v6.0.0

[6.0.0] - 2026-07-21

Simplicity-first lifecycle lore turns Flow back into a small, durable serial
workflow:

• Session v5 replaces Session v4 with one canonical feature-run aggregate,
  revision/operation-ID idempotency, session-native validation, derived status,
  and no wall-clock correctness fields.
• Every run receives one independent review. The final feature derives one
  final review requiring broad validation; failed reviews reset to a fresh full
  run instead of entering correction modes, and blocking findings require
  concrete evidence.
• The public surface is reduced to ten tools, five commands, and one hidden
  read-only flow-reviewer.
• Orchestration profiles and admission, audit-ledger rendering, replay and
  prompt-evaluation systems, detached validation receipts, and activation/cache
  repair are removed.
• Installation uses OpenCode's own plugin command with an exact npm version.
  Flow ships no installer, cache inventory, or automatic configuration repair.

Breaking changes: Flow v6 does not migrate active pre-v6 sessions or replay
their operations. Finish or close them before upgrading. Old archives remain
inert history. Validation interrupted before Session v5 persistence must be
rerun, and plugin configuration conflicts require manual repair.