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new file mode 100644
index 0000000000..99daf9dc69
--- /dev/null
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diff --git a/tools/crate-hierarchy-viz/Cargo.toml b/tools/crate-hierarchy-viz/Cargo.toml
new file mode 100644
index 0000000000..90d02d554a
--- /dev/null
+++ b/tools/crate-hierarchy-viz/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "crate-hierarchy-viz"
+version = "0.1.0"
+edition = "2024"
+description = "Tool to visualize the crate hierarchy in the Graphite workspace"
+
+[workspace]
+members = ["."]
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+toml = "0.8"
+anyhow = "1.0"
+clap = { version = "4.5", features = ["derive"] }
diff --git a/tools/crate-hierarchy-viz/generate-crate-viz.sh b/tools/crate-hierarchy-viz/generate-crate-viz.sh
new file mode 100755
index 0000000000..38e5c0f7cc
--- /dev/null
+++ b/tools/crate-hierarchy-viz/generate-crate-viz.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+# Build the visualization tool if it doesn't exist
+if [ ! -f "tools/crate-hierarchy-viz/target/debug/crate-hierarchy-viz" ]; then
+    echo "Building crate hierarchy visualization tool..."
+    cargo build
+fi
+
+# Generate the DOT file
+echo "Generating crate hierarchy graph..."
+./target/debug/crate-hierarchy-viz --workspace ../.. --format dot --output crate-hierarchy.dot --exclude-dyn-any
+
+echo "Generating crate hierarchy graph (excluding dyn-any)..."
+./target/debug/crate-hierarchy-viz --workspace ../.. --format dot --exclude-dyn-any --output crate-hierarchy-no-dyn-any.dot
+
+# Generate visualizations if graphviz is available
+if command -v dot &> /dev/null; then
+    echo "Generating PNG visualizations..."
+    dot -Tpng crate-hierarchy.dot -o crate-hierarchy.png
+    dot -Tpng crate-hierarchy-no-dyn-any.dot -o crate-hierarchy-no-dyn-any.png
+
+    echo "Generating SVG visualizations..."
+    dot -Tsvg crate-hierarchy.dot -o crate-hierarchy.svg
+    dot -Tsvg crate-hierarchy-no-dyn-any.dot -o crate-hierarchy-no-dyn-any.svg
+
+    echo "Visualizations generated:"
+    echo "  - crate-hierarchy.dot (GraphViz DOT format)"
+    echo "  - crate-hierarchy.png (PNG image)"
+    echo "  - crate-hierarchy.svg (SVG image)"
+    echo "  - crate-hierarchy-no-dyn-any.dot (GraphViz DOT format, dyn-any excluded)"
+    echo "  - crate-hierarchy-no-dyn-any.png (PNG image, dyn-any excluded)"
+    echo "  - crate-hierarchy-no-dyn-any.svg (SVG image, dyn-any excluded)"
+else
+    echo "GraphViz not found. Generated DOT file only:"
+    echo "  - crate-hierarchy.dot"
+    echo "Install GraphViz to generate PNG/SVG visualizations"
+fi
diff --git a/tools/crate-hierarchy-viz/src/main.rs b/tools/crate-hierarchy-viz/src/main.rs
new file mode 100644
index 0000000000..d2bcd17108
--- /dev/null
+++ b/tools/crate-hierarchy-viz/src/main.rs
@@ -0,0 +1,339 @@
+use anyhow::{Context, Result};
+use clap::Parser;
+use serde::{Deserialize, Serialize};
+use std::collections::{HashMap, HashSet};
+use std::fs;
+use std::path::{Path, PathBuf};
+
+#[derive(Parser)]
+#[command(name = "crate-hierarchy-viz")]
+#[command(about = "Visualize the crate hierarchy in the Graphite workspace")]
+struct Args {
+    /// Workspace root directory (defaults to current directory)
+    #[arg(short, long)]
+    workspace: Option<PathBuf>,
+
+    /// Output format: dot, text
+    #[arg(short, long, default_value = "dot")]
+    format: String,
+
+    /// Output file (defaults to stdout)
+    #[arg(short, long)]
+    output: Option<PathBuf>,
+
+    /// Include external dependencies (workspace dependencies)
+    #[arg(long)]
+    include_external: bool,
+
+    /// Exclude dyn-any from the graph (it's used everywhere)
+    #[arg(long)]
