diff --git a/evals/learning_arc/run_demo.py b/evals/learning_arc/run_demo.py
index fcd134e6..934431d8 100644
--- a/evals/learning_arc/run_demo.py
+++ b/evals/learning_arc/run_demo.py
@@ -177,7 +177,8 @@ def _scene1_cold_session(
     rt = ChatRuntime(config=cfg, engine_state_path=engine_state_dir)
     response = rt.chat(_DEMO_PROMPT)
 
-    candidates_file = engine_state_dir / "discovery_candidates.jsonl"
+    from engine_state import EngineStateStore
+    candidates_file = EngineStateStore(engine_state_dir)._resolve_dir() / "discovery_candidates.jsonl"
     candidates_persisted = (
         len(candidates_file.read_text(encoding="utf-8").splitlines())
         if candidates_file.exists()
@@ -213,7 +214,8 @@ def _scene2_checkpoint_enrichment(
         "not by the operator.  Sub-questions enumerate candidate "
         "chains the engine identified through corpus decomposition.",
     )
-    candidates_file = engine_state_dir / "discovery_candidates.jsonl"
+    from engine_state import EngineStateStore
+    candidates_file = EngineStateStore(engine_state_dir)._resolve_dir() / "discovery_candidates.jsonl"
     if not candidates_file.exists():
         raise RuntimeError("engine state has no discovery_candidates.jsonl — S1 did not persist")
     lines = [l for l in candidates_file.read_text(encoding="utf-8").splitlines() if l.strip()]
diff --git a/tests/test_workbench_construction_evidence.py b/tests/test_workbench_construction_evidence.py
new file mode 100644
index 00000000..c093ae2e
--- /dev/null
+++ b/tests/test_workbench_construction_evidence.py
@@ -0,0 +1,98 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from workbench.construction_evidence import (
+    CONSTRUCTION_EVIDENCE_ABSENT,
+    ConstructionEvidence,
+    SourceSpanView,
+    construction_evidence_from_journal_entry,
+    missing_construction_evidence,
+    span_is_exact,
+)
+from workbench.schemas import to_data
+
+
+@dataclass(frozen=True, slots=True)
+class _Entry:
+    turn_id: int
+
+
+def test_missing_construction_evidence_is_diagnostic_and_non_serving() -> None:
+    evidence = missing_construction_evidence(7, "not persisted")
+
+    assert evidence.schema_version == "construction_evidence_v1"
+    assert evidence.turn_id == 7
+    assert evidence.status == "missing_evidence"
+    assert evidence.missing_reason == "not persisted"
+    assert evidence.problem_text is None
+    assert evidence.proposals == []
+    assert evidence.mentions == []
+    assert evidence.bindings == []
+    assert evidence.bound_relations == []
+    assert evidence.contract_assessments == []
+    assert evidence.diagnostic_only is True
+    assert evidence.serving_allowed is False
+
+
+def test_construction_evidence_from_legacy_journal_entry_fails_closed() -> None:
+    evidence = construction_evidence_from_journal_entry(_Entry(turn_id=3))
+
+    assert evidence.status == "missing_evidence"
+    assert evidence.turn_id == 3
+    assert evidence.missing_reason == CONSTRUCTION_EVIDENCE_ABSENT
+    assert evidence.diagnostic_only is True
+    assert evidence.serving_allowed is False
+
+
+def test_construction_evidence_to_data_serializes_dataclasses() -> None:
+    payload = to_data(missing_construction_evidence(1, "absent"))
+
+    assert payload == {
+        "schema_version": "construction_evidence_v1",
+        "turn_id": 1,
+        "status": "missing_evidence",
+        "missing_reason": "absent",
+        "problem_text": None,
+        "proposals": [],
+        "mentions": [],
+        "bindings": [],
+        "bound_relations": [],
+        "contract_assessments": [],
+        "diagnostic_only": True,
+        "serving_allowed": False,
+    }
+
+
+def test_span_is_exact_accepts_exact_slice() -> None:
+    text = "Lena has 3 red marbles."
+    assert span_is_exact(text, SourceSpanView(start=9, end=10, text="3")) is True
+
+
+def test_span_is_exact_rejects_repaired_or_shifted_slice() -> None:
+    text = "Lena has 3 red marbles."
+
+    assert span_is_exact(text, SourceSpanView(start=9, end=10, text="three")) is False
+    assert span_is_exact(text, SourceSpanView(start=8, end=9, text="3")) is False
+    assert span_is_exact(text, SourceSpanView(start=-1, end=1, text="L")) is False
+    assert span_is_exact(text, SourceSpanView(start=9, end=200, text="3")) is False
+    assert span_is_exact(text, SourceSpanView(start=9, end=9, text="")) is False
+
+
+def test_existing_construction_evidence_instance_round_trips() -> None:
+    existing = ConstructionEvidence(
+        schema_version="construction_evidence_v1",
+        turn_id=11,
+        status="recorded",
+        missing_reason=None,
+        problem_text="x",
+        diagnostic_only=True,
+        serving_allowed=False,
+    )
+
+    @dataclass(frozen=True, slots=True)
+    class EntryWithPayload:
+        turn_id: int
+        construction_evidence: ConstructionEvidence
+
+    assert construction_evidence_from_journal_entry(EntryWithPayload(11, existing)) is existing
diff --git a/tests/test_workbench_demo_narrative.py b/tests/test_workbench_demo_narrative.py
new file mode 100644
index 00000000..3a8036cb
--- /dev/null
+++ b/tests/test_workbench_demo_narrative.py
@@ -0,0 +1,132 @@
+from __future__ import annotations
+
+from workbench.demo_narrative import (
+    DemoEvidenceLink,
+    DemoNarrative,
+    DemoNarrativeStep,
+    demo_partner_blurb,
+    validate_demo_narrative,
+)
+from workbench.schemas import to_data
+
+
+def test_demo_narrative_requires_proof_and_non_proof_claims() -> None:
+    narrative = DemoNarrative(
+        narrative_id="bad",
+        title="Bad demo",
+        summary="missing honesty cards",
+        steps=[
+            DemoNarrativeStep(
+                step_id="s1",
+                order=1,
+                kind="evidence",
+                title="Trace",
+                claim="trace exists",
+                what_this_proves="",
+                what_this_does_not_prove="",
+            )
+        ],
+    )
+
+    assert validate_demo_narrative(narrative) == [
+        "step s1 is missing what_this_proves",
+        "step s1 is missing what_this_does_not_prove",
+    ]
+
+
+def test_demo_narrative_requires_route_evidence_links() -> None:
+    narrative = DemoNarrative(
+        narrative_id="bad-route",
+        title="Bad route",
+        summary="bad evidence link",
+        steps=[
+            DemoNarrativeStep(
+                step_id="s1",
+                order=1,
+                kind="evidence",
+                title="Trace",
+                claim="trace exists",
+                what_this_proves="a trace route can be opened",
+                what_this_does_not_prove="that the answer is correct",
+                evidence_links=[DemoEvidenceLink(label="bad", route="trace/1")],
+            )
+        ],
+    )
+
+    assert validate_demo_narrative(narrative) == [
+        "step s1 has non-route evidence link: trace/1"
+    ]
+
+
+def test_demo_narrative_detects_duplicate_steps_and_order() -> None:
+    narrative = DemoNarrative(
+        narrative_id="bad-order",
+        title="Bad order",
+        summary="duplicate ids and unsorted order",
+        steps=[
+            DemoNarrativeStep(
+                step_id="s1",
+                order=2,
+                kind="evidence",
+                title="Trace B",
+                claim="claim",
