implements PLN-0067

discussion/index.ndjson

@@ -1,5 +1,5 @@
 {"type":"meta","next_id":{"DSC":33,"AGD":36,"DEC":33,"PLN":68,"LSN":47,"CLSN":1}}
-{"type":"discussion","id":"DSC-0032","status":"in_progress","ticket":"studio-new-lsp-api-and-v1-boundary","title":"Novo boundary entre lsp-api, lsp-v1 e a extensao VS Code","created_at":"2026-05-05","updated_at":"2026-05-05","tags":["studio","lsp","vscode","protocol","api","boundary"],"agendas":[{"id":"AGD-0035","file":"AGD-0035-studio-new-lsp-api-and-v1-boundary.md","status":"accepted","created_at":"2026-05-05","updated_at":"2026-05-05"}],"decisions":[{"id":"DEC-0032","file":"DEC-0032-studio-new-lsp-api-and-v1-boundary.md","status":"accepted","created_at":"2026-05-05","updated_at":"2026-05-05","ref_agenda":"AGD-0035"}],"plans":[{"id":"PLN-0065","file":"PLN-0065-lsp-boundary-and-module-scaffolding.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0032"]},{"id":"PLN-0066","file":"PLN-0066-project-scoped-lsp-server-lifecycle-in-studio.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0032"]},{"id":"PLN-0067","file":"PLN-0067-compiler-backed-dumb-lsp-server-baseline.md","status":"open","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0032"]}],"lessons":[]}
+{"type":"discussion","id":"DSC-0032","status":"in_progress","ticket":"studio-new-lsp-api-and-v1-boundary","title":"Novo boundary entre lsp-api, lsp-v1 e a extensao VS Code","created_at":"2026-05-05","updated_at":"2026-05-05","tags":["studio","lsp","vscode","protocol","api","boundary"],"agendas":[{"id":"AGD-0035","file":"AGD-0035-studio-new-lsp-api-and-v1-boundary.md","status":"accepted","created_at":"2026-05-05","updated_at":"2026-05-05"}],"decisions":[{"id":"DEC-0032","file":"DEC-0032-studio-new-lsp-api-and-v1-boundary.md","status":"accepted","created_at":"2026-05-05","updated_at":"2026-05-05","ref_agenda":"AGD-0035"}],"plans":[{"id":"PLN-0065","file":"PLN-0065-lsp-boundary-and-module-scaffolding.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0032"]},{"id":"PLN-0066","file":"PLN-0066-project-scoped-lsp-server-lifecycle-in-studio.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0032"]},{"id":"PLN-0067","file":"PLN-0067-compiler-backed-dumb-lsp-server-baseline.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0032"]}],"lessons":[]}
 {"type":"discussion","id":"DSC-0031","status":"in_progress","ticket":"studio-editor-workspace-cleanup","title":"Limpeza completa do Workspace Editor do Studio e remoção dos acoplamentos legados","created_at":"2026-05-05","updated_at":"2026-05-05","tags":["studio","editor","cleanup","vfs","lsp","migration"],"agendas":[{"id":"AGD-0034","file":"AGD-0034-vscode-editor-migration-feasibility.md","status":"accepted","created_at":"2026-05-05","updated_at":"2026-05-05"}],"decisions":[{"id":"DEC-0031","file":"DEC-0031-studio-editor-workspace-cleanup.md","status":"in_progress","created_at":"2026-05-05","updated_at":"2026-05-05","ref_agenda":"AGD-0034"}],"plans":[{"id":"PLN-0062","file":"PLN-0062-shell-session-and-state-cleanup-after-editor-removal.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0031"]},{"id":"PLN-0063","file":"PLN-0063-legacy-lsp-and-vfs-module-removal-with-runtime-preservation.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0031"]},{"id":"PLN-0064","file":"PLN-0064-normative-test-and-lesson-cleanup-for-editor-stack-removal.md","status":"done","created_at":"2026-05-05","updated_at":"2026-05-05","ref_decisions":["DEC-0031"]}],"lessons":[]}
 {"type":"discussion","id":"DSC-0030","status":"done","ticket":"studio-scene-pack-runtime-binary-contract","title":"Studio scene pack contract for runtime SCENE binary payload","created_at":"2026-04-24","updated_at":"2026-05-01","tags":["studio","packer","runtime","scene","asset-pack","binary-format","tiled"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0046","file":"discussion/lessons/DSC-0030-studio-scene-pack-runtime-binary-contract/LSN-0046-canonical-scene-owns-editorial-truth-while-pack-stays-request-driven.md","status":"done","created_at":"2026-05-01","updated_at":"2026-05-01"}]}
 {"type":"discussion","id":"DSC-0029","status":"done","ticket":"studio-frame-composer-syscall-and-sprite-alignment","title":"Studio Alignment with Runtime FrameComposer Syscalls and Sprite Composition","created_at":"2026-04-18","updated_at":"2026-04-18","tags":["studio","compiler","pbs","stdlib","runtime-alignment","abi","syscall","frame-composer","sprites"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0041","file":"discussion/lessons/DSC-0029-studio-frame-composer-syscall-and-sprite-alignment/LSN-0041-composer-must-own-public-sprite-composition.md","status":"done","created_at":"2026-04-18","updated_at":"2026-04-18"}]}

