fix(slack): keep newest rich progress lines

CHANGELOG.md

@@ -13,6 +13,7 @@ Docs: https://docs.openclaw.ai
 
 - Channels/streaming: add unified `streaming.mode: "progress"` drafts with auto single-word status labels and shared progress configuration across Discord, Telegram, Matrix, Slack, and Microsoft Teams.
 - Slack/streaming: add `streaming.progress.render: "rich"` for Block Kit progress drafts backed by structured progress line data.
+- Slack/streaming: keep the newest rich progress lines when Block Kit limits trim long progress drafts. Thanks @vincentkoc.
 - Channels/streaming: cap progress-draft tool lines by default so edited progress boxes avoid jumpy reflow from long wrapped lines.
 - Agents/verbose: use compact explain-mode tool summaries for `/verbose` and progress drafts by default, with `agents.defaults.toolProgressDetail: "raw"` and per-agent overrides for debugging raw command/detail output.
 - Agents/commands: add `/steer <message>` for queue-independent steering of the active current-session run without starting a new turn when the session is idle. (#76934)

extensions/slack/src/progress-blocks.test.ts

@@ -64,7 +64,7 @@ describe("buildSlackProgressDraftBlocks", () => {
     });
   });
 
-  it("caps rich progress blocks to Slack's maximum while leaving caller text fallback independent", () => {
+  it("keeps newest rich progress lines when capping Slack blocks", () => {
     const blocksWithLabel = buildSlackProgressDraftBlocks({
       label: "Shelling...",
       lines: Array.from({ length: 60 }, (_value, index) => progressLine(index)),
@@ -74,18 +74,26 @@ describe("buildSlackProgressDraftBlocks", () => {
       type: "section",
       text: { text: "*Shelling...*" },
     });
+    expect(blocksWithLabel?.[1]).toMatchObject({
+      type: "section",
+      fields: [{ text: "🛠️ *Exec 11*" }, { text: "run 11" }],
+    });
     expect(blocksWithLabel?.at(-1)).toMatchObject({
       type: "section",
-      fields: [{ text: "🛠️ *Exec 48*" }, { text: "run 48" }],
+      fields: [{ text: "🛠️ *Exec 59*" }, { text: "run 59" }],
     });
 
     const blocksWithoutLabel = buildSlackProgressDraftBlocks({
       lines: Array.from({ length: 60 }, (_value, index) => progressLine(index)),
     });
     expect(blocksWithoutLabel).toHaveLength(50);
+    expect(blocksWithoutLabel?.[0]).toMatchObject({
+      type: "section",
+      fields: [{ text: "🛠️ *Exec 10*" }, { text: "run 10" }],
+    });
     expect(blocksWithoutLabel?.at(-1)).toMatchObject({
       type: "section",
-      fields: [{ text: "🛠️ *Exec 49*" }, { text: "run 49" }],
+      fields: [{ text: "🛠️ *Exec 59*" }, { text: "run 59" }],
     });
   });
 });

extensions/slack/src/progress-blocks.ts

@@ -55,7 +55,7 @@ export function buildSlackProgressDraftBlocks(params: {
     });
   }
   const availableLineBlocks = Math.max(0, SLACK_MAX_BLOCKS - blocks.length);
-  for (const line of params.lines.slice(0, availableLineBlocks)) {
+  for (const line of params.lines.slice(-availableLineBlocks)) {
     blocks.push({
       type: "section",
       fields: [field(lineTitle(line)), field(lineDetail(line))],