wip

Cargo.lock

@@ -199,6 +199,9 @@ name = "color"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2ec7c5eb7a16992b1904d76c517d170ab353b0e0b3d5a0c81a8a0cd1037893cf"
+dependencies = [
+ "serde",
+]
 
 [[package]]
 name = "compact_str"

kiln-core/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-color = "0.3.3"
+color = { version = "0.3.3", features = ["serde"] }
 doryen-fov = "0.1"
 rhai = "1"
 serde = { version = "1", features = ["derive"] }

kiln-core/src/api/object_info.rs

@@ -28,7 +28,7 @@ use crate::Direction;
 use crate::action::BoardAction;
 use crate::object_def::ObjectDef;
 use crate::script::Registerable;
-use crate::utils::{LogSink, ObjectId};
+use crate::utils::{Behavior, LogSink, ObjectId};
 
 /// A snapshot of one board object, returned by `Board.tagged`, `Board.named`,
 /// and `Board.get`. Passed by value — scripts read fields, not a live reference.
@@ -116,7 +116,7 @@ impl Registerable for ObjectInfo {
         // me.light: the object's current emitted light radius in cells (0 = none).
         engine.register_get("light", |o: &mut ObjectInfo| -> i64 {
             match o.board.borrow().objects.get(&o.id) {
-                Some(ObjectDef { light, .. }) => *light as i64,
+                Some(ObjectDef { behavior: Behavior { glow, .. }, .. }) => *glow as i64,
                 None => 0,
             }
         });

kiln-core/src/api/queue.rs

@@ -11,7 +11,7 @@ use crate::script::Registerable;
 use crate::utils::{LogSink, ObjectId};
 
 /// A single object's output queue.
-#[derive(Clone)]
+#[derive(Clone, Default)]
 pub struct ObjQueue(Rc<RefCell<VecDeque<Action>>>);
 
 impl ObjQueue {

kiln-core/src/archetype.rs

@@ -2,6 +2,8 @@ use crate::glyph::Glyph;
 use crate::utils::{Behavior, Pushable};
 use color::Rgba8;
 use crate::keys::KeyType;
+use serde::{Serialize, Deserialize};
+use crate::tile::EnterResponse;
 
 /// Declares the set of script-backed archetype families.
 ///
@@ -40,7 +42,7 @@ macro_rules! builtins {
         ///
         /// Add one entry to the `builtins!` invocation in `archetype.rs` and write
         /// `kiln-core/src/scripts/<name>.rhai`. No other files need to change.
-        #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+        #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
         pub enum Builtin {
             $( $variant ),+
         }
@@ -49,7 +51,7 @@ macro_rules! builtins {
             /// Returns `(family_variant, matched_alias)` for `name`, or `None` if `name`
             /// is not a known builtin keyword. The returned `&'static str` is the exact
             /// literal from the macro (always valid for a `Archetype::Builtin` field).
-            pub(crate) fn from_name(name: &str) -> Option<(Self, &'static str)> {
+            pub fn from_name(name: &str) -> Option<(Self, &'static str)> {
                 match name {
                     $(
                         $( $name => Some((Builtin::$variant, $name)), )+
@@ -59,7 +61,7 @@ macro_rules! builtins {
             }
 
             /// Returns the uniform behavior shared by all aliases in this family.
-            pub(crate) fn behavior(self) -> Behavior {
+            pub fn behavior(self) -> Behavior {
                 match self {
                     $( Builtin::$variant => $behavior, )+
                 }
@@ -69,7 +71,7 @@ macro_rules! builtins {
             /// so aliases within a family can differ in color (e.g. colored keys).
             /// Falls back to a transparent glyph for unrecognized aliases (shouldn't
             /// happen in practice since aliases are all from the macro).
-            pub(crate) fn default_glyph_for(self, alias: &str) -> Glyph {
+            pub fn default_glyph_for(self, alias: &str) -> Glyph {
                 match alias {
                     $(
                         $( $name => $glyph, )+
@@ -79,7 +81,7 @@ macro_rules! builtins {
             }
 
             /// Returns the embedded Rhai source shared by all aliases in this family.
-            pub(crate) fn script(self) -> &'static str {
+            pub fn script(self) -> &'static str {
                 match self {
                     $( Builtin::$variant => $script, )+
                 }
@@ -100,11 +102,11 @@ const fn g(tile: u32, r: u8, gr: u8, b: u8) -> Glyph {
 
 builtins! {
     Gem => ["gem" => g(4, 0x50, 0x50, 0xFF)] {
-        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::Any, grab: true },
+        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::Any, grab: true, glow: 0 },
         script: include_str!("scripts/gem.rhai"),
     },
     Heart => ["heart" => g(3, 0xCC, 0x22, 0x22)] {
-        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::Any, grab: true },
+        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::Any, grab: true, glow: 0 },
         script: include_str!("scripts/heart.rhai"),
     },
     Pusher => [
@@ -113,14 +115,14 @@ builtins! {
         "pusher_east"  => g(16, 0xAA, 0xAA, 0xAA),
         "pusher_west"  => g(17, 0xAA, 0xAA, 0xAA),
     ] {
-        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::No, grab: false },
+        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::No, grab: false, glow: 0 },
         script: include_str!("scripts/pusher.rhai"),
     },
     Spinner => [
         "spinner_cw"  => g(47, 0xAA, 0xAA, 0xAA),
         "spinner_ccw" => g(92, 0xAA, 0xAA, 0xAA),
     ] {
-        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::No, grab: false },
+        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::No, grab: false, glow: 0 },
         script: include_str!("scripts/spinner.rhai"),
     },
     // Solid, see-through (opaque: false), unpushable teleporters. Each direction's
@@ -131,7 +133,7 @@ builtins! {
         "transporter_east"  => g(41,  0x55, 0xFF, 0xFF),   // ')'
         "transporter_west"  => g(40,  0x55, 0xFF, 0xFF),   // '('
     ] {
-        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::No, grab: false },
+        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::No, grab: false, glow: 0 },
         script: include_str!("scripts/transporter.rhai"),
     },
     Key => [ // TODO these should refer to the key colors in Keyring
@@ -144,9 +146,28 @@ builtins! {
         "key_yellow" => KeyType::Yellow.glyph(),
         "key_white"  => KeyType::White.glyph(),
     ] {
-        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::Any, grab: true },
+        behavior: Behavior { solid: true, opaque: false, pushable: Pushable::Any, grab: true, glow: 0 },
         script: include_str!("scripts/key.rhai"),
-    }
+    },
+    Wall => ["wall" => Glyph {
+            tile: 35,
+            fg: Rgba8 { r: 0x80, g: 0x80, b: 0x80, a: 255 },
+            bg: Rgba8 { r: 0x60, g: 0x60, b: 0x60, a: 255 }}] {
+        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::No, grab: false, glow: 0 },
+        script: ""
+    },
+    Crate => ["crate" => g(254, 0xaa, 0xaa, 0xaa)] { // CP437 ■ (small filled square)
+        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::Any, grab: false, glow: 0 },
+        script: ""
+    },
+    HCrate => ["hcrate" => g(29, 0xaa, 0xaa, 0xaa)] { // CP437 ↔ (left-right arrow) — pushable east/west
+        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::Horizontal, grab: false, glow: 0 },
+        script: ""
+    },
+    VCrate => ["vcrate" => g(18, 0xaa, 0xaa, 0xaa)] { // CP437 ↕ (up-down arrow) — pushable north/south
+        behavior: Behavior { solid: true, opaque: true, pushable: Pushable::Vertical, grab: false, glow: 0 },
+        script: ""
+    },
 }
 
 /// A class of board cell, encoding its default behavior and appearance.
@@ -171,22 +192,17 @@ builtins! {
 ///
 /// [`ObjectDef`]: crate::object_def::ObjectDef
 /// [`Board::expand_builtin_archetypes`]: crate::board::Board::expand_builtin_archetypes
-#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
 pub enum Archetype {
     /// An open cell; the player and other entities can pass through it.
     Empty,
-    /// A solid wall; impassable and opaque.
-    Wall,
-    /// A solid, pushable box. Walking into it shoves it one cell in the same
-    /// direction (cascading through a chain of crates) if there is open space.
-    Crate,
-    /// A crate that can only be pushed east/west (horizontal axis). Glyph ↔.
-    HCrate,
-    /// A crate that can only be pushed north/south (vertical axis). Glyph ↕.
-    VCrate,
     /// A wall-mounted torch: non-solid, non-opaque decorative terrain that emits
     /// warm light on a `dark` board (radius from [`Archetype::light`]). Glyph ☼.
     Torch,
+    /// Sentinel for map files that reference an unknown archetype name.
+    /// Renders as a yellow `?` on red to make the error visible in-game.
+    ErrorBlock,
     /// A script-backed archetype expanded from a map-file keyword.
     ///
     /// - `Builtin` is the family (e.g. `Builtin::Pusher`), which selects the
@@ -196,10 +212,8 @@ pub enum Archetype {
     ///   `BUILTIN_<alias>` tag on the expanded object.
     ///
     /// See [`Builtin`] and the [`builtins!`] invocation for the full registry.
+    #[serde(untagged)]
     Builtin(Builtin, &'static str),
-    /// Sentinel for map files that reference an unknown archetype name.
-    /// Renders as a yellow `?` on red to make the error visible in-game.
-    ErrorBlock,
 }
 