+                what_this_proves="proof",
+                what_this_does_not_prove="non-proof",
+            ),
+            DemoNarrativeStep(
+                step_id="s1",
+                order=1,
+                kind="audit",
+                title="Audit A",
+                claim="claim",
+                what_this_proves="proof",
+                what_this_does_not_prove="non-proof",
+            ),
+        ],
+    )
+
+    assert validate_demo_narrative(narrative) == [
+        "duplicate step_id: s1",
+        "steps must be sorted by order",
+    ]
+
+
+def test_valid_demo_narrative_serializes() -> None:
+    narrative = DemoNarrative(
+        narrative_id="deterministic-turn",
+        title="Deterministic Turn Evidence",
+        summary="Chat to Trace to Replay",
+        steps=[
+            DemoNarrativeStep(
+                step_id="trace",
+                order=1,
+                kind="evidence",
+                title="Open Trace",
+                claim="The journaled turn has trace evidence.",
+                what_this_proves="The selected turn has recorded evidence.",
+                what_this_does_not_prove="It does not prove answer correctness by itself.",
+                evidence_links=[
+                    DemoEvidenceLink(
+                        label="Trace",
+                        route="/trace/1",
+                        artifact_id="turn:1",
+                        digest="sha256:abc",
+                        reproducer="curl /trace/1",
+                    )
+                ],
+            )
+        ],
+    )
+
+    assert validate_demo_narrative(narrative) == []
+    payload = to_data(narrative)
+    assert payload["narrative_id"] == "deterministic-turn"
+    assert payload["steps"][0]["evidence_links"][0]["route"] == "/trace/1"
+
+
+def test_partner_blurb_states_core_demo_thesis() -> None:
+    blurb = demo_partner_blurb()
+
+    assert "frontier model can propose" in blurb
+    assert "CORE can govern" in blurb
+    assert "Workbench can prove" in blurb
diff --git a/tests/test_workbench_generalization_evidence.py b/tests/test_workbench_generalization_evidence.py
new file mode 100644
index 00000000..b4fd46d1
--- /dev/null
+++ b/tests/test_workbench_generalization_evidence.py
@@ -0,0 +1,91 @@
+from __future__ import annotations
+
+import pytest
+
+from workbench.generalization_evidence import (
+    contains_forbidden_raw_item_keys,
+    generalization_audit_banner,
+    generalization_report_view_from_payload,
+)
+from workbench.schemas import to_data
+
+
+def test_generalization_report_view_is_aggregate_only() -> None:
+    view = generalization_report_view_from_payload(
+        {
+            "policy_version": "generalization_benchmark_policy_v1",
+            "dataset": "gsm1k",
+            "split": "local_audit",
+            "n_items": 10,
+            "correct": 4,
+            "wrong": 0,
+            "refused": 6,
+            "unsupported": 0,
+            "candidate_attempts": 3,
+            "binding_failures": 2,
+            "replay_refusals": 1,
+            "sealed_trace_dispositions": {"sealed": 7, "refused": 3},
+            "dominant_residual_kinds": {"missing_binding": 5},
+            "reason_codes": ["ok", "binding_missing"],
+        },
+        source_path="evals/generalization/reports/gsm1k.json",
+        source_digest="sha256:abc",
+        report_kind="committed_pin",
+    )
+
+    assert view.policy_version == "generalization_benchmark_policy_v1"
+    assert view.dataset == "gsm1k"
+    assert view.split == "local_audit"
+    assert view.correct == 4
+    assert view.wrong == 0
+    assert view.refused == 6
+    assert view.audit_only is True
+    assert view.raw_items_exposed is False
+    assert view.report_kind == "committed_pin"
+    assert view.sealed_trace_dispositions == [("refused", 3), ("sealed", 7)]
+    assert view.dominant_residual_kinds == [("missing_binding", 5)]
+
+
+def test_generalization_report_rejects_raw_item_fields() -> None:
+    with pytest.raises(ValueError, match="raw item"):
+        generalization_report_view_from_payload(
+            {
+                "dataset": "bad",
+                "split": "sealed",
+                "n_items": 1,
+                "items": [{"question": "secret", "answer": "secret"}],
+            }
+        )
+
+
+def test_contains_forbidden_raw_item_keys_recurses() -> None:
+    assert contains_forbidden_raw_item_keys({"nested": {"gold_answer": "42"}}) is True
+    assert contains_forbidden_raw_item_keys({"aggregate": {"correct": 1}}) is False
+
+
+def test_generalization_report_serializes_as_safe_dataclass() -> None:
+    payload = to_data(
+        generalization_report_view_from_payload(
+            {
+                "dataset": "asdiv",
+                "split": "public",
+                "n_items": 0,
+            }
+        )
+    )
+
+    assert payload["dataset"] == "asdiv"
+    assert payload["split"] == "public"
+    assert payload["audit_only"] is True
+    assert payload["raw_items_exposed"] is False
+    assert "items" not in payload
+    assert "question" not in payload
+    assert "answer" not in payload
+
+
+def test_generalization_audit_banner_states_governance_boundary() -> None:
+    banner = generalization_audit_banner()
+
+    assert "Audit-only" in banner
+    assert "No raw sealed items" in banner
+    assert "not direct mutation targets" in banner
diff --git a/tests/test_workbench_proposal_artifact.py b/tests/test_workbench_proposal_artifact.py
new file mode 100644
index 00000000..8f7ec6a0
--- /dev/null
+++ b/tests/test_workbench_proposal_artifact.py
@@ -0,0 +1,88 @@
+from __future__ import annotations
+
+import pytest
+
+from workbench.proposal_artifact import (
+    capability_disclosure,
+    proposal_artifact_from_minimal,
+    ratification_affordance_allowed,
+)
+from workbench.schemas import to_data
+
+
+def test_inspect_only_artifact_disallows_ratification_affordance() -> None:
+    artifact = proposal_artifact_from_minimal(
+        proposal_id="p1",
+        subject_kind="construction",
+        subject_id="turn:1",
+        display_name="Construction proposal preview",
+        source_kind="construction_evidence",
+    )
+
+    assert artifact.capability_level == "inspect_only"
+    assert ratification_affordance_allowed(artifact) is False
+    assert "Inspect-only" in capability_disclosure(artifact)
+
+
+def test_proposal_only_artifact_disallows_ratification_affordance() -> None:
+    artifact = proposal_artifact_from_minimal(
+        proposal_id="p2",
+        subject_kind="logos_pack",
+        subject_id="logos:demo",
+        display_name="CORE-Logos draft",
+        source_kind="logos_pack",
+        capability_level="proposal_only",
+    )
+
+    assert ratification_affordance_allowed(artifact) is False
+    assert "Proposal-only" in capability_disclosure(artifact)
+
+
+def test_ratification_enabled_requires_handler_route_for_affordance() -> None:
+    artifact = proposal_artifact_from_minimal(
+        proposal_id="p3",
+        subject_kind="math",
+        subject_id="math:p3",
+        display_name="Math proposal",
+        source_kind="math",
+        capability_level="ratification_enabled",
+        handler_route="/math-proposals/p3/ratify",
+    )
+
+    assert ratification_affordance_allowed(artifact) is True
+    assert "admitted handler" in capability_disclosure(artifact)
