[IAmJSD]

Part of #712. This is slice 4 of the "Scope for #712" plan: CloudFormation schedules, with cleanup as its own commit. Slices 1 to 3 are already on main (#902, #903, #939, #949, #986). The #784 change landed as #895, so nothing in the plan is blocked by it any more. This slice is AWS-only and was never blocked.

Root cause

cloudformation/stacks/CUDly/template.yaml only scheduled collect_recommendations (the ScheduledRule) and process_scheduled_purchases (the daily PurchaseCheckRule). Six other required server tasks had no EventBridge rule, so they never ran on a CloudFormation deployment: finalize_revocations, analytics_collect, reap_stuck_purchases, fire_scheduled_purchases, send_notifications and cleanup. That includes the delayed-purchase fire sweep. The coverage test from #902 listed all six as known cloudformation gaps.

Fix

Each missing task gets one AWS::Events::Rule and one AWS::Lambda::Permission. Each pair is gated by a Schedule<Task> condition on an Enable<Task>Schedule parameter ("true"/"false"), and the schedule comes from a matching <Task>Schedule parameter. The target is LambdaFunction with Input: '{"action": "<task>"}', the same contract the existing rules use. The parameters are listed in a new "Scheduled Tasks" console parameter group.

Task	Default	Schedule	Why
finalize_revocations	on	rate(1 hour)	Not a purchase path.
analytics_collect	on	rate(1 day)	Same default as the Lambda module.
reap_stuck_purchases	off	rate(5 minutes)	The owner decided on #712 that the CFN reap rule ships off. The #894 change has since landed as #1042, but it sets the approved-row floor at 1h20m, which assumes an hourly process sweep. On this stack PurchaseCheckRule runs process only daily, so a reaper would still fail a stranded approval before process re-drives it.
fire_scheduled_purchases	off (opt-in)	rate(15 minutes)	Money path, opt-in per the plan.
send_notifications	off (opt-in)	rate(1 day)	Opt-in per the plan.
cleanup (2nd commit)	off (opt-in)	rate(1 day)	The first run deletes every execution past the 30-day retention.

• The cadence defaults equal the Terraform Lambda module defaults, and a test pins that.

• Rule names are ${AWS::StackName}-Finalize, -AnalyticsCollect, -ReapStuck, -FireScheduled, -SendNotifications and -Cleanup. None is longer than the existing -ScheduledExecution, so every stack name the existing rule accepts still fits EventBridge's 64-character limit.

• The two existing rules are unchanged. That includes the always-on daily PurchaseCheckRule (process), even though the plan's policy makes process opt-in for new schedules: turning it off would stop purchases on existing stacks. The test records it as an explicit exception.

• scheduled_task_coverage_test.go: the cloudformation entry is removed from knownGaps.

• scheduled_task_cfn_test.go (new): parses the template with yaml.v3, rewriting short-form intrinsics to their long form. For every required server task (the roster minus exemptTasks), it checks:

  • there is exactly one rule;
  • the rule has a single target, LambdaFunction.Arn, whose Input is exactly {"action": task};
  • exactly one invoke permission has SourceArn set to that rule, the right action, principal and function, and the same Condition as the rule;
  • only the two pre-existing rules are unconditional;
  • the enable parameter allows exactly "true"/"false", and its default follows the opt-in policy (optInRequired/exemptTasks). Exceptions are listed in cfnDefaultExceptions with reasons, and each one is asserted to still apply;
  • the schedule is a Ref to a parameter whose default equals the Lambda module's *_schedule default;
  • the name suffix is short enough and unique, and State is ENABLED.

  A rule that sends an unknown task fails. A new server task fails until it is scheduled here or listed as a CFN gap.

• Docs (2nd commit): docs/DEPLOYMENT.md and known_issues/33 now describe the opt-in CloudFormation cleanup parameter.

Deploy note

No workflow deploys this template. Customers apply it themselves, so merging deploys nothing. This PR is AWS CloudFormation only. The Azure/GCP deploy pause (since 2026-10-20) does not gate it, and none of its effect waits on that pause. The remaining #712 slices are Fargate, then GCP and Azure; the GCP/Azure ones will wait on the pause.

