CI: cap parity gate concurrency

.github/workflows/parity-gate.yml

@@ -33,6 +33,13 @@ jobs:
       # meaningful verdict without touching a real API. If any of these
       # leak into the job env, fail hard instead of silently running
       # against a live provider and burning real budget.
+      #
+      # The parity pack has 11 isolated scenario workers. Letting qa suite
+      # fan out to its default "all scenarios at once" mode on smaller CI
+      # VMs makes the short strict-agentic scenarios flaky, especially the
+      # approval-turn followthrough gate that expects a fast post-approval
+      # read within a 30s agent.wait timeout.
+      QA_PARITY_CONCURRENCY: "2"
       OPENAI_API_KEY: ""
       ANTHROPIC_API_KEY: ""
       OPENCLAW_LIVE_OPENAI_KEY: ""
@@ -60,6 +67,7 @@ jobs:
           pnpm openclaw qa suite \
             --provider-mode mock-openai \
             --parity-pack agentic \
+            --concurrency "${QA_PARITY_CONCURRENCY}" \
             --model openai/gpt-5.4 \
             --alt-model openai/gpt-5.4-alt \
             --output-dir .artifacts/qa-e2e/gpt54
@@ -69,6 +77,7 @@ jobs:
           pnpm openclaw qa suite \
             --provider-mode mock-openai \
             --parity-pack agentic \
+            --concurrency "${QA_PARITY_CONCURRENCY}" \
             --model anthropic/claude-opus-4-6 \
             --alt-model anthropic/claude-sonnet-4-6 \
             --output-dir .artifacts/qa-e2e/opus46