update shell

docs/studio/pull-requests/PR-04a-project-launcher-window-lifecycle.md

@@ -0,0 +1,60 @@
+# PR-04a - Project Launcher Window Lifecycle
+
+## Briefing
+
+The current project launcher already exists as a view before the main shell.
+
+This PR evolves that flow into a separate launcher window so project selection and project editing no longer compete for the same application stage.
+
+## Objective
+
+Move the project launcher into its own window lifecycle and define how it coordinates with the main Studio project window.
+
+## Dependencies
+
+- [`../specs/1. Studio Shell and Workspace Layout Specification.md`](../specs/1.%20Studio%20Shell%20and%20Workspace%20Layout%20Specification.md)
+- [`../specs/2. Studio UI Foundations Specification.md`](../specs/2.%20Studio%20UI%20Foundations%20Specification.md)
+- `PR-03 - Project Launcher and Project Entry Shell`
+
+## Scope
+
+- introduce a dedicated launcher `Stage`
+- open the main Studio shell in a separate project window
+- define launcher visibility behavior when a project window opens
+- define launcher restoration behavior when a project window closes
+- keep event publication aligned with the Studio event model
+
+## Non-Goals
+
+- redesigning the launcher content model
+- implementing the new project wizard itself
+- supporting multiple simultaneous project windows unless needed by the chosen lifecycle
+
+## Execution Method
+
+1. Extract launcher-stage creation from the current single-window flow.
+2. Open the main Studio shell in its own project window after project selection or creation.
+3. Hide the launcher window when a project window opens.
+4. Restore or reshow the launcher window when the project window closes.
+5. Keep the transition between launcher and project window intentional and easy to follow.
+6. Preserve theme and i18n behavior in both windows.
+
+## Acceptance Criteria
+
+- the launcher runs in its own window
+- the Studio shell runs in a separate project window
+- opening or creating a project transitions from launcher to project window cleanly
+- closing the project window returns the user to the launcher window
+- the flow remains aligned with current project-open and project-created events
+
+## Validation
+
+- compile validation of `prometeu-studio`
+- smoke validation of launcher window opening
+- smoke validation of launcher hide/show behavior when a project window opens or closes
+
+## Affected Artifacts
+
+- `prometeu-studio` application entry and stage lifecycle
+- launcher and shell composition
+- project-open window behavior

docs/studio/pull-requests/PR-04b-new-project-wizard.md

@@ -0,0 +1,64 @@
+# PR-04b - New Project Wizard
+
+## Briefing
+
+The current project launcher can create a project directly from an inline text field.
+
+This PR replaces that minimal path with a dedicated wizard so project creation becomes a guided flow rather than a single-form action.
+
+## Objective
+
+Introduce a new project wizard that guides project creation before opening the Studio shell.
+
+## Dependencies
+
+- [`../specs/1. Studio Shell and Workspace Layout Specification.md`](../specs/1.%20Studio%20Shell%20and%20Workspace%20Layout%20Specification.md)
+- [`../specs/2. Studio UI Foundations Specification.md`](../specs/2.%20Studio%20UI%20Foundations%20Specification.md)
+- `PR-03 - Project Launcher and Project Entry Shell`
+- `PR-04a - Project Launcher Window Lifecycle`
+
+## Scope
+
+- replace inline project creation with a wizard flow
+- support at least:
+  - project name
+  - project location
+  - final confirmation
+- create the project through the existing project service layer
+- open the project after successful creation
+
+## Non-Goals
+
+- full template marketplace or template system
+- advanced preset configuration
+- remote project provisioning
+
+## Execution Method
+
+1. Introduce a `New Project Wizard` surface from the launcher.
+2. Split project creation into explicit steps.
+3. Validate project name and location before final confirmation.
+4. Reuse the existing project creation service instead of duplicating creation logic in the UI.
+5. Open the created project after the wizard completes successfully.
+6. Keep the wizard aligned with Studio theming and i18n rules.
+
+## Acceptance Criteria
+
+- `Create New Project` opens a wizard instead of creating inline immediately
+- the wizard supports name, location, and confirmation steps
+- invalid project data is blocked before creation
+- successful completion creates the project and opens it
+- the flow remains consistent with the launcher/project-entry model
+
+## Validation
+
+- compile validation of `prometeu-studio`
+- smoke validation of wizard opening and step progression
+- test or smoke coverage for successful project creation
+
+## Affected Artifacts
+
+- launcher UI
+- project creation flow
+- project service integration
+- entry transition from launcher to shell

docs/studio/pull-requests/README.md

@@ -41,3 +41,5 @@ The current Studio execution queue is:
 1. [`PR-01-studio-event-bus-foundation.md`](./PR-01-studio-event-bus-foundation.md)
 2. [`PR-02-studio-shell-components-wave-1.md`](./PR-02-studio-shell-components-wave-1.md)
 3. [`PR-03-project-launcher-and-project-entry-shell.md`](./PR-03-project-launcher-and-project-entry-shell.md)
+4. [`PR-04a-project-launcher-window-lifecycle.md`](./PR-04a-project-launcher-window-lifecycle.md)
+5. [`PR-04b-new-project-wizard.md`](./PR-04b-new-project-wizard.md)

prometeu-compiler/frontends/prometeu-frontend-pbs/src/main/java/p/studio/compiler/PBSDefinitions.java

@@ -3,6 +3,8 @@ package p.studio.compiler;
 import p.studio.compiler.models.FrontendSpec;
 import p.studio.utilities.structures.ReadOnlySet;
 
+import java.util.List;
+
 public class PBSDefinitions {
     public static final FrontendSpec PBS = FrontendSpec
             .builder()
@@ -10,5 +12,6 @@ public class PBSDefinitions {
             .allowedExtensions(ReadOnlySet.from("pbs", "barrel"))
             .sourceRoots(ReadOnlySet.from("src"))
             .entryPointCallableName("frame")
+            .stdlibVersions(List.of(FrontendSpec.Stdlib.asDefault(1)))
             .build();
 }

prometeu-compiler/prometeu-compiler-core/src/main/java/p/studio/compiler/models/FrontendSpec.java

@@ -4,6 +4,8 @@ import lombok.Builder;
 import lombok.Getter;
 import p.studio.utilities.structures.ReadOnlySet;
 
+import java.util.List;
+
 @Builder
 @Getter
 public class FrontendSpec {
@@ -13,8 +15,34 @@ public class FrontendSpec {
     private final boolean caseSensitive;
     @Builder.Default
     private final String entryPointCallableName = "main";
+    @Builder.Default
+    private final List<Stdlib> stdlibVersions = List.of();
 
     public String toString() {
         return String.format("FrontendSpec(language=%s, entryPoint=%s)", languageId, entryPointCallableName);
     }
+
+    public enum StdlibType {
+        DEFAULT,
+        STABLE,
+        EXPERIMENTAL,
+    }
+
+    public record Stdlib(int version, StdlibType type) {
+        public static Stdlib asDefault(final int version) {
+            return new Stdlib(version, StdlibType.DEFAULT);
+        }
+
+        public static Stdlib asStable(final int version) {
+            return new Stdlib(version, StdlibType.STABLE);
+        }
+
+        public static Stdlib of(final int version) {
+            return asStable(version);
+        }
+
+        public static Stdlib asExperimental(final int version) {
+            return new Stdlib(version, StdlibType.EXPERIMENTAL);
+        }
+    }
 }

prometeu-compiler/prometeu-frontend-registry/src/main/java/p/studio/compiler/FrontendRegistryService.java

@@ -5,6 +5,7 @@ import p.studio.compiler.services.FrontendPhaseService;
 import p.studio.compiler.services.PBSFrontendPhaseService;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 
@@ -28,4 +29,10 @@ public class FrontendRegistryService {
     public static Optional<FrontendPhaseService> getFrontendPhaseService(final String languageId) {
         return Optional.ofNullable(FRONTEND_PHASE_SERVICES.get(languageId));
     }
+
+    public static List<FrontendSpec> listFrontendSpecs() {
+        return FRONTEND_SPECS.values().stream()
+                .sorted((left, right) -> left.getLanguageId().compareToIgnoreCase(right.getLanguageId()))
+                .toList();
+    }
 }

prometeu-studio/build.gradle.kts

@@ -7,6 +7,7 @@ dependencies {
     implementation(project(":prometeu-infra"))
     implementation(project(":prometeu-compiler:prometeu-compiler-core"))
     implementation(project(":prometeu-compiler:prometeu-build-pipeline"))
+    implementation(project(":prometeu-compiler:prometeu-frontend-registry"))
     implementation(libs.javafx.controls)
     implementation(libs.javafx.fxml)
     implementation(libs.richtextfx)

prometeu-studio/src/main/java/p/studio/App.java

@@ -1,10 +1,8 @@
 package p.studio;
 
 import javafx.application.Application;
-import javafx.scene.Scene;
 import javafx.stage.Stage;
-import p.studio.utilities.i18n.I18n;
+import p.studio.window.StudioWindowCoordinator;
-import p.studio.window.StudioRootView;
 
 public class App extends Application {
 
@@ -16,13 +14,7 @@ public class App extends Application {
 
     @Override
     public void start(Stage stage) {
-        var root = new StudioRootView();
+        new StudioWindowCoordinator(stage).showLauncher();
-        var scene = new Scene(root, 1200, 800);
-
-        scene.getStylesheets().add(Container.theme().getDefaultTheme());
-        stage.titleProperty().bind(Container.i18n().bind(I18n.APP_TITLE));
-        stage.setScene(scene);
-        stage.show();
     }
 
