Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting

• @codex fix this CI failure
• @codex address that feedback

crates/grida-canvas/src/io/io_figma.rs (1)

49-105: Duplicate paint conversion logic

You have both impl From<&FigmaPaint> for Paint and FigmaConverter::convert_paint with diverging behavior (e.g., image URL mapping). Prefer a single source of truth to avoid drift.

• Keep only FigmaConverter::convert_paint (uses image URL remapping) and delete the impl From<&FigmaPaint>; or
• Make the impl delegate to a shared helper used by both.

Also applies to: 310-371

crates/grida-canvas/src/resources/mod.rs (1)

125-148: Broaden image extraction and deduplicate results

Currently only Rectangle nodes are inspected and URLs may repeat. Consider scanning all node types with paints and dedup via HashSet.

Example minimal dedup:

 pub fn extract_image_urls(scene: &Scene) -> Vec<String> {
-    let mut urls = Vec::new();
+    use std::collections::HashSet;
+    let mut urls = HashSet::new();
     for (id, _) in scene.graph.iter() {
         if let Ok(n) = scene.graph.get_node(id) {
-            if let crate::node::schema::Node::Rectangle(rect) = n {
+            if let crate::node::schema::Node::Rectangle(rect) = n {
                 for fill in &rect.fills {
                     if let Paint::Image(img) = fill {
                         match &img.image {
-                            ResourceRef::RID(r) | ResourceRef::HASH(r) => urls.push(r.clone()),
+                            ResourceRef::RID(r) | ResourceRef::HASH(r) => { urls.insert(r.clone()); },
                         }
                     }
                 }
                 for stroke in &rect.strokes {
                     if let Paint::Image(img) = stroke {
                         match &img.image {
-                            ResourceRef::RID(r) | ResourceRef::HASH(r) => urls.push(r.clone()),
+                            ResourceRef::RID(r) | ResourceRef::HASH(r) => { urls.insert(r.clone()); },
                         }
                     }
                 }
             }
         }
     }
-    urls
+    urls.into_iter().collect()
 }

Optionally, extract paints from other node types too (Ellipse, Rectangle, Vector paths, etc.) to catch all images.

crates/grida-canvas/examples/bench_100k.rs (1)

85-89: Clamp and round HSV→RGB conversion to avoid truncation artifacts

Casting f32→u8 truncates. Clamp to [0,1] and round for better color fidelity.

-    (
-        ((r + m) * 255.0) as u8,
-        ((g + m) * 255.0) as u8,
-        ((b + m) * 255.0) as u8,
-    )
+    (
+        (255.0 * (r + m).clamp(0.0, 1.0)).round() as u8,
+        (255.0 * (g + m).clamp(0.0, 1.0)).round() as u8,
+        (255.0 * (b + m).clamp(0.0, 1.0)).round() as u8,
+    )

crates/grida-canvas/examples/grida_paint.rs (1)

42-45: Avoid repeated clones of parent id

If NodeId is cheap (Copy) prefer passing directly; if not, bind once:

let parent = Parent::NodeId(root_container_id.clone());
// reuse `parent.clone()` in each append_child

Based on learnings

Also applies to: 79-82, 117-120, 146-149, 188-191, 231-234

crates/grida-canvas/examples/grida_shapes.rs (1)

45-46: Reduce Parent::NodeId cloning

Bind once and reuse to cut allocs if NodeId is not Copy:

let parent = Parent::NodeId(root_container_id.clone());
// use parent.clone() in loops

Based on learnings

Also applies to: 63-64, 91-92, 111-112, 138-139, 159-160, 181-182

crates/grida-canvas/examples/grida_vector.rs (2)

28-53: Avoid manual ids; prefer factory helpers to ensure validity/uniqueness

VectorNodeRec instances set id = "1", "2", etc. If SceneGraph or downstream relies on unique ids, hardcoding risks collisions. Prefer NodeFactory (if available) to create Vector nodes with generated ids or let the graph assign.

I can draft a helper that builds VectorNodeRec with a generated id and sane defaults; want that?

