terragrunt-skill

# Terragrunt (1.x) Single skill for all Terragrunt work, organized as a router: identify the task mode below, read ONLY the listed reference(s), then act. References are grep-friendly — prefer `grep` lookups over reading whole files. ## Hard policy 1. **Post-1.0 CLI only.** Never generate or recommend pre-1.0 forms: `run-all`, `plan-all`, `hclfmt`, `hclvalidate`, `graph-dependencies`, `validate-inputs`, `terragrunt-` prefixed flags, the `skip` attribute, `retryable_errors`, or bare `find_in_parent_folders()` pointing at a root `terragrunt.hcl`. If user code contains these, flag them and propose the 1.x form. 2. **Fact-based generation.** Every generated pattern must trace to a documented Gruntwork pattern (references here carry doc links to docs.terragrunt.com). Don't invent layouts. 3. **Knowledge freshness. This skill does not assert what the current Terragrunt release is.** That claim has a half-life of about six weeks and it expired unnoticed: this line said "current stable v1.1.2" while the binary on the author's own machine was already v1.1.3. Run **`scripts/preflight.py`** instead — it reads `terragrunt --version` and reports which of the gates below your build satisfies, which it does not reach, and which upgrade hazards are in effect on it. Everything that follows is a fact about *when a feature landed*, which does not rot. **v1.1.0 graduated six experiments to GA** — `stack-dependencies`, `cas`, `catalog-redesign`, `mark-many-a...