feat(openclaw): Add excludeProviders config to skip memory retention for specific channels

[GodsBoy]

Problem

When using the OpenClaw plugin with dynamicBankId: true (default), Hindsight creates separate banks for every messageProvider type. This includes internal/system sessions like heartbeats and cron jobs, which create unknown-default and heartbeat-default banks.

These banks:

• Accumulate noise ("checked email, nothing urgent", "calendar clear")
• Waste LLM tokens on retain operations for low-value content
• Need manual cleanup (via API DELETE) since they auto-recreate on every session

Proposed Solution

Add an excludeProviders (or excludeChannels) config option to the OpenClaw plugin that skips both retain and recall hooks for specified message providers.

{
  "plugins": {
    "entries": {
      "hindsight-openclaw": {
        "config": {
          "excludeProviders": ["unknown", "heartbeat"]
        }
      }
    }
  }
}

Implementation

In hindsight-integrations/openclaw/src/index.ts:

1. Add excludeProviders?: string[] to PluginConfig in types.ts
2. In the before_agent_start hook (auto-recall), check if ctx.messageProvider is in the exclude list and skip
3. In the after_agent_reply hook (retain), same check before retaining

This would prevent bank creation entirely for excluded providers since banks are created lazily on first retain.

Alternatives Considered

• dynamicBankId: false: Merges all channels into one bank, losing per-channel isolation
• Manual cleanup: Works but banks recreate on every session, wasting tokens before deletion
• Cron job to delete banks: Doesn't prevent the token waste from retain operations

Environment

• hindsight-openclaw: 0.4.10
• hindsight-embed: 0.4.10
• OpenClaw: 2026.2.6-3