/ MIGRATION_PLAN.md
MIGRATION_PLAN.md
1 # Chainlit & LangGraph Upgrade Migration Plan 2 3 **Project:** chainlit_langgraph 4 **Current Version:** 0.3.1 5 **Target Version:** 0.4.0 6 **Date Created:** 2025-10-27 7 **Prepared By:** Claude Code 8 9 --- 10 11 ## Executive Summary 12 13 ### Version Upgrades 14 15 | Package | Current | Target | Impact | 16 |---------|---------|--------|--------| 17 | **Chainlit** | 1.3.1 | 2.8.3 | 🔴 HIGH - Major breaking changes | 18 | **LangGraph** | 0.2.45 | 1.0.1 | 🟢 LOW - Backward compatible | 19 | **LangChain** | 0.3.7 | 0.3.x | 🟢 LOW - Keep current | 20 | **Python** | 3.10 | 3.10+ | ✅ Compatible | 21 22 ### Key Metrics 23 24 - **Estimated Effort:** 3-5 days (26-33 hours) 25 - **Risk Level:** Medium-High 26 - **Code Changes Required:** Minimal (mostly configuration) 27 - **Data Migration Required:** No (schema compatible) 28 - **Rollback Difficulty:** Low (git revert + backup restore) 29 30 ### Critical Success Factors 31 32 1. ✅ Configuration file cleanup (`.chainlit/config.toml`) 33 2. ✅ Comprehensive testing of all 5 workflows 34 3. ✅ Database backup before upgrade 35 4. ✅ Authentication flow validation 36 5. ✅ State persistence verification 37 38 --- 39 40 ## Current System Analysis 41 42 ### Architecture Overview 43 44 ``` 45 ┌─────────────────────────────────────────────────────────────┐ 46 │ Chainlit Application │ 47 │ ┌─────────────┐ ┌──────────────┐ ┌──────────────────┐ │ 48 │ │ Auth │ │ Workflows │ │ LLM Factory │ │ 49 │ │ (Password/ │ │ (5 custom) │ │ (6 providers) │ │ 50 │ │ OAuth) │ └──────────────┘ └──────────────────┘ │ 51 │ └─────────────┘ │ 52 │ │ │ │ │ 53 │ └────────────────────┴────────────────────┘ │ 54 │ │ │ 55 │ LangGraph Engine │ 56 │ (StateGraph + Tools) │ 57 └─────────────────────────────────────────────────────────────┘ 58 │ 59 ┌─────────────────────┼─────────────────────┐ 60 │ │ │ 61 ┌─────▼──────┐ ┌─────▼──────┐ ┌──────▼──────┐ 62 │ PostgreSQL │ │ MinIO │ │ LLM APIs │ 63 │ (State & │ │ (Files) │ │ (Multiple) │ 64 │ Threads) │ └────────────┘ └─────────────┘ 65 └────────────┘ 66 ``` 67 68 ### Dependency Tree 69 70 ``` 71 chainlit-langgraph (0.3.1) 72 ├── chainlit==1.3.1 ❌ NEEDS UPGRADE 73 │ ├── sqlalchemy==2.0.36 ✅ 74 │ └── asyncpg==0.29.0 ✅ 75 ├── langgraph==0.2.45 ⚠️ NEEDS UPGRADE 76 │ ├── langgraph-checkpoint==2.0.2 ✅ 77 │ └── langchain-core==0.3.15 ✅ 78 ├── langchain==0.3.7 ✅ 79 ├── langchain-anthropic==0.2.4 ⚠️ MINOR UPDATE 80 ├── langchain-openai==0.2.5 ⚠️ MINOR UPDATE 81 ├── langchain-google-genai==2.0.4 ✅ 82 ├── langchain-google-vertexai==2.0.7 ✅ 83 ├── langchain-groq==0.2.1 ✅ 84 ├── langchain-ollama==0.2.0 ✅ 85 ├── boto3==1.35.41 ✅ 86 ├── alembic==1.13.3 ✅ 87 ├── psycopg2-binary==2.9.9 ✅ 88 └── pypdf==5.0.1 ✅ 89 ``` 90 91 ### Critical Usage Patterns 92 93 **Chainlit Decorators (app.py):** 94 - `@cl.on_chat_start` (Line 164) - Workflow initialization 95 - `@cl.on_message` (Line 197) - Message handling with streaming 96 - `@cl.on_chat_end` (Line 52) - State persistence 97 - `@cl.on_chat_resume` (Line 86) - Session restoration 98 - `@cl.on_settings_update` (Line 183) - Settings management 99 - `@cl.set_chat_profiles` (Line 