     public static void main(String[] args) {

prometeu-studio/src/main/java/p/studio/projects/KnownProjectsService.java

@@ -0,0 +1,98 @@
+package p.studio.projects;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+public final class KnownProjectsService {
+    private final Path storageFile;
+    private final ProjectCatalogService projectCatalogService;
+
+    public KnownProjectsService(Path storageFile, ProjectCatalogService projectCatalogService) {
+        this.storageFile = Objects.requireNonNull(storageFile, "storageFile").toAbsolutePath().normalize();
+        this.projectCatalogService = Objects.requireNonNull(projectCatalogService, "projectCatalogService");
+    }
+
+    public List<ProjectReference> listKnownProjects() {
+        final boolean storageExists = Files.isRegularFile(storageFile);
+        final Set<Path> knownPaths = readStoredPaths();
+        if (!storageExists && knownPaths.isEmpty()) {
+            final List<ProjectReference> discovered = projectCatalogService.listProjects();
+            writeStoredPaths(discovered.stream().map(ProjectReference::rootPath).toList());
+            return discovered;
+        }
+
+        final List<ProjectReference> knownProjects = new ArrayList<>();
+        boolean mutated = false;
+        for (Path knownPath : knownPaths) {
+            if (!Files.isDirectory(knownPath)) {
+                mutated = true;
+                continue;
+            }
+            knownProjects.add(projectCatalogService.openProject(knownPath));
+        }
+
+        knownProjects.sort(Comparator.comparing(ProjectReference::name, String.CASE_INSENSITIVE_ORDER));
+        if (mutated) {
+            writeStoredPaths(knownProjects.stream().map(ProjectReference::rootPath).toList());
+        }
+        return List.copyOf(knownProjects);
+    }
+
+    public void remember(ProjectReference projectReference) {
+        final Set<Path> knownPaths = readStoredPaths();
+        knownPaths.add(normalize(projectReference.rootPath()));
+        writeStoredPaths(knownPaths);
+    }
+
+    public void forget(ProjectReference projectReference) {
+        final Set<Path> knownPaths = readStoredPaths();
+        knownPaths.remove(normalize(projectReference.rootPath()));
+        writeStoredPaths(knownPaths);
+    }
+
+    private Set<Path> readStoredPaths() {
+        if (!Files.isRegularFile(storageFile)) {
+            return new LinkedHashSet<>();
+        }
+
+        try {
+            final LinkedHashSet<Path> paths = new LinkedHashSet<>();
+            for (String line : Files.readAllLines(storageFile, StandardCharsets.UTF_8)) {
+                final String trimmed = line.trim();
+                if (trimmed.isBlank()) {
+                    continue;
+                }
+                paths.add(normalize(Path.of(trimmed)));
+            }
+            return paths;
+        } catch (IOException ioException) {
+            throw new UncheckedIOException(ioException);
+        }
+    }
+
+    private void writeStoredPaths(Iterable<Path> paths) {
+        try {
+            Files.createDirectories(storageFile.getParent());
+            final List<String> lines = new ArrayList<>();
+            for (Path path : paths) {
+                lines.add(normalize(path).toString());
+            }
+            Files.write(storageFile, lines, StandardCharsets.UTF_8);
+        } catch (IOException ioException) {
+            throw new UncheckedIOException(ioException);
+        }
+    }
+
+    private Path normalize(Path path) {
+        return Objects.requireNonNull(path, "path").toAbsolutePath().normalize();
+    }
+}

prometeu-studio/src/main/java/p/studio/projects/ProjectCatalogService.java

@@ -1,5 +1,8 @@
 package p.studio.projects;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.nio.file.Files;
@@ -11,6 +14,8 @@ import java.util.Objects;
 import java.util.stream.Stream;
 
 public final class ProjectCatalogService {
+    private static final String MANIFEST_FILE_NAME = "prometeu.json";
+    private static final ObjectMapper MAPPER = new ObjectMapper();
     private final Path projectsRoot;
 
     public ProjectCatalogService(Path projectsRoot) {
@@ -28,8 +33,8 @@ public final class ProjectCatalogService {
 
         try (Stream<Path> children = Files.list(projectsRoot)) {
             return children
-                    .filter(Files::isDirectory)
+                    .filter(this::isValidProjectRoot)
-                    .map(path -> new ProjectReference(path.getFileName().toString(), path))
+                    .map(this::buildReference)
                     .sorted(Comparator.comparing(ProjectReference::name, String.CASE_INSENSITIVE_ORDER))
                     .toList();
         } catch (IOException ioException) {
@@ -39,33 +44,146 @@ public final class ProjectCatalogService {
 
     public ProjectReference openProject(Path projectPath) {
         final Path normalized = Objects.requireNonNull(projectPath, "projectPath").toAbsolutePath().normalize();
-        if (!Files.isDirectory(normalized)) {
+        return openProjectManifest(manifestPath(normalized));
-            throw new IllegalArgumentException("project directory does not exist: " + normalized);
+    }
+
+    public ProjectReference openProjectManifest(Path manifestPath) {
+        final Path normalizedManifest = Objects.requireNonNull(manifestPath, "manifestPath")
+                .toAbsolutePath()
+                .normalize();
+        if (!normalizedManifest.getFileName().toString().equals(MANIFEST_FILE_NAME)) {
+            throw new IllegalArgumentException("expected " + MANIFEST_FILE_NAME + ": " + normalizedManifest);
         }
-        return new ProjectReference(normalized.getFileName().toString(), normalized);
+        if (!Files.isRegularFile(normalizedManifest)) {
+            throw new IllegalArgumentException("project manifest not found: expected " + normalizedManifest);
+        }
+
+        final Path projectRoot = normalizedManifest.getParent();
+        if (projectRoot == null || !Files.isDirectory(projectRoot)) {
+            throw new IllegalArgumentException("project root does not exist: " + normalizedManifest);
+        }
+
+        return buildReference(projectRoot);
     }
 
     public ProjectReference createProject(String projectName) {
-        final String sanitized = sanitizeProjectName(projectName);
+        return createProject(new ProjectCreationRequest(projectName, projectsRoot, "pbs", 1, "src"));
-        if (sanitized.isBlank()) {
+    }
+
+    public ProjectReference createProject(String projectName, Path parentLocation) {
+        return createProject(new ProjectCreationRequest(projectName, parentLocation, "pbs", 1, "src"));
+    }
+
+    public ProjectReference createProject(ProjectCreationRequest request) {
+        final String displayName = Objects.requireNonNull(request.projectName(), "request.projectName").trim();
+        final String sanitized = sanitizeProjectName(displayName);
+        if (displayName.isBlank() || sanitized.isBlank()) {
             throw new IllegalArgumentException("project name must not be blank");
         }
+        final String languageId = Objects.requireNonNull(request.languageId(), "request.languageId").trim();
+        if (languageId.isBlank()) {
+            throw new IllegalArgumentException("project language must not be blank");
+        }
+        if (request.stdlib() <= 0) {
+            throw new IllegalArgumentException("project stdlib major must be positive");
+        }
 
-        final Path projectRoot = projectsRoot.resolve(sanitized).normalize();
+        final Path sourceRoot = normalizeSourceRoot(request.sourceRoot());
+        final Path normalizedParent = Objects.requireNonNull(request.parentLocation(), "request.parentLocation")
+                .toAbsolutePath()
+                .normalize();
+        if (Files.exists(normalizedParent) && !Files.isDirectory(normalizedParent)) {
+            throw new IllegalArgumentException("project location is not a directory: " + normalizedParent);
+        }
+
+        final Path projectRoot = normalizedParent.resolve(sanitized).normalize();
         if (Files.exists(projectRoot)) {
             throw new IllegalArgumentException("project already exists: " + sanitized);
         }
 
         try {
+            Files.createDirectories(normalizedParent);
             Files.createDirectories(projectRoot.resolve(".workspace"));
-            Files.createDirectories(projectRoot.resolve("src"));
+            Files.createDirectories(projectRoot.resolve(sourceRoot));
+            Files.createDirectories(projectRoot.resolve("assets"));
             Files.createDirectories(projectRoot.resolve("build"));
             Files.createDirectories(projectRoot.resolve("cartridge"));
+            Files.writeString(manifestPath(projectRoot), defaultManifest(displayName, languageId, request.stdlib()));
         } catch (IOException ioException) {
             throw new UncheckedIOException(ioException);
         }
 
-        return new ProjectReference(sanitized, projectRoot);
+        return openProject(projectRoot);
+    }
+
+    private ProjectReference buildReference(Path projectRoot) {
+        final Path normalizedRoot = projectRoot.toAbsolutePath().normalize();
+        final Path manifestPath = manifestPath(normalizedRoot);
+        final ProjectManifestSummary manifest;
+        try {
+            manifest = MAPPER.readValue(manifestPath.toFile(), ProjectManifestSummary.class);
+        } catch (IOException ioException) {
+            throw new UncheckedIOException(ioException);
+        }
+
+        if (manifest.name() == null || manifest.name().isBlank()) {
+            throw new IllegalArgumentException("project manifest missing name: " + manifestPath);
+        }
+        if (manifest.version() == null || manifest.version().isBlank()) {
+            throw new IllegalArgumentException("project manifest missing version: " + manifestPath);
+        }
+        if (manifest.language() == null || manifest.language().isBlank()) {
+            throw new IllegalArgumentException("project manifest missing language: " + manifestPath);
+        }
+        final int stdlibMajor;
+        try {
+            stdlibMajor = Integer.parseInt(Objects.requireNonNull(manifest.stdlib(), "manifest.stdlib").trim());
+        } catch (RuntimeException runtimeException) {
+            throw new IllegalArgumentException("project manifest invalid stdlib: " + manifestPath, runtimeException);
+        }
+        return new ProjectReference(
+                manifest.name().trim(),
+                manifest.version().trim(),
+                manifest.language().trim(),
+                stdlibMajor,
+                normalizedRoot);
+    }
+
+    private boolean isValidProjectRoot(Path path) {
+        return Files.isDirectory(path) && Files.isRegularFile(manifestPath(path));
+    }
+
+    private Path manifestPath(Path projectRoot) {
+        return projectRoot.resolve(MANIFEST_FILE_NAME);
+    }
+
+    private Path normalizeSourceRoot(String sourceRoot) {
+        final String raw = Objects.requireNonNull(sourceRoot, "sourceRoot").trim();
+        if (raw.isBlank()) {
+            throw new IllegalArgumentException("project source root must not be blank");
+        }
+        final Path normalized = Path.of(raw).normalize();
+        if (normalized.isAbsolute() || normalized.startsWith("..")) {
+            throw new IllegalArgumentException("project source root must be a relative project path");
+        }
+        return normalized;
+    }
+
+    private String defaultManifest(String projectName, String languageId, int stdlibMajor) {
+        return """
+                {
+                  "name": "%s",
+                  "version": "1.0.0",
+                  "language": "%s",
+                  "stdlib": "%d",
+                  "dependencies": [
+                  ]
+                }
+                """.formatted(projectName, languageId, stdlibMajor);
+    }
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    private record ProjectManifestSummary(String name, String version, String language, String stdlib) {
     }
 
