diff --git a/ui/src/e2e/skill-workshop-applied-diff.e2e.test.ts b/ui/src/e2e/skill-workshop-applied-diff.e2e.test.ts
new file mode 100644
index 000000000000..3a593aa52ab2
--- /dev/null
+++ b/ui/src/e2e/skill-workshop-applied-diff.e2e.test.ts
@@ -0,0 +1,148 @@
+import { mkdir, rm } from "node:fs/promises";
+import path from "node:path";
+import { chromium, type Browser } from "playwright";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import {
+  canRunPlaywrightChromium,
+  installMockGateway,
+  resolvePlaywrightChromiumExecutablePath,
+  startControlUiE2eServer,
+  type ControlUiE2eServer,
+  type MockGatewayRequest,
+} from "../test-helpers/control-ui-e2e.ts";
+
+const chromiumExecutablePath = resolvePlaywrightChromiumExecutablePath(chromium.executablePath());
+const chromiumAvailable = canRunPlaywrightChromium(chromiumExecutablePath);
+const allowMissingChromium = process.env.OPENCLAW_UI_E2E_ALLOW_MISSING_CHROMIUM === "1";
+const describeControlUiE2e = chromiumAvailable || !allowMissingChromium ? describe : describe.skip;
+const artifactDir = path.resolve(process.cwd(), ".artifacts/control-ui-e2e/applied-revision-diff");
+
+let browser: Browser;
+let server: ControlUiE2eServer;
+
+function appliedProposal(id: string, updatedAt: string) {
+  return {
+    createdAt: updatedAt,
+    description: "Keep the release procedure accurate.",
+    id,
+    kind: "update",
+    scanState: "clean",
+    skillKey: "deploy-review",
+    skillName: "Deploy Review",
+    status: "applied",
+    title: "Deploy review",
+    updatedAt,
+  };
+}
+
+function inspectResponse(
+  proposal: ReturnType<typeof appliedProposal>,
+  content: string,
+  version: string,
+) {
+  return {
+    content,
+    record: {
+      ...proposal,
+      proposedVersion: version,
+      target: { skillKey: proposal.skillKey, skillName: proposal.skillName },
+    },
+    supportFiles: [],
+  };
+}
+
+function inspectedProposalId(request: MockGatewayRequest): unknown {
+  const params = request.params;
+  if (!params || typeof params !== "object" || !("proposalId" in params)) {
+    throw new Error("Expected skills.proposals.inspect params");
+  }
+  return params.proposalId;
+}
+
+describeControlUiE2e("Skill Workshop applied revision diff mocked Gateway E2E", () => {
+  beforeAll(async () => {
+    if (!chromiumAvailable) {
+      throw new Error(`Playwright Chromium is unavailable at ${chromiumExecutablePath}`);
+    }
+    await rm(artifactDir, { force: true, recursive: true });
+    await mkdir(artifactDir, { recursive: true });
+    server = await startControlUiE2eServer();
+    browser = await chromium.launch({ executablePath: chromiumExecutablePath });
+  });
+
+  afterAll(async () => {
+    await browser?.close();
+    await server?.close();
+  });
+
+  it("shows a compact revision diff and switches to the full body", async () => {
+    const previous = appliedProposal("proposal-v1", "2026-08-16T10:00:00.000Z");
+    const latest = appliedProposal("proposal-v2", "2026-08-17T10:00:00.000Z");
+    const previousBody = "# Deploy review\n\n## Steps\n1. Verify package.\n2. Publish release.";
+    const latestBody = "# Deploy review\n\n## Steps\n1. Verify package.\n2. Publish package.";
+    const context = await browser.newContext({
+      locale: "en-US",
+      recordVideo: { dir: artifactDir, size: { height: 900, width: 1280 } },
+      serviceWorkers: "block",
+      viewport: { height: 900, width: 1280 },
+    });
+    const page = await context.newPage();
+    const gateway = await installMockGateway(page, {
+      methodResponses: {
+        "skills.proposals.inspect": {
+          cases: [
+            {
+              match: { proposalId: latest.id },
+              response: inspectResponse(latest, latestBody, "v2"),
+            },
+            {
+              match: { proposalId: previous.id },
+              response: inspectResponse(previous, previousBody, "v1"),
+            },
+          ],
+        },
+        "skills.proposals.list": {
+          proposals: [latest, previous],
+          schema: "openclaw.skill-workshop.proposals-manifest.v1",
+          updatedAt: latest.updatedAt,
+        },
+      },
+    });
+
+    try {
+      const response = await page.goto(`${server.baseUrl}skills/workshop`);
+      expect(response?.status()).toBe(200);
+      await gateway.waitForRequest("skills.proposals.list");
+      await page.locator("#skill-workshop-mode-tab-board").click();
+      await page.locator(".sw-lifecycle-tab", { hasText: "Applied" }).click();
+
+      const changes = page.getByRole("button", { name: "Changes", exact: true });
+      await expect.poll(() => changes.getAttribute("aria-pressed")).toBe("true");
+      await page.locator(".sw-diff__row--add", { hasText: "Publish package." }).waitFor();
+      await page.locator(".sw-diff__row--del", { hasText: "Publish release." }).waitFor();
+      const inspectRequests = await gateway.getRequests("skills.proposals.inspect");
+      expect(new Set(inspectRequests.map(inspectedProposalId))).toEqual(
+        new Set([latest.id, previous.id]),
+      );
+      await page.screenshot({
+        animations: "disabled",
+        fullPage: true,
+        path: path.join(artifactDir, "01-changes.png"),
+      });
+
+      await page.getByRole("button", { name: "Full body", exact: true }).click();
+      await page.getByText("Publish package.", { exact: true }).waitFor();
+      expect(await page.locator(".sw-diff").count()).toBe(0);
+      expect(await gateway.getRequests("skills.proposals.inspect")).toHaveLength(
+        inspectRequests.length,
+      );
+      await page.screenshot({
+        animations: "disabled",
+        fullPage: true,
+        path: path.join(artifactDir, "02-full-body.png"),
+      });
+    } finally {
+      await context.close();
+    }
+  });
+});
diff --git a/ui/src/i18n/locales/en.ts b/ui/src/i18n/locales/en.ts
index 43ef5b26ed10..98038f269c87 100644
--- a/ui/src/i18n/locales/en.ts
+++ b/ui/src/i18n/locales/en.ts
@@ -3479,6 +3479,15 @@ export const en: TranslationMap = {
       yesterday: "Yesterday",
       earlier: "Earlier this week",
     },
+    diff: {
+      changes: "Changes",
+      fullBody: "Full body",
+      viewLabel: "Revision view",
+      unchanged: "This revision left the skill body unchanged.",
+      loadingPrevious: "Loading the previous revision\u2026",
+      previousUnavailable: "The previous revision is unavailable, so this is the full body.",
+      tooLarge: "This comparison is too large to show here. Switch to Full body to read it.",
+    },
     applied: {
       history: "History",
       revision: "{count} revision",
diff --git a/ui/src/lib/chat/tool-call-diff.test.ts b/ui/src/lib/chat/tool-call-diff.test.ts
index 0d10092e512d..93b58cfc6f27 100644
--- a/ui/src/lib/chat/tool-call-diff.test.ts
+++ b/ui/src/lib/chat/tool-call-diff.test.ts
@@ -106,6 +106,35 @@ describe("computeLineDiff", () => {
       { kind: "skip", text: "" },
     ]);
   });
+
+  it("collapses unchanged runs to three context lines when asked", () => {
+    const oldLines = Array.from({ length: 40 }, (_, index) => `line ${index}`);
+    const newLines = [...oldLines];
+    newLines[20] = "changed";
+
+    const full = computeLineDiff(oldLines.join("\n"), newLines.join("\n"));
+    const compact = computeLineDiff(oldLines.join("\n"), newLines.join("\n"), {
+      compactUnchanged: true,
+    });
+
+    expect(full).toHaveLength(41);
+    expect(compact.filter((line) => line.kind === "ctx").map((line) => line.text)).toEqual([
+      "line 17",
+      "line 18",
+      "line 19",
+      "line 21",
+      "line 22",
+      "line 23",
+    ]);
+    expect(compact.filter((line) => line.kind === "skip")).toHaveLength(2);
+  });
+
+  it("compacts an identical pair to nothing so callers can say unchanged", () => {
+    const text = "alpha\nbeta\ngamma";
+
+    expect(computeLineDiff(text, text, { compactUnchanged: true })).toEqual([]);
+    expect(computeLineDiff(text, text)).toHaveLength(3);
+  });
 });
 
 describe("buildWriteDiffLines", () => {
diff --git a/ui/src/lib/chat/tool-call-diff.ts b/ui/src/lib/chat/tool-call-diff.ts
index 2339c6bb327d..bb45583b5723 100644
--- a/ui/src/lib/chat/tool-call-diff.ts
+++ b/ui/src/lib/chat/tool-call-diff.ts
@@ -100,12 +100,19 @@ function splitDiffLines(text: string): string[] {
   return lines;
 }
 
-function compactLineDiff(lines: DiffLine[], inputTruncated: boolean): DiffLine[] {
-  if (lines.length <= MAX_DIFF_RENDER_LINES && !inputTruncated) {
+function compactLineDiff(
+  lines: DiffLine[],
+  inputTruncated: boolean,
+  compactUnchanged: boolean,
+): DiffLine[] {
+  if (!compactUnchanged && lines.length <= MAX_DIFF_RENDER_LINES && !inputTruncated) {
     return lines;
   }
   const hasChange = lines.some((line) => line.kind === "add" || line.kind === "del");
   if (!hasChange) {
+    if (compactUnchanged && !inputTruncated) {
+      return [];
+    }
     return inputTruncated
       ? [{ kind: "skip", text: "" }]
       : [...lines.slice(0, MAX_DIFF_RENDER_LINES), { kind: "skip", text: "" }];
@@ -151,8 +158,14 @@ function compactLineDiff(lines: DiffLine[], inputTruncated: boolean): DiffLine[]
 /**
  * Compute a line diff between two snippets (no file line numbers available).
  * Standard LCS table; inputs are bounded so the quadratic cost stays small.
+ *
+ * `compactUnchanged` collapses unchanged runs to three lines of context.
  */
-export function computeLineDiff(oldText: string, newText: string): DiffLine[] {
+export function computeLineDiff(
+  oldText: string,
+  newText: string,
+  options?: { compactUnchanged?: boolean },
+): DiffLine[] {
   const allOldLines = splitDiffLines(oldText);
   const allNewLines = splitDiffLines(newText);
   const inputTruncated =
@@ -213,7 +226,7 @@ export function computeLineDiff(oldText: string, newText: string): DiffLine[] {
     }
     j++;
   }
-  return compactLineDiff(lines, inputTruncated);
+  return compactLineDiff(lines, inputTruncated, options?.compactUnchanged === true);
 }
 
 /** All-added preview for freshly written files, numbered from line 1. */
diff --git a/ui/src/lib/skill-workshop/index.test.ts b/ui/src/lib/skill-workshop/index.test.ts
index b9b40a0d1cd3..cba7ea770f5e 100644
--- a/ui/src/lib/skill-workshop/index.test.ts
+++ b/ui/src/lib/skill-workshop/index.test.ts
@@ -2,6 +2,7 @@ import { describe, expect, it } from "vitest";
 import {
   filterSkillWorkshopAppliedSkills,
   filterSkillWorkshopProposals,
+  findSkillWorkshopAppliedPredecessor,
   type SkillWorkshopProposal,
   type SkillWorkshopProposalStatus,
 } from "./index.ts";
@@ -30,6 +31,7 @@ function proposal(options: {
     recencyGroup: "today",
     ageLabel: "now",
     supportFiles: [],
+    bodyLoaded: true,
     isNew: false,
   };
 }
@@ -98,4 +100,26 @@ describe("Skill Workshop proposal filtering", () => {
     }
     expect(filterSkillWorkshopProposals(proposals, "all", "")).toEqual(proposals);
   });
+
+  it("points every applied revision at the one it replaced", () => {
+    const proposals = [
+      proposal({ key: "v3", updatedAt: 3 }),
+      proposal({ key: "v1", updatedAt: 1 }),
+      proposal({ key: "v2", updatedAt: 2 }),
+      proposal({ key: "other", slug: "other-skill", updatedAt: 9 }),
+      proposal({ key: "pending", status: "pending", updatedAt: 4 }),
+    ];
+
+    const [skill] = filterSkillWorkshopAppliedSkills(proposals, "release-sanity");
+    expect(
+      skill?.revisions.map(({ proposal: item, previous }) => [item.key, previous?.key]),
+    ).toEqual([
+      ["v3", "v2"],
+      ["v2", "v1"],
+      ["v1", undefined],
+    ]);
+    expect(findSkillWorkshopAppliedPredecessor(proposals, "v3")?.key).toBe("v2");
+    expect(findSkillWorkshopAppliedPredecessor(proposals, "v1")).toBeNull();
+    expect(findSkillWorkshopAppliedPredecessor(proposals, "pending")).toBeNull();
+  });
 });
diff --git a/ui/src/lib/skill-workshop/index.ts b/ui/src/lib/skill-workshop/index.ts
index dbbc427e6819..12bb1922b947 100644
--- a/ui/src/lib/skill-workshop/index.ts
+++ b/ui/src/lib/skill-workshop/index.ts
@@ -57,6 +57,12 @@ export type SkillWorkshopProposal = {
   name: string;
   oneLine: string;
   body: string;
+  /**
+   * A proposal inspected through the gateway may legitimately have an empty
+   * body, so emptiness alone cannot mean "not fetched yet". Cold entries from
+   * the manifest carry `false`.
+   */
+  bodyLoaded: boolean;
   status: SkillWorkshopProposalStatus;
   origin?: {
     agentId?: string;
@@ -78,6 +84,7 @@ export type SkillWorkshopProposal = {
 export type SkillWorkshopStatusFilter = "all" | SkillWorkshopProposalStatus;
 export type SkillWorkshopAction = "apply" | "evaluate" | "revise" | "reject";
 export type SkillWorkshopMode = "board" | "today";
+export type SkillWorkshopAppliedDiffMode = "changes" | "full";
 
 export type SkillWorkshopActionBusy = {
   key: string;
@@ -94,6 +101,7 @@ type SkillWorkshopAppliedRevision = {
   proposal: SkillWorkshopProposal;
   version: number;
   operation: SkillWorkshopProposal["kind"];
+  previous: SkillWorkshopProposal | null;
 };
 
 export type SkillWorkshopAppliedSkill = {
@@ -140,11 +148,29 @@ function groupSkillWorkshopAppliedSkills(
     latest: proposalsForSkill[0],
     revisions: proposalsForSkill.map((proposal, index) => {
       const version = proposalsForSkill.length - index;
-      return { proposal, version, operation: proposal.kind };
+      return {
+        proposal,
+        version,
+        operation: proposal.kind,
+        previous: proposalsForSkill[index + 1] ?? null,
+      };
     }),
   }));
 }
 
+export function findSkillWorkshopAppliedPredecessor(
+  proposals: SkillWorkshopProposal[],
+  key: string,
+): SkillWorkshopProposal | null {
+  for (const skill of groupSkillWorkshopAppliedSkills(proposals)) {
+    const revision = skill.revisions.find(({ proposal }) => proposal.key === key);
+    if (revision) {
+      return revision.previous;
+    }
+  }
+  return null;
+}
+
 export function filterSkillWorkshopAppliedSkills(
   proposals: SkillWorkshopProposal[],
   query: string,
diff --git a/ui/src/pages/skill-workshop/applied-history.runtime.ts b/ui/src/pages/skill-workshop/applied-history.runtime.ts
index 754d01969fe2..8fc67976b9cb 100644
--- a/ui/src/pages/skill-workshop/applied-history.runtime.ts
+++ b/ui/src/pages/skill-workshop/applied-history.runtime.ts
@@ -1,8 +1,43 @@
 import { html } from "lit";
 import { t } from "../../i18n/index.ts";
+import { computeLineDiff, type DiffLine, diffStat } from "../../lib/chat/tool-call-diff.ts";
 import type { SkillWorkshopAppliedSkill } from "../../lib/skill-workshop/index.ts";
 import type { SkillWorkshopProps } from "./view-types.ts";
 
+const DIFF_SIGN: Record<DiffLine["kind"], string> = {
+  add: "+",
+  del: "-",
+  ctx: " ",
+  file: " ",
+  skip: "\u22ef",
+};
+
+function renderDiffRow(line: DiffLine) {
+  return html`
+    <div class="sw-diff__row sw-diff__row--${line.kind}">
+      <span class="sw-diff__sign" aria-hidden="true">${DIFF_SIGN[line.kind]}</span>
+      <span class="sw-diff__text">${line.kind === "skip" ? "" : line.text}</span>
+    </div>
+  `;
+}
+
+export function renderAppliedRevisionDiff(previousBody: string, body: string) {
+  const lines = computeLineDiff(previousBody, body, { compactUnchanged: true });
+  if (lines.length === 0) {
+    return html`<p class="sw-muted">${t("skillWorkshop.diff.unchanged")}</p>`;
+  }
+  const { added, removed } = diffStat(lines);
+  return html`
+    <div class="sw-diff">
+      <p class="sw-diff__stat">
+        <span class="sw-diff__stat-add">+${added}</span>
+        <span class="sw-diff__stat-del">-${removed}</span>
+      </p>
+      <div class="sw-diff__rows">${lines.map(renderDiffRow)}</div>
+    </div>
+  `;
+}
+
 export function renderAppliedHistory(props: SkillWorkshopProps, skill: SkillWorkshopAppliedSkill) {
   return html`
     <section class="sw-section sw-applied-history">
diff --git a/ui/src/pages/skill-workshop/applied-history.ts b/ui/src/pages/skill-workshop/applied-history.ts
index 5b8b97ea6670..176d387d9f5b 100644
--- a/ui/src/pages/skill-workshop/applied-history.ts
+++ b/ui/src/pages/skill-workshop/applied-history.ts
@@ -8,18 +8,26 @@ import {
 } from "../../lib/skill-workshop/index.ts";
 import type { SkillWorkshopProps } from "./view-types.ts";
 
-type AppliedHistoryRenderer = typeof import("./applied-history.runtime.ts").renderAppliedHistory;
+type AppliedHistoryRuntime = typeof import("./applied-history.runtime.ts");
 
-let appliedHistoryRenderer: AppliedHistoryRenderer | undefined;
-let appliedHistoryRuntime: Promise<AppliedHistoryRenderer> | undefined;
+const MAX_APPLIED_DIFF_INPUT_CHARS = 120_000;
 
-function loadAppliedHistoryRenderer(): Promise<AppliedHistoryRenderer> {
-  return (appliedHistoryRuntime ??= import("./applied-history.runtime.ts").then((runtime) => {
-    appliedHistoryRenderer = runtime.renderAppliedHistory;
-    return appliedHistoryRenderer;
+let appliedHistoryRuntime: AppliedHistoryRuntime | undefined;
+let appliedHistoryLoad: Promise<AppliedHistoryRuntime> | undefined;
+
+// Diff computation and its markup stay behind this one dynamic import so the
+// startup bundle never carries them; both lazy entries share the same load.
+function loadAppliedHistoryRuntime(): Promise<AppliedHistoryRuntime> {
+  return (appliedHistoryLoad ??= import("./applied-history.runtime.ts").then((runtime) => {
+    appliedHistoryRuntime = runtime;
+    return runtime;
   }));
 }
 
+function pendingRuntime() {
+  return html`<p class="sw-muted" aria-busy="true">${t("common.loading")}</p>`;
+}
+
 export function resolveAppliedHistory(
   proposals: SkillWorkshopProposal[],
   query: string,
@@ -35,15 +43,58 @@ export function resolveAppliedHistory(
   return { skills, selectedSkill, selectedProposal };
 }
 
