diff --git a/CHANGELOG.md b/CHANGELOG.md
index ad1d2d6bcb5..d9bfbb23ade 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,7 +25,7 @@ Docs: https://docs.openclaw.ai
 - Gateway/device pairing: restrict non-admin paired-device sessions (device-token auth) to their own pairing list, approve, and reject actions so a paired device cannot enumerate other devices or approve/reject pairing requests authored by another device. Admin and shared-secret operator sessions retain full visibility. (#69375) Thanks @eleqtrizit.
 - Agents/gateway tool: extend the agent-facing `gateway` tool's config mutation guard so model-driven `config.patch` and `config.apply` cannot rewrite operator-trusted paths (sandbox, plugin trust, gateway auth/TLS, hook routing and tokens, SSRF policy, MCP servers, workspace filesystem hardening) and cannot bypass the guard by editing per-agent sandbox, tools, or embedded-Pi overrides in place under `agents.list[]`. (#69377) Thanks @eleqtrizit.
 - Gateway/websocket broadcasts: require `operator.read` (or higher) for chat, agent, and tool-result event frames so pairing-scoped and node-role sessions no longer passively receive session chat content, and scope-gate unknown broadcast events by default. Plugin-defined `plugin.*` broadcasts are scoped to operator.write/admin, and status/transport events (`heartbeat`, `presence`, `tick`, etc.) remain unrestricted. Per-client sequence numbers preserve per-connection monotonicity. (#69373) Thanks @eleqtrizit.
-
+- Agents/compaction: always reload embedded Pi resources through an explicit loader and reapply reserve-token overrides so runs without extension factories no longer silently lose compaction settings before session start. (#67146) Thanks @ly85206559.
 ## 2026.4.20
 
 ### Changes
diff --git a/src/agents/pi-embedded-runner/compact.ts b/src/agents/pi-embedded-runner/compact.ts
index a7b10aced41..39948d67111 100644
--- a/src/agents/pi-embedded-runner/compact.ts
+++ b/src/agents/pi-embedded-runner/compact.ts
@@ -70,6 +70,7 @@ import {
   consumeCompactionSafeguardCancelReason,
   setCompactionSafeguardCancelReason,
 } from "../pi-hooks/compaction-safeguard-runtime.js";
+import { applyPiCompactionSettingsFromConfig } from "../pi-settings.js";
 import { createPreparedEmbeddedPiSettingsManager } from "../pi-project-settings.js";
 import { createOpenClawCodingTools } from "../pi-tools.js";
 import { wrapStreamFnTextTransforms } from "../plugin-text-transforms.js";
@@ -823,18 +824,20 @@ export async function compactEmbeddedPiSessionDirect(
         modelId,
         model,
       });
-      // Only create an explicit resource loader when there are extension factories
-      // to register; otherwise let createAgentSession use its built-in default.
-      let resourceLoader: DefaultResourceLoader | undefined;
-      if (extensionFactories.length > 0) {
-        resourceLoader = new DefaultResourceLoader({
-          cwd: resolvedWorkspace,
-          agentDir,
-          settingsManager,
-          extensionFactories,
-        });
-        await resourceLoader.reload();
-      }
+      const resourceLoader = new DefaultResourceLoader({
+        cwd: resolvedWorkspace,
+        agentDir,
+        settingsManager,
+        extensionFactories,
+      });
+      await resourceLoader.reload();
+      // DefaultResourceLoader.reload() rehydrates settings from disk and can drop OpenClaw
+      // compaction overrides applied in createPreparedEmbeddedPiSettingsManager.
+      applyPiCompactionSettingsFromConfig({
+        settingsManager,
+        cfg: params.config,
+        contextTokenBudget: ctxInfo.tokens,
+      });
 
       const { builtInTools, customTools } = splitSdkTools({
         tools: effectiveTools,
diff --git a/src/agents/pi-embedded-runner/run/attempt.spawn-workspace.resource-loader.test.ts b/src/agents/pi-embedded-runner/run/attempt.spawn-workspace.resource-loader.test.ts
new file mode 100644
index 00000000000..cda4d3d7d80
--- /dev/null
+++ b/src/agents/pi-embedded-runner/run/attempt.spawn-workspace.resource-loader.test.ts
@@ -0,0 +1,43 @@
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import {
+  cleanupTempPaths,
+  createContextEngineAttemptRunner,
+  getHoisted,
+  resetEmbeddedAttemptHarness,
+} from "./attempt.spawn-workspace.test-support.js";
+
+const hoisted = getHoisted();
+
+describe("runEmbeddedAttempt resource loader wiring", () => {
+  const tempPaths: string[] = [];
+
+  beforeEach(() => {
+    resetEmbeddedAttemptHarness();
+  });
+
+  afterEach(async () => {
+    await cleanupTempPaths(tempPaths);
+  });
+
+  it("passes an explicit resourceLoader to createAgentSession even without extension factories", async () => {
+    await createContextEngineAttemptRunner({
+      sessionKey: "agent:main:discord:dm:test-resource-loader",
+      tempPaths,
+      contextEngine: {
+        assemble: async ({ messages }) => ({
+          messages,
+          estimatedTokens: 1,
+        }),
+      },
+    });
+
+    expect(hoisted.createAgentSessionMock).toHaveBeenCalled();
+    expect(hoisted.createAgentSessionMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        resourceLoader: expect.objectContaining({
+          reload: expect.any(Function),
+        }),
+      }),
+    );
+  });
+});
diff --git a/src/agents/pi-embedded-runner/run/attempt.spawn-workspace.test-support.ts b/src/agents/pi-embedded-runner/run/attempt.spawn-workspace.test-support.ts
index 9aa30e1db83..b760e74ebd0 100644
--- a/src/agents/pi-embedded-runner/run/attempt.spawn-workspace.test-support.ts
+++ b/src/agents/pi-embedded-runner/run/attempt.spawn-workspace.test-support.ts
@@ -284,6 +284,13 @@ vi.mock("../../pi-project-settings.js", () => ({
 