     private String sanitizeProjectName(String rawName) {

prometeu-studio/src/main/java/p/studio/projects/ProjectCreationRequest.java

@@ -0,0 +1,11 @@
+package p.studio.projects;
+
+import java.nio.file.Path;
+
+public record ProjectCreationRequest(
+        String projectName,
+        Path parentLocation,
+        String languageId,
+        int stdlib,
+        String sourceRoot) {
+}

prometeu-studio/src/main/java/p/studio/projects/ProjectLanguageCatalogService.java

@@ -0,0 +1,47 @@
+package p.studio.projects;
+
+import p.studio.compiler.FrontendRegistryService;
+import p.studio.compiler.models.FrontendSpec;
+
+import java.util.Comparator;
+import java.util.List;
+import java.util.Objects;
+
+public final class ProjectLanguageCatalogService {
+    public List<ProjectLanguageTemplate> listLanguageTemplates() {
+        return FrontendRegistryService.listFrontendSpecs().stream()
+                .map(this::toTemplate)
+                .sorted(Comparator.comparing(ProjectLanguageTemplate::languageId, String.CASE_INSENSITIVE_ORDER))
+                .toList();
+    }
+
+    public ProjectLanguageTemplate getDefaultTemplate() {
+        return listLanguageTemplates().stream()
+                .findFirst()
+                .orElseThrow(() -> new IllegalStateException("no frontend languages are registered"));
+    }
+
+    private ProjectLanguageTemplate toTemplate(FrontendSpec frontendSpec) {
+        final List<String> sourceRoots = frontendSpec.getSourceRoots().stream()
+                .sorted(String.CASE_INSENSITIVE_ORDER)
+                .toList();
+        final List<ProjectLanguageTemplate.StdlibOption> stdlibOptions = frontendSpec.getStdlibVersions().stream()
+                .map(stdlib -> new ProjectLanguageTemplate.StdlibOption(stdlib.version(), stdlib.type()))
+                .sorted(Comparator.comparingInt(ProjectLanguageTemplate.StdlibOption::version))
+                .toList();
+        final ProjectLanguageTemplate.StdlibOption defaultStdlib = stdlibOptions.stream()
+                .filter(option -> option.type() == FrontendSpec.StdlibType.DEFAULT)
+                .findFirst()
+                .or(() -> stdlibOptions.stream().findFirst())
+                .orElse(new ProjectLanguageTemplate.StdlibOption(1, FrontendSpec.StdlibType.DEFAULT));
+        final String defaultSourceRoot = sourceRoots.stream()
+                .findFirst()
+                .orElse("src");
+        return new ProjectLanguageTemplate(
+                Objects.requireNonNull(frontendSpec.getLanguageId(), "frontendSpec.languageId"),
+                stdlibOptions,
+                defaultStdlib,
+                sourceRoots,
+                defaultSourceRoot);
+    }
+}

prometeu-studio/src/main/java/p/studio/projects/ProjectLanguageTemplate.java

@@ -0,0 +1,24 @@
+package p.studio.projects;
+
+import p.studio.compiler.models.FrontendSpec;
+
+import java.util.List;
+
+public record ProjectLanguageTemplate(
+        String languageId,
+        List<StdlibOption> stdlibOptions,
+        StdlibOption defaultStdlib,
+        List<String> sourceRoots,
+        String defaultSourceRoot) {
+
+    public record StdlibOption(int version, FrontendSpec.StdlibType type) {
+        @Override
+        public String toString() {
+            return switch (type) {
+                case DEFAULT -> version + " (default)";
+                case STABLE -> version + " (stable)";
+                case EXPERIMENTAL -> version + " (experimental)";
+            };
+        }
+    }
+}

prometeu-studio/src/main/java/p/studio/projects/ProjectReference.java

@@ -2,7 +2,12 @@ package p.studio.projects;
 
 import java.nio.file.Path;
 
-public record ProjectReference(String name, Path rootPath) {
+public record ProjectReference(
+        String name,
+        String version,
+        String languageId,
+        int stdlibVersion,
+        Path rootPath) {
     @Override
     public String toString() {
         return name;

prometeu-studio/src/main/java/p/studio/utilities/i18n/I18n.java

@@ -4,6 +4,7 @@ import lombok.Getter;
 
 public enum I18n {
     APP_TITLE("app.title"),
+    APP_PROJECT_TITLE("app.projectTitle"),
 
     MENU_FILE("menu.file"),
     MENU_FILE_NEWPROJECT("menu.file.newProject"),
@@ -20,10 +21,41 @@ public enum I18n {
     LAUNCHER_SUBTITLE("launcher.subtitle"),
     LAUNCHER_EXISTING_PROJECTS("launcher.existingProjects"),
     LAUNCHER_OPEN_PROJECT("launcher.openProject"),
+    LAUNCHER_ADD_PROJECT("launcher.addProject"),
+    LAUNCHER_FORGET_PROJECT("launcher.forgetProject"),
     LAUNCHER_CREATE_PROJECT("launcher.createProject"),
     LAUNCHER_PROJECT_NAME_PROMPT("launcher.projectNamePrompt"),
     LAUNCHER_CREATE_BUTTON("launcher.createButton"),
 
+    WIZARD_TITLE("wizard.title"),
+    WIZARD_BACK("wizard.back"),
+    WIZARD_NEXT("wizard.next"),
+    WIZARD_CREATE("wizard.create"),
+    WIZARD_CANCEL("wizard.cancel"),
+    WIZARD_BROWSE("wizard.browse"),
+    WIZARD_STEP_NAME_TITLE("wizard.step.name.title"),
+    WIZARD_STEP_NAME_DESCRIPTION("wizard.step.name.description"),
+    WIZARD_STEP_LANGUAGE_TITLE("wizard.step.language.title"),
+    WIZARD_STEP_LANGUAGE_DESCRIPTION("wizard.step.language.description"),
+    WIZARD_STEP_LOCATION_TITLE("wizard.step.location.title"),
+    WIZARD_STEP_LOCATION_DESCRIPTION("wizard.step.location.description"),
+    WIZARD_STEP_CONFIRM_TITLE("wizard.step.confirm.title"),
+    WIZARD_STEP_CONFIRM_DESCRIPTION("wizard.step.confirm.description"),
+    WIZARD_LANGUAGE_LABEL("wizard.language.label"),
+    WIZARD_STDLIB_LABEL("wizard.stdlib.label"),
+    WIZARD_SOURCE_ROOT_LABEL("wizard.sourceRoot.label"),
+    WIZARD_CONFIRM_NAME("wizard.confirm.name"),
+    WIZARD_CONFIRM_LANGUAGE("wizard.confirm.language"),
+    WIZARD_CONFIRM_STDLIB("wizard.confirm.stdlib"),
+    WIZARD_CONFIRM_SOURCE_ROOT("wizard.confirm.sourceRoot"),
+    WIZARD_CONFIRM_LOCATION("wizard.confirm.location"),
+    WIZARD_CONFIRM_ROOT("wizard.confirm.root"),
+    WIZARD_ERROR_NAME_REQUIRED("wizard.error.nameRequired"),
+    WIZARD_ERROR_LANGUAGE_REQUIRED("wizard.error.languageRequired"),
+    WIZARD_ERROR_STDLIB_REQUIRED("wizard.error.stdlibRequired"),
+    WIZARD_ERROR_SOURCE_ROOT_REQUIRED("wizard.error.sourceRootRequired"),
+    WIZARD_ERROR_LOCATION_REQUIRED("wizard.error.locationRequired"),
+
     TOOLBAR_PLAY("toolbar.play"),
     TOOLBAR_STOP("toolbar.stop"),
     TOOLBAR_EXPORT("toolbar.export"),