Also applies to: 58-84, 90-116, 121-147, 153-181, 190-221, 227-253, 262-292, 298-330

---

151-151: Leftover FIXME indicates broken shape; can help debug

The closed segment ab(3,0) “not working” likely needs a region defined for fill, or consistent winding/order. If desired, share the VectorNetwork semantics and I’ll propose a fix.

Also applies to: 166-171

crates/grida-canvas/examples/grida_blendmode.rs (1)

1-1: Top-level FIXME: broken demo

If this is intentionally broken, consider moving under golden_ or gating with a cargo feature to avoid confusing users.

crates/grida-canvas/src/painter/geometry.rs (1)

246-262: Traversal via SceneGraph is correct; consider minor robustness and perf tweaks

• Preallocate: reserve capacity for shapes_with_ops from children.len() to reduce reallocs.
• Inversion fallback: using identity on non-invertible transforms can produce incorrect results. Consider skipping such children or bailing out.

Proposed diff:

-    let mut shapes_with_ops = Vec::new();
-
-    let children = graph.get_children(&node.id)?;
+    let children = graph.get_children(&node.id)?;
+    if children.is_empty() {
+        return None;
+    }
+    let mut shapes_with_ops = Vec::with_capacity(children.len());
@@
-            let relative = inv.compose(&child_world);
+            // If inversion failed above and returned identity, consider skipping to avoid wrong transforms.
+            let relative = inv.compose(&child_world);

If you prefer skipping on inversion failure, replace the earlier unwrap_or_else(AffineTransform::identity) with an early return or conditional skip for that child.

crates/grida-canvas/tests/scene_cache.rs (1)

63-68: Layer ordering assumption may be brittle

Assertions rely on rect layer preceding container. If painter changes ordering (z-order, stable sort), this test could flap. Consider asserting set membership or documenting the ordering contract.

crates/grida-canvas/src/cache/geometry.rs (1)

232-260: Clarify container bounds semantics (own vs union)

Entry.absolute_bounding_box stores the container’s own bounds, while the function returns union_world_bounds (own ∪ children). Groups store union into the entry. If intentional (container represents its own shape for culling/hit‑test), please add a short comment; otherwise consider storing union in the entry for consistency.

crates/grida-canvas/examples/grida_shapes_ellipse.rs (1)

27-43: Optional: batch appends per row to reduce overhead

Collect nodes then use append_children once per row to lower per-call overhead (repeat for other rows).

crates/grida-canvas/src/dummy/mod.rs (1)

63-83: Benchmark: consider chunked appends or preallocation

For large grids, build a Vec per row (or full scene) and call append_children to reduce repeated insert overhead. Optionally reserve Vec capacity: (rows*cols) to avoid reallocations.

crates/grida-canvas/src/node/schema.rs (1)

97-107: UnknownNodeProperties.children vs SceneGraph

This still exposes children even though hierarchy lives in SceneGraph. If only for IO/back-compat, annotate that, or plan deprecation to avoid confusion.

crates/grida-canvas/examples/app_grida.rs (2)

44-71: Snapshot → SceneGraph construction: add child filtering and handle unknown IDs

Current build skips scene nodes as parents, but child lists may still reference scene or unknown node IDs. If SceneGraph::new_from_snapshot doesn’t sanitize, consider filtering children to existing, non‑scene nodes to avoid dangling edges.

Example tweak before calling new_from_snapshot:

-    let filtered_links: std::collections::HashMap<String, Vec<String>> = links
+    let node_ids: std::collections::HashSet<String> =
+        nodes.iter().map(|n| n.id().to_string()).collect();
+    let filtered_links: std::collections::HashMap<String, Vec<String>> = links
         .into_iter()
         .filter(|(parent_id, _)| !scene_node_ids.contains(parent_id))
-        .filter_map(|(parent_id, children_opt)| children_opt.map(|children| (parent_id, children)))
+        .filter_map(|(parent_id, children_opt)| {
+            children_opt.map(|children| {
+                let children = children
+                    .into_iter()
+                    .filter(|c| node_ids.contains(c))
+                    .collect::<Vec<_>>();
+                (parent_id, children)
+            })
+        })
         .collect();

---

71-75: Use parsed background color when available

You extract the scene background color but then ignore it and hardcode a gray. Prefer the parsed value with a sensible fallback.

