Phase 4 — Run 4: demo Partition Rollout (G-B+C+D)

Overview

Branch / PR: jmpicnic/email-integration-phase-4 (infra) → PR phase-4-G-B-C-D-demo against Arda-cards/infrastructure main. Group(s): G-B + G-C + G-D for demo. Tasks: T-I5-demo, T-D8, T-O1-demo (pre-flight), T-O6 (deploy demo). Working directory: /Users/jmp/code/arda/projects/email-integration-worktrees/phase-4/infrastructure. AWS impact: Resource-touching in Alpha001 (demo.ardamails.com zone + records + secrets + roles). First Alpha001 partition deploy of Phase 4 — operator switches to Admin-Alpha1 profile. Postmark account: PostmarkProd (already approved, ticket #11236087 per K-10). Personas: devops-engineer for T-I5; user as operator for T-O1, T-O6.

Entry criteria

Run-3 PR merged; stage.ardamails.com Sender Signature verified.
Operator pre-flight T-O1-demo green:
- op read "$(... postmarkCredentialOpReference('demo'))" returns non-empty.
- aws sts get-caller-identity --profile Admin-Alpha1 returns Alpha001.
Postmark arda-prod account already approved (no compliance reply needed for this partition).

Tasks

Task	Description	Files touched	Persona
T-I5-demo	Per-partition instance config for `demo`	`src/main/cdk/instances/Alpha001/demo.ts`	`devops-engineer`
T-D8	Infra `CHANGELOG.md` entry	`CHANGELOG.md`	`devops-engineer`
T-O1-demo	Pre-flight checks for `demo`	none (operator-driven)	user
T-O6	Operator runs `./amm.sh Alpha001 demo` after merge	none (operator-driven)	user

Worktree strategy

Single working directory.

Validation

validate-exit.sh parameterised for demo / Alpha001 / Admin-Alpha1 / PostmarkProd. Run with --post-merge after deploy completes.

Exit criteria

npm run build && npm run lint && npm test exit 0.
cdk synth --app apps/Al1x/partition --context partition=demo produces a valid template; CFN stack name is Alpha001-demo-Email.
PR opened; checks green; reviewer approval.
Post-merge: ./amm.sh Alpha001 demo runs end-to-end. dig checks pass for demo.ardamails.com. Postmark Console shows demo.ardamails.com Sender Signature verified on PostmarkProd. Sign-off row populated.

References

../run-2-dev-rollout/project-plan.md — canonical template.
../../choreography.md § 4 — operator gate between run-3 and run-4 (Alpha001 profile switch).