C0b: wire Critic + Delivery into run.Executor

Continues finishing the executor's run.Ports wiring (after C0's Palette).

Critic (run/critic.go): when Ports.Critic is set and the agent enables it, the
executor calls Monitor at run start, feeds RecordStep/RecordToolStart from the
step observer, drains the critic's Steer messages into the loop via
agent.WithSteer, and binds the run's hard cancellation to the critic's
(extendable) Deadline through a watch goroutine — a healthy-but-slow run gets
room while a hung one is killed. Stop() on run end. Soft timeout from
Defaults.CriticSoftTimeout (default 90s). nil-safe: no critic / not-enabled =
no-op.

Delivery (run/executor.go deliver): after the run, when Ports.Delivery is set
and inv.DeliveryID is non-empty, the executor posts Result.Output (or
DeliverError on failure) to a host-interpreted deliver.Target
{inv.DeliveryKind, inv.DeliveryID}. Empty target = caller reads Result.Output
itself (the synchronous default; the `.agent run` canary). Best-effort +
detached.

tool.Invocation gains DeliveryKind/DeliveryID (host-set egress target).

Tests: critic monitored/fed/steered/stopped when enabled, untouched when not;
delivery posts on a target, skips without one. Deferred: Checkpointer (needs a
majordomo hook to snapshot the running message history).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

run/executor.go

@@ -10,6 +10,7 @@ import (
 	"gitea.stevedudenhoeffer.com/steve/majordomo/llm"
 
 	"gitea.stevedudenhoeffer.com/steve/executus/compact"
+	"gitea.stevedudenhoeffer.com/steve/executus/deliver"
 	"gitea.stevedudenhoeffer.com/steve/executus/tool"
 )
 
@@ -27,6 +28,7 @@ type Defaults struct {
 	MaxConsecutiveToolErrors int           // loop guard; default 3
 	MaxSameToolCallRepeats   int           // retry-storm guard; default 3
 	CompactionThresholdRatio float64       // fraction of model context to compact at; default 0.7
+	CriticSoftTimeout        time.Duration // idle window before the critic wakes; default 90s
 }
 
 func (d Defaults) withFallbacks() Defaults {
@@ -48,6 +50,9 @@ func (d Defaults) withFallbacks() Defaults {
 	if d.CompactionThresholdRatio <= 0 {
 		d.CompactionThresholdRatio = 0.7
 	}
+	if d.CriticSoftTimeout <= 0 {
+		d.CriticSoftTimeout = 90 * time.Second
+	}
 	return d
 }
 
@@ -141,19 +146,20 @@ func (e *Executor) Run(ctx context.Context, ra RunnableAgent, inv tool.Invocatio
 
 	// Audit start (optional). The recorder satisfies RunTally; stamp it on the
 	// invocation so a self-status tool can read live progress.
+	info := RunInfo{
+		RunID:       inv.RunID,
+		SubjectID:   ra.ID,
+		Name:        ra.Name,
+		CallerID:    inv.CallerID,
+		ChannelID:   inv.ChannelID,
+		ParentRunID: inv.ParentRunID,
+		Inputs:      inv.SkillInputs,
+		StartedAt:   started,
+	}
 	var rec RunRecorder
 	var stateAcc *RunStateAccessor
 	if e.cfg.Ports.Audit != nil {
-		rec = e.cfg.Ports.Audit.StartRun(ctx, RunInfo{
-			RunID:       inv.RunID,
-			SubjectID:   ra.ID,
-			Name:        ra.Name,
-			CallerID:    inv.CallerID,
-			ChannelID:   inv.ChannelID,
-			ParentRunID: inv.ParentRunID,
-			Inputs:      inv.SkillInputs,
-			StartedAt:   started,
-		})
+		rec = e.cfg.Ports.Audit.StartRun(ctx, info)
 	}
 	if rec != nil {
 		stateAcc = NewRunStateAccessor(rec, maxIter, 0, started)
@@ -186,6 +192,12 @@ func (e *Executor) Run(ctx context.Context, ra RunnableAgent, inv tool.Invocatio
 	runCtx, mergeCancel := MergeCancellation(runCtx, ctx)
 	defer mergeCancel()
 
