diff --git a/app/(app)/create/CreateFlowLayoutClient.tsx b/app/(app)/create/CreateFlowLayoutClient.tsx
index 60a816b..ad67618 100644
--- a/app/(app)/create/CreateFlowLayoutClient.tsx
+++ b/app/(app)/create/CreateFlowLayoutClient.tsx
@@ -32,6 +32,8 @@ import {
   clearAnonymousCreateFlowStorage,
   setTransferPendingFlag,
 } from "./utils/anonymousDraftStorage";
+import { createFlowStateFromPublishedRule } from "../../../lib/create/publishedDocumentToCreateFlowState";
+import { readLastPublishedRule } from "../../../lib/create/lastPublishedRule";
 import { deleteServerDraft } from "../../../lib/create/api";
 import messages from "../../../messages/en/index";
 import {
@@ -133,12 +135,23 @@ function CreateFlowLayoutContent({
   const [communitySaveMagicLinkSuccess, setCommunitySaveMagicLinkSuccess] =
     useState(false);
 
+  const loginReturnPath =
+    currentStep === "edit-rule"
+      ? "/create/edit-rule?syncDraft=1"
+      : "/create/final-review?syncDraft=1";
+
   const {
     publishBannerMessage,
     setPublishBannerMessage,
     isPublishing,
     finalize: handleFinalize,
-  } = useCreateFlowFinalize({ state, router, openLogin });
+  } = useCreateFlowFinalize({
+    state,
+    router,
+    openLogin,
+    updateState,
+    loginReturnPath,
+  });
 
   const {
     isTemplateReviewRoute,
@@ -221,6 +234,34 @@ function CreateFlowLayoutContent({
     }
   }, [currentStep]);
 
+  useEffect(() => {
+    if (currentStep !== "edit-rule") return;
+    const last = readLastPublishedRule();
+    if (!last) {
+      router.replace("/create/completed");
+      return;
+    }
+    const editingId = state.editingPublishedRuleId?.trim() ?? "";
+    if (editingId.length > 0 && editingId !== last.id) {
+      router.replace("/create/completed");
+      return;
+    }
+    const titleOk =
+      typeof state.title === "string" && state.title.trim().length > 0;
+    const sectionsClear = (state.sections?.length ?? 0) === 0;
+    /** Stale template `sections` (e.g. Values-only) makes final-review rows wrong; re-hydrate until cleared. */
+    if (titleOk && editingId === last.id && sectionsClear) {
+      return;
+    }
+    updateState(createFlowStateFromPublishedRule(last));
+  }, [
+    currentStep,
+    router,
+    updateState,
+    state.editingPublishedRuleId,
+    state.title,
+  ]);
+
   const handleCommunitySaveMagicLinkSubmit = useCallback(async () => {
     setCommunitySaveMagicLinkError(null);
     setCommunitySaveMagicLinkSuccess(false);
@@ -260,7 +301,8 @@ function CreateFlowLayoutContent({
 
   const isCompletedStep = currentStep === "completed";
   const isRightRailStep = currentStep === "decision-approaches";
-  const isFinalReviewStep = currentStep === "final-review";
+  const isFinalReviewLike =
+    currentStep === "final-review" || currentStep === "edit-rule";
   const isCardLayoutStep = createFlowStepUsesCardLayout(currentStep);
   /** Two-column select / right-rail: below `lg` main scrolls; at `lg+` only the right column scrolls. */
   const isSelectSplitScrollStep =
@@ -275,7 +317,7 @@ function CreateFlowLayoutContent({
     ? "items-stretch overflow-y-auto md:overflow-hidden"
     : isSelectSplitScrollStep
       ? "items-start justify-start overflow-y-auto max-lg:overflow-y-auto lg:min-h-0 lg:items-stretch lg:overflow-hidden"
-      : isFinalReviewStep || isCardLayoutStep || isTemplateReviewRoute
+      : isFinalReviewLike || isCardLayoutStep || isTemplateReviewRoute
         ? "items-start justify-center overflow-y-auto"
         : "items-start justify-center overflow-y-auto md:items-center";
 
@@ -289,7 +331,8 @@ function CreateFlowLayoutContent({
     : "max-md:flex-col max-md:items-center";
   const mainResponsiveLayout = `${mainMaxMdCross} ${mainMaxMdJustify} md:flex-row md:justify-center`;
   const saveDraftOnExit =
-    Boolean(sessionUser) && stepIdx >= SAVE_EXIT_FROM_STEP_INDEX;
+    Boolean(sessionUser) &&
+    (stepIdx >= SAVE_EXIT_FROM_STEP_INDEX || currentStep === "edit-rule");
 
