diff --git a/ingestion/internal/wing/resolve.go b/ingestion/internal/wing/resolve.go
new file mode 100644
index 0000000..1dd35a2
--- /dev/null
+++ b/ingestion/internal/wing/resolve.go
@@ -0,0 +1,169 @@
+// Package wing decides which brain wing an incoming raw note belongs to
+// without the human typing it (hyperguild#205).
+//
+// The contract is conservative: a note is placed automatically only when the
+// decision is explicit, or when two independent opinions (an LLM and a
+// deterministic scorer) agree with enough confidence on a wing that is both
+// known and eligible. Everything else is an Exception for a human to approve.
+// A wing is never created here, and a wing the caller does not mark eligible
+// (client wings, anything not deliberately tagged) is never auto-assigned.
+package wing
+
+import (
+	"context"
+	"fmt"
+	"strings"
+)
+
+// Source says how a Decision was reached.
+type Source string
+
+const (
+	Explicit   Source = "explicit"   // subfolder or frontmatter named the wing
+	Classified Source = "classified" // classifier + scorer agreed, confident
+	Exception  Source = "exception"  // needs a human
+)
+
+// Note is what the resolver sees of an incoming raw note.
+type Note struct {
+	Dir             string // first subfolder under raw/, "" when dropped at the top
+	FrontmatterWing string // `wing:` from the note's frontmatter, "" if absent
+	Text            string
+}
+
+// Suggestion is a Classifier's answer. An empty Wing means "none fits".
+type Suggestion struct {
+	Wing       string
+	Confidence float64 // 0..1
+	Reason     string
+}
+
+// Classifier proposes a wing from the candidates. Implementations must run on
+// a local model; the resolver cannot enforce that.
+type Classifier interface {
+	Classify(ctx context.Context, text string, candidates []string) (Suggestion, error)
+}
+
+// Scorer is an independent, deterministic opinion (e.g. BM25 against each
+// wing's index). Higher is better; the key is the wing name.
+type Scorer interface {
+	Score(text string) map[string]float64
+}
+
+// Decision is the outcome. For an Exception, Wing holds the proposal when
+// there was one (so a reviewer can approve it) and is empty otherwise.
+type Decision struct {
+	Wing       string
+	Source     Source
+	Confidence float64
+	Reason     string
+}
+
+// Resolver holds the policy. Known is every existing wing; Eligible reports
+// whether a known wing may be assigned automatically.
+type Resolver struct {
+	Known      []string
+	Eligible   func(wing string) bool
+	Classifier Classifier
+	Scorer     Scorer
+	Threshold  float64
+}
+
+// Resolve never returns an error: anything it cannot decide safely is an
+// Exception with the reason spelled out.
+func (r Resolver) Resolve(ctx context.Context, n Note) Decision {
+	dir := norm(n.Dir)
+	fm := norm(n.FrontmatterWing)
+	switch {
+	case dir != "" && fm != "" && dir != fm:
+		return exception("", 0, fmt.Sprintf("subfolder %q and frontmatter wing %q disagree", dir, fm))
+	case dir != "":
+		return r.explicit(dir, "subfolder")
+	case fm != "":
+		return r.explicit(fm, "frontmatter")
+	}
+	return r.classify(ctx, n)
+}
+
+func (r Resolver) explicit(w, via string) Decision {
+	if why := r.refuse(w); why != "" {
+		return exception(w, 0, fmt.Sprintf("%s names %q: %s", via, w, why))
+	}
+	return Decision{Wing: w, Source: Explicit, Confidence: 1, Reason: "named by " + via}
+}
+
+func (r Resolver) classify(ctx context.Context, n Note) Decision {
+	if r.Classifier == nil {
+		return exception("", 0, "no classifier configured")
+	}
+	s, err := r.Classifier.Classify(ctx, n.Text, r.Known)
+	if err != nil {
+		return exception("", 0, fmt.Sprintf("classifier failed: %v", err))
+	}
+	w := norm(s.Wing)
+	if w == "" {
+		return exception("", s.Confidence, "classifier found no fitting wing")
+	}
+	if why := r.refuse(w); why != "" {
+		return exception(w, s.Confidence, fmt.Sprintf("classifier proposed %q: %s", w, why))
+	}
+	if s.Confidence < r.Threshold {
+		return exception(w, s.Confidence, fmt.Sprintf("confidence %.2f below threshold %.2f", s.Confidence, r.Threshold))
+	}
+	top, ok := r.scorerTop(n.Text)
+	if !ok {
+		return exception(w, s.Confidence, "scorer has no clear opinion to cross-check against")
+	}
+	if top != w {
+		return exception(w, s.Confidence, fmt.Sprintf("classifier says %q, scorer says %q", w, top))
+	}
+	return Decision{Wing: w, Source: Classified, Confidence: s.Confidence,
+		Reason: fmt.Sprintf("classifier and scorer agree (%.2f): %s", s.Confidence, s.Reason)}
+}
+
+// refuse returns why a wing may not be auto-assigned, or "" if it may.
