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Jon Chery 3508671377 refactor(modules): remove thin-composition layer; rewrite all module READMEs

The L2 thin-composition layer (composition.json + contract_resolver.py +
contract schema + sample contracts) has been removed completely. The
implementation was unsatisfactory and is deferred for a later redesign.

- Delete: composition.json x2, contract_resolver.py, contracts/ x2,
  contract.schema.json
- Patch: run_platform.sh now loads a pre-existing IR instance instead of
  resolving a contract (the downstream adapter/checkov/confidence/outbox
  pipeline is unchanged)
- Prune: L2 entries removed from registry.json (L1 entries unchanged)
- Rewrite: all 7 L1 module READMEs in plain language (no jargon), each
  with Resources/Inputs/Outputs/Usage/Compliance-extension-points/Versioning
  sections derived from interface.json
- Add: 2 L2 placeholder READMEs noting the composition is under redesign
- Add: modules-ir/README.md catalog index + README-TEMPLATE.md

---ci---
project: acdl
phase: 17
milestone: v1.3
status: execute
---/ci---

2026-07-22 13:54:40 +00:00

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l1-ecr — ECR repository

Module kind: L1 primitive | Version: 1.0.0

A single ECR repository that hosts the container image for the ECS task. The simplest container-registry module — one resource, two inputs, two outputs.

Resources

Resource	Type	Purpose
repository	`aws_ecr_repository`	The ECR repository

Inputs

Name	Type	Required	Default	Description
`name`	string	yes	—	The ECR repository name
`region`	string	yes	—	AWS region the repository is created in

Outputs

Name	Type	Description
`repository_url`	string	The ECR repository URL
`repository_arn`	arn	The ECR repository ARN

Usage

{
  "id": "ecr",
  "type": "aws:ecr:repository",
  "module": "l1-ecr@1.0.0",
  "inputs": {
    "name": "acdl-microservice",
    "region": "us-east-1"
  }
}

The repository_url output is used to build the image input for l1-ecs-service (e.g. <repository_url>:latest).

Compliance extension points

Image scanning — add image_scanning_configuration { scan_on_push = true } for vulnerability scanning (SOC2 CC7.6, DORA ICT risk testing, HIPAA security monitoring).
Encryption — add encryption_configuration { encryption_type = "KMS", kms_key = ... } with a customer-managed key (SOC2 CC6.1, HIPAA §164.312(a)(2)(iv), GDPR Art.32).
Image tag immutability — add image_tag_mutability = "IMMUTABLE" to prevent tag overwriting (SOX §802, SOC2 CC6.1 integrity, DORA audit integrity).
Lifecycle policy — add aws_ecr_lifecycle_policy to enforce image retention / cleanup (GDPR Art.5(2) data minimization, SOC2 CC5.2).
Access policy — add a repository policy restricting pull/push to known roles (SOC2 CC6.1, HIPAA §164.308(a)(4)).

Versioning

1.0.0 — interface MAJOR, behavior MINOR, lifecycle PATCH. MAJOR bumps require a new registry entry (immutable publication); old entries enter a 12-month deprecation window.

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