   const proportionBarProgress = getProportionBarProgressForCreateFlowStep(
     currentStep,
@@ -408,7 +451,15 @@ function CreateFlowLayoutContent({
         saveDraftOnExit={saveDraftOnExit}
         onEdit={
           isCompletedStep
-            ? () => router.push("/create/final-review")
+            ? () => {
+                const last = readLastPublishedRule();
+                if (!last) return;
+                updateState({
+                  editingPublishedRuleId: last.id,
+                  sections: [],
+                });
+                router.push("/create/edit-rule");
+              }
             : undefined
         }
         onExit={(opts) => void handleExit(opts)}
@@ -425,7 +476,7 @@ function CreateFlowLayoutContent({
       {!isCompletedStep && (
         <CreateFlowFooter
           className="shrink-0"
-          progressBar={!isTemplateReviewRoute && !isFinalReviewStep}
+          progressBar={!isTemplateReviewRoute && !isFinalReviewLike}
           proportionBarProgress={proportionBarProgress}
           proportionBarVariant="segmented"
           secondButton={
@@ -555,7 +606,7 @@ function CreateFlowLayoutContent({
               >
                 {footer[customRuleConfirmFooter.footerMessageKey]}
               </Button>
-            ) : nextStep ? (
+            ) : nextStep || isFinalReviewLike ? (
               <Button
                 buttonType="filled"
                 palette="default"
@@ -563,14 +614,14 @@ function CreateFlowLayoutContent({
                 disabled={isPublishing}
                 className={CREATE_FLOW_FOOTER_BUTTON_CLASS}
                 onClick={() => {
-                  if (currentStep === "final-review") {
+                  if (isFinalReviewLike) {
                     void handleFinalize();
                   } else {
                     goToNextStep();
                   }
                 }}
               >
-                {currentStep === "final-review"
+                {isFinalReviewLike
                   ? isPublishing
                     ? messages.create.reviewAndComplete.publish
                         .finalizeButtonPublishing
diff --git a/app/(app)/create/components/FinalReviewCommunityContextEditModal.tsx b/app/(app)/create/components/FinalReviewCommunityContextEditModal.tsx
new file mode 100644
index 0000000..d3691df
--- /dev/null
+++ b/app/(app)/create/components/FinalReviewCommunityContextEditModal.tsx
@@ -0,0 +1,111 @@
+"use client";
+
+/**
+ * Edit published rule: community description with the same 200-char limit as
+ * {@link CreateFlowScreenView} `community-context` step.
+ */
+
+import { useEffect, useMemo, useRef, useState } from "react";
+import Create from "../../../components/modals/Create";
+import TextInput from "../../../components/controls/TextInput";
+import ContentLockup from "../../../components/type/ContentLockup";
+import { useTranslation } from "../../../contexts/MessagesContext";
+
+/** Matches `community-context` step and `createFlowSchemas` communityContext.max(200). */
+export const COMMUNITY_CONTEXT_FIELD_MAX_LENGTH = 200;
+
+export interface FinalReviewCommunityContextEditModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  /** Current `communityContext` (trimmed for display; draft seeds from raw state in parent). */
+  initialValue: string;
+  onSave: (_value: string) => void;
+}
+
+export function FinalReviewCommunityContextEditModal({
+  isOpen,
+  onClose,
+  initialValue,
+  onSave,
+}: FinalReviewCommunityContextEditModalProps) {
+  const tModal = useTranslation(
+    "create.reviewAndComplete.finalReview.communityContextEditModal",
+  );
+  const tField = useTranslation("create.community.communityContext");
+  const tSave = useTranslation(
+    "create.reviewAndComplete.finalReview.chipEditModal",
+  );
+
+  const [draft, setDraft] = useState("");
+  const initialRef = useRef("");
+  const seededOpenRef = useRef(false);
+
+  useEffect(() => {
+    if (!isOpen) {
+      seededOpenRef.current = false;
+      return;
+    }
+    if (seededOpenRef.current) return;
+    seededOpenRef.current = true;
+    const seed = initialValue;
+    setDraft(seed);
+    initialRef.current = seed;
+  }, [isOpen, initialValue]);
+
+  const isDirty = useMemo(
+    () => draft !== initialRef.current,
+    [draft],
+  );
+
+  const characterHint = tField("characterCountTemplate")
+    .replace("{current}", String(draft.length))
+    .replace("{max}", String(COMMUNITY_CONTEXT_FIELD_MAX_LENGTH));
+
+  const handleSave = () => {
+    if (!isDirty) return;
+    const trimmed = draft.trimEnd();
+    const capped = trimmed.slice(0, COMMUNITY_CONTEXT_FIELD_MAX_LENGTH);
+    onSave(capped);
+    onClose();
+  };
+
+  return (
+    <Create
+      isOpen={isOpen}
+      onClose={onClose}
+      backdropVariant="blurredYellow"
+      headerContent={
+        <div className="bg-[var(--color-surface-default-primary)] px-[24px] py-[12px] shrink-0">
+          <ContentLockup
+            title={tModal("title")}
+            description={tModal("description")}
+            variant="modal"
+            alignment="left"
+          />
+        </div>
+      }
+      showBackButton={false}
+      showNextButton
+      nextButtonText={tSave("saveButton")}
+      nextButtonDisabled={!isDirty}
+      onNext={handleSave}
+      ariaLabel={tModal("title")}
+    >
+      <div className="pb-2">
+        <TextInput
+          className="!transition-none"
+          type="text"
+          placeholder={tField("placeholder")}
+          value={draft}
+          onChange={(e) => {
+            setDraft(e.target.value);
+          }}
+          inputSize="medium"
+          formHeader={false}
+          textHint={characterHint}
+          maxLength={COMMUNITY_CONTEXT_FIELD_MAX_LENGTH}
+        />
+      </div>
+    </Create>
+  );
+}
diff --git a/app/(app)/create/hooks/useCreateFlowExit.ts b/app/(app)/create/hooks/useCreateFlowExit.ts
index 02c6090..6c4b358 100644
--- a/app/(app)/create/hooks/useCreateFlowExit.ts
+++ b/app/(app)/create/hooks/useCreateFlowExit.ts
@@ -2,7 +2,13 @@
 
 import { useCallback } from "react";
 import type { CreateFlowState, CreateFlowStep } from "../types";
-import { saveDraftToServer } from "../../../../lib/create/api";
+import { buildPublishPayload } from "../../../../lib/create/buildPublishPayload";
+import {
+  deleteServerDraft,
+  saveDraftToServer,
+  updatePublishedRule,
+} from "../../../../lib/create/api";
+import { writeLastPublishedRule } from "../../../../lib/create/lastPublishedRule";
 import messages from "../../../../messages/en/index";
 
 const SYNC_ENABLED = process.env.NEXT_PUBLIC_ENABLE_BACKEND_SYNC === "true";
@@ -44,16 +50,52 @@ export function useCreateFlowExit({
       }
 
       if (saveDraft && SYNC_ENABLED) {
-        const payload: CreateFlowState = {
-          ...state,
-          ...(currentStep ? { currentStep } : {}),
-        };
-        const result = await saveDraftToServer(payload);
-        if (result.ok === true) {
-          setDraftSaveBannerMessage?.(null);
+        const editingId =
+          typeof state.editingPublishedRuleId === "string"
+            ? state.editingPublishedRuleId.trim()
+            : "";
+        if (editingId.length > 0) {
+          const payloadResult = buildPublishPayload(state);
+          if (payloadResult.ok === false) {
+            setDraftSaveBannerMessage?.(
+              payloadResult.error === "missingCommunityName"
+                ? messages.create.reviewAndComplete.publish
+                    .missingCommunityName
+                : payloadResult.error,
+            );
+            return;
+          }
+          const { title, summary, document } = payloadResult;
+          const updateResult = await updatePublishedRule(editingId, {
+            title,
+            summary: summary ?? null,
+            document,
+          });
+          if (updateResult.ok === true) {
+            writeLastPublishedRule({
+              id: editingId,
+              title,
+              summary: summary ?? null,
+              document,
+            });
+            setDraftSaveBannerMessage?.(null);
+            void deleteServerDraft();
+          } else {
+            setDraftSaveBannerMessage?.(updateResult.error);
+            return;
+          }
         } else {
-          setDraftSaveBannerMessage?.(result.message);
-          return;
+          const payload: CreateFlowState = {
+            ...state,
+            ...(currentStep ? { currentStep } : {}),
+          };
+          const result = await saveDraftToServer(payload);
+          if (result.ok === true) {
+            setDraftSaveBannerMessage?.(null);
+          } else {
+            setDraftSaveBannerMessage?.(result.message);
+            return;
+          }
         }
       }
 
diff --git a/app/(app)/create/hooks/useCreateFlowFinalize.ts b/app/(app)/create/hooks/useCreateFlowFinalize.ts
index 603a008..97d0384 100644
--- a/app/(app)/create/hooks/useCreateFlowFinalize.ts
+++ b/app/(app)/create/hooks/useCreateFlowFinalize.ts
@@ -2,7 +2,7 @@
 
