HashiCorp Agent Skills is a collection of reusable instructions and plugins that help coding agents work with Terraform and Packer. Developers use it to add HashiCorp product workflows to supported coding-agent tools, either individually or as product bundles.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add hashicorp/agent-skills --skill provider-ephemeral-resourcesgit clone --depth 1 https://github.com/hashicorp/agent-skillsWrote 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/hashicorp/agent-skills/provider-ephemeral-resources)<a href="https://agentmods.dev/skills/hashicorp/agent-skills/provider-ephemeral-resources"><img src="https://agentmods.dev/badge/skills/hashicorp/agent-skills/provider-ephemeral-resources/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/hashicorp/agent-skills/provider-ephemeral-resources"><img src="https://agentmods.dev/badge/skills/hashicorp/agent-skills/provider-ephemeral-resources.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00099 | $0.02112 |
| Opus 5 | $0.00049 | $0.01056 |
| Sonnet 5 | $0.00020 | $0.00422 |
| Haiku 4.5 | $0.00010 | $0.00211 |
Grade A, and why
provider-ephemeral-resources 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 10d 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 — 226 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Terraform Provider Ephemeral Resources
Ephemeral resources (Terraform 1.10+) produce values that are never persisted to state or plan. They exist for exactly one job: handing secrets — tokens, generated passwords, short-lived certificates, decrypted values — to the parts of a configuration that need them, without writing them to disk. Any data source that returns a sensitive value is a candidate to be (or to also exist as) an ephemeral resource.
Official docs: Ephemeral Resources.
When to Use One
| Situation | Use |
|---|---|
| Read-only lookup of non-sensitive data | Data source |
| Value is sensitive and only needed at apply time (DB password for a provider block, token for a write-only attribute) | Ephemeral resource |
| Sensitive value that downstream managed resources must store (e.g. as an attribute) | Regular resource/data source — but pair with write-only attributes where possible |
| Credential that expires mid-operation (STS-style tokens, short-TTL leases) | Ephemeral resource with Renew |
Ephemeral results can be used in provider configuration, write-only attributes, provisioner configuration, and other ephemeral contexts — but not in regular attributes, because those persist to state.
Lifecycle
Terraform calls up to three methods per operation:
Open(required) — fetch or create the value; runs during plan and/or apply whenever the result is needed. There is no state to refresh and nothing to import.Renew(optional) — called when the wall clock passes theRenewAtreturned byOpen/Renew, for values that expire while Terraform is still running. Renew cannot return a new result — it can only extend/refresh whatOpenproduced (e.g. re-lease the same credential); if the value itself changes on renewal, the API is not renewable in this sense andOpenmust return a longer-lived value.Close(optional) — called when Terraform is done with the value; revoke leases or delete temporary credentials here.
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.
- 10d ago First seen · 226 lines · 99 tokens per session scan A e725873b52ad
provider-ephemeral-resources is a skill published in the GitHub repository hashicorp/agent-skills (865 stars, last pushed 5d ago), licensed MPL-2.0. It adds 99 tokens to every session and 2,112 once invoked, about $0.0005 per session on Opus 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 2026-08-30.
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