diff --git a/.mise.toml b/.mise.toml
index 0547868..0d10500 100644
--- a/.mise.toml
+++ b/.mise.toml
@@ -158,7 +158,7 @@ description = "Build the har1 workflow WASM module"
 dir = "services/ws-modules/har1"
 run = """
 wasm-pack build . --target web
-cargo run -p module-manifest-to-package-json
+cargo run -p et-cli -- module-package-json
 """
 
 [tasks.build-ws-face-detection-module]
@@ -166,7 +166,7 @@ description = "Build the face detection workflow WASM module"
 dir = "services/ws-modules/face-detection"
 run = """
 wasm-pack build . --target web
-cargo run -p module-manifest-to-package-json
+cargo run -p et-cli -- module-package-json
 """
 
 [tasks.build-ws-comm1-module]
@@ -235,7 +235,7 @@ description = "Build the pydata1 Python workflow module"
 dir = "services/ws-modules/pydata1"
 run = """
 uv build --wheel --out-dir pkg
-cargo run -p module-manifest-to-package-json
+cargo run -p et-cli -- module-package-json
 """
 
 [tasks.build-ws-pyface1-module]
@@ -243,7 +243,7 @@ description = "Build the pyface1 Python face detection workflow module"
 dir = "services/ws-modules/pyface1"
 run = """
 uv build --wheel --out-dir pkg
-cargo run -p module-manifest-to-package-json
+cargo run -p et-cli -- module-package-json
 """
 
 [tasks.build-ws-java-data1-module]
diff --git a/CLAUDE.md b/CLAUDE.md
index a34166d..8505c38 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -75,11 +75,11 @@ Languages:
 
 ### Utilities (`utilities/`)
 
-- **cli** (`et-cli`) — Deployment generator: reads scenario YAML, outputs `mise.toml` or `compose.yaml`
+- **cli** (`et-cli`) — Scenario and module tooling. Reads scenario YAML and outputs `mise.toml` or `compose.yaml`;
+  also generates module `pkg/package.json` files with `et-cli module-package-json`.
+  Deployment-specific generators live under `utilities/cli/src/deployment_types/`.
+  Module package JSON generation lives under `utilities/cli/src/module_package_json/`.
 - **onnx** — ONNX model utilities
-- **module-manifest-to-package-json** — Generates `pkg/package.json` from module metadata.
-  Reads `pyproject.toml` (Python modules, via `[tool.ws-module]`)
-  or `Cargo.toml` (Rust modules, via `[package.metadata.ws-module]`).
 
 ### Verification (`verification/`)
 
@@ -91,9 +91,11 @@ and must stay in sync — `mise run check` will fail if they drift. Regenerate w
 - Most Rust modules: `wasm-pack build . --target web` from the module directory
 - WASM agent (nightly, MVP target): uses `RUSTFLAGS="-C target-cpu=mvp ..."` and `RUSTUP_TOOLCHAIN=nightly`
 - `har1` and `face-detection`: after wasm-pack, merge extra `package.json` fields with `yq`
-- Python modules: `uv build --wheel` then `cargo run -p module-manifest-to-package-json`
-- Rust modules needing dependency injection: `cargo run -p module-manifest-to-package-json`
+- Python modules: `uv build --wheel` then `cargo run -p et-cli -- module-package-json`
+- Rust modules needing dependency injection: `cargo run -p et-cli -- module-package-json`
   merges `[package.metadata.ws-module.dependencies]` from `Cargo.toml` into `pkg/package.json`
+- `et-cli module-package-json` reads `pyproject.toml` (Python modules, via `[tool.ws-module]`)
+  or `Cargo.toml` (Rust modules, via `[package.metadata.ws-module]`).
 - Java: `mvn package` from repo root (uses `pom.xml`)
 
 ## Observability
diff --git a/Cargo.lock b/Cargo.lock
index 254194a..04f3c1c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2038,15 +2038,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "module-manifest-to-package-json"
-version = "0.1.0"
-dependencies = [
- "serde",
- "serde_json",
- "toml",
-]
-
 [[package]]
 name = "multimap"
 version = "0.10.1"
diff --git a/Cargo.toml b/Cargo.toml
index 2ee9119..8fa54a9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,6 @@ members = [
   "services/ws-wasm-agent",
   "utilities/cli",
   "utilities/onnx",
-  "utilities/module-manifest-to-package-json",
 ]
 resolver = "2"
 
