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.

.opencode/commands/instinct-export.md

@@ -1,93 +0,0 @@
----
-description: Export instincts for sharing
-agent: build
----
-
-# Instinct Export Command
-
-Export instincts for sharing with others: $ARGUMENTS
-
-## Your Task
-
-Export instincts from the continuous-learning-v2 system.
-
-## Export Options
-
-### Export All
-```
-/instinct-export
-```
-
-### Export High Confidence Only
-```
-/instinct-export --min-confidence 0.8
-```
-
-### Export by Category
-```
-/instinct-export --category coding
-```
-
-### Export to Specific Path
-```
-/instinct-export --output ./my-instincts.json
-```
-
-## Export Format
-
-```json
-{
-  "instincts": [
-    {
-      "id": "instinct-123",
-      "trigger": "[situation description]",
-      "action": "[recommended action]",
-      "confidence": 0.85,
-      "category": "coding",
-      "applications": 10,
-      "successes": 9,
-      "source": "session-observation"
-    }
-  ],
-  "metadata": {
-    "version": "1.0",
-    "exported": "2025-01-15T10:00:00Z",
-    "author": "username",
-    "total": 25,
-    "filter": "confidence >= 0.8"
-  }
-}
-```
-
-## Export Report
-
-```
-Export Summary
-==============
-Output: ./instincts-export.json
-Total instincts: X
-Filtered: Y
-Exported: Z
-
-Categories:
-- coding: N
-- testing: N
-- security: N
-- git: N
-
-Top Instincts (by confidence):
-1. [trigger] (0.XX)
-2. [trigger] (0.XX)
-3. [trigger] (0.XX)
-```
-
-## Sharing
-
-After export:
-- Share JSON file directly
-- Upload to team repository
-- Publish to instinct registry
-
----
-
-**TIP**: Export high-confidence instincts (>0.8) for better quality shares.