+
+
+def test_handler_route_without_ratification_capability_is_rejected() -> None:
+    with pytest.raises(ValueError, match="handler_route"):
+        proposal_artifact_from_minimal(
+            proposal_id="p4",
+            subject_kind="construction",
+            subject_id="turn:4",
+            display_name="Invalid preview",
+            source_kind="construction_evidence",
+            capability_level="inspect_only",
+            handler_route="/invalid",
+        )
+
+
+def test_proposal_artifact_serializes_as_dataclass_payload() -> None:
+    payload = to_data(
+        proposal_artifact_from_minimal(
+            proposal_id="p5",
+            subject_kind="cognition",
+            subject_id="candidate:p5",
+            display_name="Cognition proposal",
+            source_kind="teaching_proposal_log",
+            state="pending",
+        )
+    )
+
+    assert payload["proposal_id"] == "p5"
+    assert payload["subject"] == {
+        "kind": "cognition",
+        "subject_id": "candidate:p5",
+        "display_name": "Cognition proposal",
+    }
+    assert payload["capability_level"] == "inspect_only"
+    assert payload["handler_route"] is None
diff --git a/workbench-ui/src/app/demos/demoNarrativeView.test.ts b/workbench-ui/src/app/demos/demoNarrativeView.test.ts
new file mode 100644
index 00000000..7a8ecbac
--- /dev/null
+++ b/workbench-ui/src/app/demos/demoNarrativeView.test.ts
@@ -0,0 +1,92 @@
+import { describe, expect, it } from "vitest";
+import type { DemoNarrative } from "../../types/demoNarrative";
+import {
+  DEMO_PARTNER_BLURB,
+  demoNarrativeValidationWarnings,
+  demoStepHonestyPair,
+} from "./demoNarrativeView";
+
+const narrative: DemoNarrative = {
+  narrative_id: "deterministic-turn",
+  title: "Deterministic Turn Evidence",
+  summary: "Chat to Trace to Replay",
+  steps: [
+    {
+      step_id: "trace",
+      order: 1,
+      kind: "evidence",
+      title: "Open Trace",
+      claim: "The journaled turn has trace evidence.",
+      what_this_proves: "The selected turn has recorded evidence.",
+      what_this_does_not_prove: "It does not prove answer correctness by itself.",
+      evidence_links: [
+        {
+          label: "Trace",
+          route: "/trace/1",
+          artifact_id: "turn:1",
+          digest: "sha256:abc",
+          reproducer: "curl /trace/1",
+        },
+      ],
+      failure_mode: null,
+    },
+  ],
+};
+
+describe("demo narrative view helpers", () => {
+  it("states the partner demo thesis", () => {
+    expect(DEMO_PARTNER_BLURB).toContain("frontier model can propose");
+    expect(DEMO_PARTNER_BLURB).toContain("CORE can govern");
+    expect(DEMO_PARTNER_BLURB).toContain("Workbench can prove");
+  });
+
+  it("accepts valid narratives", () => {
+    expect(demoNarrativeValidationWarnings(narrative)).toEqual([]);
+  });
+
+  it("requires both proof and non-proof claims", () => {
+    expect(
+      demoNarrativeValidationWarnings({
+        ...narrative,
+        steps: [
+          {
+            ...narrative.steps[0],
+            what_this_proves: "",
+            what_this_does_not_prove: "",
+          },
+        ],
+      }),
+    ).toEqual([
+      "step trace is missing what_this_proves",
+      "step trace is missing what_this_does_not_prove",
+    ]);
+  });
+
+  it("requires route-shaped evidence links", () => {
+    expect(
+      demoNarrativeValidationWarnings({
+        ...narrative,
+        steps: [
+          {
+            ...narrative.steps[0],
+            evidence_links: [
+              {
+                label: "bad",
+                route: "trace/1",
+                artifact_id: null,
+                digest: null,
+                reproducer: null,
+              },
+            ],
+          },
+        ],
+      }),
+    ).toEqual(["step trace has non-route evidence link: trace/1"]);
+  });
+
+  it("renders honesty pair", () => {
+    expect(demoStepHonestyPair(narrative.steps[0])).toBe(
+      "Proves: The selected turn has recorded evidence. / Does not prove: It does not prove answer correctness by itself.",
+    );
+  });
+});
diff --git a/workbench-ui/src/app/demos/demoNarrativeView.ts b/workbench-ui/src/app/demos/demoNarrativeView.ts
new file mode 100644
index 00000000..d0284c65
--- /dev/null
+++ b/workbench-ui/src/app/demos/demoNarrativeView.ts
@@ -0,0 +1,38 @@
+import type { DemoNarrative } from "../../types/demoNarrative";
+
+export const DEMO_PARTNER_BLURB =
+  "A frontier model can propose. CORE can govern. Workbench can prove what happened, what was refused, what replayed, and what remains only a proposal.";
+
+export function demoNarrativeValidationWarnings(narrative: DemoNarrative): string[] {
+  const warnings: string[] = [];
+  const seen = new Set<string>();
+  const orders = narrative.steps.map((step) => step.order);
+
+  for (const step of narrative.steps) {
+    if (seen.has(step.step_id)) {
+      warnings.push(`duplicate step_id: ${step.step_id}`);
+    }
+    seen.add(step.step_id);
+    if (step.what_this_proves.trim().length === 0) {
+      warnings.push(`step ${step.step_id} is missing what_this_proves`);
+    }
+    if (step.what_this_does_not_prove.trim().length === 0) {
+      warnings.push(`step ${step.step_id} is missing what_this_does_not_prove`);
+    }
+    for (const link of step.evidence_links) {
+      if (!link.route.startsWith("/")) {
+        warnings.push(`step ${step.step_id} has non-route evidence link: ${link.route}`);
+      }
+    }
+  }
+
+  const sorted = [...orders].sort((a, b) => a - b);
+  if (orders.some((order, index) => order !== sorted[index])) {
+    warnings.push("steps must be sorted by order");
+  }
+  return warnings;
+}
+
+export function demoStepHonestyPair(step: DemoNarrative["steps"][number]): string {
+  return `Proves: ${step.what_this_proves} / Does not prove: ${step.what_this_does_not_prove}`;
+}
diff --git a/workbench-ui/src/app/evals/generalizationEvidenceView.test.ts b/workbench-ui/src/app/evals/generalizationEvidenceView.test.ts
new file mode 100644
index 00000000..4fe1d355
--- /dev/null
+++ b/workbench-ui/src/app/evals/generalizationEvidenceView.test.ts
@@ -0,0 +1,74 @@
+import { describe, expect, it } from "vitest";
+import type { GeneralizationAuditReportView } from "../../types/generalizationEvidence";
+import {
+  GENERALIZATION_AUDIT_BANNER,
+  generalizationGovernanceWarnings,
+  generalizationOutcomeSummary,
+  reportKindLabel,
+} from "./generalizationEvidenceView";
+
+const baseReport: GeneralizationAuditReportView = {
+  policy_version: "generalization_benchmark_policy_v1",
+  dataset: "gsm1k",
+  split: "local_audit",
+  n_items: 10,
+  correct: 4,
+  wrong: 0,
+  refused: 6,
+  unsupported: 0,
+  candidate_attempts: 3,
+  binding_failures: 2,
+  replay_refusals: 1,
+  sealed_trace_dispositions: [["sealed", 7]],
+  dominant_residual_kinds: [["missing_binding", 5]],
+  reason_codes: ["ok"],
+  source_path: "evals/generalization/reports/gsm1k.json",
+  source_digest: "sha256:abc",
+  report_kind: "committed_pin",
+  audit_only: true,
+  raw_items_exposed: false,
+};
+
+describe("generalization evidence view helpers", () => {
+  it("states the benchmark governance boundary", () => {
+    expect(GENERALIZATION_AUDIT_BANNER).toContain("Audit-only");
+    expect(GENERALIZATION_AUDIT_BANNER).toContain("No raw sealed items");