Apply:

-    Scene {
-        name: scene_name,
-        background_color: Some(CGColor(230, 230, 230, 255)),
-        graph,
-    }
+    Scene {
+        name: scene_name,
+        background_color: _bg_color.or(Some(CGColor(230, 230, 230, 255))),
+        graph,
+    }

Additionally, rename _bg_color to bg_color above to avoid the leading underscore since it’s now used:

-    let (scene_name, _bg_color) = if let Some(cg::io::io_grida::JSONNode::Scene(scene_node)) =
+    let (scene_name, bg_color) = if let Some(cg::io::io_grida::JSONNode::Scene(scene_node)) =
         canvas_file.document.nodes.get(&scene_id)

crates/grida-canvas/src/runtime/scene.rs (1)

66-80: Guard DFS against cycles; avoid potential stack overflow

collect_scene_font_families uses recursive DFS without a visited set. If malformed graphs or future features introduce cycles, this can recurse infinitely. Add a visited set to make traversal robust.

Apply:

-fn collect_scene_font_families(scene: &Scene) -> HashSet<String> {
-    fn walk(id: &NodeId, graph: &SceneGraph, set: &mut HashSet<String>) {
+fn collect_scene_font_families(scene: &Scene) -> HashSet<String> {
+    fn walk(
+        id: &NodeId,
+        graph: &SceneGraph,
+        set: &mut HashSet<String>,
+        visited: &mut HashSet<NodeId>,
+    ) {
+        if !visited.insert(id.clone()) {
+            return;
+        }
         if let Ok(node) = graph.get_node(id) {
             match node {
                 Node::TextSpan(n) => {
                     set.insert(n.text_style.font_family.clone());
                 }
                 _ => {}
             }
         }
-        if let Some(children) = graph.get_children(id) {
-            for child in children {
-                walk(child, graph, set);
-            }
-        }
+        if let Some(children) = graph.get_children(id) {
+            for child in children {
+                walk(child, graph, set, visited);
+            }
+        }
     }
 
     let mut set = HashSet::new();
-    for id in scene.graph.roots() {
-        walk(&id, &scene.graph, &mut set);
+    let mut visited = HashSet::new();
+    for id in scene.graph.roots() {
+        walk(&id, &scene.graph, &mut set, &mut visited);
     }
     set
 }

Also applies to: 83-85

crates/grida-canvas/tests/geometry_cache.rs (1)

15-15: Avoid cloning the whole graph in tests

You clone the graph solely to keep node_count() available after moving it into Scene. Capture the count first and move the original graph to avoid the clone.

Apply:

-    let scene = Scene {
+    let node_count = graph.node_count();
+    let scene = Scene {
         name: "test".into(),
         background_color: None,
-        graph: graph.clone(),
+        graph,
     };
@@
-    assert_eq!(cache.len(), graph.node_count());
+    assert_eq!(cache.len(), node_count);

Also applies to: 23-30, 31-41

crates/grida-canvas/examples/grida_effects.rs (1)

3-3: LGTM overall; reduce repeated clones of root parent (optional)

Migration to SceneGraph looks correct. To cut repeated String clones in append_child calls, reuse a Parent enum instance for the root container.

Example:

let parent_root = Parent::NodeId(root_container_id.clone());
// ...
graph.append_child(Node::Rectangle(rect), parent_root.clone());
// repeat with parent_root.clone()

For further ergonomics, consider small helpers to spawn a shape with effects at (x, y).

Also applies to: 10-11, 20-21, 45-48, 67-71, 91-95, 110-114, 146-149, 168-171, 187-190, 213-216, 235-239, 305-308, 365-368, 374-375

crates/grida-canvas/src/window/application.rs (2)

9-9: Remove unused import

Parent isn’t used in this file. Drop it to keep warnings clean.

-use crate::node::scene_graph::{Parent, SceneGraph};
+use crate::node::scene_graph::SceneGraph;

---

289-289: Avoid unnecessary String allocation when getting a node

&id.to_string() allocates. Prefer passing &str if supported by get_node, or add an overload taking &str.