 import { useCallback, useState } from "react";
 import { buildPublishPayload } from "../../../../lib/create/buildPublishPayload";
-import { publishRule } from "../../../../lib/create/api";
+import { publishRule, updatePublishedRule } from "../../../../lib/create/api";
 import { writeLastPublishedRule } from "../../../../lib/create/lastPublishedRule";
 import messages from "../../../../messages/en/index";
 import type { CreateFlowState } from "../types";
@@ -23,12 +23,8 @@ export type UseCreateFlowFinalizeResult = {
   isPublishing: boolean;
   /**
    * Build a publish payload from the current `CreateFlowState`, post it to
-   * `publishRule`, and route to `/create/completed` on success.
-   *
-   * Failure modes:
-   * - Payload validation fails → surface the localized banner message.
-   * - 401 from the API → re-open the login modal targeting `/create/final-review?syncDraft=1` so the user can retry post-auth.
-   * - Any other failure → show either the trimmed server message or a generic localized fallback.
+   * `publishRule` (or PATCH when editing a published rule), and route to
+   * `/create/completed` on success.
    */
   finalize: () => Promise<void>;
 };
@@ -43,10 +39,15 @@ export function useCreateFlowFinalize({
   state,
   router,
   openLogin,
+  updateState,
+  loginReturnPath,
 }: {
   state: CreateFlowState;
   router: AppRouterLike;
   openLogin: OpenLogin;
+  updateState: (_patch: Partial<CreateFlowState>) => void;
+  /** Session gate return path (`?syncDraft=1`) — differs for `/create/edit-rule` vs `/create/final-review`. */
+  loginReturnPath: string;
 }): UseCreateFlowFinalizeResult {
   const [publishBannerMessage, setPublishBannerMessage] = useState<
     string | null
@@ -66,6 +67,46 @@ export function useCreateFlowFinalize({
     }
     const { title, summary, document: ruleDocument } = payloadResult;
     setIsPublishing(true);
+
+    const editingId =
+      typeof state.editingPublishedRuleId === "string"
+        ? state.editingPublishedRuleId.trim()
+        : "";
+
+    if (editingId.length > 0) {
+      const updateResult = await updatePublishedRule(editingId, {
+        title,
+        summary: summary ?? null,
+        document: ruleDocument,
+      });
+      setIsPublishing(false);
+      if (updateResult.ok === true) {
+        writeLastPublishedRule({
+          id: editingId,
+          title,
+          summary: summary ?? null,
+          document: ruleDocument,
+        });
+        updateState({ editingPublishedRuleId: undefined });
+        router.push("/create/completed");
+        return;
+      }
+      if (updateResult.status === 401) {
+        openLogin({
+          variant: "default",
+          nextPath: loginReturnPath,
+          backdropVariant: "blurredYellow",
+        });
+        return;
+      }
+      setPublishBannerMessage(
+        updateResult.error.trim() !== ""
+          ? updateResult.error
+          : messages.create.reviewAndComplete.publish.genericPublishFailed,
+      );
+      return;
+    }
+
     const publishResult = await publishRule({
       title,
       summary,
@@ -85,7 +126,7 @@ export function useCreateFlowFinalize({
     if (publishResult.status === 401) {
       openLogin({
         variant: "default",
-        nextPath: "/create/final-review?syncDraft=1",
+        nextPath: loginReturnPath,
         backdropVariant: "blurredYellow",
       });
       return;
@@ -95,7 +136,7 @@ export function useCreateFlowFinalize({
         ? publishResult.error
         : messages.create.reviewAndComplete.publish.genericPublishFailed,
     );
-  }, [state, router, openLogin]);
+  }, [state, router, openLogin, updateState, loginReturnPath]);
 
   return {
     publishBannerMessage,
diff --git a/app/(app)/create/screens/CreateFlowScreenView.tsx b/app/(app)/create/screens/CreateFlowScreenView.tsx
index c9f0635..4ffd1f9 100644
--- a/app/(app)/create/screens/CreateFlowScreenView.tsx
+++ b/app/(app)/create/screens/CreateFlowScreenView.tsx
@@ -83,6 +83,8 @@ export function CreateFlowScreenView({
       return <ConfirmStakeholdersScreen />;
     case "final-review":
       return <FinalReviewScreen />;
+    case "edit-rule":
+      return <FinalReviewScreen variant="editPublished" />;
     case "completed":
       return <CompletedScreen />;
     default: {
diff --git a/app/(app)/create/screens/review/FinalReviewScreen.tsx b/app/(app)/create/screens/review/FinalReviewScreen.tsx
index 118be5b..c317556 100644
--- a/app/(app)/create/screens/review/FinalReviewScreen.tsx
+++ b/app/(app)/create/screens/review/FinalReviewScreen.tsx
@@ -21,6 +21,7 @@ import {
   type FinalReviewChipEditPatch,
   type FinalReviewChipEditTarget,
 } from "../../components/FinalReviewChipEditModal";
+import { FinalReviewCommunityContextEditModal } from "../../components/FinalReviewCommunityContextEditModal";
 import {
   getAssetPath,
   vectorMarkPath,
@@ -68,7 +69,11 @@ function readFallbackCategoryRows(
   };
 }
 
-export function FinalReviewScreen() {
+export function FinalReviewScreen({
+  variant = "default",
+}: {
+  variant?: "default" | "editPublished";
+} = {}) {
   const { state, updateState, markCreateFlowInteraction } = useCreateFlow();
   const mdUp = useCreateFlowMdUp();
   const t = useTranslation("create.reviewAndComplete.finalReview");
@@ -93,6 +98,8 @@ export function FinalReviewScreen() {
     useState<FinalReviewChipEditTarget | null>(null);
   const [activeReadOnlyDetail, setActiveReadOnlyDetail] =
     useState<TemplateChipDetail | null>(null);
+  const [communityContextModalOpen, setCommunityContextModalOpen] =
+    useState(false);
 
   const handleSave = useCallback(
     (patch: FinalReviewChipEditPatch) => {
@@ -180,14 +187,37 @@ export function FinalReviewScreen() {
     return raw.length > 0 ? raw : undefined;
   }, [state.communityContext]);
 
