diff --git a/Cargo.lock b/Cargo.lock
index d3172c867..08f30143f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7618,6 +7618,7 @@ dependencies = [
  "reqwest 0.12.24",
  "rolldown",
  "rolldown_common",
+ "rolldown_error",
  "rolldown_utils",
  "rustyline",
  "serde",
diff --git a/Cargo.toml b/Cargo.toml
index 006d5afc6..b3fa90b7e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -259,6 +259,7 @@ regex = "1"
 reqwest = { version = "0.12", features = ["stream", "json"] }
 rolldown = { git = "https://github.com/rolldown/rolldown.git", tag = "v1.0.0-rc.3" }
 rolldown_common = { git = "https://github.com/rolldown/rolldown.git", tag = "v1.0.0-rc.3" }
+rolldown_error = { git = "https://github.com/rolldown/rolldown.git", tag = "v1.0.0-rc.3" }
 rolldown_utils = { git = "https://github.com/rolldown/rolldown.git", tag = "v1.0.0-rc.3" }
 ron = "0.8"
 rusqlite = { version = "0.29.0", features = ["bundled", "column_decltype"] }
diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index 3348e1a26..c2ac45c40 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -81,6 +81,7 @@ glob.workspace = true
 dialoguer = { workspace = true, features = ["fuzzy-select"] }
 rolldown.workspace = true
 rolldown_common.workspace = true
+rolldown_error.workspace = true
 rolldown_utils.workspace = true
 xmltree.workspace = true
 quick-xml.workspace = true
diff --git a/crates/cli/src/lib.rs b/crates/cli/src/lib.rs
index 175bcf14f..9e40d2804 100644
--- a/crates/cli/src/lib.rs
+++ b/crates/cli/src/lib.rs
@@ -74,3 +74,14 @@ pub async fn exec_subcommand(
     }
     .map(|()| ExitCode::SUCCESS)
 }
+
+/// An error type indicating that the process should exit silently with the
+/// given `ExitCode`.
+#[derive(thiserror::Error, Debug)]
+#[error("exit with {0:?}")]
+pub struct ExitWithCode(pub ExitCode);
+
+impl ExitWithCode {
+    /// Basic unsuccessful termination.
+    pub const FAILURE: Self = ExitWithCode(ExitCode::FAILURE);
+}
diff --git a/crates/cli/src/main.rs b/crates/cli/src/main.rs
index 5d768046a..6f2e4d23f 100644
--- a/crates/cli/src/main.rs
+++ b/crates/cli/src/main.rs
@@ -43,7 +43,9 @@ async fn main() -> anyhow::Result<ExitCode> {
         .unwrap_or_else(|| paths.cli_config_dir.cli_toml());
     let config = Config::load(cli_toml)?;
 
-    exec_subcommand(config, &paths, root_dir, cmd, subcommand_args).await
+    exec_subcommand(config, &paths, root_dir, cmd, subcommand_args)
+        .await
+        .or_else(|e| e.downcast::<ExitWithCode>().map(|e| e.0))
 }
 
 #[cfg(feature = "markdown-docs")]
diff --git a/crates/cli/src/tasks/javascript.rs b/crates/cli/src/tasks/javascript.rs
index b6af1b2f4..68af61faa 100644
--- a/crates/cli/src/tasks/javascript.rs
+++ b/crates/cli/src/tasks/javascript.rs
@@ -1,14 +1,19 @@
 use anyhow::Context;
 use regex::Regex;
-use rolldown::{Bundler, BundlerOptions, Either, SourceMapType};
+use rolldown::{BundleOutput, Bundler, BundlerOptions, Either, SourceMapType};
+use rolldown_error::{BuildDiagnostic, DiagnosableResolveError, DiagnosticOptions, Severity};
 use rolldown_utils::indexmap::FxIndexMap;
 use rolldown_utils::js_regex::HybridRegex;
 use rolldown_utils::pattern_filter::StringOrRegex;
 use std::fs;
+use std::io::IsTerminal;
 use std::path::{Path, PathBuf};
+use std::process::ExitCode;
 use std::sync::{Arc, OnceLock};
 use tokio::runtime::{Builder, Handle, Runtime};
 
