v9.4.0

9.4.0 (July 22, 2026)

ENHANCEMENTS:

• feat(tls_subscription_validation): expose computed certificate_id, allowing issuance-dependent resources to be chained in a single apply (#1345)
• feat(tls/subscription): include subscription ID and domains in fastly_tls_subscription API error messages so failing resources can be identified when managing many subscriptions (#1344)

BUG FIXES:

• fix(logging): Validate logging format length (max 12288 characters) at plan/validate time instead of failing at apply time (#1342)
• fix(tls_subscription): allow configuration_id attribute changes to be updated without requiring a resource replacement (#1353)
• fix(tls_subscription_validation): key resource validity on certificate presence instead of issued state, so subscriptions in renewing state no longer destroy/recreate the validation resource on refresh (#1345)
• fix(tls_activation): fail fast with an actionable error when certificate_id is empty (certificate not yet issued) instead of an opaque API 400; document that managed subscription domains are auto-activated by Fastly and must not be paired with fastly_tls_activation (#1345)