refactor: 本仓升为唯一源（原 sap-cli 源码仓归档）

方向反转：此前 SKILL.md 是「模板渲染产物」、sap-cli 是源；现 sap-cli 归档，
sap-cli-skill 承接开发与分发，SKILL.md 回归手工维护的正本。

迁移（来自 sap-cli，共 104 文件）：
- tests/           692 例测试（15 个文件的内联 sys.path 改指 assets/）
- openspec/        SDD 规格与归档变更（42 文件）
- docs/            开发文档与 ADT 原理（含 dev/CLAUDE.md、AGENTS.md）
- .claude/         rules 副本 + settings.json（供 Claude Code）
- .github/ .hermes/ .pre-commit-config.yaml .editorconfig CLAUDE.md
- scripts/ 保持仅 setup.py（pack_skill.py 已随旧仓归档，不迁）

修复（迁移暴露的真实缺陷）：
- assets/pyproject.toml 的 build-backend 写作 `setuptools.backends._legacy:_Backend`，
  该模块在 setuptools 中不存在 → `pip install -e` 从来装不上。改为 build_meta。
  实测：临时 venv 安装成功，sap-cli --help 正常列出 31 个命令
- pyproject readme 指向不存在的 assets/README.md（editable 安装会失败）→ 改内联文本
- pyproject urls 改指 sap-cli-skill

机制调整：
- .github/workflows/ci.yml 适配 assets/ 布局；顶部注明该工作流仅 GitHub 执行，
  本仓在 Gitee 不会自动跑
- pre-commit 增本地测试门禁（Gitee 上真正生效的那道）
- .gitignore 合并旧仓完整规则（保留 log/ 下 md 知识库入库，只忽略运行日志）
- 大文件上限 100KB→1MB（架构图 512KB）

守卫测试 tests/unit/test_repo_guards.py（10 → 18 例）：
- SKILL.md 须记录 parser 全部 CLI 命令 / 铁律 1-5 须为真实小节标题 / 示例不得违反铁律 5
- references/ 规则齐备；.claude/rules 与 references 必须一致（实测抓到一次真实漂移）
- VERSION == sapcli.__version__ == README 版本
- 仓内不得再出现 pack_skill.py / skill-src（防废弃流程回潮）

698 tests OK；editable 安装与 CLI 入口经临时 venv 实测通过。
docs/RELEASING.md 重写为单源开发流程。

openspec/changes/archive/2026-06-09-base-core/tasks.md

@@ -0,0 +1,69 @@
+## 1. Project Scaffolding & Entry Point
+
+- [x] 1.1 Create main.py entry point with argparse subcommand pattern
+- [x] 1.2 Set up UTF-8 encoding for stdout/stderr
+- [x] 1.3 Set up logging to log/adt_tools.log
+
+## 2. SAP ADT Connection
+
+- [x] 2.1 Implement ADTClient with HTTP Basic Auth + CSRF Token
+- [x] 2.2 Support stateful/stateless session modes
+- [x] 2.3 Implement context manager (`with ADTClient(...) as client:`)
+- [x] 2.4 Disable SSL verification warnings
+
+## 3. Configuration Loading
+
+- [x] 3.1 Implement config.ini parsing with ConfigParser
+- [x] 3.2 Support environment variable override (SAP_HOST, SAP_CLIENT, SAP_USER, SAP_PASSWORD)
+- [x] 3.3 Support config file search order (--config → current dir → script dir)
+- [x] 3.4 Default client to "100" when not specified
+
+## 4. Object Type Registry
+
+- [x] 4.1 Define ObjectTypeConfig with URI templates, content types, has_source flag
+- [x] 4.2 Register 10 ABAP object types (report, class, interface, function, functiongroup, domain, dataelement, table, structure, tabletype)
+- [x] 4.3 Implement parse_object_name for URI expansion
+- [x] 4.4 Handle function type special naming (GROUP/MODULE format)
+- [x] 4.5 Handle tabletype uppercase naming
+
+## 5. Download Command
+
+- [x] 5.1 Implement object existence check (HEAD/GET)
+- [x] 5.2 Implement source code download with LF normalization
+- [x] 5.3 Auto-create output directory
+- [x] 5.4 Print source code preview (first 20 lines)
+
+## 6. Sync Command
+
+- [x] 6.1 Implement full pipeline: lock → write → unlock → syntax check → activate
+- [x] 6.2 Auto-create object when not exists
+- [x] 6.3 Support --corr_nr for transport request binding
+- [x] 6.4 Handle lock failure with transport request selection
+- [x] 6.5 Report progress per step with ✓/✗ indicators
+
+## 7. Create Command
+
+- [x] 7.1 Implement default template generation per type
+- [x] 7.2 Support --source for custom source code
+- [x] 7.3 Support --definition for DDIC JSON definitions
+- [x] 7.4 Support --corr_nr for transport request in creation
+- [x] 7.5 Support --path for project manifest update
+
+## 8. Info Command
+
+- [x] 8.1 Query object metadata via ADT GET
+- [x] 8.2 Parse ADT core XML for name, type, description, status, author
+- [x] 8.3 Validate response name matches request name
+- [x] 8.4 Display status as ✓ 已激活 or ⚠️ 未激活
+
+## 9. Delete Command
+
+- [x] 9.1 Check object existence before deletion
+- [x] 9.2 Require user "yes" confirmation
+- [x] 9.3 Execute lock → DELETE → unlock flow
+- [x] 9.4 Support --path for manifest update
+
+## 10. Error Handling
+
+- [x] 10.1 Define unified exception hierarchy (SapCliError base + 11 subtypes)
+- [x] 10.2 Exit with code 1 and user-friendly message on SapCliError