G §683: a start composes the modules whose kept want and entry it holds before its other inputs are read

The node's own record comes from the node-engine's statement of itself, taken in memory with no bus.

Builds: design 47 G A-117, A-120, §683, A-95
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h

internal/selfcompose/entries_test.go

@@ -125,10 +125,19 @@ func composeFromEntries(t *testing.T) {
 	mu.Unlock()
 	env2 := b.env()
 	env2.Entry, env2.ComposedState = EntryCall(ask), state
+	// The node's own record, stated by the node-engine of itself in memory (A-120).
+	env2.NodeRecord = func() (nodeengine.NodeRecord, bool) {
+		return nodeengine.NodeRecord{Node: "n1", TunnelKey: "k", SealingKey: "sk", Capabilities: []string{"systemd"}}, true
+	}
 	c2 := New(env2)
-	if _, err := c2.Watch(ctx, "n1.>"); err != nil {
+	out2, err := c2.Watch(ctx, "n1.>")
+	if err != nil {
 		t.Fatal(err)
 	}
+	// And composes the module it kept a want and an entry of before any input is read, nothing of the others (design 47 G §683, A-117).
+	if u := next(t, out2); u.Key != lemursKey || u.Deleted {
+		t.Errorf("the early pass handed %q, want the composition %s of lemurs", u.Key, lemursKey)
+	}
 	c2.mu.Lock()
 	kept, keptWant := c2.keptEnt[fp], c2.wants["lemurs"].Fp
 	c2.mu.Unlock()