Verification

All of this is static, fixture and unit evidence. Nothing was deployed and no AWS API was called. cfn-lint and trivy are not installed on this machine, so the template's only machine check here is the yaml.v3 parse plus the structural assertions above. CI's trivy step will scan it.

Fail-before: I put back origin/main's template.yaml with the new test in place.

$ go test -count=1 -run 'TestCloudFormation|TestRequiredTasksWired' ./terraform/modules/compute/
    scheduled_task_cfn_test.go:328: finalize_revocations: want exactly one rule, got []
    scheduled_task_cfn_test.go:328: fire_scheduled_purchases: want exactly one rule, got []
    scheduled_task_cfn_test.go:328: reap_stuck_purchases: want exactly one rule, got []
    scheduled_task_cfn_test.go:328: send_notifications: want exactly one rule, got []
    (and analytics_collect)
    scheduled_task_coverage_test.go:325: cloudformation: undocumented gap: analytics_collect ...
FAIL

The new template with the old knownGaps also fails, with cloudformation: knownGaps lists analytics_collect but it is wired and the same for the other four.

Pass-after, on this branch (head e5bcda0a):

go build ./...                                                    # ok
go vet ./... ; go vet -tags integration ./...                     # ok
go test -count=1 ./terraform/modules/compute/                     # ok
go test -count=1 ./internal/mocks/                                # ok
golangci-lint v2.10.1 run --allow-parallel-runners ./terraform/modules/compute/...   # 0 issues
gofmt -l terraform/modules/compute/                               # clean
bash scripts/check-aws-iam-parity.sh                              # OK (it reads this template)
pre-commit run markdownlint|trailing-whitespace|end-of-file-fixer --files <changed files>   # Passed

• gocyclo does not apply: no non-test Go files changed.
• terraform fmt/validate/test do not apply: no Terraform files changed.

Mutation probes are built into TestCloudFormationScheduleCheckNegatives. Each one edits the real template text and must produce a problem. I checked that each fails for its intended reason:

• a rule removed or its input reassigned;
• an opt-in task switched on;
• a default-on task switched off;
• an exception flipped back to the policy;
• a permission pointing at another rule;
• a permission or rule ungated;
• a name that is too long or reused;
• a literal schedule;
• schedule-default drift from the Lambda module;
• a wrong target ARN;
• an extra input key;
• State: DISABLED;
• an unknown task;
• an enable condition that is not "true";
• a pre-existing rule made conditional.

Long-form Fn::GetAtt is covered too.

Overlap: git merge-tree against #1086, #1090, #1203, #1119, #1114 and fork branches fix/issue-1233 and fix/issue-323 merges cleanly. go test ./terraform/modules/compute/ passes on the merge with #1114, which also edits knownGaps, DEPLOYMENT.md and known_issues/33.

Combined-tree verification. This branch was tested together with the other queued branches on a local, never-pushed tree: queue/platform @ 936996ad = origin/main a14dc8f2 plus these heads, merged in this order:

Branch	Tested head
fix/issue-337	ff3420c
fix/issue-169	7d75eb5
fix/issue-342	66b221f
fix/issue-310	5e11c21
fix/issue-326	5f0ea59
fix/issue-243	365e959
fix/issue-343	6c94036
fix/issue-312	d2848a8
fix/issue-316	acd60dd
fix/issue-339	75ea9b9
fix/issue-339-commitment-type	73bdb19
fix/issue-353	5d25fcd
fix/issue-313	3156bc4
fix/issue-357	53d9e58
fix/issue-368	0ba727d
fix/issue-419	61648c9
fix/issue-111	b04c372
fix/issue-686	0ad90b7
fix/issue-674	793095d
fix/issue-1055	4ec96f1
fix/issue-559	dfa9525
fix/issue-558	034eed4
fix/issue-874	1720539
fix/issue-666	1e120da
fix/issue-668	fb26345
fix/issue-568	ce04173
fix/issue-311	e54f250
fix/issue-177	0cbb88a
fix/issue-151	c21377c
fix/issue-166	41fb77b
fix/issue-27	2d67622
fix/issue-323	69288ae
fix/issue-59	36463e8
fix/issue-43	35e4069
fix/issue-158	6f76f8a
fix/issue-104	bb00491
fix/issue-55	971ef1b
fix/issue-361	89ac220
fix/issue-120	b458719
fix/issue-36	42bac6e
fix/issue-525	57c97dd
fix/issue-712	e5bcda0
fix/issue-72	6cc63ed

