[dougyau]

Pitako pingdotgg#56 intentionally stopped emitting mode for new Architect tables. T3 still required it, so the authenticated bridge rejected valid replies and the table never reached the archive.

Update the passive protocol snapshot and carry the optional legacy field through validation, ingestion, queries, and the shared client model without inventing a default. Keep historical records readable, reject malformed current compositions, and preserve composition reasons and member mandates.

Exclude the two verbatim protocol copies from formatting so the normal commit hook preserves their upstream bytes.

Verification

• 230 focused tests pass across six files, including two real native CLI tests with offline providers.
• Scoped lint, configuration formatting, and diff checks pass. Independent review of the complete 16-file diff found no blockers.
• Six affected compiler subprocesses returned zero. Server typechecking still reports five existing cleanup TS2339 errors. The enclosing compiler tool failed with owned process group remained after close; this is not an all-green typecheck result.
• No installed rebuild or positive live-archive or visual verification is claimed.

Model: GPT-6.1 Sol. Harness: Pi with Pitako. Independent review: GPT-6 Sol.