prometeu-studio/src/main/java/p/studio/window/NewProjectWizard.java

@@ -0,0 +1,339 @@
+package p.studio.window;
+
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.DirectoryChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import javafx.stage.Window;
+import p.studio.Container;
+import p.studio.projects.ProjectCatalogService;
+import p.studio.projects.ProjectCreationRequest;
+import p.studio.projects.ProjectLanguageCatalogService;
+import p.studio.projects.ProjectLanguageTemplate;
+import p.studio.projects.ProjectReference;
+import p.studio.utilities.i18n.I18n;
+
+import java.io.File;
+import java.nio.file.Path;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.atomic.AtomicReference;
+
+public final class NewProjectWizard {
+    private final ProjectCatalogService projectCatalogService;
+    private final ProjectLanguageCatalogService projectLanguageCatalogService;
+    private final Stage stage;
+    private final AtomicReference<ProjectReference> result = new AtomicReference<>();
+    private final Label stepTitle = new Label();
+    private final Label stepDescription = new Label();
+    private final VBox stepBody = new VBox(12);
+    private final Label feedbackLabel = new Label();
+    private final Button backButton = new Button();
+    private final Button nextButton = new Button();
+    private final Button createButton = new Button();
+    private final TextField projectNameField = new TextField();
+    private final TextField locationField = new TextField();
+    private final ComboBox<String> languageCombo = new ComboBox<>();
+    private final ComboBox<ProjectLanguageTemplate.StdlibOption> stdlibCombo = new ComboBox<>();
+    private final ComboBox<String> sourceRootCombo = new ComboBox<>();
+    private final Map<String, ProjectLanguageTemplate> languageTemplatesById = new LinkedHashMap<>();
+    private int stepIndex = 0;
+
+    private NewProjectWizard(Window owner, ProjectCatalogService projectCatalogService) {
+        this.projectCatalogService = Objects.requireNonNull(projectCatalogService, "projectCatalogService");
+        this.projectLanguageCatalogService = new ProjectLanguageCatalogService();
+        this.stage = new Stage();
+        stage.initOwner(owner);
+        stage.initModality(Modality.WINDOW_MODAL);
+        stage.setTitle(Container.i18n().text(I18n.WIZARD_TITLE));
+        stage.setScene(new Scene(buildRoot(), 700, 420));
+        stage.getScene().getStylesheets().add(Container.theme().getDefaultTheme());
+
+        projectNameField.promptTextProperty().bind(Container.i18n().bind(I18n.LAUNCHER_PROJECT_NAME_PROMPT));
+        locationField.setText(projectCatalogService.projectsRoot().toString());
+        initializeLanguageTemplates();
+
+        renderStep();
+    }
+
+    public static Optional<ProjectReference> showAndWait(Window owner, ProjectCatalogService projectCatalogService) {
+        final NewProjectWizard wizard = new NewProjectWizard(owner, projectCatalogService);
+        wizard.stage.showAndWait();
+        return Optional.ofNullable(wizard.result.get());
+    }
+
+    private VBox buildRoot() {
+        stepTitle.getStyleClass().add("studio-launcher-section-title");
+        stepDescription.getStyleClass().add("studio-launcher-subtitle");
+        feedbackLabel.getStyleClass().add("studio-launcher-feedback");
+        feedbackLabel.setWrapText(true);
+
+        backButton.textProperty().bind(Container.i18n().bind(I18n.WIZARD_BACK));
+        backButton.setOnAction(ignored -> goBack());
+
+        nextButton.textProperty().bind(Container.i18n().bind(I18n.WIZARD_NEXT));
+        nextButton.setOnAction(ignored -> goNext());
+
+        createButton.textProperty().bind(Container.i18n().bind(I18n.WIZARD_CREATE));
+        createButton.setOnAction(ignored -> finishCreate());
+
+        final Button cancelButton = new Button();
+        cancelButton.textProperty().bind(Container.i18n().bind(I18n.WIZARD_CANCEL));
+        cancelButton.setOnAction(ignored -> stage.close());
+
+        final HBox actions = new HBox(12, backButton, nextButton, createButton, cancelButton);
+        actions.setAlignment(Pos.CENTER_RIGHT);
+
+        final VBox root = new VBox(16, stepTitle, stepDescription, stepBody, feedbackLabel, actions);
+        root.setPadding(new Insets(24));
+        VBox.setVgrow(stepBody, Priority.ALWAYS);
+        return root;
+    }
+
+    private void renderStep() {
+        feedbackLabel.setText("");
+        backButton.setDisable(stepIndex == 0);
+        nextButton.setVisible(stepIndex < 3);
+        nextButton.setManaged(stepIndex < 3);
+        createButton.setVisible(stepIndex == 3);
+        createButton.setManaged(stepIndex == 3);
+
+        switch (stepIndex) {
+            case 0 -> renderNameStep();
+            case 1 -> renderLanguageStep();
+            case 2 -> renderLocationStep();
+            case 3 -> renderConfirmStep();
+            default -> throw new IllegalStateException("unknown wizard step: " + stepIndex);
+        }
+    }
+
+    private void renderNameStep() {
+        stepTitle.textProperty().unbind();
+        stepDescription.textProperty().unbind();
+        stepTitle.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_NAME_TITLE));
+        stepDescription.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_NAME_DESCRIPTION));
+        stepBody.getChildren().setAll(projectNameField);
+    }
+
+    private void renderLanguageStep() {
+        stepTitle.textProperty().unbind();
+        stepDescription.textProperty().unbind();
+        stepTitle.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_LANGUAGE_TITLE));
+        stepDescription.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_LANGUAGE_DESCRIPTION));
+
+        final Label languageLabel = new Label(Container.i18n().text(I18n.WIZARD_LANGUAGE_LABEL));
+        final Label stdlibLabel = new Label(Container.i18n().text(I18n.WIZARD_STDLIB_LABEL));
+        final Label sourceRootLabel = new Label(Container.i18n().text(I18n.WIZARD_SOURCE_ROOT_LABEL));
+
+        languageCombo.setMaxWidth(Double.MAX_VALUE);
+        stdlibCombo.setMaxWidth(Double.MAX_VALUE);
+        sourceRootCombo.setMaxWidth(Double.MAX_VALUE);
+
+        final VBox languageBox = new VBox(6, languageLabel, languageCombo);
+        final VBox stdlibBox = new VBox(6, stdlibLabel, stdlibCombo);
+        final VBox sourceRootBox = new VBox(6, sourceRootLabel, sourceRootCombo);
+        stepBody.getChildren().setAll(languageBox, stdlibBox, sourceRootBox);
+    }
+
+    private void renderLocationStep() {
+        stepTitle.textProperty().unbind();
+        stepDescription.textProperty().unbind();
+        stepTitle.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_LOCATION_TITLE));
+        stepDescription.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_LOCATION_DESCRIPTION));
+
+        final Button browseButton = new Button();
+        browseButton.textProperty().bind(Container.i18n().bind(I18n.WIZARD_BROWSE));
+        browseButton.setOnAction(ignored -> browseForLocation());
+
+        final HBox row = new HBox(12, locationField, browseButton);
+        HBox.setHgrow(locationField, Priority.ALWAYS);
+        row.setAlignment(Pos.CENTER_LEFT);
+        stepBody.getChildren().setAll(row);
+    }
+
+    private void renderConfirmStep() {
+        stepTitle.textProperty().unbind();
+        stepDescription.textProperty().unbind();
+        stepTitle.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_CONFIRM_TITLE));
+        stepDescription.textProperty().bind(Container.i18n().bind(I18n.WIZARD_STEP_CONFIRM_DESCRIPTION));
+
+        final Label projectName = new Label(Container.i18n().format(I18n.WIZARD_CONFIRM_NAME, sanitizedName()));
+        final Label projectLanguage = new Label(Container.i18n().format(I18n.WIZARD_CONFIRM_LANGUAGE, selectedLanguageId()));
+        final Label projectStdlib = new Label(Container.i18n().format(I18n.WIZARD_CONFIRM_STDLIB, selectedStdlibLabel()));
+        final Label projectSourceRoot = new Label(Container.i18n().format(I18n.WIZARD_CONFIRM_SOURCE_ROOT, selectedSourceRoot()));
+        final Label projectLocation = new Label(Container.i18n().format(I18n.WIZARD_CONFIRM_LOCATION, locationField.getText().trim()));
+        final Label projectRoot = new Label(Container.i18n().format(I18n.WIZARD_CONFIRM_ROOT, resolvedProjectRoot().toString()));
+
+        stepBody.getChildren().setAll(
+                projectName,
+                projectLanguage,
+                projectStdlib,
+                projectSourceRoot,
+                projectLocation,
+                projectRoot);
+    }
+
+    private void goBack() {
+        if (stepIndex == 0) {
+            return;
+        }
+        stepIndex -= 1;
+        renderStep();
+    }
+
+    private void goNext() {
+        if (!validateCurrentStep()) {
+            return;
+        }
+        stepIndex += 1;
+        renderStep();
+    }
+
+    private boolean validateCurrentStep() {
+        return switch (stepIndex) {
+            case 0 -> validateName();
+            case 1 -> validateLanguageSettings();
+            case 2 -> validateLocation();
+            default -> true;
+        };
+    }
+
+    private boolean validateName() {
+        if (sanitizedName().isBlank()) {
+            feedbackLabel.setText(Container.i18n().text(I18n.WIZARD_ERROR_NAME_REQUIRED));
+            return false;
+        }
+        return true;
+    }
+
+    private boolean validateLanguageSettings() {
+        if (selectedLanguageId().isBlank()) {
+            feedbackLabel.setText(Container.i18n().text(I18n.WIZARD_ERROR_LANGUAGE_REQUIRED));
+            return false;
+        }
+        if (selectedSourceRoot().isBlank()) {
+            feedbackLabel.setText(Container.i18n().text(I18n.WIZARD_ERROR_SOURCE_ROOT_REQUIRED));
+            return false;
+        }
+        if (selectedStdlib() == null) {
+            feedbackLabel.setText(Container.i18n().text(I18n.WIZARD_ERROR_STDLIB_REQUIRED));
+            return false;
+        }
+        return true;
+    }
+
+    private boolean validateLocation() {
+        final String rawLocation = locationField.getText().trim();
+        if (rawLocation.isBlank()) {
+            feedbackLabel.setText(Container.i18n().text(I18n.WIZARD_ERROR_LOCATION_REQUIRED));
+            return false;
+        }
+        try {
+            Path.of(rawLocation);
+        } catch (RuntimeException runtimeException) {
+            feedbackLabel.setText(runtimeException.getMessage());
+            return false;
+        }
+        return true;
+    }
+
+    private void finishCreate() {
+        if (!validateName() || !validateLanguageSettings() || !validateLocation()) {
+            return;
+        }
+
+        try {
+            result.set(projectCatalogService.createProject(new ProjectCreationRequest(
+                    projectNameField.getText(),
+                    Path.of(locationField.getText().trim()),
+                    selectedLanguageId(),
+                    selectedStdlib().version(),
+                    selectedSourceRoot())));
+            stage.close();
+        } catch (IllegalArgumentException exception) {
+            feedbackLabel.setText(exception.getMessage());
+        }
+    }
+
+    private void browseForLocation() {
+        final DirectoryChooser chooser = new DirectoryChooser();
+        chooser.setTitle(Container.i18n().text(I18n.WIZARD_BROWSE));
+
+        final String currentText = locationField.getText().trim();
+        if (!currentText.isBlank()) {
+            final File currentDirectory = Path.of(currentText).toFile();
+            if (currentDirectory.isDirectory()) {
+                chooser.setInitialDirectory(currentDirectory);
+            }
+        }
+
+        final File selected = chooser.showDialog(stage);
+        if (selected != null) {
+            locationField.setText(selected.toPath().toAbsolutePath().normalize().toString());
+        }
+    }
+
+    private String sanitizedName() {
+        return projectNameField.getText() == null ? "" : projectNameField.getText().trim();
+    }
+
+    private void initializeLanguageTemplates() {
+        final List<ProjectLanguageTemplate> templates = projectLanguageCatalogService.listLanguageTemplates();
+        for (ProjectLanguageTemplate template : templates) {
+            languageTemplatesById.put(template.languageId(), template);
+        }
+        languageCombo.getItems().setAll(languageTemplatesById.keySet());
+        languageCombo.getSelectionModel().selectedItemProperty().addListener((ignored, oldValue, newValue) -> applyLanguageTemplate(newValue));
+        if (!templates.isEmpty()) {
+            languageCombo.getSelectionModel().select(projectLanguageCatalogService.getDefaultTemplate().languageId());
+        }
+    }
+
+    private void applyLanguageTemplate(String languageId) {
+        final ProjectLanguageTemplate template = languageTemplatesById.get(languageId);
+        if (template == null) {
+            stdlibCombo.getItems().clear();
+            stdlibCombo.getSelectionModel().clearSelection();
+            sourceRootCombo.getItems().clear();
+            sourceRootCombo.getSelectionModel().clearSelection();
+            return;
+        }
+        stdlibCombo.getItems().setAll(template.stdlibOptions());
+        stdlibCombo.getSelectionModel().select(template.defaultStdlib());
+        sourceRootCombo.getItems().setAll(template.sourceRoots());
+        sourceRootCombo.getSelectionModel().select(template.defaultSourceRoot());
+    }
+
+    private String selectedLanguageId() {
+        return languageCombo.getValue() == null ? "" : languageCombo.getValue().trim();
+    }
+
+    private String selectedSourceRoot() {
+        return sourceRootCombo.getValue() == null ? "" : sourceRootCombo.getValue().trim();
+    }
+
+    private ProjectLanguageTemplate.StdlibOption selectedStdlib() {
+        return stdlibCombo.getValue();
+    }
+
+    private String selectedStdlibLabel() {
+        final ProjectLanguageTemplate.StdlibOption selectedStdlib = selectedStdlib();
+        return selectedStdlib == null ? "" : selectedStdlib.toString();
+    }
+
+    private Path resolvedProjectRoot() {
+        return Path.of(locationField.getText().trim()).toAbsolutePath().normalize().resolve(sanitizedName());
+    }
+}

