docs: crear issues 0036-0041 — nuevas features del sistema

Issues planificados:
- 0036: Claude Code streaming de progreso en Matrix
- 0037: Agente que crea otros agentes/bots via Matrix
- 0038: Webapps y dashboards embebidos en Element via widgets
- 0039: Recordatorios dinámicos y crons que invocan agentes
- 0040: Soporte para mensajes de voz (audio → STT)
- 0041: Videollamadas con agentes via LiveKit

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

devagents/registry.go

@@ -0,0 +1,61 @@
+// Package agents provides a global registry for agent rule factories.
+//
+// Each agent package self-registers via init() using Register.
+// The launcher retrieves rules via GetRules without importing agent
+// packages explicitly (only blank imports are needed).
+package agents
+
+import (
+	"sync"
+
+	"github.com/enmanuel/agents/pkg/decision"
+)
+
+// RulesFunc is a factory that returns the decision rules for an agent.
+type RulesFunc func() []decision.Rule
+
+var (
+	registryMu sync.RWMutex
+	registry   = make(map[string]RulesFunc)
+)
+
+// Register adds a rule factory for the given agent ID.
+// Intended to be called from init() in each agent package.
+// Panics if the same ID is registered twice (catches copy-paste errors early).
+func Register(id string, fn RulesFunc) {
+	registryMu.Lock()
+	defer registryMu.Unlock()
+
+	if _, exists := registry[id]; exists {
+		panic("agents.Register: duplicate agent id: " + id)
+	}
+	registry[id] = fn
+}
+
+// GetRules returns the rule factory for the given agent ID.
+// Returns nil if no rules are registered (the agent is command-only).
+func GetRules(id string) RulesFunc {
+	registryMu.RLock()
+	defer registryMu.RUnlock()
+	return registry[id]
+}
+
+// RegisteredIDs returns a sorted list of all registered agent IDs.
+// Useful for debugging and diagnostics.
+func RegisteredIDs() []string {
+	registryMu.RLock()
+	defer registryMu.RUnlock()
+
+	ids := make([]string, 0, len(registry))
+	for id := range registry {
+		ids = append(ids, id)
+	}
+	return ids
+}
+
+// resetRegistry clears all registrations (for testing only).
+func resetRegistry() {
+	registryMu.Lock()
+	defer registryMu.Unlock()
+	registry = make(map[string]RulesFunc)
+}