+    exclude_dyn_any: bool,
+}
+
+#[derive(Debug, Deserialize)]
+struct WorkspaceToml {
+    workspace: WorkspaceConfig,
+}
+
+#[derive(Debug, Deserialize)]
+struct WorkspaceConfig {
+    members: Vec<String>,
+    dependencies: Option<HashMap<String, WorkspaceDependency>>,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(untagged)]
+enum WorkspaceDependency {
+    Simple(String),
+    Detailed {
+        path: Option<String>,
+        version: Option<String>,
+        workspace: Option<bool>,
+        #[serde(flatten)]
+        other: HashMap<String, toml::Value>,
+    },
+}
+
+#[derive(Debug, Deserialize)]
+struct CrateToml {
+    package: PackageConfig,
+    dependencies: Option<HashMap<String, CrateDependency>>,
+}
+
+#[derive(Debug, Deserialize)]
+struct PackageConfig {
+    name: String,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(untagged)]
+enum CrateDependency {
+    Simple(String),
+    Detailed {
+        path: Option<String>,
+        workspace: Option<bool>,
+        version: Option<String>,
+        optional: Option<bool>,
+        #[serde(flatten)]
+        other: HashMap<String, toml::Value>,
+    },
+}
+
+#[derive(Debug, Clone)]
+struct CrateInfo {
+    name: String,
+    path: PathBuf,
+    dependencies: Vec<String>,
+    external_dependencies: Vec<String>,
+}
+
+fn main() -> Result<()> {
+    let args = Args::parse();
+
+    let workspace_root = args.workspace.unwrap_or_else(|| std::env::current_dir().unwrap());
+    let workspace_toml_path = workspace_root.join("Cargo.toml");
+
+    // Parse workspace Cargo.toml
+    let workspace_content = fs::read_to_string(&workspace_toml_path)
+        .with_context(|| format!("Failed to read {:?}", workspace_toml_path))?;
+    let workspace_toml: WorkspaceToml = toml::from_str(&workspace_content)
+        .with_context(|| "Failed to parse workspace Cargo.toml")?;
+
+    // Get workspace dependencies (external crates defined at workspace level)
+    let workspace_deps: HashSet<String> = workspace_toml
+        .workspace
+        .dependencies
+        .unwrap_or_default()
+        .keys()
+        .cloned()
+        .collect();
+
+    // Parse each member crate and build name mapping
+    let mut crates = Vec::new();
+    let mut workspace_crate_names = HashSet::new();
+
+    // First pass: collect all workspace crate names
+    for member in &workspace_toml.workspace.members {
+        let crate_path = workspace_root.join(member);
+        let cargo_toml_path = crate_path.join("Cargo.toml");
+
+        if !cargo_toml_path.exists() {
+            eprintln!("Warning: Cargo.toml not found for member: {}", member);
+            continue;
+        }
+
+        let crate_content = fs::read_to_string(&cargo_toml_path)
+            .with_context(|| format!("Failed to read {:?}", cargo_toml_path))?;
+        let crate_toml: CrateToml = toml::from_str(&crate_content)
+            .with_context(|| format!("Failed to parse Cargo.toml for {}", member))?;
+
+        workspace_crate_names.insert(crate_toml.package.name.clone());
+    }
+
+    // Second pass: parse dependencies now that we know all workspace crate names
+    for member in &workspace_toml.workspace.members {
+        let crate_path = workspace_root.join(member);
+        let cargo_toml_path = crate_path.join("Cargo.toml");
+
+        if !cargo_toml_path.exists() {
+            continue;
+        }
+
+        let crate_content = fs::read_to_string(&cargo_toml_path)
+            .with_context(|| format!("Failed to read {:?}", cargo_toml_path))?;
+        let crate_toml: CrateToml = toml::from_str(&crate_content)
+            .with_context(|| format!("Failed to parse Cargo.toml for {}", member))?;
+
+        let mut dependencies = Vec::new();