discussion/workflow/plans/PLN-0067-compiler-backed-dumb-lsp-server-baseline.md

@@ -2,9 +2,9 @@
 id: PLN-0067
 ticket: studio-new-lsp-api-and-v1-boundary
 title: Compiler-Backed Dumb LSP Server Baseline
-status: open
+status: done
 created: 2026-05-05
-completed:
+completed: 2026-05-05
 tags: [studio, lsp, compiler, baseline, protocol, vscode]
 ---
 
@@ -81,11 +81,11 @@ Establish a maintainable, compiler-backed baseline inside `lsp-v1` that keeps th
 
 ## Acceptance Criteria
 
-- [ ] `lsp-v1` talks to `compiler` through explicit bridge services.
+- [x] `lsp-v1` talks to `compiler` through explicit bridge services.
-- [ ] The baseline server behavior remains intentionally simple but structurally clean.
+- [x] The baseline server behavior remains intentionally simple but structurally clean.
-- [ ] At least one minimal end-to-end capability slice proves the final layering.
+- [x] At least one minimal end-to-end capability slice proves the final layering.
-- [ ] The extension can still connect over TCP without protocol regressions.
+- [x] The extension can still connect over TCP without protocol regressions.
-- [ ] Temporary semantic limits are explicit in tests and code structure.
+- [x] Temporary semantic limits are explicit in tests and code structure.
 
 ## Dependencies
 

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/compiler/BaselineDocumentAnalysis.java

@@ -0,0 +1,12 @@
+package p.studio.lsp.v1.compiler;
+
+import java.util.List;
+import java.util.Objects;
+
+public record BaselineDocumentAnalysis(
+        List<BaselineDocumentIssue> issues) {
+
+    public BaselineDocumentAnalysis {
+        issues = List.copyOf(Objects.requireNonNull(issues, "issues"));
+    }
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/compiler/BaselineDocumentIssue.java

@@ -0,0 +1,29 @@
+package p.studio.lsp.v1.compiler;
+
+import java.util.Objects;
+
+public record BaselineDocumentIssue(
+        int startLine,
+        int startCharacter,
+        int endLine,
+        int endCharacter,
+        BaselineIssueSeverity severity,
+        String source,
+        String message) {
+
+    public BaselineDocumentIssue {
+        severity = Objects.requireNonNull(severity, "severity");
+        source = requireText(source, "source");
+        message = requireText(message, "message");
+    }
+
+    private static String requireText(
+            final String value,
+            final String field) {
+        final String candidate = Objects.requireNonNull(value, field).trim();
+        if (candidate.isEmpty()) {
+            throw new IllegalArgumentException(field + " must not be blank");
+        }
+        return candidate;
+    }
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/compiler/BaselineHover.java

@@ -0,0 +1,15 @@
+package p.studio.lsp.v1.compiler;
+
+import java.util.Objects;
+
+public record BaselineHover(
+        String markdown) {
+
+    public BaselineHover {
+        final String candidate = Objects.requireNonNull(markdown, "markdown").trim();
+        if (candidate.isEmpty()) {
+            throw new IllegalArgumentException("markdown must not be blank");
+        }
+        markdown = candidate;
+    }
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/compiler/BaselineIssueSeverity.java

@@ -0,0 +1,7 @@
+package p.studio.lsp.v1.compiler;
+
+public enum BaselineIssueSeverity {
+    INFORMATION,
+    WARNING,
+    ERROR
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/compiler/BaselineServerDescription.java

@@ -0,0 +1,24 @@
+package p.studio.lsp.v1.compiler;
+
+import java.util.Objects;
+
+public record BaselineServerDescription(
+        String name,
+        String version,
+        boolean hoverSupported) {
+
+    public BaselineServerDescription {
+        name = requireText(name, "name");
+        version = requireText(version, "version");
+    }
+
+    private static String requireText(
+            final String value,
+            final String field) {
+        final String candidate = Objects.requireNonNull(value, field).trim();
+        if (candidate.isEmpty()) {
+            throw new IllegalArgumentException(field + " must not be blank");
+        }
+        return candidate;
+    }
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/compiler/CompilerLanguageServiceBridge.java

@@ -1,10 +1,11 @@
 package p.studio.lsp.v1.compiler;
 
 import p.studio.compiler.workspaces.BuilderPipelineService;
+import p.studio.lsp.api.LspProjectContext;
 
 import java.util.Objects;
 
-public final class CompilerLanguageServiceBridge {
+public final class CompilerLanguageServiceBridge implements LanguageServiceBridge {
     private final BuilderPipelineService builderPipelineService;
 
     public CompilerLanguageServiceBridge() {
@@ -18,4 +19,63 @@ public final class CompilerLanguageServiceBridge {
     public BuilderPipelineService builderPipelineService() {
         return builderPipelineService;
     }
+
+    @Override
+    public BaselineServerDescription describeServer(final LspProjectContext project) {
+        Objects.requireNonNull(project, "project");
+        return new BaselineServerDescription(
+                "Prometeu Studio LSP",
+                "0.1.0",
+                true);
+    }
+
+    @Override
+    public BaselineDocumentAnalysis analyzeDocument(
+            final LspProjectContext project,
+            final String documentUri,
+            final String text) {
+        Objects.requireNonNull(project, "project");
+        // Wave 1 keeps responses intentionally synthetic while hardening the bridge boundary.
+        final String message = "Compiler-backed baseline via " + builderPipelineService.getClass().getSimpleName();
+        return new BaselineDocumentAnalysis(java.util.List.of(new BaselineDocumentIssue(
+                0,
+                0,
+                0,
+                Math.max(1, firstLineLength(text)),
+                BaselineIssueSeverity.INFORMATION,
+                "Prometeu Studio",
+                message)));
+    }
+
+    @Override
+    public BaselineHover hover(
+            final LspProjectContext project,
+            final String documentUri,
+            final int line,
+            final int character) {
+        Objects.requireNonNull(project, "project");
+        return new BaselineHover("""
+                **Prometeu Studio LSP**
+
+                Compiler-backed baseline.
+
+                Semantic enrichment will be layered later.
+                """);
+    }
+
+    @Override
+    public String onSave(
+            final LspProjectContext project,
+            final String documentUri) {
+        Objects.requireNonNull(project, "project");
+        return "Prometeu Studio saw save: " + documentUri;
+    }
+
+    private int firstLineLength(final String text) {
+        if (text == null || text.isEmpty()) {
+            return 1;
+        }
+        final int newline = text.indexOf('\n');
+        return newline < 0 ? text.length() : newline;
+    }
 }

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/compiler/LanguageServiceBridge.java

@@ -0,0 +1,13 @@
+package p.studio.lsp.v1.compiler;
+
+import p.studio.lsp.api.LspProjectContext;
+
+public interface LanguageServiceBridge {
+    BaselineServerDescription describeServer(LspProjectContext project);
+
+    BaselineDocumentAnalysis analyzeDocument(LspProjectContext project, String documentUri, String text);
+
+    BaselineHover hover(LspProjectContext project, String documentUri, int line, int character);
+
+    String onSave(LspProjectContext project, String documentUri);
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/protocol/PrometeuLanguageServer.java

@@ -8,16 +8,17 @@ import org.eclipse.lsp4j.services.TextDocumentService;
 import org.eclipse.lsp4j.services.WorkspaceService;
 import p.studio.lsp.api.LspProjectContext;
 import p.studio.lsp.v1.compiler.CompilerLanguageServiceBridge;
-import p.studio.lsp.v1.protocol.mapping.ProtocolServerProfile;
+import p.studio.lsp.v1.compiler.LanguageServiceBridge;
-import p.studio.lsp.v1.protocol.mapping.ServerCapabilitiesMapper;
+import p.studio.lsp.v1.protocol.mapping.Lsp4jProtocolMessageMapper;
+import p.studio.lsp.v1.protocol.mapping.ProtocolMessageMapper;
 
 import java.util.Objects;
 import java.util.concurrent.CompletableFuture;
 
 public final class PrometeuLanguageServer implements LanguageServer, LanguageClientAware {
     private final LspProjectContext project;
-    private final CompilerLanguageServiceBridge compilerBridge;
+    private final LanguageServiceBridge languageServiceBridge;
-    private final ServerCapabilitiesMapper capabilitiesMapper;
+    private final ProtocolMessageMapper protocolMessageMapper;
     private final TextDocumentService textDocumentService;
     private final WorkspaceService workspaceService;
     private volatile LanguageClient client;
@@ -28,21 +29,23 @@ public final class PrometeuLanguageServer implements LanguageServer, LanguageCli
             final CompilerLanguageServiceBridge compilerBridge) {
         this(project,
                 compilerBridge,
-                new ServerCapabilitiesMapper(),
+                new Lsp4jProtocolMessageMapper(),
-                new PrometeuTextDocumentService(),
+                null,
                 new PrometeuWorkspaceService());
     }
 