+	// Critic (optional): monitors the run for a stall, can nudge/extend/kill via
+	// its host Escalator. Its hard deadline is bound to runCtx (cancel on pass).
+	// nil-safe: no-op when no critic is configured or the agent doesn't enable it.
+	critic, stopCritic := e.startCritic(runCtx, cancel, ra, info)
+	defer stopCritic()
+
 	// Step instrumentation: accumulate Result.Steps + fire inv.OnStep, feed the
 	// audit recorder, and keep the live iteration counter fresh. majordomo's
 	// step observer hands us each completed iteration; we zip the model's tool
@@ -200,6 +212,7 @@ func (e *Executor) Run(ctx context.Context, ra RunnableAgent, inv tool.Invocatio
 		if rec != nil {
 			rec.OnStep(s.Index, s.Response)
 		}
+		critic.recordStep(s.Index) // keep the critic's activity clock fresh
 		var calls []llm.ToolCall
 		if s.Response != nil {
 			calls = s.Response.ToolCalls
@@ -210,6 +223,7 @@ func (e *Executor) Run(ctx context.Context, ra RunnableAgent, inv tool.Invocatio
 		}
 		for i := 0; i < n; i++ {
 			call, r := calls[i], s.Results[i]
+			critic.recordToolStart(call.Name, string(call.Arguments))
 			emitter.toolStart(runCtx, call.Name, call.Arguments)
 			emitter.toolEnd(runCtx, call, r.Content, r.IsError)
 			if rec != nil {
@@ -244,7 +258,7 @@ func (e *Executor) Run(ctx context.Context, ra RunnableAgent, inv tool.Invocatio
 	}
 
 	ag := agent.New(model, e.systemPrompt(ra), opts...)
-	runRes, runErr := ag.Run(runCtx, input)
+	runRes, runErr := ag.Run(runCtx, input, critic.steerOptions()...)
 
 	status := statusFor(runErr)
 	if runRes != nil {
@@ -258,6 +272,7 @@ func (e *Executor) Run(ctx context.Context, ra RunnableAgent, inv tool.Invocatio
 	if e.cfg.Ports.Budget != nil {
 		e.cfg.Ports.Budget.Commit(detach(ctx), inv.CallerID, time.Since(started).Seconds())
 	}
+	e.deliver(ctx, inv, res, runErr)
 	return res
 }
 
@@ -316,6 +331,23 @@ func (e *Executor) compactionThreshold(tier string) int {
 	return int(float64(max) * e.cfg.Defaults.CompactionThresholdRatio)
 }
 
+// deliver posts the run's output (or error) via run.Ports.Delivery when both a
+// Delivery and a target (inv.DeliveryID) are set. No target = the caller reads
+// Result.Output itself (the synchronous default). Best-effort + detached: a
+// delivery failure must not change the run's outcome.
+func (e *Executor) deliver(ctx context.Context, inv tool.Invocation, res Result, runErr error) {
+	if e.cfg.Ports.Delivery == nil || inv.DeliveryID == "" {
+		return
+	}
+	target := deliver.Target{Kind: inv.DeliveryKind, ID: inv.DeliveryID}
+	dctx := detach(ctx)
+	if runErr != nil {
+		_ = e.cfg.Ports.Delivery.DeliverError(dctx, target, runErr)
+		return
+	}
+	_, _ = e.cfg.Ports.Delivery.Deliver(dctx, target, res.Output, nil)
+}
+
 // detach derives a bounded cleanup context off ctx, detached from its
 // cancellation, for post-run writes. The cancel is intentionally not returned;
 // CleanupContextTimeout bounds the lifetime.