ACP Fallback System - Resilient Agent Execution

Overview

This skill provides automatic fallback for ACP vendors (Codex → Claude → Pi → API) and model fallback for subagents. If one vendor fails, it automatically tries the next.

Usage

For Agents - Use acp_exec Function

# Instead of direct acpx calls, use this wrapper
source scripts/acp-fallback.sh && acp_exec "your task here"

ACP Vendor Priority (in order):

1. codex - Primary (fast, reliable)
2. claude - Fallback #1 (high quality)
3. pi - Fallback #2 (lightweight)
4. direct-api - Final fallback (uses OpenClaw's built-in models)

What Happens on Failure:

• Vendor fails → Auto-retry with next vendor
• All vendors fail → Log error, return failure status
• Success → Return result immediately

Implementation

Core Functions

# acp_exec - Main entry point
# Usage: acp_exec "task description"
# Returns: Vendor used + result

# acp_exec_with_fallback - Full fallback chain
# Tries: codex → claude → pi → direct-api
# Returns: First successful result

# model_fallback - For subagent model switching
# Tries: MiniMax → DeepSeek → OpenAI → GLM-5

Agent Integration

Agents should call these functions instead of direct acpx commands:

• Replace npx acpx codex exec "..." with acp_exec "..."
• Replace single-model subagent with fallback-enabled wrapper

Error Handling

• Network errors: Retry with next vendor after 3s
• Auth errors: Skip to next vendor immediately
• Rate limits: Wait 10s, then retry
• Timeout (>120s): Move to next vendor

Logging

All fallback attempts logged to:

• logs/acp-fallback.log

Success Metrics

Tracked:

• Vendor used
• Number of retries
• Total time
• Success/failure status