+    expect(GENERALIZATION_AUDIT_BANNER).toContain("not direct mutation targets");
+  });
+
+  it("labels report authority", () => {
+    expect(reportKindLabel(baseReport)).toBe("Committed report pin");
+    expect(reportKindLabel({ ...baseReport, report_kind: "ephemeral_local" })).toBe(
+      "Ephemeral local output",
+    );
+    expect(reportKindLabel({ ...baseReport, report_kind: "rebaseline_candidate" })).toBe(
+      "Governed rebaseline candidate",
+    );
+    expect(reportKindLabel({ ...baseReport, report_kind: "unknown" })).toBe(
+      "Unknown report authority",
+    );
+  });
+
+  it("summarizes outcomes without hiding wrong count", () => {
+    expect(generalizationOutcomeSummary(baseReport)).toBe(
+      "4 correct / 0 wrong / 6 refused / 0 unsupported",
+    );
+    expect(generalizationOutcomeSummary({ ...baseReport, wrong: 2 })).toContain("2 wrong");
+  });
+
+  it("warns when report should not be treated as canonical", () => {
+    expect(generalizationGovernanceWarnings(baseReport)).toEqual([]);
+    expect(
+      generalizationGovernanceWarnings({
+        ...baseReport,
+        report_kind: "ephemeral_local",
+        audit_only: false,
+        raw_items_exposed: true,
+      }),
+    ).toEqual([
+      "Report is not marked audit-only.",
+      "Report claims raw items are exposed; do not render item payloads.",
+      "Report is not a committed pin; do not present as canonical baseline.",
+    ]);
+  });
+});
diff --git a/workbench-ui/src/app/evals/generalizationEvidenceView.ts b/workbench-ui/src/app/evals/generalizationEvidenceView.ts
new file mode 100644
index 00000000..c5147125
--- /dev/null
+++ b/workbench-ui/src/app/evals/generalizationEvidenceView.ts
@@ -0,0 +1,36 @@
+import type { GeneralizationAuditReportView } from "../../types/generalizationEvidence";
+
+export const GENERALIZATION_AUDIT_BANNER =
+  "Audit-only. No raw sealed items are exposed here. Benchmark failures are diagnosis signals, not direct mutation targets.";
+
+export function reportKindLabel(report: GeneralizationAuditReportView): string {
+  switch (report.report_kind) {
+    case "committed_pin":
+      return "Committed report pin";
+    case "ephemeral_local":
+      return "Ephemeral local output";
+    case "rebaseline_candidate":
+      return "Governed rebaseline candidate";
+    case "unknown":
+    default:
+      return "Unknown report authority";
+  }
+}
+
+export function generalizationOutcomeSummary(report: GeneralizationAuditReportView): string {
+  return `${report.correct} correct / ${report.wrong} wrong / ${report.refused} refused / ${report.unsupported} unsupported`;
+}
+
+export function generalizationGovernanceWarnings(report: GeneralizationAuditReportView): string[] {
+  const warnings: string[] = [];
+  if (!report.audit_only) {
+    warnings.push("Report is not marked audit-only.");
+  }
+  if (report.raw_items_exposed) {
+    warnings.push("Report claims raw items are exposed; do not render item payloads.");
+  }
+  if (report.report_kind !== "committed_pin") {
+    warnings.push("Report is not a committed pin; do not present as canonical baseline.");
+  }
+  return warnings;
+}
diff --git a/workbench-ui/src/app/proposal-artifacts/proposalArtifactView.test.ts b/workbench-ui/src/app/proposal-artifacts/proposalArtifactView.test.ts
new file mode 100644
index 00000000..ce2623b7
--- /dev/null
+++ b/workbench-ui/src/app/proposal-artifacts/proposalArtifactView.test.ts
@@ -0,0 +1,83 @@
+import { describe, expect, it } from "vitest";
+import type { ProposalArtifact } from "../../types/proposalArtifact";
+import {
+  proposalArtifactWarnings,
+  proposalCapabilityLabel,
+  ratificationControlsAllowed,
+} from "./proposalArtifactView";
+
+const inspectOnly: ProposalArtifact = {
+  proposal_id: "p1",
+  subject: { kind: "construction", subject_id: "turn:1", display_name: "Construction" },
+  state: "unknown",
+  capability_level: "inspect_only",
+  source_kind: "construction_evidence",
+  proposed_change: null,
+  reasoning_trace: null,
+  evidence_pointers: [],
+  validation: null,
+  replay_evidence: null,
+  safety_report: null,
+  affected_artifacts: [],
+  handler_route: null,
+  suggested_cli: null,
+  audit_refs: [],
+  ui_disclosure: "inspect only",
+};
+
+describe("proposal artifact view helpers", () => {
+  it("disallows ratification controls for inspect-only artifacts", () => {
+    expect(ratificationControlsAllowed(inspectOnly)).toBe(false);
+    expect(proposalCapabilityLabel(inspectOnly)).toBe(
+      "Inspect-only: no mutation affordance allowed",
+    );
+  });
+
+  it("disallows ratification controls for proposal-only artifacts", () => {
+    const artifact = { ...inspectOnly, capability_level: "proposal_only" as const };
+
+    expect(ratificationControlsAllowed(artifact)).toBe(false);
+    expect(proposalCapabilityLabel(artifact)).toBe(
+      "Proposal-only: review/export/copy allowed; apply disabled",
+    );
+  });
+
+  it("allows ratification controls only with handler route", () => {
+    const artifact = {
+      ...inspectOnly,
+      capability_level: "ratification_enabled" as const,
+      handler_route: "/math-proposals/p1/ratify",
+    };
+
+    expect(ratificationControlsAllowed(artifact)).toBe(true);
+    expect(proposalCapabilityLabel(artifact)).toBe(
+      "Ratification enabled by admitted handler",
+    );
+  });
+
+  it("warns on impossible handler/capability combinations", () => {
+    expect(
+      proposalArtifactWarnings({
+        ...inspectOnly,
+        handler_route: "/invalid",
+      }),
+    ).toEqual(["Handler route must not be present without ratification authority."]);
+
+    expect(
+      proposalArtifactWarnings({
+        ...inspectOnly,
+        capability_level: "ratification_enabled",
+      }),
+    ).toEqual(["Ratification authority declared without handler route."]);
+  });
+
+  it("surfaces validation and safety blockers", () => {
+    expect(
+      proposalArtifactWarnings({
+        ...inspectOnly,
+        validation: { status: "blocked", blockers: ["missing evidence"], warnings: [] },
+        safety_report: { status: "failed", disclosures: ["handler not admitted"] },
+      }),
+    ).toEqual(["missing evidence", "handler not admitted"]);
+  });
+});
diff --git a/workbench-ui/src/app/proposal-artifacts/proposalArtifactView.ts b/workbench-ui/src/app/proposal-artifacts/proposalArtifactView.ts
new file mode 100644
index 00000000..31a679b3
--- /dev/null
+++ b/workbench-ui/src/app/proposal-artifacts/proposalArtifactView.ts
@@ -0,0 +1,36 @@
+import type { ProposalArtifact } from "../../types/proposalArtifact";
+
+export function ratificationControlsAllowed(artifact: ProposalArtifact): boolean {
+  return artifact.capability_level === "ratification_enabled" && artifact.handler_route !== null;
+}
+
+export function proposalCapabilityLabel(artifact: ProposalArtifact): string {
+  switch (artifact.capability_level) {
+    case "ratification_enabled":
+      return artifact.handler_route === null
+        ? "Ratification disabled: no handler route"
+        : "Ratification enabled by admitted handler";
+    case "proposal_only":
+      return "Proposal-only: review/export/copy allowed; apply disabled";
+    case "inspect_only":
+    default:
+      return "Inspect-only: no mutation affordance allowed";
+  }
+}
+