     PrometeuLanguageServer(
             final LspProjectContext project,
-            final CompilerLanguageServiceBridge compilerBridge,
+            final LanguageServiceBridge languageServiceBridge,
-            final ServerCapabilitiesMapper capabilitiesMapper,
+            final ProtocolMessageMapper protocolMessageMapper,
             final TextDocumentService textDocumentService,
             final WorkspaceService workspaceService) {
         this.project = Objects.requireNonNull(project, "project");
-        this.compilerBridge = Objects.requireNonNull(compilerBridge, "compilerBridge");
+        this.languageServiceBridge = Objects.requireNonNull(languageServiceBridge, "languageServiceBridge");
-        this.capabilitiesMapper = Objects.requireNonNull(capabilitiesMapper, "capabilitiesMapper");
+        this.protocolMessageMapper = Objects.requireNonNull(protocolMessageMapper, "protocolMessageMapper");
-        this.textDocumentService = Objects.requireNonNull(textDocumentService, "textDocumentService");
+        this.textDocumentService = textDocumentService != null
+                ? textDocumentService
+                : new PrometeuTextDocumentService(project, languageServiceBridge, protocolMessageMapper);
         this.workspaceService = Objects.requireNonNull(workspaceService, "workspaceService");
     }
 
@@ -56,8 +59,8 @@ public final class PrometeuLanguageServer implements LanguageServer, LanguageCli
 
     @Override
     public CompletableFuture<InitializeResult> initialize(final InitializeParams params) {
-        final ProtocolServerProfile profile = ProtocolServerProfile.defaults();
+        return CompletableFuture.completedFuture(protocolMessageMapper.mapInitializeResult(
-        return CompletableFuture.completedFuture(capabilitiesMapper.map(profile));
+                languageServiceBridge.describeServer(project)));
     }
 
     @Override
@@ -66,8 +69,7 @@ public final class PrometeuLanguageServer implements LanguageServer, LanguageCli
         if (currentClient == null) {
             return;
         }
-        currentClient.logMessage(new MessageParams(
+        currentClient.logMessage(protocolMessageMapper.mapInfoMessage(
-                MessageType.Info,
                 "Prometeu Studio LSP connected for project " + project.projectKey()));
     }
 
@@ -82,8 +84,7 @@ public final class PrometeuLanguageServer implements LanguageServer, LanguageCli
         if (!shutdownRequested) {
             final LanguageClient currentClient = client;
             if (currentClient != null) {
-                currentClient.logMessage(new MessageParams(
+                currentClient.logMessage(new MessageParams(MessageType.Warning,
-                        MessageType.Warning,
                         "Prometeu Studio LSP received exit before shutdown"));
             }
         }

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/protocol/PrometeuTextDocumentService.java

@@ -3,20 +3,35 @@ package p.studio.lsp.v1.protocol;
 import org.eclipse.lsp4j.*;
 import org.eclipse.lsp4j.services.LanguageClient;
 import org.eclipse.lsp4j.services.TextDocumentService;
+import p.studio.lsp.api.LspProjectContext;
+import p.studio.lsp.v1.compiler.LanguageServiceBridge;
+import p.studio.lsp.v1.protocol.mapping.ProtocolMessageMapper;
 
-import java.util.List;
+import java.util.Objects;
 import java.util.concurrent.CompletableFuture;
 
 public final class PrometeuTextDocumentService implements TextDocumentService {
+    private final LspProjectContext project;
+    private final LanguageServiceBridge languageServiceBridge;
+    private final ProtocolMessageMapper protocolMessageMapper;
     private volatile LanguageClient client;
 
+    public PrometeuTextDocumentService(
+            final LspProjectContext project,
+            final LanguageServiceBridge languageServiceBridge,
+            final ProtocolMessageMapper protocolMessageMapper) {
+        this.project = Objects.requireNonNull(project, "project");
+        this.languageServiceBridge = Objects.requireNonNull(languageServiceBridge, "languageServiceBridge");
+        this.protocolMessageMapper = Objects.requireNonNull(protocolMessageMapper, "protocolMessageMapper");
+    }
+
     void connect(final LanguageClient client) {
         this.client = client;
     }
 
     @Override
     public void didOpen(final DidOpenTextDocumentParams params) {
-        publishHelloDiagnostic(params.getTextDocument().getUri(), params.getTextDocument().getText());
+        publishAnalysis(params.getTextDocument().getUri(), params.getTextDocument().getText());
     }
 
     @Override
@@ -24,7 +39,7 @@ public final class PrometeuTextDocumentService implements TextDocumentService {
         final String text = params.getContentChanges().isEmpty()
                 ? ""
                 : params.getContentChanges().getFirst().getText();
-        publishHelloDiagnostic(params.getTextDocument().getUri(), text);
+        publishAnalysis(params.getTextDocument().getUri(), text);
     }
 
