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.

.cursor/commands/instinct-export.md

@@ -1,91 +0,0 @@
----
-name: instinct-export
-description: Export instincts for sharing with teammates or other projects
-command: /instinct-export
----
-
-# Instinct Export Command
-
-Exports instincts to a shareable format. Perfect for:
-- Sharing with teammates
-- Transferring to a new machine
-- Contributing to project conventions
-
-## Usage
-
-```
-/instinct-export                           # Export all personal instincts
-/instinct-export --domain testing          # Export only testing instincts
-/instinct-export --min-confidence 0.7      # Only export high-confidence instincts
-/instinct-export --output team-instincts.yaml
-```
-
-## What to Do
-
-1. Read instincts from `~/.claude/homunculus/instincts/personal/`
-2. Filter based on flags
-3. Strip sensitive information:
-   - Remove session IDs
-   - Remove file paths (keep only patterns)
-   - Remove timestamps older than "last week"
-4. Generate export file
-
-## Output Format
-
-Creates a YAML file:
-
-```yaml
-# Instincts Export
-# Generated: 2025-01-22
-# Source: personal
-# Count: 12 instincts
-
-version: "2.0"
-exported_by: "continuous-learning-v2"
-export_date: "2025-01-22T10:30:00Z"
-
-instincts:
-  - id: prefer-functional-style
-    trigger: "when writing new functions"
-    action: "Use functional patterns over classes"
-    confidence: 0.8
-    domain: code-style
-    observations: 8
-
-  - id: test-first-workflow
-    trigger: "when adding new functionality"
-    action: "Write test first, then implementation"
-    confidence: 0.9
-    domain: testing
-    observations: 12
-
-  - id: grep-before-edit
-    trigger: "when modifying code"
-    action: "Search with Grep, confirm with Read, then Edit"
-    confidence: 0.7
-    domain: workflow
-    observations: 6
-```
-
-## Privacy Considerations
-
-Exports include:
-- ✅ Trigger patterns
-- ✅ Actions
-- ✅ Confidence scores
-- ✅ Domains
-- ✅ Observation counts
-
-Exports do NOT include:
-- ❌ Actual code snippets
-- ❌ File paths
-- ❌ Session transcripts
-- ❌ Personal identifiers
-
-## Flags
-
-- `--domain <name>`: Export only specified domain
-- `--min-confidence <n>`: Minimum confidence threshold (default: 0.3)
-- `--output <file>`: Output file path (default: instincts-export-YYYYMMDD.yaml)
-- `--format <yaml|json|md>`: Output format (default: yaml)
-- `--include-evidence`: Include evidence text (default: excluded)