+use crate::ExitWithCode;
+
 static RUNTIME: OnceLock<Runtime> = OnceLock::new();
 
 fn runtime() -> &'static Runtime {
@@ -38,6 +43,33 @@ where
 
 pub(crate) fn build_javascript(project_path: &Path, build_debug: bool) -> anyhow::Result<PathBuf> {
     let cwd = fs::canonicalize(project_path)?;
+
+    let mut tsc_path = cwd.join("node_modules/.bin/tsc");
+    if cfg!(windows) {
+        tsc_path.set_extension(".cmd");
+    }
+    if tsc_path.exists() {
+        let status = std::process::Command::new(tsc_path)
+            .arg("--noEmit")
+            .current_dir(&cwd)
+            .status()
+            .context("Failed to execute tsc")?;
+        if !status.success() {
+            if let Some(code) = status.code() {
+                if let Ok(code) = u8::try_from(code).map(ExitCode::from) {
+                    anyhow::bail!(ExitWithCode(code));
+                }
+            }
+            // For an abnormal exit, show the details of the status.
+            anyhow::bail!("tsc exited with {status}");
+        }
+    } else {
+        eprintln!(
+            "tsc not found in node_modules. Make sure you have the `typescript` package \
+             as a dev-dependency and that your dependencies are installed."
+        )
+    }
+
     let mut bundler = Bundler::new(BundlerOptions {
         input: Some(vec!["./src/index.ts".to_string().into()]),
         cwd: Some(cwd.clone()),
@@ -188,14 +220,42 @@ pub(crate) fn build_javascript(project_path: &Path, build_debug: bool) -> anyhow
         strict_execution_order: None,
     })?;
 
-    let bundle_output = run_blocking(async move { bundler.write().await })?;
+    let bundle_result = run_blocking(async move { bundler.write().await });
 
-    bundle_output.warnings.into_iter().for_each(|w| {
-        eprintln!("Rolldown warning: {w}");
-    });
+    let (mut bundle_result, diagnostics) = match bundle_result {
+        Ok(BundleOutput { warnings, assets }) => (Some(assets), warnings),
+        Err(errors) => (None, errors.into_vec()),
+    };
 
-    let output_chunk = bundle_output
-        .assets
+    let color = std::io::stderr().is_terminal();
+    let diag_options = DiagnosticOptions { cwd };
+    for mut diag in diagnostics {
+        // if an import failed to resolve, force it to be an error.
+        if let Some(err) = diag.downcast_mut::<DiagnosableResolveError>() {
+            err.help = Some("Module not found".into());
+            // `BuildDiagnostic` doesn't let us change its severity to error. Instead, we
+            // construct a fresh `BuildDiagnostic` (which will have Severity::Error), then
+            // swap in the real `DiagnosableResolveError`.
+            let mut new_diag = BuildDiagnostic::resolve_error(
+                Default::default(),
+                Default::default(),
+                rolldown_error::DiagnosableArcstr::String(Default::default()),
+                Default::default(),
+                err.diagnostic_kind,
+                Default::default(),
+            );
+            std::mem::swap(new_diag.downcast_mut::<DiagnosableResolveError>().unwrap(), err);
+            diag = new_diag;
+        }
+        // if there are any errors, we want to bail after printing
+        if diag.severity() == Severity::Error {
+            bundle_result = None;
+        }
+        eprintln!("{}", diag.to_diagnostic_with(&diag_options).convert_to_string(color));
+    }
+    let bundle_assets = bundle_result.ok_or(ExitWithCode::FAILURE)?;
+
+    let output_chunk = bundle_assets
         .into_iter()
         .find_map(|chunk| match chunk {
             rolldown_common::Output::Chunk(chunk) if chunk.is_entry && chunk.filename == "bundle.js" => Some(chunk),