The PR adds a startup guard for Ink-based runs that periodically clears Node performance entries so they no longer accumulate indefinitely in the global perf_hooks buffer during long-lived workflows.
Scattered source updates, isolated context, and manual follow-up across multiple feeds.
Implemented `source/utils/perf-buffer.ts` with `installPerfBufferGuard()`, which starts a non-blocking 30-second cleanup timer that drains marks/measures/resource-timing entries, and integrated it into CLI startup so every interactive/run Nanocoder session begins with this guard active.
Long-running Nanocoder users running many subagent turns are less likely to see hard crashes from `JavaScript heap out of memory`, so operators can keep automation sessions alive longer without manual restarts; monitor memory growth and crash incidence during very long runs to confirm the cleanup frequency remains sufficient under peak render/request load. The root fix removes a silent leak path from dev-mode React render timing calls and undici request timings that were never observed in Nanocoder, and periodically drains the global performance entry buffer that had previously been growing without bound.
Long-running Nanocoder users running many subagent turns are less likely to see hard crashes from `JavaScript heap out of memory`, so operators can keep automation sessions alive longer without manual restarts; monitor memory growth and crash incidence during very long runs to confirm the cleanup frequency remains sufficient under peak render/request load. The root fix removes a silent leak path from dev-mode React render timing calls and undici request timings that were never observed in Nanocoder, and periodically drains the global performance entry buffer that had previously been growing without bound.