plugin-metadata-lockstep-update

Summary

The design record for itd-69 as delivered in v0.1.0: launch.CheckLockstep reads the version and manifest fields across the plugin's duplicated metadata surfaces and refuses drift; written on 2026-09-21 to close a record that shipped without one.

Scope, as delivered

1. The check (internal/core/launch/lockstep.go): the ADR-pinned path list (plugin.json in both locations, .claude-plugin/marketplace.json), per-field comparison, a distinct result for agreement, drift, non-semver and an unreadable contract (criterion 1).
2. The tree rule: TreeDev requires absent version keys per adr-19 and reports a present one as drift; TreePublic requires agreement (criterion 2).
3. No bypass: the check exposes no skip or dirty flag; launch --dry-run runs it unconditionally and the release gate reads its result (criterion 3).

How the criteria are satisfied

All three by scope 1 to 3 as shipped (lockstep_test.go: agreement, drift, non-semver, contract unreadable, dev keys absent).