diff --git a/crates/ide-build/src/compile/mod.rs b/crates/ide-build/src/compile/mod.rs
index ce41a1089..8b4119225 100644
--- a/crates/ide-build/src/compile/mod.rs
+++ b/crates/ide-build/src/compile/mod.rs
@@ -153,7 +153,7 @@ fn detect_dir(dir: &Path, model: &BuildModel, root: &Path) -> Option<BuildSystem
         Some(BuildSystem::Gradle)
     } else if has(dir, &["Cargo.toml"]) {
         Some(BuildSystem::Cargo)
-    } else if has(dir, &["go.mod"]) {
+    } else if has(dir, &["go.mod", "go.work"]) {
         Some(BuildSystem::Go)
     } else if has(dir, &["tsconfig.json", "package.json"]) {
         Some(BuildSystem::TypeScript)
@@ -227,7 +227,7 @@ pub fn plan(
         BuildSystem::Gradle => gradle_steps(root, model, kind, module_dir.as_deref())?,
         BuildSystem::Cargo => cargo_steps(&dir, kind),
         // Go builds the file's package (a module holds many).
-        BuildSystem::Go => go_steps(file.and_then(Path::parent).unwrap_or(&dir), kind),
+        BuildSystem::Go => go_steps(file.and_then(Path::parent).unwrap_or(&dir), kind)?,
         BuildSystem::TypeScript => ts_steps(&dir, kind),
         BuildSystem::CMake => cmake_steps(&dir, kind, cmake.and_then(<[_]>::first)),
     };
@@ -374,7 +374,31 @@ fn cmake_steps(dir: &Path, kind: BuildKind, profile: Option<&CMakeProfile>) -> V
     steps
 }
 
-fn go_steps(dir: &Path, kind: BuildKind) -> Vec<BuildStep> {
+fn go_steps(dir: &Path, kind: BuildKind) -> IdeResult<Vec<BuildStep>> {
+    if dir.join("go.work").is_file() {
+        let work_file = dunce::canonicalize(dir.join("go.work"))?;
+        let modules = ide_core::go::work_modules(&std::fs::read_to_string(dir.join("go.work"))?);
+        if modules.is_empty() {
+            return Err(IdeError::invalid("The Go workspace contains no modules"));
+        }
+        let mut steps = Vec::new();
+        for module in modules {
+            let module = dir.join(module);
+            if !module.join("go.mod").is_file() {
+                return Err(IdeError::not_found(format!("Go workspace module has no go.mod: {}", module.display())));
+            }
+            let mut module_steps = go_module_steps(&module, kind);
+            for step in &mut module_steps {
+                step.env.insert("GOWORK".into(), work_file.to_string_lossy().into_owned());
+            }
+            steps.extend(module_steps);
+        }
+        return Ok(steps);
+    }
+    Ok(go_module_steps(dir, kind))
+}
+
+fn go_module_steps(dir: &Path, kind: BuildKind) -> Vec<BuildStep> {
     let module_root = dir.ancestors().find(|d| d.join("go.mod").is_file()).unwrap_or(dir);
     let target = if module_root == dir { "./...".to_owned() } else { format!("./{}/...", rel_str(module_root, dir)) };
     let mut args = vec!["build"];
@@ -813,6 +837,68 @@ fn launch_class_dirs(system: BuildSystem, module: &Path, test: bool) -> Vec<Path
 
 #[cfg(test)]
 mod tests {
+    #[test]
+    fn go_workspace_build_commands_compile_members_with_local_dependencies() {
+        let Some(go) = ide_core::process::find_executable("go", &ide_core::tool_path::search_path()) else {
+            return;
+        };
+        let tmp = tempfile::tempdir().unwrap();
+        let root = &tmp.path().join("workspace");
+        write(root, "go.work", "go 1.22\nuse (\n ./app\n ./lib\n ../external\n)\n");
+        write(root, "lib/go.mod", "module example.com/lib\ngo 1.22\n");