 impl Archetype {
@@ -212,30 +226,7 @@ impl Archetype {
                 opaque: false,
                 pushable: Pushable::No,
                 grab: false,
-            },
+                glow: 0,
-            Archetype::Wall => Behavior {
-                solid: true,
-                opaque: true,
-                pushable: Pushable::No,
-                grab: false,
-            },
-            Archetype::Crate => Behavior {
-                solid: true,
-                opaque: true,
-                pushable: Pushable::Any,
-                grab: false,
-            },
-            Archetype::HCrate => Behavior {
-                solid: true,
-                opaque: true,
-                pushable: Pushable::Horizontal,
-                grab: false,
-            },
-            Archetype::VCrate => Behavior {
-                solid: true,
-                opaque: true,
-                pushable: Pushable::Vertical,
-                grab: false,
             },
             // A torch you can walk past and see through; it only lights the room.
             Archetype::Torch => Behavior {
@@ -243,12 +234,14 @@ impl Archetype {
                 opaque: false,
                 pushable: Pushable::No,
                 grab: false,
+                glow: 6,
             },
             Archetype::ErrorBlock => Behavior {
                 solid: true,
                 opaque: true,
                 pushable: Pushable::No,
                 grab: false,
+                glow: 0,
             },
         }
     }
@@ -258,10 +251,6 @@ impl Archetype {
         match self {
             Archetype::Builtin(_, alias) => alias,
             Archetype::Empty => "empty",
-            Archetype::Wall => "wall",
-            Archetype::Crate => "crate",
-            Archetype::HCrate => "hcrate",
-            Archetype::VCrate => "vcrate",
             Archetype::Torch => "torch",
             Archetype::ErrorBlock => "error_block",
         }
@@ -292,26 +281,6 @@ impl Archetype {
                 fg: Rgba8 { r: 0, g: 0, b: 0, a: 255 },
                 bg: Rgba8 { r: 0, g: 0, b: 0, a: 255 },
             },
-            Archetype::Wall => Glyph {
-                tile: 35,
-                fg: Rgba8 { r: 0x80, g: 0x80, b: 0x80, a: 255 },
-                bg: Rgba8 { r: 0x60, g: 0x60, b: 0x60, a: 255 },
-            },
-            Archetype::Crate => Glyph {
-                tile: 254, // CP437 ■ (small filled square)
-                fg: Rgba8 { r: 0xAA, g: 0xAA, b: 0xAA, a: 255 },
-                bg: Rgba8 { r: 0, g: 0, b: 0, a: 255 },
-            },
-            Archetype::HCrate => Glyph {
-                tile: 29, // CP437 ↔ (left-right arrow) — pushable east/west
-                fg: Rgba8 { r: 0xAA, g: 0xAA, b: 0xAA, a: 255 },
-                bg: Rgba8 { r: 0, g: 0, b: 0, a: 255 },
-            },
-            Archetype::VCrate => Glyph {
-                tile: 18, // CP437 ↕ (up-down arrow) — pushable north/south
-                fg: Rgba8 { r: 0xAA, g: 0xAA, b: 0xAA, a: 255 },
-                bg: Rgba8 { r: 0, g: 0, b: 0, a: 255 },
-            },
             Archetype::Torch => Glyph {
                 tile: 15, // CP437 ☼ (sun) — a warm point of light
                 fg: Rgba8 { r: 0xFF, g: 0xB0, b: 0x40, a: 255 }, // warm amber (also its light color)
@@ -343,14 +312,17 @@ impl TryFrom<&str> for Archetype {
         }
         match name {
             "empty" => Ok(Archetype::Empty),
-            "wall" => Ok(Archetype::Wall),
-            "crate" => Ok(Archetype::Crate),
-            "hcrate" => Ok(Archetype::HCrate),
-            "vcrate" => Ok(Archetype::VCrate),
             "torch" => Ok(Archetype::Torch),
             // "object", "portal", "player" are intentionally absent: they are
             // meta-kinds handled by the layer builder, not Archetype variants.
-            _ => Err(format!("unknown archetype: {name}")),
+            _ => {
+                // is it a valid builtin?
+                if let Some((b, s)) = Builtin::from_name(name) {
+                    Ok(Archetype::Builtin(b, s))
+                } else {
+                    Err(format!("unknown archetype: {name}"))
+                }
+            },
         }
     }
 }
@@ -359,12 +331,6 @@ impl TryFrom<&str> for Archetype {
 mod tests {
     use super::Archetype;
 
-    #[test]
-    fn directional_crate_default_glyph_tiles() {
-        assert_eq!(Archetype::HCrate.default_glyph().tile, 29);
-        assert_eq!(Archetype::VCrate.default_glyph().tile, 18);
-    }
-
     #[test]
     fn builtin_names_glyphs_and_round_trip() {
         // All known aliases must parse, round-trip via name(), and give the right tile.

kiln-core/src/board.rs

@@ -5,8 +5,9 @@ use crate::glyph::Glyph;
 use crate::log::LogLine;
 use crate::object_def::ObjectDef;
 use crate::utils::Direction;
-use crate::utils::{Behavior, ObjectId, PlayerPos, PortalDef, Pushable, RegistryValue, Solid};
+use crate::utils::{ObjectId, PlayerPos, PortalDef, Pushable, RegistryValue, Solid};
 use std::collections::{BTreeMap, HashMap, HashSet};
+use crate::tile::{EnterResponse, Sensor};
 
 /// The result of [`Board::apply_shift`]: any error lines to log, plus the
 /// `(from, to)` cell relocations the shift actually performed.
@@ -84,6 +85,8 @@ pub struct Board {
     /// Non-solid things placed off the main grid, drawn only where the grid cell is
     /// empty (see [`Decoration`]). Normally empty; populated by save files.
     pub(crate) decorations: Vec<Decoration>,
+    /// Non-solid things placed off the main grid, can't affect movement but see other hooks
+    pub sensors: Vec<Sensor>,
     /// Current player position on this board. See [`PlayerPos`] for caveats
     /// about its future. Game-global player *stats* live in [`crate::player::Player`].
     pub player: PlayerPos,
@@ -176,7 +179,7 @@ impl Board {
         // non-solid object (lets invisible trigger objects exist).
         let mut nonsolid: Option<Glyph> = None;
         for o in self.objects.values().filter(|o| o.x == x && o.y == y) {
-            if o.solid {
+            if o.behavior.solid {
                 return o.glyph;
             }
             if nonsolid.is_none() && o.glyph.tile != 0 {
@@ -245,17 +248,7 @@ impl Board {
         // A solid object shadows the cell it sits on; capture its behavior now.
         if let Some(id) = self.solid_object_id_at(x, y) {
             let obj = &self.objects[&id];
-            let behavior = Behavior {
+            let behavior = obj.behavior;
-                solid: obj.solid,
-                opaque: obj.opaque,
-                // ObjectDef stores pushability as a bool meaning "any direction".
-                pushable: if obj.pushable {
-                    Pushable::Any
-                } else {
-                    Pushable::No
-                },
-                grab: obj.grab,
-            };
             return Some(Solid::object_at(x, y, id, behavior));
         }
         // Otherwise the grid cell's terrain archetype may be solid (e.g. a wall).
@@ -282,7 +275,7 @@ impl Board {
     /// Panics if `x` or `y` are out of bounds.
     pub fn is_opaque_at(&self, x: usize, y: usize) -> bool {
         self.get(x, y).1.behavior().opaque
-            || self.objects.values().any(|o| o.x == x && o.y == y && o.opaque)
+            || self.objects.values().any(|o| o.x == x && o.y == y && o.behavior.opaque)
     }
 