155) - Workflow selection 100 - `@cl.password_auth_callback` (Line 143) - Authentication 101 - `@maybe_oauth_callback` (Line 132) - OAuth integration 102 103 **LangGraph Patterns (chat_workflow/workflows/):** 104 - `StateGraph` with custom state classes 105 - `graph.compile()` for runnable creation 106 - `graph.astream_events(state, version="v1")` for streaming 107 - Custom node implementations with tool routing 108 - Message history management with `operator.add` 109 110 **Custom Integrations:** 111 - Multi-provider LLM factory (6 providers) 112 - Dynamic workflow discovery system 113 - State serialization for LangChain messages 114 - MinIO S3-compatible storage 115 - SQLAlchemy data layer with custom tables 116 117 --- 118 119 ## Breaking Changes Analysis 120 121 ### Chainlit 1.3.1 → 2.8.3 122 123 #### 🔴 CRITICAL: Configuration File Changes 124 125 **Location:** `.chainlit/config.toml` 126 127 **Changes Required:** 128 129 1. **Remove deprecated fields:** 130 ```toml 131 # ❌ DELETE THESE LINES 132 follow_symlink = false # Line 19 (commented) 133 custom_font = "..." # Line 80 (commented) 134 ``` 135 136 2. **Remove `[features.audio]` section (Lines 41-53):** 137 ```toml 138 # ❌ DELETE THIS ENTIRE SECTION 139 [features.audio] 140 min_decibels = -45 141 initial_silence_timeout = 3000 142 silence_timeout = 1500 143 max_duration = 15000 144 chunk_duration = 1000 145 sample_rate = 44100 146 ``` 147 **Reason:** Audio API completely reworked. Use new callbacks if needed: 148 - `@cl.on_audio_start` 149 - `@cl.on_audio_chunk` 150 - `@cl.on_audio_end` 151 152 3. **Remove `[UI.theme]` section (Lines 90-119):** 153 ```toml 154 # ❌ DELETE THIS ENTIRE SECTION 155 [UI.theme] 156 default = "dark" 157 [UI.theme.light] 158 ... 159 [UI.theme.dark] 160 ... 161 ``` 162 **Reason:** Theme customization moved to separate `theme.json` file. 163 164 4. **Update metadata:** 165 ```toml 166 [meta] 167 generated_by = "2.8.3" # Change from "1.2.0" 168 ``` 169 170 **Impact Assessment:** 171 - **Risk:** High (app may fail to start) 172 - **Effort:** 30 minutes 173 - **Testing:** Immediate validation required 174 - **Rollback:** Restore from `.chainlit/config.toml.backup` 175 176 #### 🟠 HIGH: Authentication Changes 177 178 **What Changed:** 179 - Backend now uses **cookie-based authentication** instead of direct JWT 180 - More secure (httpOnly cookies, CSRF protection) 181 - No code changes required for basic password auth 182 183 **Your Code Status:** 184 ```python 185 # app.py:143-152 - Password Auth 186 @cl.password_auth_callback 187 def auth_callback(username: str, password: str): 188 # ✅ This will work as-is 189 return cl.User(...) 190 191 # app.py:132-140 - OAuth 192 @maybe_oauth_callback 193 def oauth_callback(provider_id, token, raw_user_data, default_user): 194 # ✅ This will work as-is 195 return default_user 196 ``` 197 198 **Testing Required:** 199 - [ ] Login with password (admin/admin) 200 - [ ] OAuth flow (if configured) 201 - [ ] Session persistence across page reloads 202 - [ ] Logout functionality 203 - [ ] Cookie security headers present 204 205 #### 🟠 MEDIUM: Actions API Changes 206 207 **Only applies if using `cl.Action`** 208 209 **Status:** ✅ **NOT USED** in your codebase 210 211 **Reference for future:** 212 ```python 213 # OLD (1.3.1): 214 cl.Action(name="...", value="string", description="...") 