+        write(root, "lib/lib.go", "package lib\nfunc Value() int { return 1 }\n");
+        write(root, "app/go.mod", "module example.com/app\ngo 1.22\nrequire example.com/lib v0.0.0\n");
+        write(root, "app/main.go", "package main\nimport \"example.com/lib\"\nfunc main(){_ = lib.Value()}\n");
+        write(root, "../external/go.mod", "module example.com/external\ngo 1.22\nrequire example.com/lib v0.0.0\n");
+        write(root, "../external/main.go", "package main\nimport \"example.com/lib\"\nfunc main(){_ = lib.Value()}\n");
+        let plan = plan(root, &BuildModel::default(), BuildKind::Build, None, None).unwrap();
+        for step in plan.steps {
+            let result = std::process::Command::new(&go)
+                .args(&step.args)
+                .envs(&step.env)
+                .env("GOPROXY", "off")
+                .current_dir(&step.cwd)
+                .output()
+                .unwrap();
+            assert!(result.status.success(), "{}", String::from_utf8_lossy(&result.stderr));
+        }
+    }
+
+    #[test]
+    fn go_workspace_builds_every_use_module() {
+        let tmp = tempfile::tempdir().unwrap();
+        let root = tmp.path().join("workspace");
+        write(&root, "go.work", "go 1.22\nuse (\n  ./api\n  \"./lib with spaces\"\n  ../shared\n)\n");
+        for module in ["api", "lib with spaces", "../shared"] {
+            write(&root.join(module), "go.mod", "module example.com/p\ngo 1.22\n");
+        }
+        for kind in [BuildKind::Build, BuildKind::Rebuild, BuildKind::Artifacts] {
+            let p = plan(&root, &BuildModel::default(), kind, None, None).unwrap();
+            assert_eq!(p.system, BuildSystem::Go);
+            assert_eq!(p.steps.len(), 3);
+            for (step, module) in p.steps.iter().zip(["api", "lib with spaces", "../shared"]) {
+                assert_eq!(step.cwd, root.join(module));
+                let expected =
+                    if kind == BuildKind::Rebuild { vec!["build", "-a", "./..."] } else { vec!["build", "./..."] };
+                assert_eq!(step.args, expected);
+            }
+        }
+        let member =
+            plan(&root, &BuildModel::default(), BuildKind::Build, Some(&root.join("api/pkg/a.go")), None).unwrap();
+        assert_eq!(member.steps.len(), 1);
+        assert_eq!(member.steps[0].cwd, root.join("api"));
+        assert_eq!(member.steps[0].args, ["build", "./pkg/..."]);
+        write(&root, "go.work", "use ./missing\n");
+        assert!(
+            plan(&root, &BuildModel::default(), BuildKind::Build, None, None)
+                .unwrap_err()
+                .to_string()
+                .contains("go.mod")
+        );
+        write(&root, "go.work", "go 1.22\n");
+        assert!(plan(&root, &BuildModel::default(), BuildKind::Build, None, None).is_err());
+    }
+
     #[test]
     fn independent_gradle_builds_keep_their_launchers_and_task_paths() {
         let wrapper = if cfg!(windows) { "gradlew.bat" } else { "gradlew" };
diff --git a/crates/ide-core/src/go.rs b/crates/ide-core/src/go.rs
new file mode 100644
index 000000000..b31960c4f
--- /dev/null
+++ b/crates/ide-core/src/go.rs
@@ -0,0 +1,124 @@
+//! Go workspace module paths shared by project builds and run detection.
+use std::path::PathBuf;
+
+/// Module directories from a go.work file. Quoted paths and comments follow Go's file syntax.
+pub fn work_modules(text: &str) -> Vec<PathBuf> {
+    let mut tokens = Vec::new();
+    let mut chars = text.chars().peekable();
+    while let Some(ch) = chars.next() {
+        match ch {
+            '\n' | '(' | ')' => tokens.push(ch.to_string()),
+            ch if ch.is_whitespace() => {}
+            '/' if chars.peek() == Some(&'/') => {
+                for c in chars.by_ref() {
+                    if c == '\n' {
+                        tokens.push("\n".into());
+                        break;
+                    }
+                }
+            }
+            '"' | '`' => {
+                let Some(token) = quoted_work_path(&mut chars, ch) else { return Vec::new() };
+                tokens.push(token);
+            }
+            _ => {
+                let mut token = ch.to_string();
+                while chars.peek().is_some_and(|c| !c.is_whitespace() && *c != '(' && *c != ')') {
+                    token.push(chars.next().unwrap());
+                }
+                tokens.push(token);
+            }
+        }
+    }
+    let mut out = Vec::new();
+    let mut start = true;
+    let mut tokens = tokens.into_iter();
+    while let Some(token) = tokens.next() {
+        if token == "\n" {
+            start = true;
+            continue;
+        }
+        if start
+            && token == "use"
+            && let Some(path) = tokens.next()
+        {
+            if path == "(" {
+                let mut paths = Vec::new();
+                let mut closed = false;
+                for path in tokens.by_ref() {
+                    if path == ")" {
+                        closed = true;
+                        break;
+                    }
+                    if path != "\n" && !path.is_empty() {
+                        paths.push(PathBuf::from(path));
+                    }
+                }
+                if closed {
+                    out.extend(paths);
+                }
+            } else if path != "\n" && !path.is_empty() {
+                out.push(PathBuf::from(path));
+            }
+        }
+        start = false;
+    }
+    let mut seen = std::collections::HashSet::new();
+    out.retain(|path| seen.insert(path.clone()));
+    out
+}
+
+fn quoted_work_path(chars: &mut std::iter::Peekable<std::str::Chars<'_>>, quote: char) -> Option<String> {
+    let mut bytes = Vec::new();
+    while let Some(ch) = chars.next() {
+        if ch == quote {
+            return String::from_utf8(bytes).ok();
+        }
+        if ch == '\\' && quote == '"' {
+            let escaped = chars.next()?;
+            let byte = match escaped {
+                'a' => 7,
+                'b' => 8,
+                'f' => 12,
+                'n' => 10,
+                'r' => 13,
+                't' => 9,
+                'v' => 11,
+                '\\' => b'\\',
+                '"' => b'"',
+                'x' => {
+                    let digits: String = chars.by_ref().take(2).collect();
+                    if digits.len() != 2 {
+                        return None;
+                    }
+                    u8::from_str_radix(&digits, 16).ok()?
+                }
+                'u' | 'U' => {
+                    let width = if escaped == 'u' { 4 } else { 8 };
+                    let digits: String = chars.by_ref().take(width).collect();
+                    if digits.len() != width {
+                        return None;
+                    }
+                    let ch = char::from_u32(u32::from_str_radix(&digits, 16).ok()?)?;
+                    bytes.extend_from_slice(ch.to_string().as_bytes());
+                    continue;
+                }
+                '0'..='7' => {
+                    let digits = format!("{escaped}{}", chars.by_ref().take(2).collect::<String>());
+                    if digits.len() != 3 {
+                        return None;
+                    }
+                    u8::from_str_radix(&digits, 8).ok()?
+                }
+                _ => return None,
+            };
+            bytes.push(byte);
+        } else {
+            if ch == '\n' && quote == '"' {
+                return None;
+            }
+            bytes.extend_from_slice(ch.to_string().as_bytes());
+        }
+    }
+    None
+}
diff --git a/crates/ide-core/src/lib.rs b/crates/ide-core/src/lib.rs
index aa7db963a..6234af032 100644
--- a/crates/ide-core/src/lib.rs
+++ b/crates/ide-core/src/lib.rs
@@ -7,6 +7,7 @@
 pub mod editor_settings;
 pub mod error;
 pub mod event;
+pub mod go;
 pub mod ids;
 pub mod ignored;
 pub mod inspection_settings;
diff --git a/crates/ide-run/src/go.rs b/crates/ide-run/src/go.rs
index 18e8225bb..5593b46e0 100644
--- a/crates/ide-run/src/go.rs
+++ b/crates/ide-run/src/go.rs
@@ -269,127 +269,7 @@ pub fn prepare_test_file(root: &Path, config: &mut RunConfig) -> IdeResult<()> {
     Ok(())
 }
 
-/// Module directories from a go.work file. Quoted paths and comments follow Go's file syntax.
