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/flux-substitution/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/flux-substitution)<a href="https://agentmods.dev/skills/aviator-coding/home-ops/flux-substitution"><img src="https://agentmods.dev/badge/skills/aviator-coding/home-ops/flux-substitution/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/flux-substitution"><img src="https://agentmods.dev/badge/skills/aviator-coding/home-ops/flux-substitution.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 | $0.00079 | $0.00566 |
| Opus 5.5 | $0.00032 | $0.00226 |
| Sonnet 5.5 | $0.00016 | $0.00113 |
| Haiku 4.5 | $0.00008 | $0.00057 |
Grade A, and why
flux-substitution 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.
What it actually says
Flux postBuild.substitute and literal ${...} tokens
Flux strict-mode envsubst runs over the entire built Kustomization, not
one resource. A literal ${...} that is not a substitution variable fails
that whole Kustomization. Flux reports the first failure only, so fixing
one collision can reveal the next.
postBuild.substituteFrom reads the cluster-secrets Secret. Inline
postBuild.substitute on the overlay is the per-app map. One map per
Kustomization.
Tripwires
- Neither flate nor
task flux:test:allcatches this. The cluster runsStrictPostBuildSubstitutions=true(opt-out since kustomize-controller v1.9). flate calls the samefluxcd/pkg/envsubstin lenient mode: an undefined${VAR}expands to empty and the run still passes. A green PR can freeze the Kustomization on the next reconcile. Detect live withflux get ks -A --status-selector ready=false(the message names the variable). - Three fixes, pick by what the token is. Do not escape a real
missing variable, and do not disable substitution on a resource that
needs
${SECRET_DOMAIN}. fixes.md - A declared substitute key that no manifest reads is not
documentation. Delete it. Only
KOPIUR_*andVOLSYNC_*identity variables drive movers. Skillflux-gitops.
Where things live
| What | Path |
|---|---|
| Per-app substitute map | kubernetes/apps/main/<ns>/<app>.yaml postBuild.substitute |
| Cluster secrets | cluster-secrets Secret, referenced by substituteFrom |
| Disable on one resource | annotation kustomize.toolkit.fluxcd.io/substitute: disabled |
| Escape a literal | $${...} in the manifest |
Verify
- After a dashboard, ConfigMap, or env edit, search the built output for
${that is not a known Flux variable. - Live:
flux get ks -A --status-selector ready=false.
What ships with it
1 file 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 Changed · +29 lines 41b21c48b16d
- 1mo ago First seen · 20 lines · 79 tokens per session scan A dbf6445e6ce8
flux-substitution is a skill published in the GitHub repository Aviator-Coding/home-ops (3 stars, last pushed today), licensed MIT. It adds 79 tokens to every session and 566 once invoked, about $0.0003 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 2026-09-04.
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