prometeu-studio/src/main/java/p/studio/window/ProjectLauncherView.java

@@ -5,43 +5,65 @@ import javafx.geometry.Insets;
 import javafx.geometry.Pos;
 import javafx.scene.control.Button;
 import javafx.scene.control.Label;
+import javafx.scene.control.ListCell;
 import javafx.scene.control.ListView;
-import javafx.scene.control.TextField;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Priority;
+import javafx.scene.layout.StackPane;
 import javafx.scene.layout.VBox;
+import javafx.scene.input.MouseButton;
+import javafx.stage.FileChooser;
 import p.studio.Container;
+import p.studio.projects.KnownProjectsService;
 import p.studio.projects.ProjectCatalogService;
 import p.studio.projects.ProjectReference;
 import p.studio.utilities.i18n.I18n;
 
+import java.io.File;
+import java.nio.file.Path;
 import java.util.Objects;
 import java.util.function.Consumer;
 
 public final class ProjectLauncherView extends BorderPane {
+    private final KnownProjectsService knownProjectsService;
     private final ProjectCatalogService projectCatalogService;
     private final Consumer<ProjectReference> onOpenProject;
+    private final Consumer<ProjectReference> onAddProject;
     private final Consumer<ProjectReference> onCreateProject;
+    private final Consumer<ProjectReference> onForgetProject;
     private final ListView<ProjectReference> projectList = new ListView<>();
-    private final TextField projectNameField = new TextField();
     private final Label feedbackLabel = new Label();
 
     public ProjectLauncherView(
+            KnownProjectsService knownProjectsService,
             ProjectCatalogService projectCatalogService,
             Consumer<ProjectReference> onOpenProject,
-            Consumer<ProjectReference> onCreateProject) {
+            Consumer<ProjectReference> onAddProject,
+            Consumer<ProjectReference> onCreateProject,
+            Consumer<ProjectReference> onForgetProject) {
+        this.knownProjectsService = Objects.requireNonNull(knownProjectsService, "knownProjectsService");
         this.projectCatalogService = Objects.requireNonNull(projectCatalogService, "projectCatalogService");
         this.onOpenProject = Objects.requireNonNull(onOpenProject, "onOpenProject");
+        this.onAddProject = Objects.requireNonNull(onAddProject, "onAddProject");
         this.onCreateProject = Objects.requireNonNull(onCreateProject, "onCreateProject");
+        this.onForgetProject = Objects.requireNonNull(onForgetProject, "onForgetProject");
 
         getStyleClass().add("studio-project-launcher");
-        setPadding(new Insets(24));
+        setPadding(new Insets(16));
-        setCenter(buildContent());
+        setCenter(buildCenteredContent());
 
         reloadProjects();
     }
 
+    private StackPane buildCenteredContent() {
+        final VBox content = buildContent();
+        final StackPane wrapper = new StackPane(content);
+        wrapper.setPadding(new Insets(8, 12, 8, 12));
+        StackPane.setAlignment(content, Pos.CENTER);
+        return wrapper;
+    }
+
     private VBox buildContent() {
         final Label title = new Label();
         title.textProperty().bind(Container.i18n().bind(I18n.LAUNCHER_TITLE));
@@ -56,6 +78,12 @@ public final class ProjectLauncherView extends BorderPane {
         listTitle.getStyleClass().add("studio-launcher-section-title");
 
         projectList.getStyleClass().add("studio-project-list");
+        projectList.setCellFactory(ignored -> new ProjectReferenceListCell());
+        projectList.setOnMouseClicked(event -> {
+            if (event.getButton() == MouseButton.PRIMARY && event.getClickCount() == 2) {
+                openSelectedProject();
+            }
+        });
         VBox.setVgrow(projectList, Priority.ALWAYS);
 
         final Button openButton = new Button();
@@ -63,27 +91,33 @@ public final class ProjectLauncherView extends BorderPane {
         openButton.disableProperty().bind(projectList.getSelectionModel().selectedItemProperty().isNull());
         openButton.setOnAction(ignored -> openSelectedProject());
 
-        final HBox openRow = new HBox(openButton);
+        final Button addButton = new Button();
+        addButton.textProperty().bind(Container.i18n().bind(I18n.LAUNCHER_ADD_PROJECT));
+        addButton.setOnAction(ignored -> addExistingProject());
+
+        final Button forgetButton = new Button();
+        forgetButton.textProperty().bind(Container.i18n().bind(I18n.LAUNCHER_FORGET_PROJECT));
+        forgetButton.disableProperty().bind(projectList.getSelectionModel().selectedItemProperty().isNull());
+        forgetButton.setOnAction(ignored -> forgetSelectedProject());
+
+        final HBox openRow = new HBox(10, openButton, addButton, forgetButton);
         openRow.setAlignment(Pos.CENTER_LEFT);
 
         final Label createTitle = new Label();
         createTitle.textProperty().bind(Container.i18n().bind(I18n.LAUNCHER_CREATE_PROJECT));
         createTitle.getStyleClass().add("studio-launcher-section-title");
 
-        projectNameField.promptTextProperty().bind(Container.i18n().bind(I18n.LAUNCHER_PROJECT_NAME_PROMPT));
-        HBox.setHgrow(projectNameField, Priority.ALWAYS);
-
         final Button createButton = new Button();
         createButton.textProperty().bind(Container.i18n().bind(I18n.LAUNCHER_CREATE_BUTTON));
-        createButton.setOnAction(ignored -> createProject());
+        createButton.setOnAction(ignored -> openCreateWizard());
 
-        final HBox createRow = new HBox(12, projectNameField, createButton);
+        final HBox createRow = new HBox(10, createButton);
         createRow.setAlignment(Pos.CENTER_LEFT);
 
         feedbackLabel.getStyleClass().add("studio-launcher-feedback");
         feedbackLabel.setWrapText(true);
 
-        final VBox content = new VBox(16,
+        final VBox content = new VBox(12,
                 title,
                 subtitle,
                 listTitle,
@@ -92,12 +126,12 @@ public final class ProjectLauncherView extends BorderPane {
                 createTitle,
                 createRow,
                 feedbackLabel);
-        content.setMaxWidth(720);
+        content.setMaxWidth(520);
         return content;
     }
 