215 216 # NEW (2.8.3): 217 cl.Action( 218 name="...", 219 payload={"key": "value"}, # Now accepts dict 220 tooltip="...", # Renamed from description 221 icon="MessageSquare" # NEW: Lucide icons 222 ) 223 ``` 224 225 #### 🟡 MEDIUM: Session Object Changes 226 227 **What Changed:** 228 ```python 229 # OLD (1.3.1): 230 cl.context.session.http_referer # ❌ Removed 231 cl.context.session.http_cookie # ❌ Removed 232 cl.context.session.languages # ❌ Removed 233 234 # NEW (2.8.3): 235 cl.context.session.environ # ✅ Contains all HTTP headers 236 ``` 237 238 **Your Code Status:** 239 ```python 240 # app.py:59, 166, 173, 179 241 thread_id = cl.context.session.thread_id # ✅ Still works 242 chat_profile = cl.context.session.chat_profile # ✅ Still works 243 ``` 244 245 **Impact:** ✅ **NONE** - You only access `thread_id` and `chat_profile` 246 247 #### 🟡 LOW: UI Rewrite (Shadcn/Tailwind) 248 249 **What Changed:** 250 - Complete frontend rewrite with Shadcn/Tailwind 251 - New custom element feature 252 - Better theme customization 253 - Cleaner codebase 254 255 **Impact on Your App:** 256 - Visual appearance may have minor differences 257 - Custom CSS may need adjustments (if used) 258 - Better performance and UX 259 260 **Testing Required:** 261 - [ ] All UI elements render correctly 262 - [ ] Chat input/output working 263 - [ ] File upload UI functional 264 - [ ] Settings panel displays properly 265 - [ ] Dark/light theme switching 266 - [ ] Mobile responsiveness 267 268 #### 🟢 LOW: Security Updates 269 270 **Required Updates:** 271 - FastAPI >= 0.115.3 (CVE-2024-47874 fix) 272 - Starlette >= 0.41.2 273 - Python 3.8 support dropped (you're on 3.10 ✅) 274 275 **Impact:** Automatic via dependency resolution 276 277 --- 278 279 ### LangGraph 0.2.45 → 1.0.1 280 281 #### ✅ EXCELLENT NEWS: Backward Compatible! 282 283 **Official Statement:** 284 > "LangGraph 1.0 maintains full backward compatibility with 0.6.6+. No breaking changes until 2.0." 285 286 **Your Code Status:** 287 288 ```python 289 # chat_workflow/workflows/base.py 290 from langgraph.graph import StateGraph, END # ✅ Still works 291 292 class BaseState(TypedDict): 293 messages: Annotated[Sequence[AnyMessage], operator.add] # ✅ Still works 294 chat_profile: str 295 296 class BaseWorkflow(ABC): 297 def create_graph(self) -> StateGraph: # ✅ Still works 298 graph = StateGraph(MyState) 299 graph.add_node("chat", self.chat_node) 300 graph.add_edge("chat", END) 301 return graph 302 303 # app.py:213 304 graph.astream_events(state, version="v1", stream_mode="values") # ✅ Still works 305 ``` 306 307 **Impact:** ✅ **ZERO CODE CHANGES REQUIRED** 308 309 #### ⚠️ DEPRECATED: langgraph.prebuilt 310 311 **What Changed:** 312 ```python 313 # ❌ DEPRECATED (still works but will be removed in 2.0): 314 from langgraph.prebuilt import create_react_agent 315 316 # ✅ NEW LOCATION: 317 from langchain.agents import create_react_agent 318 ``` 319 320 **Your Code Status:** 321 ```bash 322 $ grep -r "langgraph.prebuilt" chat_workflow/ 323 # No matches found ✅ 324 ``` 325 326 **Impact:** ✅ **NONE** - You don't use prebuilt agents 327 328 #### 🆕 NEW FEATURES (Optional) 329 330 **Available in LangGraph 1.0:** 331 332 1. **Node Caching** - Skip redundant computations 333 ```python 334 graph.add_node("expensive_node", compute_heavy_fn, cache=True) 335 ``` 336 337 2. **Deferred Nodes** - Delay execution until all upstream paths complete 338 ```python 339 graph.add_node("summarize", summarize_fn, deferred=True) 340 ``` 341 342 3. **Command API** - Dynamic, edgeless agent flows 343 ```python 344 from langgraph.types import Command 345 # More flexible than traditional edges 346 ``` 347 348 4. **Tool State Updates** - Tools can directly modify graph state 349 ```python 350 def tool_with_state_update(state): 351 # Tool can return state modifications 352 return {"result": "...", "state_update": {...}} 353 ``` 354 355 5. **Supervisor Library** - Hierarchical multi-agent systems 356 ```python 357 from langgraph.supervisor import create_supervisor 358 ``` 359 360 **Recommendation:** Explore these features in Phase 8 (post-upgrade optimization) 361 362 --- 363 364 ## Phase-by-Phase Execution Plan 365 366 ### PHASE 0: Preparation & Backup 367 **Duration:** 2-3 hours 368 **Risk:** Low 369 **Blocking:** None 370 371 #### Checklist 372 373 - [ ] **0.1 Verify Current State** 374 ```bash 375 cd /home/user/chainlit_langgraph 376 git status 377 git log --oneline -5 378 docker ps 379 ``` 380 381 - [ ] **0.2 Export Dependencies** 382 ```bash 383 poetry export -f requirements.txt -o requirements-backup-v0.3.1.txt --without-hashes 384 poetry show > poetry-show-backup-v0.3.1.txt 385 ``` 386 387 - [ ] **0.3 Backup Configuration** 388 ```bash 389 cp .chainlit/config.toml .chainlit/config.toml.backup 390 cp pyproject.toml pyproject.toml.backup 391 cp poetry.lock poetry.lock.backup 392 ``` 393 394 - [ ] **0.4 Database Backup** 395 ```bash 396 # Start database if not running 397 docker compose up -d postgres 398 399 # Create backup 400 docker exec postgres pg_dump -U postgres postgres > backup-pre-upgrade-$(date +%Y%m%d).sql 401 402 # Verify backup 403 ls -lh backup-pre-upgrade-*.sql 404 ``` 405 406 - [ ] **0.5 Test Current System** 407 ```bash 408 # Run existing tests 409 poetry run pytest -v 410 411 # Start application 412 docker compose up -d 413 curl http://localhost:8000 414 415 # Take screenshots of UI 416 # Document current behavior 417 ``` 418 419 - [ ] **0.6 Create Rollback Script** 420 ```bash 421 cat > rollback.sh << 'EOF' 422 #!/bin/bash 423 echo "🔄 Rolling back to v0.3.1..." 424 425 # Restore config files 426 cp .chainlit/config.toml.backup .chainlit/config.toml 427 cp pyproject.toml.backup pyproject.toml 428 cp poetry.lock.backup poetry.lock 429 430 # Restore dependencies 431 poetry install 432 433 # Restore database 434 docker exec -i postgres psql -U postgres postgres < backup-pre-upgrade-*.sql 435 436 echo "✅ Rollback complete!" 