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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

interface.json

docs(P13): plan-as-execute + verify (v1.2.3)

2026-07-21 21:05:48 +00:00

README.md

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

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

README.md

l1-alb — Application Load Balancer (load balancer + target group + listener)

Module kind: L1 primitive | Version: 1.0.0

An Application Load Balancer with a target group and a listener. This is a multi-resource module: it creates a load balancer, a target group, and a listener that forwards traffic to the target group. The target group is what l1-ecs-service registers its tasks with.

Resources

Resource	Type	Purpose
load_balancer	`aws_lb`	Application load balancer in the VPC subnets
target_group	`aws_lb_target_group`	Target group for the ECS service tasks
listener	`aws_lb_listener`	Listener forwarding the LB port to the target group

Inputs

Name	Type	Required	Default	Description
`name`	string	yes	—	Name tag for the load balancer and child resources
`subnets`	string	yes	—	Comma-separated subnet ids (from `l1-vpc`)
`security_group`	string	yes	—	Security group id for the load balancer
`port`	number	no	80	Listener port
`protocol`	string	no	`HTTP`	Listener protocol
`region`	string	yes	—	AWS region the load balancer is created in

Outputs

Name	Type	Description
`lb_arn`	arn	The load balancer ARN
`listener_arn`	arn	The listener ARN
`target_group_arn`	arn	The target group ARN

Usage

{
  "id": "alb",
  "type": "aws:elbv2:loadbalancer",
  "module": "l1-alb@1.0.0",
  "inputs": {
    "name": "acdl-microservice",
    "subnets": "ref:vpc.subnet_ids",
    "security_group": "ref:roles.role_arn",
    "port": 8080,
    "protocol": "HTTP",
    "region": "us-east-1"
  }
}

The target_group_arn output is referenced by l1-ecs-service as its lb_target_group_arn input to wire the service to the ALB.

Compliance extension points

TLS / HTTPS listener — add aws_acm_certificate + ssl_policy + certificate_arn for encryption in transit (SOC2 CC6.1, PCI-DSS 4.1, HIPAA §164.312(e)(1), GDPR Art.32).
Access logs — add access_logs { bucket = ..., prefix = ... } to the load balancer (SOX, SOC2 CC7.2, DORA ICT audit trail).
Security group rules — add ingress/egress rules restricting traffic to known sources (SOC2 CC6.6, PCI-DSS 1.2).
Health check — add a health_check block to the target group (SOC2 CC7.3 monitoring, DORA operational resilience).
WAF — add aws_wafv2_web_acl_association for application-layer protection (SOC2 CC7.6, PCI-DSS 6.5, DORA ICT risk).
Deregistration delay — add deregistration_delay for graceful draining (SOC2 CC9.1 resilience).

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.