2 files changed, 89 insertions, 2 deletions
diff --git a/src/SomhairlesDream.Modeling/BlenderBridge.fs b/src/SomhairlesDream.Modeling/BlenderBridge.fs
index c4215ae..0f605b0 100644
--- a/src/SomhairlesDream.Modeling/BlenderBridge.fs
+++ b/src/SomhairlesDream.Modeling/BlenderBridge.fs
@@ -102,7 +102,10 @@ type BlenderProcessBridge(python: string, stageRoot: string, ?timeout: TimeSpan)
         File.WriteAllText(path, content)
 
     member private _.ScriptPath(stepId: string) =
-        let scriptName = if stepId.StartsWith("probe-") then "probe.py" else "fixture.py"
+        let scriptName =
+            if stepId.StartsWith("probe-") then "probe.py"
+            elif stepId.StartsWith("ship-") then "ship.py"
+            else "fixture.py"
 
         Path.GetFullPath(Path.Combine(stageRoot, "blender", scriptName))
 
diff --git a/src/SomhairlesDream.Modeling/Definitions.fs b/src/SomhairlesDream.Modeling/Definitions.fs
index 9a9256e..e1d2739 100644
--- a/src/SomhairlesDream.Modeling/Definitions.fs
+++ b/src/SomhairlesDream.Modeling/Definitions.fs
@@ -92,5 +92,89 @@ module Design =
              ObjectIds = prior (prior (prior (prior (prior (prior bus booms) rtgs) hga) instruments) mast) [||]
              Changes = liveryChanges } |]
 
