":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (0.15, 0.0, 1.76), (0.18, 0.18, 0.15), clay_dark, livery_dark, bevel=0.02)
+        elif object_id == "probe.plasma":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (-0.15, 0.0, 1.76), (0.18, 0.18, 0.15), clay_dark, livery_dark, bevel=0.02)
+        elif object_id == "probe.optical":
+            objects[object_id] = add_beveled_cube(bpy, object_id, (0.0, -0.16, 1.76), (0.20, 0.12, 0.15), clay_body, livery_body, bevel=0.018)
+        elif object_id == "probe.optical.aperture":
+            objects[object_id] = add_cylinder(bpy, object_id, (0.11, -0.16, 1.76), 0.045, 0.035, clay_glass, livery_glass, rotation=(0.0, math.pi / 2.0, 0.0))
+        elif object_id == "probe.science.boom":
+            objects[object_id] = add_between(bpy, object_id, (0.0, 0.0, 0.34), (0.0, 0.0, 1.50), 0.035, clay_structure, livery_structure)
+        else:
+            fail("unknown object id: " + object_id, 4)
+
+    ordered = [objects[object_id] for object_id in STEP_OBJECTS[step_id]]
+    for obj, object_id in zip(ordered, STEP_OBJECTS[step_id]):
+        if obj.get("object_id") != object_id:
+            fail("source object custom property verification failed", 4)
+    return ordered
+
+
+def add_render_setup(bpy):
+    from mathutils import Vector
+
+    scene = bpy.context.scene
+    scene.render.resolution_x = 512
+    scene.render.resolution_y = 512
+    scene.render.resolution_percentage = 100
+    scene.render.image_settings.file_format = "PNG"
+    if scene.world is None:
+        scene.world = bpy.data.worlds.new("probe.world")
+    scene.world.color = (0.025, 0.035, 0.045)
+
+    camera_data = bpy.data.cameras.new("probe.camera")
+    camera_data.type = "ORTHO"
+    camera_data.ortho_scale = 15.0
+    camera = bpy.data.objects.new("probe.camera", camera_data)
+    bpy.context.collection.objects.link(camera)
+    camera.location = (8.2, -12.5, 6.3)
+    camera.rotation_euler = (Vector((0.0, 2.0, 0.2)) - camera.location).to_track_quat("-Z", "Y").to_euler()
+    scene.camera = camera
+
+    light_data = bpy.data.lights.new("probe.key", type="AREA")
+    light_data.energy = 900
+    light_data.shape = "DISK"
+    light_data.size = 5.0
+    light = bpy.data.objects.new("probe.key", light_data)
+    bpy.context.collection.objects.link(light)
+    light.location = (4.0, -4.0, 8.0)
+    light.rotation_euler = (Vector((0.0, 2.0, 0.2)) - light.location).to_track_quat("-Z", "Y").to_euler()
+
+
+def export_glb(bpy, objects, output):
+    for obj in bpy.context.selected_objects:
+        obj.select_set(False)
+    for obj in objects:
+        obj.select_set(True)
+    bpy.context.view_layer.objects.active = objects[-1]
+    result = bpy.ops.export_scene.gltf(filepath=output, export_format="GLB", use_selection=True, export_apply=True)
+    if "FINISHED" not in result or not os.path.isfile(output) or os.path.getsize(output) <= 0:
+        fail("GLB export failed", 4)
+
+
+def write_result(path, response):
+    path = os.path.abspath(path)
+    os.makedirs(os.path.dirname(path), exist_ok=True)
+    temporary_path = path + ".tmp"
+    with open(temporary_path, "w", encoding="utf-8") as stream:
+        json.dump(response, stream, separators=(",", ":"))
+        stream.flush()
+        os.fsync(stream.fileno())
+    os.replace(temporary_path, path)
+
+
+def verify_reimport(bpy, output, expected):
+    clear_scene(bpy)
+    result = bpy.ops.import_scene.gltf(filepath=output)
+    if "FINISHED" not in result:
+        fail("GLB reimport failed", 4)
+
+    names = [obj.name for obj in bpy.context.scene.objects if obj.type == "MESH"]