-            if let Ok(node) = scene.graph.get_node(&id.to_string()) {
+            if let Ok(node) = scene.graph.get_node(id) {

If get_node doesn’t accept &str, consider adding pub fn get_node_str(&self, id: &str) in SceneGraph and use it here. [Based on learnings]

crates/grida-canvas/examples/grida_images.rs (1)

3-3: SceneGraph migration LGTM; handle image load errors

Graph composition and Scene.graph wiring look correct.

Avoid unwrap() on network image fetch to keep the demo resilient offline or on transient failures (log and fallback).

-    let bytes = load_image(&image_url).await.unwrap();
+    let bytes = match load_image(&image_url).await {
+        Ok(b) => b,
+        Err(e) => {
+            eprintln!("failed to load demo image ({}): {}", &image_url, e);
+            Vec::new() // or early-return a simpler scene without image paints
+        }
+    };

Note: If you fallback to empty bytes, associated RID won’t be registered; consider guarding renderer.add_image(&bytes) accordingly.

Also applies to: 237-256, 261-261

crates/grida-canvas/examples/grida_booleans.rs (2)

1-2: Address FIXME or rename the demo

Header says “broken demo”. If intended to move under golden_*, rename and update references, or remove the FIXME to avoid confusion. I can help with a follow-up PR.

---

12-12: Boolean ops composition via SceneGraph is correct; small ergonomic tweak

The append sequence (boolean node → operands as children → description text to root) is sound.

To reduce repeated allocations, cache the root parent once:

-    let root_container_id = graph.append_child(Node::Container(root_container_node), Parent::Root);
+    let root_container_id = graph.append_child(Node::Container(root_container_node), Parent::Root);
+    let root_parent = Parent::NodeId(root_container_id.clone());
...
-        let bool_id = graph.append_child(
-            Node::BooleanOperation(bool_node),
-            Parent::NodeId(root_container_id.clone()),
-        );
+        let bool_id = graph.append_child(Node::BooleanOperation(bool_node), root_parent.clone());
...
-        graph.append_child(Node::TextSpan(text), Parent::NodeId(root_container_id.clone()));
+        graph.append_child(Node::TextSpan(text), root_parent.clone());

Also applies to: 22-22, 77-89, 142-156, 210-221, 276-287, 293-293

crates/grida-canvas/examples/grida_nested.rs (1)

16-21: Prefer usize for counts/indices

levels as usize is idiomatic and removes some casts in ranges/enumeration.

-    let levels: i32 = 6; // Number of nesting levels
+    let levels: usize = 6; // Number of nesting levels

Note: keep powi() using i32 via i as i32 where needed.

crates/grida-canvas/examples/grida_webfonts.rs (1)

127-146: Graph build is correct; consider batching top-level appends

Replace two append_child calls for heading/description with a single append_children for micro-efficiency and clarity.

-    graph.append_child(
-        Node::TextSpan(heading_node),
-        Parent::NodeId(root_container_id.clone()),
-    );
-    graph.append_child(
-        Node::TextSpan(description_node),
-        Parent::NodeId(root_container_id.clone()),
-    );
+    graph.append_children(
+        vec![Node::TextSpan(heading_node), Node::TextSpan(description_node)],
+        Parent::NodeId(root_container_id.clone()),
+    );

Optionally, batch the Albert Sans nodes similarly by collecting into a Vec and one append_children call.

crates/grida-canvas/src/node/scene_graph.rs (1)

136-143: Consider optimizing append_children to reduce allocations.

The current implementation clones parent on each iteration and calls append_child in a loop, which performs incremental updates to the links map.

Apply this diff to batch the parent updates:

 pub fn append_children(&mut self, nodes: Vec<Node>, parent: Parent) -> Vec<NodeId> {
-    let mut ids = Vec::new();
+    let mut ids = Vec::with_capacity(nodes.len());
+    
     for node in nodes {
-        let id = self.append_child(node, parent.clone());
+        let id = self.nodes.insert(node);
         ids.push(id);
     }
+    
+    match parent {
+        Parent::Root => {
+            self.roots.extend(ids.clone());
+        }
+        Parent::NodeId(parent_id) => {
+            self.links
+                .entry(parent_id)
+                .or_insert_with(Vec::new)
+                .extend(ids.clone());
+        }
+    }
+    
     ids
 }

crates/grida-canvas/examples/grida_fills.rs (1)

41-41: Consider reducing allocations by reusing Parent.