+  const rawCommunityContextForModal =
+    typeof state.communityContext === "string" ? state.communityContext : "";
+
+  const descriptionEmptyHint =
+    variant === "editPublished" ? t("communityContextEditModal.emptyHint") : undefined;
+
   return (
     <CreateFlowLockupCardStepShell
-      lockupTitle={t("title")}
-      lockupDescription={t("description")}
+      lockupTitle={
+        variant === "editPublished" ? t("editPublishedTitle") : t("title")
+      }
+      lockupDescription={
+        variant === "editPublished"
+          ? t("editPublishedDescription")
+          : t("description")
+      }
     >
       <Rule
         title={ruleCardTitle}
         description={ruleCardDescription}
+        onDescriptionClick={
+          variant === "editPublished"
+            ? () => setCommunityContextModalOpen(true)
+            : undefined
+        }
+        descriptionEmptyHint={descriptionEmptyHint}
+        descriptionEditAriaLabel={
+          variant === "editPublished"
+            ? t("communityContextEditModal.ariaEditDescription")
+            : undefined
+        }
         size={mdUp ? "L" : "M"}
         expanded={true}
         backgroundColor="bg-[#c9fef9]"
@@ -209,6 +239,17 @@ export function FinalReviewScreen() {
         onClose={() => setActiveReadOnlyDetail(null)}
         detail={activeReadOnlyDetail}
       />
+      {variant === "editPublished" ? (
+        <FinalReviewCommunityContextEditModal
+          isOpen={communityContextModalOpen}
+          onClose={() => setCommunityContextModalOpen(false)}
+          initialValue={rawCommunityContextForModal}
+          onSave={(value) => {
+            markCreateFlowInteraction();
+            updateState({ communityContext: value, summary: value });
+          }}
+        />
+      ) : null}
     </CreateFlowLockupCardStepShell>
   );
 }
diff --git a/app/(app)/create/types.ts b/app/(app)/create/types.ts
index f65ed77..9e95676 100644
--- a/app/(app)/create/types.ts
+++ b/app/(app)/create/types.ts
@@ -25,6 +25,8 @@ export type CreateFlowStep =
   | "conflict-management"
   | "confirm-stakeholders"
   | "final-review"
+  /** Branch-only URL: same UI as final-review; editing an already-published rule from completed. */
+  | "edit-rule"
   | "completed";
 
 /** String keys used by generic text-field steps for `CreateFlowState`. */
@@ -173,6 +175,11 @@ export interface CreateFlowState {
    * `confirm-stakeholders` can re-apply `?fromFlow=1` on the template URL.
    */
   templateReviewEntryFromCreateFlow?: boolean;
+  /**
+   * When set, **Finalize** and signed-in **Save & Exit** update this published
+   * rule (PATCH) instead of POSTing a new rule or only saving a draft.
+   */
+  editingPublishedRuleId?: string;
   currentStep?: CreateFlowStep;
   /** Section drafts; structure will tighten as steps persist real shapes. */
   sections?: Record<string, unknown>[];
diff --git a/app/(app)/create/utils/createFlowProportionProgress.ts b/app/(app)/create/utils/createFlowProportionProgress.ts
index c5ede99..7ae30c5 100644
--- a/app/(app)/create/utils/createFlowProportionProgress.ts
+++ b/app/(app)/create/utils/createFlowProportionProgress.ts
@@ -34,6 +34,9 @@ if (PROPORTION_BY_STEP_INDEX.length !== FLOW_STEP_ORDER.length) {
 export function getProportionBarProgressForCreateFlowStep(
   step: CreateFlowStep | null | undefined,
 ): ProportionBarState {
+  if (step === "edit-rule") {
+    return "3-2";
+  }
   const idx = getStepIndex(step);
   if (idx < 0) return "1-0";
   return PROPORTION_BY_STEP_INDEX[idx] ?? "1-0";
diff --git a/app/(app)/create/utils/createFlowScreenRegistry.ts b/app/(app)/create/utils/createFlowScreenRegistry.ts
index 19bb251..588afd3 100644
--- a/app/(app)/create/utils/createFlowScreenRegistry.ts
+++ b/app/(app)/create/utils/createFlowScreenRegistry.ts
@@ -129,6 +129,12 @@ export const CREATE_FLOW_SCREEN_REGISTRY: Record<
     messageNamespace: "create.reviewAndComplete.finalReview",
     centeredBodyBelowMd: false,
   },
+  "edit-rule": {
+    layoutKind: "review",
+    figmaNodeId: "20907-212767",
+    messageNamespace: "create.reviewAndComplete.finalReview",
+    centeredBodyBelowMd: false,
+  },
   completed: {
     layoutKind: "completed",
     figmaNodeId: "20907-213286",
diff --git a/app/(app)/create/utils/flowSteps.ts b/app/(app)/create/utils/flowSteps.ts
index bbb57e6..fef556e 100644
--- a/app/(app)/create/utils/flowSteps.ts
+++ b/app/(app)/create/utils/flowSteps.ts
@@ -31,9 +31,13 @@ export const FLOW_STEP_ORDER: readonly CreateFlowStep[] = [
 ] as const;
 
 /**
- * Valid step IDs for the create flow (for validation)
+ * Valid URL segments for `/create/[screenId]` (includes branch-only `edit-rule`).
+ * Linear order for navigation remains {@link FLOW_STEP_ORDER}.
  */
-export const VALID_STEPS: readonly CreateFlowStep[] = FLOW_STEP_ORDER;
+export const VALID_STEPS: readonly CreateFlowStep[] = [
+  ...FLOW_STEP_ORDER,
+  "edit-rule",
+] as const;
 
 /**
  * First step in the flow (entry point)
diff --git a/app/api/rules/[id]/route.ts b/app/api/rules/[id]/route.ts
index 2092e54..517b97c 100644
--- a/app/api/rules/[id]/route.ts
+++ b/app/api/rules/[id]/route.ts
@@ -1,4 +1,5 @@
-import { NextResponse } from "next/server";
+import type { Prisma } from "@prisma/client";
+import { NextRequest, NextResponse } from "next/server";
 import { prisma } from "../../../../lib/server/db";
 import { isDatabaseConfigured } from "../../../../lib/server/env";
 import {
@@ -10,6 +11,9 @@ import {
 import { getPublicPublishedRuleById } from "../../../../lib/server/publishedRules";
 import { getSessionUser } from "../../../../lib/server/session";
 import { apiRoute } from "../../../../lib/server/apiRoute";
+import { publishRuleBodySchema } from "../../../../lib/server/validation/createFlowSchemas";
+import { readLimitedJson } from "../../../../lib/server/validation/requestBody";
+import { jsonFromZodError } from "../../../../lib/server/validation/zodHttp";
 
 type RouteContext = { params: Promise<{ id: string }> };
 
@@ -41,6 +45,56 @@ export const GET = apiRoute<RouteContext>(
   },
 );
 
