container-awareness SKILL.md skillA
container-awareness from robsonkades/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add robsonkades/agent-skills/container-awareness@git:20260927.9ecadfdPins git:20260927.9ecadfd in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- robsonkades/agent-skills
- Path
skills/container-awareness/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260927.9ecadfd, committed Sep 27, 2026
- First version recorded
- Sep 3, 2026
- Size
- 10,552 bytes
- Repository stars
- 3
- License
- Apache-2.0
What the JVM actually detects inside a container: cgroup v1 versus v2 detection, ActiveProcessorCount and how a CPU quota becomes a processor count, MaxRAMPercentage and every ergonomic derived from it, GC and JIT thread counts sized from the wrong number, and verifying all of it from inside the running container. Use when a pod is OOMKilled while heap usage is well below Xmx, when a Deployment has no resources.limits or sets limits.memory equal to Xmx, when MaxRAMPercentage is pushed to 90…
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
# Container Awareness ## Purpose Decide whether the JVM's automatic sizing inside this container is the sizing you actually want. HotSpot's `UseContainerSupport` — on by default since JDK 10 on supported Linux builds — incorporates cgroup memory and CPU constraints into ergonomics, using version-specific detection. It does not make the resulting heap, GC thread count or JIT thread count right for the workload. The failure this prevents is the confidently wrong container diagnosis: a pod killed for non-heap charges while the heap sat at 70%, diagnosed without reconciling memory views; or a detected CPU count inferred from the default `ActiveProcessorCount=-1` sentinel. ## Workflow This is Linux HotSpot guidance, with JDK 17–25 as the main command baseline and a JDK 26 heap-default note in the reference. Inspect the runtime image's vendor/update, launch flags, deployment resources and kernel/cgroup version; a build toolchain alone does not identify production ergonomics. Do not upgrade the runtime to match these examples. Start with the requested decision and existing deployment, runtime and measurement artifacts. …
Read the whole file at its exact version.
How to install
mdr add robsonkades/agent-skills/container-awareness@sha256:980cb59c1a036562The line at the top of this page pins the label git:20260927.9ecadfd, 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_ehkpuiik7b7odxen)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 3, 2026 and Sep 27, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260927.9ecadfd latest | 2026-09-27 | 9ecadfd | 10,552 B | A | view · diff |
| git:20260923.832673e | 2026-09-23 | 832673e | 9,982 B | A | view · diff |
| git:20260911.37b054b | 2026-09-11 | 37b054b | 9,592 B | A | view · diff |
| git:20260906.e6ad4bd | 2026-09-06 | e6ad4bd | 8,814 B | A | view · diff |
| git:20260903.f199530 | 2026-09-03 | f199530 | 7,539 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 (10552 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
robsonkades/agent-skills · 3 stars · license Apache-2.0 · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ehkpuiik7b7odxen GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/container-awareness GET https://markdownregistry.com/api/v1/blob/980cb59c1a036562e1a3e1199a19ad590261f212ec520b29f722233f1dd17563
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.