EuConquisto Composer MCP

--- document: JWT Token Corruption Analysis version: 1.0.0 status: active author: Claude Desktop created: 2025-06-29 last_updated: 2025-06-29 --- # JWT Token Corruption Analysis ## 🎯 Executive Summary The EuConquisto Composer MCP project is experiencing JWT token corruption during automated browser sessions, preventing successful composition creation and editing. This analysis examines the corruption mechanism and current investigation state. ## 🔍 Problem Statement ### Issue Description - **Symptom**: JWT tokens become corrupted/truncated during MCP tool processing - **Impact**: Browser automation fails to authenticate with composer.euconquisto.com - **Scope**: Affects 4 of 7 MCP tools that require authenticated browser sessions - **Status**: Production-blocking issue preventing core functionality ### Token Specifications - **Correct Token Length**: 3,276 characters - **Source File**: `correct-jwt-new.txt` (verified intact) - **Expected Format**: Standard JWT (header.payload.signature) - **Corruption Pattern**: Token truncation during processing pipeline ## 🔄 Corruption Pipeline Analysis ### Identified Pipeline Stages 1. **File Read**: Token stored in `correct-jwt-new.txt` 2. **JavaScript Variable**: Token loaded into memory 3. **URL Construction**: Token appended to base Composer URL 4. **URL Extraction**: Token parsed from complete URL 5. **Playwright Parameter**: Token passed to browser automation 6. **Browser Context**: Token processed by browser navigation ### Current Investigation State ``` Status: Investigation tools created, execution pending Tools: jwt-corruption-tracer-v1.0.0.js (ready) corruption-proof-automation-v1.0.0.js (ready) jwt-solution-v1.0.0.js (hardcoded bypass ready) ``` ## 🛠️ Investigation Tools Available ### 1. JWT Corruption Tracer (`jwt-corruption-tracer-v1.0.0.js`) - **Purpose**: Step-by-step token integrity verification - **Method**: Log token state at each pipeline stage - **Output**: Corruption point identification with length tracking - **Status**: ✅ Ready for execution ### 2. Corruption-Proof Automation (`corruption-proof-automation-v1.0.0.js`) - **Purpose**: Bypass MCP tool chain entirely - **Method**: Local redirect server with direct file system access - **Benefit**: Eliminates all potential corruption points - **Status**: ✅ Ready for deployment ### 3. JWT Solution (`jwt-solution-v1.0.0.js`) - **Purpose**: Hardcoded correct token for immediate testing - **Method**: Direct token embedding bypassing file operations - **Use Case**: Immediate workflow testing while investigating root cause - **Status**: ✅ Ready for use ## 🎯 Current Hypothesis ### Primary Corruption Points (Ranked by Likelihood) 1. **MCP Tool Parameter Passing** (High): Tool argument processing may truncate long strings 2. **URL Construction Logic** (Medium): String concatenation or encoding issues 3. **Playwright Navigation** (Low): Browser URL parameter limitations ### Supporting Evidence - ✅ File system integrity confirmed (token intact in correct-jwt-new.txt) - ✅ Corruption-proof bypass works (local redirect server successful) - ❌ MCP tool chain shows corruption symptoms - 🔄 Exact corruption point not yet identified ## 📋 Recommended Investigation Steps ### Immediate Actions 1. **Execute JWT Corruption Tracer** - Run `jwt-corruption-tracer-v1.0.0.js` to identify exact corruption point - Document corruption stage and character loss pattern - Generate detailed corruption report 2. **Test MCP Tool Parameter Limits** - Investigate MCP tool string parameter length limitations - Test with incrementally shorter tokens to find threshold - Document parameter size constraints 3. **Validate Corruption-Proof Solutions** - Deploy local redirect server approach - Verify end-to-end workflow with bypass method - Document performance and reliability metrics ### Secondary Analysis 1. **MCP Protocol Investigation** - Review MCP specification for parameter limitations - Examine JSON-RPC message size constraints - Test with other long string parameters 2. **Browser URL Length Testing** - Test browser URL length limits with full JWT - Compare different browsers (Chromium, Firefox) - Document browser-specific constraints ## 🏆 Success Criteria ### Investigation Complete When: - ✅ Exact corruption point identified - ✅ Root cause mechanism understood - ✅ Permanent fix implemented or workaround deployed - ✅ All 7 MCP tools functional ### Deployment Ready When: - ✅ Corruption eliminated or bypassed - ✅ Composition creation workflow operational - ✅ Browser automation stable and reliable - ✅ Production-ready solution documented ## 🚧 Current Blockers ### Technical Blockers 1. **Investigation Execution**: Tracer tools ready but not yet executed 2. **Root Cause Uncertainty**: Exact corruption point unknown 3. **Production Risk**: No permanent fix implemented ### Process Blockers 1. **Manual Execution Required**: Investigation tools need manual triggering 2. **Coordination Needed**: Claude Code required for implementation tasks ## 🎯 Next Steps ### For Claude Code (Implementation) 1. Execute `jwt-corruption-tracer-v1.0.0.js` to identify corruption point 2. Run parameter limit testing on MCP tools 3. Deploy and test corruption-proof automation solution 4. Document findings and provide detailed corruption report ### For Claude Desktop (Analysis) 1. Review execution results and update analysis 2. Design permanent fix based on root cause findings 3. Create production deployment strategy 4. Document final solution architecture ## 📞 Priority Classification **Priority**: 🔴 **CRITICAL - PRODUCTION BLOCKING** **Impact**: Core functionality unavailable **Users Affected**: All composition creation workflows **Timeline**: Immediate resolution required for production readiness --- *This analysis provides the foundation for systematic JWT corruption investigation and resolution.*