failure-mode-enumeration SKILL.md skillA
failure-mode-enumeration from rlaope/ultraprompt is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rlaope/ultraprompt/failure-mode-enumeration@git:20260915.a5ced99Pins git:20260915.a5ced99 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rlaope/ultraprompt
- Path
skills/failure-mode-enumeration/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260915.a5ced99, committed Sep 15, 2026
- First version recorded
- Jul 5, 2026
- Size
- 10,588 bytes
- Repository stars
- 35
- License
- MIT
Systematically enumerate how code can break — boundaries, concurrency, partial failure, malicious input, time, resource exhaustion — before writing defenses, then convert the list into tests and guards while pruning paranoia that does not pay rent.
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
# Failure-Mode Enumeration > Status: v0.1 baseline draft — derived from the case catalog and axis definitions; awaiting trace evidence from Fable 5.1 case runs. ## When to apply - Writing any code that crosses a trust or process boundary: network calls, disk I/O, user input, IPC, subprocess spawning. - Designing a system where partial failure is possible: queues, retries, distributed transactions, multi-step writes. - Implementing a parser, protocol handler, or format decoder that will receive arbitrary bytes. - Adding concurrency: shared state, locks, async cancellation, anything with more than one thread of execution. - Reviewing code before shipping when the cost of a production failure is high (payments, data loss, security). - The user asks "what could go wrong here?" or wants tests hardened against edge cases. ## Core loop 1. **Fix the unit of analysis first.** Name the exact function, endpoint, or state machine you are enumerating against. Enumerating "the system" produces vague worry; enumerating `consume_message()` produces a checklist. Write the unit's contract in one line: inputs, outputs, and the invariants that must hold after it runs. …
Read the whole file at its exact version.
How to install
mdr add rlaope/ultraprompt/failure-mode-enumeration@sha256:fc293c1e8be515bbThe line at the top of this page pins the label git:20260915.a5ced99, 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_qefxkbu3225fdaaw)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 5, 2026 and Sep 15, 2026, about one every 72 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260915.a5ced99 latest | 2026-09-15 | a5ced99 | 10,588 B | A | view · diff |
| git:20260705.c12b4fc | 2026-07-05 | c12b4fc | 10,586 B | A | 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 (10588 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
rlaope/ultraprompt · 35 stars · license MIT · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qefxkbu3225fdaaw GET https://markdownregistry.com/api/v1/resolve?ref=rlaope/ultraprompt/failure-mode-enumeration GET https://markdownregistry.com/api/v1/blob/fc293c1e8be515bbf36db04510ab293a4f9d5c9c1fc6985c11d5aa9928041d72
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.