diff --git a/CHANGELOG.md b/CHANGELOG.md
index 263cd9b73d5..598ce514916 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -65,6 +65,7 @@ Docs: https://docs.openclaw.ai
 - Config/$schema: preserve root-authored `$schema` during partial config rewrites without injecting include-only schema URLs into the root config. (#47322) Thanks @EfeDurmaz16.
 - Agents/CLI delivery: run the same reply-media path normalizer the auto-reply flow uses before shipping `openclaw agent --deliver` payloads, so relative `MEDIA:./out/photo.png` tokens resolve against the agent workspace instead of being rejected downstream with `LocalMediaAccessError: Local media path is not under an allowed directory`. Thanks @frankekn.
 - Agents/Google: strip `thinkingBudget=0` for the thinking-required `gemini-2.5-pro` model in embedded-runner and native Google payloads, so requests no longer fail with `Budget 0 is invalid. This model only works in thinking mode.` and the API uses its default thinking behavior instead. (#68607) Thanks @josmithiii.
+- Slack/threads: log failed thread starter and history fetches at verbose level while preserving best-effort fallback behavior, so missing Slack thread context is diagnosable without interrupting inbound handling. (#68594) Thanks @martingarramon.
 
 ## 2026.4.15
 
diff --git a/extensions/slack/src/monitor/media.test.ts b/extensions/slack/src/monitor/media.test.ts
index 45c154a22cc..f543ef2375b 100644
--- a/extensions/slack/src/monitor/media.test.ts
+++ b/extensions/slack/src/monitor/media.test.ts
@@ -895,7 +895,13 @@ describe("resolveSlackThreadStarter", () => {
       client,
     });
 
-    expect(result).toEqual({ text: "hello thread", userId: "U1", botId: undefined, ts: "1.000", files: undefined });
+    expect(result).toEqual({
+      text: "hello thread",
+      userId: "U1",
+      botId: undefined,
+      ts: "1.000",
+      files: undefined,
+    });
     expect(vi.mocked(logVerbose)).not.toHaveBeenCalled();
   });
 
diff --git a/extensions/slack/src/monitor/media.ts b/extensions/slack/src/monitor/media.ts
index d9a59996cac..2743f8e48c2 100644
--- a/extensions/slack/src/monitor/media.ts
+++ b/extensions/slack/src/monitor/media.ts
@@ -1,4 +1,5 @@
 import type { WebClient as SlackWebClient } from "@slack/web-api";
+import { formatErrorMessage } from "openclaw/plugin-sdk/error-runtime";
 import { normalizeHostname } from "openclaw/plugin-sdk/host-runtime";
 import { fetchWithRuntimeDispatcher } from "openclaw/plugin-sdk/infra-runtime";
 import type { FetchLike } from "openclaw/plugin-sdk/media-runtime";
@@ -450,7 +451,7 @@ export async function resolveSlackThreadStarter(params: {
     return starter;
   } catch (err) {
     logVerbose(
-      `slack thread starter fetch failed channel=${params.channelId} ts=${params.threadTs}: ${err instanceof Error ? err.message : String(err)}`,
+      `slack thread starter fetch failed channel=${params.channelId} ts=${params.threadTs}: ${formatErrorMessage(err)}`,
     );
     return null;
   }
@@ -545,7 +546,7 @@ export async function resolveSlackThreadHistory(params: {
     }));
   } catch (err) {
     logVerbose(
-      `slack thread history fetch failed channel=${params.channelId} ts=${params.threadTs}: ${err instanceof Error ? err.message : String(err)}`,
+      `slack thread history fetch failed channel=${params.channelId} ts=${params.threadTs}: ${formatErrorMessage(err)}`,
     );
     return [];
   }
diff --git a/scripts/check-no-raw-channel-fetch.mjs b/scripts/check-no-raw-channel-fetch.mjs
index 01d486d539a..3ad0fbb699d 100644
--- a/scripts/check-no-raw-channel-fetch.mjs
+++ b/scripts/check-no-raw-channel-fetch.mjs
@@ -60,9 +60,9 @@ const allowedRawFetchCallsites = new Set([
   bundledPluginCallsite("qqbot", "src/tools/channel.ts", 180),
   bundledPluginCallsite("qqbot", "src/utils/audio-convert.ts", 377),
   bundledPluginCallsite("signal", "src/install-signal-cli.ts", 224),
-  bundledPluginCallsite("slack", "src/monitor/media.ts", 97),
-  bundledPluginCallsite("slack", "src/monitor/media.ts", 116),
-  bundledPluginCallsite("slack", "src/monitor/media.ts", 121),
+  bundledPluginCallsite("slack", "src/monitor/media.ts", 98),
+  bundledPluginCallsite("slack", "src/monitor/media.ts", 117),
+  bundledPluginCallsite("slack", "src/monitor/media.ts", 122),
   bundledPluginCallsite("tlon", "src/tlon-api.ts", 185),
   bundledPluginCallsite("tlon", "src/tlon-api.ts", 235),
   bundledPluginCallsite("tlon", "src/tlon-api.ts", 289),