directory to .npmignore to exclude internal documentation from npm package

- Updated license URL to reference GPL-3.0 instead of MIT license

Author: github-actions[bot]

.npmignore

@@ -31,6 +31,9 @@ PR_DESCRIPTION.md
 TECHNICAL_DEBT_CHECKLIST.md
 TEST_STABILIZATION_REPORT*.md
 
+# Internal documentation (now in docs/internal/)
+docs/internal/
+
 # Root-level test scripts
 test-*.js
 debug-*.js

docs/internal/CLAUDE.md

@@ -855,8 +855,8 @@ info:
     url: https://github.com/DevilsDev/rag-pipeline-utils
     email: support@devilsdev.com
   license:
-    name: MIT
-    url: https://opensource.org/licenses/MIT
+    name: GPL-3.0
+    url: https://opensource.org/licenses/GPL-3.0
 
 paths:
   /dag/execute:

docs/internal/README.md

@@ -0,0 +1,57 @@
+# Internal Documentation
+
+This directory contains internal project documentation used during development, planning, and release processes. These files are **not published** to npm.
+
+## Contents
+
+### Planning & Strategy
+
+- **BRANCHING_STRATEGY.md** - Git branching workflow and merge policies
+- **PROPOSED_CHANGES.md** - Planned features and architectural changes
+- **Use-Cases.md** - Internal use case analysis
+
+### Development Guidelines
+
+- **CLAUDE.md** - AI assistant instructions and project rules
+- **CONTRIBUTING.md** - Internal contribution guidelines (different from public docs)
+- **PLUGIN_ECOSYSTEM_GUIDE.md** - Plugin development detailed guide
+
+### Release Documentation
+
+- **RELEASE_ENGINEERING_REPORT.md** - Release process and automation
+- **RELEASE_NOTES_ESM_FIX.md** - ESM compatibility release notes
+- **RELEASE_NOTES_v3.md** - Version 3.0 release notes
+- **CHANGELOG.md** - Detailed change history
+
+### Deployment & Operations
+
+- **DEPLOYMENT_GUIDE.md** - Internal deployment procedures
+- **DEPLOYMENT_SUMMARY_v2.2.0.md** - Version 2.2.0 deployment summary
+
+### Quality & Security
+
+- **PRODUCTION_READINESS_CERTIFICATION.md** - Production readiness checklist
+- **SECURITY_VULNERABILITY_TABLE.md** - Security assessment and remediation
+- **LESSONS_LEARNED_AND_BEST_PRACTICES.md** - Post-mortems and learnings
+
+### Project Reviews
+
+- **FINAL_PRE_MERGE_REVIEW.md** - Pre-merge quality gate checklist
+- **PROJECT_COMPLETION_SUMMARY.md** - Project milestone summaries
+
+### Temporary/Test Files
+
+- **test-change.md** - Temporary test file (should be removed)
+
+## For Contributors
+
+These documents are maintained for internal reference and are subject to change without notice. For public-facing documentation, see:
+
+- **README.md** (root) - User-facing documentation
+- **docs/** - Published documentation
+
+## Notes
+
+- These files are excluded from npm packages via `.npmignore`
+- Sensitive information should never be committed here
+- Keep documentation up-to-date with code changes