diff --git a/cmd/storage-migrate/integration_test.go b/cmd/storage-migrate/integration_test.go
index d4997c0..5fa87c9 100644
--- a/cmd/storage-migrate/integration_test.go
+++ b/cmd/storage-migrate/integration_test.go
@@ -9,8 +9,51 @@ import (
 	"testing"
 
 	"agent-system-backend/internal/store"
+	"agent-system-backend/pkg/extension"
 )
 
+func TestMigrateTrustedContextManifestWithoutRawScope(t *testing.T) {
+	target, cleanup := pgSchemaDSN(t)
+	defer cleanup()
+	fixture := buildFixture(t)
+	src, err := store.OpenSQLite(fixture)
+	if err != nil {
+		t.Fatal(err)
+	}
+	m := extension.ProjectContextManifest{ProjectID: "p1", AttemptID: "model-attempt", InputSHA256: "request-hash", Delivery: "attempted",
+		Included: []extension.ProjectContextManifestEntry{{SourceID: "source-a", Revision: "r1", SourceHash: "ha", InputSHA256: "input-hash"}}}
+	if err := src.AppendContextManifestWithScope("alice", "r1", m, store.ContextManifestScope{Bound: true}); err != nil {
+		t.Fatal(err)
+	}
+	m.Delivery = "responded"
+	if err := src.AppendContextManifestWithScope("alice", "r1", m, store.ContextManifestScope{Bound: true}); err != nil {
+		t.Fatal(err)
+	}
+	if err := src.Close(); err != nil {
+		t.Fatal(err)
+	}
+	snapshot := filepath.Join(t.TempDir(), "snapshot.db")
+	if err := cmdBackup([]string{"--source", fixture, "--out", snapshot}); err != nil {
+		t.Fatal(err)
+	}
+	if err := cmdMigrate([]string{"--source", snapshot, "--target", target, "--migration-id", "context-copy"}); err != nil {
+		t.Fatal(err)
+	}
+	pg, err := store.OpenPostgres(target, filepath.Join(t.TempDir(), "artifacts"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer pg.Close()
+	receipts, err := pg.ListContextManifests("alice", "r1")
+	if err != nil || len(receipts) != 2 || len(receipts[1].Included) != 1 || receipts[1].Included[0].SourceID != "source-a" {
+		t.Fatalf("content-free model receipts not copied: count=%d err=%v", len(receipts), err)
+	}
+	var rawColumns int
+	if err := pg.DB().QueryRow(`SELECT COUNT(*) FROM information_schema.columns WHERE table_schema=current_schema() AND table_name='context_manifests' AND column_name IN ('resolve_goal','resolve_target_id')`).Scan(&rawColumns); err != nil || rawColumns != 0 {
+		t.Fatalf("migrated PG schema has raw prompt columns: count=%d err=%v", rawColumns, err)
+	}
+}
+
 // U4 集成（环境门控 AGENT_PG_TEST_DSN：CI test-pg job / 本机隔离实例）：
 // 夹具 → 受管迁移 → 校验和验证 → 幂等重跑 → 断点续传 → 非空目标拒绝 →
 // 未知 owner 阻塞。每用例独立 PG schema（与 store 测试同隔离约定）。
diff --git a/cmd/storage-migrate/main.go b/cmd/storage-migrate/main.go
index 92de9f2..93d9463 100644
--- a/cmd/storage-migrate/main.go
+++ b/cmd/storage-migrate/main.go
@@ -242,6 +242,9 @@ func cmdBackup(args []string) error {
 		return err
 	}
 	defer db.Close()
+	if err := refuseCandidateRawContextScope(db); err != nil {
+		return err
+	}
 	if _, err := db.Exec(`VACUUM INTO ?`, *out); err != nil {
 		return fmt.Errorf("vacuum into: %w", err)
 	}
@@ -336,6 +339,9 @@ func cmdMigrate(args []string) error {
 		return err
 	}
 	defer src.Close()
+	if err := refuseCandidateRawContextScope(src); err != nil {
+		return err
+	}
 	snapID, _, err := fileSHA256(*source)
 	if err != nil {
 		return err
@@ -410,6 +416,23 @@ func cmdMigrate(args []string) error {
 	return writeReport(rep, *out)
 }
 
+// Candidate W6 v34 may contain full model prompts in private scope columns.
+// Never copy or back up such a source implicitly; it must be migrated and
+// reviewed in an isolated Backend store before this tool accepts it.
+func refuseCandidateRawContextScope(db *sql.DB) error {
+	if !sqliteHasTable(db, "context_manifests") {
+		return nil
+	}
+	var columns int
+	if err := db.QueryRow(`SELECT COUNT(*) FROM pragma_table_info('context_manifests') WHERE name IN ('resolve_goal','resolve_target_id')`).Scan(&columns); err != nil {
+		return err
+	}
+	if columns > 0 {
+		return fmt.Errorf("candidate context scope text columns remain; isolate and scrub source before backup or migration")
+	}
+	return nil
+}
+
 // guardIdentity：目标非空且身份不同即拒绝（R7：不覆盖他人数据）。
 //   - 存在其他 migration_id 的完成记录 → 拒绝；
 //   - 同 migration_id 但 source_snapshot_id 不同（换了快照续传）→ 拒绝；
diff --git a/cmd/storage-migrate/main_test.go b/cmd/storage-migrate/main_test.go
index 8731e0e..24b9170 100644
--- a/cmd/storage-migrate/main_test.go
+++ b/cmd/storage-migrate/main_test.go
@@ -1,7 +1,10 @@
 package main
 
 import (
+	"bytes"
+	"database/sql"
 	"encoding/json"
+	"os"
 	"path/filepath"
 	"strings"
 	"testing"
@@ -195,3 +198,53 @@ func TestCopyOrderCoversAllFixtureTables(t *testing.T) {
 		t.Fatalf("copyOrder 漏表（新表加入 schema 后须同步工具清单）：%v", missing)
 	}
 }
+
+func TestBackupAndMigrateRejectCandidateRawContextScope(t *testing.T) {
+	path := buildFixture(t)
+	db, err := sql.Open("sqlite", path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := db.Exec(`ALTER TABLE context_manifests ADD COLUMN resolve_goal TEXT NOT NULL DEFAULT ''`); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := db.Exec(`ALTER TABLE context_manifests ADD COLUMN resolve_target_id TEXT NOT NULL DEFAULT ''`); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := db.Exec(`DELETE FROM schema_migrations WHERE version=35`); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := db.Exec(`INSERT INTO context_manifests(id,attempt_id,owner,target_id,project_id,input_sha256,delivery,manifest_json,created_at,scope_bound,resolve_goal,resolve_target_id) VALUES('candidate-ctx','candidate-attempt','alice','r1','p1','input-hash','attempted','{}','2026-10-14T00:00:00Z',1,'OLD_RESTRICTED_BODY','doc-private')`); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Close(); err != nil {
+		t.Fatal(err)
+	}
+	out := filepath.Join(t.TempDir(), "unsafe-backup.db")
+	if err := cmdBackup([]string{"--source", path, "--out", out}); err == nil || !strings.Contains(err.Error(), "candidate context scope text") {
+		t.Fatalf("backup accepted candidate v34 raw scope: %v", err)
+	}
+	if _, err := os.Stat(out); !os.IsNotExist(err) {
+		t.Fatalf("rejected backup still created output: %v", err)
+	}
+	if err := cmdMigrate([]string{"--source", path, "--target", "postgres://invalid", "--migration-id", "unsafe"}); err == nil || !strings.Contains(err.Error(), "candidate context scope text") {
+		t.Fatalf("migration accepted candidate v34 raw source: %v", err)
+	}
+	scrubbed, err := store.OpenSQLite(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := scrubbed.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := cmdBackup([]string{"--source", path, "--out", out}); err != nil {
+		t.Fatalf("scrubbed source rejected: %v", err)
+	}
+	data, err := os.ReadFile(out)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if bytes.Contains(data, []byte("OLD_RESTRICTED_BODY")) {
+		t.Fatal("backup retained candidate raw scope body")
+	}
+}
diff --git a/internal/app/app.go b/internal/app/app.go
index 0f9a111..af7521e 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -620,6 +620,7 @@ func Run(opt Options) error {
 	if contextSlot.active() {
 		mgr.SetProjectContextResolver(contextSlot.resolve)
 		mgr.SetProjectEvidenceReader(contextSlot.readEvidence)
+		mgr.SetProjectContextSourceRechecker(contextSlot.recheck)
 	}
 	mgr.SetKnowledgeProjectScope(func(ctx context.Context, actor string, id core.ID) (core.ID, error) {
 		return projectSlot.resolve(ctx, caps, actor, id)
diff --git a/internal/app/project_context.go b/internal/app/project_context.go
index fb056d3..1f1aeeb 100644
--- a/internal/app/project_context.go
+++ b/internal/app/project_context.go
@@ -118,6 +118,33 @@ func (s *projectContextSlot) readEvidence(ctx context.Context, req extension.Pro
 	return evidence, nil
 }
 
+func (s *projectContextSlot) recheck(ctx context.Context, req extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error) {
+	if s == nil || req.Scope.Actor == "" || req.Scope.ProjectID == "" || req.Scope.Goal != "" {
+		return extension.ProjectContextSourceRecheckResult{}, errors.New("extension: trusted source recheck scope missing")
+	}
+	s.mu.RLock()
+	p, holder := s.provider, s.holder
+	s.mu.RUnlock()
+	rechecker, ok := p.(extension.ProjectContextSourceRechecker)
+	if !ok {
+		return extension.ProjectContextSourceRecheckResult{}, errors.New("extension: project source rechecker unavailable")
+	}
+	req.Scope.PluginID = holder
+	bounded, cancel := context.WithTimeout(ctx, 3*time.Second)
+	defer cancel()
+	result, err := rechecker.Recheck(bounded, req)
+	if err != nil {
+		return extension.ProjectContextSourceRecheckResult{}, err
+	}
+	if err := bounded.Err(); err != nil {
+		return extension.ProjectContextSourceRecheckResult{}, err
+	}
+	if result.Bundle.ProjectID != req.Scope.ProjectID || result.Bundle.Status != extension.ProjectContextReady {
+		return extension.ProjectContextSourceRecheckResult{}, errors.New("extension: project sources no longer authorized")
+	}
+	return result, nil
+}
+
 const workContextBudgetChars = 12000
 
 // TaskCreateForWork fixes the project binding while the authenticated command
diff --git a/internal/app/project_context_test.go b/internal/app/project_context_test.go
index 4b40b36..0725ff8 100644
--- a/internal/app/project_context_test.go
+++ b/internal/app/project_context_test.go
@@ -22,6 +22,46 @@ type testProjectContextProvider struct {
 	read    func(extension.ProjectEvidenceRequest) (extension.ProjectEvidence, error)
 }
 