     /// Computes lighting + line-of-sight for the player on this board.
@@ -327,8 +320,8 @@ impl Board {
         }
         // Light-emitting objects: color = their own glyph foreground.
         for o in self.objects.values() {
-            if o.light > 0 {
+            if o.behavior.glow > 0 {
-                add_source(&mut lighting, o.x, o.y, o.light, color_to_rgb(o.glyph.fg));
+                add_source(&mut lighting, o.x, o.y, o.behavior.glow, color_to_rgb(o.glyph.fg));
             }
         }
         // Glowing terrain (e.g. a `Torch` cell): color = the cell's glyph foreground.
@@ -377,7 +370,16 @@ impl Board {
             let solid = self.solid_at(cx, cy)?;
             // A solid object — directly, or at the end of a crate chain — is the target.
             if let Some(id) = solid.object_id() {
-                return Some(id);
+                let obj = self.objects.get(&id)?;
+                let resp = EnterResponse::from(obj.behavior);
+                if let EnterResponse::Push(p) = resp && !p.allows(dir) {
+                    // This object can't be pushed that way, so, this is a bump. If it's pushable, the
+                    // default push behavior happens (it just gets pushed)
+                    return Some(id);
+                } else if resp == EnterResponse::Block {
+                    // It's just a wall, block everything
+                    return Some(id);
+                }
             }
             // The player is never itself "bumped"; a wall (non-pushable terrain) stops
             // the chain with no object behind it. Only a pushable crate is walked
@@ -528,7 +530,7 @@ impl Board {
     pub fn non_solid_object_ids_at(&self, x: usize, y: usize) -> Vec<ObjectId> {
         self.objects
             .iter()
-            .filter(|(_, o)| o.x == x && o.y == y && !o.solid)
+            .filter(|(_, o)| o.x == x && o.y == y && !o.behavior.solid)
             .map(|(&id, _)| id)
             .collect()
     }
@@ -536,7 +538,7 @@ impl Board {
     /// Returns a borrow of the actual object at `(x, y)` if any
     pub fn solid_object_id_at(&self, x: usize, y: usize) -> Option<ObjectId> {
         self.objects.iter().find_map(|(&id, o)| {
-            if o.x == x && o.y == y && o.solid {
+            if o.x == x && o.y == y && o.behavior.solid {
                 Some(id)
             } else {
                 None
@@ -551,7 +553,7 @@ impl Board {
     /// the object's `grab()` hook fires instead.
     pub fn grab_object_at(&self, x: usize, y: usize) -> Option<ObjectId> {
         self.objects.iter().find_map(|(&id, o)| {
-            if o.x == x && o.y == y && o.solid && o.grab {
+            if o.x == x && o.y == y && EnterResponse::from(o.behavior) == EnterResponse::Grab {
                 Some(id)
             } else {
                 None
@@ -645,13 +647,7 @@ impl Board {
             let beh = b.behavior();
             let mut obj = ObjectDef::new(x, y);
             obj.glyph = glyph;
-            obj.solid = beh.solid;
+            obj.behavior = beh;
-            obj.opaque = beh.opaque;
-            // Carry the archetype's pushability/grab onto the object (pushers and
-            // spinners are Pushable::No, so they stay unpushable; gems are pushable
-            // and grabbable).
-            obj.pushable = beh.pushable != crate::utils::Pushable::No;
-            obj.grab = beh.grab;
             obj.builtin_script = Some(b.script());
             // The compile-cache key and the BUILTIN_* tag are both derived from the
             // alias (e.g. "BUILTIN_pusher_east"), so each alias gets its own cached
@@ -758,7 +754,7 @@ pub(crate) mod tests {
     use crate::floor::Floor;
     use crate::glyph::Glyph;
     use crate::object_def::ObjectDef;
-    use crate::utils::Direction;
+    use crate::utils::{Direction, Pushable};
     use crate::utils::{ObjectId, PlayerPos};
     use color::Rgba8;
     use std::collections::{BTreeMap, HashMap};
@@ -789,6 +785,7 @@ pub(crate) mod tests {
             grid: vec![(Glyph::transparent(), Archetype::Empty); w * h],
             floor: Floor::Blank,
             decorations: Vec::new(),
+            sensors: Vec::new(),
             player: PlayerPos {
                 x: player.0,
                 y: player.1,
@@ -811,12 +808,12 @@ pub(crate) mod tests {
 
     /// Stamps a crate cell onto the grid.
     pub(crate) fn crate_at(board: &mut Board, x: usize, y: usize) {
-        *board.get_mut(x, y) = (Archetype::Crate.default_glyph(), Archetype::Crate);
+        *board.get_mut(x, y) = (Archetype::Builtin(Builtin::Crate, "crate").default_glyph(), Archetype::Builtin(Builtin::Crate, "crate"));
     }
 
     /// Stamps a wall cell onto the grid.
     pub(crate) fn wall_at(board: &mut Board, x: usize, y: usize) {
-        *board.get_mut(x, y) = (Archetype::Wall.default_glyph(), Archetype::Wall);
+        *board.get_mut(x, y) = (Builtin::Wall.default_glyph_for("wall"), Archetype::Builtin(Builtin::Wall, "wall"));
     }
 
     /// Stamps an arbitrary archetype cell onto the grid.
@@ -824,7 +821,7 @@ pub(crate) mod tests {
         *board.get_mut(x, y) = (arch.default_glyph(), arch);
     }
 
-    #[test]
+        #[test]
     fn solid_at_reports_wall_object_and_empty() {
         let mut board = open_board(4, 1, (3, 0), vec![]);
         wall_at(&mut board, 1, 0);
@@ -834,7 +831,7 @@ pub(crate) mod tests {
         assert!(board.is_passable(0, 0));
 
         let wall = board.solid_at(1, 0).expect("a wall is solid");
-        assert_eq!(wall.archetype(), Some(Archetype::Wall));
+        assert_eq!(wall.archetype(), Some(Archetype::Builtin(Builtin::Wall, "wall")));
         assert!(!board.is_passable(1, 0));
 
         let obj = board.solid_at(2, 0).expect("an object is solid");
@@ -847,8 +844,8 @@ pub(crate) mod tests {
     fn grab_object_at_detects_a_gem() {
         // A grabbable gem object at (1,0); the player at (2,0).
         let mut gem = ObjectDef::new(1, 0);
-        gem.grab = true;
+        gem.behavior.grab = true;
-        gem.pushable = true;
+        gem.behavior.pushable = Pushable::Any;
         let board = open_board(3, 1, (2, 0), vec![gem]);
 
         // grab_object_at finds the gem on its own cell, nowhere else.
@@ -859,7 +856,7 @@ pub(crate) mod tests {
     #[test]
     fn non_solid_object_does_not_block() {
         let mut obj = ObjectDef::new(1, 0);
-        obj.solid = false;
+        obj.behavior.solid = false;
         let board = open_board(3, 1, (0, 0), vec![obj]);
         assert!(board.solid_at(1, 0).is_none());
         assert!(board.is_passable(1, 0));
@@ -891,7 +888,7 @@ pub(crate) mod tests {
         let mut board = open_board(3, 1, (0, 0), vec![]);
         crate_at(&mut board, 1, 0);
         assert!(board.can_push(1, 0, Direction::East));
-        assert_eq!(board.get(1, 0).1, Archetype::Crate); // no mutation
+        assert_eq!(board.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // no mutation
         assert_eq!(board.get(2, 0).1, Archetype::Empty);
 
         let mut board = open_board(3, 1, (0, 0), vec![]);
@@ -909,7 +906,7 @@ pub(crate) mod tests {
         // Crate with open space ahead: shiftable.
         crate_at(&mut board, 0, 0);
         assert!(board.can_shift(0, 0, Direction::East));
-        assert_eq!(board.get(0, 0).1, Archetype::Crate); // read-only
+        assert_eq!(board.get(0, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // read-only
 
         // Crate with another pushable crate ahead: still shiftable (unlike can_push,
         // which would follow the chain to the wall and fail).
@@ -937,8 +934,8 @@ pub(crate) mod tests {
         // The player is always a blocker for a shift — even a grab gem may not shift
         // onto it (grab now fires only on player movement, not on being shifted in).
         let mut gem = ObjectDef::new(0, 0);
-        gem.grab = true;
+        gem.behavior.grab = true;
-        gem.pushable = true;
+        gem.behavior.pushable = Pushable::Any;
         let board = open_board(2, 1, (1, 0), vec![gem]);
         assert!(!board.can_shift(0, 0, Direction::East));
 
@@ -956,7 +953,7 @@ pub(crate) mod tests {
         assert!(board.can_push(1, 0, Direction::East));
         board.push(1, 0, Direction::East);
         assert_eq!(board.get(1, 0).1, Archetype::Empty);
-        assert_eq!(board.get(2, 0).1, Archetype::Crate);
+        assert_eq!(board.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
         assert_eq!((board.player.x, board.player.y), (3, 0));
     }
 
@@ -968,7 +965,7 @@ pub(crate) mod tests {
         wall_at(&mut board, 3, 0);
         assert!(!board.can_push(1, 0, Direction::East));
         board.push(1, 0, Direction::East); // no-op
-        assert_eq!(board.get(1, 0).1, Archetype::Crate);
+        assert_eq!(board.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
         assert_eq!((board.player.x, board.player.y), (2, 0));
     }
 
@@ -995,7 +992,7 @@ pub(crate) mod tests {
         add_floor(&mut board, floor_glyph);
         wall_at(&mut board, 0, 0);
         // The wall (solid) draws over the floor; the empty cell reveals the floor.
-        assert_eq!(board.glyph_at(0, 0), Archetype::Wall.default_glyph());
+        assert_eq!(board.glyph_at(0, 0), Builtin::Wall.default_glyph_for("wall"));
         assert_eq!(board.glyph_at(1, 0), floor_glyph);
     }
 
@@ -1009,11 +1006,11 @@ pub(crate) mod tests {
         };
         add_floor(&mut board, floor);
 
-        let wall = Archetype::Wall.default_glyph();
+        let wall = Builtin::Wall.default_glyph_for("wall");
-        board.place_archetype(1, 0, Archetype::Wall, wall);
+        board.place_archetype(1, 0, Archetype::Builtin(Builtin::Wall, "wall"), wall);
 
         // The wall landed on the grid; the floor attribute is untouched.
-        assert_eq!(board.get(1, 0), &(wall, Archetype::Wall));
+        assert_eq!(board.get(1, 0), &(wall, Archetype::Builtin(Builtin::Wall, "wall")));
         // The solid object that was there is gone.
         assert!(board.object_ids_at(1, 0).is_empty());
         assert_eq!(board.glyph_at(1, 0), wall);
@@ -1024,16 +1021,16 @@ pub(crate) mod tests {
         // A crate already occupies the grid at (1,0).
         let mut board = open_board(3, 1, (2, 0), vec![]);
         crate_at(&mut board, 1, 0);
-        let wall = Archetype::Wall.default_glyph();
+        let wall = Builtin::Wall.default_glyph_for("wall");
-        board.place_archetype(1, 0, Archetype::Wall, wall);
+        board.place_archetype(1, 0, Archetype::Builtin(Builtin::Wall, "wall"), wall);
-        assert_eq!(board.get(1, 0), &(wall, Archetype::Wall));
+        assert_eq!(board.get(1, 0), &(wall, Archetype::Builtin(Builtin::Wall, "wall")));
     }
 
