hhuang91 802c7acb81 fix(Slack): resolve Slack channels by raw ID and enumerate joined channels ...

send_message(target='slack:<channel_id>') failed with "Could not
resolve" because _parse_target_ref had no Slack branch — Slack's
uppercase alphanumeric IDs fell through to channel-name resolution,
which only matched by name. As a fallback, the agent would retry with
bare target='slack' and post to the home channel instead.

Three fixes:

- _parse_target_ref recognizes Slack IDs (C/G/D/U/W prefix) as
  explicit targets so the name-resolver is bypassed entirely.
- resolve_channel_name tries a case-sensitive raw-ID match before
  the existing name match, so any platform's IDs resolve cleanly.
- _build_slack now actually calls users.conversations against each
  workspace's AsyncWebClient (paginated), instead of only returning
  session-history entries. This populates the directory with public
  and private channels the bot has joined, so action='list' shows
  them and they can also be addressed by name. Errors from one
  workspace don't block others.

build_channel_directory becomes async (Slack web calls require it).
The two async-context callers in gateway/run.py are awaited; the
cron ticker thread call bridges via asyncio.run_coroutine_threadsafe.

Slack bot needs channels:read and groups:read scopes for full
enumeration; missing scopes degrade gracefully per-workspace.

addressing #15927

2026-04-26 12:29:02 -07:00

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