+type testSourceRecheckProvider struct {
+	testProjectContextProvider
+	called *bool
+}
+
+func (p testSourceRecheckProvider) Recheck(ctx context.Context, req extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error) {
+	if _, ok := ctx.Deadline(); !ok || req.Scope.PluginID != "rdm" || req.Scope.Actor != "alice" || req.Scope.ProjectID != "p1" || req.Scope.Goal != "" {
+		return extension.ProjectContextSourceRecheckResult{}, fmt.Errorf("untrusted or unbounded recheck scope")
+	}
+	*p.called = true
+	return extension.ProjectContextSourceRecheckResult{Bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.Scope.ProjectID}}, nil
+}
+
+func TestProjectSourceRecheckUsesSameRegisteredProviderAndDeadline(t *testing.T) {
+	called := false
+	slot := &projectContextSlot{}
+	provider := testSourceRecheckProvider{called: &called}
+	if err := (pluginRegistry{pluginID: "rdm", caps: hostcaps{contexts: slot}}).RegisterProjectContextProvider(provider); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := slot.recheck(context.Background(), extension.ProjectContextSourceRecheckRequest{Scope: extension.ProjectContextRequest{Actor: "alice", ProjectID: "p1"}}); err != nil || !called {
+		t.Fatalf("registered source rechecker unavailable: called=%v err=%v", called, err)
+	}
+	if _, err := slot.recheck(context.Background(), extension.ProjectContextSourceRecheckRequest{Scope: extension.ProjectContextRequest{Actor: "alice", ProjectID: "p1", Goal: "OLD_RESTRICTED_BODY"}}); err == nil {
+		t.Fatal("raw Goal entered source recheck provider")
+	}
+	cancelled, cancel := context.WithCancel(context.Background())
+	cancel()
+	if _, err := slot.recheck(cancelled, extension.ProjectContextSourceRecheckRequest{Scope: extension.ProjectContextRequest{Actor: "alice", ProjectID: "p1"}}); err == nil {
+		t.Fatal("cancelled source recheck returned authorized context")
+	}
+	legacy := &projectContextSlot{}
+	if err := (pluginRegistry{pluginID: "rdm", caps: hostcaps{contexts: legacy}}).RegisterProjectContextProvider(testProjectContextProvider{}); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := legacy.recheck(context.Background(), extension.ProjectContextSourceRecheckRequest{Scope: extension.ProjectContextRequest{Actor: "alice", ProjectID: "p1"}}); err == nil {
+		t.Fatal("provider without optional rechecker silently accepted old sources")
+	}
+}
+
 type deadlineContextProvider struct{ sawDeadline *bool }
 
 func (p deadlineContextProvider) Resolve(ctx context.Context, req extension.ProjectContextRequest) (extension.ProjectContextBundle, error) {
@@ -266,8 +306,8 @@ func TestCompleteForWorkUsesStoredScopeAndActualInputManifest(t *testing.T) {
 
 func TestWorkContextBudgetKeepsRequiredEvidenceFirst(t *testing.T) {
 	bundle := extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", Items: []extension.ProjectContextItem{
-		{SourceID: "optional", Text: "12345678"},
-		{SourceID: "required", Text: "must keep", Required: true},
+		{SourceID: "optional", Revision: "r1", Hash: "h1", Text: "12345678"},
+		{SourceID: "required", Revision: "r1", Hash: "h2", Text: "must keep", Required: true},
 	}}
 	prompt, manifest, err := assembleWorkCompletion("goal", bundle, 140)
 	if err != nil {
diff --git a/internal/projectcontext/context.go b/internal/projectcontext/context.go
index a8b47d2..255c799 100644
--- a/internal/projectcontext/context.go
+++ b/internal/projectcontext/context.go
@@ -27,10 +27,16 @@ func Assemble(bundle extension.ProjectContextBundle, budget int) (string, extens
 	missingRequired := false
 	appendItem := func(item extension.ProjectContextItem) {
 		entry := extension.ProjectContextManifestEntry{SourceID: item.SourceID, Revision: item.Revision, SourceHash: item.Hash}
+		if item.SourceID == "" || item.Revision == "" || item.Hash == "" {
+			entry.Reason = "unverifiable-source"
+			m.Dropped = append(m.Dropped, entry)
+			missingRequired = missingRequired || item.Required
+			return
+		}
 		runes := []rune(item.Text)
 		label := "\n[Source " + item.SourceID + " revision " + item.Revision + "]\n"
 		cost := len(runes) + len([]rune(label))
-		if cost > remaining || item.SourceID == "" {
+		if cost > remaining {
 			entry.Reason = "over-budget-or-missing-source"
 			m.Dropped = append(m.Dropped, entry)
 			missingRequired = missingRequired || item.Required
@@ -66,7 +72,7 @@ func Assemble(bundle extension.ProjectContextBundle, budget int) (string, extens
 		}
 	}
 	for _, ref := range bundle.Evidence {
-		if ref.ID == "" || ref.SourceID == "" {
+		if ref.ID == "" || ref.SourceID == "" || ref.Revision == "" || ref.Hash == "" {
 			continue
 		}
 		line := fmt.Sprintf("\n[Evidence ref %q source %q revision %q]\n", ref.ID, ref.SourceID, ref.Revision)
diff --git a/internal/projectcontext/context_test.go b/internal/projectcontext/context_test.go
index bf26a3a..abaeda3 100644
--- a/internal/projectcontext/context_test.go
+++ b/internal/projectcontext/context_test.go
@@ -8,7 +8,7 @@ import (
 )
 
 func TestAssembleOffersOnlyBudgetedEvidenceReferences(t *testing.T) {
-	bundle := extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Evidence: []extension.ProjectEvidenceRef{{ID: "ref-1", SourceID: "doc-1", Revision: "r2"}, {ID: strings.Repeat("x", 1000), SourceID: "doc-2"}}}
+	bundle := extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Evidence: []extension.ProjectEvidenceRef{{ID: "ref-1", SourceID: "doc-1", Revision: "r2", Hash: "h1"}, {ID: strings.Repeat("x", 1000), SourceID: "doc-2", Revision: "r2", Hash: "h2"}}}
 	text, manifest, err := Assemble(bundle, 180)
 	if err != nil {
 		t.Fatal(err)
@@ -19,7 +19,7 @@ func TestAssembleOffersOnlyBudgetedEvidenceReferences(t *testing.T) {
 }
 
 func TestValidateCurrentRejectsWithdrawnOfferedReference(t *testing.T) {
-	ref := extension.ProjectEvidenceRef{ID: "ref-1", SourceID: "doc-1", Revision: "r2"}
+	ref := extension.ProjectEvidenceRef{ID: "ref-1", SourceID: "doc-1", Revision: "r2", Hash: "h1"}
 	old := extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Evidence: []extension.ProjectEvidenceRef{ref}}
 	_, manifest, err := Assemble(old, 180)
 	if err != nil {
@@ -41,3 +41,10 @@ func TestAssembleIncludesUnresolvedMissingStatus(t *testing.T) {
 		t.Fatalf("missing status hidden from model or receipt: text=%q manifest=%+v", text, manifest)
 	}
 }
+
+func TestAssembleRejectsRequiredSourceWithoutStableRevisionAndHash(t *testing.T) {
+	bundle := extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Items: []extension.ProjectContextItem{{SourceID: "legacy", Text: "private", Required: true}}}
+	if _, _, err := Assemble(bundle, 900); err == nil {
+		t.Fatal("legacy source without revision/hash entered recoverable project model input")
+	}
+}
diff --git a/internal/runmgr/project_context.go b/internal/runmgr/project_context.go
index 763eb84..11c02b8 100644
--- a/internal/runmgr/project_context.go
+++ b/internal/runmgr/project_context.go
@@ -5,6 +5,7 @@ import (
 	"crypto/sha256"
 	"errors"
 	"fmt"
+	"slices"
 	"strings"
 	"time"
 
@@ -26,6 +27,10 @@ func (m *Manager) SetProjectEvidenceReader(fn func(context.Context, extension.Pr
 	m.projectEvidenceReader = fn
 }
 
+func (m *Manager) SetProjectContextSourceRechecker(fn func(context.Context, extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error)) {
+	m.projectSourceRechecker = fn
+}
+
 func (c *runCtx) ProjectContextEnabled() bool {
 	return c.run.ProjectID != "" && c.mgr.projectContextResolver != nil
 }
@@ -44,12 +49,114 @@ func (c *runCtx) ValidateProjectCrossGuard(ctx context.Context, current extensio
 	if err != nil {
 		return err
 	}
+	terminal := map[string]string{}
 	for _, m := range prior {
+		if m.Delivery == "responded" || m.Delivery == "unknown" {
+			terminal[m.AttemptID] = m.Delivery
+		}
+	}
+	for _, m := range prior {
+		if m.Delivery == "attempted" {
+			if terminal[m.AttemptID] != "responded" {
+				return errors.New("prior project model attempt has no trusted response")
+			}
+			continue
+		}
+		if m.Delivery != "responded" {
+			return errors.New("prior project model delivery is unknown")
+		}
 		if m.ProjectID != current.ProjectID || m.AuthorizationEpoch == "" || m.PublicationEpoch == "" ||
 			current.AuthorizationEpoch == "" || current.PublicationEpoch == "" ||
 			m.AuthorizationEpoch != current.AuthorizationEpoch || m.PublicationEpoch != current.PublicationEpoch || m.Watermark != current.Watermark {
 			return errors.New("prior project model work used a different authorization or publication revision")
 		}
+		if err := c.recheckManifest(ctx, m, ""); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// recheckManifest reauthorizes the exact source identities that were actually
+// present in a prior model request. It never persists or reconstructs a Goal.
+func (c *runCtx) recheckManifest(ctx context.Context, m extension.ProjectContextManifest, stepID string) error {
+	if m.Delivery != "responded" || c.mgr.projectSourceRechecker == nil {
+		return errors.New("project source recheck unavailable")
+	}
+	if m.BudgetChars <= 0 || len(m.Included)+len(m.OfferedReferences)+len(m.ReadEvidence) == 0 {
+		return errors.New("prior project model input has no stable source")
+	}
+	for _, entry := range m.Included {
+		if entry.SourceID == "" || entry.Revision == "" || entry.SourceHash == "" || entry.InputSHA256 == "" {
+			return errors.New("prior project model input has incomplete source identity")
+		}
+	}
+	for _, ref := range m.OfferedReferences {
+		if ref.ID == "" || ref.SourceID == "" || ref.Revision == "" || ref.Hash == "" {
+			return errors.New("prior project evidence reference is incomplete")
+		}
+	}
+	scope, err := c.trustedProjectContextRequest(ctx, m.BudgetChars)
+	if err != nil {
+		return err
+	}
+	scope.StepID = core.ID(stepID)
+	result, err := c.mgr.projectSourceRechecker(ctx, extension.ProjectContextSourceRecheckRequest{
+		Scope: scope, Included: append([]extension.ProjectContextManifestEntry(nil), m.Included...),
+		OfferedReferences: append([]extension.ProjectEvidenceRef(nil), m.OfferedReferences...),
+		ReadEvidence:      append([]extension.ProjectContextManifestEntry(nil), m.ReadEvidence...),
+	})
+	if err != nil {
+		return err
+	}
+	current := result.Bundle
+	expectedRefs := map[string]extension.ProjectEvidenceRef{}
+	for _, ref := range m.OfferedReferences {
+		expectedRefs[ref.ID] = ref
+	}
+	for _, used := range m.ReadEvidence {
+		ref := extension.ProjectEvidenceRef{ID: used.ReferenceID, SourceID: used.SourceID, Revision: used.Revision, Hash: used.SourceHash}
+		if ref.ID == "" || ref.SourceID == "" || ref.Revision == "" || ref.Hash == "" {
+			return errors.New("read project evidence lacks stable reference")
+		}
+		if existing, ok := expectedRefs[ref.ID]; ok && existing != ref {
+			return errors.New("project evidence reference identity changed")
+		}
+		expectedRefs[ref.ID] = ref
+	}
+	if len(current.Items) != len(m.Included) || len(current.Evidence) != len(expectedRefs) || !slices.Equal(current.Missing, m.Missing) {
+		return errors.New("project source recheck returned an incomplete source set")
+	}
+	seenRefs := map[string]bool{}
+	for _, ref := range current.Evidence {
+		if ref != expectedRefs[ref.ID] || seenRefs[ref.ID] {
+			return errors.New("project source recheck returned an unrelated evidence reference")
+		}
+		seenRefs[ref.ID] = true
+	}
+	if err := projectcontext.ValidateCurrent(m, current); err != nil {
+		return err
+	}
+	for _, used := range m.ReadEvidence {
+		if used.ReferenceID == "" || used.InputSHA256 == "" || c.mgr.projectEvidenceReader == nil {
+			return errors.New("project evidence recheck unavailable")
+		}
+		matched := false
+		for _, ref := range current.Evidence {
+			if ref.ID != used.ReferenceID || ref.SourceID != used.SourceID || ref.Revision != used.Revision || ref.Hash != used.SourceHash {
+				continue
+			}
+			readScope := scope
+			readScope.BudgetChars = 8000
+			now, err := c.mgr.projectEvidenceReader(ctx, extension.ProjectEvidenceRequest{Scope: readScope, Reference: ref})
+			if err == nil && now.Reference == ref && fmt.Sprintf("%x", sha256.Sum256([]byte(now.Text))) == used.InputSHA256 {
+				matched = true
+			}
+			break
+		}
+		if !matched {
+			return errors.New("project evidence permission or content changed")
+		}
 	}
 	return nil
 }
@@ -135,41 +242,50 @@ func (c *runCtx) ProjectContext(ctx context.Context, goal string, budget int) (e
 	if c.run.ProjectID == "" || c.mgr.projectContextResolver == nil {
 		return extension.ProjectContextBundle{}, false, nil
 	}
-	if c.mgr.projectWorkAuthorization == nil {
-		return extension.ProjectContextBundle{}, true, errors.New("project work authorization missing")
-	}
-	run, err := c.mgr.st.GetRunByID(string(c.run.ID))
+	req, err := c.trustedProjectContextRequest(ctx, budget)
 	if err != nil {
 		return extension.ProjectContextBundle{}, true, err
 	}
-	if run.Owner == "" || run.Owner != c.run.Owner || run.ProjectID != c.run.ProjectID || run.ConversationID != c.run.ConversationID {
-		return extension.ProjectContextBundle{}, true, errors.New("persisted run scope mismatch")
-	}
-	conv, err := c.mgr.st.GetConversation(string(run.Owner), string(run.ConversationID))
-	if err != nil {
-		return extension.ProjectContextBundle{}, true, err
-	}
-	if conv.ProjectID != run.ProjectID {
-		return extension.ProjectContextBundle{}, true, errors.New("persisted conversation scope mismatch")
-	}
-	if err := c.mgr.authorizeProjectWork(ctx, string(run.Owner), run.ProjectID); err != nil {
-		return extension.ProjectContextBundle{}, true, err
-	}
-	req := extension.ProjectContextRequest{
-		Actor: string(run.Owner), ProjectID: run.ProjectID, ConversationID: run.ConversationID,
-		RunID: run.ID, Goal: goal, BudgetChars: budget,
-	}
+	req.Goal = goal
 	bundle, err := c.mgr.projectContextResolver(ctx, req)
 	if err != nil {
 		return extension.ProjectContextBundle{}, true, err
 	}
-	if bundle.ProjectID != run.ProjectID || bundle.Status != extension.ProjectContextReady {
+	if bundle.ProjectID != req.ProjectID || bundle.Status != extension.ProjectContextReady {
 		return extension.ProjectContextBundle{}, true, errors.New("project context unavailable for trusted run")
 	}
 	c.setContextRequest(req)
 	return bundle, true, nil
 }
 