437 EOF 438 chmod +x rollback.sh 439 ``` 440 441 --- 442 443 ### PHASE 1: Dependency Upgrades 444 **Duration:** 3-4 hours 445 **Risk:** Medium 446 **Blocking:** Phase 0 447 448 #### Step 1.1: Update LangGraph (Lower Risk First) 449 450 - [ ] **Update pyproject.toml:** 451 ```toml 452 [tool.poetry.dependencies] 453 langgraph = "^1.0.1" # Was: "^0.2.31" 454 ``` 455 456 - [ ] **Lock and install:** 457 ```bash 458 poetry lock --no-update 459 poetry install 460 ``` 461 462 - [ ] **Verify installation:** 463 ```bash 464 poetry show langgraph 465 # Should show 1.0.1 466 ``` 467 468 - [ ] **Test import:** 469 ```bash 470 poetry run python -c " 471 from langgraph.graph import StateGraph, END 472 from langgraph import __version__ 473 print(f'✅ LangGraph {__version__} imported successfully') 474 " 475 ``` 476 477 - [ ] **Test workflow compilation:** 478 ```bash 479 poetry run python -c " 480 from chat_workflow.workflows.simple_chat import SimpleChatWorkflow 481 workflow = SimpleChatWorkflow() 482 graph = workflow.create_graph() 483 compiled = graph.compile() 484 print('✅ Graph compiles successfully') 485 " 486 ``` 487 488 - [ ] **Run tests:** 489 ```bash 490 poetry run pytest chat_workflow/tests/test_simple_chat.py -v 491 ``` 492 493 **Expected Result:** ✅ All tests pass (backward compatible) 494 495 #### Step 1.2: Update Chainlit (Higher Risk) 496 497 - [ ] **Update pyproject.toml:** 498 ```toml 499 [tool.poetry.dependencies] 500 chainlit = "^2.8.3" # Was: "1.3.1" 501 ``` 502 503 - [ ] **Lock and install:** 504 ```bash 505 poetry lock 506 poetry install 507 ``` 508 509 - [ ] **Verify installation:** 510 ```bash 511 poetry show chainlit 512 # Should show 2.8.3 513 ``` 514 515 - [ ] **Test import:** 516 ```bash 517 poetry run python -c " 518 import chainlit as cl 519 from chainlit import __version__ 520 print(f'✅ Chainlit {__version__} imported successfully') 521 " 522 ``` 523 524 **Expected Result:** ✅ May show deprecation warnings about config (normal) 525 526 #### Step 1.3: Update LangChain Packages 527 528 - [ ] **Update pyproject.toml:** 529 ```toml 530 [tool.poetry.dependencies] 531 langchain-openai = "^0.3.0" # Was: "^0.2.1" 532 langchain-anthropic = "^0.3.0" # Was: "^0.2.1" 533 # Others remain the same 534 ``` 535 536 - [ ] **Lock and install:** 537 ```bash 538 poetry lock 539 poetry install 540 ``` 541 542 - [ ] **Test LLM factory:** 543 ```bash 544 poetry run python -c " 545 from chat_workflow.llm.factory import llm_factory 546 from chat_workflow.llm.providers.openai import OpenAIProvider 547 print('✅ LLM providers loaded successfully') 548 print(f'Registered providers: {list(llm_factory._providers.keys())}') 549 " 550 ``` 551 552 #### Step 1.4: Verify All Dependencies 553 554 - [ ] **Check dependency tree:** 555 ```bash 556 poetry show --tree | grep -E "(chainlit|langgraph|langchain)" 557 ``` 558 559 - [ ] **Check for conflicts:** 560 ```bash 561 poetry check 562 ``` 563 564 - [ ] **Export new lockfile:** 565 ```bash 566 poetry export -f requirements.txt -o requirements-upgraded-v0.4.0.txt --without-hashes 567 ``` 568 569 --- 570 571 ### PHASE 2: Configuration Migration 572 **Duration:** 2-3 hours 573 **Risk:** High 574 **Blocking:** Phase 1 575 576 #### Step 2.1: Update .chainlit/config.toml 577 578 - [ ] **Create backup:** 579 ```bash 