+        let mut external_dependencies = Vec::new();
+
+        if let Some(deps) = &crate_toml.dependencies {
+            for (dep_name, dep_config) in deps {
+                let is_workspace_crate = workspace_crate_names.contains(dep_name);
+                let is_workspace_dep = workspace_deps.contains(dep_name);
+
+                let is_local_dep = match dep_config {
+                    CrateDependency::Detailed { workspace: Some(true), .. } => is_workspace_dep,
+                    CrateDependency::Detailed { path: Some(_), .. } => true,
+                    CrateDependency::Simple(_) => is_workspace_dep,
+                    _ => false,
+                };
+
+                // Check if this dependency has a different package name
+                let actual_dep_name = match dep_config {
+                    CrateDependency::Detailed { other, .. } => {
+                        // Check if there's a "package" field that renames the dependency
+                        if let Some(toml::Value::String(package_name)) = other.get("package") {
+                            package_name.clone()
+                        } else {
+                            dep_name.clone()
+                        }
+                    }
+                    _ => dep_name.clone(),
+                };
+
+                let is_actual_workspace_crate = workspace_crate_names.contains(&actual_dep_name);
+
+                if is_workspace_crate || is_actual_workspace_crate || is_local_dep {
+                    dependencies.push(actual_dep_name);
+                } else {
+                    external_dependencies.push(actual_dep_name);
+                }
+            }
+        }
+
+        crates.push(CrateInfo {
+            name: crate_toml.package.name.clone(),
+            path: crate_path,
+            dependencies,
+            external_dependencies,
+        });
+    }
+
+    // Filter dependencies to only include workspace crates
+    for crate_info in &mut crates {
+        crate_info.dependencies.retain(|dep| workspace_crate_names.contains(dep));
+    }
+
+    // Generate output
+    let output = match args.format.as_str() {
+        "dot" => generate_dot_format(&crates, args.include_external, args.exclude_dyn_any)?,
+        "text" => generate_text_format(&crates, args.include_external, args.exclude_dyn_any)?,
+        _ => anyhow::bail!("Unsupported format: {}", args.format),
+    };
+
+    // Write output
+    if let Some(output_path) = args.output {
+        fs::write(&output_path, output)
+            .with_context(|| format!("Failed to write to {:?}", output_path))?;
+        println!("Output written to: {:?}", output_path);
+    } else {
+        print!("{}", output);
+    }
+
+    Ok(())
+}
+
+fn generate_dot_format(crates: &[CrateInfo], include_external: bool, exclude_dyn_any: bool) -> Result<String> {
+    let mut output = String::new();
+    output.push_str("digraph CrateHierarchy {\n");
+    output.push_str("    rankdir=LR;\n");
+    output.push_str("    node [shape=box, style=\"rounded,filled\", fillcolor=lightblue];\n");
+    output.push_str("    edge [color=gray];\n\n");
+
+    // Add subgraphs for different categories
+    output.push_str("    subgraph cluster_core {\n");
+    output.push_str("        label=\"Core Components\";\n");
+    output.push_str("        style=filled;\n");
+    output.push_str("        fillcolor=lightgray;\n");
+
+    let core_crates: Vec<_> = crates.iter()
+        .filter(|c| c.name.starts_with("graphite-") || c.name == "editor")
+        .collect();
+
+    for crate_info in &core_crates {
+        output.push_str(&format!("        \"{}\";\n", crate_info.name));
+    }
+    output.push_str("    }\n\n");
+
+    output.push_str("    subgraph cluster_nodegraph {\n");
