[BUG] autoRecall stops firing after OpenClaw upgrade to 2026.3.28 (works in 3.24)

[jlin53882]

Bug Description

After upgrading OpenClaw from 2026.3.24 to 2026.3.28, the before_prompt_build hook registered by memory-lancedb-pro no longer fires for Discord channel messages. As a result, autoRecall completely stops working.

Downgrading back to 2026.3.24 resolves the issue immediately.

---

Environment

• memory-lancedb-pro version: 1.1.0-beta.10 (installed via npm)
• OpenClaw version: 2026.3.28 (broken) → 2026.3.24 (works)
• Plugin install path: ~/.openclaw/extensions/memory-lancedb-pro
• Database: LanceDB with FTS enabled
• rerankEndpoint: http://127.0.0.1:18799/v1/rerank (local)
• Channel: Discord (#ai-小助理, channel_id: 1476858065914695741)

---

Plugin Config

{
  "autoCapture": true,
  "autoRecall": true,
  "autoRecallMinRepeated": 2,
  "sessionStrategy": "memoryReflection",
  "retrieval": {
    "mode": "hybrid",
    "rerank": "cross-encoder",
    "bm25Weight": 0.3,
    "vectorWeight": 0.7
  },
  "scopes": { "default": "global" },
  "sessionMemory": { "enabled": false }
}

Gateway config relevant part:

{
  "hooks": {
    "internal": {
      "entries": {
        "memory-reflection": { "enabled": true }
      }
    }
  }
}

---

Observed Behavior

OpenClaw 2026.3.24 (WORKS)

• before_prompt_build hook fires correctly
• autoRecall injects memories into context
• rerank server receives requests

OpenClaw 2026.3.28 (BROKEN)

• openclaw plugins inspect memory-lancedb-pro shows hooks registered correctly:

  [plugins] memory-reflection: integrated hooks registered (command:new, command:reset, after_tool_call, before_prompt_build, session_end)
  [plugins] hook runner initialized with 2 registered hooks
  

• before_prompt_build hook never fires — no log output, no rerank requests
• Gateway receives Discord message events (confirmed via console), but no agent pipeline activity appears for the Discord channel
• The plugin itself initializes successfully: embedding: OK, retrieval: OK, mode: hybrid, FTS: enabled

---

Diagnostic Observations

1. Hook registration appears correct — the plugin's api.on("before_prompt_build", ...) registers without errors
2. Plugin initialization succeeds — embedding test passes, retrieval test passes, FTS is enabled
3. The issue is at the gateway event dispatch level — Discord messages arrive at gateway but do not trigger the before_prompt_build hook
4. Only affects Discord channel messages — other event hooks like message_received also don't fire for Discord inbound
5. Gateway hook runner shows only 2 hooks registered (likely command:new and command:reset), while before_prompt_build is registered but not executed
6. The agent_end hook is not in the integrated hooks list — only command:new, command:reset, after_tool_call, before_prompt_build, session_end are registered

---

Expected Behavior

before_prompt_build should fire for every meaningful Discord channel message, enabling autoRecall to inject relevant memories before the agent processes the prompt.

---

Possible Related Changes in OpenClaw 2026.3.28

From the OpenClaw architecture docs:

• before_agent_start is now deprecated in favor of before_prompt_build
• Hook event routing may have changed for Discord channel sessions with session.dmScope: per-channel-peer
• The sessionStrategy: "memoryReflection" integration path may have been affected by internal changes

---

Tags

bug, auto-recall, hook-system, discord-channel, openclaw-2026.3.28

[AliceLJY]

This appears to be the same root cause as #397 — both started after the OpenClaw 2026.3.28 upgrade and resolved by rolling back to 3.24.

Since plugin initialization and hook registration succeed but hooks never fire, this is likely an OpenClaw-side change in hook dispatch behavior. Have you filed an issue on the OpenClaw repo? That would help track the fix upstream.

Workaround: stick with OC 3.24, or manually set "sessionStrategy": "memoryReflection" in plugin config (as you noted in #397).