     @Override
@@ -33,7 +48,7 @@ public final class PrometeuTextDocumentService implements TextDocumentService {
         if (currentClient == null) {
             return;
         }
-        currentClient.publishDiagnostics(new PublishDiagnosticsParams(params.getTextDocument().getUri(), List.of()));
+        currentClient.publishDiagnostics(protocolMessageMapper.emptyDiagnostics(params.getTextDocument().getUri()));
     }
 
     @Override
@@ -42,52 +57,28 @@ public final class PrometeuTextDocumentService implements TextDocumentService {
         if (currentClient == null) {
             return;
         }
-        currentClient.logMessage(new MessageParams(
+        currentClient.logMessage(protocolMessageMapper.mapInfoMessage(
-                MessageType.Info,
+                languageServiceBridge.onSave(project, params.getTextDocument().getUri())));
-                "Prometeu Studio saw save: " + params.getTextDocument().getUri()));
     }
 
     @Override
     public CompletableFuture<Hover> hover(final HoverParams params) {
-        final MarkupContent content = new MarkupContent();
+        return CompletableFuture.completedFuture(protocolMessageMapper.mapHover(languageServiceBridge.hover(
-        content.setKind(MarkupKind.MARKDOWN);
+                project,
-        content.setValue("""
+                params.getTextDocument().getUri(),
-                **Prometeu Studio LSP**
+                params.getPosition().getLine(),
-
+                params.getPosition().getCharacter())));
-                Structured baseline server.
-
-                Semantic enrichment will be layered later.
-                """);
-
-        final Hover hover = new Hover();
-        hover.setContents(content);
-        return CompletableFuture.completedFuture(hover);
     }
 
-    private void publishHelloDiagnostic(
+    private void publishAnalysis(
             final String uri,
             final String text) {
         final LanguageClient currentClient = client;
         if (currentClient == null) {
             return;
         }
-
+        currentClient.publishDiagnostics(protocolMessageMapper.mapDiagnostics(
-        final Diagnostic diagnostic = new Diagnostic();
+                uri,
-        diagnostic.setRange(new Range(
+                languageServiceBridge.analyzeDocument(project, uri, text)));
-                new Position(0, 0),
-                new Position(0, Math.max(1, firstLineLength(text)))));
-        diagnostic.setSeverity(DiagnosticSeverity.Information);
-        diagnostic.setSource("Prometeu Studio");
-        diagnostic.setMessage("Structured baseline LSP response");
-
-        currentClient.publishDiagnostics(new PublishDiagnosticsParams(uri, List.of(diagnostic)));
-    }
-
-    private int firstLineLength(final String text) {
-        if (text == null || text.isEmpty()) {
-            return 1;
-        }
-        final int newline = text.indexOf('\n');
-        return newline < 0 ? text.length() : newline;
     }
 }

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/protocol/mapping/Lsp4jProtocolMessageMapper.java

@@ -0,0 +1,78 @@
+package p.studio.lsp.v1.protocol.mapping;
+
+import org.eclipse.lsp4j.*;
+import p.studio.lsp.v1.compiler.*;
+
+import java.util.List;
+
+public final class Lsp4jProtocolMessageMapper implements ProtocolMessageMapper {
+    @Override
+    public InitializeResult mapInitializeResult(final BaselineServerDescription description) {
+        final ServerCapabilities capabilities = new ServerCapabilities();
+
+        final TextDocumentSyncOptions syncOptions = new TextDocumentSyncOptions();
+        syncOptions.setOpenClose(true);
+        syncOptions.setChange(TextDocumentSyncKind.Full);
+
+        final SaveOptions saveOptions = new SaveOptions();
+        saveOptions.setIncludeText(true);
+        syncOptions.setSave(saveOptions);
+
+        capabilities.setTextDocumentSync(syncOptions);
+        capabilities.setHoverProvider(description.hoverSupported());
+
+        final InitializeResult result = new InitializeResult(capabilities);
+        final ServerInfo serverInfo = new ServerInfo();
+        serverInfo.setName(description.name());
+        serverInfo.setVersion(description.version());
+        result.setServerInfo(serverInfo);
+        return result;
+    }
+
+    @Override
+    public PublishDiagnosticsParams mapDiagnostics(
+            final String uri,
+            final BaselineDocumentAnalysis analysis) {
+        return new PublishDiagnosticsParams(uri, analysis.issues().stream().map(this::mapDiagnostic).toList());
+    }
+
+    @Override
+    public PublishDiagnosticsParams emptyDiagnostics(final String uri) {
+        return new PublishDiagnosticsParams(uri, List.of());
+    }
+
+    @Override
+    public Hover mapHover(final BaselineHover hover) {
+        final MarkupContent content = new MarkupContent();
+        content.setKind(MarkupKind.MARKDOWN);
+        content.setValue(hover.markdown());
+
+        final Hover result = new Hover();
+        result.setContents(content);
+        return result;
+    }
+
+    @Override
+    public MessageParams mapInfoMessage(final String message) {
+        return new MessageParams(MessageType.Info, message);
+    }
+
+    private Diagnostic mapDiagnostic(final BaselineDocumentIssue issue) {
+        final Diagnostic diagnostic = new Diagnostic();
+        diagnostic.setRange(new Range(
+                new Position(issue.startLine(), issue.startCharacter()),
+                new Position(issue.endLine(), issue.endCharacter())));
+        diagnostic.setSeverity(mapSeverity(issue.severity()));
+        diagnostic.setSource(issue.source());
+        diagnostic.setMessage(issue.message());
+        return diagnostic;
+    }
+
+    private DiagnosticSeverity mapSeverity(final BaselineIssueSeverity severity) {
+        return switch (severity) {
+            case INFORMATION -> DiagnosticSeverity.Information;
+            case WARNING -> DiagnosticSeverity.Warning;
+            case ERROR -> DiagnosticSeverity.Error;
+        };
+    }
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/protocol/mapping/ProtocolMessageMapper.java