Each append_child call clones root_id to construct Parent::NodeId(root_id.clone()). For clarity in examples this is fine, but in performance-critical code you could factor out the parent:

let parent = Parent::NodeId(root_id.clone());
// Then use &parent or parent.clone() as needed
graph.append_child(Node::Rectangle(multi_solid_rect), parent.clone());

This is a nitpick for example code and does not require changes.

Also applies to: 72-72, 107-107, 155-155, 216-216, 271-271, 334-334, 369-369

crates/grida-canvas/examples/grida_strokes.rs (1)

53-56: Repetitive parent construction is acceptable for example clarity.

While each append_child call clones root_id to construct the parent, this pattern is clear and readable for example code. In performance-critical paths, consider factoring out the parent as noted in other files.

Also applies to: 77-80, 97-100, 113-116, 130-133, 148-151

crates/grida-canvas/examples/grida_mask.rs (1)

8-59: LGTM! Helper function migrated correctly.

The function signature and implementation correctly:

• Accept &mut SceneGraph and Parent parameters
• Use graph.append_child() to add nodes
• Return Vec<NodeId> for the created content

The parent.clone() on lines 28, 40, and 56 is a minor inefficiency but acceptable for helper functions. You could pass &Parent and clone only when needed, but this is optional.

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas/AGENTS.md:0-0
Timestamp: 2025-09-26T09:30:18.313Z
Learning: Applies to crates/grida-canvas/**/*.rs : Use the math2 crate for geometry and common math operations

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas/AGENTS.md:0-0
Timestamp: 2025-09-26T09:30:18.313Z
Learning: Applies to crates/grida-canvas/**/*.rs : Use the skia-safe crate for all painting in the 2D real-time rendering engine

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas-fonts/AGENTS.md:0-0
Timestamp: 2025-09-15T10:31:32.864Z
Learning: Applies to crates/grida-canvas-fonts/**/Cargo.toml : Declare ttf-parser = "0.25" as a required dependency for the fonts crate

crates/grida-canvas/examples/golden_container_stroke.rs (1)

9-47: LGTM! Clean SceneGraph migration.

The scene construction correctly:

• Creates a SceneGraph instance (line 11)
• Adds the container as a root node (line 39)
• Adds the circle as a child of the container using the returned ID (line 40)
• Returns a Scene with the graph field (line 44)

This pattern is consistent with the SceneGraph-based approach demonstrated in other examples.

Minor note: The comment on lines 33-36 mentions positioning the circle at "right-bottom" but the actual coordinates (200.0, 200.0) position it at the same location as the container, which appears to center it. Since this is a golden test for stroke behavior, the positioning is likely intentional.

crates/grida-canvas/examples/grida_nested.rs (4)

12-15: Comment/code mismatch: “scale” not applied via transform.

You only set translation + rotation; size drives visual downsizing. Either apply transform scale (if supported) or adjust the comment.

If AffineTransform supports scaling (e.g., set_scale or similar), do you intend to use it here?

---

25-25: Remove redundant cast in powi.

i is already i32 here.

-        let current_size = base_size * size_reduction.powi(i as i32);
+        let current_size = base_size * size_reduction.powi(i);

---

32-38: Rotation pivot/centering may not match intent.

AffineTransform::new sets translation then rotation (rotation about origin). If you intend rotation about the container’s center or true centering in parent, extra offset/pivot handling is needed; current 7.5% offset is not “centered.”

Confirm intended pivot and whether additional translate-to-center/translate-back (or a pivot field) is needed. Based on relevant snippet in math2::transform::new.

---

57-65: Avoid empty font family to reduce platform variance.

Passing "" may trigger unpredictable fallback. Prefer a known default family available in your font loader, or document the fallback.

Is there a canonical default (e.g., Inter/Roboto/Noto) in this repo’s font pipeline?

crates/grida-canvas/examples/grida_fills.rs (1)

20-21: Looks good; minor ergonomics

Repeated Parent::NodeId(root_id.clone()) allocations. Consider caching parent once or using append_children like in golden_pdf for brevity and fewer clones.

