feat(capture): remove summary->ai-sessions write path

ai-sessions#13: capture's `summary` field wrote a frontmatter shape
(title/harness/fidelity/captured_at/repos_touched) that ai-sessions'
own extract/audit pipeline can't parse -- silently invisible to that
repo's own audit tooling, and bypassing its redaction + Stage2
completeness gates by construction. Only 5 files ever landed this way
over 3 weeks; the summary capability's whole value (speed) fights
ai-sessions' whole value (redacted, audited, complete), so kill it
rather than build a second parse branch.

capture now persists insights -> brain and action items -> Gitea
tickets only. Removes Summary/SummaryResult/SummaryWriter and all
wiring (service, REST body, MCP tool schema); close-session updated to
stop assembling a summary payload. specs/capture-*.md kept as historical
record with a superseded note -- the feature shipped and is documented,
just no longer current behaviour.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WPdSHbp9Utb2hPFm9wDG59

ingestion/internal/capture/service_test.go

@@ -85,21 +85,6 @@ func (f *fakeTracker) CommentIssue(_ context.Context, repo string, number int, _
 	return IssueRef{Repo: repo, Number: number}, nil
 }
 
-type fakeSummary struct {
-	paths   []string
-	content []string
-	err     error
-}
-
-func (f *fakeSummary) WriteFile(_ context.Context, _, path, content string) error {
-	if f.err != nil {
-		return f.err
-	}
-	f.paths = append(f.paths, path)
-	f.content = append(f.content, content)
-	return nil
-}
-
 // fakePolicy derives from an explicit map; default Internal so tests pin
 // behaviour without depending on the real defaulting.
 type fakePolicy struct{ tags map[string]classification.Level }
@@ -135,8 +120,8 @@ func (f *fakeAudit) Record(_ context.Context, e AuditEntry, _ AuditOutcome) erro
 
 // --- helpers ---
 
-func newSvc(b BrainStore, tr IssueTracker, sw SummaryWriter, p ClassificationPolicy, a AuditSink) *Service {
-	s := NewService(b, tr, sw, p, a)
+func newSvc(b BrainStore, tr IssueTracker, p ClassificationPolicy, a AuditSink) *Service {
+	s := NewService(b, tr, p, a)
 	s.now = func() time.Time { return time.Date(2026, 6, 22, 12, 0, 0, 0, time.UTC) }
 	return s
 }
@@ -151,7 +136,7 @@ func TestCaptureHappyPath(t *testing.T) {
 	b := &fakeBrain{}
 	tr := &fakeTracker{}
 	au := &fakeAudit{}
-	svc := newSvc(b, tr, nil, fakePolicy{}, au)
+	svc := newSvc(b, tr, fakePolicy{}, au)
 
 	rec, err := svc.Capture(context.Background(), CaptureInput{
 		Context: baseCtx(),
@@ -180,7 +165,7 @@ func TestCaptureHappyPath(t *testing.T) {
 
 func TestCaptureSupersedeNotDuplicate(t *testing.T) {
 	b := &fakeBrain{}
-	svc := newSvc(b, &fakeTracker{}, nil, fakePolicy{}, &fakeAudit{})
+	svc := newSvc(b, &fakeTracker{}, fakePolicy{}, &fakeAudit{})
 
 	rec, err := svc.Capture(context.Background(), CaptureInput{
 		Context:  baseCtx(),
@@ -197,7 +182,7 @@ func TestCaptureValidationFailClosed(t *testing.T) {
 	b := &fakeBrain{}
 	tr := &fakeTracker{}
 	au := &fakeAudit{}
-	svc := newSvc(b, tr, nil, fakePolicy{}, au)
+	svc := newSvc(b, tr, fakePolicy{}, au)
 