 vi.mock("../../pi-settings.js", () => ({
   applyPiAutoCompactionGuard: () => {},
+  applyPiCompactionSettingsFromConfig: () => ({
+    didOverride: false,
+    compaction: {
+      reserveTokens: 0,
+      keepRecentTokens: 40_000,
+    },
+  }),
 }));
 
 vi.mock("../extensions.js", () => ({
diff --git a/src/agents/pi-embedded-runner/run/attempt.ts b/src/agents/pi-embedded-runner/run/attempt.ts
index ef5f969fa9a..20685b2d1f3 100644
--- a/src/agents/pi-embedded-runner/run/attempt.ts
+++ b/src/agents/pi-embedded-runner/run/attempt.ts
@@ -79,8 +79,11 @@ import {
   resolveBootstrapTotalMaxChars,
 } from "../../pi-embedded-helpers.js";
 import { subscribeEmbeddedPiSession } from "../../pi-embedded-subscribe.js";
+import {
+  applyPiAutoCompactionGuard,
+  applyPiCompactionSettingsFromConfig,
+} from "../../pi-settings.js";
 import { createPreparedEmbeddedPiSettingsManager } from "../../pi-project-settings.js";
-import { applyPiAutoCompactionGuard } from "../../pi-settings.js";
 import {
   createClientToolNameConflictError,
   findClientToolNameConflicts,
@@ -1019,18 +1022,20 @@ export async function runEmbeddedAttempt(
         modelId: params.modelId,
         model: params.model,
       });
-      // Only create an explicit resource loader when there are extension factories
-      // to register; otherwise let createAgentSession use its built-in default.
-      let resourceLoader: DefaultResourceLoader | undefined;
-      if (extensionFactories.length > 0) {
-        resourceLoader = new DefaultResourceLoader({
-          cwd: resolvedWorkspace,
-          agentDir,
-          settingsManager,
-          extensionFactories,
-        });
-        await resourceLoader.reload();
-      }
+      const resourceLoader = new DefaultResourceLoader({
+        cwd: resolvedWorkspace,
+        agentDir,
+        settingsManager,
+        extensionFactories,
+      });
+      await resourceLoader.reload();
+      // DefaultResourceLoader.reload() rehydrates settings from disk and can drop OpenClaw
+      // compaction overrides applied in createPreparedEmbeddedPiSettingsManager.
+      applyPiCompactionSettingsFromConfig({
+        settingsManager,
+        cfg: params.config,
+        contextTokenBudget: params.contextTokenBudget,
+      });
 
       // Get hook runner early so it's available when creating tools
       const hookRunner = getGlobalHookRunner();
diff --git a/src/agents/pi-settings.test.ts b/src/agents/pi-settings.test.ts
index 879dafe7399..4214549e3b3 100644
--- a/src/agents/pi-settings.test.ts
+++ b/src/agents/pi-settings.test.ts
@@ -23,6 +23,39 @@ describe("applyPiCompactionSettingsFromConfig", () => {
     });
   });
 
+  it("can restore reserveTokens after a simulated resource loader reload drops them below floor", () => {
+    const cfg = {
+      agents: { defaults: { compaction: { reserveTokensFloor: DEFAULT_PI_COMPACTION_RESERVE_TOKENS_FLOOR } } },
+    } as const;
+    let reserve = 16_384;
+    const keep = 20_000;
+    const settingsManager = {
+      getCompactionReserveTokens: () => reserve,
+      getCompactionKeepRecentTokens: () => keep,
+      applyOverrides: vi.fn((overrides: { compaction: { reserveTokens?: number } }) => {
+        if (overrides.compaction.reserveTokens !== undefined) {
+          reserve = overrides.compaction.reserveTokens;
+        }
+      }),
+    };
+
+    const first = applyPiCompactionSettingsFromConfig({
+      settingsManager,
+      cfg,
+      contextTokenBudget: 100_000,
+    });
+    expect(first.compaction.reserveTokens).toBe(DEFAULT_PI_COMPACTION_RESERVE_TOKENS_FLOOR);
+
+    reserve = 16_384;
+    const second = applyPiCompactionSettingsFromConfig({
+      settingsManager,
+      cfg,
+      contextTokenBudget: 100_000,
+    });
+    expect(second.compaction.reserveTokens).toBe(DEFAULT_PI_COMPACTION_RESERVE_TOKENS_FLOOR);
+    expect(reserve).toBe(DEFAULT_PI_COMPACTION_RESERVE_TOKENS_FLOOR);
+  });
+
   it("does not override when already above floor and not in safeguard mode", () => {
     const settingsManager = {
       getCompactionReserveTokens: () => 32_000,