+    if len(names) != len(expected) or set(names) != set(expected):
+        fail("GLB reimport object IDs did not match", 4)
+
+    return [object_id for object_id in expected if object_id in names]
+
+
+def main():
+    parser = argparse.ArgumentParser(add_help=False)
+    parser.add_argument("--step-id", required=True)
+    parser.add_argument("--output", required=True)
+    parser.add_argument("--render-output")
+    parser.add_argument("--result-output", required=True)
+    args = parser.parse_args()
+
+    if args.step_id not in STEP_OBJECTS:
+        fail("unknown step id", 2)
+    if bool(args.render_output) and os.path.abspath(args.render_output) == os.path.abspath(args.output):
+        fail("render output must differ from GLB output", 2)
+
+    try:
+        import bpy
+    except Exception as exc:
+        fail("bpy is unavailable: " + str(exc), 3)
+
+    if tuple(bpy.app.version) < (3, 0, 0):
+        fail("bpy version is unsupported", 3)
+
+    output = os.path.abspath(args.output)
+    result_output = os.path.abspath(args.result_output)
+    os.makedirs(os.path.dirname(output), exist_ok=True)
+
+    try:
+        clear_scene(bpy)
+        materials = build_materials(bpy)
+        objects = build_geometry(bpy, materials, args.step_id)
+        apply_material_mode(bpy, materials, "livery" if args.step_id in LIVERY_STEPS else "clay")
+        export_glb(bpy, objects, output)
+        exported_at = utc_now()
+        glb_bytes = os.path.getsize(output)
+
+        rendered_at = None
+        if args.render_output:
+            render_output = os.path.abspath(args.render_output)
+            os.makedirs(os.path.dirname(render_output), exist_ok=True)
+            add_render_setup(bpy)
+            bpy.context.scene.render.filepath = render_output
+            result = bpy.ops.render.render(write_still=True)
+            if "FINISHED" not in result or not os.path.isfile(render_output) or os.path.getsize(render_output) <= 0:
+                fail("PNG render failed", 4)
+            rendered_at = utc_now()
+
+        verified = verify_reimport(bpy, output, STEP_OBJECTS[args.step_id])
+        response = {
+            "ok": True,
+            "blenderVersion": ".".join(str(part) for part in bpy.app.version),
+            "exportedAt": exported_at,
+            "objectIds": STEP_OBJECTS[args.step_id],
+            "verifiedObjectIds": verified,
+            "glbBytes": glb_bytes,
+        }
+        if args.render_output:
+            response["renderPath"] = os.path.abspath(args.render_output)
+            response["renderedAt"] = rendered_at
+        write_result(result_output, response)
+        print("probe result written: " + result_output)
+    except SystemExit:
+        raise
+    except Exception as exc:
+        fail("probe failed: " + str(exc), 4)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/SomhairlesDream.Cli.Tests/ArgumentsTests.fs b/tests/SomhairlesDream.Cli.Tests/ArgumentsTests.fs
index f55762e..38c8741 100644
--- a/tests/SomhairlesDream.Cli.Tests/ArgumentsTests.fs
+++ b/tests/SomhairlesDream.Cli.Tests/ArgumentsTests.fs
@@ -60,6 +60,33 @@ let ``run command parses explicit ids and render flag`` () =
     | Help -> failwith "expected run command"
 
 [<Fact>]
+let ``run command with probe design applies probe defaults`` () =
+    match Arguments.parse [| "run"; "--design"; "probe" |] |> expectOk with
+    | Run options ->
+        Assert.Equal("probe-001", options.Ids.ProjectId)
+        Assert.Equal("run-001", options.Ids.RunId)
+        Assert.Equal("probe-base-000", options.Ids.BaseId)
+        Assert.Equal("probe-target-007", options.Ids.TargetId)