 	_, err := svc.Capture(context.Background(), CaptureInput{
 		Context: baseCtx(),
@@ -216,7 +201,7 @@ func TestCaptureValidationFailClosed(t *testing.T) {
 }
 
 func TestCaptureValidationRejectsBadTicket(t *testing.T) {
-	svc := newSvc(&fakeBrain{}, &fakeTracker{}, nil, fakePolicy{}, &fakeAudit{})
+	svc := newSvc(&fakeBrain{}, &fakeTracker{}, fakePolicy{}, &fakeAudit{})
 	_, err := svc.Capture(context.Background(), CaptureInput{
 		Context: baseCtx(),
 		Tickets: []Ticket{{Repo: "hyperguild", Action: "frobnicate"}}, // bad action
@@ -239,7 +224,7 @@ func TestCapturePartialFailureBestEffort(t *testing.T) {
 	}}
 	tr := &fakeTracker{}
 	au := &fakeAudit{}
-	svc := newSvc(b, tr, nil, fakePolicy{}, au)
+	svc := newSvc(b, tr, fakePolicy{}, au)
 
 	rec, err := svc.Capture(context.Background(), CaptureInput{
 		Context: baseCtx(),
@@ -264,7 +249,7 @@ func TestCaptureDryRunWritesNothing(t *testing.T) {
 	b := &fakeBrain{}
 	tr := &fakeTracker{}
 	au := &fakeAudit{}
-	svc := newSvc(b, tr, nil, fakePolicy{}, au)
+	svc := newSvc(b, tr, fakePolicy{}, au)
 
 	rec, err := svc.Capture(context.Background(), CaptureInput{
 		Context:  baseCtx(),
@@ -287,7 +272,7 @@ func TestCaptureStricterClassificationWins(t *testing.T) {
 	b := &fakeBrain{}
 	au := &fakeAudit{}
 	pol := fakePolicy{tags: map[string]classification.Level{"client-seb": classification.Confidential}}
-	svc := newSvc(b, &fakeTracker{}, nil, pol, au)
+	svc := newSvc(b, &fakeTracker{}, pol, au)
 
 	ctx := baseCtx()
 	ctx.Classification = "internal"
@@ -306,7 +291,7 @@ func TestCaptureCallerRaisingSensitivityHonoured(t *testing.T) {
 	// Caller declares confidential; target internal → effective confidential, NOT a security event.
 	au := &fakeAudit{}
 	pol := fakePolicy{tags: map[string]classification.Level{"hyperguild": classification.Internal}}
-	svc := newSvc(&fakeBrain{}, &fakeTracker{}, nil, pol, au)
+	svc := newSvc(&fakeBrain{}, &fakeTracker{}, pol, au)
 
 	ctx := baseCtx()
 	ctx.Classification = "confidential"
@@ -319,26 +304,6 @@ func TestCaptureCallerRaisingSensitivityHonoured(t *testing.T) {
 	assert.Empty(t, au.entries[0].SecurityEvents, "raising sensitivity is honoured, not flagged")
 }
 
-func TestCaptureSummaryPathAndFidelity(t *testing.T) {
-	sw := &fakeSummary{}
-	svc := newSvc(&fakeBrain{}, &fakeTracker{}, sw, fakePolicy{}, &fakeAudit{})
-
-	ctx := baseCtx()
-	ctx.Fidelity = "transcript-parse"
-	ctx.SessionRef = "abc123def456"
-	rec, err := svc.Capture(context.Background(), CaptureInput{
-		Context: ctx,
-		Summary: &Summary{Title: "Session Wrap", Body: "did stuff", ReposTouched: []string{"hyperguild"}},
-	})
-	require.NoError(t, err)
-	require.NotNil(t, rec.Summary)
-	assert.True(t, rec.Summary.OK)
-	require.Len(t, sw.paths, 1)
-	assert.True(t, strings.HasPrefix(sw.paths[0], "summaries/claude-code/2026-06/"), "path: %s", sw.paths[0])
-	assert.Contains(t, sw.paths[0], "session-wrap")
-	assert.Contains(t, sw.content[0], "fidelity: transcript-parse", "fidelity stamped in frontmatter")
-}
-
 // --- I1 sovereignty gate (#53) ---
 
