Merge pull request #1242 from yamadashy/chore/improve-perf-tuning-prompt

chore(agents): Broaden perf-tuning prompt to encourage high-impact changes

Author: yamadashy

.agents/commands/code/perf-tuning.md

@@ -1,8 +1,7 @@
 # Goal
-Attempt improvements to the source code in the `src` folder without causing regressions in existing functionality.
+Improve performance or memory usage of `src` and related code (tests, configs, dependencies) without causing regressions.
 
-* Performance tuning
-* Memory usage reduction
+Think broadly — algorithm changes, architectural restructuring, parallelization, caching strategies, library replacements, dependency upgrades, and I/O reduction are all fair game. Small logic tweaks that only shave a few milliseconds on a 1000-file run are not worth pursuing. Aim for changes with meaningful, measurable impact.
 
 # Steps