From 57ae4ce40aabab363680719e0dca9cc9b98d078e Mon Sep 17 00:00:00 2001
From: Ed_ <edwardgz@gmail.com>
Date: Sat, 20 Jun 2026 10:58:22 -0400
Subject: [PATCH] TIER-2 READ conductor/code_styleguides/error_handling.md
 end-to-end before Phase 9

Phase 9 = ai_client Batch A: 8 INTERNAL_BROAD_CATCH sites in src/ai_client.py.
ai_client is the AI provider SDK layer (Anthropic/Gemini/DeepSeek/MiniMax).
17 BC sites total (per Phase 1 audit); first 8 sites = Batch A.

The 4 BOUNDARY_SDK sites stay as-is (vendor SDK exceptions are converted).
The 4 INTERNAL_PROGRAMMER_RAISE sites stay as-is (raise AttributeError in
__getattr__ etc.). The 17 INTERNAL_COMPLIANT sites stay as-is.

The 9 INTERNAL_SILENT_SWALLOW and 7 INTERNAL_RETHROW sites are handled in
Phases 11 and 12 respectively.

Target: ai_client BC 17 -> 9 after Batch A.