diff --git a/utilities/cli/src/docker_compose.rs b/utilities/cli/src/deployment_types/docker_compose.rs
similarity index 100%
rename from utilities/cli/src/docker_compose.rs
rename to utilities/cli/src/deployment_types/docker_compose.rs
diff --git a/utilities/cli/src/mise.rs b/utilities/cli/src/deployment_types/mise.rs
similarity index 100%
rename from utilities/cli/src/mise.rs
rename to utilities/cli/src/deployment_types/mise.rs
diff --git a/utilities/cli/src/deployment_types/mod.rs b/utilities/cli/src/deployment_types/mod.rs
new file mode 100644
index 0000000..30a4991
--- /dev/null
+++ b/utilities/cli/src/deployment_types/mod.rs
@@ -0,0 +1,5 @@
+mod docker_compose;
+mod mise;
+
+pub use docker_compose::{docker_image_module_paths, generate_docker_compose_deployment};
+pub use mise::{generate_mise_deployment, scenario_module_paths};
diff --git a/utilities/cli/src/lib.rs b/utilities/cli/src/lib.rs
index bf233f7..530cf20 100644
--- a/utilities/cli/src/lib.rs
+++ b/utilities/cli/src/lib.rs
@@ -8,11 +8,13 @@ use clap::ValueEnum;
 use edge_toolkit::input::ClusterInput;
 use serde::Deserialize;
 
-mod docker_compose;
-mod mise;
+mod deployment_types;
+mod module_package_json;
 
-pub use docker_compose::{docker_image_module_paths, generate_docker_compose_deployment};
-pub use mise::{generate_mise_deployment, scenario_module_paths};
+pub use deployment_types::{
+    docker_image_module_paths, generate_docker_compose_deployment, generate_mise_deployment, scenario_module_paths,
+};
+pub use module_package_json::generate_module_package_json;
 
 #[derive(Debug, Clone, Copy, Default, Deserialize, PartialEq, Eq, ValueEnum)]
 #[serde(rename_all = "lowercase")]
diff --git a/utilities/cli/src/main.rs b/utilities/cli/src/main.rs
index b2b2fbb..082c1bc 100644
--- a/utilities/cli/src/main.rs
+++ b/utilities/cli/src/main.rs
@@ -2,7 +2,7 @@ use std::path::PathBuf;
 
 use anyhow::Result;
 use clap::{Parser, Subcommand};
-use et_cli::{OutputType, generate_deployment, regenerate_verification};
+use et_cli::{OutputType, generate_deployment, generate_module_package_json, regenerate_verification};
 
 #[derive(Parser)]
 struct Cli {
@@ -26,6 +26,11 @@ enum Commands {
         #[arg(long, default_value = "verification")]
         verification_root: PathBuf,
     },
+    /// Generate pkg/package.json from module metadata.
+    ModulePackageJson {
+        #[arg(long, default_value = ".")]
+        module_dir: PathBuf,
+    },
 }
 
 fn main() -> Result<()> {
@@ -64,6 +69,10 @@ fn main() -> Result<()> {
             }
             println!("Regenerated {} verification scenario output set(s).", regenerated.len());
         }
+        Commands::ModulePackageJson { module_dir } => {
+            let output_path = generate_module_package_json(module_dir)?;
+            println!("Wrote {}", output_path.display());
+        }
     }
 
     Ok(())
diff --git a/utilities/module-manifest-to-package-json/src/main.rs b/utilities/cli/src/module_package_json/mod.rs
similarity index 52%
rename from utilities/module-manifest-to-package-json/src/main.rs
rename to utilities/cli/src/module_package_json/mod.rs
index b17b937..a0dde01 100644
--- a/utilities/module-manifest-to-package-json/src/main.rs
+++ b/utilities/cli/src/module_package_json/mod.rs
@@ -2,6 +2,7 @@ use std::collections::BTreeMap;
 use std::fs;
 use std::path::{Path, PathBuf};
 
+use anyhow::{Context, Result, anyhow};
 use serde::Deserialize;
 use serde_json::{Map, Value, json};
 
@@ -56,27 +57,33 @@ struct CargoWsModule {
     dependencies: BTreeMap<String, String>,
 }
 
-fn main() {
-    let out_path = PathBuf::from("pkg/package.json");
-    let package_json = if Path::new("pyproject.toml").is_file() {
-        package_json_from_pyproject()
-    } else if Path::new("Cargo.toml").is_file() {
-        package_json_from_cargo(&out_path)
+pub fn generate_module_package_json(module_dir: &Path) -> Result<PathBuf> {
+    let out_path = module_dir.join("pkg/package.json");
+    let package_json = if module_dir.join("pyproject.toml").is_file() {
+        package_json_from_pyproject(module_dir)?
+    } else if module_dir.join("Cargo.toml").is_file() {
+        package_json_from_cargo(module_dir, &out_path)?
     } else {
-        panic!("Expected pyproject.toml or Cargo.toml in the current directory");
+        return Err(anyhow!(
+            "Expected pyproject.toml or Cargo.toml in module directory {:?}",
+            module_dir
+        ));
     };
 
