hermes - 💡(How to fix) Fix `extract_media()` regex missing `.md` and other text-based extensions, mismatch with `extract_local_files()` [2 pull requests]

Bug Description

BasePlatformAdapter.extract_media() cannot extract .mdfiles (and several other text-based formats), whileextract_local_files()correctly recognizes them. This causes to be sent as plain text instead of a native file attachment.

Root Cause

Commit ea49b3862 removed the |\S+ fallback from the extract_media() regex (to fix Mattermost false positives), leaving only a hardcoded extension list. This list is missing several extensions that extract_local_files() supports:

In extract_media() regex (line ~2416):

png|jpe?g|gif|webp|mp4|mov|avi|mkv|webm|ogg|opus|mp3|wav|m4a|flac|epub|pdf|zip|rar|7z|docx?|xlsx?|pptx?|txt|csv|apk|ipa

In extract_local_files() (line ~2458-2475), additionally includes:

.md, .doc, .odt, .rtf, .ods, .tsv, .json, .xml, .yaml, .yml, .ppt, .odp, .key, .tar, .gz, .tgz, .bz2, .xz, .html, .htm,
.tiff, .svg, .bmp

Reproduction

1. Use send_message tool on any platform (tested on Weixin):
   • send_message(message=" target="weixin")
2. Expected: file delivered as native attachment
3. Actual: literal string ` sent as text

Environment

• Hermes Agent latest (post ea49b3862)
• Platform: Weixin (likely affects all platforms)
• File in allowed cache directory (~/.hermes/cache/documents/)

Suggested Fix

Sync the extract_media() regex extension list with extract_local_files(), or better yet, extract the shared extension list into a constant used by both methods.