feature-flag-test-matrix-reference SKILL.md skillA
feature-flag-test-matrix-reference from testland/qa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add testland/qa/feature-flag-test-matrix-reference@git:20260813.7f38a7fPins git:20260813.7f38a7f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- testland/qa
- Path
plugins/qa-feature-flags/skills/feature-flag-test-matrix-reference/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260813.7f38a7f, committed Aug 13, 2026
- First version recorded
- Jul 20, 2026
- Size
- 11,722 bytes
- Repository stars
- 11
- License
- MIT
Feature-flag test matrix design: the flag-state combinatorics problem (N flags × M variants × K user-segments = N×M×K test cases), the canonical coverage strategies (pairwise interaction coverage; default-only smoke; full matrix; risk-driven matrix), the workflow for building the coverage suite from a flag inventory (grep-based inventory, per-flag classification, PICT pairwise generation, per-cell test skeletons), the dedicated kill-switch test categories…
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
# feature-flag-test-matrix-reference ## Overview A codebase with N feature flags, each having M variants, and users in K segments, has N × M × K possible flag-state-segment combinations. At realistic numbers (50 flags, 2 variants each, 5 segments) that's 500 - and at 50 flags with 3 variants and 10 segments, it's 1500. Testing every combination is infeasible, so the matrix has to be sampled deliberately rather than enumerated. This skill is both the reference (the combinatorics + strategies below) and the coverage-suite-building workflow (see Building the coverage suite); the per-SDK test mechanics live in `launchdarkly-testing` and `openfeature-sdk-testing`. ## When to use - Designing the test surface for a new flag-heavy product. - Auditing existing flag-test coverage - are critical combinations covered? - PR review of a new flag - does it create a coverage gap? - Investigating an "only happens with flag X + flag Y on" incident. ## How to use 1. Inventory the flags: list every flag, its variant count (M), and the user segments (K) it targets. 2. Size the problem: compute N × M × K to confirm full enumeration is infeasible and sampling is required. …
Read the whole file at its exact version.
How to install
mdr add testland/qa/feature-flag-test-matrix-reference@sha256:7b123a4de435cafcThe line at the top of this page pins the label git:20260813.7f38a7f, 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_txciv7jut4b4yp7q)
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Versions
The registry has recorded 5 versions of this file, between Jul 20, 2026 and Aug 13, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260813.7f38a7f latest | 2026-08-13 | 7f38a7f | 11,722 B | A | view · diff |
| git:20260813.0ecb572 | 2026-08-13 | 0ecb572 | 11,740 B | A | view · diff |
| git:20260726.19ddd36 | 2026-07-26 | 19ddd36 | 9,021 B | A | view · diff |
| git:20260724.d4db756 | 2026-07-24 | d4db756 | 6,854 B | A | view · diff |
| git:20260720.b72674a | 2026-07-20 | b72674a | 7,160 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 (11722 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
testland/qa · 11 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_txciv7jut4b4yp7q GET https://markdownregistry.com/api/v1/resolve?ref=testland/qa/feature-flag-test-matrix-reference GET https://markdownregistry.com/api/v1/blob/7b123a4de435cafcf9fff7b7975c013e510699121a16f6ec7573324764328860
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.