Investigate Terraform Drift

Investigate Terraform Drift is a skill for Claude Code, Codex from bregman-arie/devops-sre-skills. It costs 20 tokens per session (414 once invoked), scanned A, original, Apache-2.0.

A procedure for finding why deployed infrastructure differs from its Terraform configuration or recorded state. Terraform is a tool that describes and manages cloud resources as code.

In plain words
What is it for?
Use it when a Terraform plan shows surprising changes or monitoring detects configuration drift, especially around replacements, autoscaling, access, or manual hotfixes.
Why use it?
It helps explain unexpected changes before they cause damage and guides a safe choice between updating code, importing resources, ignoring managed differences, or reverting changes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when a Terraform plan shows surprising changes or monitoring detects configuration drift, especially around replacements, autoscaling, access, or manual hotfixes.

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Install with agentmods
npx agentmods add skills/bregman-arie/devops-sre-skills/investigate-drift
Install

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.

Any agent
npx skills add bregman-arie/devops-sre-skills --skill investigate-drift
Clone the repo
git clone --depth 1 https://github.com/bregman-arie/devops-sre-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for Investigate Terraform Drift

README.md
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Your own site
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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.

agentmods 80×15 button for Investigate Terraform Drift

Your own site · 80×15
<a href="https://agentmods.dev/skills/bregman-arie/devops-sre-skills/investigate-drift"><img src="https://agentmods.dev/badge/skills/bregman-arie/devops-sre-skills/investigate-drift.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 414 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00020 $0.00414
Opus 5 $0.00010 $0.00207
Sonnet 5 $0.00004 $0.00083
Haiku 4.5 $0.00002 $0.00041

Measured 12d ago against content hash caf80afbeae0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

Investigate Terraform Drift 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 12d 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.

skills/terraform/investigate-drift/SKILL.md · 67 lines

What it actually says

When to use

Use when a plan shows unexpected changes or monitoring indicates config drift.

Preconditions

  • You can run terraform plan against the workspace/backend.
  • You can inspect change history (VCS and/or cloud audit logs).

Procedure

  1. Run a plan and classify changes: safe/no-op, risky replacement, access-related.
  2. Identify when drift started (compare to deploys and change logs).
  3. Determine the mutator: manual console change, controller, autoscaling, policy.
  4. Decide the source of truth: Terraform config vs external system.
  5. Choose reconciliation: update config, import, ignore changes, or revert manual change.

Decision points

  • Replacement of critical resources: stop and coordinate; avoid apply during incidents.
  • Autoscaled fields: consider lifecycle ignore for managed attributes.
  • Manual hotfix required: capture it in code and remove out-of-band changes.

Verification

  • A new plan is stable (no unexpected diffs).
  • Audit logs align with expected change process.

Rollback / undo

  • Revert config commits that introduced unintended drift.
  • Restore from snapshots/backups if drift caused breakage.

Escalation

  • IaC owners for state manipulation or imports.
  • Security team if drift indicates unauthorized access.

Examples

terraform plan
Changes

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.

  1. 12d ago First seen · 67 lines · 20 tokens per session scan A caf80afbeae0

Subscribe to this mod's changes

Investigate Terraform Drift is a skill published in the GitHub repository bregman-arie/devops-sre-skills (22 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 20 tokens to every session and 414 once invoked, about $0.0001 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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