+export const PATCH = apiRoute<RouteContext>(
+  "rules.byId.patch",
+  async (request: NextRequest, context) => {
+    if (!isDatabaseConfigured()) {
+      return dbUnavailable();
+    }
+
+    const user = await getSessionUser();
+    if (!user) {
+      return unauthorized();
+    }
+
+    const { id } = await context.params;
+
+    const row = await prisma.publishedRule.findUnique({
+      where: { id },
+      select: { id: true, userId: true },
+    });
+    if (!row) {
+      return notFound();
+    }
+    if (row.userId !== user.id) {
+      return forbidden("You do not have permission to update this rule");
+    }
+
+    const parsedBody = await readLimitedJson(request);
+    if (parsedBody.ok === false) {
+      return parsedBody.response;
+    }
+
+    const validated = publishRuleBodySchema.safeParse(parsedBody.value);
+    if (!validated.success) {
+      return jsonFromZodError(validated.error);
+    }
+
+    const { title, summary, document } = validated.data;
+
+    await prisma.publishedRule.update({
+      where: { id: row.id },
+      data: {
+        title,
+        summary,
+        document: document as Prisma.InputJsonValue,
+      },
+    });
+
+    return NextResponse.json({ ok: true });
+  },
+);
+
 export const DELETE = apiRoute<RouteContext>(
   "rules.byId.delete",
   async (_request, context) => {
diff --git a/app/components/buttons/InlineTextButton/InlineTextButton.tsx b/app/components/buttons/InlineTextButton/InlineTextButton.tsx
index c9a1364..56903a7 100644
--- a/app/components/buttons/InlineTextButton/InlineTextButton.tsx
+++ b/app/components/buttons/InlineTextButton/InlineTextButton.tsx
@@ -19,6 +19,9 @@ export interface InlineTextButtonProps {
   disabled?: boolean;
   ariaLabel?: string;
   type?: "button" | "submit" | "reset";
+  /** When set, removes the default underline (e.g. inverse surfaces). */
+  underline?: boolean;
+  "data-testid"?: string;
 }
 
 /**
@@ -37,9 +40,16 @@ function InlineTextButtonComponent({
   disabled = false,
   ariaLabel,
   type = "button",
+  underline = true,
+  "data-testid": dataTestId,
 }: InlineTextButtonProps) {
-  const baseClasses =
-    "cursor-pointer border-none bg-transparent p-0 font-inter font-normal text-[length:inherit] leading-[inherit] text-[color:var(--color-content-default-tertiary,#b4b4b4)] underline decoration-solid underline-offset-[3px] hover:opacity-90 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[var(--color-border-invert-primary)] disabled:cursor-not-allowed disabled:opacity-60";
+  const baseClasses = [
+    "cursor-pointer border-none bg-transparent p-0",
+    underline
+      ? "font-inter font-normal text-[length:inherit] leading-[inherit] text-[color:var(--color-content-default-tertiary,#b4b4b4)] underline decoration-solid underline-offset-[3px]"
+      : "text-[length:inherit] leading-[inherit] text-[color:inherit] no-underline",
+    "hover:opacity-90 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[var(--color-border-invert-primary)] disabled:cursor-not-allowed disabled:opacity-60",
+  ].join(" ");
 
   return (
     <button
@@ -47,6 +57,7 @@ function InlineTextButtonComponent({
       onClick={onClick}
       disabled={disabled}
       aria-label={ariaLabel}
+      data-testid={dataTestId}
       className={`${baseClasses} ${className}`.trim()}
     >
       {children}
diff --git a/app/components/cards/Rule/Rule.container.tsx b/app/components/cards/Rule/Rule.container.tsx
index 389f13d..190ed3c 100644
--- a/app/components/cards/Rule/Rule.container.tsx
+++ b/app/components/cards/Rule/Rule.container.tsx
@@ -25,6 +25,9 @@ const RuleContainer = memo<RuleProps>(
   ({
     title,
     description,
+    onDescriptionClick,
+    descriptionEmptyHint,
+    descriptionEditAriaLabel,
     icon,
     backgroundColor = "bg-[var(--color-community-teal-100)]",
     className = "",
@@ -75,6 +78,9 @@ const RuleContainer = memo<RuleProps>(
       <RuleView
         title={title}
         description={description}
+        onDescriptionClick={onDescriptionClick}
+        descriptionEmptyHint={descriptionEmptyHint}
+        descriptionEditAriaLabel={descriptionEditAriaLabel}
         icon={icon}
         backgroundColor={backgroundColor}
         className={className}
diff --git a/app/components/cards/Rule/Rule.types.ts b/app/components/cards/Rule/Rule.types.ts
index c4f2871..2712125 100644
--- a/app/components/cards/Rule/Rule.types.ts
+++ b/app/components/cards/Rule/Rule.types.ts
@@ -25,6 +25,18 @@ export interface RuleBottomLink {
 export interface RuleProps {
   title: string;
   description?: string;
+  /**
+   * When set, the description row (or {@link descriptionEmptyHint} when there
+   * is no body text) is clickable — caller handles modal / navigation.
+   */
+  onDescriptionClick?: () => void;
+  /**
+   * When {@link onDescriptionClick} is set, forwarded to the control’s
+   * `aria-label` (keyboard / SR).
+   */
+  descriptionEditAriaLabel?: string;
+  /** Shown when {@link onDescriptionClick} is set and `description` is empty. */
+  descriptionEmptyHint?: string;
   icon?: React.ReactNode;
   backgroundColor?: string;
   className?: string;
@@ -51,6 +63,9 @@ export interface RuleProps {
 export interface RuleViewProps {
   title: string;
   description?: string;
+  onDescriptionClick?: () => void;
+  descriptionEmptyHint?: string;
+  descriptionEditAriaLabel?: string;
   icon?: React.ReactNode;
   backgroundColor: string;
   className: string;
diff --git a/app/components/cards/Rule/Rule.view.tsx b/app/components/cards/Rule/Rule.view.tsx
index c61fb15..4c3eb68 100644
--- a/app/components/cards/Rule/Rule.view.tsx
+++ b/app/components/cards/Rule/Rule.view.tsx
@@ -3,12 +3,16 @@
 import Image from "next/image";
 import { useTranslation } from "../../../contexts/MessagesContext";
 import MultiSelect from "../../controls/MultiSelect";
+import InlineTextButton from "../../buttons/InlineTextButton";
 import NavigationLink from "../../navigation/Link";
 import type { RuleBottomLink, RuleViewProps } from "./Rule.types";
 