fix/issue-72 and fix/issue-312 conflict on one line in internal/api/handler_dashboard.go (both change the calculateCommitmentMetrics call). The tree used #72's side with #312's validated provider variable; whichever PR merges second takes that same resolution.

Linux, Go 1.26.9, AWS_CONFIG_FILE=/dev/null AWS_SHARED_CREDENTIALS_FILE=/dev/null AWS_EC2_METADATA_DISABLED=true; Docker Postgres via testcontainers:

• Passed at 936996ad: go build ./..., go vet ./..., go vet -tags integration ./... and the full go test -race -short -count=1 ./....
• Static checks at 936996ad: golangci-lint v2.10.1 found 0 issues on every changed package, with and without --build-tags integration. tests/e2e is a separate module, so it was vetted under its own e2e tag. gocyclo -over 10 is silent on the changed non-test files.
• Integration tests, every changed package, one package at a time (-tags integration -count=1, 60-minute local timeout because the VM was shared):
  • At 936996ad, these pass: internal/server, internal/credentials, internal/scheduler, internal/database/postgres/migrations, internal/purchase and internal/api.
  • internal/config passes except TestPostgresStoreDB_ResolveStaleRIExchange_ValidatesCloudCheck, which fails the same way on unmodified main (fixed by fix(config): compare resolve checked_at at the database's microsecond precision #1252).
  • These were run on the first build of this tree (26795376, same branches at earlier heads): internal/analytics, internal/auth, internal/commitmentopts, internal/database and cmd/lambda/clear-rate-limit all pass. The later fixes don't touch those packages.
• What the combined run caught, each fixed on its own branch before this PR opened:
  • a compile break between fix/issue-104's test and fix/issue-326's httpToLambdaRequest signature change;
  • fix/issue-316 rejecting legacy-keyed plans;
  • fix/issue-120 versus main's global-filter test.
• Secrets: git-secrets, using the repo's scripts/setup-git-secrets.sh patterns in a fresh repo with an isolated HOME, found nothing in the changed files, and a planted fake key was flagged. scripts/test-git-secrets-allowlist.sh: 137 PASS, 0 FAIL.
• Nothing was applied to any cloud.

Out of scope / for the maintainer

• The CloudFormation stack cannot run the current server at all. It provisions DynamoDB tables and sets no DB_HOST/DB_* environment. initConfigStore (internal/server/app.go) returns DB_HOST must be set, and cmd/server exits with log.Fatalf. So these rules, like the two existing ones, only do anything once the stack is brought up to the Postgres-backed server. I found no issue tracking this; it probably deserves one, and it may affect how much this slice is worth.
• docs/DEPLOYMENT.md still says "Scheduling for AWS Fargate, CloudFormation and GCP is tracked by fix(iac): several scheduled tasks are not scheduled; delayed purchases never fire on GCP/Azure #712". I left that line alone because fix(iac/azure): schedule the server tasks on AKS with CronJobs #1114 rewrites it. Dropping "CloudFormation" from it can follow once both have merged.
• Reap stays off on CFN, per the owner's decision. Turning it on safely would mean also making process hourly here, or giving process an enable/schedule parameter. Changing the existing PurchaseCheckRule is a behavior change for live stacks, so it is not done here.
• process_scheduled_purchases stays always-on on CFN (pre-existing), unlike the opt-in policy elsewhere.

Please mirror the issue's triage labels on this PR: priority/p1, severity/high, urgency/this-sprint, impact/many, effort/m, type/bug, triaged.

Refs #712

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