debug-trace-patterns SKILL.md skillA
debug-trace-patterns from hermeticormus/libreembed-claude-code is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hermeticormus/libreembed-claude-code/debug-trace-patterns@git:20260930.dffc082Pins git:20260930.dffc082 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hermeticormus/libreembed-claude-code
- Path
plugins/debug-trace/skills/debug-trace-patterns/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260930.ba05790, committed Sep 30, 2026
- First version recorded
- Feb 25, 2026
- Size
- 5,625 bytes
- Repository stars
- 51
- License
- MIT
Practical debug patterns for ARM Cortex-M firmware.
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
# debug-trace-patterns ## Knowledge Base Practical debug patterns for ARM Cortex-M firmware. Tools: OpenOCD, GDB, J-Link, logic analyzer. --- ## Pattern 1: Decode CFSR After HardFault Given a CFSR value (e.g., from `monitor mdw 0xE000ED28`), decode: ``` CFSR = 0x00020000 → UFSR.INVSTATE (bit 17) Cause: Attempted to execute code with Thumb bit cleared in xPSR. Common cause: function pointer stored with bit 0 cleared (missing |1 for Thumb). CFSR = 0x00000400 → BFSR.IMPRECISERR (bit 10) Cause: Imprecise bus error. BFAR is not valid. Common cause: DMA write to invalid address, async fault from write buffer. Fix: set SCB->CCR |= SCB_CCR_BFHFNMIGN_Msk temporarily to locate source. CFSR = 0x00008200 → BFSR.PRECISERR + BFSR.BFARVALID Cause: Precise data bus error. BFAR = 0xE000ED38 contains fault address. Common cause: null pointer dereference, access to unmapped memory region. CFSR = 0x02000000 → UFSR.DIVBYZERO (bit 25) Cause: Integer divide by zero. Fix: enable div-by-zero trap: SCB->CCR |= SCB_CCR_DIV_0_TRP_Msk. ``` --- ## Pattern 2: addr2line — Fault PC to Source Line ```bash # Convert stacked PC to source file + line number …
Read the whole file at its exact version.
How to install
mdr add hermeticormus/libreembed-claude-code/debug-trace-patterns@sha256:330ea9c2f0d4e2aeThe line at the top of this page pins the label git:20260930.dffc082, 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_6ppnqboorzmtxevc)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Feb 25, 2026 and Sep 30, 2026, about one every 73 days. Its first recorded version is graded C and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260930.ba05790 latest | 2026-09-30 | ba05790 | 5,625 B | A | view · diff |
| git:20260930.dffc082 | 2026-09-30 | dffc082 | 5,429 B | A | view · diff |
| git:20260226.186740f | 2026-02-26 | 186740f | 5,324 B | C | view · diff |
| git:20260225.a4aeb64 | 2026-02-25 | a4aeb64 | 2,965 B | C | view |
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 (5625 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
hermeticormus/libreembed-claude-code · 51 stars · license MIT · pushed 2026-10-09 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6ppnqboorzmtxevc GET https://markdownregistry.com/api/v1/resolve?ref=hermeticormus/libreembed-claude-code/debug-trace-patterns GET https://markdownregistry.com/api/v1/blob/330ea9c2f0d4e2ae584902f4604f4c40ffa181d03185323bc250a94d209ebc52
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.