 export function RuleView({
   title,
   description,
+  onDescriptionClick,
+  descriptionEmptyHint,
+  descriptionEditAriaLabel,
   icon,
   backgroundColor,
   className,
@@ -314,6 +318,41 @@ export function RuleView({
         </div>
       ) : expanded ? (
         <>
+          {(description ||
+            (onDescriptionClick &&
+              typeof descriptionEmptyHint === "string")) && (
+            <div
+              className={`relative w-full shrink-0 border-b border-solid border-[var(--color-content-invert-primary)] pb-[16px] ${
+                expanded && (isLarge || isMedium) ? "px-0" : "px-[12px]"
+              }`}
+            >
+              {onDescriptionClick ? (
+                <InlineTextButton
+                  type="button"
+                  underline={false}
+                  data-testid="rule-description-edit"
+                  ariaLabel={descriptionEditAriaLabel}
+                  className={`${descriptionClass} w-full min-w-0 cursor-pointer whitespace-pre-wrap text-left text-[var(--color-content-invert-primary)] hover:!opacity-100 ${
+                    !description && descriptionEmptyHint ? "opacity-70" : ""
+                  }`.trim()}
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    onDescriptionClick();
+                  }}
+                >
+                  {description ?? descriptionEmptyHint ?? ""}
+                </InlineTextButton>
+              ) : (
+                description && (
+                  <p
+                    className={`${descriptionClass} cursor-inherit text-[var(--color-content-invert-primary)]`}
+                  >
+                    {description}
+                  </p>
+                )
+              )}
+            </div>
+          )}
           {/* Categories Section - Using MultiSelect */}
           {categories && categories.length > 0 && (
             <div
@@ -352,16 +391,6 @@ export function RuleView({
               ))}
             </div>
           )}
-          {/* Footer: Description */}
-          {description && (
-            <div className="border-t border-solid border-[var(--color-content-invert-primary)] pt-[16px] relative shrink-0 w-full">
-              <p
-                className={`${descriptionClass} cursor-inherit text-[var(--color-content-invert-primary)]`}
-              >
-                {description}
-              </p>
-            </div>
-          )}
         </>
       ) : (
         /* Collapsed State: Description */
diff --git a/lib/create/api.ts b/lib/create/api.ts
index aaf1965..558d9a2 100644
--- a/lib/create/api.ts
+++ b/lib/create/api.ts
@@ -241,6 +241,48 @@ export async function publishRule(input: {
   }
 }
 
+export async function updatePublishedRule(
+  id: string,
+  input: {
+    title: string;
+    summary?: string | null;
+    document: Record<string, unknown>;
+  },
+): Promise<{ ok: true } | { ok: false; error: string; status?: number }> {
+  try {
+    const res = await fetch(`/api/rules/${encodeURIComponent(id)}`, {
+      method: "PATCH",
+      credentials: "include",
+      headers: jsonHeaders,
+      body: JSON.stringify({
+        title: input.title,
+        summary: input.summary ?? null,
+        document: input.document,
+      }),
+    });
+    const data = await safeParseJsonResponse(res);
+    if (!res.ok) {
+      const fromBody =
+        data && typeof data === "object" ? readApiErrorMessage(data) : null;
+      const msg =
+        fromBody && fromBody !== "Request failed"
+          ? fromBody
+          : res.statusText?.trim() || PUBLISH_FAILED_FALLBACK;
+      return {
+        ok: false as const,
+        error: msg,
+        status: res.status,
+      };
+    }
+    return { ok: true as const };
+  } catch {
+    return {
+      ok: false as const,
+      error: DRAFT_SAVE_NETWORK_ERROR,
+    };
+  }
+}
+
 export type MyPublishedRule = {
   id: string;
   title: string;
diff --git a/lib/create/publishedDocumentToCreateFlowState.ts b/lib/create/publishedDocumentToCreateFlowState.ts
new file mode 100644
index 0000000..b435f39
--- /dev/null
+++ b/lib/create/publishedDocumentToCreateFlowState.ts
@@ -0,0 +1,100 @@
+import type { CreateFlowState } from "../../app/(app)/create/types";
+import type { PublishedMethodSelections } from "./buildPublishPayload";
+import type { StoredLastPublishedRule } from "./lastPublishedRule";
+
+/**
+ * Rehydrate create-flow fields from a stored published rule so `/create/edit-rule`
+ * can render final-review editors after refresh or when branching from completed.
+ */
+export function createFlowStateFromPublishedRule(
+  rule: StoredLastPublishedRule,
+): Partial<CreateFlowState> {
+  const doc = rule.document;
+  const out: Partial<CreateFlowState> = {
+    title: rule.title,
+    editingPublishedRuleId: rule.id,
+  };
+  const sum = typeof rule.summary === "string" ? rule.summary.trim() : "";
+  if (sum.length > 0) {
+    out.communityContext = sum;
+    out.summary = sum;
+  }
+
+  const coreValues = doc.coreValues;
+  if (Array.isArray(coreValues) && coreValues.length > 0) {
+    const selectedCoreValueIds: string[] = [];
+    const coreValuesChipsSnapshot: NonNullable<
+      CreateFlowState["coreValuesChipsSnapshot"]
+    > = [];
+    const coreValueDetailsByChipId: NonNullable<
+      CreateFlowState["coreValueDetailsByChipId"]
+    > = {};
+
+    for (const row of coreValues) {
+      if (!row || typeof row !== "object") continue;
+      const o = row as Record<string, unknown>;
+      const chipIdRaw = typeof o.chipId === "string" ? o.chipId.trim() : "";
+      const label = typeof o.label === "string" ? o.label.trim() : "";
+      if (!label) continue;
+      const chipId =
+        chipIdRaw.length > 0 ? chipIdRaw : `hydrated-${label.toLowerCase()}`;
+      selectedCoreValueIds.push(chipId);
+      coreValuesChipsSnapshot.push({
+        id: chipId,
+        label,
+        state: "selected",
+      });
+      coreValueDetailsByChipId[chipId] = {
+        meaning: typeof o.meaning === "string" ? o.meaning : "",
+        signals: typeof o.signals === "string" ? o.signals : "",
+      };
+    }
+    out.selectedCoreValueIds = selectedCoreValueIds;
+    out.coreValuesChipsSnapshot = coreValuesChipsSnapshot;
+    out.coreValueDetailsByChipId = coreValueDetailsByChipId;
+  }
+
+  const msRaw = doc.methodSelections;
+  if (!msRaw || typeof msRaw !== "object" || Array.isArray(msRaw)) {
+    out.sections = [];
+    return out;
+  }
+  const ms = msRaw as PublishedMethodSelections;
+
+  if (Array.isArray(ms.communication) && ms.communication.length > 0) {
+    out.selectedCommunicationMethodIds = ms.communication.map((x) => x.id);
+    out.communicationMethodDetailsById = Object.fromEntries(
+      ms.communication.map((x) => [x.id, x.sections]),
+    );
+  }
+  if (Array.isArray(ms.membership) && ms.membership.length > 0) {
+    out.selectedMembershipMethodIds = ms.membership.map((x) => x.id);
+    out.membershipMethodDetailsById = Object.fromEntries(
+      ms.membership.map((x) => [x.id, x.sections]),
+    );
+  }
+  if (
+    Array.isArray(ms.decisionApproaches) &&
+    ms.decisionApproaches.length > 0
+  ) {
+    out.selectedDecisionApproachIds = ms.decisionApproaches.map((x) => x.id);
+    out.decisionApproachDetailsById = Object.fromEntries(
+      ms.decisionApproaches.map((x) => [x.id, x.sections]),
+    );
+  }
+  if (
+    Array.isArray(ms.conflictManagement) &&
+    ms.conflictManagement.length > 0
+  ) {
+    out.selectedConflictManagementIds = ms.conflictManagement.map(
+      (x) => x.id,
+    );
+    out.conflictManagementDetailsById = Object.fromEntries(
+      ms.conflictManagement.map((x) => [x.id, x.sections]),
+    );
+  }
+
+  /** Drop template `sections` so final-review uses `methodSelections` / selected ids (edit path). */
+  out.sections = [];
+  return out;
+}
diff --git a/lib/server/validation/createFlowSchemas.ts b/lib/server/validation/createFlowSchemas.ts
index 390c104..b856549 100644
--- a/lib/server/validation/createFlowSchemas.ts
+++ b/lib/server/validation/createFlowSchemas.ts
@@ -121,6 +121,7 @@ export const createFlowStateSchema = z
       .optional(),
     templateReviewBackSlug: z.string().max(200).optional(),
     templateReviewEntryFromCreateFlow: z.boolean().optional(),
+    editingPublishedRuleId: z.string().max(200).optional(),
     currentStep: createFlowStepSchema.optional(),
     sections: z.array(z.unknown()).optional(),
     stakeholders: z.array(z.unknown()).optional(),
diff --git a/messages/en/create/reviewAndComplete/finalReview.json b/messages/en/create/reviewAndComplete/finalReview.json
index c763919..dc7bcc0 100644
--- a/messages/en/create/reviewAndComplete/finalReview.json
+++ b/messages/en/create/reviewAndComplete/finalReview.json
@@ -1,12 +1,20 @@
 {
   "title": "Review your CommunityRule",
   "description": "Here's what other people will see. Make sure everything looks good before you finalize everything. Once the rule is finalized, you must use one of your decision-making mechanisms to edit it again.",
+  "editPublishedTitle": "Edit your CommunityRule",
+  "editPublishedDescription": "Update what others see on your public rule. Save & Exit or Finalize applies changes to your published CommunityRule.",
   "ruleCardTitleFallback": "Your community",
   "chipEditModal": {
     "saveButton": "Save",
     "readOnlyCloseButton": "Close",
     "readOnlyNote": "Details for this entry aren't editable yet."
   },
+  "communityContextEditModal": {
+    "title": "Community description",
+    "description": "Update how your organization is described on your public CommunityRule.",
+    "emptyHint": "Add a community description",
+    "ariaEditDescription": "Edit community description"
+  },
   "categories": [
     {
       "name": "Values",
diff --git a/tests/components/FinalReviewPage.test.tsx b/tests/components/FinalReviewPage.test.tsx
index cda5660..976fe04 100644
--- a/tests/components/FinalReviewPage.test.tsx
+++ b/tests/components/FinalReviewPage.test.tsx
@@ -401,3 +401,67 @@ describe("FinalReviewScreen — chip edit modal save semantics", () => {
     expect(latest.communicationMethodDetailsById).toBeUndefined();
   });
 });
+
+function FinalReviewEditPublishedWithStateProbe({
+  onState,
+  initial,
+}: {
+  onState: (_state: CreateFlowState) => void;
+  initial: CreateFlowState;
+}) {
+  const { state, replaceState } = useCreateFlow();
+  useLayoutEffect(() => {
+    replaceState(initial);
+  }, [replaceState, initial]);
+  useEffect(() => {
+    onState(state);
+  }, [state, onState]);
+  return <FinalReviewScreen variant="editPublished" />;
+}
+
+describe("FinalReviewScreen — edit published description", () => {
+  it("does not expose click-to-edit description on default final review", () => {
+    render(
+      <FinalReviewWithFlowState
+        title="Oak"
+        communityContext="Visible body"
+      />,
+    );
+    expect(screen.queryByTestId("rule-description-edit")).not.toBeInTheDocument();
+  });
+
+  it("opens Save modal from description click and updates communityContext + summary", async () => {
+    let latest: CreateFlowState = {};
+    render(
+      <FinalReviewEditPublishedWithStateProbe
+        onState={(s) => {
+          latest = s;
+        }}
+        initial={{
+          title: "Oak Park Commons",
+          communityContext: "Original",
+          summary: "Original",
+          selectedCommunicationMethodIds: ["signal"],
+        }}
+      />,
+    );
+    void latest;
+
+    fireEvent.click(await screen.findByTestId("rule-description-edit"));
+    const dialog = await screen.findByRole("dialog");
+    expect(
+      within(dialog).getByText(/Community description/i),
+    ).toBeInTheDocument();
+    const input = within(dialog).getByRole("textbox");
+    fireEvent.change(input, { target: { value: "Updated copy" } });
+    fireEvent.click(within(dialog).getByRole("button", { name: "Save" }));
+
+    await waitFor(() => {
+      expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
+    });
+    await waitFor(() => {
+      expect(latest.communityContext).toBe("Updated copy");
+      expect(latest.summary).toBe("Updated copy");
+    });
+  });
+});
diff --git a/tests/unit/Rule.test.jsx b/tests/unit/Rule.test.jsx
index 8917505..6e7dc08 100644
--- a/tests/unit/Rule.test.jsx
+++ b/tests/unit/Rule.test.jsx
@@ -106,6 +106,23 @@ describe("Rule Component", () => {
     ).not.toBeInTheDocument();
   });
 