 func TestCaptureRefusesConfidentialViaUSNexus(t *testing.T) {
@@ -346,7 +311,7 @@ func TestCaptureRefusesConfidentialViaUSNexus(t *testing.T) {
 	tr := &fakeTracker{}
 	au := &fakeAudit{}
 	pol := fakePolicy{tags: map[string]classification.Level{"client-seb": classification.Confidential}}
-	svc := newSvc(b, tr, nil, pol, au)
+	svc := newSvc(b, tr, pol, au)
 
 	ctx := baseCtx()
 	ctx.Classification = "confidential"
@@ -368,7 +333,7 @@ func TestCaptureRefusesConfidentialViaUSNexus(t *testing.T) {
 func TestCaptureAllowsConfidentialViaSovereign(t *testing.T) {
 	b := &fakeBrain{}
 	pol := fakePolicy{tags: map[string]classification.Level{"client-seb": classification.Confidential}}
-	svc := newSvc(b, &fakeTracker{}, nil, pol, &fakeAudit{})
+	svc := newSvc(b, &fakeTracker{}, pol, &fakeAudit{})
 
 	ctx := baseCtx()
 	ctx.Classification = "confidential"
@@ -387,7 +352,7 @@ func TestCaptureAssertedLabelIgnoredAndLogged(t *testing.T) {
 	// us-nexus; confidential ⇒ refused, and the discrepancy is a security event.
 	au := &fakeAudit{}
 	pol := fakePolicy{tags: map[string]classification.Level{"client-seb": classification.Confidential}}
-	svc := newSvc(&fakeBrain{}, &fakeTracker{}, nil, pol, au)
+	svc := newSvc(&fakeBrain{}, &fakeTracker{}, pol, au)
 
 	ctx := baseCtx()
 	ctx.Harness = "sovereign-soil" // asserted
@@ -407,7 +372,7 @@ func TestCaptureAssertedLabelIgnoredAndLogged(t *testing.T) {
 func TestCaptureInternalViaUSNexusAllowed(t *testing.T) {
 	// us-nexus origin is fine for non-confidential data.
 	b := &fakeBrain{}
-	svc := newSvc(b, &fakeTracker{}, nil, fakePolicy{}, &fakeAudit{})
+	svc := newSvc(b, &fakeTracker{}, fakePolicy{}, &fakeAudit{})
 	ctx := baseCtx()
 	ctx.Origin = ZoneUSNexus // internal classification, so gate doesn't fire
 	rec, err := svc.Capture(context.Background(), CaptureInput{
@@ -426,7 +391,7 @@ func TestCaptureRefusesWhenAuditReserveFails(t *testing.T) {
 	b := &fakeBrain{}
 	tr := &fakeTracker{}
 	au := &fakeAudit{reserveErr: errors.New("central sink unreachable")}
-	svc := newSvc(b, tr, nil, fakePolicy{}, au)
+	svc := newSvc(b, tr, fakePolicy{}, au)
 
 	_, err := svc.Capture(context.Background(), CaptureInput{
 		Context:  baseCtx(),
@@ -443,7 +408,7 @@ func TestCaptureFlagsLocallyBufferedAudit(t *testing.T) {
 	// proceeds and the receipt flags the degraded audit state.
 	b := &fakeBrain{}
 	au := &fakeAudit{reserveMode: AuditBuffered}
-	svc := newSvc(b, &fakeTracker{}, nil, fakePolicy{}, au)
+	svc := newSvc(b, &fakeTracker{}, fakePolicy{}, au)
 
 	rec, err := svc.Capture(context.Background(), CaptureInput{
 		Context:  baseCtx(),
@@ -458,7 +423,7 @@ func TestCaptureFlagsLocallyBufferedAudit(t *testing.T) {
 func TestCaptureDryRunSkipsAuditGate(t *testing.T) {
 	// dry_run must not even probe the audit sink (writes nothing anywhere).
 	au := &fakeAudit{reserveErr: errors.New("would refuse")}
-	svc := newSvc(&fakeBrain{}, &fakeTracker{}, nil, fakePolicy{}, au)
+	svc := newSvc(&fakeBrain{}, &fakeTracker{}, fakePolicy{}, au)
 
 	rec, err := svc.Capture(context.Background(), CaptureInput{
 		Context:  baseCtx(),