+    output.push_str("        label=\"Node Graph System\";\n");
+    output.push_str("        style=filled;\n");
+    output.push_str("        fillcolor=lightyellow;\n");
+
+    let nodegraph_crates: Vec<_> = crates.iter()
+        .filter(|c| c.name.starts_with("graphene-") ||
+                   c.name == "graph-craft" ||
+                   c.name == "interpreted-executor" ||
+                   c.name == "wgpu-executor" ||
+                   c.name == "node-macro" ||
+                   c.name == "preprocessor")
+        .collect();
+
+    for crate_info in &nodegraph_crates {
+        output.push_str(&format!("        \"{}\";\n", crate_info.name));
+    }
+    output.push_str("    }\n\n");
+
+    output.push_str("    subgraph cluster_libraries {\n");
+    output.push_str("        label=\"Libraries\";\n");
+    output.push_str("        style=filled;\n");
+    output.push_str("        fillcolor=lightgreen;\n");
+
+    let library_crates: Vec<_> = crates.iter()
+        .filter(|c| !c.name.starts_with("graphite-") &&
+                   !c.name.starts_with("graphene-") &&
+                   c.name != "graph-craft" &&
+                   c.name != "interpreted-executor" &&
+                   c.name != "wgpu-executor" &&
+                   c.name != "node-macro" &&
+                   c.name != "preprocessor" &&
+                   c.name != "editor")
+        .collect();
+
+    for crate_info in &library_crates {
+        output.push_str(&format!("        \"{}\";\n", crate_info.name));
+    }
+    output.push_str("    }\n\n");
+
+    // Add dependencies as edges
+    for crate_info in crates {
+        for dep in &crate_info.dependencies {
+            if exclude_dyn_any && dep == "dyn-any" {
+                continue;
+            }
+            output.push_str(&format!("    \"{}\" -> \"{}\";\n", crate_info.name, dep));
+        }
+
+        if include_external {
+            for dep in &crate_info.external_dependencies {
+                if exclude_dyn_any && dep == "dyn-any" {
+                    continue;
+                }
+                output.push_str(&format!("    \"{}\" -> \"{}\" [style=dashed, color=red];\n", crate_info.name, dep));
+            }
+        }
+    }
+
+    output.push_str("}\n");
+    Ok(output)
+}
+
+fn generate_text_format(crates: &[CrateInfo], include_external: bool, exclude_dyn_any: bool) -> Result<String> {
+    let mut output = String::new();
+    output.push_str("Graphite Workspace Crate Hierarchy\n");
+    output.push_str("==================================\n\n");
+
+    for crate_info in crates {
+        output.push_str(&format!("Crate: {}\n", crate_info.name));
+        output.push_str(&format!("Path: {}\n", crate_info.path.display()));
+
+        let filtered_deps: Vec<_> = crate_info.dependencies.iter()
+            .filter(|dep| !exclude_dyn_any || *dep != "dyn-any")
+            .collect();
+
+        if !filtered_deps.is_empty() {
+            output.push_str("Workspace Dependencies:\n");
+            for dep in filtered_deps {
+                output.push_str(&format!("  - {}\n", dep));
+            }
+        }
+
+        if include_external {
+            let filtered_external_deps: Vec<_> = crate_info.external_dependencies.iter()
+                .filter(|dep| !exclude_dyn_any || *dep != "dyn-any")
+                .collect();
+
+            if !filtered_external_deps.is_empty() {
+                output.push_str("External Dependencies:\n");
+                for dep in filtered_external_deps {
+                    output.push_str(&format!("  - {}\n", dep));
+                }
+            }
+        }
+
+        output.push_str("\n");
+    }
+
+    Ok(output)
+}
\ No newline at end of file