feat(ecc): prune plugin 43→12 items, promote 7 rules to .claude/rules/ (#245)

ECC community plugin pruning: removed 530+ non-essential files
(.cursor/, .opencode/, docs/ja-JP, docs/zh-CN, docs/zh-TW,
language-specific skills/agents/rules). Retained 4 agents,
3 commands, 5 skills. Promoted 13 rule files (8 common + 5
typescript) to .claude/rules/ for CC native loading. Extracted
reusable patterns to EXTRACTED-PATTERNS.md.

rules/python/coding-style.md

@@ -1,42 +0,0 @@
----
-paths:
-  - "**/*.py"
-  - "**/*.pyi"
----
-# Python Coding Style
-
-> This file extends [common/coding-style.md](../common/coding-style.md) with Python specific content.
-
-## Standards
-
-- Follow **PEP 8** conventions
-- Use **type annotations** on all function signatures
-
-## Immutability
-
-Prefer immutable data structures:
-
-```python
-from dataclasses import dataclass
-
-@dataclass(frozen=True)
-class User:
-    name: str
-    email: str
-
-from typing import NamedTuple
-
-class Point(NamedTuple):
-    x: float
-    y: float
-```
-
-## Formatting
-
-- **black** for code formatting
-- **isort** for import sorting
-- **ruff** for linting
-
-## Reference
-
-See skill: `python-patterns` for comprehensive Python idioms and patterns.

rules/python/hooks.md

@@ -1,19 +0,0 @@
----
-paths:
-  - "**/*.py"
-  - "**/*.pyi"
----
-# Python Hooks
-
-> This file extends [common/hooks.md](../common/hooks.md) with Python specific content.
-
-## PostToolUse Hooks
-
-Configure in `~/.claude/settings.json`:
-
-- **black/ruff**: Auto-format `.py` files after edit
-- **mypy/pyright**: Run type checking after editing `.py` files
-
-## Warnings
-
-- Warn about `print()` statements in edited files (use `logging` module instead)

rules/python/patterns.md

@@ -1,39 +0,0 @@
----
-paths:
-  - "**/*.py"
-  - "**/*.pyi"
----
-# Python Patterns
-
-> This file extends [common/patterns.md](../common/patterns.md) with Python specific content.
-
-## Protocol (Duck Typing)
-
-```python
-from typing import Protocol
-
-class Repository(Protocol):
-    def find_by_id(self, id: str) -> dict | None: ...
-    def save(self, entity: dict) -> dict: ...
-```
-
-## Dataclasses as DTOs
-
-```python
-from dataclasses import dataclass
-
-@dataclass
-class CreateUserRequest:
-    name: str
-    email: str
-    age: int | None = None
-```
-
-## Context Managers & Generators
-
-- Use context managers (`with` statement) for resource management
-- Use generators for lazy evaluation and memory-efficient iteration
-
-## Reference
-
-See skill: `python-patterns` for comprehensive patterns including decorators, concurrency, and package organization.

rules/python/security.md

@@ -1,30 +0,0 @@
----
-paths:
-  - "**/*.py"
-  - "**/*.pyi"
----
-# Python Security
-
-> This file extends [common/security.md](../common/security.md) with Python specific content.
-
-## Secret Management
-
-```python
-import os
-from dotenv import load_dotenv
-
-load_dotenv()
-
-api_key = os.environ["OPENAI_API_KEY"]  # Raises KeyError if missing
-```
-
-## Security Scanning
-
-- Use **bandit** for static security analysis:
-  ```bash
-  bandit -r src/
-  ```
-
-## Reference
-
-See skill: `django-security` for Django-specific security guidelines (if applicable).

rules/python/testing.md

@@ -1,38 +0,0 @@
----
-paths:
-  - "**/*.py"
-  - "**/*.pyi"
----
-# Python Testing
-
-> This file extends [common/testing.md](../common/testing.md) with Python specific content.
-
-## Framework
-
-Use **pytest** as the testing framework.
-
-## Coverage
-
-```bash
-pytest --cov=src --cov-report=term-missing
-```
-
-## Test Organization
-
-Use `pytest.mark` for test categorization:
-
-```python
-import pytest
-
-@pytest.mark.unit
-def test_calculate_total():
-    ...
-
-@pytest.mark.integration
-def test_database_connection():
-    ...
-```
-
-## Reference
-
-See skill: `python-testing` for detailed pytest patterns and fixtures.