-    private void reloadProjects() {
+    public void reloadProjects() {
-        projectList.setItems(FXCollections.observableArrayList(projectCatalogService.listProjects()));
+        projectList.setItems(FXCollections.observableArrayList(knownProjectsService.listKnownProjects()));
         if (!projectList.getItems().isEmpty()) {
             projectList.getSelectionModel().selectFirst();
         }
@@ -115,18 +149,87 @@ public final class ProjectLauncherView extends BorderPane {
         onOpenProject.accept(selected);
     }
 
-    private void createProject() {
+    private void forgetSelectedProject() {
-        try {
+        final ProjectReference selected = projectList.getSelectionModel().getSelectedItem();
-            final ProjectReference created = projectCatalogService.createProject(projectNameField.getText());
+        if (selected == null) {
-            projectNameField.clear();
+            feedbackLabel.setText("");
+            return;
+        }
+
+        feedbackLabel.textProperty().unbind();
+        feedbackLabel.setText("");
+        onForgetProject.accept(selected);
+    }
+
+    private void openCreateWizard() {
+        NewProjectWizard.showAndWait(getScene().getWindow(), projectCatalogService).ifPresent(created -> {
             reloadProjects();
             projectList.getSelectionModel().select(created);
             feedbackLabel.textProperty().unbind();
             feedbackLabel.setText("");
             onCreateProject.accept(created);
-        } catch (IllegalArgumentException illegalArgumentException) {
+        });
+    }
+
+    private void addExistingProject() {
+        final FileChooser chooser = new FileChooser();
+        chooser.setTitle(Container.i18n().text(I18n.LAUNCHER_ADD_PROJECT));
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Prometeu Project", "prometeu.json"));
+        chooser.setInitialFileName("prometeu.json");
+        final File initialDirectory = projectCatalogService.projectsRoot().toFile();
+        if (initialDirectory.isDirectory()) {
+            chooser.setInitialDirectory(initialDirectory);
+        }
+
+        final File selected = chooser.showOpenDialog(getScene().getWindow());
+        if (selected == null) {
+            return;
+        }
+
+        try {
+            final ProjectReference project = projectCatalogService.openProjectManifest(Path.of(selected.toURI()));
+            onAddProject.accept(project);
+            reloadProjects();
+            projectList.getSelectionModel().select(project);
             feedbackLabel.textProperty().unbind();
-            feedbackLabel.setText(illegalArgumentException.getMessage());
+            feedbackLabel.setText("");
+        } catch (IllegalArgumentException exception) {
+            feedbackLabel.textProperty().unbind();
+            feedbackLabel.setText(exception.getMessage());
+        }
+    }
+
+    private static final class ProjectReferenceListCell extends ListCell<ProjectReference> {
+        private final Label nameLabel = new Label();
+        private final Label metadataLabel = new Label();
+        private final Label pathLabel = new Label();
+        private final VBox content = new VBox(3, nameLabel, metadataLabel, pathLabel);
+
+        private ProjectReferenceListCell() {
+            nameLabel.getStyleClass().add("studio-project-list-name");
+            metadataLabel.getStyleClass().add("studio-project-list-metadata");
+            pathLabel.getStyleClass().add("studio-project-list-path");
+            metadataLabel.setWrapText(true);
+            pathLabel.setWrapText(true);
+        }
+
+        @Override
+        protected void updateItem(ProjectReference item, boolean empty) {
+            super.updateItem(item, empty);
+            if (empty || item == null) {
+                setText(null);
+                setGraphic(null);
+                return;
+            }
+
+            nameLabel.setText(item.name());
+            metadataLabel.setText("v%s  |  %s  |  stdlib %d".formatted(
+                    item.version(),
+                    item.languageId(),
+                    item.stdlibVersion()));
+            pathLabel.setText(item.rootPath().toString());
+            setText(null);
+            setGraphic(content);
         }
     }
 }

prometeu-studio/src/main/java/p/studio/window/StudioRootView.java

@@ -1,53 +0,0 @@
-package p.studio.window;
-
-import javafx.scene.layout.StackPane;
-import p.studio.Container;
-import p.studio.events.StudioProjectCreatedEvent;
-import p.studio.events.StudioProjectOpenedEvent;
-import p.studio.projects.ProjectCatalogService;
-import p.studio.projects.ProjectReference;
-
-import java.nio.file.Path;
-
-public final class StudioRootView extends StackPane {
-    private final ProjectCatalogService projectCatalogService = new ProjectCatalogService(resolveDefaultProjectsRoot());
-
-    public StudioRootView() {
-        showLauncher();
-    }
-
-    private void showLauncher() {
-        getChildren().setAll(new ProjectLauncherView(
-                projectCatalogService,
-                this::openProject,
-                this::createProject));
-    }
-
-    private void openProject(ProjectReference projectReference) {
-        final ProjectReference opened = projectCatalogService.openProject(projectReference.rootPath());
-        Container.events().publish(new StudioProjectOpenedEvent(opened));
-        showShell(opened);
-    }
-
-    private void createProject(ProjectReference projectReference) {
-        Container.events().publish(new StudioProjectCreatedEvent(projectReference));
-        Container.events().publish(new StudioProjectOpenedEvent(projectReference));
-        showShell(projectReference);
-    }
-
-    private void showShell(ProjectReference projectReference) {
-        getChildren().setAll(new MainView(projectReference));
-    }
-
-    private Path resolveDefaultProjectsRoot() {
-        Path cursor = Path.of(System.getProperty("user.dir")).toAbsolutePath().normalize();
-        while (cursor != null) {
-            if (cursor.resolve("settings.gradle.kts").toFile().exists()
-                    && cursor.resolve("test-projects").toFile().exists()) {
-                return cursor.resolve("test-projects");
-            }
-            cursor = cursor.getParent();
-        }
-        return Path.of("test-projects").toAbsolutePath().normalize();
-    }
-}

prometeu-studio/src/main/java/p/studio/window/StudioWindowCoordinator.java

@@ -0,0 +1,128 @@
+package p.studio.window;
+
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+import p.studio.Container;
+import p.studio.events.StudioProjectCreatedEvent;
+import p.studio.events.StudioProjectOpenedEvent;
+import p.studio.projects.KnownProjectsService;
+import p.studio.projects.ProjectCatalogService;
+import p.studio.projects.ProjectReference;
+import p.studio.utilities.i18n.I18n;
+
+import java.nio.file.Path;
+import java.util.Objects;
+
+public final class StudioWindowCoordinator {
+    private static final double LAUNCHER_WIDTH = 760;
+    private static final double LAUNCHER_HEIGHT = 750;
+    private static final double PROJECT_WIDTH = 1280;
+    private static final double PROJECT_HEIGHT = 840;
+
+    private final Stage launcherStage;
+    private final ProjectCatalogService projectCatalogService;
+    private final KnownProjectsService knownProjectsService;
+    private final WindowStateService windowStateService;
+    private final ProjectLauncherView launcherView;
+
+    public StudioWindowCoordinator(Stage launcherStage) {
+        this.launcherStage = Objects.requireNonNull(launcherStage, "launcherStage");
+        this.projectCatalogService = new ProjectCatalogService(resolveDefaultProjectsRoot());
+        this.knownProjectsService = new KnownProjectsService(resolveKnownProjectsStorage(), projectCatalogService);
+        this.windowStateService = new WindowStateService(resolveWindowStateStorage());
+        this.launcherView = new ProjectLauncherView(
+                knownProjectsService,
+                projectCatalogService,
+                this::openProject,
+                this::addProject,
+                this::createProject,
+                this::forgetProject);
+    }
+
+    public void showLauncher() {
+        final Scene scene = new Scene(launcherView, LAUNCHER_WIDTH, LAUNCHER_HEIGHT);
+        scene.getStylesheets().add(Container.theme().getDefaultTheme());
+
+        launcherStage.titleProperty().bind(Container.i18n().bind(I18n.APP_TITLE));
+        launcherStage.setScene(scene);
+        windowStateService.installLauncherState(launcherStage, LAUNCHER_WIDTH, LAUNCHER_HEIGHT);
+        launcherStage.setResizable(false);
+        launcherStage.setWidth(LAUNCHER_WIDTH);
+        launcherStage.setHeight(LAUNCHER_HEIGHT);
+        launcherStage.setMinWidth(LAUNCHER_WIDTH);
+        launcherStage.setMaxWidth(LAUNCHER_WIDTH);
+        launcherStage.setMinHeight(LAUNCHER_HEIGHT);
+        launcherStage.setMaxHeight(LAUNCHER_HEIGHT);
+        launcherStage.show();
+        launcherStage.centerOnScreen();
+        launcherStage.toFront();
+    }
+
+    private void openProject(ProjectReference projectReference) {
+        final ProjectReference opened = projectCatalogService.openProject(projectReference.rootPath());
+        knownProjectsService.remember(opened);
+        Container.events().publish(new StudioProjectOpenedEvent(opened));
+        openProjectWindow(opened);
+    }
+
+    private void createProject(ProjectReference projectReference) {
+        knownProjectsService.remember(projectReference);
+        Container.events().publish(new StudioProjectCreatedEvent(projectReference));
+        Container.events().publish(new StudioProjectOpenedEvent(projectReference));
+        openProjectWindow(projectReference);
+    }
+
+    private void addProject(ProjectReference projectReference) {
+        knownProjectsService.remember(projectReference);
+        launcherView.reloadProjects();
+    }
+
+    private void forgetProject(ProjectReference projectReference) {
+        knownProjectsService.forget(projectReference);
+        launcherView.reloadProjects();
+    }
+
+    private void openProjectWindow(ProjectReference projectReference) {
+        final Stage projectStage = new Stage();
+        final Scene scene = new Scene(new MainView(projectReference), PROJECT_WIDTH, PROJECT_HEIGHT);
+        scene.getStylesheets().add(Container.theme().getDefaultTheme());
+
+        projectStage.setTitle(Container.i18n().format(I18n.APP_PROJECT_TITLE, projectReference.name()));
+        projectStage.setScene(scene);
+        windowStateService.installProjectShellState(projectStage, projectReference, PROJECT_WIDTH, PROJECT_HEIGHT);
+        projectStage.setOnHidden(ignored -> {
+            launcherView.reloadProjects();
+            launcherStage.show();
+            launcherStage.centerOnScreen();
+            launcherStage.toFront();
+        });
+
+        launcherStage.hide();
+        projectStage.show();
+        projectStage.toFront();
+    }
+
+    private Path resolveDefaultProjectsRoot() {
+        Path cursor = Path.of(System.getProperty("user.dir")).toAbsolutePath().normalize();
+        while (cursor != null) {
+            if (cursor.resolve("settings.gradle.kts").toFile().exists()
+                    && cursor.resolve("test-projects").toFile().exists()) {
+                return cursor.resolve("test-projects");
+            }
+            cursor = cursor.getParent();
+        }
+        return Path.of("test-projects").toAbsolutePath().normalize();
+    }
+
+    private Path resolveKnownProjectsStorage() {
+        return Path.of(System.getProperty("user.home"), ".prometeu-studio", "known-projects.txt")
+                .toAbsolutePath()
+                .normalize();
+    }
+
+    private Path resolveWindowStateStorage() {
+        return Path.of(System.getProperty("user.home"), ".prometeu-studio", "window-state.json")
+                .toAbsolutePath()
+                .normalize();
+    }
+}