+func (c *runCtx) trustedProjectContextRequest(ctx context.Context, budget int) (extension.ProjectContextRequest, error) {
+	if c.mgr.projectWorkAuthorization == nil {
+		return extension.ProjectContextRequest{}, errors.New("project work authorization missing")
+	}
+	run, err := c.mgr.st.GetRunByID(string(c.run.ID))
+	if err != nil {
+		return extension.ProjectContextRequest{}, err
+	}
+	if run.Owner == "" || run.Owner != c.run.Owner || run.ProjectID != c.run.ProjectID || run.ConversationID != c.run.ConversationID {
+		return extension.ProjectContextRequest{}, errors.New("persisted run scope mismatch")
+	}
+	conv, err := c.mgr.st.GetConversation(string(run.Owner), string(run.ConversationID))
+	if err != nil {
+		return extension.ProjectContextRequest{}, err
+	}
+	if conv.ProjectID != run.ProjectID {
+		return extension.ProjectContextRequest{}, errors.New("persisted conversation scope mismatch")
+	}
+	if err := c.mgr.authorizeProjectWork(ctx, string(run.Owner), run.ProjectID); err != nil {
+		return extension.ProjectContextRequest{}, err
+	}
+	req := extension.ProjectContextRequest{
+		Actor: string(run.Owner), ProjectID: run.ProjectID, ConversationID: run.ConversationID,
+		RunID: run.ID, BudgetChars: budget,
+	}
+	return req, nil
+}
+
 // SaveContextManifest persists a receipt for the exact request prepared by the
 // runtime. It does not store model-visible text or candidate-only references.
 func (c *runCtx) SaveContextManifest(ctx context.Context, m extension.ProjectContextManifest) error {
@@ -258,7 +374,7 @@ func (c *runCtx) SaveContextManifest(ctx context.Context, m extension.ProjectCon
 	}
 	if scopeBound {
 		return c.mgr.st.AppendContextManifestWithScope(string(run.Owner), string(run.ID), m,
-			store.ContextManifestScope{Goal: resolveGoal, TargetID: resolveTarget, Bound: true})
+			store.ContextManifestScope{Bound: true})
 	}
 	return c.mgr.st.AppendContextManifest(string(run.Owner), string(run.ID), m)
 }
@@ -309,8 +425,8 @@ func (c *runCtx) VerifyProjectStepOutput(ctx context.Context, stepID, stepAttemp
 	}
 	matchedBound := false
 	for _, source := range receipts {
-		receipt, selector := source.Manifest, source.Scope
-		if !selector.Bound || selector.TargetID != "" || receipt.ProjectID != c.run.ProjectID ||
+		receipt := source.Manifest
+		if !source.Scope.Bound || receipt.ProjectID != c.run.ProjectID ||
 			receipt.WorkflowStepAttemptID != stepAttemptID || receipt.AuthorizationEpoch != bound.AuthorizationEpoch ||
 			receipt.PublicationEpoch != bound.PublicationEpoch || receipt.Watermark != bound.Watermark || receipt.Version != bound.Version {
 			return errors.New("project workflow output lost its trusted model source")
@@ -318,35 +434,9 @@ func (c *runCtx) VerifyProjectStepOutput(ctx context.Context, stepID, stepAttemp
 		if receipt.AttemptID == bound.AttemptID {
 			matchedBound = true
 		}
-		current, active, err := c.ProjectContext(ctx, selector.Goal, receipt.BudgetChars)
-		if err != nil || !active || current.ProjectID != receipt.ProjectID ||
-			current.AuthorizationEpoch != receipt.AuthorizationEpoch || current.PublicationEpoch != receipt.PublicationEpoch || current.Watermark != receipt.Watermark {
-			return errors.New("project workflow output authorization or publication changed")
-		}
-		if err := projectcontext.ValidateCurrent(receipt, current); err != nil {
+		if err := c.recheckManifest(ctx, receipt, stepID); err != nil {
 			return fmt.Errorf("project workflow output source changed: %w", err)
 		}
-		for _, used := range receipt.ReadEvidence {
-			if c.mgr.projectEvidenceReader == nil {
-				return errors.New("project workflow evidence reader unavailable")
-			}
-			matched := false
-			for _, ref := range current.Evidence {
-				if ref.ID != used.ReferenceID || ref.SourceID != used.SourceID || ref.Revision != used.Revision || ref.Hash != used.SourceHash {
-					continue
-				}
-				scope := extension.ProjectContextRequest{Actor: string(c.run.Owner), ProjectID: c.run.ProjectID,
-					ConversationID: c.run.ConversationID, RunID: c.run.ID, Goal: selector.Goal, TargetID: selector.TargetID, BudgetChars: 8000}
-				now, err := c.mgr.projectEvidenceReader(ctx, extension.ProjectEvidenceRequest{Scope: scope, Reference: ref})
-				if err == nil && now.Reference == ref && fmt.Sprintf("%x", sha256.Sum256([]byte(now.Text))) == used.InputSHA256 {
-					matched = true
-				}
-				break
-			}
-			if !matched {
-				return errors.New("project workflow evidence permission or content changed")
-			}
-		}
 	}
 	if !matchedBound {
 		return errors.New("project workflow output binding lost its responded model attempt")
diff --git a/internal/runmgr/project_context_test.go b/internal/runmgr/project_context_test.go
index 290802f..3e7b938 100644
--- a/internal/runmgr/project_context_test.go
+++ b/internal/runmgr/project_context_test.go
@@ -2,6 +2,7 @@ package runmgr
 
 import (
 	"context"
+	"crypto/sha256"
 	"fmt"
 	"os"
 	"strings"
@@ -19,6 +20,69 @@ import (
 	core "agent-system-core"
 )
 
+func TestProjectSourceRecheckVerifiesIncludedRefsAndEvidenceBody(t *testing.T) {
+	st := openRecoveryStore(t)
+	mgr := newRecoveryManager(t, st)
+	conv := recoveryConversation(t, st)
+	run := recoveryRun(t, st, conv, core.RunPending)
+	mgr.SetProjectWorkAuthorization(func(context.Context, string, core.ID) (bool, error) { return true, nil })
+	item := extension.ProjectContextItem{SourceID: "source-a", Revision: "r1", Hash: "ha", Text: "AUTHORIZED_A", Required: true}
+	ref := extension.ProjectEvidenceRef{ID: "ref-a", SourceID: "doc-a", Revision: "r1", Hash: "hd"}
+	bundle := extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: run.ProjectID, Version: "v1", Watermark: "w1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{item}, Evidence: []extension.ProjectEvidenceRef{ref}}
+	_, receipt, err := projectcontext.Assemble(bundle, 900)
+	if err != nil {
+		t.Fatal(err)
+	}
+	receipt.Delivery = "responded"
+	receipt.ReadEvidence = []extension.ProjectContextManifestEntry{{ReferenceID: ref.ID, SourceID: ref.SourceID, Revision: ref.Revision, SourceHash: ref.Hash, InputSHA256: fmt.Sprintf("%x", sha256.Sum256([]byte("DETAIL_A")))}}
+	rc := &runCtx{mgr: mgr, run: run, ctx: context.Background()}
+	current := bundle
+	readBody := "DETAIL_A"
+	offeredCount := 1
+	mgr.SetProjectContextSourceRechecker(func(_ context.Context, req extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error) {
+		if req.Scope.Actor != string(run.Owner) || req.Scope.ProjectID != run.ProjectID || req.Scope.RunID != run.ID || req.Scope.ConversationID != run.ConversationID || req.Scope.StepID != "draft" || req.Scope.Goal != "" || len(req.Included) != 1 || len(req.OfferedReferences) != offeredCount || len(req.ReadEvidence) != 1 {
+			return extension.ProjectContextSourceRecheckResult{}, fmt.Errorf("source recheck lost trusted run scope or actual input refs")
+		}
+		return extension.ProjectContextSourceRecheckResult{Bundle: current}, nil
+	})
+	mgr.SetProjectEvidenceReader(func(_ context.Context, req extension.ProjectEvidenceRequest) (extension.ProjectEvidence, error) {
+		if req.Scope.Actor != string(run.Owner) || req.Scope.RunID != run.ID || req.Scope.StepID != "draft" || req.Scope.Goal != "" || req.Reference != ref {
+			return extension.ProjectEvidence{}, fmt.Errorf("evidence read lost current trusted scope")
+		}
+		return extension.ProjectEvidence{Reference: req.Reference, Text: readBody}, nil
+	})
+	if err := rc.recheckManifest(context.Background(), receipt, "draft"); err != nil {
+		t.Fatalf("same authorized sources rejected: %v", err)
+	}
+	// A detailed body may be in the final request even when its reference was
+	// not offered in that request's short context. Recheck that exact read too.
+	receipt.OfferedReferences = nil
+	offeredCount = 0
+	if err := rc.recheckManifest(context.Background(), receipt, "draft"); err != nil {
+		t.Fatalf("read evidence not offered as a short ref was rejected: %v", err)
+	}
+	receipt.OfferedReferences = []extension.ProjectEvidenceRef{ref}
+	offeredCount = 1
+	current.Items = []extension.ProjectContextItem{{SourceID: item.SourceID, Revision: item.Revision, Hash: item.Hash, Text: "CHANGED", Required: true}}
+	if err := rc.recheckManifest(context.Background(), receipt, "draft"); err == nil {
+		t.Fatal("provider echoed old source hash but changed model-visible text")
+	}
+	current = bundle
+	current.Evidence = nil
+	if err := rc.recheckManifest(context.Background(), receipt, "draft"); err == nil {
+		t.Fatal("withdrawn offered reference accepted")
+	}
+	current = bundle
+	readBody = "REVOKED_DETAIL"
+	if err := rc.recheckManifest(context.Background(), receipt, "draft"); err == nil {
+		t.Fatal("changed ReadEvidence body accepted")
+	}
+	mgr.SetProjectContextSourceRechecker(nil)
+	if err := rc.recheckManifest(context.Background(), receipt, "draft"); err == nil {
+		t.Fatal("missing rechecker accepted old machine context")
+	}
+}
+
 func TestProjectContextUsesPersistedRunAndRefreshesAuthorization(t *testing.T) {
 	st := openRecoveryStore(t)
 	m := newRecoveryManager(t, st)
@@ -90,6 +154,10 @@ func TestProjectJudgeChecksPersistedSourceEpochAcrossGuards(t *testing.T) {
 	m.SetProjectContextResolver(func(_ context.Context, req extension.ProjectContextRequest) (extension.ProjectContextBundle, error) {
 		return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.ProjectID, AuthorizationEpoch: epoch, PublicationEpoch: publication, Watermark: "commit-1", Items: items}, nil
 	})
+	m.SetProjectContextSourceRechecker(func(_ context.Context, req extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error) {
+		return extension.ProjectContextSourceRecheckResult{Bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.Scope.ProjectID,
+			AuthorizationEpoch: epoch, PublicationEpoch: publication, Watermark: "commit-1", Items: items}}, nil
+	})
 	rc := &runCtx{mgr: m, run: run, ctx: context.Background()}
 	started := time.Now().Add(-time.Second)
 	bundle, _, err := rc.ProjectContext(context.Background(), "write output", 900)
@@ -182,6 +250,14 @@ func TestProjectJudgeRetainsGoalSensitiveSourceScope(t *testing.T) {
 		}
 		return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.ProjectID, AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Watermark: "w1", Items: []extension.ProjectContextItem{item}}, nil
 	})
+	m.SetProjectContextSourceRechecker(func(_ context.Context, req extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error) {
+		item := extension.ProjectContextItem{SourceID: "source-b", Revision: "r1", Hash: "hb", Text: "PUBLIC_B", Required: true}
+		if len(req.Included) == 1 && req.Included[0].SourceID == "source-a" && available {
+			item = extension.ProjectContextItem{SourceID: "source-a", Revision: "r1", Hash: "ha", Text: "AUTHORIZED_A", Required: true}
+		}
+		return extension.ProjectContextSourceRecheckResult{Bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.Scope.ProjectID,
+			AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Watermark: "w1", Items: []extension.ProjectContextItem{item}}}, nil
+	})
 	rc := &runCtx{mgr: m, run: run, ctx: context.Background()}
 	const goal = "draft report from approved source"
 	bundle, _, err := rc.ProjectContext(context.Background(), goal, 900)
@@ -238,10 +314,12 @@ func TestProjectJudgeRetainsGoalSensitiveSourceScope(t *testing.T) {
 type goalSensitiveStepBackend struct {
 	stream agentllm.StreamFunc
 	sent   string
+	calls  int
 }
 