580 cp .chainlit/config.toml .chainlit/config.toml.pre-migration 581 ``` 582 583 - [ ] **Remove deprecated lines:** 584 ```bash 585 # Edit .chainlit/config.toml 586 # Delete or ensure commented out: 587 # - Line 19: follow_symlink 588 # - Line 80: custom_font 589 # - Lines 41-53: [features.audio] section 590 # - Lines 90-119: [UI.theme] section 591 ``` 592 593 - [ ] **Update [UI] section to keep only:** 594 ```toml 595 [UI] 596 name = "Assistant" 597 default_collapse_content = true 598 cot = "full" 599 ``` 600 601 - [ ] **Update [meta] section:** 602 ```toml 603 [meta] 604 generated_by = "2.8.3" 605 ``` 606 607 - [ ] **Verify final config:** 608 ```bash 609 cat .chainlit/config.toml | grep -E "^\[|^[a-z]" | head -20 610 ``` 611 612 **Expected sections remaining:** 613 - `[project]` 614 - `[features]` 615 - `[features.spontaneous_file_upload]` 616 - `[UI]` 617 - `[meta]` 618 619 #### Step 2.2: Create Theme File (Optional) 620 621 If you want custom theming: 622 623 - [ ] **Create .chainlit/theme.json:** 624 ```bash 625 cat > .chainlit/theme.json << 'EOF' 626 { 627 "default": "dark", 628 "light": { 629 "primary": { 630 "main": "#F80061", 631 "dark": "#980039", 632 "light": "#FFE7EB" 633 }, 634 "text": { 635 "primary": "#212121", 636 "secondary": "#616161" 637 }, 638 "background": "#FAFAFA", 639 "paper": "#FFFFFF" 640 }, 641 "dark": { 642 "primary": { 643 "main": "#F80061", 644 "dark": "#980039", 645 "light": "#FFE7EB" 646 }, 647 "text": { 648 "primary": "#EEEEEE", 649 "secondary": "#BDBDBD" 650 }, 651 "background": "#121212", 652 "paper": "#1E1E1E" 653 } 654 } 655 EOF 656 ``` 657 658 - [ ] **Verify JSON syntax:** 659 ```bash 660 python -m json.tool .chainlit/theme.json > /dev/null && echo "✅ Valid JSON" 661 ``` 662 663 #### Step 2.3: Test Configuration 664 665 - [ ] **Start application:** 666 ```bash 667 poetry run chainlit run app.py --port 8001 668 ``` 669 670 - [ ] **Check for config errors:** 671 ```bash 672 # Look for startup errors 673 # Should see: "Chainlit is running at http://localhost:8001" 674 # Should NOT see: "Unknown config field" or "Invalid config" 675 ``` 676 677 - [ ] **Test in browser:** 678 ``` 679 Open http://localhost:8001 680 Check console for errors 681 Verify theme loads correctly 682 ``` 683 684 --- 685 686 ### PHASE 3: Code Migration 687 **Duration:** 4-6 hours 688 **Risk:** Medium 689 **Blocking:** Phase 1 690 691 #### Step 3.1: Verify Imports 692 693 - [ ] **Check for langgraph.prebuilt usage:** 694 ```bash 695 grep -r "from langgraph.prebuilt" chat_workflow/ 696 grep -r "import langgraph.prebuilt" chat_workflow/ 697 grep -r "create_react_agent" chat_workflow/ 698 ``` 699 700 **Expected:** No matches found ✅ 701 702 - [ ] **Test all imports:** 703 ```bash 704 poetry run python -c " 705 import app 706 from chat_workflow.workflows.base import BaseWorkflow, BaseState 707 from chat_workflow.workflows.simple_chat import SimpleChatWorkflow 708 from chat_workflow.workflows.multimodal_chat import MultimodalChatWorkflow 709 from chat_workflow.workflows.resume_optimizer import ResumeOptimizerWorkflow 710 from chat_workflow.workflows.lean_canvas_chat import LeanCanvasChatWorkflow 