+/**
+ * What the body card should show for a revision. `previousUnavailable` keeps
+ * the full body but says so, because a predecessor inspect can fail and a
+ * silent full body would read as "nothing changed".
+ */
+export type SkillWorkshopBodyView =
+  | { kind: "full" }
+  | { kind: "loadingPrevious" }
+  | { kind: "previousUnavailable" }
+  | { kind: "tooLarge" }
+  | { kind: "diff"; previous: SkillWorkshopProposal };
+
+export function resolveAppliedBodyView(
+  props: SkillWorkshopProps,
+  proposal: SkillWorkshopProposal,
+  previous: SkillWorkshopProposal | null,
+): SkillWorkshopBodyView {
+  if (!previous || props.appliedDiffMode === "full") {
+    return { kind: "full" };
+  }
+  if (previous.bodyLoaded) {
+    if (previous.body.length + proposal.body.length > MAX_APPLIED_DIFF_INPUT_CHARS) {
+      return { kind: "tooLarge" };
+    }
+    return { kind: "diff", previous };
+  }
+  return props.inspectingKey === previous.key
+    ? { kind: "loadingPrevious" }
+    : { kind: "previousUnavailable" };
+}
+
 export function renderLazyAppliedHistory(
   props: SkillWorkshopProps,
   skill: SkillWorkshopAppliedSkill,
 ) {
-  if (appliedHistoryRenderer) {
-    return appliedHistoryRenderer(props, skill);
+  if (appliedHistoryRuntime) {
+    return appliedHistoryRuntime.renderAppliedHistory(props, skill);
   }
   return until(
-    loadAppliedHistoryRenderer().then((renderer) => renderer(props, skill)),
-    html`<p class="sw-muted" aria-busy="true">${t("common.loading")}</p>`,
+    loadAppliedHistoryRuntime().then((runtime) => runtime.renderAppliedHistory(props, skill)),
+    pendingRuntime(),
+  );
+}
+
+export function renderLazyAppliedRevisionDiff(previousBody: string, body: string) {
+  if (appliedHistoryRuntime) {
+    return appliedHistoryRuntime.renderAppliedRevisionDiff(previousBody, body);
+  }
+  return until(
+    loadAppliedHistoryRuntime().then((runtime) =>
+      runtime.renderAppliedRevisionDiff(previousBody, body),
+    ),
+    pendingRuntime(),
   );
 }
diff --git a/ui/src/pages/skill-workshop/evaluation.browser.test.ts b/ui/src/pages/skill-workshop/evaluation.browser.test.ts
index 8c199e9cbc26..0c7fbc6a04f0 100644
--- a/ui/src/pages/skill-workshop/evaluation.browser.test.ts
+++ b/ui/src/pages/skill-workshop/evaluation.browser.test.ts
@@ -84,6 +84,7 @@ const proposal: SkillWorkshopProposal = {
   recencyGroup: "today",
   ageLabel: "now",
   supportFiles: [],
+  bodyLoaded: true,
   isNew: false,
 };
 
@@ -101,6 +102,7 @@ function propsFor(mode: SkillWorkshopMode): SkillWorkshopProps {
     inspectingKey: null,
     proposals: [proposal],
     selectedKey: proposal.key,
+    appliedDiffMode: "changes",
     statusFilter: "pending",
     query: "",
     filePreviewKey: null,
@@ -123,6 +125,7 @@ function propsFor(mode: SkillWorkshopMode): SkillWorkshopProps {
     onQueueWidthChange: vi.fn(),
     onModeChange: vi.fn(),
     onSelect: vi.fn(),
+    onAppliedDiffModeChange: vi.fn(),
     onPrev: vi.fn(),
     onNext: vi.fn(),
     onApply: vi.fn(),
diff --git a/ui/src/pages/skill-workshop/proposal-records.ts b/ui/src/pages/skill-workshop/proposal-records.ts
new file mode 100644
index 000000000000..d4e6d4ce6845
--- /dev/null
+++ b/ui/src/pages/skill-workshop/proposal-records.ts
@@ -0,0 +1,244 @@
+import { parseDateStringTimestampMs } from "@openclaw/normalization-core/number-coercion";
+import { formatBytes } from "../../lib/agents/display.ts";
+import type {
+  SkillWorkshopEvaluation,
+  SkillWorkshopProposal,
+  SkillWorkshopProposalStatus,
+} from "../../lib/skill-workshop/index.ts";
+
+type SkillProposalStatus = SkillWorkshopProposalStatus;
+type SkillProposalKind = SkillWorkshopProposal["kind"];
+type SkillProposalScanState = "pending" | "clean" | "failed" | "quarantined";
+
+type SkillProposalManifestEntry = {
+  id: string;
+  kind: SkillProposalKind;
+  status: SkillProposalStatus;
+  title: string;
+  description: string;
+  skillName: string;
+  skillKey: string;
+  createdAt: string;
+  updatedAt: string;
+  scanState: SkillProposalScanState;
+};
+
+export type SkillProposalManifest = {
+  schema: "openclaw.skill-workshop.proposals-manifest.v1";
+  updatedAt: string;
+  proposals: SkillProposalManifestEntry[];
+};
+
+type SkillProposalSupportFileRecord = {
+  path: string;
+  sizeBytes: number;
+};
+
+type SkillProposalOrigin = {
+  agentId?: string;
+  sessionKey?: string;
+  runId?: string;
+  messageId?: string;
+};
+
+type SkillProposalRecord = {
+  id: string;
+  kind: SkillProposalKind;
+  status: SkillProposalStatus;
+  title: string;
+  description: string;
+  createdAt: string;
+  updatedAt: string;
+  proposedVersion: string;
+  draftHash: string;
+  evaluation?: SkillWorkshopEvaluation;
+  origin?: SkillProposalOrigin;
+  supportFiles?: SkillProposalSupportFileRecord[];
+  target: {
+    skillName: string;
+    skillKey: string;
+  };
+};
+
+type SkillProposalSupportFile = {
+  path: string;
+  content: string;
+};
+
+export type SkillProposalInspectResult = {
+  record: SkillProposalRecord;
+  revisionHash?: string;
+  content: string;
+  supportFiles?: SkillProposalSupportFile[];
+};
+
+export type SkillProposalEvaluateResult = {
+  record: SkillProposalRecord;
+  evaluation: SkillWorkshopEvaluation;
+};
+
+export function parseDateMs(value: string | undefined): number {
+  return parseDateStringTimestampMs(value) ?? Date.now();
+}
+
+function startOfLocalDay(ms: number): number {
+  const date = new Date(ms);
+  return new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime();
+}
+
+function recencyGroup(ms: number): SkillWorkshopProposal["recencyGroup"] {
+  const today = startOfLocalDay(Date.now());
+  const day = startOfLocalDay(ms);
+  if (day === today) {
+    return "today";
+  }
+  if (day === today - 24 * 60 * 60 * 1000) {
+    return "yesterday";
+  }
+  return "earlier";
+}
+
+function compactAgeLabel(ms: number): string {
+  const diff = Math.max(0, Date.now() - ms);
+  const min = Math.floor(diff / 60_000);
+  if (min < 1) {
+    return "now";
+  }
+  if (min < 60) {
+    return `${min}m`;
+  }
+  const hr = Math.floor(min / 60);
+  if (hr < 24) {
+    return `${hr}h`;
+  }
+  const day = Math.floor(hr / 24);
+  return `${day}d`;
+}
+
+function proposedVersionNumber(value: string | undefined): number {
+  const parsed = Number.parseInt((value ?? "").replace(/^v/i, ""), 10);
+  return Number.isFinite(parsed) && parsed > 0 ? parsed : 1;
+}
+
+function byteLength(value: string): number {
+  return new TextEncoder().encode(value).length;
+}
+
+function stripProposalFrontmatter(content: string): string {
+  return content.replace(/^---\r?\n[\s\S]*?\r?\n---\r?\n?/, "").trim();
+}
+
+function supportFilesFromInspect(
+  result: SkillProposalInspectResult,
+): SkillWorkshopProposal["supportFiles"] {
+  const sizes = new Map(
+    (result.record.supportFiles ?? []).map((file) => [file.path, file.sizeBytes]),
+  );
+  return (result.supportFiles ?? []).map((file) => ({
+    path: file.path,
+    size: formatBytes(Math.max(0, sizes.get(file.path) ?? byteLength(file.content)), {
+      fallback: "0 B",
+      maxUnit: "kilo",
+      fractionDigits: (_value, unit) => (unit === "byte" ? null : 1),
+    }),
+    contents: file.content,
+  }));
+}
+
+export function proposalFromManifest(
+  entry: SkillProposalManifestEntry,
+  previous: SkillWorkshopProposal | undefined,
+): SkillWorkshopProposal {
+  const updatedAt = parseDateMs(entry.updatedAt);
+  const createdAt = parseDateMs(entry.createdAt);
+  const previousIsCurrent = previous?.updatedAt === updatedAt;
+  return {
+    key: entry.id,
+    kind: entry.kind,
+    slug: entry.skillKey,
+    name: entry.title || entry.skillName,
+    oneLine: entry.description,
+    body: previousIsCurrent ? previous.body : "",
+    bodyLoaded: previousIsCurrent ? previous.bodyLoaded : false,
+    status: entry.status,
+    ...(previousIsCurrent && previous.origin ? { origin: previous.origin } : {}),
+    version: previousIsCurrent ? previous.version : 1,
+    revisionHash: previousIsCurrent ? previous.revisionHash : null,
+    ...(previousIsCurrent && previous.evaluation ? { evaluation: previous.evaluation } : {}),
+    createdAt,
+    updatedAt,
+    recencyGroup: recencyGroup(updatedAt || createdAt),
+    ageLabel: compactAgeLabel(updatedAt || createdAt),
+    supportFiles: previousIsCurrent ? previous.supportFiles : [],
+    isNew: previous?.isNew ?? false,
+  };
+}
+
+export function proposalFromInspect(
+  result: SkillProposalInspectResult,
+  previous: SkillWorkshopProposal | undefined,
+): SkillWorkshopProposal {
+  const record = result.record;
+  const updatedAt = parseDateMs(record.updatedAt);
+  const createdAt = parseDateMs(record.createdAt);
+  const revisionHash = result.revisionHash?.trim() || null;
+  const evaluation =
+    record.evaluation?.revisionHash === revisionHash
+      ? record.evaluation
+      : previous?.evaluation?.revisionHash === revisionHash
+        ? previous.evaluation
+        : undefined;
+  return {
+    key: record.id,
+    kind: record.kind,
+    slug: record.target.skillKey,
+    name: record.title || record.target.skillName,
+    oneLine: record.description,
+    body: stripProposalFrontmatter(result.content),
+    bodyLoaded: true,
+    status: record.status,
+    ...(record.origin ? { origin: record.origin } : {}),
+    version: proposedVersionNumber(record.proposedVersion),
+    revisionHash,
+    ...(evaluation ? { evaluation } : {}),
+    createdAt,
+    updatedAt,
+    recencyGroup: recencyGroup(updatedAt || createdAt),
+    ageLabel: compactAgeLabel(updatedAt || createdAt),
+    supportFiles: supportFilesFromInspect(result),
+    isNew: previous?.isNew ?? false,
+  };
+}
+
+export function proposalFromEvaluation(
+  result: SkillProposalEvaluateResult,
+  previous: SkillWorkshopProposal,
+): SkillWorkshopProposal {
+  const record = result.record;
+  const updatedAt = parseDateMs(record.updatedAt);
+  const createdAt = parseDateMs(record.createdAt);
+  return {
+    key: record.id,
+    kind: record.kind,
+    slug: record.target.skillKey,
+    name: record.title || record.target.skillName,
+    oneLine: record.description,
+    body: previous.body,
+    bodyLoaded: previous.bodyLoaded,
+    status: record.status,
+    ...(record.origin
+      ? { origin: record.origin }
+      : previous.origin
+        ? { origin: previous.origin }
+        : {}),
+    version: proposedVersionNumber(record.proposedVersion),
+    revisionHash: result.evaluation.revisionHash,
+    evaluation: result.evaluation,
+    createdAt,
+    updatedAt,
+    recencyGroup: recencyGroup(updatedAt || createdAt),
+    ageLabel: compactAgeLabel(updatedAt || createdAt),
+    supportFiles: previous.supportFiles,
+    isNew: previous.isNew,
+  };
+}
diff --git a/ui/src/pages/skill-workshop/proposals.test.ts b/ui/src/pages/skill-workshop/proposals.test.ts
index 861a39b3bf3d..d96ed5a8dfc0 100644
--- a/ui/src/pages/skill-workshop/proposals.test.ts
+++ b/ui/src/pages/skill-workshop/proposals.test.ts
@@ -129,6 +129,7 @@ function proposal(overrides: Partial<SkillWorkshopProposal> = {}): SkillWorkshop
     recencyGroup: "today",
     ageLabel: "now",
     supportFiles: [],
+    bodyLoaded: true,
     isNew: false,
     ...overrides,
   };
@@ -189,6 +190,37 @@ describe("Skill Workshop proposal RPCs", () => {
     expect(state.skillWorkshopProposals[0]?.kind).toBe("create");
   });
 
