diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2a484c6534..28b6c06f191 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -65,6 +65,7 @@ Docs: https://docs.openclaw.ai
 - Security/audit account handling: avoid prototype-chain account IDs in audit validation by using own-property checks for `accounts`. (#34982) Thanks @HOYALIM.
 - Cron/restart catch-up semantics: replay interrupted recurring jobs and missed immediate cron slots on startup without replaying interrupted one-shot jobs, with guarded missed-slot probing to avoid malformed-schedule startup aborts and duplicate-trigger drift after restart. (from #34466, #34896, #34625, #33206) Thanks @dunamismax, @dsantoreis, @Octane0411, and @Sid-Qin.
 - Agents/session usage tracking: preserve accumulated usage metadata on embedded Pi runner error exits so failed turns still update session `totalTokens` from real usage instead of stale prior values. (#34275) thanks @RealKai42.
+- Slack/reaction thread context routing: carry Slack native DM channel IDs through inbound context and threading tool resolution so reaction targets resolve consistently for DM `To=user:*` sessions (including `toolContext.currentChannelId` fallback behavior). (from #34831; overlaps #34440, #34502, #34483, #32754) Thanks @dunamismax.
 - Nodes/system.run approval hardening: use explicit argv-mutation signaling when regenerating prepared `rawCommand`, and cover the `system.run.prepare -> system.run` handoff so direct PATH-based `nodes.run` commands no longer fail with `rawCommand does not match command`. (#33137) thanks @Sid-Qin.
 - Models/custom provider headers: propagate `models.providers.<name>.headers` across inline, fallback, and registry-found model resolution so header-authenticated proxies consistently receive configured request headers. (#27490) thanks @Sid-Qin.
 - Ollama/custom provider headers: forward resolved model headers into native Ollama stream requests so header-authenticated Ollama proxies receive configured request headers. (#24337) thanks @echoVic.
diff --git a/src/auto-reply/reply/agent-runner-utils.ts b/src/auto-reply/reply/agent-runner-utils.ts
index ace68914e18..daa9b548fb2 100644
--- a/src/auto-reply/reply/agent-runner-utils.ts
+++ b/src/auto-reply/reply/agent-runner-utils.ts
@@ -58,6 +58,7 @@ export function buildThreadingToolContext(params: {
         ReplyToId: sessionCtx.ReplyToId,
         ThreadLabel: sessionCtx.ThreadLabel,
         MessageThreadId: sessionCtx.MessageThreadId,
+        NativeChannelId: sessionCtx.NativeChannelId,
       },
       hasRepliedRef,
     }) ?? {};
diff --git a/src/auto-reply/templating.ts b/src/auto-reply/templating.ts
index c0ab459bfe9..9c9a7f4d430 100644
--- a/src/auto-reply/templating.ts
+++ b/src/auto-reply/templating.ts
@@ -142,6 +142,8 @@ export type MsgContext = {
   GatewayClientScopes?: string[];
   /** Thread identifier (Telegram topic id or Matrix thread event id). */
   MessageThreadId?: string | number;
+  /** Platform-native channel/conversation id (e.g. Slack DM channel "D…" id). */
+  NativeChannelId?: string;
   /** Telegram forum supergroup marker. */
   IsForum?: boolean;
   /** Warning: DM has topics enabled but this message is not in a topic. */
diff --git a/src/channels/plugins/types.core.ts b/src/channels/plugins/types.core.ts
index 379c6b8c89e..af8a2eca955 100644
--- a/src/channels/plugins/types.core.ts
+++ b/src/channels/plugins/types.core.ts
@@ -257,6 +257,8 @@ export type ChannelThreadingContext = {
   ReplyToIdFull?: string;
   ThreadLabel?: string;
   MessageThreadId?: string | number;
+  /** Platform-native channel/conversation id (e.g. Slack DM channel "D…" id). */
+  NativeChannelId?: string;
 };
 
 export type ChannelThreadingToolContext = {
diff --git a/src/slack/monitor/message-handler/prepare.ts b/src/slack/monitor/message-handler/prepare.ts
index 4d66c73e40d..564dce16fea 100644
--- a/src/slack/monitor/message-handler/prepare.ts
+++ b/src/slack/monitor/message-handler/prepare.ts
@@ -727,6 +727,7 @@ export async function prepareSlackMessage(params: {
     CommandAuthorized: commandAuthorized,
     OriginatingChannel: "slack" as const,
     OriginatingTo: slackTo,
+    NativeChannelId: message.channel,
   }) satisfies FinalizedMsgContext;
   const pinnedMainDmOwner = isDirectMessage
     ? resolvePinnedMainDmOwnerFromAllowlist({
diff --git a/src/slack/threading-tool-context.test.ts b/src/slack/threading-tool-context.test.ts
index c4be6ef2d77..69f4cf0e0dd 100644
--- a/src/slack/threading-tool-context.test.ts
+++ b/src/slack/threading-tool-context.test.ts
@@ -144,4 +144,35 @@ describe("buildSlackThreadingToolContext", () => {
     });
     expect(result.replyToMode).toBe("off");
   });
+
+  it("extracts currentChannelId from channel: prefixed To", () => {
+    const result = buildSlackThreadingToolContext({
+      cfg: emptyCfg,
+      accountId: null,
+      context: { ChatType: "channel", To: "channel:C1234ABC" },
+    });
+    expect(result.currentChannelId).toBe("C1234ABC");
+  });
+
+  it("uses NativeChannelId for DM when To is user-prefixed", () => {
+    const result = buildSlackThreadingToolContext({
+      cfg: emptyCfg,
+      accountId: null,
+      context: {
+        ChatType: "direct",
+        To: "user:U8SUVSVGS",
+        NativeChannelId: "D8SRXRDNF",
+      },
+    });
+    expect(result.currentChannelId).toBe("D8SRXRDNF");
+  });
+
+  it("returns undefined currentChannelId when neither channel: To nor NativeChannelId is set", () => {
+    const result = buildSlackThreadingToolContext({
+      cfg: emptyCfg,
+      accountId: null,
+      context: { ChatType: "direct", To: "user:U8SUVSVGS" },
+    });
+    expect(result.currentChannelId).toBeUndefined();
+  });
 });
diff --git a/src/slack/threading-tool-context.ts b/src/slack/threading-tool-context.ts
index 6841972d3e0..11860f78636 100644
--- a/src/slack/threading-tool-context.ts
+++ b/src/slack/threading-tool-context.ts
@@ -19,10 +19,14 @@ export function buildSlackThreadingToolContext(params: {
   const hasExplicitThreadTarget = params.context.MessageThreadId != null;
   const effectiveReplyToMode = hasExplicitThreadTarget ? "all" : configuredReplyToMode;
   const threadId = params.context.MessageThreadId ?? params.context.ReplyToId;
+  // For channel messages, To is "channel:C…" — extract the bare ID.
+  // For DMs, To is "user:U…" which can't be used for reactions; fall back
+  // to NativeChannelId (the raw Slack channel id, e.g. "D…").
+  const currentChannelId = params.context.To?.startsWith("channel:")
+    ? params.context.To.slice("channel:".length)
+    : params.context.NativeChannelId?.trim() || undefined;
   return {
-    currentChannelId: params.context.To?.startsWith("channel:")
-      ? params.context.To.slice("channel:".length)
-      : undefined,
+    currentChannelId,
     currentThreadTs: threadId != null ? String(threadId) : undefined,
     replyToMode: effectiveReplyToMode,
     hasRepliedRef: params.hasRepliedRef,