Also applies to: 41-42, 72-73, 107-108, 155-156, 216-217, 271-272, 334-335, 369-370

crates/grida-canvas/src/io/io_figma.rs (1)

4-5: Remove unused import

Parent is unused here.

-use crate::node::scene_graph::{Parent, SceneGraph};
+use crate::node::scene_graph::SceneGraph;

crates/grida-canvas/examples/grida_vector.rs (1)

3-3: SceneGraph migration looks good

Construction and parenting via SceneGraph/Parent are correct and consistent with the new model.

Minor nits (optional):

• IDs are hardcoded strings; consider Uuid/NodeFactory to avoid collisions in larger demos.
• Repeating Parent::NodeId(root_id.clone()) is fine; if it grows, a small helper for “append_to(root_id, node)” can reduce noise.

Also applies to: 11-11, 21-21, 54-55, 85-86, 117-118, 148-149, 182-183, 222-223, 254-255, 293-294, 330-331, 337-338

crates/grida-canvas/src/dummy/mod.rs (1)

2-6: LGTM on graph‑based dummy scenes

SceneGraph population via append_children/append_child is correct; background color change is fine.

Nit (optional): import math2::transform::AffineTransform at top to avoid repeating fully‑qualified paths.

Also applies to: 39-47, 51-53, 59-60, 81-82, 87-89

crates/grida-canvas/src/runtime/scene.rs (1)

65-87: Skip inactive nodes when collecting fonts

Consider ignoring nodes with active == false to avoid requesting unused fonts.

-        if let Ok(node) = graph.get_node(id) {
+        if let Ok(node) = graph.get_node(id) {
             match node {
-                Node::TextSpan(n) => {
+                Node::TextSpan(n) if n.active => {
                     set.insert(n.text_style.font_family.clone());
                 }
                 _ => {}
             }
         }

crates/grida-canvas/examples/grida_shapes.rs (2)

26-28: Reduce clone noise by caching parent

Create a reusable root_parent and use it at append sites.

Apply this diff:

 // Set up the root container first
 let root_container_id = graph.append_child(Node::Container(root_container_node), Parent::Root);
+let root_parent = Parent::NodeId(root_container_id.clone());

-graph.append_child(Node::Rectangle(rect), Parent::NodeId(root_container_id.clone()));
+graph.append_child(Node::Rectangle(rect), root_parent.clone());

-graph.append_child(Node::Ellipse(ellipse), Parent::NodeId(root_container_id.clone()));
+graph.append_child(Node::Ellipse(ellipse), root_parent.clone());

-graph.append_child(Node::Polygon(polygon), Parent::NodeId(root_container_id.clone()));
+graph.append_child(Node::Polygon(polygon), root_parent.clone());

-graph.append_child(Node::RegularPolygon(regular_polygon), Parent::NodeId(root_container_id.clone()));
+graph.append_child(Node::RegularPolygon(regular_polygon), root_parent.clone());

-graph.append_child(Node::SVGPath(path), Parent::NodeId(root_container_id.clone()));
+graph.append_child(Node::SVGPath(path), root_parent.clone());

-graph.append_child(Node::RegularStarPolygon(star), Parent::NodeId(root_container_id.clone()));
+graph.append_child(Node::RegularStarPolygon(star), root_parent.clone());

-graph.append_child(Node::Ellipse(arc), Parent::NodeId(root_container_id.clone()));
+graph.append_child(Node::Ellipse(arc), root_parent.clone());

Also applies to: 45-46, 63-64, 91-92, 111-112, 139-139, 159-160, 181-182

---

38-41: Clamp corner radius to avoid degenerate geometry

Large radii can exceed half the side on an 80×80 rect. Clamp to base_size * 0.5.

Apply this diff:

-        rect.corner_radius = RectangularCornerRadius::circular(0.0 + (i as f32 * 8.0)); // 0 to 72
+        let max_radius = base_size * 0.5;
+        rect.corner_radius =
+            RectangularCornerRadius::circular(((i as f32) * 8.0).min(max_radius));

crates/grida-canvas/examples/grida_image.rs (1)

35-37: Remove unnecessary String clones

Avoid cloning hash_str and url; move them.