+  it("reports a failed inspect for a selection retained across refresh", async () => {
+    const appliedManifest = manifest("applied");
+    const latest = appliedManifest.proposals[0];
+    if (!latest) {
+      throw new Error("Expected proposal fixture");
+    }
+    const previous = {
+      ...latest,
+      id: "proposal-0",
+      updatedAt: "2026-06-15T12:00:00.000Z",
+    };
+    const { state, context, request } = createFixture({
+      skillWorkshopAgentId: "research",
+      skillWorkshopSelectedKey: "proposal-1",
+    });
+    request.mockImplementation(async (method: string) => {
+      if (method === "skills.proposals.list") {
+        return { ...appliedManifest, proposals: [latest, previous] };
+      }
+      throw new Error("inspect failed");
+    });
+
+    await loadSkillWorkshopProposals(state, context, { force: true });
+
+    expect(state.skillWorkshopSelectedKey).toBe("proposal-1");
+    expect(state.skillWorkshopError).toContain("inspect failed");
+    expect(request.mock.calls.filter(([method]) => method === "skills.proposals.inspect")).toEqual([
+      ["skills.proposals.inspect", { agentId: "research", proposalId: "proposal-1" }],
+    ]);
+  });
+
   it("preserves capped support-file size formatting through the shared helper", async () => {
     const { state, context, request } = createFixture();
     const baseInspect = inspectResult();
@@ -217,7 +249,7 @@ describe("Skill Workshop proposal RPCs", () => {
 
   it("inspects a selected proposal with the agent from the current session", async () => {
     const { state, context, request } = createFixture(
-      { skillWorkshopProposals: [proposal({ body: "" })] },
+      { skillWorkshopProposals: [proposal({ body: "", bodyLoaded: false })] },
       { sessionKey: "agent:ops-team:main" },
       ["skills.proposals.inspect"],
     );
@@ -363,7 +395,7 @@ describe("Skill Workshop proposal RPCs", () => {
     const { state, context, request } = createFixture(
       {
         skillWorkshopAgentId: "research",
-        skillWorkshopProposals: [proposal({ body: "" })],
+        skillWorkshopProposals: [proposal({ body: "", bodyLoaded: false })],
       },
       {},
       ["skills.proposals.inspect", "skills.proposals.evaluate"],
@@ -385,7 +417,7 @@ describe("Skill Workshop proposal RPCs", () => {
   it("drops an inspected evaluation that belongs to a different revision", async () => {
     const baseInspect = inspectResult();
     const { state, context, request } = createFixture(
-      { skillWorkshopProposals: [proposal({ body: "" })] },
+      { skillWorkshopProposals: [proposal({ body: "", bodyLoaded: false })] },
       {},
       ["skills.proposals.inspect"],
     );
@@ -535,7 +567,7 @@ describe("Skill Workshop proposal RPCs", () => {
     const { state, context, request } = createFixture(
       {
         skillWorkshopAgentId: "research",
-        skillWorkshopProposals: [proposal({ body: "" })],
+        skillWorkshopProposals: [proposal({ body: "", bodyLoaded: false })],
       },
       {},
       ["skills.proposals.inspect"],
@@ -584,7 +616,7 @@ describe("Skill Workshop proposal RPCs", () => {
     const { state, context, request } = createFixture(
       {
         skillWorkshopAgentId: "research",
-        skillWorkshopProposals: [proposal({ body: "" })],
+        skillWorkshopProposals: [proposal({ body: "", bodyLoaded: false })],
         skillWorkshopRevisionDraft: "Tighten the trigger.",
       },
       {},
@@ -611,7 +643,7 @@ describe("Skill Workshop proposal RPCs", () => {
     const { state, context, request } = createFixture(
       {
         skillWorkshopAgentId: "research",
-        skillWorkshopProposals: [proposal({ body: "" })],
+        skillWorkshopProposals: [proposal({ body: "", bodyLoaded: false })],
         skillWorkshopRevisionDraft: "Tighten the trigger.",
       },
       {},
@@ -634,4 +666,62 @@ describe("Skill Workshop proposal RPCs", () => {
     await expect(revision).resolves.toBe(false);
     expect(sendRevisionRequest).not.toHaveBeenCalled();
   });
+
+  it("ignores a superseded selection and keeps its error out of the pane", async () => {
+    const first = createDeferred<ReturnType<typeof inspectResult>>();
+    const second = createDeferred<ReturnType<typeof inspectResult>>();
+    const { state, context, request } = createFixture(
+      {
+        skillWorkshopAgentId: "research",
+        skillWorkshopProposals: [
+          proposal({ key: "proposal-1", body: "", bodyLoaded: false }),
+          proposal({ key: "proposal-2", body: "", bodyLoaded: false }),
+        ],
+      },
+      {},
+      ["skills.proposals.inspect"],
+    );
+    request.mockImplementation(async (_method, payload) =>
+      (payload as { proposalId: string }).proposalId === "proposal-1"
+        ? first.promise
+        : second.promise,
+    );
+
+    const stale = selectSkillWorkshopProposal(state, context, "proposal-1");
+    const latest = selectSkillWorkshopProposal(state, context, "proposal-2");
+    const base = inspectResult();
+    second.resolve({ ...base, record: { ...base.record, id: "proposal-2" } });
+    await latest;
+    first.reject(new Error("inspect failed"));
+    await stale;
+
+    expect(state.skillWorkshopSelectedKey).toBe("proposal-2");
+    expect(state.skillWorkshopError).toBeNull();
+  });
+
+  it("inspects a revision once even when its body is legitimately empty", async () => {
+    const { state, context, request } = createFixture(
+      {
+        skillWorkshopAgentId: "research",
+        skillWorkshopProposals: [proposal({ body: "", bodyLoaded: false })],
+      },
+      {},
+      ["skills.proposals.inspect"],
+    );
+    const base = inspectResult();
+    request.mockResolvedValue({ ...base, content: "" });
+
+    await Promise.all([
+      selectSkillWorkshopProposal(state, context, "proposal-1"),
+      selectSkillWorkshopProposal(state, context, "proposal-1"),
+    ]);
+    await selectSkillWorkshopProposal(state, context, "proposal-1");
+
+    expect(state.skillWorkshopProposals[0]?.body).toBe("");
+    expect(state.skillWorkshopProposals[0]?.bodyLoaded).toBe(true);
+    expect(
+      request.mock.calls.filter(([method]) => method === "skills.proposals.inspect"),
+    ).toHaveLength(1);
+    expect(state.skillWorkshopSelectedKey).toBe("proposal-1");
+  });
 });
diff --git a/ui/src/pages/skill-workshop/proposals.ts b/ui/src/pages/skill-workshop/proposals.ts
index 59fe23211f63..460dcd1a0079 100644
--- a/ui/src/pages/skill-workshop/proposals.ts
+++ b/ui/src/pages/skill-workshop/proposals.ts
@@ -1,9 +1,7 @@
 // Control UI controller manages skill workshop gateway state.
-import { parseDateStringTimestampMs } from "@openclaw/normalization-core/number-coercion";
 import type { AgentSelectionCapability } from "../../app/agent-selection.ts";
 import type { ApplicationGateway } from "../../app/context.ts";
 import { t } from "../../i18n/index.ts";
-import { formatBytes } from "../../lib/agents/display.ts";
 import { formatUiError } from "../../lib/format-error.ts";
 import { canCallGatewayMethod } from "../../lib/gateway-methods.ts";
 import {
@@ -11,12 +9,21 @@ import {
   parseAgentSessionKey,
   resolveUiSelectedGlobalAgentId,
 } from "../../lib/sessions/session-key.ts";
-import type {
-  SkillWorkshopAction,
-  SkillWorkshopEvaluation,
-  SkillWorkshopProposal,
-  SkillWorkshopProposalStatus,
+import {
+  findSkillWorkshopAppliedPredecessor,
+  type SkillWorkshopAction,
+  type SkillWorkshopProposal,
+  type SkillWorkshopProposalStatus,
 } from "../../lib/skill-workshop/index.ts";
+import {
+  parseDateMs,
+  proposalFromEvaluation,
+  proposalFromInspect,
+  proposalFromManifest,
+  type SkillProposalEvaluateResult,
+  type SkillProposalInspectResult,
+  type SkillProposalManifest,
+} from "./proposal-records.ts";
 import { createSkillWorkshopHistoryScanState, type SkillWorkshopState } from "./state.ts";
 export {
   createSkillWorkshopState,
@@ -27,77 +34,6 @@ export {
 
 const SKILL_WORKSHOP_NOTICE_MS = 2800;
 
