hardfault-triage SKILL.md skillA
hardfault-triage from amethystluna/embedded-workbench is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add amethystluna/embedded-workbench/hardfault-triage@git:20260625.b058c1cPins git:20260625.b058c1c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- amethystluna/embedded-workbench
- Path
skills/hardfault-triage/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260625.b058c1c, committed Jun 25, 2026
- Size
- 11,592 bytes
- Repository stars
- 32
- License
- MIT
Use when triaging processor exception crashes — HardFault, MemManage, BusFault, UsageFault, data/prefetch abort, illegal instruction, or watchdog timeout. Covers fault-register interpretation, stack-frame extraction, PC-to-source resolution, and root-cause classification.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# HardFault & Exception Triage
When a processor exception fires, the register file and stack frame are a black-box recording of the crash. This skill covers how to read that recording.
The methodology is architecture-agnostic. Cortex-M (ARMv7-M/v8-M) fault registers and handlers are the primary reference; the same principles apply to Cortex-A aborts, RISC-V exceptions, Xtensa exception vectors, and other MCU fault paths.
**REQUIRED BACKGROUND:** Load `Skill("debug-methodology")` for structured root-cause analysis. If the crash involves RTOS tasks or ISR context, also load `Skill("embedded-firmware-dev")`.
## Triage Methodology
Every processor exception triage follows the same four-step flow:
### Step 1 — Capture
Read the architecture's fault-status and fault-address registers **before any other code runs**. The first instructions after exception entry are the only guaranteed-clean snapshot.
- Cortex-M: CFSR, HFSR, MMFAR, BFAR at SCB base `0xE000ED00`
- Cortex-A: DFSR, DFAR, IFSR, IFAR (data/prefetch abort)
- RISC-V: mcause, mtval, mepc
- Xtensa (ESP32): EXCCAUSE, EXCVADDR, EPC1
### Step 2 — Classify
…Read the whole file at its exact version.
How to install
mdr add amethystluna/embedded-workbench/hardfault-triage@sha256:6c2033ac614b6d9aThe line at the top of this page pins the label git:20260625.b058c1c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_iqnkw6ny3xugt7fw)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 25, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11592 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
amethystluna/embedded-workbench · 32 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_iqnkw6ny3xugt7fw GET https://markdownregistry.com/api/v1/resolve?ref=amethystluna/embedded-workbench/hardfault-triage GET https://markdownregistry.com/api/v1/blob/6c2033ac614b6d9a439a75c0b7a4d712a378ca7b0b24fab4db2879c554ae45f2
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.