+    // HNX-01 crewed interstellar starship (Concept A "Keel"): fusion-torch
+    // study with a spin-gravity habitat torus, water-shadow radiation
+    // shield and an axial keel separating crew from the reactor section.
+    // Display-scale visual research; no mass/thrust/shielding closure is
+    // claimed — the ship.py module header lists the deliberately open
+    // engineering problems.
+    let shipSteps : DesignStep array =
+        let keel =
+            [| "starship.keel.spine"; "starship.nose.cone"; "starship.dock.ring" |]
+        let hab =
+            [| "starship.hab.torus"; "starship.hub.core"
+               "starship.spoke.00"; "starship.spoke.01"; "starship.spoke.02"
+               "starship.spoke.03"; "starship.spoke.04"; "starship.spoke.05" |]
+        let radiation =
+            [| "starship.shadow.collar"; "starship.storm.cellar" |]
+        let reactor =
+            [| "starship.core.pressure"; "starship.core.shield.plug"
+               "starship.nozzle.magnetic"
+               "starship.radiator.00"; "starship.radiator.01"; "starship.radiator.02"
+               "starship.radiator.03"; "starship.radiator.04"; "starship.radiator.05" |]
+        let power =
+            [| "starship.power.truss"; "starship.capacitor.ring"
+               "starship.comm.dish"; "starship.comm.feed" |]
+        let cabin =
+            [| "starship.window.00"; "starship.window.01"; "starship.window.02"
+               "starship.window.03"
+               "starship.airlock.ring"; "starship.airlock.tunnel"
+               "starship.cargo.pod.00"; "starship.cargo.pod.01" |]
+        let prior (prefix: string array) (current: string array) =
+            Array.append prefix current
+
+        let keelChanges =
+            [| { ObjectId = "starship.keel.spine"; Kind = "add"; Summary = "Add axial keel spine from bow to nozzle bay" }
+               { ObjectId = "starship.nose.cone"; Kind = "add"; Summary = "Add forward nose cone" }
+               { ObjectId = "starship.dock.ring"; Kind = "add"; Summary = "Add forward docking ring" } |]
+        let habChanges =
+            Array.append
+                [| { ObjectId = "starship.hab.torus"; Kind = "add"; Summary = "Add rotating spin-gravity habitat torus" }
+                   { ObjectId = "starship.hub.core"; Kind = "add"; Summary = "Add zero-g hub with bearing core" } |]
+                (Array.init 6 (fun index ->
+                    { ObjectId = sprintf "starship.spoke.%02d" index; Kind = "add"; Summary = "Add pressurized transfer spoke" }))
+        let radiationChanges =
+            [| { ObjectId = "starship.shadow.collar"; Kind = "add"; Summary = "Add water-shadow radiation collar" }
+               { ObjectId = "starship.storm.cellar"; Kind = "add"; Summary = "Add storm cellar shelter volume" } |]
+        let reactorChanges =
+            Array.append
+                [| { ObjectId = "starship.core.pressure"; Kind = "add"; Summary = "Add fusion core pressure vessel" }
+                   { ObjectId = "starship.core.shield.plug"; Kind = "add"; Summary = "Add reactor shield plug" }
+                   { ObjectId = "starship.nozzle.magnetic"; Kind = "add"; Summary = "Add magnetic exhaust nozzle" } |]
+                (Array.init 6 (fun index ->
+                    { ObjectId = sprintf "starship.radiator.%02d" index; Kind = "add"; Summary = "Add waste-heat radiator panel" }))
+        let powerChanges =
+            [| { ObjectId = "starship.power.truss"; Kind = "add"; Summary = "Add power conditioning truss" }
+               { ObjectId = "starship.capacitor.ring"; Kind = "add"; Summary = "Add pulsed-power capacitor hoop" }
+               { ObjectId = "starship.comm.dish"; Kind = "add"; Summary = "Add high-gain communication dish" }
+               { ObjectId = "starship.comm.feed"; Kind = "add"; Summary = "Add communication feed horn" } |]
+        let cabinChanges =
+            Array.append
+                (Array.init 4 (fun index ->
+                    { ObjectId = sprintf "starship.window.%02d" index; Kind = "add"; Summary = "Add habitat observation window" }))
+                [| { ObjectId = "starship.airlock.ring"; Kind = "add"; Summary = "Add forward airlock ring" }
+                   { ObjectId = "starship.airlock.tunnel"; Kind = "add"; Summary = "Add pressurized airlock tunnel" }
+                   { ObjectId = "starship.cargo.pod.00"; Kind = "add"; Summary = "Add port cargo pod" }
+                   { ObjectId = "starship.cargo.pod.01"; Kind = "add"; Summary = "Add starboard cargo pod" } |]
+        let liveryChanges =
+            [| { ObjectId = "starship.keel.spine"; Kind = "update"; Summary = "Livery pass: bone-white hull structure" }
+               { ObjectId = "starship.hab.torus"; Kind = "update"; Summary = "Livery pass: habitat ring bone finish" }
+               { ObjectId = "starship.shadow.collar"; Kind = "update"; Summary = "Livery pass: ceramic shield darkening" }
+               { ObjectId = "starship.storm.cellar"; Kind = "update"; Summary = "Livery pass: ceramic cellar finish" }
+               { ObjectId = "starship.dock.ring"; Kind = "update"; Summary = "Livery pass: amber accent on dock ring" }
+               { ObjectId = "starship.capacitor.ring"; Kind = "update"; Summary = "Livery pass: amber capacitor hoop" }
+               { ObjectId = "starship.window.00"; Kind = "update"; Summary = "Livery pass: glass glazing" }
+               { ObjectId = "starship.nozzle.magnetic"; Kind = "update"; Summary = "Livery pass: nozzle coil graphite" } |]
+
+        [| { StepId = "ship-01-keel"; Index = 0; ObjectIds = keel; Changes = keelChanges }
+           { StepId = "ship-02-hab"; Index = 1; ObjectIds = Array.append keel hab; Changes = habChanges }
+           { StepId = "ship-03-radiation"; Index = 2; ObjectIds = Array.append (Array.append keel hab) radiation; Changes = radiationChanges }
+           { StepId = "ship-04-reactor"; Index = 3; ObjectIds = Array.append (Array.append (Array.append keel hab) radiation) reactor; Changes = reactorChanges }
+           { StepId = "ship-05-power"; Index = 4; ObjectIds = Array.append (Array.append (Array.append (Array.append keel hab) radiation) reactor) power; Changes = powerChanges }
+           { StepId = "ship-06-cabin"; Index = 5; ObjectIds = Array.append (Array.append (Array.append (Array.append (Array.append keel hab) radiation) reactor) power) cabin; Changes = cabinChanges }
+           { StepId = "ship-07-livery"; Index = 6; ObjectIds = Array.append (Array.append (Array.append (Array.append (Array.append (Array.append keel hab) radiation) reactor) power) cabin) [||]; Changes = liveryChanges } |]
+
     let forProject (projectId: string) : DesignStep array =
-        if projectId.StartsWith("probe-") then probeSteps else steps
+        if projectId.StartsWith("probe-") then probeSteps
+        elif projectId.StartsWith("ship-") then shipSteps
+        else steps