+  it("clicking editable description calls onDescriptionClick and does not fire card onClick", () => {
+    const onCard = vi.fn();
+    const onDesc = vi.fn();
+    render(
+      <Rule
+        {...defaultProps}
+        expanded={true}
+        onClick={onCard}
+        onDescriptionClick={onDesc}
+        descriptionEmptyHint="Add description"
+      />,
+    );
+    fireEvent.click(screen.getByTestId("rule-description-edit"));
+    expect(onDesc).toHaveBeenCalledTimes(1);
+    expect(onCard).not.toHaveBeenCalled();
+  });
+
   it("applies proper sizing for expanded states", () => {
     render(<Rule {...defaultProps} expanded={true} size="L" />);
 
diff --git a/tests/unit/createFlowProportionProgress.test.ts b/tests/unit/createFlowProportionProgress.test.ts
index 722152b..2034f32 100644
--- a/tests/unit/createFlowProportionProgress.test.ts
+++ b/tests/unit/createFlowProportionProgress.test.ts
@@ -50,4 +50,8 @@ describe("getProportionBarProgressForCreateFlowStep", () => {
       getProportionBarProgressForCreateFlowStep("conflict-management"),
     ).toBe("3-0");
   });
+
+  it("uses 3-2 on edit-rule (same as final-review segment)", () => {
+    expect(getProportionBarProgressForCreateFlowStep("edit-rule")).toBe("3-2");
+  });
 });
diff --git a/tests/unit/flowSteps.test.ts b/tests/unit/flowSteps.test.ts
index bd10248..9bde8f8 100644
--- a/tests/unit/flowSteps.test.ts
+++ b/tests/unit/flowSteps.test.ts
@@ -38,12 +38,13 @@ describe("flowSteps", () => {
     expect(getPreviousStep(null)).toBeNull();
   });
 
