feat(continuation): formalize continuation proofs for claim and push (closes #189)

Extend #188 continuation mode with issue claim status evidence,
force-with-lease push reporting, canonical secret sweep helper, and
composite final-report checks wired into assess_issue_selection_final_report.

tests/test_review_proofs.py

@@ -28,6 +28,9 @@ from review_proofs import (  # noqa: E402
     assess_capability_proof,
     assess_contradictory_no_pr_claim,
     assess_continuation_mode_report,
+    assess_force_with_lease_push_report,
+    canonical_secret_sweep_report,
+    CANONICAL_SECRET_SWEEP_COMMAND,
     assess_controller_handoff,
     assess_edited_pr_inventory_coverage,
     assess_empty_queue_report,
@@ -1761,6 +1764,7 @@ class TestIssueSelectionContinuation(unittest.TestCase):
             "- Continuation mode: issue #182 continuation",
             "- Existing PR: #186",
             "- PR author: jcwalker3",
+            "- Issue claim status: status:in-progress",
             "- Branch: feat/issue-182-controller-handoff",
             f"- Old PR head: {self.OLD_SHA}",
             f"- New PR head: {self.NEW_SHA}",
@@ -1773,6 +1777,8 @@ class TestIssueSelectionContinuation(unittest.TestCase):
             continuation_proof={
                 "pr_number": 186,
                 "pr_author": "jcwalker3",
+                "issue_number": 182,
+                "issue_claim_status": "status:in-progress",
                 "branch": "feat/issue-182-controller-handoff",
                 "old_head_sha": self.OLD_SHA,
                 "new_head_sha": self.NEW_SHA,
@@ -1785,5 +1791,136 @@ class TestIssueSelectionContinuation(unittest.TestCase):
         self.assertEqual(result["grade"], "A")
 
 
+class TestContinuationModeProofs(unittest.TestCase):
+    """Issue #189: formal continuation proofs beyond #188 selection wall."""
+
+    OLD_SHA = PINNED
+    NEW_SHA = OTHER
+    REMOTE_OLD = "601c608c00000000000000000000000000000000"
+    LEASE_SHA = "45c5cac2bc49dd112766ea218b18a71e9c5f8e99"
+    PUSHED_SHA = "45c5cac2bc49dd112766ea218b18a71e9c5f8e99"
+
+    def test_force_with_lease_requires_lease_evidence(self):
+        report = (
+            "Issue #182 continuation. force-with-lease push to "
+            "feat/issue-182-controller-handoff-enforcement."
+        )
+        result = assess_force_with_lease_push_report(
+            report,
+            old_remote_head=self.REMOTE_OLD,
+            expected_lease_head=self.LEASE_SHA,
+            new_pushed_head=self.PUSHED_SHA,
+            branch_pushed="feat/issue-182-controller-handoff-enforcement",
+            used_force_with_lease=True,
+        )
+        self.assertTrue(result["downgraded"])
+
+    def test_force_with_lease_complete_with_full_evidence(self):
+        report = (
+            "Issue #182 continuation with git push --force-with-lease. "
+            f"Old remote head {self.REMOTE_OLD}. "
+            f"Lease head {self.LEASE_SHA}. "
+            f"Pushed head {self.PUSHED_SHA}. "
+            "Branch feat/issue-182-controller-handoff-enforcement. "
+            "Push branch only: only the feature branch was pushed."
+        )
+        result = assess_force_with_lease_push_report(
+            report,
+            old_remote_head=self.REMOTE_OLD,
+            expected_lease_head=self.LEASE_SHA,
+            new_pushed_head=self.PUSHED_SHA,
+            branch_pushed="feat/issue-182-controller-handoff-enforcement",
+            used_force_with_lease=True,
+        )
+        self.assertTrue(result["complete"])
+
+    def test_continuation_requires_issue_claim_status(self):
+        report = (
+            "Issue #182 continuation mode. PR #186. "
+            f"old head {self.OLD_SHA} new head {self.NEW_SHA}. "
+            "PR author jcwalker3. Branch feat/issue-182-test."
+        )
+        result = assess_continuation_mode_report(
+            report,
+            pr_number=186,
+            pr_author="jcwalker3",
+            issue_number=182,
+            issue_claim_status="status:in-progress",
+            branch="feat/issue-182-test",
+            old_head_sha=self.OLD_SHA,
+            new_head_sha=self.NEW_SHA,
+        )
+        self.assertTrue(result["downgraded"])
+
+    def test_canonical_secret_sweep_helper(self):
+        sweep = canonical_secret_sweep_report(clean=True)
+        self.assertEqual(sweep["method"], CANONICAL_SECRET_SWEEP_COMMAND)
+        self.assertTrue(sweep["clean"])
+
+    def test_continuation_final_report_with_push_and_sweep_earns_a(self):
+        branch = "feat/issue-182-controller-handoff-enforcement"
+        report = "\n".join([
+            "Issue #182 continuation mode — status:in-progress already set.",
+            f"PR #186 updated via git push --force-with-lease.",
+            f"Old PR head {self.OLD_SHA}; new PR head {self.NEW_SHA}.",
+            f"Old remote head {self.REMOTE_OLD}.",
+            f"Lease head {self.LEASE_SHA}. Pushed head {self.PUSHED_SHA}.",
+            f"Branch {branch}. Push branch only: only the feature branch.",
+            "PR author: jcwalker3. Session authored PR: yes.",
+            "Continuation allowed: operator requested rebase.",
+            "Open PR inventory included PR #186.",
+            "## Controller Handoff",
+            "- Task: continuation",
+            "- Repo: Scaled-Tech-Consulting/Gitea-Tools",
+            "- Role: author",
+            "- Identity: prgs-author",
+            "- Issue/PR: #182 / PR #186",
+            f"- Branch/SHA: {branch}",
+            "- Files changed: review_proofs.py",
+            "- Validation: tests passed",
+            "- Mutations: push_branch",
+            "- Workspace mutations: none",
+            "- Current status: PR mergeable",
+            "- Blockers: none",
+            "- Next: review",
+            "- Safety: no review/merge",
+            "- Continuation mode: issue #182 continuation",
+            "- Existing PR: #186",
+            "- PR author: jcwalker3",
+            "- Issue claim status: status:in-progress",
+            f"- Branch: {branch}",
+            f"- Old PR head: {self.OLD_SHA}",
+            f"- New PR head: {self.NEW_SHA}",
+            "- Session authored PR: yes",
+            "- Why continuation allowed: operator requested rebase",
+        ])
+        result = assess_issue_selection_final_report(
+            report,
+            mode="continuation",
+            continuation_proof={
+                "pr_number": 186,
+                "pr_author": "jcwalker3",
+                "issue_number": 182,
+                "issue_claim_status": "status:in-progress",
+                "branch": branch,
+                "old_head_sha": self.OLD_SHA,
+                "new_head_sha": self.NEW_SHA,
+                "session_authored_pr": True,
+                "continuation_allowed_reason": "operator requested rebase",
+                "push_proof": {
+                    "old_remote_head": self.REMOTE_OLD,
+                    "expected_lease_head": self.LEASE_SHA,
+                    "new_pushed_head": self.PUSHED_SHA,
+                    "branch_pushed": branch,
+                    "used_force_with_lease": True,
+                },
+                "secret_sweep": canonical_secret_sweep_report(clean=True),
+            },
+            edited_pr_numbers=[186],
+            inventoried_pr_numbers=[186],
+        )
+        self.assertEqual(result["grade"], "A")
+
+
 if __name__ == "__main__":
     unittest.main()