feat(discord): allow_any_attachment config to accept arbitrary file types

The Discord adapter silently dropped any attachment whose extension wasn't
in the SUPPORTED_DOCUMENT_TYPES allowlist (PDF, text family, zip, office).
Users uploading .wav / .bin / other unrecognized formats saw nothing in
their conversation — the file got logged as 'Unsupported document type'
and discarded before the agent ever saw it.

Add discord.allow_any_attachment (default false) to bypass the allowlist.
When on:
  - Any file is downloaded, cached under ~/.hermes/cache/documents/, and
    surfaced as a DOCUMENT-typed event with application/octet-stream MIME
  - gateway/run.py already emits a context note with the cached path,
    auto-translated via to_agent_visible_cache_path() for Docker/Modal
    sandboxed terminals
  - File body is NOT inlined — only the path — so binary uploads don't
    blow up the context window
  - Allowlisted text formats (.txt/.md/.log) keep their 100 KiB inline
    behavior unchanged

Also adds discord.max_attachment_bytes (default 32 MiB matches the
historical hardcoded cap; 0 = unlimited) since users opting into arbitrary
types may want to raise the cap. The whole attachment is held in memory
while being cached, so unlimited carries a real memory cost.

Env overrides: DISCORD_ALLOW_ANY_ATTACHMENT, DISCORD_MAX_ATTACHMENT_BYTES.

Discord-only by deliberate scope. Telegram has hard 20 MB API limits and
Slack has its own caps — extending the same flag there is a separate
follow-up if/when requested.
This commit is contained in:
teknium1 2026-05-16 20:25:47 -07:00 committed by Teknium
parent 3b39096904
commit 407a11b419
5 changed files with 258 additions and 10 deletions

View file

@ -258,6 +258,8 @@ For cloud sandbox backends, persistence is filesystem-oriented. `TERMINAL_LIFETI
| `DISCORD_REQUIRE_MENTION` | Require an @mention before responding in server channels |
| `DISCORD_FREE_RESPONSE_CHANNELS` | Comma-separated channel IDs where mention is not required |
| `DISCORD_AUTO_THREAD` | Auto-thread long replies when supported |
| `DISCORD_ALLOW_ANY_ATTACHMENT` | When `true`, accept attachments of any file type (not just the built-in PDF/text/zip/office allowlist). Unknown types are cached and surfaced to the agent as a local path so it can inspect them via `terminal` / `read_file` / `ffprobe`. Default `false`. |
| `DISCORD_MAX_ATTACHMENT_BYTES` | Maximum bytes per attachment the gateway will cache. Default `33554432` (32 MiB). Set to `0` for no cap (attachments are held in memory while being written). |
| `DISCORD_REACTIONS` | Enable emoji reactions on messages during processing (default: `true`) |
| `DISCORD_IGNORED_CHANNELS` | Comma-separated channel IDs where the bot never responds |
| `DISCORD_NO_THREAD_CHANNELS` | Comma-separated channel IDs where bot responds without auto-threading |