-pub fn work_modules(text: &str) -> Vec<PathBuf> {
-    let mut tokens = Vec::new();
-    let mut chars = text.chars().peekable();
-    while let Some(ch) = chars.next() {
-        match ch {
-            '\n' | '(' | ')' => tokens.push(ch.to_string()),
-            ch if ch.is_whitespace() => {}
-            '/' if chars.peek() == Some(&'/') => {
-                for c in chars.by_ref() {
-                    if c == '\n' {
-                        tokens.push("\n".into());
-                        break;
-                    }
-                }
-            }
-            '"' | '`' => {
-                let Some(token) = quoted_work_path(&mut chars, ch) else { return Vec::new() };
-                tokens.push(token);
-            }
-            _ => {
-                let mut token = ch.to_string();
-                while chars.peek().is_some_and(|c| !c.is_whitespace() && *c != '(' && *c != ')') {
-                    token.push(chars.next().unwrap());
-                }
-                tokens.push(token);
-            }
-        }
-    }
-    let mut out = Vec::new();
-    let mut start = true;
-    let mut tokens = tokens.into_iter();
-    while let Some(token) = tokens.next() {
-        if token == "\n" {
-            start = true;
-            continue;
-        }
-        if start
-            && token == "use"
-            && let Some(path) = tokens.next()
-        {
-            if path == "(" {
-                let mut paths = Vec::new();
-                let mut closed = false;
-                for path in tokens.by_ref() {
-                    if path == ")" {
-                        closed = true;
-                        break;
-                    }
-                    if path != "\n" && !path.is_empty() {
-                        paths.push(PathBuf::from(path));
-                    }
-                }
-                if closed {
-                    out.extend(paths);
-                }
-            } else if path != "\n" && !path.is_empty() {
-                out.push(PathBuf::from(path));
-            }
-        }
-        start = false;
-    }
-    let mut seen = std::collections::HashSet::new();
-    out.retain(|path| seen.insert(path.clone()));
-    out
-}
-
-fn quoted_work_path(chars: &mut std::iter::Peekable<std::str::Chars<'_>>, quote: char) -> Option<String> {
-    let mut bytes = Vec::new();
-    while let Some(ch) = chars.next() {
-        if ch == quote {
-            return String::from_utf8(bytes).ok();
-        }
-        if ch == '\\' && quote == '"' {
-            let escaped = chars.next()?;
-            let byte = match escaped {
-                'a' => 7,
-                'b' => 8,
-                'f' => 12,
-                'n' => 10,
-                'r' => 13,
-                't' => 9,
-                'v' => 11,
-                '\\' => b'\\',
-                '"' => b'"',
-                'x' => {
-                    let digits: String = chars.by_ref().take(2).collect();
-                    if digits.len() != 2 {
-                        return None;
-                    }
-                    u8::from_str_radix(&digits, 16).ok()?
-                }
-                'u' | 'U' => {
-                    let width = if escaped == 'u' { 4 } else { 8 };
-                    let digits: String = chars.by_ref().take(width).collect();
-                    if digits.len() != width {
-                        return None;
-                    }
-                    let ch = char::from_u32(u32::from_str_radix(&digits, 16).ok()?)?;
-                    bytes.extend_from_slice(ch.to_string().as_bytes());
-                    continue;
-                }
-                '0'..='7' => {
-                    let digits = format!("{escaped}{}", chars.by_ref().take(2).collect::<String>());
-                    if digits.len() != 3 {
-                        return None;
-                    }
-                    u8::from_str_radix(&digits, 8).ok()?
-                }
-                _ => return None,
-            };
-            bytes.push(byte);
-        } else {
-            if ch == '\n' && quote == '"' {
-                return None;
-            }
-            bytes.extend_from_slice(ch.to_string().as_bytes());
-        }
-    }
-    None
-}
+pub use ide_core::go::work_modules;
 
 #[cfg(test)]
 mod test_scope_tests {