prometeu-studio/src/main/java/p/studio/window/WindowStateService.java

@@ -0,0 +1,133 @@
+package p.studio.window;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import javafx.application.Platform;
+import javafx.stage.Stage;
+import p.studio.projects.ProjectReference;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+
+public final class WindowStateService {
+    private static final ObjectMapper MAPPER = new ObjectMapper()
+            .enable(SerializationFeature.INDENT_OUTPUT);
+
+    private final Path storageFile;
+
+    public WindowStateService(Path storageFile) {
+        this.storageFile = Objects.requireNonNull(storageFile, "storageFile").toAbsolutePath().normalize();
+    }
+
+    public void installLauncherState(Stage stage, double defaultWidth, double defaultHeight) {
+        final WindowStateRecord launcherState = loadState().launcher();
+        stage.setWidth(defaultWidth);
+        stage.setHeight(defaultHeight);
+        if (launcherState != null && launcherState.maximized()) {
+            Platform.runLater(() -> stage.setMaximized(false));
+        }
+
+        stage.maximizedProperty().addListener((ignored, oldValue, newValue) -> {
+            if (Boolean.TRUE.equals(newValue)) {
+                Platform.runLater(() -> stage.setMaximized(false));
+            }
+        });
+        stage.fullScreenProperty().addListener((ignored, oldValue, newValue) -> {
+            if (Boolean.TRUE.equals(newValue)) {
+                Platform.runLater(() -> stage.setFullScreen(false));
+            }
+        });
+    }
+
+    public void installProjectShellState(
+            Stage stage,
+            ProjectReference projectReference,
+            double defaultWidth,
+            double defaultHeight) {
+        final String projectKey = normalizeProjectKey(projectReference);
+        final WindowStateRecord state = loadState().projects().get(projectKey);
+        applyState(stage, state, defaultWidth, defaultHeight);
+
+        stage.xProperty().addListener((ignored, oldValue, newValue) -> saveProjectState(projectKey, stage));
+        stage.yProperty().addListener((ignored, oldValue, newValue) -> saveProjectState(projectKey, stage));
+        stage.widthProperty().addListener((ignored, oldValue, newValue) -> saveProjectState(projectKey, stage));
+        stage.heightProperty().addListener((ignored, oldValue, newValue) -> saveProjectState(projectKey, stage));
+        stage.maximizedProperty().addListener((ignored, oldValue, newValue) -> saveProjectState(projectKey, stage));
+    }
+
+    private void applyState(Stage stage, WindowStateRecord state, double defaultWidth, double defaultHeight) {
+        stage.setWidth(state != null && state.width() > 0 ? state.width() : defaultWidth);
+        stage.setHeight(state != null && state.height() > 0 ? state.height() : defaultHeight);
+        if (state != null && !Double.isNaN(state.x())) {
+            stage.setX(state.x());
+        }
+        if (state != null && !Double.isNaN(state.y())) {
+            stage.setY(state.y());
+        }
+        if (state != null && state.maximized()) {
+            stage.setMaximized(true);
+        }
+    }
+
+    private void saveProjectState(String projectKey, Stage stage) {
+        final WindowStateFile file = loadState();
+        file.projects().put(projectKey, new WindowStateRecord(
+                stage.getX(),
+                stage.getY(),
+                stage.getWidth(),
+                stage.getHeight(),
+                stage.isMaximized()));
+        storeState(file);
+    }
+
+    private WindowStateFile loadState() {
+        if (!Files.isRegularFile(storageFile)) {
+            return WindowStateFile.empty();
+        }
+
+        try {
+            final WindowStateFile loaded = MAPPER.readValue(storageFile.toFile(), WindowStateFile.class);
+            return loaded == null ? WindowStateFile.empty() : loaded.normalize();
+        } catch (IOException ioException) {
+            throw new UncheckedIOException(ioException);
+        }
+    }
+
+    private void storeState(WindowStateFile file) {
+        try {
+            Files.createDirectories(storageFile.getParent());
+            MAPPER.writeValue(storageFile.toFile(), file.normalize());
+        } catch (IOException ioException) {
+            throw new UncheckedIOException(ioException);
+        }
+    }
+
+    private String normalizeProjectKey(ProjectReference projectReference) {
+        return Objects.requireNonNull(projectReference, "projectReference")
+                .rootPath()
+                .toAbsolutePath()
+                .normalize()
+                .toString();
+    }
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    private record WindowStateFile(WindowStateRecord launcher, Map<String, WindowStateRecord> projects) {
+        private static WindowStateFile empty() {
+            return new WindowStateFile(null, new LinkedHashMap<>());
+        }
+
+        private WindowStateFile normalize() {
+            return new WindowStateFile(launcher, projects == null ? new LinkedHashMap<>() : new LinkedHashMap<>(projects));
+        }
+    }
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    private record WindowStateRecord(double x, double y, double width, double height, boolean maximized) {
+    }
+}

prometeu-studio/src/main/resources/i18n/messages.properties

@@ -1,4 +1,5 @@
 app.title=Prometeu Studio
+app.projectTitle=Prometeu Studio - {0}
 
 menu.file=File
 menu.file.newProject=New Project
@@ -13,9 +14,39 @@ launcher.title=Projects
 launcher.subtitle=Open an existing project or create a new one to enter the Studio shell.
 launcher.existingProjects=Existing Projects
 launcher.openProject=Open Project
+launcher.addProject=Add Project
+launcher.forgetProject=Forget Project
 launcher.createProject=Create New Project
 launcher.projectNamePrompt=Project name
 launcher.createButton=Create
+wizard.title=New Project Wizard
+wizard.back=Back
+wizard.next=Next
+wizard.create=Create Project
+wizard.cancel=Cancel
+wizard.browse=Browse
+wizard.step.name.title=Project Name
+wizard.step.name.description=Choose the new project's name.
+wizard.step.language.title=Language and Project Layout
+wizard.step.language.description=Choose the language, stdlib version, and default source root for the new project.
+wizard.step.location.title=Project Location
+wizard.step.location.description=Choose the parent directory where the project will be created.
+wizard.step.confirm.title=Confirm Project Creation
+wizard.step.confirm.description=Review the project details before creating it.
+wizard.language.label=Language
+wizard.stdlib.label=Stdlib Version
+wizard.sourceRoot.label=Source Root
+wizard.confirm.name=Name: {0}
+wizard.confirm.language=Language: {0}
+wizard.confirm.stdlib=Stdlib: {0}
+wizard.confirm.sourceRoot=Source Root: {0}
+wizard.confirm.location=Location: {0}
+wizard.confirm.root=Project Root: {0}
+wizard.error.nameRequired=Project name is required.
+wizard.error.languageRequired=Project language is required.
+wizard.error.stdlibRequired=Stdlib major must be a positive integer.
+wizard.error.sourceRootRequired=Source root is required.
+wizard.error.locationRequired=Project location is required.
 
 toolbar.play=Play
 toolbar.stop=Stop

prometeu-studio/src/main/resources/themes/default-prometeu.css

@@ -73,30 +73,68 @@
 }
 
 .studio-project-launcher {
-    -fx-background-color: linear-gradient(to bottom, #191919, #101010);
+    -fx-background-color: linear-gradient(to bottom, #20242c, #14181d);
 }
 
 .studio-launcher-title {
-    -fx-font-size: 28px;
+    -fx-font-size: 24px;
     -fx-font-weight: bold;
     -fx-text-fill: #f2f2f2;
 }
 
 .studio-launcher-subtitle {
-    -fx-font-size: 14px;
+    -fx-font-size: 13px;
-    -fx-text-fill: #a6a6a6;
+    -fx-text-fill: #c3ccd6;
 }
 
 .studio-launcher-section-title {
     -fx-font-size: 15px;
     -fx-font-weight: bold;
-    -fx-text-fill: #dcdcdc;
+    -fx-text-fill: #f0f4f8;
 }
 
