Spec Sync — Hexagonal Core

Updates existing spec files to reflect implementation decisions made after the spec was written. Produces precise, targeted edits — never rewrites a spec from scratch. Appends a changelog entry to every file it touches.

Step 0 — Understand the gap before touching anything

Do NOT edit any files immediately. First build a clear picture of what changed and why.

Extract from context if already provided:

• Which entities, use cases, or constitution rules changed
• What the old behaviour / design was
• What the new behaviour / design is
• Why the change was made (implementation constraint, new requirement, tech decision)
• Any files or diffs the user has shared