711 print('✅ All imports successful') 712 " 713 ``` 714 715 #### Step 3.2: Validate Storage Client 716 717 - [ ] **Test MinIO storage client:** 718 ```bash 719 poetry run python -c " 720 from chainlit.data.base import BaseStorageClient 721 from chat_workflow.storage_client import MinIOStorageClient 722 print('✅ Storage client inherits from correct base class') 723 " 724 ``` 725 726 - [ ] **Check upload_file signature:** 727 ```bash 728 poetry run python -c " 729 import inspect 730 from chat_workflow.storage_client import MinIOStorageClient 731 sig = inspect.signature(MinIOStorageClient.upload_file) 732 print(f'upload_file signature: {sig}') 733 # Verify parameters match BaseStorageClient interface 734 " 735 ``` 736 737 #### Step 3.3: Validate Session Access 738 739 Your code only accesses: 740 - `cl.context.session.thread_id` ✅ Still available 741 - `cl.context.session.chat_profile` ✅ Still available 742 743 - [ ] **Test session access:** 744 ```python 745 # Add to test file or run manually after startup 746 # Verify these work in @cl.on_chat_start: 747 thread_id = cl.context.session.thread_id 748 chat_profile = cl.context.session.chat_profile 749 ``` 750 751 No changes required ✅ 752 753 #### Step 3.4: Validate Authentication 754 755 - [ ] **Test password auth callback signature:** 756 ```bash 757 poetry run python -c " 758 import inspect 759 from app import auth_callback 760 sig = inspect.signature(auth_callback) 761 print(f'auth_callback signature: {sig}') 762 # Should be: (username: str, password: str) 763 " 764 ``` 765 766 - [ ] **Test OAuth callback signature:** 767 ```bash 768 poetry run python -c " 769 import inspect 770 from app import oauth_callback 771 sig = inspect.signature(oauth_callback) 772 print(f'oauth_callback signature: {sig}') 773 # Should be: (provider_id, token, raw_user_data, default_user) 774 " 775 ``` 776 777 No changes required ✅ 778 779 #### Step 3.5: Validate Workflow Patterns 780 781 - [ ] **Test all workflows compile:** 782 ```bash 783 poetry run python << 'EOF' 784 from chat_workflow.workflows.workflow_factory import WorkflowFactory 785 from chat_workflow.module_discovery import discover_workflows 786 787 discover_workflows() 788 workflows = WorkflowFactory.list_workflows() 789 print(f"Found {len(workflows)} workflows: {workflows}") 790 791 for name in workflows: 792 workflow = WorkflowFactory.create(name) 793 graph = workflow.create_graph() 794 compiled = graph.compile() 795 print(f"✅ {name} compiles successfully") 796 EOF 797 ``` 798 799 --- 800 801 ### PHASE 4: Database Schema Validation 802 **Duration:** 2 hours 803 **Risk:** Medium 804 **Blocking:** Phase 3 805 806 #### Step 4.1: Check Chainlit Schema 807 808 - [ ] **Start database:** 809 ```bash 810 docker compose up -d postgres 811 ``` 812 813 - [ ] **List current tables:** 814 ```bash 815 docker exec postgres psql -U postgres -d postgres -c "\dt" 816 ``` 817 818 **Expected tables:** 819 - `users` 820 - `threads` 821 - `steps` 822 - `elements` 823 - `feedbacks` 824 - `langgraphs` (custom) 825 826 - [ ] **Check Chainlit migrations:** 827 ```bash 828 docker exec postgres psql -U postgres -d