+export function proposalArtifactWarnings(artifact: ProposalArtifact): string[] {
+  const warnings: string[] = [];
+  if (artifact.capability_level !== "ratification_enabled" && artifact.handler_route !== null) {
+    warnings.push("Handler route must not be present without ratification authority.");
+  }
+  if (artifact.capability_level === "ratification_enabled" && artifact.handler_route === null) {
+    warnings.push("Ratification authority declared without handler route.");
+  }
+  if (artifact.validation?.status === "blocked") {
+    warnings.push(...artifact.validation.blockers);
+  }
+  if (artifact.safety_report?.status === "failed") {
+    warnings.push(...artifact.safety_report.disclosures);
+  }
+  return warnings;
+}
diff --git a/workbench-ui/src/app/trace/constructionEvidenceView.test.ts b/workbench-ui/src/app/trace/constructionEvidenceView.test.ts
new file mode 100644
index 00000000..0face1f7
--- /dev/null
+++ b/workbench-ui/src/app/trace/constructionEvidenceView.test.ts
@@ -0,0 +1,82 @@
+import { describe, expect, it } from "vitest";
+import type { ConstructionEvidence, ContractAssessmentView } from "../../types/constructionEvidence";
+import {
+  CONSTRUCTION_AUTHORITY_DISCLOSURES,
+  assessmentBlockerSummary,
+  assessmentDisposition,
+  constructionEvidenceEmptyMessage,
+  sourceSpanIsExact,
+  sourceSpanLabel,
+} from "./constructionEvidenceView";
+
+const missingEvidence: ConstructionEvidence = {
+  schema_version: "construction_evidence_v1",
+  turn_id: 1,
+  status: "missing_evidence",
+  missing_reason: "construction evidence was not persisted for this turn",
+  problem_text: null,
+  proposals: [],
+  mentions: [],
+  bindings: [],
+  bound_relations: [],
+  contract_assessments: [],
+  diagnostic_only: true,
+  serving_allowed: false,
+};
+
+const blockedAssessment: ContractAssessmentView = {
+  candidate_organ: "quantity_entity_binding_candidate.v1",
+  family_id: "binding.quantity_entity",
+  missing_bindings: ["entity"],
+  unresolved_hazards: ["ambiguous_quantity"],
+  runnable: false,
+  explanation: "missing entity binding",
+  evidence_spans: [],
+};
+
+describe("construction evidence view helpers", () => {
+  it("keeps load-bearing authority disclosures explicit", () => {
+    expect(CONSTRUCTION_AUTHORITY_DISCLOSURES).toEqual([
+      "Proposal != Runnable",
+      "Contract Determines",
+      "Diagnostic Only",
+      "Serving Disallowed",
+      "Exact Span Required",
+    ]);
+  });
+
+  it("renders missing evidence as honest absence", () => {
+    expect(constructionEvidenceEmptyMessage(missingEvidence)).toBe(
+      "construction evidence was not persisted for this turn",
+    );
+  });
+
+  it("labels source spans without normalization", () => {
+    expect(sourceSpanLabel({ start: 9, end: 10, text: "3" })).toBe("9:10 3");
+  });
+
+  it("checks exact source spans against problem text", () => {
+    const text = "Lena has 3 red marbles.";
+
+    expect(sourceSpanIsExact(text, { start: 9, end: 10, text: "3" })).toBe(true);
+    expect(sourceSpanIsExact(text, { start: 9, end: 10, text: "three" })).toBe(false);
+    expect(sourceSpanIsExact(null, { start: 9, end: 10, text: "3" })).toBe(false);
+  });
+
+  it("classifies assessments as blocked when bindings or hazards remain", () => {
+    expect(assessmentDisposition(blockedAssessment)).toBe("blocked");
+    expect(assessmentBlockerSummary(blockedAssessment)).toBe("entity, ambiguous_quantity");
+  });
+
+  it("classifies assessments as runnable only with no blockers", () => {
+    const runnable: ContractAssessmentView = {
+      ...blockedAssessment,
+      missing_bindings: [],
+      unresolved_hazards: [],
+      runnable: true,
+    };
+
+    expect(assessmentDisposition(runnable)).toBe("runnable");
+    expect(assessmentBlockerSummary(runnable)).toBe("No blockers recorded.");
+  });
+});
diff --git a/workbench-ui/src/app/trace/constructionEvidenceView.ts b/workbench-ui/src/app/trace/constructionEvidenceView.ts
new file mode 100644
index 00000000..6b8ec97e
--- /dev/null
+++ b/workbench-ui/src/app/trace/constructionEvidenceView.ts
@@ -0,0 +1,56 @@
+import type {
+  ConstructionEvidence,
+  ContractAssessmentView,
+  SourceSpanView,
+} from "../../types/constructionEvidence";
+
+export const CONSTRUCTION_AUTHORITY_DISCLOSURES = [
+  "Proposal != Runnable",
+  "Contract Determines",
+  "Diagnostic Only",
+  "Serving Disallowed",
+  "Exact Span Required",
+] as const;
+
+export function constructionEvidenceEmptyMessage(evidence: ConstructionEvidence): string | null {
+  if (evidence.status === "missing_evidence") {
+    return evidence.missing_reason ?? "No construction evidence recorded for this turn.";
+  }
+  const hasEvidence =
+    evidence.proposals.length > 0 ||
+    evidence.mentions.length > 0 ||
+    evidence.bindings.length > 0 ||
+    evidence.bound_relations.length > 0 ||
+    evidence.contract_assessments.length > 0;
+  return hasEvidence ? null : "No construction evidence recorded for this turn.";
+}
+
+export function sourceSpanLabel(span: SourceSpanView): string {
+  return `${span.start}:${span.end} ${span.text}`;
+}
+
+export function sourceSpanIsExact(problemText: string | null, span: SourceSpanView): boolean {
+  if (problemText === null) {
+    return false;
+  }
+  return (
+    span.start >= 0 &&
+    span.end >= span.start &&
+    span.end <= problemText.length &&
+    span.text.length > 0 &&
+    problemText.slice(span.start, span.end) === span.text
+  );
+}
+
+export function assessmentDisposition(assessment: ContractAssessmentView): "runnable" | "blocked" {
+  return assessment.runnable &&
+    assessment.missing_bindings.length === 0 &&
+    assessment.unresolved_hazards.length === 0
+    ? "runnable"
+    : "blocked";
+}
+
+export function assessmentBlockerSummary(assessment: ContractAssessmentView): string {
+  const blockers = [...assessment.missing_bindings, ...assessment.unresolved_hazards];
+  return blockers.length > 0 ? blockers.join(", ") : "No blockers recorded.";
+}
diff --git a/workbench-ui/src/types/constructionEvidence.ts b/workbench-ui/src/types/constructionEvidence.ts
new file mode 100644
index 00000000..7e4a0c84
--- /dev/null
+++ b/workbench-ui/src/types/constructionEvidence.ts
@@ -0,0 +1,76 @@
+export type ConstructionEvidenceStatus = "recorded" | "missing_evidence";
+
+export interface SourceSpanView {
+  start: number;
+  end: number;
+  text: string;
+}
+
+export interface RoleObligationView {
+  role: string;
+  required: boolean;
+  description: string;
+}
+
+export interface ConstructionProposalView {
+  family_id: string;
+  relation_type: string;
+  candidate_organ: string;
+  status: "proposed";
+  evidence_spans: SourceSpanView[];
+  role_obligations: RoleObligationView[];
+  diagnostic_only: boolean;
+  serving_allowed: boolean;
+}
+
+export interface MentionView {
+  mention_id: string;
+  kind: string;
+  surface: string;
+  span: SourceSpanView;
+  fact_id: string | null;
+}
+
+export interface MentionBindingView {
+  binding_type: string;
+  source_mention_id: string;
+  target_mention_id: string;
+  evidence_spans: SourceSpanView[];
+}
+
+export interface BoundRelationRoleView {
+  role: string;
+  target_id: string;
+  evidence_spans: SourceSpanView[];
+}
+
+export interface BoundRelationView {
+  relation_type: string;
+  roles: BoundRelationRoleView[];
+  evidence_spans: SourceSpanView[];
