fix: retry observer wait after signal

skills/continuous-learning-v2/agents/observer-loop.sh

@@ -83,6 +83,28 @@ exit_if_idle_without_sessions() {
   fi
 }
 
+wait_for_claude_analysis() {
+  local child_pid="$1"
+  local wait_status=0
+
+  while true; do
+    wait "$child_pid"
+    wait_status=$?
+
+    if [ "$wait_status" -eq 0 ]; then
+      return 0
+    fi
+
+    # SIGUSR1 can interrupt wait while the Claude child is still running.
+    # Re-wait in that case so a signal is not logged as a false child failure.
+    if kill -0 "$child_pid" 2>/dev/null; then
+      continue
+    fi
+
+    return "$wait_status"
+  done
+}
+
 analyze_observations() {
   if [ ! -f "$OBSERVATIONS_FILE" ]; then
     return
@@ -217,7 +239,7 @@ PROMPT
   ) &
   watchdog_pid=$!
 
-  wait "$claude_pid"
+  wait_for_claude_analysis "$claude_pid"
   exit_code=$?
   kill "$watchdog_pid" 2>/dev/null || true
   rm -f "$analysis_file"

tests/hooks/observer-memory.test.js

@@ -205,6 +205,63 @@ test('prompt references analysis_file not full OBSERVATIONS_FILE', () => {
   assert.ok(promptSection.includes('${analysis_relpath}'), 'Prompt should point Claude at the sampled analysis file (via relative path), not the full observations file');
 });
 
+test('observer-loop wait helper retries SIGUSR1-interrupted waits while claude child is alive', () => {
+  if (process.platform === 'win32') {
+    return;
+  }
+
+  const content = fs.readFileSync(observerLoopPath, 'utf8');
+  const helperMatch = content.match(/wait_for_claude_analysis\(\) \{[\s\S]*?\n\}/);
+  assert.ok(helperMatch, 'observer-loop.sh should define wait_for_claude_analysis helper');
+
+  const script = [
+    'set +e',
+    helperMatch[0],
+    'trap ":" USR1',
+    '( sleep 0.35; exit 0 ) &',
+    'claude_child=$!',
+    '( sleep 0.05; kill -USR1 $$ ) &',
+    'signaler=$!',
+    'wait_for_claude_analysis "$claude_child"',
+    'status=$?',
+    'wait "$signaler" 2>/dev/null || true',
+    'exit "$status"'
+  ].join('\n');
+
+  const result = spawnSync('bash', ['-c', script], {
+    encoding: 'utf8',
+    timeout: 5000
+  });
+
+  assert.strictEqual(result.status, 0, `interrupted wait should return child exit 0, got ${result.status}; stderr: ${result.stderr}`);
+});
+
+test('observer-loop wait helper preserves real nonzero claude exits', () => {
+  if (process.platform === 'win32') {
+    return;
+  }
+
+  const content = fs.readFileSync(observerLoopPath, 'utf8');
+  const helperMatch = content.match(/wait_for_claude_analysis\(\) \{[\s\S]*?\n\}/);
+  assert.ok(helperMatch, 'observer-loop.sh should define wait_for_claude_analysis helper');
+
+  const script = [
+    'set +e',
+    helperMatch[0],
+    '( sleep 0.05; exit 7 ) &',
+    'claude_child=$!',
+    'wait_for_claude_analysis "$claude_child"',
+    'exit "$?"'
+  ].join('\n');
+
+  const result = spawnSync('bash', ['-c', script], {
+    encoding: 'utf8',
+    timeout: 5000
+  });
+
+  assert.strictEqual(result.status, 7, `real child failure should be preserved, got ${result.status}; stderr: ${result.stderr}`);
+});
+
 // ──────────────────────────────────────────────────────
 // Test group 5: Signal counter file simulation
 // ──────────────────────────────────────────────────────