feat: import agents_and_robots platform as unibots (Matrix-out, unibus transport)

Reemplaza el scaffold del echobot por la plataforma completa de bots traida
desde ~/DataProyects/Github/agents_and_robots tras la operacion Matrix-out:
los bots ya no hablan por Matrix sino por el bus unibus (modelo todo-rooms +
E2E via shell/transportunibus sobre github.com/enmanuel/unibus/pkg/client).

- go.mod: replace de unibus -> ../unibus y de fn-registry -> ../../../.. (paths
  relativos reajustados a la nueva ubicacion dentro de fn_registry).
- app.md: bump a 0.2.0, descripcion + arquitectura + comandos + gotchas reales.
- modulo Go conservado como github.com/enmanuel/agents (sin reescribir imports).

agents_and_robots queda archivado como museo de la era Matrix.

pkg/decision/engine.go

@@ -0,0 +1,76 @@
+package decision
+
+import (
+	"strings"
+)
+
+// Rule maps a condition to a set of actions.
+type Rule struct {
+	Name    string
+	Match   MatchFunc
+	Actions []Action
+}
+
+// MatchFunc is a pure predicate over a MessageContext.
+type MatchFunc func(ctx MessageContext) bool
+
+// Evaluate runs all rules against the context and returns the matching actions. Pure.
+func Evaluate(ctx MessageContext, rules []Rule) []Action {
+	var actions []Action
+	for _, rule := range rules {
+		if rule.Match(ctx) {
+			actions = append(actions, rule.Actions...)
+		}
+	}
+	return actions
+}
+
+// MatchCommand returns a MatchFunc that matches when the command equals cmd.
+func MatchCommand(cmd string) MatchFunc {
+	return func(ctx MessageContext) bool {
+		return strings.EqualFold(ctx.Command, cmd)
+	}
+}
+
+// MatchPrefix returns a MatchFunc that matches when content starts with prefix.
+func MatchPrefix(prefix string) MatchFunc {
+	return func(ctx MessageContext) bool {
+		return strings.HasPrefix(ctx.Content, prefix)
+	}
+}
+
+// MatchAny returns a MatchFunc that matches any message.
+func MatchAny() MatchFunc {
+	return func(_ MessageContext) bool { return true }
+}
+
+// MatchMinPowerLevel returns a MatchFunc that requires a minimum Matrix power level.
+func MatchMinPowerLevel(level int) MatchFunc {
+	return func(ctx MessageContext) bool {
+		return ctx.PowerLevel >= level
+	}
+}
+
+// And composes multiple MatchFuncs with logical AND.
+func And(fns ...MatchFunc) MatchFunc {
+	return func(ctx MessageContext) bool {
+		for _, fn := range fns {
+			if !fn(ctx) {
+				return false
+			}
+		}
+		return true
+	}
+}
+
+// Or composes multiple MatchFuncs with logical OR.
+func Or(fns ...MatchFunc) MatchFunc {
+	return func(ctx MessageContext) bool {
+		for _, fn := range fns {
+			if fn(ctx) {
+				return true
+			}
+		}
+		return false
+	}
+}

pkg/decision/types.go

@@ -0,0 +1,66 @@
+// Package decision implements the pure decision engine.
+// Input: MessageContext. Output: []Action. Zero side effects.
+package decision
+
+import "github.com/enmanuel/agents/pkg/tools"
+
+// MessageContext holds all the information about an incoming message.
+type MessageContext struct {
+	SenderID    string
+	SenderName  string
+	RoomID      string
+	EventID     string   // Matrix event ID of the incoming message
+	Content     string
+	Command     string   // parsed command name, e.g. "deploy"
+	Args        []string // parsed arguments
+	PowerLevel  int
+	IsDirectMsg bool
+	IsMention   bool
+	ThreadID    string
+}
+
+// ActionKind is the type of action to perform.
+type ActionKind string
+
+const (
+	ActionKindReply   ActionKind = "reply"
+	ActionKindSSH     ActionKind = "ssh"
+	ActionKindHTTP    ActionKind = "http"
+	ActionKindScript  ActionKind = "script"
+	ActionKindFileOps ActionKind = "file_ops"
+	ActionKindMCP     ActionKind = "mcp"
+	ActionKindLLM     ActionKind = "llm"
+	ActionKindDelegate ActionKind = "delegate"
+)
+
+// Action is a pure description of what the shell should do.
+// It is a tagged union — only the field matching Kind is set.
+type Action struct {
+	Kind     ActionKind
+	Reply    *ReplyAction
+	SSH      *tools.SSHCommandSpec
+	HTTP     *tools.HTTPCallSpec
+	Script   *tools.ScriptSpec
+	FileOps  *tools.FileOpsSpec
+	MCP      *tools.MCPCallSpec
+	LLM      *LLMAction
+	Delegate *DelegateAction
+}
+
+type ReplyAction struct {
+	Content    string
+	ThreadID   string // empty = new thread
+	InReplyTo  string // Matrix event ID to reply to (m.in_reply_to)
+	Reaction   string // optional Matrix reaction
+}
+
+type LLMAction struct {
+	ContextKey string // key to look up conversation history
+	ExtraTools []string // additional tool names to make available
+}
+
+type DelegateAction struct {
+	TargetAgentID string
+	Task          string
+	Context       map[string]string
+}