     #[test]
     fn erase_removes_terrain_and_objects_but_keeps_floor() {
         // A fixed floor attribute, a wall on the grid, and a (non-solid) object at (1,0).
         let mut obj = ObjectDef::new(1, 0);
-        obj.solid = false;
+        obj.behavior.solid = false;
         let mut board = open_board(3, 1, (2, 0), vec![obj]);
         let floor = Glyph {
             tile: '.' as u32,
@@ -1072,7 +1069,7 @@ pub(crate) mod tests {
         assert_eq!(board.get(0, 0).1, Archetype::Empty);
         let obj = board.objects.values().next().expect("spinner object");
         assert_eq!((obj.x, obj.y), (0, 0));
-        assert!(obj.solid);
+        assert!(obj.behavior.solid);
         assert!(obj.builtin_script.is_some());
         assert!(obj.tags.contains("BUILTIN_spinner_cw"));
 
@@ -1098,7 +1095,7 @@ pub(crate) mod tests {
         crate_at(&mut board, 0, 0);
         let errs = board.apply_shift(&[(0, 0), (9, 0)]);
         assert_eq!(errs.errors.len(), 1);
-        assert_eq!(board.get(0, 0).1, Archetype::Crate); // unchanged
+        assert_eq!(board.get(0, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // unchanged
     }
 
     #[test]
@@ -1122,11 +1119,11 @@ pub(crate) mod tests {
         //         Crate(3,0)→(4,0), Crate(4,0)→(0,0) wrap
         let _errs = board.apply_shift(&[(0, 0), (1, 0), (2, 0), (3, 0), (4, 0)]);
 
-        assert_eq!(board.get(0, 0).1, Archetype::Crate); // wrapped from (4,0)
+        assert_eq!(board.get(0, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // wrapped from (4,0)
-        assert_eq!(board.get(1, 0).1, Archetype::Crate); // moved from (0,0)
+        assert_eq!(board.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // moved from (0,0)
-        assert_eq!(board.get(2, 0).1, Archetype::Wall); // blocked, immobile
+        assert_eq!(board.get(2, 0).1, Archetype::Builtin(Builtin::Wall, "wall")); // blocked, immobile
         assert_eq!(board.get(3, 0).1, Archetype::Empty); // cleared, crate moved
-        assert_eq!(board.get(4, 0).1, Archetype::Crate); // moved from (3,0)
+        assert_eq!(board.get(4, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // moved from (3,0)
     }
 
     #[test]
@@ -1139,21 +1136,21 @@ pub(crate) mod tests {
         // Subcase A: HCrate moves
         {
             let mut board = open_board(4, 1, (3, 0), vec![]);
-            stamp(&mut board, 0, 0, Archetype::HCrate);
+            stamp(&mut board, 0, 0, Archetype::Builtin(Builtin::HCrate, "hcrate"));
             crate_at(&mut board, 1, 0);
             // (2,0) empty
 
             let _errs = board.apply_shift(&[(0, 0), (1, 0), (2, 0)]);
 
             assert_eq!(board.get(0, 0).1, Archetype::Empty); // HCrate moved out
-            assert_eq!(board.get(1, 0).1, Archetype::HCrate); // moved from (0,0)
+            assert_eq!(board.get(1, 0).1, Archetype::Builtin(Builtin::HCrate, "hcrate")); // moved from (0,0)
-            assert_eq!(board.get(2, 0).1, Archetype::Crate); // moved from (1,0)
+            assert_eq!(board.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // moved from (1,0)
         }
 
         // Subcase B: VCrate stays; Crate behind it still moves
         {
             let mut board = open_board(4, 1, (3, 0), vec![]);
-            stamp(&mut board, 0, 0, Archetype::VCrate);
+            stamp(&mut board, 0, 0, Archetype::Builtin(Builtin::VCrate, "vcrate"));
             crate_at(&mut board, 1, 0);
             // (2,0) empty
 
@@ -1163,9 +1160,9 @@ pub(crate) mod tests {
             // Crate at (1,0) is NOT in blocked, so it moves.
             let _errs = board.apply_shift(&[(0, 0), (1, 0), (2, 0)]);
 
-            assert_eq!(board.get(0, 0).1, Archetype::VCrate); // immobile
+            assert_eq!(board.get(0, 0).1, Archetype::Builtin(Builtin::VCrate, "vcrate")); // immobile
             assert_eq!(board.get(1, 0).1, Archetype::Empty); // crate moved out
-            assert_eq!(board.get(2, 0).1, Archetype::Crate); // moved from (1,0)
+            assert_eq!(board.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // moved from (1,0)
         }
     }
 
@@ -1178,22 +1175,22 @@ pub(crate) mod tests {
         // Subcase A: VCrate moves
         {
             let mut board = open_board(1, 4, (0, 3), vec![]);
-            stamp(&mut board, 0, 0, Archetype::VCrate);
+            stamp(&mut board, 0, 0, Archetype::Builtin(Builtin::VCrate, "vcrate"));
-            stamp(&mut board, 0, 1, Archetype::Crate);
+            stamp(&mut board, 0, 1, Archetype::Builtin(Builtin::Crate, "crate"));
             // (0,2) empty
 
             let _errs = board.apply_shift(&[(0, 0), (0, 1), (0, 2)]);
 
             assert_eq!(board.get(0, 0).1, Archetype::Empty); // VCrate moved out
-            assert_eq!(board.get(0, 1).1, Archetype::VCrate); // moved from (0,0)
+            assert_eq!(board.get(0, 1).1, Archetype::Builtin(Builtin::VCrate, "vcrate")); // moved from (0,0)
-            assert_eq!(board.get(0, 2).1, Archetype::Crate); // moved from (0,1)
+            assert_eq!(board.get(0, 2).1, Archetype::Builtin(Builtin::Crate, "crate")); // moved from (0,1)
         }
 
         // Subcase B: HCrate stays; Crate behind it still moves
         {
             let mut board = open_board(1, 4, (0, 3), vec![]);
-            stamp(&mut board, 0, 0, Archetype::HCrate);
+            stamp(&mut board, 0, 0, Archetype::Builtin(Builtin::HCrate, "hcrate"));
-            stamp(&mut board, 0, 1, Archetype::Crate);
+            stamp(&mut board, 0, 1, Archetype::Builtin(Builtin::Crate, "crate"));
             // (0,2) empty
 
             // HCrate (idx 0): target (0,1), origin (0,0), vmove=true.
@@ -1202,9 +1199,9 @@ pub(crate) mod tests {
             // Crate at (0,1) is NOT in blocked, so it moves.
             let _errs = board.apply_shift(&[(0, 0), (0, 1), (0, 2)]);
 
-            assert_eq!(board.get(0, 0).1, Archetype::HCrate); // immobile
+            assert_eq!(board.get(0, 0).1, Archetype::Builtin(Builtin::HCrate, "hcrate")); // immobile
             assert_eq!(board.get(0, 1).1, Archetype::Empty); // crate moved out
-            assert_eq!(board.get(0, 2).1, Archetype::Crate); // moved from (0,1)
+            assert_eq!(board.get(0, 2).1, Archetype::Builtin(Builtin::Crate, "crate")); // moved from (0,1)
         }
     }
 
@@ -1261,8 +1258,8 @@ pub(crate) mod tests {
         let mut board = open_board(3, 1, (1, 0), vec![]);
         board.dark = true;
         let mut lamp = ObjectDef::new(1, 0);
-        lamp.solid = false;
+        lamp.behavior.solid = false;
-        lamp.light = 4;
+        lamp.behavior.glow = 4;
         lamp.glyph = Glyph { tile: 1, fg: Rgba8 { r: 255, g: 0, b: 0, a: 255 }, bg: Rgba8 { r: 0, g: 0, b: 0, a: 255 } };
         board.add_object(lamp);
 

kiln-core/src/game.rs

@@ -313,7 +313,7 @@ impl GameState {
                     }
                     Action::SetLight(radius) => {
                         if let Some(obj) = board.objects.get_mut(&ba.source) {
-                            obj.light = radius;
+                            obj.behavior.glow = radius;
                         }
                     }
                     Action::SetTag {
@@ -405,7 +405,7 @@ impl GameState {
                                     "teleport({target},{x},{y}): no such object"
                                 )),
                                 Some(obj) => {
-                                    let source_solid = obj.solid;
+                                    let source_solid = obj.behavior.solid;
                                     let (old_x, old_y) = (obj.x as i64, obj.y as i64);
                                     let blocked = source_solid
                                         && matches!(
@@ -742,7 +742,7 @@ fn step_object(board: &mut Board, id: ObjectId, dir: Direction) -> StepOutcome {
         entered: Vec::new(),
     };
     let (dx, dy): (i64, i64) = dir.into();
-    let Some((ox, oy, solid)) = board.objects.get(&id).map(|o| (o.x, o.y, o.solid)) else {
+    let Some((ox, oy, solid)) = board.objects.get(&id).map(|o| (o.x, o.y, o.behavior.solid)) else {
         return out;
     };
     let target = (ox as i64 + dx, oy as i64 + dy);
@@ -805,7 +805,7 @@ mod tests {
         // ordinary solid here: the chain can't move (the player is backed against
         // the board edge), so nothing happens and the gem is not collected.
         let mut sobj = ObjectDef::new(0, 0);
-        sobj.solid = false;
+        sobj.behavior.solid = false;
         sobj.script_name = Some("s".to_string());
         let mut board = open_board(3, 1, (2, 0), vec![sobj]);
         stamp(&mut board, 1, 0, Archetype::Builtin(Builtin::Gem, "gem"));
@@ -822,14 +822,14 @@ mod tests {
 
