diff --git a/e2e/lib/event-parser.ts b/e2e/lib/event-parser.ts
index 9abaaf5c..1ebf5f7a 100644
--- a/e2e/lib/event-parser.ts
+++ b/e2e/lib/event-parser.ts
@@ -55,7 +55,19 @@ function tryParseEvent(text: string, events: ParsedEvent[]): void {
     if (data.type) {
       events.push({ ...data, raw: text })
     }
-  } catch {}
+  } catch (e) {
+    if (
+      text.includes('"startRun"') ||
+      text.includes('"completeRun"') ||
+      text.includes('"stopRun')
+    ) {
+      process.stderr.write(
+        `[PARSE_FAIL] Failed to parse event (len=${text.length}): ${(e as Error).message}\n`,
+      )
+      process.stderr.write(`[PARSE_FAIL] first 200 chars: ${text.slice(0, 200)}\n`)
+      process.stderr.write(`[PARSE_FAIL] last 200 chars: ${text.slice(-200)}\n`)
+    }
+  }
 }
 
 export function filterEventsByType<T extends RunEvent["type"]>(
diff --git a/e2e/perstack-cli/continue.test.ts b/e2e/perstack-cli/continue.test.ts
index 337fc2ad..e34c936d 100644
--- a/e2e/perstack-cli/continue.test.ts
+++ b/e2e/perstack-cli/continue.test.ts
@@ -41,13 +41,12 @@ describe.concurrent("Continue Job", () => {
       { timeout: LLM_TIMEOUT },
     )
     const continueResult = withEventParsing(continueCmdResult)
-    if (!continueResult.events.find((e) => e.type === "completeRun")) {
-      console.log(`[DEBUG continue] exitCode: ${continueCmdResult.exitCode}`)
-      console.log(
-        `[DEBUG continue] events: ${JSON.stringify(continueResult.events.map((e) => e.type))}`,
-      )
-      console.log(`[DEBUG continue] stdout: ${continueCmdResult.stdout.slice(0, 2000)}`)
-      console.log(`[DEBUG continue] stderr: ${continueCmdResult.stderr.slice(0, 2000)}`)
+    process.stderr.write(
+      `\n[DEBUG continue] exitCode=${continueCmdResult.exitCode} events=${JSON.stringify(continueResult.events.map((e) => e.type))}\n`,
+    )
+    process.stderr.write(`[DEBUG continue] stdout:\n${continueCmdResult.stdout.slice(0, 3000)}\n`)
+    if (continueCmdResult.stderr) {
+      process.stderr.write(`[DEBUG continue] stderr:\n${continueCmdResult.stderr.slice(0, 1000)}\n`)
     }
     expect(assertEventSequenceContains(continueResult.events, ["resumeFromStop"]).passed).toBe(true)
     expect(
diff --git a/e2e/perstack-cli/providers.test.ts b/e2e/perstack-cli/providers.test.ts
index 7c90bfb8..2e392f83 100644
--- a/e2e/perstack-cli/providers.test.ts
+++ b/e2e/perstack-cli/providers.test.ts
@@ -31,13 +31,12 @@ describe.concurrent("LLM Providers", () => {
         provider,
       })
       const result = withEventParsing(cmdResult)
-      if (result.exitCode !== 0 || !result.events.find((e) => e.type === "completeRun")) {
-        console.log(`[DEBUG ${provider}] exitCode: ${result.exitCode}`)
-        console.log(
-          `[DEBUG ${provider}] events: ${JSON.stringify(result.events.map((e) => e.type))}`,
-        )
-        console.log(`[DEBUG ${provider}] stdout: ${result.stdout.slice(0, 2000)}`)
-        console.log(`[DEBUG ${provider}] stderr: ${result.stderr.slice(0, 2000)}`)
+      process.stderr.write(
+        `\n[DEBUG ${provider}] exitCode=${result.exitCode} events=${JSON.stringify(result.events.map((e) => e.type))}\n`,
+      )
+      process.stderr.write(`[DEBUG ${provider}] stdout:\n${result.stdout.slice(0, 3000)}\n`)
+      if (result.stderr) {
+        process.stderr.write(`[DEBUG ${provider}] stderr:\n${result.stderr.slice(0, 1000)}\n`)
       }
       expect(result.exitCode).toBe(0)
       expect(assertEventSequenceContains(result.events, ["startRun", "completeRun"]).passed).toBe(