@@ -0,0 +1,21 @@
+package p.studio.lsp.v1.protocol.mapping;
+
+import org.eclipse.lsp4j.Hover;
+import org.eclipse.lsp4j.InitializeResult;
+import org.eclipse.lsp4j.MessageParams;
+import org.eclipse.lsp4j.PublishDiagnosticsParams;
+import p.studio.lsp.v1.compiler.BaselineDocumentAnalysis;
+import p.studio.lsp.v1.compiler.BaselineHover;
+import p.studio.lsp.v1.compiler.BaselineServerDescription;
+
+public interface ProtocolMessageMapper {
+    InitializeResult mapInitializeResult(BaselineServerDescription description);
+
+    PublishDiagnosticsParams mapDiagnostics(String uri, BaselineDocumentAnalysis analysis);
+
+    PublishDiagnosticsParams emptyDiagnostics(String uri);
+
+    Hover mapHover(BaselineHover hover);
+
+    MessageParams mapInfoMessage(String message);
+}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/protocol/mapping/ProtocolServerProfile.java

@@ -1,11 +0,0 @@
-package p.studio.lsp.v1.protocol.mapping;
-
-public record ProtocolServerProfile(
-        String name,
-        String version,
-        boolean hoverSupported) {
-
-    public static ProtocolServerProfile defaults() {
-        return new ProtocolServerProfile("Prometeu Studio LSP", "0.1.0", true);
-    }
-}

prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/v1/protocol/mapping/ServerCapabilitiesMapper.java

@@ -1,27 +0,0 @@
-package p.studio.lsp.v1.protocol.mapping;
-
-import org.eclipse.lsp4j.*;
-
-public final class ServerCapabilitiesMapper {
-    public InitializeResult map(final ProtocolServerProfile profile) {
-        final ServerCapabilities capabilities = new ServerCapabilities();
-
-        final TextDocumentSyncOptions syncOptions = new TextDocumentSyncOptions();
-        syncOptions.setOpenClose(true);
-        syncOptions.setChange(TextDocumentSyncKind.Full);
-
-        final SaveOptions saveOptions = new SaveOptions();
-        saveOptions.setIncludeText(true);
-        syncOptions.setSave(saveOptions);
-
-        capabilities.setTextDocumentSync(syncOptions);
-        capabilities.setHoverProvider(profile.hoverSupported());
-
-        final InitializeResult result = new InitializeResult(capabilities);
-        final ServerInfo serverInfo = new ServerInfo();
-        serverInfo.setName(profile.name());
-        serverInfo.setVersion(profile.version());
-        result.setServerInfo(serverInfo);
-        return result;
-    }
-}

prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/v1/compiler/CompilerLanguageServiceBridgeTest.java

@@ -0,0 +1,29 @@
+package p.studio.lsp.v1.compiler;
+
+import org.junit.jupiter.api.Test;
+import p.studio.lsp.api.LspProjectContext;
+
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class CompilerLanguageServiceBridgeTest {
+
+    @Test
+    void bridgeProvidesStableBaselineResponses() {
+        final CompilerLanguageServiceBridge bridge = new CompilerLanguageServiceBridge();
+        final LspProjectContext project = new LspProjectContext("demo", "pbs", Path.of("."));
+
+        final BaselineServerDescription server = bridge.describeServer(project);
+        final BaselineDocumentAnalysis analysis = bridge.analyzeDocument(project, "file:///demo.pbs", "let x = 1");
+        final BaselineHover hover = bridge.hover(project, "file:///demo.pbs", 0, 0);
+
+        assertEquals("Prometeu Studio LSP", server.name());
+        assertTrue(server.hoverSupported());
+        assertFalse(analysis.issues().isEmpty());
+        assertTrue(analysis.issues().getFirst().message().contains("BuilderPipelineService"));
+        assertTrue(hover.markdown().contains("Compiler-backed baseline"));
+    }
+}

prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/v1/protocol/PrometeuLanguageServerTest.java