 func (*goalSensitiveStepBackend) Name() string { return "goal-sensitive-test" }
 func (b *goalSensitiveStepBackend) Execute(ctx context.Context, req squad.ExecRequest) (*squad.ExecResult, error) {
+	b.calls++
 	for ev := range b.stream(ctx, "test-model", []agentllm.Message{{Role: agentllm.RoleUser, Content: req.Prompt}}, nil, agentllm.StreamOptions{}) {
 		if ev.Kind == agentllm.KindError {
 			return &squad.ExecResult{Success: false, ErrorReason: ev.Err.Error()}, nil
@@ -254,6 +332,52 @@ func (b *goalSensitiveStepBackend) Execute(ctx context.Context, req squad.ExecRe
 	return &squad.ExecResult{Success: true, Patches: map[string][]byte{"output.md": []byte("AUTHORIZED_A report\n")}}, nil
 }
 
+func TestCompiledWorkflowSecondPromptRejectsRevokedPriorOutput(t *testing.T) {
+	st := openRecoveryStore(t)
+	mgr := newRecoveryManager(t, st)
+	conv := recoveryConversation(t, st)
+	run := recoveryRun(t, st, conv, core.RunPending)
+	mgr.SetProjectWorkAuthorization(func(context.Context, string, core.ID) (bool, error) { return true, nil })
+	available := true
+	item := extension.ProjectContextItem{SourceID: "source-a", Revision: "r1", Hash: "ha", Text: "AUTHORIZED_A", Required: true}
+	mgr.SetProjectContextResolver(func(_ context.Context, req extension.ProjectContextRequest) (extension.ProjectContextBundle, error) {
+		items := []extension.ProjectContextItem{item}
+		if !available {
+			items = []extension.ProjectContextItem{{SourceID: "source-b", Revision: "r1", Hash: "hb", Text: "PUBLIC_B", Required: true}}
+		}
+		return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.ProjectID, AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Watermark: "w1", Items: items}, nil
+	})
+	rechecks := 0
+	mgr.SetProjectContextSourceRechecker(func(_ context.Context, req extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error) {
+		rechecks++
+		result := extension.ProjectContextSourceRecheckResult{Bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.Scope.ProjectID, AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Watermark: "w1", Items: []extension.ProjectContextItem{item}}}
+		if rechecks == 1 {
+			available = false
+		} else {
+			result.Bundle.Items = nil
+		}
+		return result, nil
+	})
+	rc := &runCtx{mgr: mgr, run: run, ctx: context.Background()}
+	base := func(_ context.Context, _ string, _ []agentllm.Message, _ []agentllm.ToolDecl, _ agentllm.StreamOptions) <-chan agentllm.Event {
+		ch := make(chan agentllm.Event, 1)
+		ch <- agentllm.Event{Kind: agentllm.KindMessageEnd, Message: agentllm.Message{Role: agentllm.RoleAssistant, Content: "done"}}
+		close(ch)
+		return ch
+	}
+	backend := &goalSensitiveStepBackend{stream: runtime.GuardProjectStream(rc, "", base)}
+	backends := squad.NewBackendResolver()
+	backends.RegisterInstance(backend.Name(), backend)
+	def := core.WorkflowDef{ID: "two-prompts", Title: "Two prompts", Steps: []core.WorkflowStep{
+		{ID: "draft", Title: "Draft", Kind: "prompt", Agent: "writer", Prompt: "draft report"},
+		{ID: "rewrite", Title: "Rewrite", Kind: "prompt", Agent: "writer", Prompt: "revise {{steps.draft.output}}"},
+	}}
+	_, err := wfcompile.RunCompiled(rc, wfcompile.Deps{DataDir: t.TempDir(), Backends: backends, DefaultBackend: backend.Name()}, workflow.Launch{Def: def}, workflow.Vars{Input: "draft"}, wfcompile.RunOptions{})
+	if err == nil || backend.calls != 1 || rechecks < 2 {
+		t.Fatalf("second prompt consumed revoked first output: err=%v calls=%d rechecks=%d", err, backend.calls, rechecks)
+	}
+}
+
 func TestCompiledWorkflowJudgeAcceptsGoalSensitiveProviderAndRejectsWithdrawal(t *testing.T) {
 	st := openRecoveryStore(t)
 	mgr := newRecoveryManager(t, st)
@@ -270,6 +394,14 @@ func TestCompiledWorkflowJudgeAcceptsGoalSensitiveProviderAndRejectsWithdrawal(t
 		}
 		return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.ProjectID, AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Watermark: "w1", Items: []extension.ProjectContextItem{item}}, nil
 	})
+	mgr.SetProjectContextSourceRechecker(func(_ context.Context, req extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error) {
+		item := extension.ProjectContextItem{SourceID: "source-b", Revision: "r1", Hash: "hb", Text: "PUBLIC_B", Required: true}
+		if len(req.Included) == 1 && req.Included[0].SourceID == "source-a" && available {
+			item = extension.ProjectContextItem{SourceID: "source-a", Revision: "r1", Hash: "ha", Text: "AUTHORIZED_A", Required: true}
+		}
+		return extension.ProjectContextSourceRecheckResult{Bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.Scope.ProjectID,
+			AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Watermark: "w1", Items: []extension.ProjectContextItem{item}}}, nil
+	})
 	rc := &runCtx{mgr: mgr, run: run, ctx: context.Background()}
 	stepBase := func(_ context.Context, _ string, messages []agentllm.Message, _ []agentllm.ToolDecl, _ agentllm.StreamOptions) <-chan agentllm.Event {
 		ch := make(chan agentllm.Event, 1)
@@ -298,6 +430,26 @@ func TestCompiledWorkflowJudgeAcceptsGoalSensitiveProviderAndRejectsWithdrawal(t
 	if err != nil || judgeCalls != 1 || backend.sent == "" {
 		t.Fatalf("authorized goal-sensitive workflow failed: err=%v judgeCalls=%d sent=%q resolved=%q", err, judgeCalls, backend.sent, resolved)
 	}
+	rows, err := st.DB().Query(`SELECT manifest_json FROM context_manifests WHERE owner=$1 AND target_id=$2`, string(run.Owner), string(run.ID))
+	if err != nil {
+		t.Fatal(err)
+	}
+	for rows.Next() {
+		var raw string
+		if err := rows.Scan(&raw); err != nil {
+			rows.Close()
+			t.Fatal(err)
+		}
+		if strings.Contains(raw, "AUTHORIZED_A report") || strings.Contains(raw, "draft report using") {
+			rows.Close()
+			t.Fatal("workflow model prompt or output body entered trusted receipt JSON")
+		}
+	}
+	if err := rows.Err(); err != nil {
+		rows.Close()
+		t.Fatal(err)
+	}
+	rows.Close()
 	bound, err := st.WorkflowStepSource(string(run.Owner), string(run.ID), "draft")
 	if err != nil {
 		t.Fatal(err)
@@ -337,7 +489,7 @@ func TestContextManifestRejectsDocumentDutyRevocationBeforeSend(t *testing.T) {
 	epoch := "duty-1"
 	m.SetProjectContextResolver(func(_ context.Context, req extension.ProjectContextRequest) (extension.ProjectContextBundle, error) {
 		return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.ProjectID, Version: "v1", AuthorizationEpoch: epoch,
-			Items: []extension.ProjectContextItem{{SourceID: "restricted-doc", Text: "private text", Required: true}}}, nil
+			Items: []extension.ProjectContextItem{{SourceID: "restricted-doc", Revision: "r1", Hash: "h1", Text: "private text", Required: true}}}, nil
 	})
 	rc := &runCtx{mgr: m, run: run, ctx: context.Background()}
 	bundle, active, err := rc.ProjectContext(context.Background(), "work", 900)
@@ -410,7 +562,7 @@ func TestConcurrentProjectEvidenceReadsKeepTrustedScope(t *testing.T) {
 	conv := recoveryConversation(t, st)
 	run := recoveryRun(t, st, conv, core.RunPending)
 	m.SetProjectWorkAuthorization(func(context.Context, string, core.ID) (bool, error) { return true, nil })
-	ref := extension.ProjectEvidenceRef{ID: "r1", SourceID: "doc", Revision: "v1"}
+	ref := extension.ProjectEvidenceRef{ID: "r1", SourceID: "doc", Revision: "v1", Hash: "h1"}
 	m.SetProjectContextResolver(func(_ context.Context, req extension.ProjectContextRequest) (extension.ProjectContextBundle, error) {
 		return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: req.ProjectID, Evidence: []extension.ProjectEvidenceRef{ref}}, nil
 	})
diff --git a/internal/runmgr/runmgr.go b/internal/runmgr/runmgr.go
index 1ed8485..fee313a 100644
--- a/internal/runmgr/runmgr.go
+++ b/internal/runmgr/runmgr.go
@@ -64,6 +64,7 @@ type Manager struct {
 	projectWorkAuthorization func(context.Context, string, core.ID) (bool, error)
 	projectContextResolver   func(context.Context, extension.ProjectContextRequest) (extension.ProjectContextBundle, error)
 	projectEvidenceReader    func(context.Context, extension.ProjectEvidenceRequest) (extension.ProjectEvidence, error)
+	projectSourceRechecker   func(context.Context, extension.ProjectContextSourceRecheckRequest) (extension.ProjectContextSourceRecheckResult, error)
 	// commands EXT-14：命令即工具的投影与分发源（nil = 未接线，命令不进工具清单）。
 	commands CommandSource
 	indexer  core.DocumentIndexer // 可选索引入口（nil = store 整文档单块）
diff --git a/internal/runtime/project_context_test.go b/internal/runtime/project_context_test.go
index 06299fe..0edb559 100644
--- a/internal/runtime/project_context_test.go
+++ b/internal/runtime/project_context_test.go
@@ -65,7 +65,7 @@ func TestProjectContextRefreshesPerModelRequestWithoutPersistingOldSummary(t *te
 		return base(ctx, model, msgs, tools, opts)
 	}}
 	c := &projectRunCtx{fakeRunCtx: &fakeRunCtx{ctx: context.Background(), sandbox: t.TempDir(), projectID: "project-1", prof: core.AgentProfile{Model: core.ModelRoute{Chat: "test-model"}}}}
