- SendAddonMessage sends on the real 1.12 lane — an ordinary chat message wearing the addon-language sentinel — across the party, raid, guild and battleground channels, byte-verified in the client binary
- the receive half fires CHAT_MSG_ADDON with the client's own four-argument shape, and the two halves are round-tripped against each other so they cannot drift apart silently
- the `|`-escape scan is carved from the binary: colour escapes inside a message survive exactly as the real client allows them
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
