Paul HittandClaude Opus 4.8
c9e386ec0d
`isRenderable` asked `kind !in Kind.CONTROL` — an allowlist of the four control kinds that existed when it was written. A control kind from a newer peer is in no set here, so it fell through and rendered as an "[unsupported attachment]" bubble: a message the user can neither read nor act on, for something addressed to a layer rather than a person. Every control kind added from here would have shipped that to every older install. `ctl: 1` is the flag that stops it; `isControl` trusts the flag as well as the list, since the four that predate it do not carry it and never will. ⚠️ `needsNewerClient` is deliberately NOT part of `isRenderable`. Unknown *content* already parses to a placeholder and is shown, which is right — the first cut of this change suppressed it and an existing test caught that immediately. Dropping a real message silently is the one failure a messenger cannot make, so the flag decides rather than the unknown-ness. engine 144, client 90, app 32. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>