Apply this diff:

-    let url = format!("res://images/{}", hash_str.clone());
-    rect1.set_fill(Paint::Image(ImagePaint {
-        image: ResourceRef::RID(url.clone()),
+    let url = format!("res://images/{}", hash_str);
+    rect1.set_fill(Paint::Image(ImagePaint {
+        image: ResourceRef::RID(url),

crates/grida-canvas/examples/grida_booleans.rs (1)

77-89: Factor repetitive boolean-op assembly into a helper

The union/intersection/difference/XOR blocks repeat the same wiring. Extract a small helper that takes op, shapes, y_offset, and label to reduce duplication.

Example signature:

• fn add_bool_demo(graph: &mut SceneGraph, parent: NodeId, op: BooleanPathOperation, shapes: Vec, text: TextSpanNodeRec)

Also applies to: 144-156, 210-221, 276-287

crates/grida-canvas/examples/grida_paint.rs (1)

42-46: Reduce repeated clones of parent for readability (optional).

Bind once and reuse:

• let parent = Parent::NodeId(root_container_id.clone());
• Use parent.clone() in each append if needed.

Applies to all subsequent Parent::NodeId(root_container_id.clone()) occurrences.

crates/grida-canvas/benches/bench_rectangles.rs (1)

13-21: Minor micro-optimization (optional).

Avoid a temporary id binding since it’s used once:

-            let id = format!("rect-{}", i);
-
-            Node::Rectangle(RectangleNodeRec {
-                id: id.clone(),
+            Node::Rectangle(RectangleNodeRec {
+                id: format!("rect-{}", i),

crates/grida-canvas/tests/hit_test.rs (1)

106-109: Optional: reduce clones for parent id.

Bind once as let parent = Parent::NodeId(container_id.clone()); and reuse it across appends in this test.

crates/grida-canvas/examples/grida_strokes.rs (1)

53-56: Batch node inserts to reduce clones and calls

Within loops, collect nodes and use append_children once per row. This avoids repeated Parent::NodeId(root_container_id.clone()) and multiple graph mutations.

Also applies to: 77-80, 97-100, 113-116, 130-133, 148-151, 190-193, 223-226, 258-261, 290-293, 326-329, 344-347, 368-371, 403-406, 452-455, 506-509

crates/grida-canvas/examples/grida_shapes_ellipse.rs (1)

42-43: Batch per-row inserts

Collect each row’s nodes and call append_children once to reduce clones and graph churn.

Also applies to: 61-62, 81-82, 102-103, 122-123

crates/grida-canvas/examples/grida_images.rs (1)

12-13: Avoid unwrap on network IO in example

unwrap() will panic if image load fails. Prefer proper error handling or return a Result from demo_images, or at least log and early-return with a placeholder.

crates/grida-canvas/examples/app_grida.rs (1)

39-43: Simplify Option<Option<Vec>> handling

Use cloned().flatten() for clarity.

-    let scene_children = links
-        .get(&scene_id)
-        .and_then(|c| c.clone())
-        .unwrap_or_default();
+    let scene_children = links
+        .get(&scene_id)
+        .cloned()
+        .flatten()
+        .unwrap_or_default();

crates/grida-canvas/src/window/application.rs (1)

287-296: Avoid heap allocation on every get_node lookup

id.to_string() allocates per call. Consider extending SceneGraph API to accept &str (e.g., get_node_str(&str) or get_node<S: AsRef>), then call without allocation.

Would you like me to propose the SceneGraph API change and update call sites?

crates/grida-canvas/src/painter/geometry.rs (1)

256-279: Avoid Path ↔ PainterShape round-trips in boolean ops

You build PainterShape from Path only to convert back. Store Paths directly to reduce allocations.