+func (r Resolver) refuse(w string) string {
+	if !r.known(w) {
+		return "not an existing wing (new wings are never created automatically)"
+	}
+	if r.Eligible == nil || !r.Eligible(w) {
+		return "not eligible for automatic assignment"
+	}
+	return ""
+}
+
+func (r Resolver) known(w string) bool {
+	for _, k := range r.Known {
+		if norm(k) == w {
+			return true
+		}
+	}
+	return false
+}
+
+// scorerTop returns the single best-scoring wing; a missing scorer, no scores,
+// or a tie at the top is "no clear opinion".
+func (r Resolver) scorerTop(text string) (string, bool) {
+	if r.Scorer == nil {
+		return "", false
+	}
+	best, bestScore, tied := "", 0.0, false
+	for k, v := range r.Scorer.Score(text) {
+		switch {
+		case v > bestScore:
+			best, bestScore, tied = norm(k), v, false
+		case v == bestScore && v > 0:
+			tied = true
+		}
+	}
+	if best == "" || tied {
+		return "", false
+	}
+	return best, true
+}
+
+func exception(w string, conf float64, reason string) Decision {
+	return Decision{Wing: w, Source: Exception, Confidence: conf, Reason: reason}
+}
+
+func norm(s string) string { return strings.ToLower(strings.TrimSpace(s)) }
diff --git a/ingestion/internal/wing/resolve_test.go b/ingestion/internal/wing/resolve_test.go
new file mode 100644
index 0000000..7d78e03
--- /dev/null
+++ b/ingestion/internal/wing/resolve_test.go
@@ -0,0 +1,112 @@
+package wing_test
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/mathiasbq/hyperguild/ingestion/internal/wing"
+)
+
+type fakeClassifier struct {
+	s     wing.Suggestion
+	err   error
+	calls int
+}
+
+func (f *fakeClassifier) Classify(_ context.Context, _ string, _ []string) (wing.Suggestion, error) {
+	f.calls++
+	return f.s, f.err
+}
+
+type fakeScorer map[string]float64
+
+func (f fakeScorer) Score(string) map[string]float64 { return f }
+
+// eligibleExcept allows every name except the listed ones. Being permissive on
+// names it has never heard of means only the "known wing" check can stop an
+// invented wing, so a test of that check cannot pass by accident.
