diff --git a/actions/setup/js/log_parser_shared.cjs b/actions/setup/js/log_parser_shared.cjs
index e07d4cc6bc4..ab93a9cc7a6 100644
--- a/actions/setup/js/log_parser_shared.cjs
+++ b/actions/setup/js/log_parser_shared.cjs
@@ -840,6 +840,28 @@ function convertCopilotEventsToLegacyLogEntries(logEntries) {
     return "";
   };
 
+  // Builds the tool_use `input` object for a Copilot SDK tool event.
+  // Copilot SDK bash events carry the executed command as a top-level `data.command`
+  // field rather than nesting it inside `data.input`/`data.parameters`, so fall back
+  // to it (and merge it in when structured input lacks a command) to avoid dropping
+  // the command from the rendered summary.
+  // Pass { includeCommand: false } when normalizing orphaned completion events that
+  // may still carry structured input but cannot reliably recover the original command.
+  const buildToolInput = (data, options = {}) => {
+    const { includeCommand = true } = options;
+    const base = data.input || data.parameters;
+    if (base && typeof base === "object" && !Array.isArray(base)) {
+      if (includeCommand && base.command === undefined && typeof data.command === "string") {
+        return { ...base, command: data.command };
+      }
+      return base;
+    }
+    if (includeCommand && typeof data.command === "string") {
+      return { command: data.command };
+    }
+    return {};
+  };
+
   for (const entry of logEntries) {
     if (!entry || typeof entry !== "object") continue;
     const data = entry.data && typeof entry.data === "object" ? entry.data : {};
@@ -900,7 +922,7 @@ function convertCopilotEventsToLegacyLogEntries(logEntries) {
         normalizedEntries.push({
           type: "assistant",
           message: {
-            content: [{ type: "tool_use", id: resolvedToolId, name: toolName, input: data.input || data.parameters || {} }],
+            content: [{ type: "tool_use", id: resolvedToolId, name: toolName, input: buildToolInput(data) }],
           },
         });
         break;
@@ -926,7 +948,9 @@ function convertCopilotEventsToLegacyLogEntries(logEntries) {
           normalizedEntries.push({
             type: "assistant",
             message: {
-              content: [{ type: "tool_use", id: resolvedToolId, name: toolName, input: data.input || data.parameters || {} }],
+              // Orphaned completion events have no corresponding start event, so keep
+              // structured input but do not synthesize a command from completion data.
+              content: [{ type: "tool_use", id: resolvedToolId, name: toolName, input: buildToolInput(data, { includeCommand: false }) }],
             },
           });
         }
diff --git a/actions/setup/js/parse_copilot_log.test.cjs b/actions/setup/js/parse_copilot_log.test.cjs
index 89f5c991d1b..e03da170ce8 100644
--- a/actions/setup/js/parse_copilot_log.test.cjs
+++ b/actions/setup/js/parse_copilot_log.test.cjs
@@ -138,6 +138,52 @@ describe("parse_copilot_log.cjs", () => {
       expect(result.markdown).toContain("file1.txt");
     });
 
+    it("renders the bash command from data.command in Copilot CLI events.jsonl", () => {
+      // Real Copilot SDK events carry the executed command as a top-level data.command
+      // field on tool.execution_start, not nested inside data.input/data.parameters.
+      const eventsLog = [
+        '{"type":"user.message","timestamp":"2026-06-05T00:44:01.367Z","data":{}}',
+        '{"type":"tool.execution_start","timestamp":"2026-06-05T00:44:04.520Z","data":{"toolName":"bash","mcpServerName":"","command":"cat /tmp/gh-aw/agent/candidates.txt"}}',
+        '{"type":"tool.execution_complete","timestamp":"2026-06-05T00:44:04.700Z","data":{"toolName":"bash","mcpServerName":"","success":true,"result":{"content":"candidate-list-output"}}}',
+        '{"type":"assistant.message","timestamp":"2026-06-05T00:44:59.769Z","data":{"content":"Done"}}',
+      ].join("\n");
+
+      const result = parseCopilotLog(eventsLog);
+
+      expect(result.markdown).toContain("bash");
+      expect(result.markdown).toContain("cat /tmp/gh-aw/agent/candidates.txt");
+      expect(result.markdown).toContain("candidate-list-output");
+    });
+
+    it("merges data.command into existing data.input when command is absent there", () => {
+      const eventsLog = [
+        '{"type":"user.message","timestamp":"2026-06-05T00:44:01.367Z","data":{}}',
+        '{"type":"tool.execution_start","timestamp":"2026-06-05T00:44:04.520Z","data":{"toolName":"bash","mcpServerName":"","input":{"cwd":"/tmp"},"command":"ls"}}',
+        '{"type":"tool.execution_complete","timestamp":"2026-06-05T00:44:04.700Z","data":{"toolName":"bash","mcpServerName":"","success":true,"result":{"content":"file1.txt\\nfile2.txt"}}}',
+        '{"type":"assistant.message","timestamp":"2026-06-05T00:44:59.769Z","data":{"content":"Done"}}',
+      ].join("\n");
+
+      const result = parseCopilotLog(eventsLog);
+
+      expect(result.markdown).toContain("ls");
+      expect(result.markdown).toContain("/tmp");
+      expect(result.markdown).toContain("file1.txt");
+    });
+
+    it("preserves structured input for orphaned completion events without inventing a command", () => {
+      const eventsLog = [
+        '{"type":"user.message","timestamp":"2026-06-05T00:44:01.367Z","data":{}}',
+        '{"type":"tool.execution_complete","timestamp":"2026-06-05T00:44:04.700Z","data":{"toolName":"bash","mcpServerName":"","input":{"cwd":"/tmp"},"success":true,"result":{"content":"file1.txt\\nfile2.txt"}}}',
+        '{"type":"assistant.message","timestamp":"2026-06-05T00:44:59.769Z","data":{"content":"Done"}}',
+      ].join("\n");
+
+      const result = parseCopilotLog(eventsLog);
+
+      expect(result.markdown).toContain("bash");
+      expect(result.markdown).toContain("/tmp");
+      expect(result.markdown).toContain("file1.txt");
+    });
+
     it("renders tool output preview from array-based result.content in Copilot CLI events.jsonl", () => {
       const eventsLog = [
         '{"type":"user.message","timestamp":"2026-06-05T00:44:01.367Z","data":{}}',