-type SkillProposalStatus = SkillWorkshopProposalStatus;
-type SkillProposalKind = SkillWorkshopProposal["kind"];
-type SkillProposalScanState = "pending" | "clean" | "failed" | "quarantined";
-
-type SkillProposalManifestEntry = {
-  id: string;
-  kind: SkillProposalKind;
-  status: SkillProposalStatus;
-  title: string;
-  description: string;
-  skillName: string;
-  skillKey: string;
-  createdAt: string;
-  updatedAt: string;
-  scanState: SkillProposalScanState;
-};
-
-type SkillProposalManifest = {
-  schema: "openclaw.skill-workshop.proposals-manifest.v1";
-  updatedAt: string;
-  proposals: SkillProposalManifestEntry[];
-};
-
-type SkillProposalSupportFileRecord = {
-  path: string;
-  sizeBytes: number;
-};
-
-type SkillProposalOrigin = {
-  agentId?: string;
-  sessionKey?: string;
-  runId?: string;
-  messageId?: string;
-};
-
-type SkillProposalRecord = {
-  id: string;
-  kind: SkillProposalKind;
-  status: SkillProposalStatus;
-  title: string;
-  description: string;
-  createdAt: string;
-  updatedAt: string;
-  proposedVersion: string;
-  draftHash: string;
-  evaluation?: SkillWorkshopEvaluation;
-  origin?: SkillProposalOrigin;
-  supportFiles?: SkillProposalSupportFileRecord[];
-  target: {
-    skillName: string;
-    skillKey: string;
-  };
-};
-
-type SkillProposalSupportFile = {
-  path: string;
-  content: string;
-};
-
-type SkillProposalInspectResult = {
-  record: SkillProposalRecord;
-  revisionHash?: string;
-  content: string;
-  supportFiles?: SkillProposalSupportFile[];
-};
-
-type SkillProposalEvaluateResult = {
-  record: SkillProposalRecord;
-  evaluation: SkillWorkshopEvaluation;
-};
-
 export type SkillWorkshopContext = {
   gateway: ApplicationGateway;
   agentSelection: Pick<AgentSelectionCapability, "state">;
@@ -139,170 +75,10 @@ function resetSkillWorkshopAgentScope(state: SkillWorkshopState, agentId: string
   state.skillWorkshopRevisionDraft = "";
   state.skillWorkshopFilePreviewKey = null;
   state.skillWorkshopFilePreviewQuery = "";
+  state.skillWorkshopAppliedDiffMode = "changes";
   state.skillWorkshopHistoryScan = createSkillWorkshopHistoryScanState();
-}
-
-function parseDateMs(value: string | undefined): number {
-  return parseDateStringTimestampMs(value) ?? Date.now();
-}
-
-function startOfLocalDay(ms: number): number {
-  const date = new Date(ms);
-  return new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime();
-}
-
-function recencyGroup(ms: number): SkillWorkshopProposal["recencyGroup"] {
-  const today = startOfLocalDay(Date.now());
-  const day = startOfLocalDay(ms);
-  if (day === today) {
-    return "today";
-  }
-  if (day === today - 24 * 60 * 60 * 1000) {
-    return "yesterday";
-  }
-  return "earlier";
-}
-
-function compactAgeLabel(ms: number): string {
-  const diff = Math.max(0, Date.now() - ms);
-  const min = Math.floor(diff / 60_000);
-  if (min < 1) {
-    return "now";
-  }
-  if (min < 60) {
-    return `${min}m`;
-  }
-  const hr = Math.floor(min / 60);
-  if (hr < 24) {
-    return `${hr}h`;
-  }
-  const day = Math.floor(hr / 24);
-  return `${day}d`;
-}
-
-function proposedVersionNumber(value: string | undefined): number {
-  const parsed = Number.parseInt((value ?? "").replace(/^v/i, ""), 10);
-  return Number.isFinite(parsed) && parsed > 0 ? parsed : 1;
-}
-
-function byteLength(value: string): number {
-  return new TextEncoder().encode(value).length;
-}
-
-function stripProposalFrontmatter(content: string): string {
-  return content.replace(/^---\r?\n[\s\S]*?\r?\n---\r?\n?/, "").trim();
-}
-
-function supportFilesFromInspect(
-  result: SkillProposalInspectResult,
-): SkillWorkshopProposal["supportFiles"] {
-  const sizes = new Map(
-    (result.record.supportFiles ?? []).map((file) => [file.path, file.sizeBytes]),
-  );
-  return (result.supportFiles ?? []).map((file) => ({
-    path: file.path,
-    size: formatBytes(Math.max(0, sizes.get(file.path) ?? byteLength(file.content)), {
-      fallback: "0 B",
-      maxUnit: "kilo",
-      fractionDigits: (_value, unit) => (unit === "byte" ? null : 1),
-    }),
-    contents: file.content,
-  }));
-}
-
-function proposalFromManifest(
-  entry: SkillProposalManifestEntry,
-  previous: SkillWorkshopProposal | undefined,
-): SkillWorkshopProposal {
-  const updatedAt = parseDateMs(entry.updatedAt);
-  const createdAt = parseDateMs(entry.createdAt);
-  const previousIsCurrent = previous?.updatedAt === updatedAt;
-  return {
-    key: entry.id,
-    kind: entry.kind,
-    slug: entry.skillKey,
-    name: entry.title || entry.skillName,
-    oneLine: entry.description,
-    body: previousIsCurrent ? previous.body : "",
-    status: entry.status,
-    ...(previousIsCurrent && previous.origin ? { origin: previous.origin } : {}),
-    version: previousIsCurrent ? previous.version : 1,
-    revisionHash: previousIsCurrent ? previous.revisionHash : null,
-    ...(previousIsCurrent && previous.evaluation ? { evaluation: previous.evaluation } : {}),
-    createdAt,
-    updatedAt,
-    recencyGroup: recencyGroup(updatedAt || createdAt),
-    ageLabel: compactAgeLabel(updatedAt || createdAt),
-    supportFiles: previousIsCurrent ? previous.supportFiles : [],
-    isNew: previous?.isNew ?? false,
-  };
-}
-
-function proposalFromInspect(
-  result: SkillProposalInspectResult,
-  previous: SkillWorkshopProposal | undefined,
-): SkillWorkshopProposal {
-  const record = result.record;
-  const updatedAt = parseDateMs(record.updatedAt);
-  const createdAt = parseDateMs(record.createdAt);
-  const revisionHash = result.revisionHash?.trim() || null;
-  const evaluation =
-    record.evaluation?.revisionHash === revisionHash
-      ? record.evaluation
-      : previous?.evaluation?.revisionHash === revisionHash
-        ? previous.evaluation
-        : undefined;
-  return {
-    key: record.id,
-    kind: record.kind,
-    slug: record.target.skillKey,
-    name: record.title || record.target.skillName,
-    oneLine: record.description,
-    body: stripProposalFrontmatter(result.content),
-    status: record.status,
-    ...(record.origin ? { origin: record.origin } : {}),
-    version: proposedVersionNumber(record.proposedVersion),
-    revisionHash,
-    ...(evaluation ? { evaluation } : {}),
-    createdAt,
-    updatedAt,
-    recencyGroup: recencyGroup(updatedAt || createdAt),
-    ageLabel: compactAgeLabel(updatedAt || createdAt),
-    supportFiles: supportFilesFromInspect(result),
-    isNew: previous?.isNew ?? false,
-  };
-}
-
-function proposalFromEvaluation(
-  result: SkillProposalEvaluateResult,
-  previous: SkillWorkshopProposal,
-): SkillWorkshopProposal {
-  const record = result.record;
-  const updatedAt = parseDateMs(record.updatedAt);
-  const createdAt = parseDateMs(record.createdAt);
-  return {
-    key: record.id,
-    kind: record.kind,
-    slug: record.target.skillKey,
-    name: record.title || record.target.skillName,
-    oneLine: record.description,
-    body: previous.body,
-    status: record.status,
-    ...(record.origin
-      ? { origin: record.origin }
-      : previous.origin
-        ? { origin: previous.origin }
-        : {}),
-    version: proposedVersionNumber(record.proposedVersion),
-    revisionHash: result.evaluation.revisionHash,
-    evaluation: result.evaluation,
-    createdAt,
-    updatedAt,
-    recencyGroup: recencyGroup(updatedAt || createdAt),
-    ageLabel: compactAgeLabel(updatedAt || createdAt),
-    supportFiles: previous.supportFiles,
-    isNew: previous.isNew,
-  };
+  inspectRequestsByState.delete(state);
+  selectionRequestByState.delete(state);
 }
 
 function mergeProposal(state: SkillWorkshopState, proposal: SkillWorkshopProposal): void {
@@ -350,7 +126,7 @@ function showActionNotice(
 
 export function countSkillWorkshopProposals(
   proposals: SkillWorkshopProposal[],
-): Record<"all" | SkillProposalStatus, number> {
+): Record<"all" | SkillWorkshopProposalStatus, number> {
   // Applied renders one row per skill, so its tab count is grouped skills;
   // every other status stays a per-proposal count.
   const appliedSkills = new Set<string>();
@@ -409,9 +185,24 @@ export async function loadSkillWorkshopProposals(
     state.skillWorkshopLoaded = true;
     if (!proposals.some((proposal) => proposal.key === state.skillWorkshopSelectedKey)) {
       state.skillWorkshopSelectedKey = proposals[0]?.key ?? null;
+      // Only a refresh that actually reassigns the pane owns the selection
+      // fence; otherwise a background reload would silence an in-flight click.
+      if (state.skillWorkshopSelectedKey) {
+        markSkillWorkshopSelectionRequest(state, state.skillWorkshopSelectedKey);
+      }
     }
-    if (state.skillWorkshopSelectedKey) {
-      await loadSkillWorkshopProposalDetail(state, context, state.skillWorkshopSelectedKey);
+    const selectedKey = state.skillWorkshopSelectedKey;
+    if (selectedKey) {
+      // Route data retains the selection but not its ephemeral request fence.
+      if (!selectionRequestByState.has(state)) {
+        markSkillWorkshopSelectionRequest(state, selectedKey);
+      }
+      const selectedLoaded = await loadSkillWorkshopProposalDetail(state, context, selectedKey);
+      if (selectedLoaded) {
+        // The Applied tab can be opened without a fresh click, so the predecessor
+        // has to be warmed here too or the diff never has a baseline.
+        await loadSkillWorkshopPredecessorBody(state, context, selectedKey);
+      }
     }
   } catch (err) {
     state.skillWorkshopError = formatUiError(err);
@@ -423,25 +214,40 @@ export async function loadSkillWorkshopProposals(
   }
 }
 