+}
+
+export interface ContractAssessmentView {
+  candidate_organ: string;
+  family_id: string | null;
+  missing_bindings: string[];
+  unresolved_hazards: string[];
+  runnable: boolean;
+  explanation: string;
+  evidence_spans: SourceSpanView[];
+}
+
+export interface ConstructionEvidence {
+  schema_version: "construction_evidence_v1";
+  turn_id: number;
+  status: ConstructionEvidenceStatus;
+  missing_reason: string | null;
+  problem_text: string | null;
+  proposals: ConstructionProposalView[];
+  mentions: MentionView[];
+  bindings: MentionBindingView[];
+  bound_relations: BoundRelationView[];
+  contract_assessments: ContractAssessmentView[];
+  diagnostic_only: boolean;
+  serving_allowed: boolean;
+}
diff --git a/workbench-ui/src/types/demoNarrative.ts b/workbench-ui/src/types/demoNarrative.ts
new file mode 100644
index 00000000..1623f2da
--- /dev/null
+++ b/workbench-ui/src/types/demoNarrative.ts
@@ -0,0 +1,28 @@
+export type DemoStepKind = "intro" | "evidence" | "replay" | "proposal" | "audit" | "payoff";
+
+export interface DemoEvidenceLink {
+  label: string;
+  route: string;
+  artifact_id: string | null;
+  digest: string | null;
+  reproducer: string | null;
+}
+
+export interface DemoNarrativeStep {
+  step_id: string;
+  order: number;
+  kind: DemoStepKind;
+  title: string;
+  claim: string;
+  what_this_proves: string;
+  what_this_does_not_prove: string;
+  evidence_links: DemoEvidenceLink[];
+  failure_mode: string | null;
+}
+
+export interface DemoNarrative {
+  narrative_id: string;
+  title: string;
+  summary: string;
+  steps: DemoNarrativeStep[];
+}
diff --git a/workbench-ui/src/types/generalizationEvidence.ts b/workbench-ui/src/types/generalizationEvidence.ts
new file mode 100644
index 00000000..83672228
--- /dev/null
+++ b/workbench-ui/src/types/generalizationEvidence.ts
@@ -0,0 +1,46 @@
+export type ChecksumStatus = "verified" | "missing" | "mismatch" | "unknown";
+export type GeneralizationReportKind =
+  | "committed_pin"
+  | "ephemeral_local"
+  | "rebaseline_candidate"
+  | "unknown";
+
+export interface GeneralizationManifestSummary {
+  dataset: string;
+  manifest_path: string;
+  split_names: string[];
+  license: string | null;
+  checksum_status: ChecksumStatus;
+  sealed_splits: string[];
+  policy_version: string;
+}
+
+export interface GeneralizationCacheStatus {
+  dataset: string;
+  cache_path: string;
+  present: boolean;
+  verified: boolean;
+  reason: string | null;
+}
+
+export interface GeneralizationAuditReportView {
+  policy_version: string;
+  dataset: string;
+  split: string;
+  n_items: number;
+  correct: number;
+  wrong: number;
+  refused: number;
+  unsupported: number;
+  candidate_attempts: number;
+  binding_failures: number;
+  replay_refusals: number;
+  sealed_trace_dispositions: [string, number][];
+  dominant_residual_kinds: [string, number][];
+  reason_codes: string[];
+  source_path: string | null;
+  source_digest: string | null;
+  report_kind: GeneralizationReportKind;
+  audit_only: boolean;
+  raw_items_exposed: boolean;
+}
diff --git a/workbench-ui/src/types/proposalArtifact.ts b/workbench-ui/src/types/proposalArtifact.ts
new file mode 100644
index 00000000..864a450f
--- /dev/null
+++ b/workbench-ui/src/types/proposalArtifact.ts
@@ -0,0 +1,55 @@
+export type ProposalCapabilityLevel =
+  | "inspect_only"
+  | "proposal_only"
+  | "ratification_enabled";
+
+export type ProposalArtifactState =
+  | "pending"
+  | "accepted"
+  | "rejected"
+  | "withdrawn"
+  | "deferred"
+  | "unknown";
+
+export interface ProposalSubject {
+  kind: string;
+  subject_id: string;
+  display_name: string;
+}
+
+export interface EvidencePointer {
+  kind: string;
+  ref: string;
+  label: string;
+  digest: string | null;
+}
+
+export interface ProposalValidationReport {
+  status: "valid" | "blocked" | "unknown";
+  blockers: string[];
+  warnings: string[];
+}
+
+export interface ProposalSafetyReport {
+  status: "clear" | "warning" | "failed" | "unknown";
+  disclosures: string[];
+}
+
+export interface ProposalArtifact {
+  proposal_id: string;
+  subject: ProposalSubject;
+  state: ProposalArtifactState;
+  capability_level: ProposalCapabilityLevel;
+  source_kind: string;
+  proposed_change: unknown;
+  reasoning_trace: unknown;
+  evidence_pointers: EvidencePointer[];
+  validation: ProposalValidationReport | null;
+  replay_evidence: unknown;
+  safety_report: ProposalSafetyReport | null;
+  affected_artifacts: EvidencePointer[];
+  handler_route: string | null;
+  suggested_cli: string | null;
+  audit_refs: EvidencePointer[];
+  ui_disclosure: string;
+}
diff --git a/workbench/construction_evidence.py b/workbench/construction_evidence.py
new file mode 100644
index 00000000..4eaa6823
--- /dev/null
+++ b/workbench/construction_evidence.py
@@ -0,0 +1,185 @@
+"""Read-only construction evidence projection helpers for Workbench.
+
+This module is intentionally inert: it defines the Workbench-facing construction
+read model and the honest missing-evidence constructor for legacy turns. It does
+not parse problem text, execute candidate operators, run replay, mutate journals,
+or grant serving authority.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Any, Literal
+
+PipelineEvidenceStatus = Literal["recorded", "missing_evidence"]
+CONSTRUCTION_EVIDENCE_ABSENT = "construction evidence was not persisted for this turn"
+
+
+@dataclass(frozen=True, slots=True)
+class SourceSpanView:
+    """Exact source span projected to the Workbench.
+
+    The caller owns validation against the source string. This record must not be
+    normalized or repaired by the UI.
+    """
+
+    start: int
+    end: int
+    text: str
+
+
+@dataclass(frozen=True, slots=True)
+class RoleObligationView:
+    role: str
+    required: bool
+    description: str
+
+
+@dataclass(frozen=True, slots=True)
+class ConstructionProposalView:
+    """Diagnostic construction proposal.
+
+    A proposal is a hypothesis only. Runnable/refused authority belongs to the
+    corresponding ContractAssessmentView.
+    """
+
+    family_id: str
+    relation_type: str
+    candidate_organ: str
+    status: Literal["proposed"]
+    evidence_spans: list[SourceSpanView] = field(default_factory=list)
+    role_obligations: list[RoleObligationView] = field(default_factory=list)
+    diagnostic_only: bool = True
+    serving_allowed: bool = False
+
+
+@dataclass(frozen=True, slots=True)
+class MentionView:
+    mention_id: str
+    kind: str
+    surface: str
+    span: SourceSpanView
+    fact_id: str | None = None
+
+
+@dataclass(frozen=True, slots=True)
+class MentionBindingView:
+    binding_type: str
+    source_mention_id: str
+    target_mention_id: str
+    evidence_spans: list[SourceSpanView] = field(default_factory=list)
+
+
+@dataclass(frozen=True, slots=True)
+class BoundRelationRoleView:
+    role: str
+    target_id: str
+    evidence_spans: list[SourceSpanView] = field(default_factory=list)
+
+
+@dataclass(frozen=True, slots=True)
+class BoundRelationView:
+    relation_type: str
+    roles: list[BoundRelationRoleView] = field(default_factory=list)
+    evidence_spans: list[SourceSpanView] = field(default_factory=list)
+
+
+@dataclass(frozen=True, slots=True)
+class ContractAssessmentView:
+    """Read-only projection of generate.problem_frame_contracts.ContractAssessment."""
