feat: read codex agent definitions

internal/server/server.go

@@ -0,0 +1,37 @@
+package server
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"codex-agent-manager/internal/agents"
+	"codex-agent-manager/internal/app"
+)
+
+func New(cfg app.Config) http.Handler {
+	mux := http.NewServeMux()
+	agentStore := agents.Store{CodexHome: cfg.CodexHome}
+
+	mux.HandleFunc("/api/health", func(w http.ResponseWriter, r *http.Request) {
+		writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
+	})
+	mux.HandleFunc("/api/agents", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet {
+			writeJSON(w, http.StatusMethodNotAllowed, map[string]string{"error": "方法不允许"})
+			return
+		}
+		items, err := agentStore.List()
+		if err != nil {
+			writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
+			return
+		}
+		writeJSON(w, http.StatusOK, map[string]any{"items": items})
+	})
+	return mux
+}
+
+func writeJSON(w http.ResponseWriter, status int, body any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(body)
+}