+func eligibleExcept(names ...string) func(string) bool {
+	deny := map[string]bool{}
+	for _, n := range names {
+		deny[n] = true
+	}
+	return func(w string) bool { return !deny[w] }
+}
+
+func newResolver(c wing.Classifier, s wing.Scorer) wing.Resolver {
+	return wing.Resolver{
+		Known:      []string{"homelab", "hyperguild", "tapir", "rikatillsammans"},
+		Eligible:   eligibleExcept("rikatillsammans"), // a client wing: known, never auto
+		Classifier: c,
+		Scorer:     s,
+		Threshold:  0.8,
+	}
+}
+
+func TestResolve_ExplicitSignal(t *testing.T) {
+	tests := []struct {
+		name     string
+		note     wing.Note
+		want     wing.Source
+		wantWing string
+	}{
+		{"subfolder of a known eligible wing", wing.Note{Dir: "homelab"}, wing.Explicit, "homelab"},
+		{"frontmatter of a known eligible wing", wing.Note{FrontmatterWing: "tapir"}, wing.Explicit, "tapir"},
+		{"subfolder and frontmatter agree", wing.Note{Dir: "tapir", FrontmatterWing: "tapir"}, wing.Explicit, "tapir"},
+		{"subfolder and frontmatter disagree", wing.Note{Dir: "tapir", FrontmatterWing: "homelab"}, wing.Exception, ""},
+		{"unknown wing is never created", wing.Note{Dir: "hoemlab"}, wing.Exception, "hoemlab"},
+		{"known but not eligible (client) wing is never auto-assigned", wing.Note{Dir: "rikatillsammans"}, wing.Exception, "rikatillsammans"},
+		{"subfolder is case-insensitive", wing.Note{Dir: "HomeLab"}, wing.Explicit, "homelab"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			c := &fakeClassifier{}
+			d := newResolver(c, fakeScorer{}).Resolve(context.Background(), tt.note)
+			assert.Equal(t, tt.want, d.Source)
+			assert.Equal(t, tt.wantWing, d.Wing)
+			assert.Zero(t, c.calls, "an explicit signal must not spend an LLM call")
+			assert.NotEmpty(t, d.Reason)
+		})
+	}
+}
+
+func TestResolve_Classified(t *testing.T) {
+	tests := []struct {
+		name     string
+		sugg     wing.Suggestion
+		err      error
+		scores   fakeScorer
+		want     wing.Source
+		wantWing string
+	}{
+		{"confident and scorer agrees", wing.Suggestion{Wing: "tapir", Confidence: 0.9}, nil, fakeScorer{"tapir": 3, "homelab": 1}, wing.Classified, "tapir"},
+		{"confidence exactly at threshold passes", wing.Suggestion{Wing: "tapir", Confidence: 0.8}, nil, fakeScorer{"tapir": 3}, wing.Classified, "tapir"},
+		{"below threshold is an exception, proposal kept", wing.Suggestion{Wing: "tapir", Confidence: 0.79}, nil, fakeScorer{"tapir": 3}, wing.Exception, "tapir"},
+		{"scorer disagrees", wing.Suggestion{Wing: "tapir", Confidence: 0.95}, nil, fakeScorer{"homelab": 5, "tapir": 1}, wing.Exception, "tapir"},
+		{"scorer has no opinion also needs review", wing.Suggestion{Wing: "tapir", Confidence: 0.95}, nil, fakeScorer{}, wing.Exception, "tapir"},
+		{"classifier proposes a client wing", wing.Suggestion{Wing: "rikatillsammans", Confidence: 0.99}, nil, fakeScorer{"rikatillsammans": 9}, wing.Exception, "rikatillsammans"},
+		{"classifier invents a wing", wing.Suggestion{Wing: "brand-new-wing", Confidence: 0.99}, nil, fakeScorer{"brand-new-wing": 9}, wing.Exception, "brand-new-wing"},
+		{"classifier abstains", wing.Suggestion{Wing: "", Confidence: 0}, nil, fakeScorer{"tapir": 3}, wing.Exception, ""},
+		{"classifier error", wing.Suggestion{}, errors.New("llm down"), fakeScorer{"tapir": 3}, wing.Exception, ""},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			c := &fakeClassifier{s: tt.sugg, err: tt.err}
+			d := newResolver(c, tt.scores).Resolve(context.Background(), wing.Note{Text: "some note"})
+			assert.Equal(t, tt.want, d.Source)
+			assert.Equal(t, tt.wantWing, d.Wing)
+			assert.NotEmpty(t, d.Reason, "every decision says why, so a spot-check can judge it")
+			assert.Equal(t, 1, c.calls)
+		})
+	}
+}
+
+func TestResolve_NilDependenciesFailClosed(t *testing.T) {
+	r := wing.Resolver{Known: []string{"tapir"}, Eligible: eligibleExcept(), Threshold: 0.8}
+	d := r.Resolve(context.Background(), wing.Note{Text: "x"})
+	require.Equal(t, wing.Exception, d.Source, "no classifier configured must route to review, not panic or guess")
+}