 .studio-project-list {
-    -fx-pref-height: 320px;
+    -fx-pref-height: 220px;
+    -fx-background-color: #0f1317;
+    -fx-control-inner-background: #0f1317;
+    -fx-background-insets: 0;
+    -fx-background-radius: 10;
+    -fx-border-color: #37414d;
+    -fx-border-radius: 10;
+    -fx-border-width: 1;
+    -fx-padding: 6;
+}
+
+.studio-project-list .list-cell {
+    -fx-background-color: transparent;
+    -fx-padding: 8 10 8 10;
+}
+
+.studio-project-list .list-cell:hover {
+    -fx-background-color: #1c2530;
+}
+
+.studio-project-list .list-cell:selected {
+    -fx-background-color: #27486a;
+    -fx-background-radius: 8;
+}
+
+.studio-project-list-name {
+    -fx-text-fill: #f7fbff;
+    -fx-font-size: 13px;
+    -fx-font-weight: bold;
+}
+
+.studio-project-list-metadata {
+    -fx-text-fill: #b8d8f7;
+    -fx-font-size: 11px;
+}
+
+.studio-project-list-path {
+    -fx-text-fill: #c0c8d2;
+    -fx-font-size: 11px;
 }
 
 .studio-launcher-feedback {
-    -fx-text-fill: #ff9b7d;
+    -fx-text-fill: #ffb08f;
 }

prometeu-studio/src/test/java/p/studio/projects/KnownProjectsServiceTest.java

@@ -0,0 +1,81 @@
+package p.studio.projects;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+final class KnownProjectsServiceTest {
+    @TempDir
+    Path tempDir;
+
+    @Test
+    void seedsKnownProjectsFromCatalogWhenStorageIsEmpty() throws Exception {
+        final Path projectsRoot = tempDir.resolve("projects");
+        Files.createDirectories(projectsRoot.resolve("alpha"));
+        Files.createDirectories(projectsRoot.resolve("beta"));
+        Files.writeString(projectsRoot.resolve("alpha").resolve("prometeu.json"), manifest("Alpha Project"));
+        Files.writeString(projectsRoot.resolve("beta").resolve("prometeu.json"), manifest("Beta Project"));
+
+        final KnownProjectsService service = new KnownProjectsService(
+                tempDir.resolve("known-projects.txt"),
+                new ProjectCatalogService(projectsRoot));
+
+        assertEquals(
+                java.util.List.of("Alpha Project", "Beta Project"),
+                service.listKnownProjects().stream().map(ProjectReference::name).toList());
+    }
+
+    @Test
+    void canForgetProjectWithoutDeletingDirectory() throws Exception {
+        final Path projectsRoot = tempDir.resolve("projects");
+        Files.createDirectories(projectsRoot.resolve("alpha"));
+        Files.writeString(projectsRoot.resolve("alpha").resolve("prometeu.json"), manifest("Alpha Project"));
+        final ProjectReference alpha = new ProjectReference("Alpha Project", "1.0.0", "pbs", 1, projectsRoot.resolve("alpha"));
+
+        final KnownProjectsService service = new KnownProjectsService(
+                tempDir.resolve("known-projects.txt"),
+                new ProjectCatalogService(projectsRoot));
+
+        service.remember(alpha);
+        service.forget(alpha);
+
+        assertEquals(java.util.List.of(), service.listKnownProjects());
+        assertEquals(true, Files.isDirectory(alpha.rootPath()));
+    }
+
+    @Test
+    void canRememberProjectAgainAfterItWasForgotten() throws Exception {
+        final Path projectsRoot = tempDir.resolve("projects");
+        Files.createDirectories(projectsRoot.resolve("alpha"));
+        Files.writeString(projectsRoot.resolve("alpha").resolve("prometeu.json"), manifest("Alpha Project"));
+        final ProjectReference alpha = new ProjectReference("Alpha Project", "1.0.0", "pbs", 1, projectsRoot.resolve("alpha"));
+
+        final KnownProjectsService service = new KnownProjectsService(
+                tempDir.resolve("known-projects.txt"),
+                new ProjectCatalogService(projectsRoot));
+
+        service.remember(alpha);
+        service.forget(alpha);
+        service.remember(alpha);
+
+        assertEquals(
+                java.util.List.of("Alpha Project"),
+                service.listKnownProjects().stream().map(ProjectReference::name).toList());
+    }
+
+    private String manifest(String name) {
+        return """
+                {
+                  "name": "%s",
+                  "version": "1.0.0",
+                  "language": "pbs",
+                  "stdlib": "1",
+                  "dependencies": []
+                }
+                """.formatted(name);
+    }
+}

prometeu-studio/src/test/java/p/studio/projects/ProjectCatalogServiceTest.java

@@ -7,6 +7,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 final class ProjectCatalogServiceTest {
@@ -17,12 +18,15 @@ final class ProjectCatalogServiceTest {
     void listsExistingProjectDirectories() throws Exception {
         Files.createDirectories(tempDir.resolve("alpha"));
         Files.createDirectories(tempDir.resolve("beta"));
+        Files.createDirectories(tempDir.resolve("scratch"));
+        Files.writeString(tempDir.resolve("alpha").resolve("prometeu.json"), manifest("Alpha Project"));
+        Files.writeString(tempDir.resolve("beta").resolve("prometeu.json"), manifest("Beta Project"));
         Files.createDirectories(tempDir.resolve("alpha").resolve("src"));
 
         final ProjectCatalogService service = new ProjectCatalogService(tempDir);
 
         assertEquals(
-                java.util.List.of("alpha", "beta"),
+                java.util.List.of("Alpha Project", "Beta Project"),
                 service.listProjects().stream().map(ProjectReference::name).toList());
     }
 
@@ -32,11 +36,92 @@ final class ProjectCatalogServiceTest {
 
         final ProjectReference project = service.createProject("My New Project");
 
-        assertEquals("my-new-project", project.name());
+        assertEquals("My New Project", project.name());
+        assertEquals("1.0.0", project.version());
+        assertEquals("pbs", project.languageId());
+        assertEquals(1, project.stdlibVersion());
         assertTrue(Files.isDirectory(project.rootPath()));
+        assertTrue(Files.isRegularFile(project.rootPath().resolve("prometeu.json")));
         assertTrue(Files.isDirectory(project.rootPath().resolve(".workspace")));
         assertTrue(Files.isDirectory(project.rootPath().resolve("src")));
         assertTrue(Files.isDirectory(project.rootPath().resolve("build")));
         assertTrue(Files.isDirectory(project.rootPath().resolve("cartridge")));
     }
+
+    @Test
+    void createsProjectInsideExplicitParentLocation() {
+        final ProjectCatalogService service = new ProjectCatalogService(tempDir.resolve("ignored-default-root"));
+        final Path customParent = tempDir.resolve("custom-projects");
+
+        final ProjectReference project = service.createProject("Wizard Project", customParent);
+
+        assertEquals("Wizard Project", project.name());
+        assertEquals("1.0.0", project.version());
+        assertEquals("pbs", project.languageId());
+        assertEquals(1, project.stdlibVersion());
+        assertEquals(customParent.resolve("wizard-project"), project.rootPath());
+        assertTrue(Files.isDirectory(project.rootPath()));
+        assertTrue(Files.isRegularFile(project.rootPath().resolve("prometeu.json")));
+        assertTrue(Files.isDirectory(project.rootPath().resolve(".workspace")));
+        assertTrue(Files.isDirectory(project.rootPath().resolve("src")));
+    }
+
+    @Test
+    void createsProjectUsingRequestedLanguageStdlibAndSourceRoot() throws Exception {
+        final ProjectCatalogService service = new ProjectCatalogService(tempDir);
+
+        final ProjectReference project = service.createProject(new ProjectCreationRequest(
+                "Wizard Layout Project",
+                tempDir,
+                "pbs",
+                7,
+                "code"));
+
+        assertEquals("Wizard Layout Project", project.name());
+        assertEquals("1.0.0", project.version());
+        assertEquals("pbs", project.languageId());
+        assertEquals(7, project.stdlibVersion());
+        assertTrue(Files.isDirectory(project.rootPath().resolve("code")));
+        assertTrue(Files.notExists(project.rootPath().resolve("src")));
+        final String manifestJson = Files.readString(project.rootPath().resolve("prometeu.json"));
+        assertTrue(manifestJson.contains("\"language\": \"pbs\""));
+        assertTrue(manifestJson.contains("\"stdlib\": \"7\""));
+    }
+
+    @Test
+    void openProjectRejectsDirectoryWithoutPrometeuManifest() throws Exception {
+        final Path invalidProject = tempDir.resolve("invalid-project");
+        Files.createDirectories(invalidProject);
+        final ProjectCatalogService service = new ProjectCatalogService(tempDir);
+
+        assertThrows(IllegalArgumentException.class, () -> service.openProject(invalidProject));
+    }
+
+    @Test
+    void openProjectUsesManifestNameInsteadOfDirectoryName() throws Exception {
+        final Path projectRoot = tempDir.resolve("folder-name");
+        Files.createDirectories(projectRoot);
+        Files.writeString(projectRoot.resolve("prometeu.json"), manifest("Display Name"));
+        final ProjectCatalogService service = new ProjectCatalogService(tempDir);
+
+        final ProjectReference project = service.openProject(projectRoot);
+
+        assertEquals("Display Name", project.name());
+        assertEquals("1.0.0", project.version());
+        assertEquals("pbs", project.languageId());
+        assertEquals(1, project.stdlibVersion());
+        assertEquals(projectRoot, project.rootPath());
+    }
+
+    private String manifest(String name) {
+        return """
+                {
+                  "name": "%s",
+                  "version": "1.0.0",
+                  "language": "pbs",
+                  "stdlib": "1",
+                  "dependencies": []
+                }
+                """.formatted(name);
+    }
 }

test-projects/tototo/prometeu.json

@@ -0,0 +1,8 @@
+{
+  "name": "tototo",
+  "version": "1.0.0",
+  "language": "pbs",
+  "stdlib": "12346789",
+  "dependencies": [
+  ]
+}

test-projects/umbelivable/prometeu.json

@@ -0,0 +1,8 @@
+{
+  "name": "umbelivable",
+  "version": "1.0.0",
+  "language": "pbs",
+  "stdlib": "1",
+  "dependencies": [
+  ]
+}