-	c.bundle = extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", Version: "v1", Items: []extension.ProjectContextItem{{SourceID: "s1", Text: "summary-v1", Required: true}}}
+	c.bundle = extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", Version: "v1", Items: []extension.ProjectContextItem{{SourceID: "s1", Revision: "r1", Hash: "h1", Text: "summary-v1", Required: true}}}
 	if err := runner.Execute(c); err != nil {
 		t.Fatal(err)
 	}
@@ -110,7 +110,7 @@ func TestProjectRevocationScrubsOldMachineContextBeforeSecondTurn(t *testing.T)
 	base := scriptStream(turns, nil)
 	var requests [][]agentllm.Message
 	c := &projectRunCtx{fakeRunCtx: &fakeRunCtx{ctx: context.Background(), projectID: "p1", prof: core.AgentProfile{Model: core.ModelRoute{Chat: "test-model"}}, memEntries: []memEntry{{typ: "note", content: "STALE_MEMORY"}}, execOutput: old},
-		bundle:         extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Version: "v1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "doc", Text: old, Required: true}}},
+		bundle:         extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Version: "v1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "doc", Revision: "r1", Hash: "h1", Text: old, Required: true}}},
 		budgetSettings: core.EffectiveSettings{"models": map[string]any{"chat": map[string]any{"baseUrl": "http://test"}}, "context": map[string]any{"userInstructions": "STALE_INSTRUCTIONS"}, "runtime": map[string]any{"verify": false, "composeFinal": false}},
 		sessionNote:    "STALE_SESSION_NOTE", injections: []ContextInjection{{Content: "STALE_INJECTION", Constant: true}},
 		surfaces: []core.SurfaceSnapshot{{SemanticText: "STALE_SURFACE"}},
@@ -118,7 +118,7 @@ func TestProjectRevocationScrubsOldMachineContextBeforeSecondTurn(t *testing.T)
 	runner := &LLMRunner{Stream: func(ctx context.Context, model string, msgs []agentllm.Message, tools []agentllm.ToolDecl, opts agentllm.StreamOptions) <-chan agentllm.Event {
 		requests = append(requests, append([]agentllm.Message(nil), msgs...))
 		if len(requests) == 1 {
-			c.bundle = extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Version: "v2", AuthorizationEpoch: "duty-2", PublicationEpoch: "pub-2", Items: []extension.ProjectContextItem{{SourceID: "public", Text: "CURRENT_PUBLIC_FACT", Required: true}}}
+			c.bundle = extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Version: "v2", AuthorizationEpoch: "duty-2", PublicationEpoch: "pub-2", Items: []extension.ProjectContextItem{{SourceID: "public", Revision: "r1", Hash: "h2", Text: "CURRENT_PUBLIC_FACT", Required: true}}}
 		}
 		return base(ctx, model, msgs, tools, opts)
 	}}
@@ -160,7 +160,7 @@ func TestProjectSameScopeKeepsCurrentRunToolContext(t *testing.T) {
 		return base(ctx, model, msgs, tools, opts)
 	}}
 	c := &projectRunCtx{fakeRunCtx: &fakeRunCtx{ctx: context.Background(), projectID: "p1", prof: core.AgentProfile{Model: core.ModelRoute{Chat: "test-model"}}, execOutput: "AUTHORIZED_TOOL_RESULT"},
-		bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "fact", Text: "CURRENT_FACT", Required: true}}}}
+		bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "fact", Revision: "r1", Hash: "h1", Text: "CURRENT_FACT", Required: true}}}}
 	if err := runner.Execute(c); err != nil {
 		t.Fatal(err)
 	}
@@ -193,7 +193,7 @@ func TestSubagentModelRequestUsesProjectContextAndManifest(t *testing.T) {
 		return base(ctx, model, msgs, tools, opts)
 	}}
 	c := &projectRunCtx{fakeRunCtx: &fakeRunCtx{ctx: context.Background(), projectID: "project-1", prof: core.AgentProfile{Model: core.ModelRoute{Chat: "test-model", Lightweight: "test-lite"}}},
-		bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", Items: []extension.ProjectContextItem{{SourceID: "s1", Text: "current project fact", Required: true}}}}
+		bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", Items: []extension.ProjectContextItem{{SourceID: "s1", Revision: "r1", Hash: "h1", Text: "current project fact", Required: true}}}}
 	if err := sub.Execute(c); err != nil {
 		t.Fatal(err)
 	}
@@ -214,7 +214,7 @@ func TestSubagentSameScopeKeepsNewToolResultAcrossTurns(t *testing.T) {
 		return base(ctx, model, msgs, tools, opts)
 	}}
 	c := &projectRunCtx{fakeRunCtx: &fakeRunCtx{ctx: context.Background(), projectID: "p1", prof: core.AgentProfile{Model: core.ModelRoute{Chat: "test-model", Lightweight: "test-lite"}}, execOutput: "NEW_AUTHORIZED_TOOL"},
-		bundle:   extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "fact", Text: "CURRENT_FACT", Required: true}}},
+		bundle:   extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "fact", Revision: "r1", Hash: "h1", Text: "CURRENT_FACT", Required: true}}},
 		toolList: []core.ToolDesc{{Name: "knowledge_search", Description: "Search", Parameters: json.RawMessage(`{"type":"object"}`)}},
 	}
 	if err := sub.Execute(c); err != nil {
@@ -248,7 +248,7 @@ func TestProjectStreamBlocksRequestExceedingFinalModelBudget(t *testing.T) {
 		called = true
 		return scriptStream(textTurns("bad"), nil)(ctx, model, msgs, tools, opts)
 	}
-	c := &projectRunCtx{fakeRunCtx: &fakeRunCtx{projectID: "p1"}, bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Items: []extension.ProjectContextItem{{SourceID: "large", Text: strings.Repeat("x", 11000), Required: true}}}, budgetSettings: core.EffectiveSettings{"models": map[string]any{"chat": map[string]any{"contextWindow": float64(4096), "outputReserve": float64(512), "contextBuffer": float64(512)}}}}
+	c := &projectRunCtx{fakeRunCtx: &fakeRunCtx{projectID: "p1"}, bundle: extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "p1", Items: []extension.ProjectContextItem{{SourceID: "large", Revision: "r1", Hash: "h1", Text: strings.Repeat("x", 11000), Required: true}}}, budgetSettings: core.EffectiveSettings{"models": map[string]any{"chat": map[string]any{"contextWindow": float64(4096), "outputReserve": float64(512), "contextBuffer": float64(512)}}}}
 	for ev := range GuardProjectStream(c, "goal", base)(context.Background(), "test", []agentllm.Message{{Role: agentllm.RoleUser, Content: "goal"}}, nil, agentllm.StreamOptions{}) {
 		if ev.Kind != agentllm.KindError {
 			t.Fatalf("oversized request did not fail: %+v", ev)
@@ -335,7 +335,7 @@ func (c *projectSquadCtx) Run() core.Run {
 	return core.Run{ID: "run-squad", Owner: "alice", ProjectID: "project-1"}
 }
 func (c *projectSquadCtx) ProjectContext(context.Context, string, int) (extension.ProjectContextBundle, bool, error) {
-	return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "squad-source", Text: "squad project fact", Required: true}}}, true, nil
+	return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "squad-source", Revision: "r1", Hash: "h1", Text: "squad project fact", Required: true}}}, true, nil
 }
 func (c *projectSquadCtx) SaveContextManifest(_ context.Context, m extension.ProjectContextManifest) error {
 	c.manifests = append(c.manifests, m)
diff --git a/internal/runtime/workflow_compiled_test.go b/internal/runtime/workflow_compiled_test.go
index 51b1301..1f7148f 100644
--- a/internal/runtime/workflow_compiled_test.go
+++ b/internal/runtime/workflow_compiled_test.go
@@ -308,7 +308,7 @@ func (c *projectJudgeCtx) ProjectContext(context.Context, string, int) (extensio
 	if epoch == "" {
 		epoch = "duty-1"
 	}
-	return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", AuthorizationEpoch: epoch, PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "judge-source", Text: "current project rule", Required: true}}}, true, nil
+	return extension.ProjectContextBundle{Status: extension.ProjectContextReady, ProjectID: "project-1", AuthorizationEpoch: epoch, PublicationEpoch: "pub-1", Items: []extension.ProjectContextItem{{SourceID: "judge-source", Revision: "r1", Hash: "h1", Text: "current project rule", Required: true}}}, true, nil
 }
 func (c *projectJudgeCtx) SaveContextManifest(_ context.Context, m extension.ProjectContextManifest) error {
 	c.manifests = append(c.manifests, m)
diff --git a/internal/store/context_manifest.go b/internal/store/context_manifest.go
index 779f7b2..48e52a9 100644
--- a/internal/store/context_manifest.go
+++ b/internal/store/context_manifest.go
@@ -11,12 +11,10 @@ import (
 
 const contextManifestAction = "model.context_manifest"
 
-// ContextManifestScope records the exact trusted Resolve selector separately
-// from the public final-input manifest. Bound distinguishes an intentionally
-// empty goal from a legacy receipt with no recoverable selector.
+// ContextManifestScope records only that the request came from a trusted model
+// guard. Raw goals and model output are never persisted in this receipt.
 type ContextManifestScope struct {
-	Goal, TargetID string
-	Bound          bool
+	Bound bool
 }
 
