observability-driven-testing SKILL.md skillA
observability-driven-testing from petrkindlmann/qa-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add petrkindlmann/qa-skills/observability-driven-testing@v2.1Pins v2.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- petrkindlmann/qa-skills
- Path
skills/observability-driven-testing/SKILL.md- Versions recorded
- 5
- Latest version
- v2.1, committed Oct 21, 2026
- First version recorded
- May 10, 2026
- Size
- 22,378 bytes
- Repository stars
- 198
- License
- MIT
Use production telemetry as INPUT to design new tests. Covers OpenTelemetry integration with tests, trace-based assertions, log-informed test creation, production-error analysis for coverage gaps, and telemetry-driven test prioritization. Use when: "trace-based testing," "design tests from logs," "OpenTelemetry assertions," "production errors point to test gaps," "telemetry-driven testing." Not for: safe rollout techniques (flags, canary) during release — use testing-in-production. Not for…
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
<objective> Production is the richest source of test design input: every error log, slow trace, and latency spike tells you where tests are missing. This skill closes the feedback loop between production observability and test creation, and makes trace structure a test assertion. A `200 OK` that silently hit the database on a path meant to be cache-only passes an HTTP assertion — a trace assertion catches it. Output: instrumented test runners, trace-based assertions, and a production-error-to-test pipeline. </objective> ## Quick Route | Situation | Go to | |-----------|-------| | Make test execution emit traces correlated with the app | OTel test-runner setup (`references/trace-assertions.md`) | | Assert which services were called / no error spans / latency | Traces as Test Evidence | | Turn a Sentry/Datadog error into a test | Production Error to Test Pipeline | | Decide which endpoints need tests next | Telemetry-Driven Test Prioritization | | A trace assertion is flaky or a span never arrives | Failure Modes | --- ## Discovery Questions Check `.agents/qa-project-context.md` first. If it exists, use it as context and skip questions already answered there. …
Read the whole file at its exact version.
How to install
mdr add petrkindlmann/qa-skills/observability-driven-testing@sha256:4fb0195700c1f560The line at the top of this page pins the label v2.1, 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_4izyquyvvvjcrzzv)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 10, 2026 and Oct 21, 2026, about one every 41 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.1 latest | 2026-10-21 | b99ea46 | 22,378 B | A | view · diff |
| v2.0 | 2026-06-10 | bcd1201 | 22,327 B | A | view · diff |
| v1.0 | 2026-05-30 | d9b4edd | 16,177 B | A | view · diff |
| v1.0 | 2026-05-21 | c7fb325 | 21,839 B | A | view · diff |
| v1.0 | 2026-05-10 | 6331521 | 21,625 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 (22378 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
petrkindlmann/qa-skills · 198 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4izyquyvvvjcrzzv GET https://markdownregistry.com/api/v1/resolve?ref=petrkindlmann/qa-skills/observability-driven-testing GET https://markdownregistry.com/api/v1/blob/4fb0195700c1f560e39d281d2534b9f79ef8f062c6ca38e81835d4fd1970be85
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.