Embedded Fault Debug

Overview

Use this skill to preserve crash evidence and find the first failing instruction. The agent should read architecture-specific fault state before reset, map addresses to symbols, and separate root cause from secondary symptoms.

When To Use

Use this skill when:

• Firmware hits HardFault, BusFault, UsageFault, trap, illegal instruction, default handler, watchdog reset, assert, or panic.
• The board resets unexpectedly or hangs after a repeatable action.
• The user has a register dump, fault log, crash PC, stack dump, watchdog event, or GDB backtrace.

Do not use this skill when the target cannot yet connect or flash; use mcu-flashing-debug first.

First Questions

Ask for: