Borrowing it
Nothing to install: this file belongs to Aviator-Coding/home-ops. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Aviator-Coding/home-ops/main/.agents/skills/pvc-integrity-checks/SKILL.mdgit clone --depth 1 https://github.com/Aviator-Coding/home-opsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/aviator-coding/home-ops/pvc-integrity-checks)<a href="https://agentmods.dev/skills/aviator-coding/home-ops/pvc-integrity-checks"><img src="https://agentmods.dev/badge/skills/aviator-coding/home-ops/pvc-integrity-checks/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/aviator-coding/home-ops/pvc-integrity-checks"><img src="https://agentmods.dev/badge/skills/aviator-coding/home-ops/pvc-integrity-checks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00045 | $0.01002 |
| Opus 5.5 | $0.00018 | $0.00401 |
| Sonnet 5.5 | $0.00009 | $0.00200 |
| Haiku 4.5 | $0.00005 | $0.00100 |
Grade A, and why
pvc-integrity-checks scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 25d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PVC integrity checks
Two CronJobs in system. An app can be unable to write its own volume, or a
backup mover can be unable to read it, while the pod is Ready, probes pass
and Gatus is green. Nothing else in CI sees that. These jobs are the detector.
They are not interchangeable. Writable answers "can this container write this mount?" Mover-readable answers "can this backup identity read this claim?"
Tripwires
pods/execis never cluster-wide. Discovery is a ClusterRoleBinding. Exec is a ClusterRole with no ClusterRoleBinding, plus one namespaced RoleBinding per covered namespace. The API server denies the rest. Do not "simplify" this into one cluster-wide grant. writable.md- The overlay must not set
targetNamespace. Flux overwritesmetadata.namespaceon every namespaced object, so the per-namespace RoleBindings collapse ontosystemand collide. - A new namespace that should be checked needs a RoleBinding in lockstep
with the CronJob's namespace list. Writable excludes
rook-ceph,databaseandsecuritypermanently. Mover-readable binds onlyai,downloads,home-automation,media,selfhosted.database/pgadminis a permanent gap on the mover check. - UNMEASURED is never a pass. Unmounted claims, subPath-only mounts
(
ntfy), RBAC exclusions, and any walk that hit an error are reported, not counted as readable. mover-readable.md - Alert on kopiur. Report-only for VolSync. VolSync stages its clone
writable, so
fsGrouprepairs permissions before restic reads. kopiur stages read-only and fails closed. The same mismatch is invisible to one engine and fatal to the other. - The four walk traps in
walk.sheach return a silent false-clean zero if reintroduced: busyboxfindhas no-uid/-gid;/tmpis read-only so there is no temp file; stderr is counted, never discarded;stat -c %Fsaysregular empty file, so match the type by prefix.lost+found(0700 root:root) is pruned from descent and statted aside, or every ext4 claim isINCONCLUSIVE. - Identities come from the live
ReplicationSource/SnapshotPolicy, never from component defaults. Real movers span uid 0 through 10000. - Expected read-only is
volumeMounts[].readOnly: true. The pod annotationpvc-writable-check.home-operations.com/skipis an unused escape hatch. Do not use it to silence a real failure. - Do not shell-interpolate a mount path. The walker receives the path as
an argv element. A pod must not be able to inject through its own
mountPath.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 25d ago First seen · 75 lines · 45 tokens per session scan A 01ded48a57bb
pvc-integrity-checks is a skill published in the GitHub repository Aviator-Coding/home-ops (3 stars, last pushed today), licensed MIT. It adds 45 tokens to every session and 1,002 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-29.
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