v1.2.0

What's New in v1.2.0

A large, backward-compatible release: new configuration-generator modes, a much
deeper error-diagnosis database, structured experiment guidance, and new
upstream-parity automation. No tools were removed and no existing response
field changed.

Features

• build_config — preview & diff mode (#95): preview performs a dry-run
  (never writes) and reports targetExists / wouldOverwrite / wouldBackup;
  compareWith returns a unified diff of the result against an existing file.
  Reads are restricted to the configured allowed directories.
• build_config — CI/CD templates (#96): new cicd use case with GitHub
  Actions, GitLab CI, and Azure DevOps templates (automation-friendly OpenTofu
  args plus an optional, correctly-gated auto-approve). options is now optional
  for use cases that have no required variables.
• diagnose_terragrunt_error — modern patterns (#253) and CAS patterns
  (#268): new stack, engine, oci, experiment, and cas categories.
  The database grows from 66 to 110 patterns across 12 categories, with secret
  redaction on the extracted context and a single source of truth for the counts.
• get_guidance — experiment status (#252): experiment gates are surfaced as
  structured experimentGate objects across CLI, HCL, function, and guidance
  responses, plus a new experiments guidance topic.
• Static built-in functions reference (#247): function reference is served
  from curated data, checked against upstream.
• Upstream parity & drift automation (#244, #269): offline parity guards for
  CLI/HCL/function/experiment data pinned to a Terragrunt revision, and a weekly
  workflow that opens/auto-closes an issue when a watched upstream file drifts
  from the pin.

Fixes

• Schema drift detector accuracy (#212): nesting/tier-aware comparison ends
  the recurring false positives; the workflow now auto-closes the drift issue
  when it clears.
• Modernize the CLI reference (#243), preserve documentation metadata (#246),
  use canonical documentation URLs (#249), refresh the docs fixture (#245),
  correct the terragrunt.hcl reference (#242), S3 native lockfile locking (#248),
  and HCL block iteration / CAS handling (#251).

Maintenance

• Migrate Vitest config to v4 top-level pool options (#267).
• Bump GitHub Actions to Node 24 majors (#265).
• Clear Dependabot security alerts — SDK and Vitest bumps (#262).

Installation

npm install
npm run build

Docker

docker build -t terragrunt-mcp-server:1.2.0 .
docker run -i terragrunt-mcp-server:1.2.0