quality-engineering-api-fuzz-testing SKILL.md skillA
quality-engineering-api-fuzz-testing from hoangnguyen0403/agent-skills-standard is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hoangnguyen0403/agent-skills-standard/quality-engineering-api-fuzz-testing@git:20261027.7209c6cPins git:20261027.7209c6c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hoangnguyen0403/agent-skills-standard
- Path
.claude/skills/quality-engineering/quality-engineering-api-fuzz-testing/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261027.7209c6c, committed Oct 27, 2026
- Size
- 5,030 bytes
- Repository stars
- 583
- License
- MIT
Author and execute structured API fuzzing, property-based robustness tests, and dynamic authorization checks. Use when fuzzing API payloads, testing schema boundaries, or verifying real-guard access controls.
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
# Quality Engineering: API Fuzz and Security Testing ## **Priority: P0 (CRITICAL)** ## Input API operation contract (OpenAPI/DTO/schema), target endpoint, expected invariants, and authorization status. Purpose is `fuzz` or `security` (`lane: api`). ## Core Rules - **`[API-FUZZ-01]` Discovery vs Robustness**: Distinguish content discovery (wordlist bruteforce) from structured fuzz testing. Fuzzing validates contract violations, unexpected 500s, unauthorized state changes, and resource exhaustion under malformed inputs. - **`[API-FUZZ-02]` Four Contract-Derived Oracles**: Assert 4 invariants against approved operation contracts: 1. *Crash Resilience*: No unhandled 500/502/504 errors; invalid inputs return contract-approved 4xx; valid boundary cases return contract-approved 2xx. 2. *Contract Conformance*: Payloads match approved success/error schemas without stack traces or path leaks. 3. *State & Isolation*: No unauthorized state mutation, unpermitted field updates, or cross-tenant leakage. …
Read the whole file at its exact version.
How to install
mdr add hoangnguyen0403/agent-skills-standard/quality-engineering-api-fuzz-testing@sha256:ffbee5a3c107e5bdThe line at the top of this page pins the label git:20261027.7209c6c, 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_5uzqgqmzobmkvaxm)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 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 (5030 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
hoangnguyen0403/agent-skills-standard · 583 stars · license MIT · pushed 2026-11-07 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_5uzqgqmzobmkvaxm GET https://markdownregistry.com/api/v1/resolve?ref=hoangnguyen0403/agent-skills-standard/quality-engineering-api-fuzz-testing GET https://markdownregistry.com/api/v1/blob/ffbee5a3c107e5bd50caeedffcef58dfa7e2dd6dd3c689488d393e21350e0c07
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.
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