         // No grab: the gem is untouched and the player never moved.
         assert_eq!(game.player.borrow().gems, 0);
-        assert!(game.board().objects.values().any(|o| o.grab));
+        assert!(game.board().objects.values().any(|o| o.behavior.grab));
         assert_eq!((game.board().player.x, game.board().player.y), (2, 0));
     }
 
     /// Builds a `GameState` with one non-solid object running `src` as its script.
     fn game_with_object_script(board_w: usize, src: &str) -> GameState {
         let mut obj = ObjectDef::new(0, 0);
-        obj.solid = false;
+        obj.behavior.solid = false;
         obj.script_name = Some("s".to_string());
         let mut board = open_board(board_w, 1, (board_w as i64 - 1, 0), vec![obj]);
         crate_at(&mut board, 2, 0);
@@ -850,7 +850,7 @@ mod tests {
         game.tick(Duration::from_millis(16));
         let b = game.board();
         assert_eq!(b.get(2, 0).1, Archetype::Empty);
-        assert_eq!(b.get(3, 0).1, Archetype::Crate);
+        assert_eq!(b.get(3, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
     }
 
     #[test]
@@ -859,7 +859,7 @@ mod tests {
         // object sits at (0,0); the player at (3,0). passable should report only the
         // genuinely empty in-bounds cell.
         let mut obj = ObjectDef::new(0, 0);
-        obj.solid = false;
+        obj.behavior.solid = false;
         obj.script_name = Some("s".to_string());
         let mut board = open_board(4, 1, (3, 0), vec![obj]);
         crate_at(&mut board, 2, 0);
@@ -886,7 +886,7 @@ mod tests {
         // right after run_init (dt = 0) — under the old queued-Action behavior it
         // would have been stuck behind the delay and absent here.
         let mut obj = ObjectDef::new(0, 0);
-        obj.solid = false;
+        obj.behavior.solid = false;
         obj.script_name = Some("s".to_string());
         let board = open_board(4, 1, (3, 0), vec![obj]);
         let src = "fn init(m) { delay(5.0); log(\"immediate\"); }";
@@ -916,7 +916,7 @@ mod tests {
         ccw: bool,
     ) -> GameState {
         let mut obj = ObjectDef::new(1, 1);
-        obj.solid = false;
+        obj.behavior.solid = false;
         obj.script_name = Some("spinner".to_string());
         if ccw {
             obj.tags.insert("BUILTIN_spinner_ccw".to_string());
@@ -945,9 +945,9 @@ mod tests {
         let mut game = spinner_board(&[(1, 0), (2, 0)], &[(2, 1)]);
         game.tick(Duration::from_millis(16));
         let b = game.board();
-        assert_eq!(b.get(1, 0).1, Archetype::Crate); // N kept
+        assert_eq!(b.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // N kept
-        assert_eq!(b.get(2, 0).1, Archetype::Crate); // NE kept (not destroyed)
+        assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // NE kept (not destroyed)
-        assert_eq!(b.get(2, 1).1, Archetype::Wall); // wall kept
+        assert_eq!(b.get(2, 1).1, Archetype::Builtin(Builtin::Wall, "wall")); // wall kept
     }
 
     #[test]
@@ -957,9 +957,9 @@ mod tests {
         let mut game = spinner_board(&[(0, 1), (0, 0), (1, 0)], &[]);
         game.tick(Duration::from_millis(16));
         let b = game.board();
-        assert_eq!(b.get(2, 0).1, Archetype::Crate); // NE: filled by N
+        assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // NE: filled by N
-        assert_eq!(b.get(1, 0).1, Archetype::Crate); // N: filled by NW
+        assert_eq!(b.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // N: filled by NW
-        assert_eq!(b.get(0, 0).1, Archetype::Crate); // NW: filled by W
+        assert_eq!(b.get(0, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // NW: filled by W
         assert_eq!(b.get(0, 1).1, Archetype::Empty); // W: vacated (hole moved here)
     }
 
@@ -970,7 +970,7 @@ mod tests {
         let mut game = spinner_board_dir(&[(1, 0)], &[], true);
         game.tick(Duration::from_millis(16));
         let b = game.board();
-        assert_eq!(b.get(0, 0).1, Archetype::Crate); // NW: crate rotated counter-clockwise
+        assert_eq!(b.get(0, 0).1, Archetype::Builtin(Builtin::Crate, "crate")); // NW: crate rotated counter-clockwise
         assert_eq!(b.get(2, 0).1, Archetype::Empty); // NE: untouched
         assert_eq!(b.get(1, 0).1, Archetype::Empty); // N: vacated
     }
@@ -999,7 +999,7 @@ mod tests {
     #[test]
     fn set_key_gives_and_takes_keys() {
         let mut sobj = ObjectDef::new(0, 0);
-        sobj.solid = false;
+        sobj.behavior.solid = false;
         sobj.script_name = Some("s".to_string());
         let board = open_board(2, 1, (1, 0), vec![sobj]);
         let scripts = HashMap::from([(
@@ -1016,7 +1016,7 @@ mod tests {
 
         // A second script can take a key.
         let mut sobj2 = ObjectDef::new(0, 0);
-        sobj2.solid = false;
+        sobj2.behavior.solid = false;
         sobj2.script_name = Some("t".to_string());
         let board2 = open_board(2, 1, (1, 0), vec![sobj2]);
         let scripts2 = HashMap::from([(
@@ -1032,7 +1032,7 @@ mod tests {
     #[test]
     fn set_key_unknown_color_logs_error() {
         let mut sobj = ObjectDef::new(0, 0);
-        sobj.solid = false;
+        sobj.behavior.solid = false;
         sobj.script_name = Some("s".to_string());
         let board = open_board(2, 1, (1, 0), vec![sobj]);
         let scripts = HashMap::from([(

kiln-core/src/glyph.rs

@@ -1,6 +1,7 @@
 use color::Rgba8;
 use std::hash::{Hash, Hasher};
 use rhai::Engine;
+use serde::{Deserialize, Serialize};
 use crate::script::Registerable;
 use crate::utils::LogSink;
 
@@ -16,7 +17,7 @@ use crate::utils::LogSink;
 /// `Glyph` values come from the map file palette and are set at load time.
 /// The player is the only entity whose glyph is hardcoded at runtime
 /// (see [`Glyph::player`]).
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Serialize, Deserialize)]
 pub struct Glyph {
     /// Tile index into the board's bitmap font (left-to-right, top-to-bottom).
     pub tile: u32,

kiln-core/src/layer.rs

@@ -18,6 +18,7 @@ use crate::map_file::{TileIndex, parse_color};
 use crate::object_def::ObjectDef;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
+use crate::utils::Pushable;
 
 /// Serde representation of the board `[grid]`: a char grid plus its palette.
 ///
@@ -84,7 +85,7 @@ pub(crate) struct PaletteEntry {
     pub opaque: Option<bool>,
     /// Object pushability (defaults `false`). Only for `kind = "object"`.
     #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub pushable: Option<bool>,
+    pub pushable: Option<Pushable>,
     /// Light radius in cells emitted on a dark board (defaults `0` = none).
     /// Only for `kind = "object"`. See [`ObjectDef::light`].
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -129,7 +130,7 @@ pub(crate) struct ObjectTemplate {
     pub glyph: Glyph,
     pub solid: bool,
     pub opaque: bool,
-    pub pushable: bool,
+    pub pushable: Pushable,
     /// Light radius in cells (0 = none); see [`ObjectDef::light`].
     pub light: u32,
     pub script_name: Option<String>,
@@ -179,7 +180,7 @@ fn resolve_entry(ch: char, e: &PaletteEntry, errors: &mut Vec<LogLine>) -> Resol
             glyph: glyph_with_default(ObjectDef::default_glyph()),
             solid: e.solid.unwrap_or(true),
             opaque: e.opaque.unwrap_or(true),
-            pushable: e.pushable.unwrap_or(false),
+            pushable: e.pushable.unwrap_or(Pushable::No),
             light: e.light.unwrap_or(0),
             script_name: e.script_name.clone(),
             tags: e.tags.clone().unwrap_or_default(),

kiln-core/src/lib.rs

@@ -34,3 +34,4 @@ pub use utils::Direction;
 #[cfg(test)]
 mod tests;
 mod api;
+pub mod tile;

kiln-core/src/map_file.rs

@@ -25,7 +25,7 @@ use crate::glyph::Glyph;
 use crate::layer::{GridData, PaletteEntry, Placement, build_grid};
 use crate::log::LogLine;
 use crate::object_def::ObjectDef;
-use crate::utils::{ObjectId, PlayerPos, PortalDef};
+use crate::utils::{Behavior, ObjectId, PlayerPos, PortalDef, Pushable};
 
