AWS EC2 Instance Type module

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A discussion dedicated to the AWS EC2 Instance Type module. Share your thoughts, questions, and feedback here.

Module Scorecard

Presentation & Onboarding	Credential Hygiene	Restricted-Environment Readiness	Engineering Quality	Overall
17 / 17	16 / 16	N/A	10 / 10	100 / 100

Drilldown

Track: Utility (parameter helper for AWS EC2 instance type selection — no agent/IDE concerns apply)

Presentation & Onboarding — 17 / 17

Criterion	Max	Score	Notes
Configuration-mode examples	12	12	README covers all major modes with sensible defaults: basic usage, family selection via include, label/tooltip overrides via custom_metadata, architecture-aware AMI lookup via instances output, and create_parameter = false to skip the picker.
Visual preview	5	5	README embeds ; verified to exist (80.6 KB).

Credential Hygiene — 16 / 16

Criterion	Max	Score	Notes
Secrets marked sensitive	16	16	Module has no sensitive inputs (only instance type/metadata config) and no README example involves any secret or key, so the criterion is trivially satisfied.
Non-hardcoded auth path	4	N/A	Module performs no authentication or credentialed access of any kind (pure Terraform parameter/data construct); the concern does not exist by construction, so this sub-criterion is excluded from the denominator.

Restricted-Environment Readiness — N/A (excluded)

Criterion	Max	Score	Notes
Mirrorable artifact source	5	N/A	Module downloads nothing; it reads a bundled static instance-types.json shipped in the repo via file(). No download URL variable exists.
Bring-your-own binary	10	N/A	No binary or tool is installed by this module — N/A by construction.
Egress transparency	3	N/A	No network calls are made at install or runtime; nothing to enumerate.
Runs without sudo	2	N/A	The only shell script (.scripts/update.sh) is a maintainer-only catalog-regeneration tool, not executed as part of module install/runtime; the module itself contains no runtime scripts.

Engineering Quality — 10 / 10

Criterion	Max	Score	Notes
Input quality	6	6	All variables (display_name, description, default, create_parameter, mutable, custom_metadata, include, coder_parameter_order) have clear descriptions and sensible defaults; include has a validation block requiring at least one family.
Test coverage	4	4	main.tftest.hcl is comprehensive: covers parameter naming, ordering, defaults, create_parameter toggle, family filtering (single/multiple), label disambiguation, custom metadata overrides, validation failure (empty_include_is_rejected), and derived instances output fields (arch mapping, GPU counts). No UI/TS tests needed since module exposes no coder_app.

Overall — 100 / 100

Raw 43 / 43 → round(43 / 43 × 100) = 100

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Scored against SCORECARD.md on 2026-10-06 with solstice-1.