internal/selfcompose/selfcompose.go

@@ -61,6 +61,9 @@ const ResolvedBucket = "mesh-config_resolved"
 // Env is what the composer needs of the node.
 type Env struct {
 	Node string
+	// NodeRecord is the node's own record as the node-engine states it of itself, held in memory; the early pass of a start composes
+	// with it before the have bucket is read (design 47 G A-120). Nil, or false, has none.
+	NodeRecord func() (nodeengine.NodeRecord, bool)
 	// EntryNotFound is told when the catalog half answered it holds no entry of a fingerprint (notFound), and when that is no longer so:
 	// the entry answered, or nothing the node holds names it (design 47 G §614, A-117). Nil tells nobody.
 	EntryNotFound func(fp string, notFound bool)
@@ -241,6 +244,8 @@ type Composer struct {
 	asked chan chan Pass
 	// passing is set while a pass is made.
 	passing atomic.Bool
+	// early is true while the early pass of a start runs (design 47 G §683, A-117).
+	early atomic.Bool
 	// last is how the last pass went, under mu.
 	last Pass
 	// watching says the composer's loop runs (Watch), so an ask of a pass can be answered.
@@ -611,6 +616,20 @@ func (c *Composer) Watch(ctx context.Context, _ string) (<-chan agent.Update, er
 		// input moves (issue 1126, 2026-10-28).
 		var again <-chan time.Time
 		var replies []chan Pass
+		// At a start, until its assignments, haves and resolved values are read, the node composes the modules whose kept want and
+		// kept entry it holds, so the bus module and the indexer start while both are down (design 47 G §683, A-95, A-117).
+		if c.standing() {
+			c.passing.Store(true)
+			updates := c.composeEarly(ctx)
+			c.passing.Store(false)
+			for _, u := range updates {
+				select {
+				case out <- u:
+				case <-ctx.Done():
+					return
+				}
+			}
+		}
 		for {
 			// Drain whatever came, then compose once for all of it.
 			select {
@@ -975,6 +994,7 @@ func (c *Composer) takeValue(u agent.Update) {
 // compose composes the node once and answers the updates to hand: each composition whose digest differs from the one
 // handed, and a deletion for each handed one no want names any more.
 func (c *Composer) compose(ctx context.Context) []agent.Update {
+	early := c.early.Load()
 	pass := Pass{}
 	defer func() {
 		pass.At = time.Now()
@@ -1013,6 +1033,9 @@ func (c *Composer) compose(ctx context.Context) []agent.Update {
 		if module == agent.NodeModule {
 			continue
 		}
+		if early && !c.stands(module, w) {
+			continue
+		}
 		fps[module] = w.Fp
 		if m, ok := c.modules[module]; ok && m.Fp2 != w.Fp {
 			behind = append(behind, module)
@@ -1113,6 +1136,11 @@ func (c *Composer) compose(ctx context.Context) []agent.Update {
 		} else {
 			c.paid()
 		}
+		if early {
+			// Inputs not yet read may refuse it: nothing is marked, and the full pass follows when they are read.
+			c.env.Say("the node's early composition of the modules it kept is refused, and the full pass follows: " + why)
+			return nil
+		}
 		pass.Refused = why
 		// Said before the agent marks the modules: the marks read each have first, which a paused bus delays.
 		c.sayOnce("the node cannot compose its modules, and keeps running what it runs: " + why)
@@ -1232,6 +1260,9 @@ func (c *Composer) compose(ctx context.Context) []agent.Update {
 		}
 		pubComps[key] = comp
 	}
+	if early {
+		return out // what the early pass handed is composed from kept state alone: nothing is published from it
+	}
 	c.pubAt = &published{scope: scope, fps: maps.Clone(fps), comps: pubComps, held: maps.Clone(held), placed: placedMods,
 		ran: ranOf(running)}
 	c.pubDue = true
@@ -2431,3 +2462,69 @@ func (c *Composer) EngineModule() string {
 	defer c.mu.Unlock()
 	return c.engine
 }
+
+// stands says the want of a module stands for its placement in the early pass of a start: its want is a kept one the live read has
+// not answered, and the entry of its build is kept (design 47 G A-117).
+func (c *Composer) stands(module string, w meshwants.WantsByWantNodeModuleValue) bool {
+	if !c.byEntries() || !c.keptWants[module] {
+		return false
+	}
+	k, ok := c.keptEnt[w.Fp]
+	return ok && k.entry.Module != ""
+}
+
+// standing says the composer holds a kept want and the kept entry of its build, so an early pass has something to compose.
+func (c *Composer) standing() bool {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	for module, w := range c.wants {
+		if module != agent.NodeModule && c.stands(module, w) {
+			return true
+		}
+	}
+	return false
+}
+
+// composeEarly is the pass of a start before the assignments, haves and resolved values are read: it composes only the modules whose
+// kept want and kept entry it holds, a kept want standing for their placement, and leaves every other module as it runs; the full
+// pass follows once the inputs are read (design 47 G §683, A-95, A-117).
+func (c *Composer) composeEarly(ctx context.Context) []agent.Update {
+	node := c.env.Node
+	c.mu.Lock()
+	_, hadRecord := c.records[node]
+	if !hadRecord && c.env.NodeRecord != nil {
+		if rec, ok := c.env.NodeRecord(); ok {
+			c.records[node] = rec
+		} else {
+			hadRecord = true // nothing laid, nothing to take away
+		}
+	}
+	_, had := c.assignments[node]
+	if !had {
+		p := meshmoduleassigner.Assignments{Node: node}
+		for module, w := range c.wants {
+			if module != agent.NodeModule && c.stands(module, w) {
+				p.Modules = append(p.Modules, meshmoduleassigner.PlacedModule{Module: module})
+			}
+		}
+		sort.Slice(p.Modules, func(i, j int) bool { return p.Modules[i].Module < p.Modules[j].Module })
+		c.assignments[node] = p
+	}
+	c.mu.Unlock()
+	c.early.Store(true)
+	defer func() {
+		c.early.Store(false)
+		if !hadRecord {
+			c.mu.Lock()
+			delete(c.records, node)
+			c.mu.Unlock()
+		}
+		if !had {
+			c.mu.Lock()
+			delete(c.assignments, node)
+			c.mu.Unlock()
+		}
+	}()
+	c.env.Say("the node composes the modules it kept a want and an entry of, before its other inputs are read")
+	return c.compose(ctx)
+}