Per-session workspace, tools only when workspace set

- Session has workspace field (absolute path, optional)
- ToolService stateless, receives workspace per call
- No workspace = no tools sent to API
- Removed hardcoded workspace from Program.cs
- Workspace field in session edit form

Endpoints/ChatEndpoint.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Net.Http;
 using System.Text.Json;
@@ -121,7 +122,11 @@ public static class ChatEndpoint
             new { type = "text", text = systemPromptText }
         };
 
+        var workspace = session.Workspace;
+        if (!string.IsNullOrEmpty(workspace))
+            Directory.CreateDirectory(workspace);
+
         var anthropic = new AnthropicService(httpFactory, token, toolService, db);
-        await anthropic.StreamChat(res, modelId, systemPrompt, messages, chainId);
+        await anthropic.StreamChat(res, modelId, systemPrompt, messages, chainId, workspace);
     }
 }

Endpoints/SessionEndpoint.cs

@@ -50,8 +50,9 @@ public static class SessionEndpoint
         var description = body.TryGetProperty("description", out var d) ? d.GetString() : null;
         var image = body.TryGetProperty("image", out var img) ? img.GetString() : null;
         var agentId = body.TryGetProperty("agentId", out var a) ? a.GetString() : null;
+        var workspace = body.TryGetProperty("workspace", out var w) ? w.GetString() : null;
 
-        var session = await db.CreateSession(name, description, image, agentId);
+        var session = await db.CreateSession(name, description, image, agentId, workspace);
         await ctx.Response.WriteAsJsonAsync(session);
     }
 

Models/SessionRecord.cs

@@ -8,6 +8,7 @@ public class SessionRecord
     public string Description { get; set; }
     public string Image { get; set; }
     public string AgentId { get; set; }
+    public string Workspace { get; set; }
     public bool IsDeleted { get; set; }
     public string CreatedAt { get; set; }
     public string UpdatedAt { get; set; }

Program.cs

@@ -9,10 +9,8 @@ var builder = WebApplication.CreateBuilder(args);
 builder.Services.AddHttpClient();
 
 var dataDir = Path.Combine(AppContext.BaseDirectory, "data");
-var workspaceRoot = Path.Combine(dataDir, "workspace");
-Directory.CreateDirectory(workspaceRoot);
 
-builder.Services.AddSingleton(new ToolService(workspaceRoot));
+builder.Services.AddSingleton(new ToolService());
 builder.Services.AddSingleton(new DatabaseService(Path.Combine(dataDir, "gott.db")));
 
 var app = builder.Build();

Services/AnthropicService.cs

@@ -32,6 +32,7 @@ public class AnthropicService
         List<object> systemPrompt,
         List<object> messages,
         string chainId,
+        string workspace,
         string sessionId = null,
         int maxIterations = 25)
     {
@@ -57,10 +58,12 @@ public class AnthropicService
                 ["max_tokens"] = 4096,
                 ["system"] = systemPrompt,
                 ["messages"] = messages,
-                ["tools"] = _toolService.GetToolDefinitions(),
                 ["stream"] = true
             };
 
+            if (!string.IsNullOrEmpty(workspace))
+                payload["tools"] = _toolService.GetToolDefinitions();
+
             var client = CreateClient();
             var json = JsonSerializer.Serialize(payload);
             var httpContent = new StringContent(json, Encoding.UTF8, "application/json");
@@ -86,7 +89,7 @@ public class AnthropicService
                 return;
             }
 
-            var (stopReason, assistantContent, executedTools) = await ProcessStream(response, httpResp, usage);
+            var (stopReason, assistantContent, executedTools) = await ProcessStream(response, httpResp, usage, workspace);
             lastStopReason = stopReason;
 
             messages.Add(new { role = "assistant", content = assistantContent });
@@ -181,7 +184,8 @@ public class AnthropicService
     private async Task<(string StopReason, List<object> Content, List<ToolResult> Tools)> ProcessStream(
         HttpResponse response,
         HttpResponseMessage httpResp,
-        TokenUsage usage)
+        TokenUsage usage,
+        string workspace)
     {
         var stream = await httpResp.Content.ReadAsStreamAsync();
         using var reader = new StreamReader(stream);
@@ -297,7 +301,7 @@ public class AnthropicService
 
                             string toolResult;
                             bool isError = false;
-                            try { toolResult = await _toolService.ExecuteTool(currentToolName, inputEl); }
+                            try { toolResult = await _toolService.ExecuteTool(currentToolName, inputEl, workspace); }
                             catch (Exception ex) { toolResult = $"Fehler: {ex.Message}"; isError = true; }
 
                             executedTools.Add(new ToolResult(currentToolId, toolResult, isError));

Services/DatabaseService.cs

@@ -101,6 +101,7 @@ public class DatabaseService
         TryAddColumn(conn, "sessions", "agent_id", "TEXT");
         TryAddColumn(conn, "sessions", "description", "TEXT");
         TryAddColumn(conn, "sessions", "image", "TEXT");
+        TryAddColumn(conn, "sessions", "workspace", "TEXT");
         TryAddColumn(conn, "sessions", "is_deleted", "INTEGER NOT NULL DEFAULT 0");
         TryAddColumn(conn, "chains", "agent_id", "TEXT");
     }
@@ -162,7 +163,7 @@ public class DatabaseService
 