+        Assert.Equal("probe", options.Design)
+    | Verify _
+    | Help -> failwith "expected run command"
+
+[<Fact>]
+let ``run command with probe design keeps explicit ids`` () =
+    match Arguments.parse [| "run"; "--design"; "probe"; "--run-id"; "run-x" |] |> expectOk with
+    | Run options ->
+        Assert.Equal("probe-001", options.Ids.ProjectId)
+        Assert.Equal("run-x", options.Ids.RunId)
+        Assert.Equal("probe-base-000", options.Ids.BaseId)
+    | Verify _
+    | Help -> failwith "expected run command"
+
+[<Fact>]
+let ``run command rejects unknown design`` () =
+    match Arguments.parse [| "run"; "--design"; "steampunk" |] |> expectError with
+    | message -> Assert.Contains("invalid design", message)
+
+[<Fact>]
 let ``verify command requires exactly one manifest path`` () =
     match Arguments.parse [| "verify"; "run"; "extra" |] |> expectError with
     | message -> Assert.Contains("manifest", message)
diff --git a/tests/SomhairlesDream.Modeling.Tests/PipelineTests.fs b/tests/SomhairlesDream.Modeling.Tests/PipelineTests.fs
index 7a5e3e1..221e7d7 100644
--- a/tests/SomhairlesDream.Modeling.Tests/PipelineTests.fs
+++ b/tests/SomhairlesDream.Modeling.Tests/PipelineTests.fs
@@ -60,6 +60,7 @@ type private TestBridge(?wrongObjectIds: bool) =
 let private options root bridge =
     { PipelineOptions.ArtifactRoot = root
       Ids = ids
+      Steps = Design.steps
       Render = true
       Bridge = bridge
       Clock = fun () -> DateTimeOffset.Parse("2026-09-20T12:00:00Z")
@@ -89,6 +90,36 @@ let ``design steps expose the fixed ordered object contract`` () =
            "heritage.crossbeam" |] = steps[2].ObjectIds)
 
 [<Fact>]
+let ``probe design steps expose the cumulative real-probe contract`` () =
+    let steps = Design.probeSteps
+
+    Assert.Equal(7, steps.Length)
+    Assert.True([| "probe-01-bus"; "probe-02-boom"; "probe-03-rtg"; "probe-04-hga"; "probe-05-instruments"; "probe-06-mast"; "probe-07-livery" |] = (steps |> Array.map _.StepId))
+    Assert.True([| 0; 1; 2; 3; 4; 5; 6 |] = (steps |> Array.map _.Index))
+    Assert.Equal(22, steps[0].ObjectIds.Length)
+    Assert.Equal(31, steps[1].ObjectIds.Length)
+    Assert.Equal(43, steps[2].ObjectIds.Length)
+    Assert.Equal(49, steps[3].ObjectIds.Length)
+    Assert.Equal(55, steps[4].ObjectIds.Length)
+    Assert.Equal(56, steps[5].ObjectIds.Length)
+    Assert.Equal(56, steps[6].ObjectIds.Length)
+    Assert.True(steps[0].ObjectIds |> Array.contains "probe.bus.electronics.decagon")
+    Assert.True(steps[0].ObjectIds |> Array.contains "probe.bus.bay.panel.00")
+    Assert.True(steps[2].ObjectIds |> Array.contains "probe.rtg.01.fin.02")
+    Assert.True(steps[3].ObjectIds |> Array.contains "probe.hga.reflector")
+    Assert.True(steps[4].ObjectIds |> Array.contains "probe.optical.aperture")
+    Assert.True([| "probe.science.boom" |] = (steps[5].ObjectIds |> Array.except steps[4].ObjectIds))
+    Assert.True([||] = (steps[6].ObjectIds |> Array.except steps[5].ObjectIds))
+    Assert.Equal(6, steps[6].Changes.Length)
+    Assert.True(steps[6].Changes |> Array.forall (fun change -> change.Kind = "update"))
+
+[<Fact>]
+let ``design forProject selects steps by project id prefix`` () =
+    Assert.True(Design.steps = Design.forProject "heritage-001")
+    Assert.True(Design.probeSteps = Design.forProject "probe-001")
+    Assert.True(Design.probeSteps = Design.forProject "probe-42")
+
+[<Fact>]
 let ``pipeline commits each step and writes manifest after complete event`` () =
     withTempDirectory (fun root ->
         let manifest = Pipeline.run (options root (TestBridge() :> IArtifactBridge)) |> expectOk