-/// A merged `Path` representing the result of all boolean operations.
-/// If no shapes are provided, returns an empty path.
-pub fn merge_shapes(shapes: &[(PainterShape, BooleanPathOperation)]) -> Path {
+/// A merged `Path` representing the result of all boolean operations.
+/// If no shapes are provided, returns an empty path.
+pub fn merge_shapes(shapes: &[(Path, BooleanPathOperation)]) -> Path {
     if shapes.is_empty() {
         return Path::new();
     }
 
-    let mut result = shapes[0].0.to_path();
+    let mut result = shapes[0].0.clone();
 
     for (shape, operation) in shapes.iter().skip(1) {
-        let shape_path = shape.to_path();
-        if let Some(merged) = Path::op(&result, &shape_path, (*operation).into()) {
+        if let Some(merged) = Path::op(&result, shape, (*operation).into()) {
             result = merged;
         }
     }
 
     result
 }

-    let mut shapes_with_ops = Vec::new();
+    let mut shapes_with_ops: Vec<(Path, BooleanPathOperation)> = Vec::new();
@@
-            shapes_with_ops.push((PainterShape::from_path(path), op));
+            shapes_with_ops.push((path, op));

Also applies to: 208-223

crates/grida-canvas/examples/grida_webfonts.rs (1)

127-146: Good graph assembly; batch the first two appends

Use append_children for heading/description to reduce repetition and clones.

Apply this diff:

-    // Add all text nodes to root container
-    graph.append_child(
-        Node::TextSpan(heading_node),
-        Parent::NodeId(root_container_id.clone()),
-    );
-    graph.append_child(
-        Node::TextSpan(description_node),
-        Parent::NodeId(root_container_id.clone()),
-    );
+    // Add heading and description to root container
+    graph.append_children(
+        vec![
+            Node::TextSpan(heading_node),
+            Node::TextSpan(description_node),
+        ],
+        Parent::NodeId(root_container_id.clone()),
+    );

crates/grida-canvas/examples/grida_effects.rs (1)

45-49: Reduce repeated Parent::NodeId clones

Optional: bind parent once to cut repetition and tiny allocations.

Example:

let parent = Parent::NodeId(root_container_id.clone());
// later
graph.append_child(Node::Rectangle(rect), parent.clone());

Also applies to: 67-71, 91-95, 110-114, 146-149, 167-171, 186-190, 213-216, 235-239, 305-309, 364-368

crates/grida-canvas/examples/grida_blendmode.rs (1)

1-1: Resolve the FIXME before merging or track it

The demo is flagged “broken”. Either fix here or open an issue and downgrade the comment to a TODO with a link.

crates/grida-canvas/src/painter/layer.rs (1)

552-556: Consistently filter invisible strokes for Line

Other branches use filter_visible_paints. Do the same here.

Apply this diff:

-                    strokes: n.strokes.clone(),
+                    strokes: Self::filter_visible_paints(&n.strokes),

crates/grida-canvas/src/node/scene_graph.rs (2)

296-323: Ancestor lookup is O(N²); consider a parent map

Optional: maintain parents: HashMap<NodeId, NodeId> to make get_parent/ancestors O(1)/O(h).

---

87-105: Validate snapshot integrity (optional)

Optionally assert that all roots and link targets exist in nodes to prevent dangling IDs.

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas-fonts/AGENTS.md:0-0
Timestamp: 2025-09-15T10:31:32.864Z
Learning: Applies to crates/grida-canvas-fonts/tests/ui_parser_test.rs : Place high-level UI API tests (parse_ui) in tests/ui_parser_test.rs

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas/AGENTS.md:0-0
Timestamp: 2025-09-26T09:30:18.313Z
Learning: Applies to crates/grida-canvas/**/*.rs : Use the math2 crate for geometry and common math operations

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas/AGENTS.md:0-0
Timestamp: 2025-09-26T09:30:18.313Z
Learning: Applies to crates/grida-canvas/**/*.rs : Use the skia-safe crate for all painting in the 2D real-time rendering engine

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas-fonts/AGENTS.md:0-0
Timestamp: 2025-09-15T10:31:32.864Z
Learning: Applies to crates/grida-canvas-fonts/**/Cargo.toml : Declare ttf-parser = "0.25" as a required dependency for the fonts crate

Learnt from: CR
PR: gridaco/grida#0
File: crates/grida-canvas-wasm/AGENTS.md:0-0
Timestamp: 2025-09-26T09:29:53.155Z
Learning: Applies to crates/grida-canvas-wasm/{crates/grida-canvas-wasm/src/main.rs,**/grida-canvas-wasm.d.ts} : When introducing new public APIs in the WASM entrypoint (main.rs), update the TypeScript declarations in grida-canvas-wasm.d.ts to keep bindings in sync