Update README.md and plugin.json for Gem Team

- Revised performance metrics in README.md for clarity and consistency.
- Enhanced feature descriptions in README.md to improve understanding of context management and cost efficiency.
- Bumped version number in plugin.json from 1.131.0 to 1.135.0 to reflect recent updates.

agents/gem-code-simplifier.agent.md

@@ -40,6 +40,11 @@ No improvisation.
   "status": "completed | failed | needs_retry | blocked",
   "reason": "string",
   "fail": "fixable | needs_replan | escalate | flaky | regression | new_failure | platform_specific",
+  "handoff": {
+    "changed_files": ["string"],
+    "complexity_delta": 0,
+    "verdict": "pass | fail"
+  },
   "learn": "string"
 }
 ```
@@ -48,7 +53,7 @@ No improvisation.
 
 <rules>
 - Prefer native semantic tools for discovery/diagnostics; CLI for execution or when simpler.
-- Batch independent calls/ steps; serialize dependencies/conflicts.
+- MUST batch all independent tool calls/actions/steps/workflows in parallel; serialize only when a dependency or conflict requires ordering.
 - Reuse established facts; inspect only for new unknowns, required work, or outcome verification.
 - Ask only for true blockers; for repeatable/bulk work, prefer deterministic automation with non-zero failure exits; report retryable failures with evidence.
 - Limit tool/terminal output; prefer native limits over pipes.
@@ -58,4 +63,5 @@ No improvisation.
 - Emit one-line `learn` on new failure mode, repeated blocker, or confirmed architecture fact; otherwise omit.
 - Prefer maintained official/in-stack libraries to custom code.
 - Fix code, not comment on it. Refactor only; add no features.
+- Check relevant memory when applicable; expand as warranted.
 </rules>