-async function loadSkillWorkshopProposalDetail(
+type SkillWorkshopGatewayClient = NonNullable<ApplicationGateway["snapshot"]["client"]>;
+
+// Rapid history clicks overlap: each inspect awaits the Gateway, so a slower
+// earlier request must neither re-issue the same call nor publish its selection
+// or error after a newer click won the pane. Both fences are keyed on the live
+// state object so nothing reaches the persisted route data.
+const inspectRequestsByState = new WeakMap<SkillWorkshopState, Map<string, Promise<boolean>>>();
+const selectionRequestByState = new WeakMap<SkillWorkshopState, string>();
+
+function inspectRequests(state: SkillWorkshopState): Map<string, Promise<boolean>> {
+  const existing = inspectRequestsByState.get(state);
+  if (existing) {
+    return existing;
+  }
+  const requests = new Map<string, Promise<boolean>>();
+  inspectRequestsByState.set(state, requests);
+  return requests;
+}
+
+function markSkillWorkshopSelectionRequest(state: SkillWorkshopState, proposalId: string): void {
+  selectionRequestByState.set(state, proposalId);
+}
+
+function isLatestSkillWorkshopSelection(state: SkillWorkshopState, proposalId: string): boolean {
+  return selectionRequestByState.get(state) === proposalId;
+}
+
+async function inspectSkillWorkshopProposal(
   state: SkillWorkshopState,
   context: SkillWorkshopContext,
+  client: SkillWorkshopGatewayClient,
   proposalId: string,
-  options?: { force?: boolean },
+  existing: SkillWorkshopProposal | undefined,
 ): Promise<boolean> {
-  const snapshot = context.gateway.snapshot;
-  const client = snapshot.client;
-  if (
-    !client ||
-    snapshot.phase !== "connected" ||
-    state.skillWorkshopInspectingKey === proposalId
-  ) {
-    return false;
-  }
-  const existing = state.skillWorkshopProposals.find((proposal) => proposal.key === proposalId);
-  if (existing?.body && !options?.force) {
-    return true;
-  }
   const requestAgentId = loadedSkillWorkshopAgentParams(state, context).agentId;
   if (state.skillWorkshopAgentId === null) {
     state.skillWorkshopAgentId = requestAgentId;
@@ -454,16 +260,18 @@ async function loadSkillWorkshopProposalDetail(
       "skills.proposals.inspect",
       requestParams,
     );
-    if (
-      state.skillWorkshopAgentId !== requestAgentId ||
-      state.skillWorkshopInspectingKey !== proposalId
-    ) {
+    if (state.skillWorkshopAgentId !== requestAgentId) {
       return false;
     }
     mergeProposal(state, proposalFromInspect(result, existing));
     return true;
   } catch (err) {
-    if (state.skillWorkshopAgentId === requestAgentId) {
+    // Only the revision the operator is waiting on may publish an error; a
+    // superseded click or a background predecessor fetch stays quiet.
+    if (
+      state.skillWorkshopAgentId === requestAgentId &&
+      isLatestSkillWorkshopSelection(state, proposalId)
+    ) {
       state.skillWorkshopError = formatUiError(err);
     }
     return false;
@@ -477,19 +285,68 @@ async function loadSkillWorkshopProposalDetail(
   }
 }
 
+function loadSkillWorkshopProposalDetail(
+  state: SkillWorkshopState,
+  context: SkillWorkshopContext,
+  proposalId: string,
+  options?: { force?: boolean },
+): Promise<boolean> {
+  const snapshot = context.gateway.snapshot;
+  const client = snapshot.client;
+  if (!client || snapshot.phase !== "connected") {
+    return Promise.resolve(false);
+  }
+  const existing = state.skillWorkshopProposals.find((proposal) => proposal.key === proposalId);
+  if (existing?.bodyLoaded && !options?.force) {
+    return Promise.resolve(true);
+  }
+  const requests = inspectRequests(state);
+  const inFlight = requests.get(proposalId);
+  if (inFlight) {
+    return inFlight;
+  }
+  const request = inspectSkillWorkshopProposal(
+    state,
+    context,
+    client,
+    proposalId,
+    existing,
+  ).finally(() => {
+    if (requests.get(proposalId) === request) {
+      requests.delete(proposalId);
+    }
+  });
+  requests.set(proposalId, request);
+  return request;
+}
+
+function loadSkillWorkshopPredecessorBody(
+  state: SkillWorkshopState,
+  context: SkillWorkshopContext,
+  proposalId: string,
+): Promise<boolean> {
+  const previous = findSkillWorkshopAppliedPredecessor(state.skillWorkshopProposals, proposalId);
+  return previous && !previous.bodyLoaded
+    ? loadSkillWorkshopProposalDetail(state, context, previous.key)
+    : Promise.resolve(false);
+}
+
 export async function selectSkillWorkshopProposal(
   state: SkillWorkshopState,
   context: SkillWorkshopContext,
   proposalId: string,
 ): Promise<void> {
+  markSkillWorkshopSelectionRequest(state, proposalId);
   const current = state.skillWorkshopProposals.find((proposal) => proposal.key === proposalId);
-  if (!current?.body) {
+  if (!current?.bodyLoaded) {
     const loaded = await loadSkillWorkshopProposalDetail(state, context, proposalId);
-    if (!loaded) {
+    if (!loaded || !isLatestSkillWorkshopSelection(state, proposalId)) {
       return;
     }
   }
   state.skillWorkshopSelectedKey = proposalId;
+  state.skillWorkshopAppliedDiffMode = "changes";
+  await loadSkillWorkshopPredecessorBody(state, context, proposalId);
 }
 
 async function refreshAfterMutation(
diff --git a/ui/src/pages/skill-workshop/skill-workshop-page.applied.test.ts b/ui/src/pages/skill-workshop/skill-workshop-page.applied.test.ts
index be952f6870f0..915852516642 100644
--- a/ui/src/pages/skill-workshop/skill-workshop-page.applied.test.ts
+++ b/ui/src/pages/skill-workshop/skill-workshop-page.applied.test.ts
@@ -60,75 +60,98 @@ function createContext(request: ReturnType<typeof vi.fn>): ApplicationContext {
   } as unknown as ApplicationContext;
 }
 
+function appliedProposals(): SkillWorkshopProposal[] {
+  return [1, 2, 3, 4].map((updatedAt) => ({
+    key: `proposal-${updatedAt}`,
+    kind: updatedAt === 2 ? "create" : "update",
+    slug: "release-sanity",
+    name: `${updatedAt === 1 ? "Create" : "Update"} release-sanity`,
+    oneLine: `Revision ${updatedAt} description`,
+    body: updatedAt === 1 ? "" : `## Workflow\n- Revision ${updatedAt}`,
+    status: "applied",
+    version: 1,
+    revisionHash: null,
+    createdAt: updatedAt,
+    updatedAt,
+    recencyGroup: "today",
+    ageLabel: `${updatedAt}h`,
+    supportFiles: [],
+    bodyLoaded: updatedAt !== 1,
+    isNew: false,
+  }));
+}
+
+function inspectRequest() {
+  return vi.fn(async (method: string, params?: unknown) => {
+    if (method !== "skills.proposals.inspect") {
+      return {};
+    }
+    expect(params).toEqual({ agentId: "research", proposalId: "proposal-1" });
+    return {
+      record: {
+        id: "proposal-1",
+        kind: "update",
+        status: "applied",
+        title: "Create release-sanity",
+        description: "Revision 1 description",
+        createdAt: new Date(1).toISOString(),
+        updatedAt: new Date(1).toISOString(),
+        proposedVersion: "v1",
+        draftHash: "a".repeat(64),
+        target: { skillName: "Release sanity", skillKey: "release-sanity" },
+      },
+      revisionHash: "b".repeat(64),
+      content: "## Workflow\n- Revision 1 inspected",
+      supportFiles: [],
+    };
+  });
+}
+
+async function mountAppliedPage(
+  request: ReturnType<typeof inspectRequest>,
+  proposals: SkillWorkshopProposal[],
+): Promise<SkillWorkshopPageTestElement> {
+  const loadedState = createSkillWorkshopState();
+  loadedState.skillWorkshopAgentId = "research";
+  loadedState.skillWorkshopLoaded = true;
+  loadedState.skillWorkshopProposals = proposals;
+  loadedState.skillWorkshopSelectedKey = "proposal-4";
+  // SAFETY: the registered custom element exposes the tested reactive page fields.
+  const page = document.createElement(
+    "openclaw-skill-workshop-page",
+  ) as SkillWorkshopPageTestElement;
+  page.data = skillWorkshopRouteData(loadedState);
+  page.context = createContext(request);
+  document.body.append(page);
+  await page.updateComplete;
+  if (!page.state) {
+    throw new Error("Expected Skill Workshop state");
+  }
+  page.state.skillWorkshopMode = "board";
+  page.state.skillWorkshopStatusFilter = "applied";
+  page.requestUpdate();
+  await page.updateComplete;
+  return page;
+}
+
+function historyItems(page: SkillWorkshopPageTestElement) {
+  return page.querySelectorAll<HTMLButtonElement>(".sw-applied-history__item");
+}
+
+function modeButton(page: SkillWorkshopPageTestElement, label: string) {
+  return [...page.querySelectorAll<HTMLButtonElement>(".sw-body-mode__button")].find(
+    (button) => button.textContent?.trim() === label,
+  );
+}
+
 afterEach(() => {
   document.body.replaceChildren();
 });
 