@@ -0,0 +1,116 @@
+package p.studio.lsp.v1.protocol;
+
+import org.eclipse.lsp4j.InitializeParams;
+import org.eclipse.lsp4j.InitializeResult;
+import org.eclipse.lsp4j.PublishDiagnosticsParams;
+import org.eclipse.lsp4j.services.TextDocumentService;
+import org.eclipse.lsp4j.services.WorkspaceService;
+import org.junit.jupiter.api.Test;
+import p.studio.lsp.api.LspProjectContext;
+import p.studio.lsp.v1.compiler.*;
+import p.studio.lsp.v1.protocol.mapping.ProtocolMessageMapper;
+
+import java.nio.file.Path;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertSame;
+
+class PrometeuLanguageServerTest {
+
+    @Test
+    void initializeDelegatesThroughBridgeAndMapper() {
+        final RecordingBridge bridge = new RecordingBridge();
+        final RecordingMapper mapper = new RecordingMapper();
+        final InitializeResult expected = new InitializeResult();
+        mapper.initializeResult = expected;
+
+        final PrometeuLanguageServer server = new PrometeuLanguageServer(
+                new LspProjectContext("demo", "pbs", Path.of(".")),
+                bridge,
+                mapper,
+                new NoopTextDocumentService(),
+                new PrometeuWorkspaceService());
+
+        final InitializeResult result = server.initialize(new InitializeParams()).join();
+
+        assertSame(expected, result);
+        assertEquals(1, bridge.describeServerCalls);
+        assertSame(bridge.serverDescription, mapper.lastServerDescription);
+    }
+
+    private static final class RecordingBridge implements LanguageServiceBridge {
+        private int describeServerCalls;
+        private final BaselineServerDescription serverDescription = new BaselineServerDescription("demo", "1", true);
+
+        @Override
+        public BaselineServerDescription describeServer(final LspProjectContext project) {
+            describeServerCalls++;
+            return serverDescription;
+        }
+
+        @Override
+        public BaselineDocumentAnalysis analyzeDocument(final LspProjectContext project, final String documentUri, final String text) {
+            return new BaselineDocumentAnalysis(List.of());
+        }
+
+        @Override
+        public BaselineHover hover(final LspProjectContext project, final String documentUri, final int line, final int character) {
+            return new BaselineHover("hover");
+        }
+
+        @Override
+        public String onSave(final LspProjectContext project, final String documentUri) {
+            return "saved";
+        }
+    }
+
+    private static final class RecordingMapper implements ProtocolMessageMapper {
+        private InitializeResult initializeResult;
+        private BaselineServerDescription lastServerDescription;
+
+        @Override
+        public InitializeResult mapInitializeResult(final BaselineServerDescription description) {
+            lastServerDescription = description;
+            return initializeResult;
+        }
+
+        @Override
+        public PublishDiagnosticsParams mapDiagnostics(final String uri, final BaselineDocumentAnalysis analysis) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public PublishDiagnosticsParams emptyDiagnostics(final String uri) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public org.eclipse.lsp4j.Hover mapHover(final BaselineHover hover) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public org.eclipse.lsp4j.MessageParams mapInfoMessage(final String message) {
+            return new org.eclipse.lsp4j.MessageParams();
+        }
+    }
+
+    private static final class NoopTextDocumentService implements TextDocumentService {
+        @Override
+        public void didOpen(final org.eclipse.lsp4j.DidOpenTextDocumentParams params) {
+        }
+
+        @Override
+        public void didChange(final org.eclipse.lsp4j.DidChangeTextDocumentParams params) {
+        }
+
+        @Override
+        public void didClose(final org.eclipse.lsp4j.DidCloseTextDocumentParams params) {
+        }
+
+        @Override
+        public void didSave(final org.eclipse.lsp4j.DidSaveTextDocumentParams params) {
+        }
+    }
+}

prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/v1/protocol/PrometeuTextDocumentServiceTest.java

