initial agent-mgr: app builder platform MVP

Go API server + Preact UI + Claude Code adapter.
- App-centric model (ideas, not repos)
- AgentProvider interface for multi-agent support
- K8s pod lifecycle for sandboxed agent sessions
- Gitea integration (create repos, push branches)
- WebSocket streaming for live session output
- Woodpecker CI/CD pipelines (kaniko build + kubectl deploy)

internal/api/sessions.go

@@ -0,0 +1,136 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/agentsphere/agent-mgr/internal/store"
+	"github.com/go-chi/chi/v5"
+	"github.com/google/uuid"
+)
+
+type createSessionRequest struct {
+	Prompt   string          `json:"prompt"`
+	Provider string          `json:"provider,omitempty"`
+	Config   json.RawMessage `json:"config,omitempty"`
+}
+
+type sendMessageRequest struct {
+	Message string `json:"message"`
+}
+
+func (s *Server) createSession(w http.ResponseWriter, r *http.Request) {
+	appID, err := uuid.Parse(chi.URLParam(r, "appID"))
+	if err != nil {
+		http.Error(w, `{"error":"invalid app id"}`, http.StatusBadRequest)
+		return
+	}
+
+	var req createSessionRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(w, `{"error":"invalid request body"}`, http.StatusBadRequest)
+		return
+	}
+	if req.Prompt == "" {
+		http.Error(w, `{"error":"prompt required"}`, http.StatusBadRequest)
+		return
+	}
+
+	app, err := s.store.GetApp(r.Context(), appID)
+	if err != nil || app == nil {
+		http.Error(w, `{"error":"app not found"}`, http.StatusNotFound)
+		return
+	}
+
+	sess, err := s.app.StartSession(r.Context(), app, req.Prompt, req.Provider, req.Config)
+	if err != nil {
+		s.log.Error("create session failed", "err", err)
+		http.Error(w, `{"error":"failed to create session"}`, http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusCreated)
+	json.NewEncoder(w).Encode(map[string]any{"session": sess})
+}
+
+func (s *Server) listSessions(w http.ResponseWriter, r *http.Request) {
+	appID, err := uuid.Parse(chi.URLParam(r, "appID"))
+	if err != nil {
+		http.Error(w, `{"error":"invalid app id"}`, http.StatusBadRequest)
+		return
+	}
+
+	sessions, err := s.store.ListSessionsByApp(r.Context(), appID)
+	if err != nil {
+		http.Error(w, `{"error":"failed to list sessions"}`, http.StatusInternalServerError)
+		return
+	}
+	if sessions == nil {
+		sessions = []store.Session{}
+	}
+
+	json.NewEncoder(w).Encode(map[string]any{"sessions": sessions})
+}
+
+func (s *Server) getSession(w http.ResponseWriter, r *http.Request) {
+	id, err := uuid.Parse(chi.URLParam(r, "sessionID"))
+	if err != nil {
+		http.Error(w, `{"error":"invalid session id"}`, http.StatusBadRequest)
+		return
+	}
+
+	sess, err := s.store.GetSession(r.Context(), id)
+	if err != nil || sess == nil {
+		http.Error(w, `{"error":"session not found"}`, http.StatusNotFound)
+		return
+	}
+
+	json.NewEncoder(w).Encode(map[string]any{"session": sess})
+}
+
+func (s *Server) stopSession(w http.ResponseWriter, r *http.Request) {
+	id, err := uuid.Parse(chi.URLParam(r, "sessionID"))
+	if err != nil {
+		http.Error(w, `{"error":"invalid session id"}`, http.StatusBadRequest)
+		return
+	}
+
+	if err := s.app.StopSession(r.Context(), id); err != nil {
+		s.log.Error("stop session failed", "err", err)
+		http.Error(w, `{"error":"failed to stop session"}`, http.StatusInternalServerError)
+		return
+	}
+
+	json.NewEncoder(w).Encode(map[string]any{"status": "stopped"})
+}
+
+func (s *Server) sendMessage(w http.ResponseWriter, r *http.Request) {
+	id, err := uuid.Parse(chi.URLParam(r, "sessionID"))
+	if err != nil {
+		http.Error(w, `{"error":"invalid session id"}`, http.StatusBadRequest)
+		return
+	}
+
+	var req sendMessageRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(w, `{"error":"invalid request body"}`, http.StatusBadRequest)
+		return
+	}
+	if req.Message == "" {
+		http.Error(w, `{"error":"message required"}`, http.StatusBadRequest)
+		return
+	}
+
+	if err := s.app.SendMessage(r.Context(), id, req.Message); err != nil {
+		s.log.Error("send message failed", "err", err)
+		http.Error(w, `{"error":"failed to send message"}`, http.StatusInternalServerError)
+		return
+	}
+
+	json.NewEncoder(w).Encode(map[string]any{"status": "sent"})
+}
+
+func (s *Server) listProviders(w http.ResponseWriter, r *http.Request) {
+	infos := s.registry.List()
+	json.NewEncoder(w).Encode(map[string]any{"providers": infos})
+}