+
+    candidate_organ: str
+    family_id: str | None
+    missing_bindings: list[str] = field(default_factory=list)
+    unresolved_hazards: list[str] = field(default_factory=list)
+    runnable: bool = False
+    explanation: str = ""
+    evidence_spans: list[SourceSpanView] = field(default_factory=list)
+
+
+@dataclass(frozen=True, slots=True)
+class ConstructionEvidence:
+    """Workbench-facing construction evidence for one turn.
+
+    This record is a projection, not an executor. `diagnostic_only=True` and
+    `serving_allowed=False` are load-bearing disclosure fields.
+    """
+
+    schema_version: Literal["construction_evidence_v1"]
+    turn_id: int
+    status: PipelineEvidenceStatus
+    missing_reason: str | None
+    problem_text: str | None
+    proposals: list[ConstructionProposalView] = field(default_factory=list)
+    mentions: list[MentionView] = field(default_factory=list)
+    bindings: list[MentionBindingView] = field(default_factory=list)
+    bound_relations: list[BoundRelationView] = field(default_factory=list)
+    contract_assessments: list[ContractAssessmentView] = field(default_factory=list)
+    diagnostic_only: bool = True
+    serving_allowed: bool = False
+
+
+def missing_construction_evidence(turn_id: int, reason: str) -> ConstructionEvidence:
+    """Return the honest absence state for legacy turns.
+
+    Absence is not an error and not a failed proof. It means the selected turn has
+    no persisted construction evidence to project.
+    """
+
+    return ConstructionEvidence(
+        schema_version="construction_evidence_v1",
+        turn_id=turn_id,
+        status="missing_evidence",
+        missing_reason=reason,
+        problem_text=None,
+        proposals=[],
+        mentions=[],
+        bindings=[],
+        bound_relations=[],
+        contract_assessments=[],
+        diagnostic_only=True,
+        serving_allowed=False,
+    )
+
+
+def construction_evidence_from_journal_entry(entry: Any) -> ConstructionEvidence:
+    """Project persisted construction evidence from a journal entry if present.
+
+    Current turn journals do not yet persist a construction evidence payload. This
+    helper is deliberately fail-closed and returns a typed missing-evidence record
+    rather than reconstructing a ProblemFrame from prose. When a later PR starts
+    persisting `construction_evidence`, this function is the narrow projection
+    seam to extend.
+    """
+
+    turn_id = int(getattr(entry, "turn_id"))
+    payload = getattr(entry, "construction_evidence", None)
+    if payload is None:
+        return missing_construction_evidence(turn_id, CONSTRUCTION_EVIDENCE_ABSENT)
+
+    if isinstance(payload, ConstructionEvidence):
+        return payload
+
+    if not isinstance(payload, dict):
+        return missing_construction_evidence(
+            turn_id,
+            "construction evidence payload has unsupported shape",
+        )
+
+    # Future-compatible but conservative: do not attempt lossy coercion. The first
+    # persistence PR should replace this with explicit field-by-field projection and
+    # exact-span validation tests.
+    return missing_construction_evidence(
+        turn_id,
+        "construction evidence payload projection is not yet admitted",
+    )
+
+
+def span_is_exact(problem_text: str, span: SourceSpanView) -> bool:
+    """Return whether a span exactly matches its source text slice."""
+
+    return (
+        0 <= span.start <= span.end <= len(problem_text)
+        and bool(span.text)
+        and problem_text[span.start : span.end] == span.text
+    )
diff --git a/workbench/demo_narrative.py b/workbench/demo_narrative.py
new file mode 100644
index 00000000..6f280d5c
--- /dev/null
+++ b/workbench/demo_narrative.py
@@ -0,0 +1,72 @@
+"""Demo narrative scaffolding for Workbench proof theater.
+
+A demo narrative is an authored path over real evidence routes. It must state both
+what a step proves and what it does not prove, so demo polish cannot outrun
+substrate evidence.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Literal
+
+DemoStepKind = Literal["intro", "evidence", "replay", "proposal", "audit", "payoff"]
+
+
+@dataclass(frozen=True, slots=True)
+class DemoEvidenceLink:
+    label: str
+    route: str
+    artifact_id: str | None = None
+    digest: str | None = None
+    reproducer: str | None = None
+
+
+@dataclass(frozen=True, slots=True)
+class DemoNarrativeStep:
+    step_id: str
+    order: int
+    kind: DemoStepKind
+    title: str
+    claim: str
+    what_this_proves: str
+    what_this_does_not_prove: str
+    evidence_links: list[DemoEvidenceLink] = field(default_factory=list)
+    failure_mode: str | None = None
+
+
+@dataclass(frozen=True, slots=True)
+class DemoNarrative:
+    narrative_id: str
+    title: str
+    summary: str
+    steps: list[DemoNarrativeStep] = field(default_factory=list)
+
+
+def validate_demo_narrative(narrative: DemoNarrative) -> list[str]:
+    """Return validation blockers for a Workbench demo narrative."""
+
+    blockers: list[str] = []
+    seen: set[str] = set()
+    for step in narrative.steps:
+        if step.step_id in seen:
+            blockers.append(f"duplicate step_id: {step.step_id}")
+        seen.add(step.step_id)
+        if not step.what_this_proves.strip():
+            blockers.append(f"step {step.step_id} is missing what_this_proves")
+        if not step.what_this_does_not_prove.strip():
+            blockers.append(f"step {step.step_id} is missing what_this_does_not_prove")
+        for link in step.evidence_links:
+            if not link.route.startswith("/"):
+                blockers.append(f"step {step.step_id} has non-route evidence link: {link.route}")
+    orders = [step.order for step in narrative.steps]
+    if orders != sorted(orders):
+        blockers.append("steps must be sorted by order")
+    return blockers
+
+
+def demo_partner_blurb() -> str:
+    return (
+        "A frontier model can propose. CORE can govern. Workbench can prove what "
+        "happened, what was refused, what replayed, and what remains only a proposal."
+    )
diff --git a/workbench/generalization_evidence.py b/workbench/generalization_evidence.py
new file mode 100644
index 00000000..8de197a2
--- /dev/null
+++ b/workbench/generalization_evidence.py
@@ -0,0 +1,144 @@
+"""Read-only generalization audit evidence projections for Workbench.
+
+Generalization benchmark data is audit/test-only. This module deliberately models
+aggregate report metadata only. It must not expose raw prompt/question/answer
+content, sealed item payloads, or direct patch suggestions.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Any, Literal
+
+ChecksumStatus = Literal["verified", "missing", "mismatch", "unknown"]
+ReportKind = Literal["committed_pin", "ephemeral_local", "rebaseline_candidate", "unknown"]
+
+FORBIDDEN_RAW_ITEM_KEYS = frozenset(
+    {
+        "prompt",
+        "question",
+        "answer",
+        "gold_answer",
+        "raw_item",
+        "raw_items",
+        "items",
+        "examples",
+        "sealed_items",
+    }
+)
+
+
+@dataclass(frozen=True, slots=True)
+class GeneralizationManifestSummary:
+    dataset: str
+    manifest_path: str
+    split_names: list[str]
+    license: str | None
+    checksum_status: ChecksumStatus
+    sealed_splits: list[str]
+    policy_version: str
+
+
+@dataclass(frozen=True, slots=True)
+class GeneralizationCacheStatus:
+    dataset: str
+    cache_path: str
+    present: bool
+    verified: bool
+    reason: str | None
+
+
+@dataclass(frozen=True, slots=True)
+class GeneralizationAuditReportView:
+    policy_version: str
+    dataset: str
+    split: str
+    n_items: int
+    correct: int
+    wrong: int
+    refused: int
+    unsupported: int
+    candidate_attempts: int
+    binding_failures: int
+    replay_refusals: int
+    sealed_trace_dispositions: list[tuple[str, int]] = field(default_factory=list)
+    dominant_residual_kinds: list[tuple[str, int]] = field(default_factory=list)
+    reason_codes: list[str] = field(default_factory=list)
+    source_path: str | None = None
+    source_digest: str | None = None
+    report_kind: ReportKind = "unknown"
+    audit_only: bool = True
+    raw_items_exposed: bool = False
+
+
+def contains_forbidden_raw_item_keys(payload: Any) -> bool:
+    """Return True if a payload contains raw/sealed item keys anywhere."""