     // ── Sessions ──
 
-    public async Task<SessionRecord> CreateSession(string name = null, string description = null, string image = null, string agentId = null)
+    public async Task<SessionRecord> CreateSession(string name = null, string description = null, string image = null, string agentId = null, string workspace = null)
     {
         using var conn = CreateConnection();
         var now = DateTime.UtcNow.ToString("o");
@@ -173,12 +174,13 @@ public class DatabaseService
             Description = description,
             Image = image,
             AgentId = agentId,
+            Workspace = workspace,
             CreatedAt = now,
             UpdatedAt = now
         };
         await conn.ExecuteAsync(@"
-            INSERT INTO sessions (session_id, name, description, image, agent_id, created_at, updated_at)
+            INSERT INTO sessions (session_id, name, description, image, agent_id, workspace, created_at, updated_at)
-            VALUES (@SessionId, @Name, @Description, @Image, @AgentId, @CreatedAt, @UpdatedAt)
+            VALUES (@SessionId, @Name, @Description, @Image, @AgentId, @Workspace, @CreatedAt, @UpdatedAt)
         ", session);
         return session;
     }
@@ -217,6 +219,7 @@ public class DatabaseService
         if (body.TryGetProperty("description", out var d)) { sets.Add("description = @desc"); p.Add("desc", d.GetString()); }
         if (body.TryGetProperty("image", out var img)) { sets.Add("image = @image"); p.Add("image", img.GetString()); }
         if (body.TryGetProperty("agentId", out var a)) { sets.Add("agent_id = @agentId2"); p.Add("agentId2", a.GetString()); }
+        if (body.TryGetProperty("workspace", out var w)) { sets.Add("workspace = @workspace"); p.Add("workspace", w.GetString()); }
 
         await conn.ExecuteAsync($"UPDATE sessions SET {string.Join(", ", sets)} WHERE session_id = @sessionId", p);
     }

Services/ToolService.cs

@@ -11,13 +11,6 @@ namespace Gott.Services;
 
 public class ToolService
 {
-    private readonly string _workspaceRoot;
-
-    public ToolService(string workspaceRoot)
-    {
-        _workspaceRoot = workspaceRoot;
-    }
-
     public object[] GetToolDefinitions()
     {
         return new object[]
@@ -112,31 +105,31 @@ public class ToolService
         };
     }
 
