npe-hunting-workflow SKILL.md skillA
npe-hunting-workflow from rysweet/amplihack-rs is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rysweet/amplihack-rs/npe-hunting-workflow@v1.0Pins v1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rysweet/amplihack-rs
- Path
amplifier-bundle/skills/npe-hunting-workflow/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0, committed Aug 27, 2026
- Size
- 6,984 bytes
- Repository stars
- 11
- License
- none declared
Investigates and remediates NullPointerException (NPE) and null-dereference failures from a real stack trace. Use when tracing an NPE, finding structurally similar null bugs, filtering false positives, deciding whether TLA+ applies, or coordinating validated fixes.
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
# NPE Hunting Workflow ## Purpose Turns one observed null failure into an evidence-driven search for related bugs. It separates candidate generation, skeptical falsification, validation, formal analysis, and remediation so plausible static matches are never treated as confirmed defects. ## Required Outcomes - Anchor the investigation to an observed stack trace and repository revision. - Explain the complete lifecycle that can produce the null value. - Record every candidate, including rejected and inconclusive candidates. - Invoke `crusty-old-engineer` to falsify every candidate before validation. - Assess formal methods for every surviving lifecycle or interleaving defect. - Add a characterization test before changing production behavior. - Fix only validated bugs through `default-workflow`. - Run parallel fixes only when file and interface ownership is disjoint. ## Workflow ### 1. Initialize evidence tracking Create a process journal and candidate ledger before searching. Use the formats in [reference.md](reference.md). Record commands, hypotheses, failed approaches, and decisions, not just successful findings. Candidate states are: …
Read the whole file at its exact version.
How to install
mdr add rysweet/amplihack-rs/npe-hunting-workflow@sha256:a4c6887bfd2e127bThe line at the top of this page pins the label v1.0, 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_tpfuuzt6q4msnhkd)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 27, 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 (6984 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
rysweet/amplihack-rs · 11 stars · license none declared · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tpfuuzt6q4msnhkd GET https://markdownregistry.com/api/v1/resolve?ref=rysweet/amplihack-rs/npe-hunting-workflow GET https://markdownregistry.com/api/v1/blob/a4c6887bfd2e127bad675c78ff538f516f1c8a1244e74a7c51e97ad9fff6da55
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.