 // AppendContextManifest writes to the trusted receipt table, never to the
@@ -50,17 +48,16 @@ func (s *Store) appendContextManifest(owner, targetID string, m extension.Projec
 	}
 	defer tx.Rollback()
 	if m.Delivery != "attempted" {
-		var attemptedGoal, attemptedTarget string
 		var attemptedBound int
-		err := tx.QueryRow(s.q(`SELECT resolve_goal,resolve_target_id,scope_bound FROM context_manifests WHERE attempt_id=? AND delivery='attempted' AND owner=? AND target_id=? AND project_id=? AND input_sha256=?`),
-			m.AttemptID, owner, targetID, m.ProjectID, m.InputSHA256).Scan(&attemptedGoal, &attemptedTarget, &attemptedBound)
+		err := tx.QueryRow(s.q(`SELECT scope_bound FROM context_manifests WHERE attempt_id=? AND delivery='attempted' AND owner=? AND target_id=? AND project_id=? AND input_sha256=?`),
+			m.AttemptID, owner, targetID, m.ProjectID, m.InputSHA256).Scan(&attemptedBound)
 		if errors.Is(err, sql.ErrNoRows) {
 			return errors.New("context manifest terminal receipt lacks matching attempt")
 		}
 		if err != nil {
 			return err
 		}
-		if attemptedGoal != scope.Goal || attemptedTarget != scope.TargetID || (attemptedBound != 0) != scope.Bound {
+		if (attemptedBound != 0) != scope.Bound {
 			return errors.New("context manifest terminal resolve scope changed")
 		}
 		var terminal int
@@ -76,8 +73,8 @@ func (s *Store) appendContextManifest(owner, targetID string, m extension.Projec
 	if scope.Bound {
 		bound = 1
 	}
-	_, err = tx.Exec(s.q(`INSERT INTO context_manifests(id,attempt_id,owner,target_id,project_id,input_sha256,delivery,manifest_json,created_at,resolve_goal,resolve_target_id,scope_bound) VALUES(?,?,?,?,?,?,?,?,?,?,?,?)`),
-		NewID("ctxm"), m.AttemptID, owner, targetID, m.ProjectID, m.InputSHA256, m.Delivery, string(raw), nowISO(), scope.Goal, scope.TargetID, bound)
+	_, err = tx.Exec(s.q(`INSERT INTO context_manifests(id,attempt_id,owner,target_id,project_id,input_sha256,delivery,manifest_json,created_at,scope_bound) VALUES(?,?,?,?,?,?,?,?,?,?)`),
+		NewID("ctxm"), m.AttemptID, owner, targetID, m.ProjectID, m.InputSHA256, m.Delivery, string(raw), nowISO(), bound)
 	if err != nil {
 		return fmt.Errorf("insert context manifest: %w", err)
 	}
diff --git a/internal/store/context_manifest_test.go b/internal/store/context_manifest_test.go
index c4411b8..2259897 100644
--- a/internal/store/context_manifest_test.go
+++ b/internal/store/context_manifest_test.go
@@ -1,7 +1,10 @@
 package store
 
 import (
+	"bytes"
+	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	"agent-system-backend/pkg/extension"
@@ -37,6 +40,132 @@ func TestContextManifestTerminalRequiresMatchingAttempt(t *testing.T) {
 	}
 }
 
+func TestContextManifestDoesNotPersistWorkflowOutputInResolveScope(t *testing.T) {
+	st, err := OpenSQLite(filepath.Join(t.TempDir(), "scope-privacy.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer st.Close()
+	const restricted = "OLD_RESTRICTED_BODY"
+	m := extension.ProjectContextManifest{ProjectID: "project-1", AttemptID: "judge-attempt", InputSHA256: "input-hash", Delivery: "attempted"}
+	scope := ContextManifestScope{Bound: true}
+	if err := st.AppendContextManifestWithScope("alice", "run-1", m, scope); err != nil {
+		t.Fatal(err)
+	}
+	m.Delivery = "responded"
+	if err := st.AppendContextManifestWithScope("alice", "run-1", m, scope); err != nil {
+		t.Fatal(err)
+	}
+	rows, err := st.db.Query(st.q(`SELECT delivery,manifest_json FROM context_manifests WHERE attempt_id=? ORDER BY created_at,id`), m.AttemptID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rows.Close()
+	seen := 0
+	for rows.Next() {
+		var delivery, manifest string
+		if err := rows.Scan(&delivery, &manifest); err != nil {
+			t.Fatal(err)
+		}
+		seen++
+		if strings.Contains(manifest, restricted) {
+			t.Errorf("%s trusted receipt persisted workflow output body", delivery)
+		}
+	}
+	if err := rows.Err(); err != nil {
+		t.Fatal(err)
+	}
+	if seen != 2 {
+		t.Fatalf("expected attempted and responded receipts, got %d", seen)
+	}
+	var rawColumns int
+	if err := st.db.QueryRow(`SELECT COUNT(*) FROM pragma_table_info('context_manifests') WHERE name IN ('resolve_goal','resolve_target_id')`).Scan(&rawColumns); err != nil || rawColumns != 0 {
+		t.Fatalf("fresh receipt schema retains raw scope columns: columns=%d err=%v", rawColumns, err)
+	}
+}
+
+func TestCandidateV34RawScopeColumnsAreScrubbedOnUpgrade(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "candidate-v34.db")
+	st, err := OpenSQLite(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	m := extension.ProjectContextManifest{ProjectID: "p1", AttemptID: "old-model", InputSHA256: "input", Delivery: "attempted"}
+	if err := st.AppendContextManifestWithScope("alice", "run-1", m, ContextManifestScope{Bound: true}); err != nil {
+		t.Fatal(err)
+	}
+	for _, query := range []string{
+		`DELETE FROM schema_migrations WHERE version=35`,
+		`ALTER TABLE context_manifests ADD COLUMN resolve_goal TEXT NOT NULL DEFAULT ''`,
+		`ALTER TABLE context_manifests ADD COLUMN resolve_target_id TEXT NOT NULL DEFAULT ''`,
+		`UPDATE context_manifests SET resolve_goal='OLD_RESTRICTED_BODY',resolve_target_id='doc-private'`,
+	} {
+		if _, err := st.db.Exec(query); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := st.Close(); err != nil {
+		t.Fatal(err)
+	}
+	upgraded, err := OpenSQLite(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer upgraded.Close()
+	var columns int
+	if err := upgraded.db.QueryRow(`SELECT COUNT(*) FROM pragma_table_info('context_manifests') WHERE name IN ('resolve_goal','resolve_target_id')`).Scan(&columns); err != nil || columns != 0 {
+		t.Fatalf("candidate raw scope columns survived v35: columns=%d err=%v", columns, err)
+	}
+	var count int
+	if err := upgraded.db.QueryRow(`SELECT COUNT(*) FROM context_manifests WHERE attempt_id='old-model'`).Scan(&count); err != nil || count != 1 {
+		t.Fatalf("trusted manifest disappeared during scrub: count=%d err=%v", count, err)
+	}
+	for _, suffix := range []string{"", "-wal"} {
+		data, err := os.ReadFile(path + suffix)
+		if err == nil && bytes.Contains(data, []byte("OLD_RESTRICTED_BODY")) {
+			t.Fatalf("candidate raw scope bytes remain in SQLite %s after upgrade", suffix)
+		}
+	}
+}
+
+func TestCandidateV34PostgresRawScopeScrubAndFreshSchema(t *testing.T) {
+	st := openTestStore(t)
+	if st.Dialect() != "postgres" {
+		t.Skip("isolated PostgreSQL DSN not configured")
+	}
+	checkColumns := func(want int) {
+		t.Helper()
+		var count int
+		if err := st.db.QueryRow(`SELECT COUNT(*) FROM information_schema.columns WHERE table_schema=current_schema() AND table_name='context_manifests' AND column_name IN ('resolve_goal','resolve_target_id')`).Scan(&count); err != nil || count != want {
+			t.Fatalf("raw scope columns=%d want=%d err=%v", count, want, err)
+		}
+	}
+	checkColumns(0)
+	m := extension.ProjectContextManifest{ProjectID: "p1", AttemptID: "candidate-model", InputSHA256: "input", Delivery: "attempted"}
+	if err := st.AppendContextManifestWithScope("alice", "run-1", m, ContextManifestScope{Bound: true}); err != nil {
+		t.Fatal(err)
+	}
+	for _, query := range []string{
+		`DELETE FROM schema_migrations WHERE version=35`,
+		`ALTER TABLE context_manifests ADD COLUMN resolve_goal TEXT NOT NULL DEFAULT ''`,
+		`ALTER TABLE context_manifests ADD COLUMN resolve_target_id TEXT NOT NULL DEFAULT ''`,
+		`UPDATE context_manifests SET resolve_goal='OLD_RESTRICTED_BODY',resolve_target_id='doc-private'`,
+	} {
+		if _, err := st.db.Exec(query); err != nil {
+			t.Fatal(err)
+		}
+	}
+	checkColumns(2)
+	if err := st.migrate(); err != nil {
+		t.Fatal(err)
+	}
+	checkColumns(0)
+	var count int
+	if err := st.db.QueryRow(`SELECT COUNT(*) FROM context_manifests WHERE attempt_id='candidate-model'`).Scan(&count); err != nil || count != 1 {
+		t.Fatalf("trusted manifest lost during PG scrub: count=%d err=%v", count, err)
+	}
+}
+
 func TestContextManifestTerminalCannotChangeTrustedResolveScope(t *testing.T) {
 	st, err := OpenSQLite(filepath.Join(t.TempDir(), "scope.db"))
 	if err != nil {
@@ -44,14 +173,11 @@ func TestContextManifestTerminalCannotChangeTrustedResolveScope(t *testing.T) {
 	}
 	defer st.Close()
 	m := extension.ProjectContextManifest{ProjectID: "p1", AttemptID: "model-1", WorkflowStepAttemptID: "engine/draft/1", InputSHA256: "input-hash", Delivery: "attempted"}
-	scope := ContextManifestScope{Goal: "draft from A", Bound: true}
+	scope := ContextManifestScope{Bound: true}
 	if err := st.AppendContextManifestWithScope("alice", "run-1", m, scope); err != nil {
 		t.Fatal(err)
 	}
 	m.Delivery = "responded"
-	if err := st.AppendContextManifestWithScope("alice", "run-1", m, ContextManifestScope{Goal: "draft from B", Bound: true}); err == nil {
-		t.Fatal("terminal receipt changed its trusted Resolve goal")
-	}
 	if err := st.AppendContextManifest("alice", "run-1", m); err == nil {
 		t.Fatal("terminal receipt dropped its trusted Resolve scope")
 	}
diff --git a/internal/store/migrate.go b/internal/store/migrate.go
index bf6fab9..b9bb9af 100644
--- a/internal/store/migrate.go
+++ b/internal/store/migrate.go
@@ -3,6 +3,7 @@ package store
 import (
 	"context"
 	"database/sql"
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -871,14 +872,18 @@ func init() {
 		},
 		migration{version: 34, name: "context_manifest_resolve_scope",
 			up: map[string][]string{
-				"sqlite":   {`ALTER TABLE context_manifests ADD COLUMN resolve_goal TEXT NOT NULL DEFAULT ''`, `ALTER TABLE context_manifests ADD COLUMN resolve_target_id TEXT NOT NULL DEFAULT ''`, `ALTER TABLE context_manifests ADD COLUMN scope_bound INTEGER NOT NULL DEFAULT 0`},
-				"postgres": {`ALTER TABLE context_manifests ADD COLUMN resolve_goal TEXT NOT NULL DEFAULT ''`, `ALTER TABLE context_manifests ADD COLUMN resolve_target_id TEXT NOT NULL DEFAULT ''`, `ALTER TABLE context_manifests ADD COLUMN scope_bound INTEGER NOT NULL DEFAULT 0`},
+				"sqlite":   {`ALTER TABLE context_manifests ADD COLUMN scope_bound INTEGER NOT NULL DEFAULT 0`},
+				"postgres": {`ALTER TABLE context_manifests ADD COLUMN scope_bound INTEGER NOT NULL DEFAULT 0`},
 			},
 			down: map[string][]string{
-				"sqlite":   {`ALTER TABLE context_manifests DROP COLUMN scope_bound`, `ALTER TABLE context_manifests DROP COLUMN resolve_target_id`, `ALTER TABLE context_manifests DROP COLUMN resolve_goal`},
-				"postgres": {`ALTER TABLE context_manifests DROP COLUMN scope_bound`, `ALTER TABLE context_manifests DROP COLUMN resolve_target_id`, `ALTER TABLE context_manifests DROP COLUMN resolve_goal`},
+				"sqlite":   {`ALTER TABLE context_manifests DROP COLUMN scope_bound`},
+				"postgres": {`ALTER TABLE context_manifests DROP COLUMN scope_bound`},
 			},
 		},
+		migration{version: 35, name: "scrub_candidate_context_scope_text",
+			up:   map[string][]string{"sqlite": {`SELECT 1`}, "postgres": {`SELECT 1`}},
+			down: map[string][]string{"sqlite": {`SELECT 1`}, "postgres": {`SELECT 1`}},
+		},
 	)
 }
 