-    fs::create_dir_all(out_path.parent().unwrap()).unwrap();
-    let mut out = serde_json::to_string_pretty(&package_json).unwrap();
+    let parent = out_path
+        .parent()
+        .ok_or_else(|| anyhow!("Output path {:?} has no parent directory", out_path))?;
+    fs::create_dir_all(parent).with_context(|| format!("Failed to create output directory: {:?}", parent))?;
+    let mut out = serde_json::to_string_pretty(&package_json).context("Failed to serialize package JSON")?;
     out.push('\n');
-    fs::write(&out_path, &out).unwrap_or_else(|e| panic!("Failed to write {}: {e}", out_path.display()));
+    fs::write(&out_path, &out).with_context(|| format!("Failed to write {}", out_path.display()))?;
 
-    println!("Wrote {}", out_path.display());
+    Ok(out_path)
 }
 
-fn package_json_from_pyproject() -> Value {
-    let pyproject_path = PathBuf::from("pyproject.toml");
-    let pyproject: Pyproject = read_toml(&pyproject_path);
+fn package_json_from_pyproject(module_dir: &Path) -> Result<Value> {
+    let pyproject_path = module_dir.join("pyproject.toml");
+    let pyproject: Pyproject = read_toml(&pyproject_path)?;
     let p = &pyproject.project;
     let mut pkg = Map::from_iter([
         ("name".to_string(), json!(p.name)),
@@ -89,12 +96,12 @@ fn package_json_from_pyproject() -> Value {
     if !pyproject.tool.ws_module.dependencies.is_empty() {
         pkg.insert("dependencies".to_string(), json!(pyproject.tool.ws_module.dependencies));
     }
-    Value::Object(pkg)
+    Ok(Value::Object(pkg))
 }
 
-fn package_json_from_cargo(out_path: &Path) -> Value {
-    let cargo_toml: CargoPackage = read_toml(Path::new("Cargo.toml"));
-    let mut pkg = read_package_json(out_path).unwrap_or_else(|| {
+fn package_json_from_cargo(module_dir: &Path, out_path: &Path) -> Result<Value> {
+    let cargo_toml: CargoPackage = read_toml(&module_dir.join("Cargo.toml"))?;
+    let mut pkg = read_package_json(out_path)?.unwrap_or_else(|| {
         let mut pkg = Map::new();
         pkg.insert("name".to_string(), json!(cargo_toml.package.name));
         pkg.insert("type".to_string(), json!("module"));
@@ -106,7 +113,7 @@ fn package_json_from_cargo(out_path: &Path) -> Value {
     }
 
     let Some(ws_module) = cargo_toml.package.metadata.and_then(|metadata| metadata.ws_module) else {
-        return Value::Object(pkg);
+        return Ok(Value::Object(pkg));
     };
 
     if !ws_module.dependencies.is_empty() {
@@ -115,29 +122,33 @@ fn package_json_from_cargo(out_path: &Path) -> Value {
             .or_insert_with(|| Value::Object(Map::new()));
         let dependency_map = dependencies
             .as_object_mut()
-            .unwrap_or_else(|| panic!("{} contains a non-object dependencies field", out_path.display()));
+            .ok_or_else(|| anyhow!("{} contains a non-object dependencies field", out_path.display()))?;
         for (name, version) in ws_module.dependencies {
             dependency_map.insert(name, json!(version));
         }
     }
 
-    Value::Object(pkg)
+    Ok(Value::Object(pkg))
 }
 
-fn read_toml<T>(path: &Path) -> T
+fn read_toml<T>(path: &Path) -> Result<T>
 where
     T: for<'de> Deserialize<'de>,
 {
-    let src = fs::read_to_string(path).unwrap_or_else(|e| panic!("Failed to read {}: {e}", path.display()));
-    toml::from_str(&src).unwrap_or_else(|e| panic!("Failed to parse {}: {e}", path.display()))
+    let src = fs::read_to_string(path).with_context(|| format!("Failed to read {}", path.display()))?;
+    toml::from_str(&src).with_context(|| format!("Failed to parse {}", path.display()))
 }
 
