Merge pull request #1447 from jdrhyne/fix/slack-filetype-deprecation

fix(slack): remove deprecated filetype field from files.uploadV2 [AI]

CHANGELOG.md

@@ -33,6 +33,7 @@ Docs: https://docs.clawd.bot
 
 ### Fixes
 - Control UI: ignore bootstrap identity placeholder text for avatar values and fall back to the default avatar. https://docs.clawd.bot/cli/agents https://docs.clawd.bot/web/control-ui
+- Slack: remove deprecated `filetype` field from `files.uploadV2` to eliminate API warnings. (#1447)
 
 ## 2026.1.21
 

src/slack/send.ts

@@ -94,7 +94,7 @@ async function uploadSlackFile(params: {
     file: buffer,
     filename: fileName,
     ...(params.caption ? { initial_comment: params.caption } : {}),
-    ...(contentType ? { filetype: contentType } : {}),
+    // Note: filetype is deprecated in files.uploadV2, Slack auto-detects from file content
   };
   const payload: FilesUploadV2Arguments = params.threadTs
     ? { ...basePayload, thread_ts: params.threadTs }