opensource-align2: engine 0.164.0-alpha.9 -> 0.166.0 (schema re-derived, method map pinned)

- protocol/ bundles re-derived from official 0.166.0 binary
  (generate-json-schema); v1 83 defs, v2 665 -> 677 defs,
  0 removals; all 21 host methods present, params refs unchanged
- README pin + start.sh comment follow the verified binary
- docs/upstream-166-alignment.md: 0.166.0 alignment record
- tests/test_host_protocol_mapping.py: 21 host methods pinned
  against protocol/ bundles (corrects alignment table's 17-count:
  18 requests incl. initialize + 3 inbound notifications)
- config.example.toml: [[skills.config]] disable semantics doc
  comment only (no effective config change)
- No production binary touched; no push, merge, or deploy.

README.md

@@ -72,8 +72,9 @@ agent 循环 + 沙箱 + 工具 + MCP + skills + 线程持久化
 agent 循环、沙箱、工具执行、上下文压缩、线程存储，全部是官方
 codex 二进制里的，不是我复刻的简化版。
 
-实测版本：`codex-cli 0.164.0-alpha.9`，协议定义就是从它
-导出的，见 `protocol/`。
+实测版本：`codex-cli 0.166.0`，协议定义就是从它
+导出的，见 `protocol/`（2026-11-05 由 0.166.0 二进制重导，见
+`docs/upstream-166-alignment.md`）。
 
 ## 目录