+
+    if isinstance(payload, dict):
+        for key, value in payload.items():
+            if str(key) in FORBIDDEN_RAW_ITEM_KEYS:
+                return True
+            if contains_forbidden_raw_item_keys(value):
+                return True
+    elif isinstance(payload, list):
+        return any(contains_forbidden_raw_item_keys(item) for item in payload)
+    return False
+
+
+def _count_pairs(value: Any) -> list[tuple[str, int]]:
+    if not isinstance(value, dict):
+        return []
+    pairs: list[tuple[str, int]] = []
+    for key, count in sorted(value.items(), key=lambda item: str(item[0])):
+        try:
+            pairs.append((str(key), int(count)))
+        except (TypeError, ValueError):
+            continue
+    return pairs
+
+
+def generalization_report_view_from_payload(
+    payload: dict[str, Any],
+    *,
+    source_path: str | None = None,
+    source_digest: str | None = None,
+    report_kind: ReportKind = "unknown",
+) -> GeneralizationAuditReportView:
+    """Project an aggregate audit report into a Workbench-safe view.
+
+    This function is intentionally aggregate-only. It rejects payloads that carry
+    obvious raw/sealed item fields so the Workbench cannot accidentally render
+    benchmark examples or answers.
+    """
+
+    if contains_forbidden_raw_item_keys(payload):
+        raise ValueError("generalization report payload exposes raw item fields")
+
+    return GeneralizationAuditReportView(
+        policy_version=str(payload.get("policy_version") or "unknown"),
+        dataset=str(payload.get("dataset") or "unknown"),
+        split=str(payload.get("split") or "unknown"),
+        n_items=int(payload.get("n_items") or 0),
+        correct=int(payload.get("correct") or 0),
+        wrong=int(payload.get("wrong") or 0),
+        refused=int(payload.get("refused") or 0),
+        unsupported=int(payload.get("unsupported") or 0),
+        candidate_attempts=int(payload.get("candidate_attempts") or 0),
+        binding_failures=int(payload.get("binding_failures") or 0),
+        replay_refusals=int(payload.get("replay_refusals") or 0),
+        sealed_trace_dispositions=_count_pairs(payload.get("sealed_trace_dispositions")),
+        dominant_residual_kinds=_count_pairs(payload.get("dominant_residual_kinds")),
+        reason_codes=[str(code) for code in payload.get("reason_codes") or []],
+        source_path=source_path,
+        source_digest=source_digest,
+        report_kind=report_kind,
+        audit_only=True,
+        raw_items_exposed=False,
+    )
+
+
+def generalization_audit_banner() -> str:
+    return (
+        "Audit-only. No raw sealed items are exposed here. Benchmark failures are "
+        "diagnosis signals, not direct mutation targets."
+    )
diff --git a/workbench/proposal_artifact.py b/workbench/proposal_artifact.py
new file mode 100644
index 00000000..72771c6f
--- /dev/null
+++ b/workbench/proposal_artifact.py
@@ -0,0 +1,122 @@
+"""ProposalArtifact authority scaffolding for Workbench.
+
+This module defines a shared proposal-review envelope without admitting any new
+ratification handler. It is safe, inert UI/read-model substrate: capability level
+controls what the Workbench may display as an affordance.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Any, Literal
+
+ProposalCapabilityLevel = Literal[
+    "inspect_only",
+    "proposal_only",
+    "ratification_enabled",
+]
+
+ProposalArtifactState = Literal[
+    "pending",
+    "accepted",
+    "rejected",
+    "withdrawn",
+    "deferred",
+    "unknown",
+]
+
+
+@dataclass(frozen=True, slots=True)
+class ProposalSubject:
+    kind: str
+    subject_id: str
+    display_name: str
+
+
+@dataclass(frozen=True, slots=True)
+class EvidencePointer:
+    kind: str
+    ref: str
+    label: str
+    digest: str | None = None
+
+
+@dataclass(frozen=True, slots=True)
+class ProposalValidationReport:
+    status: Literal["valid", "blocked", "unknown"]
+    blockers: list[str] = field(default_factory=list)
+    warnings: list[str] = field(default_factory=list)
+
+
+@dataclass(frozen=True, slots=True)
+class ProposalSafetyReport:
+    status: Literal["clear", "warning", "failed", "unknown"]
+    disclosures: list[str] = field(default_factory=list)
+
+
+@dataclass(frozen=True, slots=True)
+class ProposalArtifact:
+    proposal_id: str
+    subject: ProposalSubject
+    state: ProposalArtifactState
+    capability_level: ProposalCapabilityLevel
+    source_kind: str
+    proposed_change: Any = None
+    reasoning_trace: Any = None
+    evidence_pointers: list[EvidencePointer] = field(default_factory=list)
+    validation: ProposalValidationReport | None = None
+    replay_evidence: Any = None
+    safety_report: ProposalSafetyReport | None = None
+    affected_artifacts: list[EvidencePointer] = field(default_factory=list)
+    handler_route: str | None = None
+    suggested_cli: str | None = None
+    audit_refs: list[EvidencePointer] = field(default_factory=list)
+    ui_disclosure: str = "Proposal artifact is inspect-only unless an admitted handler exists."
+
+
+def ratification_affordance_allowed(artifact: ProposalArtifact) -> bool:
+    """Return whether UI may show ratify/reject/defer controls."""
+
+    return artifact.capability_level == "ratification_enabled" and bool(
+        artifact.handler_route
+    )
+
+
+def capability_disclosure(artifact: ProposalArtifact) -> str:
+    if artifact.capability_level == "ratification_enabled":
+        if artifact.handler_route:
+            return "Ratification controls may render through the admitted handler route."
+        return "Ratification is disabled because no handler route is present."
+    if artifact.capability_level == "proposal_only":
+        return "Proposal-only artifact: review/export/copy are allowed; apply is not."
+    return "Inspect-only artifact: no apply, ratify, promote, or mutation affordance is allowed."
+
+
+def proposal_artifact_from_minimal(
+    *,
+    proposal_id: str,
+    subject_kind: str,
+    subject_id: str,
+    display_name: str,
+    source_kind: str,
+    capability_level: ProposalCapabilityLevel = "inspect_only",
+    state: ProposalArtifactState = "unknown",
+    handler_route: str | None = None,
+) -> ProposalArtifact:
+    """Build a minimal shared proposal review envelope."""
+
+    artifact = ProposalArtifact(
+        proposal_id=proposal_id,
+        subject=ProposalSubject(
+            kind=subject_kind,
+            subject_id=subject_id,
+            display_name=display_name,
+        ),
+        state=state,
+        capability_level=capability_level,
+        source_kind=source_kind,
+        handler_route=handler_route,
+    )
+    if capability_level != "ratification_enabled" and handler_route is not None:
+        raise ValueError("handler_route requires ratification_enabled capability")
+    return artifact