-    public async Task<string> ExecuteTool(string name, JsonElement input)
+    public async Task<string> ExecuteTool(string name, JsonElement input, string workspace)
     {
         switch (name)
         {
             case "read_file":
             {
-                var path = ResolvePath(input.GetProperty("path").GetString() ?? "");
+                var path = ResolvePath(input.GetProperty("path").GetString() ?? "", workspace);
                 if (!File.Exists(path))
-                    return $"Fehler: Datei nicht gefunden: {Path.GetRelativePath(_workspaceRoot, path)}";
+                    return $"Fehler: Datei nicht gefunden: {Path.GetRelativePath(workspace, path)}";
                 return File.ReadAllText(path);
             }
             case "write_file":
             {
-                var path = ResolvePath(input.GetProperty("path").GetString() ?? "");
+                var path = ResolvePath(input.GetProperty("path").GetString() ?? "", workspace);
                 var dir = Path.GetDirectoryName(path);
                 if (dir != null) Directory.CreateDirectory(dir);
                 var content = input.GetProperty("content").GetString() ?? "";
                 File.WriteAllText(path, content);
-                return $"Datei geschrieben: {Path.GetRelativePath(_workspaceRoot, path)} ({content.Length} Zeichen)";
+                return $"Datei geschrieben: {Path.GetRelativePath(workspace, path)} ({content.Length} Zeichen)";
             }
             case "edit_file":
             {
-                var path = ResolvePath(input.GetProperty("path").GetString() ?? "");
+                var path = ResolvePath(input.GetProperty("path").GetString() ?? "", workspace);
                 if (!File.Exists(path))
-                    return $"Fehler: Datei nicht gefunden: {Path.GetRelativePath(_workspaceRoot, path)}";
+                    return $"Fehler: Datei nicht gefunden: {Path.GetRelativePath(workspace, path)}";
                 var fileContent = File.ReadAllText(path);
                 var oldText = input.GetProperty("old_text").GetString() ?? "";
                 var newText = input.GetProperty("new_text").GetString() ?? "";
@@ -144,34 +137,34 @@ public class ToolService
                     return "Fehler: old_text nicht in der Datei gefunden. Exakter Match nötig.";
                 fileContent = fileContent.Replace(oldText, newText);
                 File.WriteAllText(path, fileContent);
-                return $"Datei bearbeitet: {Path.GetRelativePath(_workspaceRoot, path)}";
+                return $"Datei bearbeitet: {Path.GetRelativePath(workspace, path)}";
             }
             case "list_files":
             {
-                var path = ResolvePath(input.TryGetProperty("path", out var p) ? p.GetString() ?? "" : "");
+                var path = ResolvePath(input.TryGetProperty("path", out var p) ? p.GetString() ?? "" : "", workspace);
                 if (!Directory.Exists(path))
-                    return $"Fehler: Verzeichnis nicht gefunden: {Path.GetRelativePath(_workspaceRoot, path)}";
+                    return $"Fehler: Verzeichnis nicht gefunden: {Path.GetRelativePath(workspace, path)}";
                 var entries = new List<string>();
                 foreach (var dir in Directory.GetDirectories(path))
-                    entries.Add(Path.GetRelativePath(_workspaceRoot, dir) + "/");
+                    entries.Add(Path.GetRelativePath(workspace, dir) + "/");
                 foreach (var file in Directory.GetFiles(path))
-                    entries.Add(Path.GetRelativePath(_workspaceRoot, file));
+                    entries.Add(Path.GetRelativePath(workspace, file));
                 return entries.Count == 0 ? "(leer)" : string.Join("\n", entries);
             }
             case "delete_file":
             {
-                var path = ResolvePath(input.GetProperty("path").GetString() ?? "");
+                var path = ResolvePath(input.GetProperty("path").GetString() ?? "", workspace);
                 if (File.Exists(path))
                 {
                     File.Delete(path);
-                    return $"Datei gelöscht: {Path.GetRelativePath(_workspaceRoot, path)}";
+                    return $"Datei gelöscht: {Path.GetRelativePath(workspace, path)}";
                 }
                 if (Directory.Exists(path))
                 {
                     Directory.Delete(path, recursive: false);
-                    return $"Verzeichnis gelöscht: {Path.GetRelativePath(_workspaceRoot, path)}";
+                    return $"Verzeichnis gelöscht: {Path.GetRelativePath(workspace, path)}";
                 }
-                return $"Fehler: Nicht gefunden: {Path.GetRelativePath(_workspaceRoot, path)}";
+                return $"Fehler: Nicht gefunden: {Path.GetRelativePath(workspace, path)}";
             }
             case "execute":
             {
@@ -179,7 +172,7 @@ public class ToolService
                 var psi = new ProcessStartInfo
                 {
                     FileName = "/bin/bash",
-                    WorkingDirectory = _workspaceRoot,
+                    WorkingDirectory = workspace,
                     RedirectStandardInput = true,
                     RedirectStandardOutput = true,
                     RedirectStandardError = true,
@@ -218,10 +211,10 @@ public class ToolService
         }
     }
 
-    private string ResolvePath(string relativePath)
+    private string ResolvePath(string relativePath, string workspace)
     {
-        var full = Path.GetFullPath(Path.Combine(_workspaceRoot, relativePath ?? ""));
+        var full = Path.GetFullPath(Path.Combine(workspace, relativePath ?? ""));
-        if (!full.StartsWith(_workspaceRoot))
+        if (!full.StartsWith(workspace))
             throw new Exception("Zugriff außerhalb des Workspace nicht erlaubt");
         return full;
     }

wwwroot/index.html

@@ -66,6 +66,8 @@
       <textarea id="sessionDescription" rows="3" placeholder="Beschreibung (optional)"></textarea>
       <label>Agent</label>
       <select id="agentSelect"></select>
+      <label>Workspace</label>
+      <input type="text" id="sessionWorkspace" placeholder="Absoluter Pfad zum Arbeitsverzeichnis (optional)">
       <div class="agent-form-actions">
         <button id="sessionSaveBtn">Speichern</button>
         <button id="sessionCancelBtn">Abbrechen</button>

wwwroot/js/pages/session-page.js

@@ -16,6 +16,7 @@ registerPage('session', {
     const titleEl = document.getElementById('sessionPageTitle');
     const nameEl = document.getElementById('sessionName');
     const descEl = document.getElementById('sessionDescription');
+    const workspaceEl = document.getElementById('sessionWorkspace');
     const agentSelect = document.getElementById('agentSelect');
     const imagePreview = document.getElementById('sessionImagePreview');
     const imageInput = document.getElementById('sessionImageInput');
@@ -32,6 +33,7 @@ registerPage('session', {
       titleEl.textContent = session.name || 'Unbenannt';
       nameEl.value = session.name || '';
       descEl.value = session.description || '';
+      workspaceEl.value = session.workspace || '';
       _sessionImageData = session.image || null;
       deleteBtn.hidden = false;
       openChatBtn.hidden = false;
@@ -81,7 +83,8 @@ registerPage('session', {
         name: nameEl.value.trim() || 'Unbenannt',
         description: descEl.value.trim(),
         image: _sessionImageData,
-        agentId: agentSelect.value || null
+        agentId: agentSelect.value || null,
+        workspace: workspaceEl.value.trim() || null
       };
 
       if (isNew) {