Greptile Summary

Added support for appliedTags parameter to enable tag selection when creating forum/media threads in Discord. The parameter accepts an array of tag IDs that are passed to Discord's applied_tags API field.

Key changes:

• Added appliedTags?: string[] field to DiscordThreadCreate type with proper documentation
• Tags are conditionally included in the request body only for forum/media channels (not regular text channels)
• Parameter properly threaded through all action handlers (message-tool.ts, handle-action.ts, discord-actions-messaging.ts)
• Added comprehensive tests verifying tags are sent for forum channels and omitted for non-forum channels

Implementation details:

• Uses existing readStringArrayParam helper for consistent parameter parsing
• Channel type detection via Discord API to determine if tags should be included
• Falls back gracefully when channel lookup fails (lets Discord validate)
• Handles empty arrays correctly by treating them as no tags

The implementation is clean, type-safe, and follows existing patterns in the codebase.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The change is a straightforward additive feature with clear implementation, proper type safety, comprehensive test coverage, and no breaking changes. The code follows existing patterns and handles edge cases appropriately.
• No files require special attention

_{Last reviewed commit: b09a595}

Landed via temp rebase onto main.

• Gate: bunx vitest run src/discord/send.creates-thread.test.ts src/agents/tools/message-tool.test.ts
• Land commit: 6afac0f
• Merge commit: 7f4d1b7

Thanks @pushkarsingh32!