diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7ac276d..f54a59e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: [main, 'feat/**', 'fix/**']
+    branches: [main, dev, 'feat/**', 'fix/**']
   pull_request:
     branches: [main]
 
@@ -38,4 +38,4 @@ jobs:
           curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_TOKEN}/sendMessage" \
             -d chat_id="${TELEGRAM_CHAT_ID}" \
             -d parse_mode="HTML" \
-            -d text="❌ <b>CI failed</b> on <code>${{ github.ref_name }}</code>%0A${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            -d text="&#10060; <b>CI failed</b> on <code>${{ github.ref_name }}</code>%0A${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
diff --git a/Cargo.toml b/Cargo.toml
index 678be4a..4efc2f9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "eullm-agent"
-version = "0.1.6"
+version = "0.1.7"
 edition = "2021"
 license = "Apache-2.0"
 description = "EULLM Agent — autonomous ReAct agent with multi-provider LLM support"
diff --git a/src/modules/builtin.rs b/src/modules/builtin.rs
index a0dab73..be9a1fd 100644
--- a/src/modules/builtin.rs
+++ b/src/modules/builtin.rs
@@ -12,6 +12,7 @@ fn ocr() -> ModuleManifest {
         version: "1.0",
         install_linux: vec!["sudo apt-get install -y tesseract-ocr".into()],
         install_macos: vec!["brew install tesseract".into()],
+        install_windows: vec!["choco install tesseract -y".into()],
         tools: vec![ModuleToolSpec {
             name: "ocr_image".into(),
             description: "Extract text from an image file using OCR.".into(),
@@ -41,6 +42,7 @@ fn pdf() -> ModuleManifest {
         version: "1.0",
         install_linux: vec!["sudo apt-get install -y poppler-utils".into()],
         install_macos: vec!["brew install poppler".into()],
+        install_windows: vec!["choco install poppler -y".into()],
         tools: vec![ModuleToolSpec {
             name: "pdf_to_text".into(),
             description: "Extract all text content from a PDF file".into(),
diff --git a/src/modules/mod.rs b/src/modules/mod.rs
index cd13b8b..3fdcc8d 100644
--- a/src/modules/mod.rs
+++ b/src/modules/mod.rs
@@ -19,12 +19,26 @@ pub struct ModuleManifest {
     pub name: String,
     pub description: String,
     pub version: &'static str,
+    #[allow(dead_code)]
     pub install_linux: Vec<String>,
     #[allow(dead_code)]
     pub install_macos: Vec<String>,
+    #[allow(dead_code)]
+    pub install_windows: Vec<String>,
     pub tools: Vec<ModuleToolSpec>,
 }
 
+impl ModuleManifest {
+    pub fn install_commands(&self) -> &[String] {
+        #[cfg(target_os = "macos")]
+        return &self.install_macos;
+        #[cfg(target_os = "windows")]
+        return &self.install_windows;
+        #[cfg(not(any(target_os = "macos", target_os = "windows")))]
+        return &self.install_linux;
+    }
+}
+
 #[derive(Debug, Serialize, Deserialize, Default)]
 pub struct ModuleState {
     pub installed: HashSet<String>,
diff --git a/src/tools/module_tool.rs b/src/tools/module_tool.rs
index 35c4c7c..3a7acb9 100644
--- a/src/tools/module_tool.rs
+++ b/src/tools/module_tool.rs
@@ -1,12 +1,30 @@
 use anyhow::Result;
 use async_trait::async_trait;
 use serde_json::{json, Value};
+use std::process::Output;
 use std::sync::{Arc, Mutex};
 
 use crate::llm::ToolDefinition;
 use crate::modules::{ModuleRegistry, ModuleToolSpec};
 use super::{Tool, ToolRegistry};
 
+/// Runs a shell command using the platform-appropriate shell.
+async fn run_shell(cmd: &str) -> Result<Output> {
+    #[cfg(target_os = "windows")]
+    let out = tokio::process::Command::new("cmd")
+        .arg("/C")
+        .arg(cmd)
+        .output()
+        .await?;
+    #[cfg(not(target_os = "windows"))]
+    let out = tokio::process::Command::new("sh")
+        .arg("-c")
+        .arg(cmd)
+        .output()
+        .await?;
+    Ok(out)
+}
+
 /// Executes a single module-defined tool via shell command template substitution.
 pub struct ModuleTool {
     spec: ModuleToolSpec,
@@ -41,12 +59,7 @@ impl Tool for ModuleTool {
             }
         }
 
-        let output = tokio::process::Command::new("sh")
-            .arg("-c")
-            .arg(&cmd)
-            .output()
-            .await?;
-
+        let output = run_shell(&cmd).await?;
         let stdout = String::from_utf8_lossy(&output.stdout).to_string();
         let stderr = String::from_utf8_lossy(&output.stderr).to_string();
 
@@ -162,18 +175,9 @@ impl Tool for InstallModuleTool {
             anyhow::anyhow!("Unknown module: '{}'. Use list_modules to see available modules.", name)
         })?;
 
-        #[cfg(target_os = "macos")]
-        let commands = &manifest.install_macos;
-        #[cfg(not(target_os = "macos"))]
-        let commands = &manifest.install_linux;
-
-        for cmd in commands {
+        for cmd in manifest.install_commands() {
             tracing::info!("module install: {cmd}");
-            let output = tokio::process::Command::new("sh")
-                .arg("-c")
-                .arg(cmd)
-                .output()
-                .await?;
+            let output = run_shell(cmd).await?;
             if !output.status.success() {
                 let stderr = String::from_utf8_lossy(&output.stderr);
                 return Err(anyhow::anyhow!(