feat: consolidate all Anthropic plugins into ECC v2.0.0

Ports functionality from 10+ separate plugins into ECC so users only
need one plugin installed. Consolidates: pr-review-toolkit, feature-dev,
commit-commands, hookify, code-simplifier, security-guidance,
frontend-design, explanatory-output-style, and personal skills.

New agents (8): code-architect, code-explorer, code-simplifier,
comment-analyzer, conversation-analyzer, pr-test-analyzer,
silent-failure-hunter, type-design-analyzer

New commands (9): commit, commit-push-pr, clean-gone, review-pr,
feature-dev, hookify, hookify-list, hookify-configure, hookify-help

New skills (8): frontend-design, hookify-rules, github-ops,
knowledge-ops, lead-intelligence, oura-health, pmx-guidelines, remotion

Enhanced skills (8): article-writing, content-engine, market-research,
investor-materials, investor-outreach, x-api, security-scan,
autonomous-loops — merged with personal skill content

New hook: security-reminder.py (pattern-based OWASP vulnerability
warnings on file edits)

Totals: 36 agents, 69 commands, 128 skills, 29 hook scripts

skills/x-api/SKILL.md

@@ -202,7 +202,68 @@ Use `content-engine` skill to generate platform-native content, then post via X
 3. Post via X API using patterns above
 4. Track engagement via public_metrics
 
+## Account Management Operations
+
+Beyond posting, the X API supports account management workflows:
+
+### Check Mentions and Replies
+```python
+# Get mentions for authenticated user
+resp = requests.get(
+    f"https://api.x.com/2/users/{user_id}/mentions",
+    headers=headers,
+    params={
+        "max_results": 10,
+        "tweet.fields": "created_at,public_metrics,in_reply_to_user_id",
+    }
+)
+```
+
+### Track Engagement Metrics
+```python
+# Get tweet metrics
+resp = requests.get(
+    f"https://api.x.com/2/tweets/{tweet_id}",
+    headers=headers,
+    params={"tweet.fields": "public_metrics"}
+)
+metrics = resp.json()["data"]["public_metrics"]
+# Returns: retweet_count, reply_count, like_count, quote_count, impression_count
+```
+
+### Follower/Following Graph Analysis
+```python
+# Get followers
+resp = requests.get(
+    f"https://api.x.com/2/users/{user_id}/followers",
+    headers=headers,
+    params={"max_results": 100, "user.fields": "public_metrics,description"}
+)
+
+# Get following
+resp = requests.get(
+    f"https://api.x.com/2/users/{user_id}/following",
+    headers=headers,
+    params={"max_results": 100, "user.fields": "public_metrics,description"}
+)
+```
+
+## Content Guidelines for X
+
+When posting programmatically, follow these platform norms:
+- Lowercase sentence starts for dev/tech X accounts
+- Proper nouns and acronyms stay capitalized
+- No hashtags (they signal inauthenticity on dev X)
+- No links in tweet body (kills reach). Links in first reply.
+- Hook in first 7 words (mobile fold is brutal)
+- Character limit: 280 chars for free, 25K for Premium
+
+## Safety
+
+Always get user approval before posting. Draft the content and present it for review. Never auto-post without explicit confirmation.
+
 ## Related Skills
 
 - `content-engine` — Generate platform-native content for X
 - `crosspost` — Distribute content across X, LinkedIn, and other platforms
+- `lead-intelligence` — Use X follower graph for warm path discovery