✨ feat(playbook): add no_backup deploy controls

remove obsolete main_language placeholders and language summary template text

limit generated .agents guidance to configured langs and normalize AGENT_RULES trailing newlines

document install_skills no_backup behavior and refresh tests for deployment links and sync flows

playbook.toml.example

@@ -15,7 +15,6 @@
 # force = false                 # 可选：覆盖已有文件
 # no_backup = false             # 可选：跳过备份
 # date = "2026-04-22"           # 可选：替换 {{DATE}}
-# main_language = "tsl"         # 可选：覆盖 {{MAIN_LANGUAGE}}
 
 [sync_memory_bank]
 # 同步 memory-bank/（配置节存在即启用）
@@ -25,7 +24,6 @@
 # force = false                 # 可选：覆盖已有文件（会先备份）
 # no_backup = false             # 可选：跳过备份
 # date = "2026-04-22"           # 可选：替换 {{DATE}}
-# main_language = "tsl"         # 可选：覆盖 {{MAIN_LANGUAGE}}
 
 [sync_prompts]
 # 同步 docs/prompts/（配置节存在即启用）
@@ -33,7 +31,6 @@
 # force = false                 # 可选：覆盖已有文件（会先备份）
 # no_backup = false             # 可选：跳过备份
 # date = "2026-04-22"           # 可选：替换 {{DATE}}
-# main_language = "tsl"         # 可选：覆盖 {{MAIN_LANGUAGE}}
 
 [sync_standards]
 # langs = ["tsl", "cpp", "typescript"]  # 必填：要同步的语言
@@ -44,6 +41,7 @@
 # mode = "list"                 # list|all
 # skills = ["brainstorming"]    # mode=list 时必填
 # agents_home = "~/.agents"     # 可选：默认 ~/.agents
+# no_backup = false             # 可选：跳过备份，直接删除旧 skill 后重装
 
 [format_md]
 # tool = "prettier"             # 仅支持 prettier