-  it("isValidStep reflects FLOW_STEP_ORDER membership", () => {
-    expect(isValidStep("community-size")).toBe(true);
-    expect(isValidStep("confirm-stakeholders")).toBe(true);
-    expect(isValidStep("core-values")).toBe(true);
-    expect(isValidStep("nope")).toBe(false);
-    expect(isValidStep(null)).toBe(false);
+  it("isValidStep allows branch-only edit-rule URL segment", () => {
+    expect(isValidStep("edit-rule")).toBe(true);
+  });
+
+  it("getNextStep and getPreviousStep return null for edit-rule (not in linear order)", () => {
+    expect(getNextStep("edit-rule")).toBeNull();
+    expect(getPreviousStep("edit-rule")).toBeNull();
   });
 
   it("getStepIndex matches position in FLOW_STEP_ORDER", () => {
diff --git a/tests/unit/publishedDocumentToCreateFlowState.test.ts b/tests/unit/publishedDocumentToCreateFlowState.test.ts
new file mode 100644
index 0000000..d31d360
--- /dev/null
+++ b/tests/unit/publishedDocumentToCreateFlowState.test.ts
@@ -0,0 +1,52 @@
+import { describe, expect, it } from "vitest";
+import { createFlowStateFromPublishedRule } from "../../lib/create/publishedDocumentToCreateFlowState";
+
+describe("createFlowStateFromPublishedRule", () => {
+  it("maps coreValues and methodSelections into draft fields", () => {
+    const partial = createFlowStateFromPublishedRule({
+      id: "rule-1",
+      title: "Oak",
+      summary: "River cleanup",
+      document: {
+        coreValues: [
+          { chipId: "1", label: "Ecology", meaning: "m", signals: "s" },
+        ],
+        methodSelections: {
+          communication: [
+            {
+              id: "slack",
+              label: "Slack",
+              sections: {
+                corePrinciple: "p",
+                logisticsAdmin: "l",
+                codeOfConduct: "c",
+              },
+            },
+          ],
+        },
+      },
+    });
+    expect(partial.editingPublishedRuleId).toBe("rule-1");
+    expect(partial.title).toBe("Oak");
+    expect(partial.communityContext).toBe("River cleanup");
+    expect(partial.selectedCoreValueIds).toEqual(["1"]);
+    expect(partial.coreValuesChipsSnapshot?.[0]?.label).toBe("Ecology");
+    expect(partial.selectedCommunicationMethodIds).toEqual(["slack"]);
+    expect(partial.communicationMethodDetailsById?.slack?.corePrinciple).toBe(
+      "p",
+    );
+    expect(partial.sections).toEqual([]);
+  });
+
+  it("sets sections to [] even when methodSelections is missing (edit hydrate)", () => {
+    const partial = createFlowStateFromPublishedRule({
+      id: "rule-2",
+      title: "Pine",
+      summary: "",
+      document: {
+        coreValues: [],
+      },
+    });
+    expect(partial.sections).toEqual([]);
+  });
+});
diff --git a/tests/unit/rulesByIdPatchRoute.test.ts b/tests/unit/rulesByIdPatchRoute.test.ts
new file mode 100644
index 0000000..01155d7
--- /dev/null
+++ b/tests/unit/rulesByIdPatchRoute.test.ts
@@ -0,0 +1,111 @@
+import { NextRequest } from "next/server";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const isDatabaseConfiguredMock = vi.fn();
+const findUniqueMock = vi.fn();
+const updateMock = vi.fn();
+const getSessionUserMock = vi.fn();
+
+vi.mock("../../lib/server/env", () => ({
+  isDatabaseConfigured: () => isDatabaseConfiguredMock(),
+}));
+
+vi.mock("../../lib/server/db", () => ({
+  prisma: {
+    publishedRule: {
+      findUnique: (...args: unknown[]) => findUniqueMock(...args),
+      update: (...args: unknown[]) => updateMock(...args),
+    },
+  },
+}));
+
+vi.mock("../../lib/server/session", () => ({
+  getSessionUser: () => getSessionUserMock(),
+}));
+
+import { PATCH } from "../../app/api/rules/[id]/route";
+
+function makeContext(id: string) {
+  return { params: Promise.resolve({ id }) };
+}
+
+beforeEach(() => {
+  isDatabaseConfiguredMock.mockReset();
+  findUniqueMock.mockReset();
+  updateMock.mockReset();
+  getSessionUserMock.mockReset();
+  getSessionUserMock.mockResolvedValue({ id: "user-1", email: "a@b.c" });
+});
+
+describe("PATCH /api/rules/[id]", () => {
+  it("returns 401 when unauthenticated", async () => {
+    isDatabaseConfiguredMock.mockReturnValue(true);
+    getSessionUserMock.mockResolvedValueOnce(null);
+    const res = await PATCH(
+      new NextRequest("https://x.test/api/rules/r1", {
+        method: "PATCH",
+        body: JSON.stringify({
+          title: "T",
+          summary: null,
+          document: { sections: [] },
+        }),
+      }),
+      makeContext("r1"),
+    );
+    expect(res.status).toBe(401);
+    expect(updateMock).not.toHaveBeenCalled();
+  });
+
+  it("returns 403 when the rule belongs to another user", async () => {
+    isDatabaseConfiguredMock.mockReturnValue(true);
+    findUniqueMock.mockResolvedValueOnce({
+      id: "r1",
+      userId: "other",
+    });
+    const res = await PATCH(
+      new NextRequest("https://x.test/api/rules/r1", {
+        method: "PATCH",
+        body: JSON.stringify({
+          title: "T",
+          summary: null,
+          document: { sections: [] },
+        }),
+      }),
+      makeContext("r1"),
+    );
+    expect(res.status).toBe(403);
+    expect(updateMock).not.toHaveBeenCalled();
+  });
+
+  it("updates the rule when owner matches", async () => {
+    isDatabaseConfiguredMock.mockReturnValue(true);
+    findUniqueMock.mockResolvedValueOnce({
+      id: "r1",
+      userId: "user-1",
+    });
+    updateMock.mockResolvedValueOnce({});
+    const res = await PATCH(
+      new NextRequest("https://x.test/api/rules/r1", {
+        method: "PATCH",
+        body: JSON.stringify({
+          title: "Updated",
+          summary: "Context",
+          document: { sections: [], coreValues: [] },
+        }),
+      }),
+      makeContext("r1"),
+    );
+    expect(res.status).toBe(200);
+    const body = (await res.json()) as { ok: boolean };
+    expect(body.ok).toBe(true);
+    expect(updateMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        where: { id: "r1" },
+        data: expect.objectContaining({
+          title: "Updated",
+          summary: "Context",
+        }),
+      }),
+    );
+  });
+});