 describe("Skill Workshop applied history", () => {
   it("renders one skill row and inspects a selected revision", async () => {
-    const timestamps = [1, 2, 3, 4];
-    const proposals = timestamps.map(
-      (updatedAt): SkillWorkshopProposal => ({
-        key: `proposal-${updatedAt}`,
-        kind: updatedAt === 2 ? "create" : "update",
-        slug: "release-sanity",
-        name: `${updatedAt === 1 ? "Create" : "Update"} release-sanity`,
-        oneLine: `Revision ${updatedAt} description`,
-        body: updatedAt === 1 ? "" : `## Workflow\n- Revision ${updatedAt}`,
-        status: "applied",
-        version: 1,
-        revisionHash: null,
-        createdAt: updatedAt,
-        updatedAt,
-        recencyGroup: "today",
-        ageLabel: `${updatedAt}h`,
-        supportFiles: [],
-        isNew: false,
-      }),
-    );
-    const request = vi.fn(async (method: string, params?: unknown) => {
-      if (method !== "skills.proposals.inspect") {
-        return {};
-      }
-      expect(params).toEqual({ agentId: "research", proposalId: "proposal-1" });
-      return {
-        record: {
-          id: "proposal-1",
-          kind: "update",
-          status: "applied",
-          title: "Create release-sanity",
-          description: "Revision 1 description",
-          createdAt: new Date(1).toISOString(),
-          updatedAt: new Date(1).toISOString(),
-          proposedVersion: "v1",
-          draftHash: "a".repeat(64),
-          target: { skillName: "Release sanity", skillKey: "release-sanity" },
-        },
-        revisionHash: "b".repeat(64),
-        content: "## Workflow\n- Revision 1 inspected",
-        supportFiles: [],
-      };
-    });
-    const loadedState = createSkillWorkshopState();
-    loadedState.skillWorkshopAgentId = "research";
-    loadedState.skillWorkshopLoaded = true;
-    loadedState.skillWorkshopProposals = proposals;
-    loadedState.skillWorkshopSelectedKey = "proposal-4";
-    // SAFETY: the registered custom element exposes the tested reactive page fields.
-    const page = document.createElement(
-      "openclaw-skill-workshop-page",
-    ) as SkillWorkshopPageTestElement;
-    page.data = skillWorkshopRouteData(loadedState);
-    page.context = createContext(request);
-    document.body.append(page);
-    await page.updateComplete;
-    if (!page.state) {
-      throw new Error("Expected Skill Workshop state");
-    }
-    page.state.skillWorkshopMode = "board";
-    page.state.skillWorkshopStatusFilter = "applied";
-    page.requestUpdate();
-    await page.updateComplete;
+    const request = inspectRequest();
+    const page = await mountAppliedPage(request, appliedProposals());
 
     expect(page.querySelectorAll(".sw-row")).toHaveLength(1);
     expect(page.querySelector(".sw-row")?.textContent).toContain("4 revisions");
@@ -137,11 +160,8 @@ describe("Skill Workshop applied history", () => {
       button.textContent?.includes("Applied"),
     );
     expect(appliedFilter?.querySelector(".settings-count")?.textContent).toBe("1");
-    await vi.waitFor(
-      () => expect(page.querySelectorAll(".sw-applied-history__item")).toHaveLength(4),
-      { interval: 1 },
-    );
-    const history = page.querySelectorAll<HTMLButtonElement>(".sw-applied-history__item");
+    await vi.waitFor(() => expect(historyItems(page)).toHaveLength(4), { interval: 1 });
+    const history = historyItems(page);
     expect(history[0]?.textContent).toContain("Update");
     expect(history[0]?.textContent).toContain("v4");
     expect(history[2]?.textContent).toContain("Create");
@@ -163,4 +183,69 @@ describe("Skill Workshop applied history", () => {
       { interval: 1 },
     );
   });
+
+  it("diffs a revision against its predecessor and toggles back to the full body", async () => {
+    const page = await mountAppliedPage(inspectRequest(), appliedProposals());
+    await vi.waitFor(() => expect(historyItems(page)).toHaveLength(4), { interval: 1 });
+
+    await vi.waitFor(() => expect(page.querySelector(".sw-diff")).not.toBeNull(), { interval: 1 });
+    const added = [...page.querySelectorAll(".sw-diff__row--add")].map((row) => row.textContent);
+    const removed = [...page.querySelectorAll(".sw-diff__row--del")].map((row) => row.textContent);
+    expect(added.join("")).toContain("Revision 4");
+    expect(removed.join("")).toContain("Revision 3");
+    expect(page.querySelector(".sw-diff__stat")?.textContent?.replace(/\s+/gu, "")).toBe("+1-1");
+
+    modeButton(page, "Full body")?.click();
+    await vi.waitFor(
+      () => {
+        expect(page.querySelector(".sw-diff")).toBeNull();
+        expect(page.querySelector(".sw-body-card")?.textContent).toContain("Revision 4");
+      },
+      { interval: 1 },
+    );
+    expect(modeButton(page, "Full body")?.getAttribute("aria-pressed")).toBe("true");
+    expect(modeButton(page, "Changes")?.getAttribute("aria-pressed")).toBe("false");
+  });
+
+  it("shows the oldest revision as a full body with no diff toggle", async () => {
+    const page = await mountAppliedPage(inspectRequest(), appliedProposals());
+    await vi.waitFor(() => expect(historyItems(page)).toHaveLength(4), { interval: 1 });
+
+    historyItems(page)[3]?.click();
+    await vi.waitFor(
+      () => {
+        expect(page.querySelector(".sw-detail__body")?.textContent).toContain(
+          "Revision 1 inspected",
+        );
+        expect(page.querySelector(".sw-body-mode")).toBeNull();
+        expect(page.querySelector(".sw-diff")).toBeNull();
+      },
+      { interval: 1 },
+    );
+  });
+
+  it("bounds large comparisons and keeps the full body available", async () => {
+    const largeBody = "x".repeat(60_001);
+    const proposals = appliedProposals();
+    for (const proposal of proposals.slice(2)) {
+      proposal.body = largeBody;
+    }
+    const page = await mountAppliedPage(inspectRequest(), proposals);
+
+    await vi.waitFor(
+      () => {
+        expect(page.querySelector(".sw-diff")).toBeNull();
+        expect(page.querySelector(".sw-body-card")?.textContent).toContain(
+          "This comparison is too large to show here.",
+        );
+      },
+      { interval: 1 },
+    );
+
+    modeButton(page, "Full body")?.click();
+    await vi.waitFor(
+      () => expect(page.querySelector(".sw-body-card")?.textContent).toContain(largeBody),
+      { interval: 1 },
+    );
+  });
 });
diff --git a/ui/src/pages/skill-workshop/skill-workshop-page.test.ts b/ui/src/pages/skill-workshop/skill-workshop-page.test.ts
index 3a8c4e3f0adc..912118528ef8 100644
--- a/ui/src/pages/skill-workshop/skill-workshop-page.test.ts
+++ b/ui/src/pages/skill-workshop/skill-workshop-page.test.ts
@@ -127,6 +127,7 @@ function createProposal(overrides: Partial<SkillWorkshopProposal>): SkillWorksho
     recencyGroup: "today",
     ageLabel: "now",
     supportFiles: [],
+    bodyLoaded: true,
     isNew: false,
     ...overrides,
   };
diff --git a/ui/src/pages/skill-workshop/skill-workshop-page.ts b/ui/src/pages/skill-workshop/skill-workshop-page.ts
index e870c788fae4..65d7048a4633 100644
--- a/ui/src/pages/skill-workshop/skill-workshop-page.ts
+++ b/ui/src/pages/skill-workshop/skill-workshop-page.ts
@@ -8,7 +8,10 @@ import "../../components/tooltip.ts";
 import { t } from "../../i18n/index.ts";
 import { sessionNavigationTarget } from "../../lib/sessions/route-navigation.ts";
 import { normalizeAgentId } from "../../lib/sessions/session-key.ts";
-import { filterSkillWorkshopProposals } from "../../lib/skill-workshop/index.ts";
+import {
+  filterSkillWorkshopProposals,
+  type SkillWorkshopAppliedDiffMode,
+} from "../../lib/skill-workshop/index.ts";
 import { OpenClawLightDomElement } from "../../lit/openclaw-element.ts";
 import { SubscriptionsController } from "../../lit/subscriptions-controller.ts";
 import { PLUGINS_HUB_PANEL_ID, pluginsHubTabs } from "../plugins/plugins-hub.ts";
@@ -145,6 +148,7 @@ function renderSkillWorkshopPage(
               inspectingKey: state.skillWorkshopInspectingKey,
               proposals: state.skillWorkshopProposals,
               selectedKey: state.skillWorkshopSelectedKey,
+              appliedDiffMode: state.skillWorkshopAppliedDiffMode,
               statusFilter: state.skillWorkshopStatusFilter,
               query: state.skillWorkshopQuery,
               filePreviewKey: state.skillWorkshopFilePreviewKey,
@@ -195,6 +199,10 @@ function renderSkillWorkshopPage(
               },
               onModeChange: (mode) => setSkillWorkshopMode(state, mode, requestUpdate),
               onSelect: selectProposal,
+              onAppliedDiffModeChange: (mode: SkillWorkshopAppliedDiffMode) => {
+                state.skillWorkshopAppliedDiffMode = mode;
+                requestUpdate();
+              },
               onPrev: () => selectRelativeProposal(-1),
               onNext: () => selectRelativeProposal(1),
               onApply: (key) => {
diff --git a/ui/src/pages/skill-workshop/state.ts b/ui/src/pages/skill-workshop/state.ts
index 83662e6a4d0a..f7f7fc1c6350 100644
--- a/ui/src/pages/skill-workshop/state.ts
+++ b/ui/src/pages/skill-workshop/state.ts
@@ -1,6 +1,7 @@
 import type {
   SkillWorkshopAction,
   SkillWorkshopActionNotice,
+  SkillWorkshopAppliedDiffMode,
   SkillWorkshopMode,
   SkillWorkshopProposal,
   SkillWorkshopStatusFilter,
@@ -45,6 +46,7 @@ export type SkillWorkshopState = {
   skillWorkshopInspectingKey: string | null;
   skillWorkshopProposals: SkillWorkshopProposal[];
   skillWorkshopSelectedKey: string | null;
+  skillWorkshopAppliedDiffMode: SkillWorkshopAppliedDiffMode;
   skillWorkshopActionBusy: { key: string; action: SkillWorkshopAction } | null;
   skillWorkshopActionNotice: SkillWorkshopActionNotice | null;
   skillWorkshopActionNoticeTimer?: ReturnType<typeof globalThis.setTimeout> | number | null;
@@ -85,6 +87,7 @@ export function createSkillWorkshopState(data?: SkillWorkshopRouteData): SkillWo
     skillWorkshopInspectingKey: data?.skillWorkshopInspectingKey ?? null,
     skillWorkshopProposals: data?.skillWorkshopProposals ?? [],
     skillWorkshopSelectedKey: data?.skillWorkshopSelectedKey ?? null,
+    skillWorkshopAppliedDiffMode: "changes",
     skillWorkshopActionBusy: data?.skillWorkshopActionBusy ?? null,
     skillWorkshopActionNotice: data?.skillWorkshopActionNotice ?? null,
     skillWorkshopActionNoticeTimer: null,
diff --git a/ui/src/pages/skill-workshop/view-types.ts b/ui/src/pages/skill-workshop/view-types.ts
index 6743d57a7b3c..3fae479bdd11 100644
--- a/ui/src/pages/skill-workshop/view-types.ts
+++ b/ui/src/pages/skill-workshop/view-types.ts
@@ -1,6 +1,7 @@
 import type {
   SkillWorkshopActionBusy,
   SkillWorkshopActionNotice,
+  SkillWorkshopAppliedDiffMode,
   SkillWorkshopMode,
   SkillWorkshopProposal,
   SkillWorkshopStatusFilter,
@@ -16,6 +17,7 @@ export type SkillWorkshopProps = {
   inspectingKey: string | null;
   proposals: SkillWorkshopProposal[];
   selectedKey: string | null;
+  appliedDiffMode: SkillWorkshopAppliedDiffMode;
   statusFilter: SkillWorkshopStatusFilter;
   query: string;
   filePreviewKey: string | null;
@@ -38,6 +40,7 @@ export type SkillWorkshopProps = {
   onQueueWidthChange: (width: number) => void;
   onModeChange: (mode: SkillWorkshopMode) => void;
   onSelect: (key: string) => void;
+  onAppliedDiffModeChange: (mode: SkillWorkshopAppliedDiffMode) => void;
   onPrev: () => void;
   onNext: () => void;
   onApply: (key: string) => void;
diff --git a/ui/src/pages/skill-workshop/view.ts b/ui/src/pages/skill-workshop/view.ts
index 92624caabc36..d9e48351abbd 100644
--- a/ui/src/pages/skill-workshop/view.ts
+++ b/ui/src/pages/skill-workshop/view.ts
@@ -14,6 +14,7 @@ import "../../styles/skill-workshop.css";
 import {
   filterSkillWorkshopProposals,
   type SkillWorkshopActionNotice,
+  type SkillWorkshopAppliedDiffMode,
   type SkillWorkshopAppliedSkill,
   type SkillWorkshopEvaluation,
   type SkillWorkshopEvaluationFinding,
@@ -21,7 +22,13 @@ import {
   type SkillWorkshopProposal,
   type SkillWorkshopStatusFilter,
 } from "../../lib/skill-workshop/index.ts";
-import { renderLazyAppliedHistory, resolveAppliedHistory } from "./applied-history.ts";
+import {
+  renderLazyAppliedHistory,
+  renderLazyAppliedRevisionDiff,
+  resolveAppliedBodyView,
+  resolveAppliedHistory,
+  type SkillWorkshopBodyView,
+} from "./applied-history.ts";
 import { renderBoardEmptyDetail, renderWorkshopEmptyState } from "./empty-states.ts";
 import { renderSkillWorkshopHistoryScan } from "./history-scan.ts";
 import { renderSkillWorkshopProposalList } from "./proposal-list.ts";
@@ -309,6 +316,53 @@ function renderLifecycleTabs(props: SkillWorkshopProps) {
   `;
 }
 
