* fix(slack): honor direct replyToMode when thread label exists
ThreadLabel is a session/conversation label, not a reliable indicator
of an actual Slack thread reply. Using it to force replyToMode="all"
overrides replyToModeByChatType.direct="off" in DMs.
Switch to MessageThreadId which indicates a real thread target is
available, preserving expected behavior: thread replies stay threaded,
normal DMs respect the configured mode.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* Slack: add changelog for threading tool context fix
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>
Adds support for separate replyToMode settings for DMs vs channels:
- Add channels.slack.dm.replyToMode for DM-specific threading
- Keep channels.slack.replyToMode as default for channels
- Add resolveSlackReplyToMode helper to centralize logic
- Pass chatType through threading resolution chain
Usage:
```json5
{
channels: {
slack: {
replyToMode: "off", // channels
dm: {
replyToMode: "all" // DMs always thread
}
}
}
}
```
When dm.replyToMode is set, DMs use that mode; channels use the
top-level replyToMode. Backward compatible when not configured.