Individual skill
baremetal-startup
Use when writing reset-to-main startup code, vector tables, VTOR, .data/.bss init, stack setup, startup.s, or crt0 for Cortex-M/RISC-V. Not for the bootloader jump: use bootloaders-embedded.
.devin/skills/baremetal-startup/SKILL.md
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- Last checked
- Nov 4, 2026
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- 55
- Repository last updated
- Sep 28, 2026
- License
- Apache-2.0
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SKILL.mdcore · 7,411 bytesagents/openai.yamlasset · 206 bytes
Read excerpt
# Bare-metal startup
## Contract
| Field | Bound contract |
|---|---|
| Trigger | Firmware never reaches `main()`, a new MCU is being brought up without a vendor HAL, or a custom `startup.s`, `Reset_Handler`, or crt0 is being written or debugged on Cortex-M or RISC-V. |
| Authority | Read-only: emits startup code, linker symbol requirements, and diagnostics to chat; the user places them in the project. Rollback is not needed because no file is written. No remote mutation. |
| Side effect | Chat output only. |
| Done | The startup path from the reset vector to `main()` is stated step by step, the vector table layout and the `.data` and `.bss` loops are given for the target core, and every linker symbol the code uses is listed with the linker script line that defines it. |
## Inputs
- Target core (Cortex-M0+, M3, M4F, M7, or RISC-V RV32 or RV64) and the vendor part.