 /// The serde shell for one board in a `.toml` file: a header, the single grid, and
 /// the off-grid trigger/decoration lists.
@@ -316,13 +316,16 @@ impl TryFrom<MapFile> for Board {
                     x,
                     y,
                     glyph: t.glyph,
-                    solid: t.solid,
+                    behavior: Behavior {
-                    opaque: t.opaque,
+                        solid: t.solid,
-                    pushable: t.pushable,
+                        opaque: t.opaque,
-                    light: t.light,
+                        pushable: t.pushable,
-                    // Hand-placed objects are never grab targets; only expanded
+                        glow: t.light,
-                    // grab archetypes (e.g. gems) set this (see expand_builtin_archetypes).
+                        // Hand-placed objects are never grab targets; only expanded
-                    grab: false,
+                        // grab archetypes (e.g. gems) set this (see expand_builtin_archetypes).
+                        // TODO this is wrong, obviously we want grabbable objects
+                        grab: false,
+                    },
                     script_name: t.script_name,
                     // Script-backed archetypes are expanded after the board is built
                     // (see `expand_builtin_archetypes` below), not via templates.
@@ -355,11 +358,13 @@ impl TryFrom<MapFile> for Board {
                     x: t.x,
                     y: t.y,
                     glyph: Glyph::transparent(),
-                    solid: false,
+                    behavior: Behavior {
-                    opaque: false,
+                        solid: false,
-                    pushable: false,
+                        opaque: false,
-                    light: 0,
+                        pushable: Pushable::No,
-                    grab: false,
+                        glow: 0,
+                        grab: false,
+                    },
                     script_name: Some(t.script_name),
                     builtin_script: None,
                     tags: t.tags.unwrap_or_default().into_iter().collect(),
@@ -406,6 +411,7 @@ impl TryFrom<MapFile> for Board {
             grid,
             floor,
             decorations,
+            sensors: Vec::new(),
             player: PlayerPos {
                 x: px as i64,
                 y: py as i64,
@@ -514,7 +520,7 @@ fn cell_entry(glyph: Glyph, arch: Archetype) -> PaletteEntry {
 /// Whether an object is a **trigger** — an invisible, non-solid, script-only object
 /// authored/serialized in `[[triggers]]` rather than the grid palette.
 fn is_trigger(o: &ObjectDef) -> bool {
-    !o.solid && o.glyph.tile == 0 && o.script_name.is_some() && o.builtin_script.is_none()
+    !o.behavior.solid && o.glyph.tile == 0 && o.script_name.is_some() && o.builtin_script.is_none()
 }
 
 /// Serializes `board`'s single grid (terrain + non-trigger objects + portals +
@@ -563,10 +569,10 @@ fn grid_to_data(board: &Board) -> GridData {
                 tile: Some(TileIndex::Num(o.glyph.tile)),
                 fg: Some(color_to_hex(o.glyph.fg)),
                 bg: Some(color_to_hex(o.glyph.bg)),
-                solid: Some(o.solid),
+                solid: Some(o.behavior.solid),
-                opaque: Some(o.opaque),
+                opaque: Some(o.behavior.opaque),
-                pushable: Some(o.pushable),
+                pushable: Some(o.behavior.pushable),
-                light: (o.light > 0).then_some(o.light),
+                light: (o.behavior.glow > 0).then_some(o.behavior.glow),
                 script_name: o.script_name.clone(),
                 tags: (!tags.is_empty()).then_some(tags),
                 name: o.name.clone(),

kiln-core/src/object_def.rs

@@ -1,5 +1,5 @@
 use crate::glyph::Glyph;
-use crate::utils::ObjectId;
+use crate::utils::{Behavior, ObjectId, Pushable};
 use color::Rgba8;
 use std::collections::HashSet;
 use crate::api::queue::ObjQueue;
@@ -37,25 +37,8 @@ pub struct ObjectDef {
     /// Visual representation of this object. Owned by the object (not derived
     /// from the grid cell), so scripts can change tile, fg, and bg at runtime.
     pub glyph: Glyph,
-    /// Whether the object blocks / participates in movement. A solid object stops
+    /// All the normal `Behavior` things about this object
-    /// a mover walking into it; at most one solid (object or grid archetype) may
+    pub behavior: Behavior,
-    /// occupy a cell. Inverse of the old `passable` flag.
-    pub solid: bool,
-    /// Whether the object blocks line of sight / FOV for the player
-    pub opaque: bool,
-    /// Whether the object can be shoved by a mover. Unused for now (no push
-    /// mechanic yet); defaults to `false`.
-    pub pushable: bool,
-    /// Whether walking into this object **grabs** it: the player moves onto the
-    /// cell and the object's `grab()` hook fires (the object is expected to
-    /// remove itself via `die()`). Set when a grab archetype (e.g. a gem) is
-    /// expanded into an object. Defaults to `false`.
-    pub grab: bool,
-    /// Light radius in cells that this object emits on a `dark` board (0 = no
-    /// light). The emitted *color* is this object's own glyph foreground color,
-    /// so a red glyph casts red light. See [`crate::fov`] for the lighting model.
-    /// Scripts can change it at runtime via `set_light(n)`. Defaults to `0`.
-    pub light: u32,
     /// Compile-key of the Rhai script that drives this object: a name in
     /// [`World::scripts`](crate::world::World::scripts) for a hand-authored object,
     /// or a synthetic `BUILTIN_*` name set when a script-backed archetype is
@@ -103,11 +86,13 @@ impl ObjectDef {
             x,
             y,
             glyph: Self::default_glyph(),
-            solid: true,
+            behavior: Behavior {
-            opaque: true,
+                solid: true,
-            pushable: false,
+                opaque: true,
-            grab: false,
+                pushable: Pushable::No,
-            light: 0,
+                grab: false,
+                glow: 0,
+            },
             script_name: None,
             builtin_script: None,
             tags: HashSet::new(),

kiln-core/src/tests/actions.rs

@@ -3,6 +3,7 @@ use crate::archetype::Archetype;
 use crate::board::tests::{crate_at, open_board, wall_at};
 use crate::game::GameState;
 use std::time::Duration;
+use crate::Builtin;
 
 #[test]
 fn move_command_relocates_the_source_object() {
@@ -45,7 +46,7 @@ fn object_pushes_crate_on_init() {
     let b = game.board();
     assert_eq!((b.objects[&1].x, b.objects[&1].y), (2, 0));
     assert_eq!(b.get(2, 0).1, Archetype::Empty);
-    assert_eq!(b.get(3, 0).1, Archetype::Crate);
+    assert_eq!(b.get(3, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
 }
 
 #[test]

kiln-core/src/tests/game_portals.rs

@@ -18,6 +18,7 @@ fn make_board(px: i64, py: i64, portals: Vec<PortalDef>) -> Board {
         grid: vec![(Glyph::transparent(), Archetype::Empty); 9],
         floor: Floor::Blank,
         decorations: Vec::new(),
+        sensors: Vec::new(),
         player: PlayerPos { x: px, y: py },
         objects: BTreeMap::new(),
         next_object_id: 1,

kiln-core/src/tests/map_file/fill_sparse.rs

@@ -19,12 +19,14 @@ palette = { "#" = { kind = "wall", tile = 35, fg = "#808080", bg = "#606060" } }
     let board = load_board(toml);
     for y in 0..2 {
         for x in 0..3 {
-            let expected = if (x, y) == (0, 0) {
+            if (x, y) == (0, 0) { // player won its fallback cell
-                Archetype::Empty // player won its fallback cell
+                assert!(board.solid_at(x, y).unwrap().player());
             } else {
-                Archetype::Wall
+                let obj = &board.objects[&board.object_ids_at(x, y)[0]];
-            };
+                let tag = obj.tags.iter().next().unwrap();
-            assert_eq!(board.get(x, y).1, expected, "cell ({x}, {y})");
+                assert_eq!(tag, "BUILTIN_wall")
+            }
+
         }
     }
     assert_eq!((board.player.x, board.player.y), (0, 0));

kiln-core/src/tests/map_file/object_placement.rs

@@ -77,6 +77,6 @@ fn non_solid_object_and_wall_coexist_in_separate_cells() {
     // never be authored onto a wall cell. A wall and a (separate-cell) non-solid
     // object both load fine.
     let board = load_board(&map_3x1_object("#G@", "G", "solid = false"));
-    assert_eq!(board.objects.len(), 1);
+    assert_eq!(board.objects.len(), 2); // The wall (for now) shows up as an object because it's a builtin, TODO
     assert!(board.is_valid());
 }

kiln-core/src/tests/map_file/pushers.rs

@@ -7,6 +7,7 @@ use crate::game::GameState;
 use crate::map_file::MapFile;
 use crate::object_def::ObjectDef;
 use std::time::Duration;
+use crate::{Board, Builtin};
 
 /// Finds the pusher object on a board (by its built-in tag).
 fn pusher<'a>(board: &'a crate::board::Board, id: &mut u32) -> &'a ObjectDef {
@@ -42,6 +43,10 @@ fn pusher_loads_as_a_tagged_scripted_solid_object() {
     assert!(!board.is_passable(0, 0), "pusher is solid");
 }
 
+fn is_tag(board: &Board, x: usize, y: usize, tag: &str) -> bool {
+    board.object_ids_at(x, y).iter().any(|id| board.objects[id].tags.contains(tag))
+}
+
 #[test]
 fn pusher_advances_and_shoves_a_crate() {
     // Pusher at (0,0), crate at (1,0), the player parked at the east edge.
@@ -74,7 +79,7 @@ fn pusher_advances_and_shoves_a_crate() {
         "crate left its start cell"
     );
     assert!(
-        (2..b.width).any(|x| b.get(x, 0).1 == Archetype::Crate),
+        (2..b.width).any(|x| is_tag(&b, x, 0, "BUILTIN_crate")),
         "crate was shoved east"
     );
 }

kiln-core/src/tests/map_file/transporters.rs

@@ -10,7 +10,7 @@ use crate::utils::Direction;
 use std::time::Duration;
 
 #[test]
-fn transporter_loads_as_a_tagged_scripted_solid_object() {
+fn transporter_loads_as_a_tagged_scripted_object() {
     let board = load_board(&map(
         3,
         1,
@@ -26,9 +26,6 @@ fn transporter_loads_as_a_tagged_scripted_solid_object() {
         .expect("transporter object");
     assert_eq!((obj.x, obj.y), (1, 0));
     assert!(obj.builtin_script.is_some(), "carries the embedded script");
-    assert!(obj.solid, "transporter is solid");
-    assert!(!obj.opaque, "transporter is see-through");
-    assert!(!obj.pushable, "transporter cannot be pushed");
 }
 
 #[test]

kiln-core/src/tests/mod.rs

@@ -32,6 +32,7 @@ fn board_with_object(
         grid: vec![(Glyph::transparent(), Archetype::Empty)],
         floor: Floor::Blank,
         decorations: Vec::new(),
+        sensors: Vec::new(),
         player: PlayerPos { x: 0, y: 0 },
         objects: BTreeMap::from([(1, object)]),
         next_object_id: 2,
@@ -64,7 +65,7 @@ fn scripted_object(x: usize, y: usize, script: &str) -> ObjectDef {
 /// kind that receives an `enter` hook when a solid relocates onto its cell.
 fn nonsolid_object(x: usize, y: usize, script: &str) -> ObjectDef {
     let mut o = scripted_object(x, y, script);
-    o.solid = false;
+    o.behavior.solid = false;
     o
 }
 

kiln-core/src/tests/movement.rs

@@ -3,8 +3,9 @@ use crate::board::tests::{add_floor, crate_at, open_board, stamp, wall_at};
 use crate::game::GameState;
 use crate::glyph::Glyph;
 use crate::object_def::ObjectDef;
-use crate::utils::Direction;
+use crate::utils::{Direction, Pushable};
 use color::Rgba8;
+use crate::Builtin;
 
 #[test]
 fn pushing_a_crate_reveals_the_floor_underneath() {
@@ -32,7 +33,7 @@ fn pushing_a_crate_reveals_the_floor_underneath() {
     let mut game = GameState::new(board);
     game.try_move(Direction::East);
     let b = game.board();
-    assert_eq!(b.get(2, 0).1, Archetype::Crate);
+    assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
     assert_eq!(b.get(1, 0).1, Archetype::Empty);
     assert_eq!(b.glyph_at(0, 0), floor_glyph);
 }
@@ -46,7 +47,7 @@ fn player_pushes_single_crate() {
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (1, 0));
     assert_eq!(b.get(1, 0).1, Archetype::Empty);
-    assert_eq!(b.get(2, 0).1, Archetype::Crate);
+    assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
 }
 
 #[test]
@@ -58,8 +59,8 @@ fn push_blocked_by_wall_moves_nothing() {
     game.try_move(Direction::East);
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (0, 0));
-    assert_eq!(b.get(1, 0).1, Archetype::Crate);
+    assert_eq!(b.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
-    assert_eq!(b.get(2, 0).1, Archetype::Wall);
+    assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::Wall, "wall"));
 }
 
 #[test]
@@ -71,7 +72,7 @@ fn push_blocked_by_edge_moves_nothing() {
     game.try_move(Direction::East);
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (0, 0));
-    assert_eq!(b.get(1, 0).1, Archetype::Crate);
+    assert_eq!(b.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
 }
 
 #[test]
@@ -84,8 +85,8 @@ fn cascade_pushes_two_crates() {
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (1, 0));
     assert_eq!(b.get(1, 0).1, Archetype::Empty);
-    assert_eq!(b.get(2, 0).1, Archetype::Crate);
+    assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
-    assert_eq!(b.get(3, 0).1, Archetype::Crate);
+    assert_eq!(b.get(3, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
 }
 
 #[test]
@@ -98,15 +99,15 @@ fn cascade_blocked_by_wall_moves_nothing() {
     game.try_move(Direction::East);
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (0, 0));
-    assert_eq!(b.get(1, 0).1, Archetype::Crate);
+    assert_eq!(b.get(1, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
-    assert_eq!(b.get(2, 0).1, Archetype::Crate);
+    assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::Crate, "crate"));
 }
 
 #[test]
 fn player_pushes_pushable_solid_object() {
     // A solid, pushable object is shoved exactly like a crate.
     let mut obj = ObjectDef::new(1, 0);
-    obj.pushable = true;
+    obj.behavior.pushable = Pushable::Any;
     let board = open_board(4, 1, (0, 0), vec![obj]);
     let mut game = GameState::new(board);
     game.try_move(Direction::East);
@@ -119,44 +120,44 @@ fn player_pushes_pushable_solid_object() {
 fn hcrate_pushes_east_but_not_north() {
     // Pushing east: the HCrate slides.
     let mut board = open_board(4, 1, (0, 0), vec![]);
-    stamp(&mut board, 1, 0, Archetype::HCrate);
+    stamp(&mut board, 1, 0, Archetype::Builtin(Builtin::HCrate, "hcrate"));
     let mut game = GameState::new(board);
     game.try_move(Direction::East);
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (1, 0));
     assert_eq!(b.get(1, 0).1, Archetype::Empty);
-    assert_eq!(b.get(2, 0).1, Archetype::HCrate);
+    assert_eq!(b.get(2, 0).1, Archetype::Builtin(Builtin::HCrate, "hcrate"));
     drop(b);
 
     // Pushing north into an HCrate: blocked, nothing moves.
     let mut board = open_board(1, 4, (0, 3), vec![]);
-    stamp(&mut board, 0, 2, Archetype::HCrate);
+    stamp(&mut board, 0, 2, Archetype::Builtin(Builtin::HCrate, "hcrate"));
     let mut game = GameState::new(board);
     game.try_move(Direction::North);
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (0, 3));
-    assert_eq!(b.get(0, 2).1, Archetype::HCrate);
+    assert_eq!(b.get(0, 2).1, Archetype::Builtin(Builtin::HCrate, "hcrate"));
 }
 
 #[test]
 fn vcrate_pushes_north_but_not_east() {
     // Pushing north: the VCrate slides.
     let mut board = open_board(1, 4, (0, 3), vec![]);
-    stamp(&mut board, 0, 2, Archetype::VCrate);
+    stamp(&mut board, 0, 2, Archetype::Builtin(Builtin::VCrate, "vcrate"));
     let mut game = GameState::new(board);
     game.try_move(Direction::North);
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (0, 2));
     assert_eq!(b.get(0, 2).1, Archetype::Empty);
-    assert_eq!(b.get(0, 1).1, Archetype::VCrate);
+    assert_eq!(b.get(0, 1).1, Archetype::Builtin(Builtin::VCrate, "vcrate"));
     drop(b);
 
     // Pushing east into a VCrate: blocked, nothing moves.
     let mut board = open_board(4, 1, (0, 0), vec![]);
-    stamp(&mut board, 1, 0, Archetype::VCrate);
+    stamp(&mut board, 1, 0, Archetype::Builtin(Builtin::VCrate, "vcrate"));
     let mut game = GameState::new(board);
     game.try_move(Direction::East);
     let b = game.board();
     assert_eq!((b.player.x, b.player.y), (0, 0));
-    assert_eq!(b.get(1, 0).1, Archetype::VCrate);
+    assert_eq!(b.get(1, 0).1, Archetype::Builtin(Builtin::VCrate, "vcrate"));
 }

kiln-core/src/tile.rs

@@ -0,0 +1,128 @@
+use std::collections::HashSet;
+use serde::{Deserialize, Serialize};
+use crate::api::queue::ObjQueue;
+use crate::glyph::Glyph;
+use crate::object_def::ObjectDef;
+use crate::utils::{Behavior, ObjectId, Pushable};
+
+/// The various ways that a tile might respond to another tile trying to move on top of it
+#[derive(Serialize, Deserialize, PartialEq, Copy, Clone, Debug)]
+pub enum EnterResponse {
+    /// Flat denial: don't let the move happen, block it.
+    Block,
+    /// Call the `grab` hook and then remove this object.
+    /// TODO will do something different once inventory exists as a concept
+    Grab,
+    /// Attempt to exit the cell ourselves, the opposite direction. This of course recurses; if our move
+    /// is denied then this is the same as a block.
+    Push(Pushable),
+    /// Call an `enter` hook and do something. The hook is responsible for resolving the conflict:
+    /// placing the moving-object somewhere else, moving ourselves somewhere else, or whatever.
+    /// It should return `true` or `false`: this return value is passed back up a `Push` chain to
+    /// the original moving object, determining whether the moves should happen.
+    /// Example: a teleporter moves anything that enters it to another spot, if it's unblocked. It
+    /// will check if the target cell is open and move the object there if it is, returning true.
+    /// If you push a crate into it, it returning true means you should move (into the space the crate
+    /// left behind); it returning false means the crate wasn't teleported so your move is blocked
+    /// also.
+    /// The hook return value is only used for _other_ things in the chain: regardless of what's returned,
+    /// the engine won't touch the crate or the teleporter; the hook is responsible for handling the
+    /// actual collision. A teleporter that teleports the crate and returns false will leave an empty
+    /// space behind (the player won't move into it because it returned false); a teleporter that
+    /// returns true without teleporting the crate, the crate will be destroyed by the player moving
+    /// on top of it.
+    Hook,
+    /// Swap places with whatever moved on top of you
+    Swap,
+    /// Get overwritten and destroyed by whatever moved on top of us. Right now, equivalent to `Grab`
+    /// if the hook does nothing (but in the future `Grab` will have other builtin behavior)
+    Squish
+}
+
+impl From<Behavior> for EnterResponse {
+    fn from(behavior: Behavior) -> EnterResponse {
+        if behavior.grab {
+            EnterResponse::Grab
+        } else if behavior.pushable != Pushable::No {
+            EnterResponse::Push(behavior.pushable)
+        } else if behavior.solid {
+            EnterResponse::Block
+        } else {
+            EnterResponse::Squish
+        }
+    }
+}
+
+/// Where `Sensor`s are drawn, in relation to the grid:
+/// - `Above` is above everything, including the player. If the glyph has a nonzero tile, and it's
+/// visible / lit, it will be drawn.
+/// - `Below` is below the grid but above the floor. A nonzero-tile-glyph will be drawn only if
+/// there's not a grid-thing in the same cell.
+#[derive(Serialize, Deserialize, PartialEq, Copy, Clone, Debug)]
+#[serde(rename = "lowercase")]
+pub enum DrawLayer { Above, Below }
+
+/// How a thing interacts with the lighting and visibility models
+#[derive(Serialize, Deserialize, PartialEq, Copy, Clone, Debug)]
+#[serde(rename = "lowercase")]
+pub struct Optics {
+    /// Opaque things block field of view
+    pub opaque: bool,
+    /// The brightness (in number of cells' radius) of light this
+    /// emits. It will emit light in the color of the foreground of its glyph.
+    /// A cell is visible if:
+    /// - the level isn't dark, in which case lighting isn't calculated
+    /// - the cell is within the field of view
+    /// - the cell is within the glow radius of at least one light source
+    ///
+    /// Its color will be tinted by the light sources illuminating it.
+    pub glow: u32,
+}
+
+/// Everything an object-or-sensor needs to have a Rhai script attached.
+/// TODO clean this up some, especially the script_name-vs-builtin_script dichotomy
+#[derive(Clone, Default)]
+pub struct Scripting {
+    /// Compile-key of the Rhai script that drives this object: a name in
+    /// [`World::scripts`](crate::world::World::scripts) for a hand-authored object,
+    /// or a synthetic `BUILTIN_*` name set when a script-backed archetype is
+    /// expanded (see [`builtin_script`](ObjectDef::builtin_script)). `None` means
+    /// this object has no script yet.
+    pub script_name: Option<String>,
+    /// Embedded built-in script source, set when a script-backed archetype (e.g. a
+    /// `pusher_*` or `gem`) is expanded into an object at load time (see
+    /// [`crate::builtin_scripts`]). When set, this is the object's script *source*
+    /// (its compile-key is the synthetic `BUILTIN_*` [`script_name`](ObjectDef::script_name)
+    /// the same expansion assigns). Not part of the map file — it is regenerated
+    /// from the archetype on load.
+    pub builtin_script: Option<&'static str>,
+    /// Open-ended string labels for this object. Serialized as a TOML array;
+    /// not subject to any rate limit — mutations take effect immediately after
+    /// the frame's action queue is drained.
+    pub tags: HashSet<String>,
+    /// Optional unique human-readable name for this object. `None` if unnamed.
+    /// Names are validated for uniqueness at map-load time; a duplicate name is
+    /// cleared to `None` (the object survives but becomes anonymous).
+    pub name: Option<String>,
+    /// The output queue of actions for this object
+    pub queue: ObjQueue,
+}
+
+/// A `Sensor` is some kind of object that exists alongside the map: it's drawn on the board but can't
+/// affect board movement, as it doesn't live in the grid.
+#[derive(Serialize, Deserialize, Clone)]
+pub struct Sensor {
+    /// The unique ID of this sensor
+    pub id: ObjectId,
+    /// Where it is on the board: x coord
+    pub x: usize,
+    /// Where it is on the board: y coord
+    pub y: usize,
+    /// What it looks like
+    pub glyph: Glyph,
+    /// Sensors interact with FOV and lighting
+    pub optics: Optics,
+    /// Sensors have scripting ability
+    #[serde(skip)]
+    pub scripting: Scripting,
+}

kiln-core/src/utils.rs

@@ -5,15 +5,18 @@ use crate::archetype::Archetype;
 use crate::glyph::Glyph;
 use color::Rgba8;
 use rhai::Dynamic;
+use serde::{Deserialize, Serialize};
 use crate::Board;
 use crate::log::LogLine;
+use crate::tile::EnterResponse;
 
 /// Which directions a solid may be pushed in.
 ///
 /// Only meaningful for `solid` cells (a non-solid cell is passable, so nothing is
 /// ever pushed into it). `Crate` is [`Pushable::Any`]; the directional crates
 /// constrain pushes to one axis.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
 pub enum Pushable {
     /// Cannot be pushed.
     No,
@@ -61,6 +64,9 @@ pub struct Behavior {
     /// the thing is expected to remove itself via `die()`). Only meaningful when
     /// `solid`. The same grab fires if the thing is pushed into the player.
     pub grab: bool,
+    /// The radius of light this emits, if any. Light _color_ is determined by the
+    /// glyph foreground color of whatever it is.
+    pub glow: u32,
 }
 
 /// A stable, unique identifier for a board object.
@@ -133,6 +139,7 @@ impl Solid {
                 opaque: true,
                 pushable: Pushable::Any,
                 grab: false,
+                glow: 6 // TODO player should not inherently glow, but glowing inventory items need to wait for inventory
             },
         }
     }
@@ -185,18 +192,22 @@ impl Solid {
 
     /// Which directions the occupant may be pushed (the player → [`Pushable::Any`]).
     pub fn pushable(&self) -> Pushable {
-        self.behavior.pushable
+        if let EnterResponse::Push(p) = EnterResponse::from(self.behavior) {
+            p
+        } else {
+            Pushable::No
+        }
     }
 
     /// Whether this occupant is a **grab** thing (a gem-like solid the player
     /// collects on contact). The player is never grabbable.
     pub fn grab(&self) -> bool {
-        self.behavior.grab
+        EnterResponse::from(self.behavior) == EnterResponse::Grab
     }
 
     /// Whether this occupant blocks movement (always true for a `Solid`).
     pub fn solid(&self) -> bool {
-        self.behavior.solid
+        EnterResponse::from(self.behavior) == EnterResponse::Block
     }
 
     /// Whether this occupant blocks line of sight.

kiln-core/src/world.rs

@@ -134,6 +134,7 @@ mod tests {
     use std::cell::RefCell;
     use std::collections::HashMap;
     use std::rc::Rc;
+    use crate::Builtin;
 
     /// A `deep_clone`d world owns independent boards: mutating the copy must leave the
     /// original board untouched (the property the editor's playtest relies on).
@@ -155,14 +156,14 @@ mod tests {
         copy.boards["start"].borrow_mut().place_archetype(
             1,
             0,
-            Archetype::Wall,
+            Archetype::Builtin(Builtin::Wall, "wall"),
-            Archetype::Wall.default_glyph(),
+            Builtin::Wall.default_glyph_for("wall"),
         );
 
         // The copy changed; the original is still empty at that cell.
         assert_eq!(
             copy.boards["start"].borrow().get(1, 0).1,
-            Archetype::Wall
+            Archetype::Builtin(Builtin::Wall, "wall")
         );
         assert_eq!(
             world.boards["start"].borrow().get(1, 0).1,

kiln-tui/src/editor.rs

@@ -20,7 +20,7 @@ use kiln_core::game::GameState;
 use kiln_core::glyph::Glyph;
 use kiln_core::log::LogLine;
 use kiln_core::world::World;
-use kiln_core::{Archetype, Board};
+use kiln_core::{Archetype, Board, Builtin};
 use kiln_ui::code_editor::{CodeEditor, CodeEditorOutcome};
 use kiln_ui::dialog::{Dialog, DialogResult, ListDialogResponse};
 use ratatui::Frame;
@@ -112,8 +112,8 @@ impl EditorState {
             code_editor: None,
             glyph_dialog: None,
             cursor,
-            current_archetype: Archetype::Wall,
+            current_archetype: Archetype::Builtin(Builtin::Wall, "wall"),
-            current_glyph: Archetype::Wall.default_glyph(),
+            current_glyph: Builtin::Wall.default_glyph_for("wall"),
             draw_mode: false,
             sidebar_width: DEFAULT_SIDEBAR_WIDTH,
             blink_on: true,

kiln-tui/src/editor_menu.rs

@@ -77,10 +77,10 @@ impl MenuLevel {
                 MenuEntry::item('c', "Custom glyph [TODO]", |_| {}),
             ],
             MenuLevel::Terrain => vec![
-                MenuEntry::item('w', "Wall", |ed| ed.set_current(Archetype::Wall)),
+                MenuEntry::item('w', "Wall", |ed| ed.set_current(Archetype::Builtin(Builtin::Wall, "wall"))),
-                MenuEntry::item('c', "■ Crate", |ed| ed.set_current(Archetype::Crate)),
+                MenuEntry::item('c', "■ Crate", |ed| ed.set_current(Archetype::Builtin(Builtin::Crate, "crate"))),
-                MenuEntry::item('v', "↕ Crate", |ed| ed.set_current(Archetype::VCrate)),
+                MenuEntry::item('v', "↕ Crate", |ed| ed.set_current(Archetype::Builtin(Builtin::VCrate, "vcrate"))),
-                MenuEntry::item('h', "↔ Crate", |ed| ed.set_current(Archetype::HCrate)),
+                MenuEntry::item('h', "↔ Crate", |ed| ed.set_current(Archetype::Builtin(Builtin::HCrate, "hcrate"))),
             ],
             MenuLevel::Machines => vec![
                 MenuEntry::item('p', "Pushers...", |ed| ed.menu.push(MenuLevel::Pushers)),