docs: fix stale metrics and inconsistencies across documentation files

- Remove duplicate npm test command in CONTRIBUTING.md setup section
- Update PLUGIN_STANDARDS.md phase completion metrics to reflect current
  plugin counts (5,046 plugins, 72 char avg description, 807 short remaining)
- Fix package.json description count from 4,000+ to 5,000+ to match README
- Remove orphaned sentence in docs/plugins-how-to.md between sections

These changes fix documentation that contains outdated numbers, duplicated
instructions, and inconsistent tool counts that could confuse contributors.

Author: SuperCLI Dev

CONTRIBUTING.md

@@ -38,10 +38,6 @@ npm install
 # Copy environment configuration
 cp .env.example .env
 
-# Run tests to verify setup
-npm test
-
-# Note: lint and typecheck commands are not configured in this project
 # Run tests to verify setup
 npm test
 ```

PLUGIN_STANDARDS.md

@@ -137,14 +137,14 @@ Before submitting a new plugin, ensure:
 ## Phase Completion
 
 **Phase 1 (Metadata):** ✓ Complete
-- All 1,179 plugins have proper source URLs
+- All plugins have proper source URLs
 
 **Phase 2 (Descriptions):** ✓ Complete
-- All 105 short descriptions enhanced
-- Avg description: 90 characters
-- Quality score: 100%
+- Short descriptions enhanced
+- Avg description: 72 characters (target: 80+)
+- ~807 remaining short descriptions (<30 chars)
 
-**Phase 3 (Automation):** → Next
+**Phase 3 (Automation):** → In Progress
 - CI/CD pipeline for quality enforcement
 - Community contribution guidelines
 - Automated validation on pull requests

docs/plugins-how-to.md

@@ -93,8 +93,6 @@ supercli plugins doctor my-plugin
 
 ---
 
-Learn how to create plugin harnesses that turn any CLI into a supercli harness.
-
 ## What is a Plugin Harness?
 
 A **plugin harness** bridges supercli to an external CLI tool. It allows supercli to:

package.json

@@ -1,7 +1,7 @@
 {
   "name": "superacli",
   "version": "1.31.4",
-  "description": "4,000+ tools. One CLI. Zero configuration.",
+  "description": "5,000+ tools. One CLI. Zero configuration.",
   "license": "MIT",
   "main": "server/app.js",
   "bin": {