+function renderBodyModeButton(
+  props: SkillWorkshopProps,
+  mode: SkillWorkshopAppliedDiffMode,
+  label: string,
+) {
+  const active = props.appliedDiffMode === mode;
+  return html`
+    <button
+      class="sw-body-mode__button ${active ? "is-active" : ""}"
+      aria-pressed=${active ? "true" : "false"}
+      @click=${() => props.onAppliedDiffModeChange(mode)}
+    >
+      ${label}
+    </button>
+  `;
+}
+
+function renderBodyModeToggle(props: SkillWorkshopProps) {
+  return html`
+    <div class="sw-body-mode" role="group" aria-label=${t("skillWorkshop.diff.viewLabel")}>
+      ${renderBodyModeButton(props, "changes", t("skillWorkshop.diff.changes"))}
+      ${renderBodyModeButton(props, "full", t("skillWorkshop.diff.fullBody"))}
+    </div>
+  `;
+}
+
+function renderRevisionBody(view: SkillWorkshopBodyView, proposal: SkillWorkshopProposal) {
+  if (view.kind === "diff") {
+    return renderLazyAppliedRevisionDiff(view.previous.body, proposal.body);
+  }
+  if (view.kind === "loadingPrevious") {
+    return html`<p class="sw-muted" aria-busy="true">
+      ${t("skillWorkshop.diff.loadingPrevious")}
+    </p>`;
+  }
+  if (view.kind === "previousUnavailable") {
+    return html`
+      <p class="sw-muted">${t("skillWorkshop.diff.previousUnavailable")}</p>
+      ${renderProposalBody(proposal.body)}
+    `;
+  }
+  if (view.kind === "tooLarge") {
+    return html`<p class="sw-muted">${t("skillWorkshop.diff.tooLarge")}</p>`;
+  }
+  return renderProposalBody(proposal.body);
+}
+
 function renderDetail(
   props: SkillWorkshopProps,
   proposal: SkillWorkshopProposal,
@@ -319,8 +373,12 @@ function renderDetail(
   const createdLabel = editedAt
     ? t("skillWorkshop.detail.edited", { time: formatRelative(editedAt) })
     : t("skillWorkshop.detail.created", { time: formatRelative(proposal.createdAt) });
-  const detailLoading = props.inspectingKey === proposal.key && !proposal.body;
+  const detailLoading = props.inspectingKey === proposal.key && !proposal.bodyLoaded;
   const firstSupportFile = proposal.supportFiles[0];
+  const previousRevision =
+    appliedSkill?.revisions.find(({ proposal: revision }) => revision.key === proposal.key)
+      ?.previous ?? null;
+  const bodyView = resolveAppliedBodyView(props, proposal, previousRevision);
 
   return html`
     <div class="sw-detail">
@@ -359,10 +417,13 @@ function renderDetail(
 
       <div class="sw-detail__body">
         <div class="sw-body-card">
-          <h1>${proposal.slug}</h1>
+          <div class="sw-body-card__head">
+            <h1>${proposal.slug}</h1>
+            ${previousRevision ? renderBodyModeToggle(props) : nothing}
+          </div>
           ${detailLoading
             ? html`<p class="sw-muted">${t("skillWorkshop.detail.loading")}</p>`
-            : renderProposalBody(proposal.body)}
+            : renderRevisionBody(bodyView, proposal)}
         </div>
 
         ${appliedSkill ? renderLazyAppliedHistory(props, appliedSkill) : nothing}
diff --git a/ui/src/styles/skill-workshop.css b/ui/src/styles/skill-workshop.css
index 9155e7cec0b4..37d594566a88 100644
--- a/ui/src/styles/skill-workshop.css
+++ b/ui/src/styles/skill-workshop.css
@@ -603,8 +603,110 @@
   line-height: 1.65;
 }
 
+.sw-body-card__head {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 12px;
+  flex-wrap: wrap;
+  margin-bottom: 14px;
+}
+
+.sw-body-mode {
+  display: inline-flex;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-md);
+  overflow: hidden;
+}
+
+.sw-body-mode__button {
+  border: 0;
+  background: transparent;
+  color: var(--muted);
+  font-size: 11.5px;
+  font-weight: 600;
+  padding: 4px 10px;
+  cursor: var(--cursor-action);
+}
+
+.sw-body-mode__button:hover {
+  background: var(--bg-hover);
+  color: var(--text);
+}
+
+.sw-body-mode__button.is-active {
+  background: color-mix(in srgb, var(--accent) 12%, var(--bg) 88%);
+  color: var(--text-strong);
+}
+
+.sw-diff__stat {
+  display: flex;
+  gap: 10px;
+  margin: 0 0 8px;
+  font-family: var(--mono);
+  font-size: 11.5px;
+  font-weight: 600;
+}
+
+.sw-diff__stat-add {
+  color: var(--ok);
+}
+
+.sw-diff__stat-del {
+  color: var(--danger);
+}
+
+.sw-diff__rows {
+  border: 1px solid var(--border);
+  border-radius: var(--radius-md);
+  overflow: auto;
+  font-family: var(--mono);
+  font-size: 11.5px;
+  line-height: 1.55;
+}
+
+.sw-diff__row {
+  display: flex;
+  gap: 8px;
+  padding: 0 10px;
+  white-space: pre-wrap;
+  word-break: break-word;
+}
+
+.sw-diff__row--add {
+  background: var(--ok-subtle);
+  color: var(--text);
+}
+
+.sw-diff__row--del {
+  background: var(--danger-subtle);
+  color: var(--text);
+}
+
+.sw-diff__row--ctx {
+  color: var(--muted);
+}
+
+.sw-diff__row--skip {
+  border-top: 1px solid var(--border);
+  border-bottom: 1px solid var(--border);
+  background: var(--bg-elevated);
+  color: var(--muted);
+  padding: 2px 10px;
+}
+
+.sw-diff__sign {
+  flex: 0 0 auto;
+  width: 8px;
+  color: var(--muted);
+}
+
+.sw-diff__text {
+  flex: 1 1 auto;
+}
+
 .sw-body-card h1 {
-  margin: 0 0 14px;
+  margin: 0;
   font-size: 20px;
   color: var(--text-strong);
   font-weight: 700;