Add task sidebar workflow

internal/mcp/protocol.go

@@ -29,7 +29,7 @@ var serverInfo = map[string]any{
 	"version": "0.1.0",
 }
 
-// serverInstructions is returned in the MCP `initialize` response. MCP
+// baseServerInstructions is returned in the MCP `initialize` response. MCP
 // clients show this to the underlying LLM as context for how to use
 // the server. Failure modes we've seen and want to head off:
 //   - The agent assumes patterm is something it has to launch (running
@@ -45,7 +45,14 @@ var serverInfo = map[string]any{
 //     up as sub-agents and won't be tied into the patterm lifecycle.
 //
 // Keep this short — clients vary in how much they surface to the LLM.
-const serverInstructions = "You are inside patterm. Use these MCP tools; do not launch patterm or poke its Unix socket yourself. Use spawn_agent for sub-agents, close spawned panes when done, and use timer_fire_when_idle_* instead of wait_for_pattern to wait for send_message replies."
+const baseServerInstructions = "You are inside patterm. Use these MCP tools; do not launch patterm or poke its Unix socket yourself. Use spawn_agent for sub-agents, close spawned panes when done, and use timer_fire_when_idle_* instead of wait_for_pattern to wait for send_message replies."
+
+func serverInstructions(taskBound bool) string {
+	if !taskBound {
+		return baseServerInstructions
+	}
+	return baseServerInstructions + " This MCP connection is task-bound; call whoami for the task, and register git worktrees you create or use with task_register_worktree."
+}
 
 // toolDescriptor is the shape returned by `tools/list`. inputSchema is
 // a JSON Schema object — we provide a minimal `{type: "object"}` schema
@@ -108,7 +115,7 @@ func arrayOfStringsProp(desc string) map[string]any {
 // toolCatalog is the full list advertised via tools/list. Descriptions
 // are intentionally short — clients are expected to fetch help() for
 // detail. Schemas mirror the param structs in tools.go.
-func toolCatalog(role CallerRole) []toolDescriptor {
+func toolCatalog(role CallerRole, taskBound bool) []toolDescriptor {
 	tools := []toolDescriptor{
 		{
 			Name:        "spawn_agent",
@@ -382,6 +389,14 @@ func toolCatalog(role CallerRole) []toolDescriptor {
 				"name": stringProp("Scratchpad name."),
 			}, []string{"name"}),
 		},
+		{
+			Name:        "task_register_worktree",
+			Description: "Register a git worktree path for the current task.",
+			InputSchema: objectSchema(map[string]any{
+				"path":   stringProp("Absolute path, or path relative to this process working directory."),
+				"branch": stringProp("Git branch name, if known."),
+			}, []string{"path"}),
+		},
 		{
 			Name:        "whoami",
 			Description: "Return caller identity, role, parent, and project metadata.",
@@ -397,14 +412,15 @@ func toolCatalog(role CallerRole) []toolDescriptor {
 			}, nil),
 		},
 	}
-	if role != RoleSubAgent {
-		return tools
-	}
 	filtered := tools[:0]
 	for _, tool := range tools {
-		if tool.Name != "spawn_agent" {
-			filtered = append(filtered, tool)
+		if role == RoleSubAgent && tool.Name == "spawn_agent" {
+			continue
 		}
+		if !taskBound && tool.Name == "task_register_worktree" {
+			continue
+		}
+		filtered = append(filtered, tool)
 	}
 	return filtered
 }
@@ -426,13 +442,20 @@ func (s *Server) handleProtocolMethod(callerID, method string, params json.RawMe
 		if protoVersion == "" {
 			protoVersion = supportedProtocolVersion
 		}
+		taskBound := false
+		s.mu.Lock()
+		host := s.host
+		s.mu.Unlock()
+		if host != nil {
+			_, taskBound = host.CallerTask(callerID)
+		}
 		result := map[string]any{
 			"protocolVersion": protoVersion,
 			"capabilities": map[string]any{
 				"tools": map[string]any{"listChanged": false},
 			},
 			"serverInfo":   serverInfo,
-			"instructions": serverInstructions,
+			"instructions": serverInstructions(taskBound),
 		}
 		return result, true, 0, "", nil
 
@@ -446,13 +469,15 @@ func (s *Server) handleProtocolMethod(callerID, method string, params json.RawMe
 
 	case "tools/list":
 		role := RoleOrchestrator
+		taskBound := false
 		s.mu.Lock()
 		host := s.host
 		s.mu.Unlock()
 		if host != nil {
 			role = host.CallerRole(callerID)
+			_, taskBound = host.CallerTask(callerID)
 		}
-		return map[string]any{"tools": toolCatalog(role)}, true, 0, "", nil
+		return map[string]any{"tools": toolCatalog(role, taskBound)}, true, 0, "", nil
 
 	case "tools/call":
 		var p struct {