@@ -971,10 +976,35 @@ func (s *Store) migrate() error {
 	if s.dialect.name() == "postgres" {
 		return s.migratePG()
 	}
+	var candidateRawColumns int
+	if err := s.db.QueryRow(`SELECT COUNT(*) FROM pragma_table_info('context_manifests') WHERE name IN ('resolve_goal','resolve_target_id')`).Scan(&candidateRawColumns); err != nil {
+		return err
+	}
 	// SQLite：_txlock=immediate（OpenSQLite DSN）保证迁移事务在 BEGIN 即取写锁，
 	// 跨进程迁移者按 busy_timeout 排队；后续版本读取发生在同一事务内，
 	// 前一个迁移者提交后本进程看到的已是完整账本（无部分版本可见）。
-	return s.migratePass()
+	if err := s.migratePass(); err != nil {
+		return err
+	}
+	if candidateRawColumns > 0 {
+		// The prior candidate schema may have stored full prompts. VACUUM is
+		// outside the DDL transaction; it compacts the isolated SQLite file
+		// after v35 drops those columns. Refuse to serve if compaction fails.
+		if _, err := s.db.Exec(`PRAGMA secure_delete=ON`); err != nil {
+			return fmt.Errorf("candidate context scrub: %w", err)
+		}
+		if _, err := s.db.Exec(`VACUUM`); err != nil {
+			return fmt.Errorf("candidate context scrub: %w", err)
+		}
+		var busy, logFrames, checkpointed int
+		if err := s.db.QueryRow(`PRAGMA wal_checkpoint(TRUNCATE)`).Scan(&busy, &logFrames, &checkpointed); err != nil {
+			return fmt.Errorf("candidate context scrub checkpoint: %w", err)
+		}
+		if busy != 0 {
+			return errors.New("candidate context scrub checkpoint remains busy")
+		}
+	}
+	return nil
 }
 
 // migratePG 以会话级咨询锁串行化并发迁移者（KTD8）：锁在专用连接上获取，
@@ -1052,6 +1082,11 @@ func (s *Store) migratePass() error {
 		if applied[m.version] {
 			continue
 		}
+		if m.version == 35 {
+			if err := scrubCandidateContextScope(tx, s.dialect.name()); err != nil {
+				return fmt.Errorf("migrate v35: %w", err)
+			}
+		}
 		stmts := m.up[s.dialect.name()]
 		if len(stmts) == 0 {
 			return fmt.Errorf("migrate: v%d %s 缺少 %s 方言", m.version, m.name, s.dialect.name())
@@ -1073,6 +1108,34 @@ func (s *Store) migratePass() error {
 	return tx.Commit()
 }
 
+// Candidate v34 was never released, but isolated test databases may already
+// contain raw Resolve goals. Fresh v34 creates no such columns; v35 removes
+// them conditionally from the earlier candidate schema before serving.
+func scrubCandidateContextScope(tx *sql.Tx, dialect string) error {
+	for _, column := range []string{"resolve_goal", "resolve_target_id"} {
+		var exists int
+		var err error
+		if dialect == "sqlite" {
+			err = tx.QueryRow(`SELECT COUNT(*) FROM pragma_table_info('context_manifests') WHERE name=?`, column).Scan(&exists)
+		} else {
+			err = tx.QueryRow(`SELECT COUNT(*) FROM information_schema.columns WHERE table_schema=current_schema() AND table_name='context_manifests' AND column_name=$1`, column).Scan(&exists)
+		}
+		if err != nil {
+			return err
+		}
+		if exists == 0 {
+			continue
+		}
+		if _, err := tx.Exec(`UPDATE context_manifests SET ` + column + `=''`); err != nil {
+			return err
+		}
+		if _, err := tx.Exec(`ALTER TABLE context_manifests DROP COLUMN ` + column); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func latestMigrationVersion() int {
 	if len(migrations) == 0 {
 		return 0
diff --git a/internal/store/migrate_compat.go b/internal/store/migrate_compat.go
index 7b17ce6..a3addac 100644
--- a/internal/store/migrate_compat.go
+++ b/internal/store/migrate_compat.go
@@ -39,6 +39,7 @@ var migrationBreaksOldReaders = map[int]bool{
 	32: false, // trusted_context_manifests：独立可信回执表，旧读者不受影响
 	33: false, // workflow_step_sources：新增逐步骤来源绑定表，旧读者不受影响
 	34: false, // context_manifest_resolve_scope：可信回执增加原Resolve范围，旧读者不受影响
+	35: false, // scrub_candidate_context_scope_text：候选v34原文列清理，旧读者不受影响
 }
 
 // SchemaTarget 是本二进制会迁移到的 schema 版本。
diff --git a/internal/store/workflow_step_source.go b/internal/store/workflow_step_source.go
index e5bbfad..7806c6b 100644
--- a/internal/store/workflow_step_source.go
+++ b/internal/store/workflow_step_source.go
@@ -40,17 +40,18 @@ func (s *Store) BindWorkflowStepSource(owner, runID, stepID, stepAttemptID, kind
 	if err != nil || run.Owner != owner || run.ProjectID == "" {
 		return WorkflowStepSource{}, ErrNotFound
 	}
-	rows, err := s.db.Query(s.q(`SELECT created_at,manifest_json,resolve_target_id,scope_bound FROM context_manifests WHERE owner=? AND target_id=? AND delivery='responded'`), owner, runID)
+	rows, err := s.db.Query(s.q(`SELECT created_at,delivery,manifest_json,scope_bound FROM context_manifests WHERE owner=? AND target_id=?`), owner, runID)
 	if err != nil {
 		return WorkflowStepSource{}, err
 	}
 	defer rows.Close()
 	var latest extension.ProjectContextManifest
 	var latestAt time.Time
+	states := map[string]uint8{}
 	for rows.Next() {
-		var atRaw, raw, resolveTarget string
+		var atRaw, delivery, raw string
 		var scopeBound int
-		if err := rows.Scan(&atRaw, &raw, &resolveTarget, &scopeBound); err != nil {
+		if err := rows.Scan(&atRaw, &delivery, &raw, &scopeBound); err != nil {
 			return WorkflowStepSource{}, err
 		}
 		at, err := time.Parse(time.RFC3339Nano, atRaw)
@@ -67,7 +68,19 @@ func (s *Store) BindWorkflowStepSource(owner, runID, stepID, stepAttemptID, kind
 		if m.WorkflowStepAttemptID != stepAttemptID {
 			continue
 		}
-		if scopeBound != 1 || resolveTarget != "" {
+		switch delivery {
+		case "attempted":
+			states[m.AttemptID] |= 1
+			continue
+		case "unknown":
+			states[m.AttemptID] |= 4
+			continue
+		case "responded":
+			states[m.AttemptID] |= 2
+		default:
+			return WorkflowStepSource{}, errors.New("workflow model receipt has unknown delivery state")
+		}
+		if scopeBound != 1 {
 			return WorkflowStepSource{}, errors.New("workflow step model receipt lacks trusted original Resolve scope")
 		}
 		if m.ProjectID != run.ProjectID || m.AuthorizationEpoch == "" || m.PublicationEpoch == "" || m.AttemptID == "" {
@@ -83,6 +96,11 @@ func (s *Store) BindWorkflowStepSource(owner, runID, stepID, stepAttemptID, kind
 	if err := rows.Err(); err != nil {
 		return WorkflowStepSource{}, err
 	}
+	for _, state := range states {
+		if state != 3 {
+			return WorkflowStepSource{}, errors.New("workflow step has an unsettled or unknown model attempt")
+		}
+	}
 	if latestAt.IsZero() {
 		return WorkflowStepSource{}, errors.New("workflow prompt output has no responded model receipt")
 	}
@@ -108,16 +126,17 @@ func (s *Store) RespondedWorkflowStepManifests(owner, runID, stepAttemptID strin
 	if owner == "" || runID == "" || stepAttemptID == "" {
 		return nil, errors.New("workflow receipt scope is incomplete")
 	}
-	rows, err := s.db.Query(s.q(`SELECT manifest_json,resolve_goal,resolve_target_id,scope_bound FROM context_manifests WHERE owner=? AND target_id=? AND delivery='responded' ORDER BY created_at,id`), owner, runID)
+	rows, err := s.db.Query(s.q(`SELECT delivery,manifest_json,scope_bound FROM context_manifests WHERE owner=? AND target_id=? ORDER BY created_at,id`), owner, runID)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
 	var out []ScopedContextManifest
+	states := map[string]uint8{}
 	for rows.Next() {
-		var raw, goal, target string
+		var delivery, raw string
 		var bound int
-		if err := rows.Scan(&raw, &goal, &target, &bound); err != nil {
+		if err := rows.Scan(&delivery, &raw, &bound); err != nil {
 			return nil, err
 		}
 		var manifest extension.ProjectContextManifest
@@ -127,11 +146,28 @@ func (s *Store) RespondedWorkflowStepManifests(owner, runID, stepAttemptID strin
 		if manifest.WorkflowStepAttemptID != stepAttemptID {
 			continue
 		}
-		out = append(out, ScopedContextManifest{Manifest: manifest, Scope: ContextManifestScope{Goal: goal, TargetID: target, Bound: bound == 1}})
+		switch delivery {
+		case "attempted":
+			states[manifest.AttemptID] |= 1
+			continue
+		case "unknown":
+			states[manifest.AttemptID] |= 4
+			continue
+		case "responded":
+			states[manifest.AttemptID] |= 2
+		default:
+			return nil, errors.New("workflow model receipt has unknown delivery state")
+		}
+		out = append(out, ScopedContextManifest{Manifest: manifest, Scope: ContextManifestScope{Bound: bound == 1}})
 	}
 	if err := rows.Err(); err != nil {
 		return nil, err
 	}
+	for _, state := range states {
+		if state != 3 {
+			return nil, errors.New("workflow step has an unsettled or unknown model attempt")
+		}
+	}
 	if len(out) == 0 {
 		return nil, ErrNotFound
 	}
diff --git a/internal/store/workflow_step_source_test.go b/internal/store/workflow_step_source_test.go
index f58d9f7..50eed31 100644
--- a/internal/store/workflow_step_source_test.go
+++ b/internal/store/workflow_step_source_test.go
@@ -30,7 +30,7 @@ func TestWorkflowStepSourceRequiresRespondedManifestAndExactRunStep(t *testing.T
 	}
 	started := time.Now().Add(-time.Second)
 	m := extension.ProjectContextManifest{ProjectID: p.ID, AttemptID: "attempt-1", WorkflowStepAttemptID: "engine-run/draft/1", Delivery: "attempted", InputSHA256: "input", AuthorizationEpoch: "duty-1", PublicationEpoch: "pub-1", Watermark: "w1"}
-	scope := ContextManifestScope{Goal: "draft report", Bound: true}
+	scope := ContextManifestScope{Bound: true}
 	if err := st.AppendContextManifestWithScope("alice", string(r.ID), m, scope); err != nil {
 		t.Fatal(err)
 	}
@@ -79,6 +79,21 @@ func TestWorkflowStepSourceRequiresRespondedManifestAndExactRunStep(t *testing.T
 	if _, err := st.BindWorkflowStepSource("alice", string(r.ID), "legacy", "engine-run/legacy/1", "prompt", started, []byte("legacy body")); err == nil {
 		t.Fatal("model receipt without bound original Resolve scope became a workflow source")
 	}
+	unknown := m
+	unknown.AttemptID, unknown.Delivery = "unknown-model-attempt", "attempted"
+	if err := st.AppendContextManifestWithScope("alice", string(r.ID), unknown, scope); err != nil {
+		t.Fatal(err)
+	}
+	unknown.Delivery = "unknown"
+	if err := st.AppendContextManifestWithScope("alice", string(r.ID), unknown, scope); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := st.RespondedWorkflowStepManifests("alice", string(r.ID), "engine-run/draft/1"); err == nil {
+		t.Fatal("unknown model attempt hidden by earlier responded attempt")
+	}
+	if _, err := st.BindWorkflowStepSource("alice", string(r.ID), "draft", "engine-run/draft/1", "prompt", started, []byte("old body")); err == nil {
+		t.Fatal("unknown model attempt rebound completed step")
+	}
 	if err := st.UnbindWorkflowStepSource("alice", string(r.ID), "draft"); err != nil {
 		t.Fatal(err)
 	}
diff --git a/internal/wfcompile/host.go b/internal/wfcompile/host.go
index b0ca13a..12a57da 100644
--- a/internal/wfcompile/host.go
+++ b/internal/wfcompile/host.go
@@ -98,6 +98,17 @@ type hostRunner struct {
 }
 
 func (r *hostRunner) Run(ctx context.Context, step squad.IntentStep) (*squad.ExecResult, error) {
+	if r.rc.Run().ProjectID != "" {
+		guard, ok := r.rc.(ProjectStepProvenance)
+		if !ok {
+			return &squad.ExecResult{Success: false, ErrorReason: "project workflow source guard unavailable"}, nil
+		}
+		wsDir := filepath.Dir(filepath.Dir(step.WorkDir))
+		strict := step.IntentID == IntentTool || step.IntentID == IntentArtifact || step.IntentID == IntentScript || step.IntentID == IntentCritic
+		if err := verifyPriorWorkflowOutputs(ctx, guard, wsDir, r.subOf, r.stepKinds, strict); err != nil {
+			return &squad.ExecResult{Success: false, ErrorReason: err.Error()}, nil
+		}
+	}
 	var content string
 	var fields map[string]string
 	var err error
diff --git a/internal/wfcompile/project_backend.go b/internal/wfcompile/project_backend.go
index 47e2e1c..08eb01a 100644
--- a/internal/wfcompile/project_backend.go
+++ b/internal/wfcompile/project_backend.go
@@ -2,6 +2,7 @@ package wfcompile
 
 import (
 	"context"
+	"path/filepath"
 
 	"agent-squad/squad"
 	"agent-system-backend/internal/projectcontext"
@@ -10,7 +11,7 @@ import (
 // projectStepBackends carries the engine-generated execution ID through the
 // executor's request context into each model manifest. This associates a
 // responded model request with exactly one workflow step attempt.
-func projectStepBackends(base *squad.BackendResolver) *squad.BackendResolver {
+func projectStepBackends(base *squad.BackendResolver, rc ProjectStepProvenance, subOf, kinds map[string]string) *squad.BackendResolver {
 	wrapped := squad.NewBackendResolver()
 	for _, name := range base.ListBackends() {
 		backendName := name
@@ -19,13 +20,17 @@ func projectStepBackends(base *squad.BackendResolver) *squad.BackendResolver {
 			if err != nil {
 				return nil, err
 			}
-			return &projectStepExecutor{next: backend}, nil
+			return &projectStepExecutor{next: backend, rc: rc, subOf: subOf, kinds: kinds}, nil
 		})
 	}
 	return wrapped
 }
 
-type projectStepExecutor struct{ next squad.Executor }
+type projectStepExecutor struct {
+	next         squad.Executor
+	rc           ProjectStepProvenance
+	subOf, kinds map[string]string
+}
 
 func (e *projectStepExecutor) Name() string { return e.next.Name() }
 
@@ -33,5 +38,11 @@ func (e *projectStepExecutor) Execute(ctx context.Context, req squad.ExecRequest
 	if req.ExecutionID == "" {
 		return &squad.ExecResult{Success: false, ErrorReason: "project workflow step attempt unavailable"}, nil
 	}
+	if e.rc != nil {
+		wsDir := filepath.Dir(filepath.Dir(req.WorkDir))
+		if err := verifyPriorWorkflowOutputs(ctx, e.rc, wsDir, e.subOf, e.kinds, true); err != nil {
+			return &squad.ExecResult{Success: false, ErrorReason: err.Error()}, nil
+		}
+	}
 	return e.next.Execute(projectcontext.WithWorkflowStepAttempt(ctx, req.ExecutionID), req)
 }
diff --git a/internal/wfcompile/project_sources.go b/internal/wfcompile/project_sources.go
index 0c971ab..c191f94 100644
--- a/internal/wfcompile/project_sources.go
+++ b/internal/wfcompile/project_sources.go
@@ -3,6 +3,7 @@ package wfcompile
 import (
 	"context"
 	"errors"
+	"fmt"
 	"os"
 	"path/filepath"
 	"sync"
@@ -11,6 +12,41 @@ import (
 	"agent-squad/squad"
 )
 
+// verifyPriorWorkflowOutputs is shared by model and host steps. The engine's
+// task brief/blackboard/handoff can carry earlier output as a fresh user
+// prompt, so every completed machine step must have a current source proof.
+func verifyPriorWorkflowOutputs(ctx context.Context, rc ProjectStepProvenance, wsDir string, subOf, kinds map[string]string, modelSend bool) error {
+	state, err := (squad.FileStore{}).LoadRun(wsDir)
+	if err != nil {
+		return fmt.Errorf("project workflow state unavailable: %w", err)
+	}
+	for _, step := range state.Plan.Workflow.Steps {
+		if step.Status != "completed" {
+			continue
+		}
+		switch kinds[step.ID] {
+		case "prompt":
+			sub := subOf[step.ID]
+			if sub == "" || step.AttemptID == "" {
+				return fmt.Errorf("project workflow step %s lacks source identity", step.ID)
+			}
+			data, err := os.ReadFile(filepath.Join(wsDir, filepath.FromSlash(sub), "output.md"))
+			if err != nil {
+				return fmt.Errorf("project workflow step %s output unavailable: %w", step.ID, err)
+			}
+			if err := rc.VerifyProjectStepOutput(ctx, step.ID, step.AttemptID, "prompt", data); err != nil {
+				return fmt.Errorf("project workflow step %s output source changed: %w", step.ID, err)
+			}
+		case "hitl", "critic": // human input or a verdict whose prompt source was checked above
+		default:
+			if modelSend {
+				return fmt.Errorf("project workflow step %s has unproven machine output", step.ID)
+			}
+		}
+	}
+	return nil
+}
+
 // completedStepAttempt comes from the squad engine's persisted state, not a
 // model response or plugin argument. It identifies the exact execution that
 // produced output.md, including after a workflow resumes.
diff --git a/internal/wfcompile/run.go b/internal/wfcompile/run.go
index 8799e13..41c011b 100644
--- a/internal/wfcompile/run.go
+++ b/internal/wfcompile/run.go
@@ -80,6 +80,9 @@ func RunCompiled(rc Host, deps Deps, launch workflow.Launch, vars workflow.Vars,
 	for _, step := range def.Steps {
 		stepKinds[step.ID] = step.Kind
 	}
+	for _, pair := range compiled.Critics {
+		stepKinds[pair.EvalID] = "critic"
+	}
 	if rc.Run().ProjectID != "" {
 		if _, ok := rc.(ProjectStepProvenance); !ok {
 			return Outcome{}, fmt.Errorf("项目工作流缺少可信步骤产物绑定能力")
@@ -97,7 +100,7 @@ func RunCompiled(rc Host, deps Deps, launch workflow.Launch, vars workflow.Vars,
 		backends = squad.NewBackendResolver()
 	}
 	if rc.Run().ProjectID != "" {
-		backends = projectStepBackends(backends)
+		backends = projectStepBackends(backends, rc.(ProjectStepProvenance), compiled.SubOf, stepKinds)
 	}
 	runner := &hostRunner{
 		rc: rc, deps: deps, scripts: launch.Scripts, subOf: compiled.SubOf,
diff --git a/internal/wfcompile/wfcompile_test.go b/internal/wfcompile/wfcompile_test.go
index a9a57e2..7ec0bfa 100644
--- a/internal/wfcompile/wfcompile_test.go
+++ b/internal/wfcompile/wfcompile_test.go
@@ -476,7 +476,7 @@ func TestProjectStepBackendCarriesEngineAttempt(t *testing.T) {
 	probe := &stepContextProbe{}
 	base := squad.NewBackendResolver()
 	base.RegisterInstance("probe", probe)
-	backend, _, err := projectStepBackends(base).Resolve(squad.RoleSpec{Role: "writer", Backend: "probe"}, "")
+	backend, _, err := projectStepBackends(base, nil, nil, nil).Resolve(squad.RoleSpec{Role: "writer", Backend: "probe"}, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -563,11 +563,24 @@ func TestProjectToolCriticRejectsUnprovenOutputBeforeModel(t *testing.T) {
 		return verdictStream(verdictPass)(ctx, model, messages, tools, opts)
 	}
 	_, err := RunCompiled(f, Deps{DataDir: t.TempDir(), JudgeStream: judge}, workflow.Launch{Def: def}, workflow.Vars{Input: "read"}, RunOptions{})
-	if err == nil || called || !strings.Contains(err.Error(), "产物依据不可用") {
+	if err == nil || called || (!strings.Contains(err.Error(), "产物依据不可用") && !strings.Contains(err.Error(), "unproven machine output")) {
 		t.Fatalf("unproven tool output reached judge: err=%v called=%v", err, called)
 	}
 }
 
+func TestProjectModelStepRejectsEarlierToolOutputInTaskBrief(t *testing.T) {
+	f := &projectSourceHost{fakeHost: &fakeHost{toolNames: []string{"time_now"}}}
+	be := &seqBackend{texts: []string{"should not run"}}
+	def := core.WorkflowDef{ID: "tool-then-model", Title: "Tool then model", Steps: []core.WorkflowStep{
+		{ID: "get", Title: "Read", Kind: "tool", Tool: "time_now"},
+		{ID: "draft", Title: "Draft", Kind: "prompt", Agent: "writer", Prompt: "use {{steps.get.output}}"},
+	}}
+	_, err := RunCompiled(f, Deps{DataDir: t.TempDir(), Backends: seqResolver(t, be), DefaultBackend: "seq"}, workflow.Launch{Def: def}, workflow.Vars{Input: "write"}, RunOptions{})
+	if err == nil || be.calls != 0 || !strings.Contains(err.Error(), "unproven machine output") {
+		t.Fatalf("tool output entered project model step: err=%v modelCalls=%d", err, be.calls)
+	}
+}
+
 // critic 预算耗尽仍不通过 → 工作流失败（P4 fail-closed）。
 func TestRunCompiledCriticExhaustedFails(t *testing.T) {
 	def := parseDef(t, demoBriefJSON)
diff --git a/pkg/extension/project_context.go b/pkg/extension/project_context.go
index 2010b0c..9c207bb 100644
--- a/pkg/extension/project_context.go
+++ b/pkg/extension/project_context.go
@@ -83,6 +83,27 @@ type ProjectContextProvider interface {
 	ReadEvidence(context.Context, ProjectEvidenceRequest) (ProjectEvidence, error)
 }
 
+// ProjectContextSourceRecheckRequest names only sources already present in a
+// trusted model-input receipt. Scope identity is rebuilt by Backend from the
+// persisted run; no prompt, output body, or caller-chosen owner is accepted.
+type ProjectContextSourceRecheckRequest struct {
+	Scope             ProjectContextRequest
+	Included          []ProjectContextManifestEntry
+	OfferedReferences []ProjectEvidenceRef
+	ReadEvidence      []ProjectContextManifestEntry
+}
+
+// ProjectContextSourceRecheckResult contains current authorized source text
+// only for transient Backend hash verification. It is never stored as a new
+// model receipt. Every requested source/ref must be present in Bundle.
+type ProjectContextSourceRecheckResult struct{ Bundle ProjectContextBundle }
+
+// ProjectContextSourceRechecker is an optional method of the same registered
+// ProjectContextProvider. Project workflow reuse fails closed without it.
+type ProjectContextSourceRechecker interface {
+	Recheck(context.Context, ProjectContextSourceRecheckRequest) (ProjectContextSourceRecheckResult, error)
+}
+
 // WorkCompletionRequest gives the generation goal and optional target. It has
 // no owner/project field; both are resolved from the dispatch host's stored
 // conversation immediately before the model call.
diff --git a/pkg/extension/surface.txt b/pkg/extension/surface.txt
index c3a08ec..e8d69ad 100644
--- a/pkg/extension/surface.txt
+++ b/pkg/extension/surface.txt
@@ -46,6 +46,10 @@ ProjectContextReady
 ProjectContextRegistry
 ProjectContextRegistry.RegisterProjectContextProvider
 ProjectContextRequest
+ProjectContextSourceRecheckRequest
+ProjectContextSourceRecheckResult
+ProjectContextSourceRechecker
+ProjectContextSourceRechecker.Recheck
 ProjectContextStatus
 ProjectEvidence
 ProjectEvidenceRef