openclaw - 💡(How to fix) Fix [Bug] openai-codex/gpt-5.5 fails with TypeError: listRegisteredPluginAgentPromptGuidance is not a function (v2026.5.18)

Bug type

Bug (runtime TypeError on GPT-5.5 model)

Summary

On OpenClaw v2026.5.18 (stable), any request targeting gpt-5.5 — whether via openai-codex/gpt-5.5 or openai/gpt-5.5 — fails immediately with:

TypeError: (0 , _pluginRuntime.listRegisteredPluginAgentPromptGuidance) is not a function

The run fails before any model response is generated (0 tokens in/out, ~2s runtime). Other models on the same openai-codex provider (gpt-5.4, gpt-5.4-mini) work correctly.

Steps to reproduce

1. Configure openai-codex provider with OAuth auth on OpenClaw v2026.5.18.
2. Spawn a subagent (or send a message) with model: "openai-codex/gpt-5.5".
3. Observe immediate failure with the TypeError above.
4. Repeat with model: "openai/gpt-5.5" — same error.
5. Repeat with model: "openai-codex/gpt-5.4" or model: "openai-codex/gpt-5.4-mini" — works fine.

Expected behavior

gpt-5.5 should complete the run like gpt-5.4 does.

Actual behavior

status: failed: TypeError: (0 , _pluginRuntime.listRegisteredPluginAgentPromptGuidance) is not a function
Stats: runtime 2s • tokens 0 (in 0 / out 0)

Environment

• OpenClaw version: 2026.5.18
• Operating system: macOS (Darwin 25.5.0, arm64 / M1 Pro)
• Install method: npm global
• Node: v24.14.0
• Provider: openai-codex (OAuth mode)
• Auth: Codex OAuth (ChatGPT Pro subscription, profile healthy per openclaw models status)

Provider config (sanitized)

"openai-codex": {
  "api": "openai-codex-responses",
  "auth": "oauth",
  "baseUrl": "https://api.openai.com/v1",
  "models": [
    { "id": "gpt-5.4", "contextWindow": 1048576, "maxTokens": 32768 },
    { "id": "gpt-5.4-mini", "contextWindow": 400000, "maxTokens": 32768 },
    { "id": "gpt-5.5", "contextWindow": 1048576, "maxTokens": 32768 }
  ]
}

Additional context

• This is not the OAuth 401 issue fixed by PR #73588 (released in v2026.4.29). Auth is working — gpt-5.4 and gpt-5.4-mini complete successfully on the same provider.
• The error suggests the GPT-5.5 code path calls _pluginRuntime.listRegisteredPluginAgentPromptGuidance which does not exist in the current pluginRuntime exports, indicating a missing export or version mismatch between the 5.5 model handling code and the plugin runtime module.
• Related issues: #70834, #73559, #81175 (different errors but same model).
• Tested both openai-codex/gpt-5.5 (direct provider) and openai/gpt-5.5 (via agentRuntime codex) — both fail with the same TypeError.