@@ -0,0 +1,136 @@
+package p.studio.lsp.v1.protocol;
+
+import org.eclipse.lsp4j.*;
+import org.eclipse.lsp4j.services.LanguageClient;
+import org.junit.jupiter.api.Test;
+import p.studio.lsp.api.LspProjectContext;
+import p.studio.lsp.v1.compiler.*;
+import p.studio.lsp.v1.protocol.mapping.ProtocolMessageMapper;
+
+import java.nio.file.Path;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertSame;
+
+class PrometeuTextDocumentServiceTest {
+
+    @Test
+    void documentEventsDelegateToBridgeAndMapper() {
+        final RecordingBridge bridge = new RecordingBridge();
+        final RecordingMapper mapper = new RecordingMapper();
+        final RecordingClient client = new RecordingClient();
+        final PrometeuTextDocumentService service = new PrometeuTextDocumentService(
+                new LspProjectContext("demo", "pbs", Path.of(".")),
+                bridge,
+                mapper);
+        service.connect(client);
+
+        service.didOpen(new DidOpenTextDocumentParams(new TextDocumentItem("file:///demo.pbs", "pbs", 1, "abc")));
+        service.didSave(new DidSaveTextDocumentParams(new TextDocumentIdentifier("file:///demo.pbs"), "abc"));
+        service.hover(new HoverParams(new TextDocumentIdentifier("file:///demo.pbs"), new Position(0, 0))).join();
+
+        assertEquals(1, bridge.analyzeCalls);
+        assertEquals(1, bridge.saveCalls);
+        assertEquals(1, bridge.hoverCalls);
+        assertSame(bridge.lastAnalysis, mapper.lastAnalysis);
+        assertSame(bridge.lastHover, mapper.lastHover);
+        assertSame(mapper.diagnostics, client.lastDiagnostics);
+        assertSame(mapper.infoMessage, client.lastLogMessage);
+    }
+
+    private static final class RecordingBridge implements LanguageServiceBridge {
+        private int analyzeCalls;
+        private int saveCalls;
+        private int hoverCalls;
+        private final BaselineDocumentAnalysis lastAnalysis = new BaselineDocumentAnalysis(List.of(
+                new BaselineDocumentIssue(0, 0, 0, 1, BaselineIssueSeverity.INFORMATION, "src", "msg")));
+        private final BaselineHover lastHover = new BaselineHover("hover");
+
+        @Override
+        public BaselineServerDescription describeServer(final LspProjectContext project) {
+            return new BaselineServerDescription("demo", "1", true);
+        }
+
+        @Override
+        public BaselineDocumentAnalysis analyzeDocument(final LspProjectContext project, final String documentUri, final String text) {
+            analyzeCalls++;
+            return lastAnalysis;
+        }
+
+        @Override
+        public BaselineHover hover(final LspProjectContext project, final String documentUri, final int line, final int character) {
+            hoverCalls++;
+            return lastHover;
+        }
+
+        @Override
+        public String onSave(final LspProjectContext project, final String documentUri) {
+            saveCalls++;
+            return "saved";
+        }
+    }
+
+    private static final class RecordingMapper implements ProtocolMessageMapper {
+        private final PublishDiagnosticsParams diagnostics = new PublishDiagnosticsParams("file:///demo.pbs", List.of());
+        private final MessageParams infoMessage = new MessageParams(MessageType.Info, "saved");
+        private BaselineDocumentAnalysis lastAnalysis;
+        private BaselineHover lastHover;
+
+        @Override
+        public InitializeResult mapInitializeResult(final BaselineServerDescription description) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public PublishDiagnosticsParams mapDiagnostics(final String uri, final BaselineDocumentAnalysis analysis) {
+            lastAnalysis = analysis;
+            return diagnostics;
+        }
+
+        @Override
+        public PublishDiagnosticsParams emptyDiagnostics(final String uri) {
+            return new PublishDiagnosticsParams(uri, List.of());
+        }
+
+        @Override
+        public Hover mapHover(final BaselineHover hover) {
+            lastHover = hover;
+            return new Hover();
+        }
+
+        @Override
+        public MessageParams mapInfoMessage(final String message) {
+            return infoMessage;
+        }
+    }
+
+    private static final class RecordingClient implements LanguageClient {
+        private PublishDiagnosticsParams lastDiagnostics;
+        private MessageParams lastLogMessage;
+
+        @Override
+        public void telemetryEvent(final Object object) {
+        }
+
+        @Override
+        public void publishDiagnostics(final PublishDiagnosticsParams diagnostics) {
+            lastDiagnostics = diagnostics;
+        }
+
+        @Override
+        public void showMessage(final MessageParams messageParams) {
+        }
+
+        @Override
+        public CompletableFuture<MessageActionItem> showMessageRequest(final ShowMessageRequestParams requestParams) {
+            return CompletableFuture.completedFuture(null);
+        }
+
+        @Override
+        public void logMessage(final MessageParams message) {
+            lastLogMessage = message;
+        }
+    }
+}