openclaw - 💡(How to fix) Fix Mattermost streaming config: documented but not implemented + notification UX bug [1 comments, 1 participants]

Summary

The Mattermost streaming configuration option is documented but not implemented. Additionally, the preview streaming behavior that does exist causes notification issues where users are alerted on draft creation but not when the final answer is ready.

Bug 1: streaming config key is silently discarded

Expected Behavior

Per documentation, channels.mattermost should accept:

{
  "channels": {
    "mattermost": {
      "streaming": "partial"  // off | partial | block | progress
    }
  }
}

Actual Behavior

1. Adding "streaming": "partial" to openclaw.json saves successfully
2. OpenClaw rewrites the config file and removes the streaming key entirely
3. The old boolean "blockStreaming": false is the only recognized streaming-related key

Evidence

# Immediately after manual edit:
$ python3 -c "import json; c=json.load(open('openclaw.json')); print('streaming' in c['channels']['mattermost'])"
True

# After OpenClaw processes config:
$ python3 -c "import json; c=json.load(open('openclaw.json')); print('streaming' in c['channels']['mattermost'])"
False

Bug 2: Preview streaming creates notification UX problem

Current Behavior (with default/boolean streaming)

1. User sends message → agent starts processing → draft preview post is created → user gets notification
2. User opens app → sees incomplete thinking/tool output
3. Final answer arrives as an edit to the same post → no new notification
4. User misses the response or has to keep checking manually

Root Cause

Because the only available behavior is the old boolean blockStreaming, there is no way to:

• Create drafts silently and only notify on final post
• Or re-notify when the final answer is ready

Suggested Fixes

• Option A: Implement the documented streaming key with partial/block/progress/off values
• Option B: If keeping blockStreaming as fallback, add finalNotification: true to send a brief follow-up ping when the stream finalizes
• Option C: Allow creating preview drafts silently (no notification) and only notify on the final post

Environment

• OpenClaw version: v2026.4.23
• Channel: Mattermost
• Config: channels.mattermost with blockStreaming: false (old boolean, only available option)

Related

Previous issue with partial analysis: #71565 (superseded by this one)