-fn read_package_json(path: &Path) -> Option<Map<String, Value>> {
-    let src = fs::read_to_string(path).ok()?;
+fn read_package_json(path: &Path) -> Result<Option<Map<String, Value>>> {
+    let src = match fs::read_to_string(path) {
+        Ok(src) => src,
+        Err(error) if error.kind() == std::io::ErrorKind::NotFound => return Ok(None),
+        Err(error) => return Err(error).with_context(|| format!("Failed to read {}", path.display())),
+    };
     let Value::Object(pkg) =
-        serde_json::from_str(&src).unwrap_or_else(|e| panic!("Failed to parse {}: {e}", path.display()))
+        serde_json::from_str(&src).with_context(|| format!("Failed to parse {}", path.display()))?
     else {
-        panic!("{} must contain a JSON object", path.display());
+        return Err(anyhow!("{} must contain a JSON object", path.display()));
     };
-    Some(pkg)
+    Ok(Some(pkg))
 }
diff --git a/utilities/cli/tests/module_package_json.rs b/utilities/cli/tests/module_package_json.rs
new file mode 100644
index 0000000..46ba949
--- /dev/null
+++ b/utilities/cli/tests/module_package_json.rs
@@ -0,0 +1,79 @@
+#![cfg(test)]
+
+use std::fs;
+
+use et_cli::generate_module_package_json;
+use serde_json::Value;
+use tempfile::tempdir;
+
+#[test]
+fn module_package_json_generates_from_pyproject_metadata() {
+    let test_root = tempdir().unwrap();
+    let module_dir = test_root.path();
+    fs::write(
+        module_dir.join("pyproject.toml"),
+        r#"[project]
+name = "et-ws-python-module"
+version = "0.1.0"
+description = "Python module"
+license = "Apache-2.0"
+
+[tool.ws-module]
+js-main = "python_module.js"
+
+[tool.ws-module.dependencies]
+et-model-face1 = "*"
+"#,
+    )
+    .unwrap();
+
+    let output_path = generate_module_package_json(module_dir).unwrap();
+    let package: Value = serde_json::from_str(&fs::read_to_string(output_path).unwrap()).unwrap();
+
+    assert_eq!(package["name"], "et-ws-python-module");
+    assert_eq!(package["type"], "module");
+    assert_eq!(package["description"], "Python module");
+    assert_eq!(package["version"], "0.1.0");
+    assert_eq!(package["license"], "Apache-2.0");
+    assert_eq!(package["main"], "python_module.js");
+    assert_eq!(package["dependencies"]["et-model-face1"], "*");
+}
+
+#[test]
+fn module_package_json_merges_cargo_ws_module_dependencies() {
+    let test_root = tempdir().unwrap();
+    let module_dir = test_root.path();
+    let package_dir = module_dir.join("pkg");
+    fs::create_dir_all(&package_dir).unwrap();
+    fs::write(
+        module_dir.join("Cargo.toml"),
+        r#"[package]
+name = "et-ws-rust-module"
+version = "0.1.0"
+edition = "2024"
+
+[package.metadata.ws-module.dependencies]
+et-model-har-motion1 = "*"
+"#,
+    )
+    .unwrap();
+    fs::write(
+        package_dir.join("package.json"),
+        r#"{
+  "type": "module",
+  "dependencies": {
+    "existing-package": "1.0.0"
+  }
+}
+"#,
+    )
+    .unwrap();
+
+    let output_path = generate_module_package_json(module_dir).unwrap();
+    let package: Value = serde_json::from_str(&fs::read_to_string(output_path).unwrap()).unwrap();
+
+    assert_eq!(package["name"], "et-ws-rust-module");
+    assert_eq!(package["type"], "module");
+    assert_eq!(package["dependencies"]["existing-package"], "1.0.0");
+    assert_eq!(package["dependencies"]["et-model-har-motion1"], "*");
+}
diff --git a/utilities/cli/tests/test_scenario_generation.rs b/utilities/cli/tests/scenario_generation.rs
similarity index 99%
rename from utilities/cli/tests/test_scenario_generation.rs
rename to utilities/cli/tests/scenario_generation.rs
index 7b93def..9e3b4b5 100644
--- a/utilities/cli/tests/test_scenario_generation.rs
+++ b/utilities/cli/tests/scenario_generation.rs
@@ -1,3 +1,5 @@
+#![cfg(test)]
+
 use std::fs;
 
 use et_cli::{
diff --git a/utilities/module-manifest-to-package-json/Cargo.toml b/utilities/module-manifest-to-package-json/Cargo.toml
deleted file mode 100644
index 00696da..0000000
--- a/utilities/module-manifest-to-package-json/Cargo.toml
+++ /dev/null
@@ -1,16 +0,0 @@
-[package]
-name = "module-manifest-to-package-json"
-description = "Generate pkg/package.json from ws-module project metadata"
-version = "0.1.0"
-edition.workspace = true
-license.workspace = true
-repository.workspace = true
-
-[[bin]]
-name = "module-manifest-to-package-json"
-path = "src/main.rs"
-
-[dependencies]
-serde.workspace = true
-serde_json.workspace = true
-toml.workspace = true