* [#17056](https://github.com/apache/nuttx/pull/17056) sched: add stack overflow check on switch context
* [#17121](https://github.com/apache/nuttx/pull/17121) sched: Improve nxsched stack overflow checking implementation
* [#17075](https://github.com/apache/nuttx/pull/17075) sched: merge nxsched_switch_context and add nxsched_switch_critmon
* [#16933](https://github.com/apache/nuttx/pull/16933) sched: remove csection in event
* [#17266](https://github.com/apache/nuttx/pull/17266) sched: replace spinlock/sched_lock with spin_lock_irqsave_nopreempt
* [#17060](https://github.com/apache/nuttx/pull/17060) sched: use nxsched_switch_context to unify the calls to nxsched_suspend_scheduler and nxsched_resume_scheduler
* [#17326](https://github.com/apache/nuttx/pull/17326) sched/clock: Only allow clock_systime_ticks() to access g_system_ticks
* [#17104](https://github.com/apache/nuttx/pull/17104) sched/clock: remove return value of clock_systime_timespec()
* [#17176](https://github.com/apache/nuttx/pull/17176) sched/clock: remove unused function clock_dow() (dow:day of week)
* [#16920](https://github.com/apache/nuttx/pull/16920) sched/event: add nxevent_clear api
* [#16993](https://github.com/apache/nuttx/pull/16993) sched/event: add nxevent_getmask api
* [#16990](https://github.com/apache/nuttx/pull/16990) sched/event: fix event bug after csection was removed by PR 16933
* [#17272](https://github.com/apache/nuttx/pull/17272) sched/event: Fix uninitialized need_switch flag issue in event_post()
* [#16942](https://github.com/apache/nuttx/pull/16942) sched/event: move the temporary even_wait variable out of nxevent_tickwait
* [#16919](https://github.com/apache/nuttx/pull/16919) sched/init/nx_bringup.c: Add support for CONFIG_INIT_NONE in a flat build
* [#17110](https://github.com/apache/nuttx/pull/17110) sched/irq: add a check for the interrupt stack in irq_dispatch
* [#17190](https://github.com/apache/nuttx/pull/17190) sched/irq: fixed some issues with irq stack overflow detection
* [#16944](https://github.com/apache/nuttx/pull/16944) sched/semaphore: add support to customize semaphore max allowed value
* [#17222](https://github.com/apache/nuttx/pull/17222) sched/sched: add nxsched_wakeup(), introduce TSTATE_SLEEPING and improve nxsched_ticksleep()
* [#17324](https://github.com/apache/nuttx/pull/17324) sched/sched: Fix nxsched_suspend() logic
* [#17199](https://github.com/apache/nuttx/pull/17199) sched/sched: Replace nxsched_alarm_tick_expiration() with nxsched_tick_expiration()
* [#17359](https://github.com/apache/nuttx/pull/17359) sched/signal: Fix nxsig_ismember() return value behavior
* [#17367](https://github.com/apache/nuttx/pull/17367) sched/signal: Fix nxsig clockwait() implementation issue
* [#17366](https://github.com/apache/nuttx/pull/17366) sched/signal: Initialize signal action pool during init phase
* [#17252](https://github.com/apache/nuttx/pull/17252) sched/signal: Improve nxsig_wait_irq() for performance enhancement and code duplication reduction
* [#17196](https://github.com/apache/nuttx/pull/17196) sched/signal: Remove shadow definitions to reduce unnecessary API
* [#17212](https://github.com/apache/nuttx/pull/17212) sched/signal: use list_waitingforsignal() to access g_waitingforsignal
* [#16939](https://github.com/apache/nuttx/pull/16939) sched/signal/sig_dispatch.c: Correct signal dispatch to specific thread
* [#17263](https://github.com/apache/nuttx/pull/17263) sched/signal/sig_dispatch.c: Remove DEBUGASSERT(!sched_idletask())
* [#17130](https://github.com/apache/nuttx/pull/17130) sched/sig_pending: sigpending() should return caller pending signals only
* [#17368](https://github.com/apache/nuttx/pull/17368) sched/sleep: Add nxsched_nanosleep() API
* [#17200](https://github.com/apache/nuttx/pull/17200) sched/sleep: add support for scheduling sleep
* [#17204](https://github.com/apache/nuttx/pull/17204) sched/sleep: replace all Signal-based sleep implement to Scheduled sleep
* [#17106](https://github.com/apache/nuttx/pull/17106) sched/task: move lock to mhead scope
* [#17293](https://github.com/apache/nuttx/pull/17293) sched/wdog: Fix wd_start() boundary check for WDOG_MAX_DELAY
* [#17279](https://github.com/apache/nuttx/pull/17279) sched/wdog: Improve wdog precision
* [#17295](https://github.com/apache/nuttx/pull/17295) sched/wdog: Introduce wd_restart()/wd_restart_next() for convenient watchdog restart
* [#17159](https://github.com/apache/nuttx/pull/17159) sched/wdog: remove unnecessary list_node redefinition
* [#17286](https://github.com/apache/nuttx/pull/17286) sched/wdog: Use list_in_list() to detect active watchdogs
* [#17300](https://github.com/apache/nuttx/pull/17300) sched_lock: remove the check for whether tcb is NULL | 