tf_provider/docs/20_discovery/session_report_2026-02-20.md

Session report 2026-02-20

Issue

The new gen_v2 Update template only used plan.ID when running modify. In Terraform update operations, plan.ID can be unknown, so the provider passed an empty instance ID and failed with "missing instance id for modify".

Fix

The Update template now reads both plan and state, then falls back to state.ID when plan.ID is null or unknown. The resolved instance ID is used for modify and for the subsequent state refresh.

Why this should work

state.ID is always known for an existing resource in Terraform state. Using it guarantees a valid instance ID during update, matching the previous generator behavior and preventing empty-ID modify calls.