postgres -c " 829 SELECT version_num, description 830 FROM alembic_version; 831 " 832 ``` 833 834 #### Step 4.2: Test Alembic Migrations 835 836 - [ ] **Check for new migrations:** 837 ```bash 838 poetry run alembic heads 839 poetry run alembic current 840 ``` 841 842 - [ ] **Generate migration if needed:** 843 ```bash 844 poetry run alembic revision --autogenerate -m "upgrade_chainlit_2_8_3" 845 ``` 846 847 - [ ] **Review generated migration:** 848 ```bash 849 # Check alembic/versions/ for new file 850 # Review SQL statements 851 # Ensure no destructive changes to langgraphs table 852 ``` 853 854 - [ ] **Apply migration (if generated):** 855 ```bash 856 poetry run alembic upgrade head 857 ``` 858 859 #### Step 4.3: Validate Custom Tables 860 861 - [ ] **Check langgraphs table:** 862 ```bash 863 docker exec postgres psql -U postgres -d postgres -c " 864 \d langgraphs 865 " 866 ``` 867 868 **Expected columns:** 869 - `thread_id` (String, PK) 870 - `state` (JSON) 871 - `workflow` (String) 872 873 - [ ] **Test data integrity:** 874 ```bash 875 docker exec postgres psql -U postgres -d postgres -c " 876 SELECT COUNT(*) as total_graphs, 877 COUNT(DISTINCT workflow) as unique_workflows 878 FROM langgraphs; 879 " 880 ``` 881 882 #### Step 4.4: Test State Serialization 883 884 - [ ] **Test serialization roundtrip:** 885 ```bash 886 poetry run python << 'EOF' 887 from chat_workflow.state_serializer import StateSerializer 888 from chat_workflow.workflows.base import BaseState 889 from langchain_core.messages import HumanMessage, AIMessage 890 891 # Create test state 892 test_state = { 893 "messages": [ 894 HumanMessage(content="Hello"), 895 AIMessage(content="Hi there!") 896 ], 897 "chat_profile": "simple_chat" 898 } 899 900 # Serialize 901 serialized = StateSerializer.serialize(test_state) 902 print(f"Serialized: {serialized}") 903 904 # Deserialize 905 deserialized = StateSerializer.deserialize(serialized, BaseState) 906 print(f"Deserialized: {deserialized}") 907 908 # Verify 909 assert len(deserialized["messages"]) == 2 910 assert deserialized["messages"][0].content == "Hello" 911 print("✅ Serialization roundtrip successful") 912 EOF 913 ``` 914 915 --- 916 917 ### PHASE 5: Testing & Validation 918 **Duration:** 8 hours 919 **Risk:** N/A (validation phase) 920 **Blocking:** Phases 1-4 921 922 #### Step 5.1: Unit Tests 923 924 - [ ] **Run full test suite:** 925 ```bash 926 poetry run pytest -v --tb=short 927 ``` 928 929 - [ ] **Test LLM module:** 930 ```bash 931 poetry run pytest chat_workflow/tests/test_llm.py -v 932 ``` 933 934 - [ ] **Test workflows:** 935 ```bash 936 poetry run pytest chat_workflow/tests/test_simple_chat.py -v 937 ``` 938 939 - [ ] **Check test coverage:** 940 ```bash 941 poetry run pytest --cov=chat_workflow --cov-report=html 942 ``` 943 944 #### Step 5.2: Integration Testing - Application Startup 945 946 - [ ] **Test 1: Start services:** 947 ```bash 948 docker compose up -d postgres minio 949 poetry run chainlit run app.py --port 8000 950 ``` 951 952 **Expected output:** 953 ``` 954 Your app is available at http://localhost:8000 955 Chat profiles created: 4 956 ``` 957 958 - [ ] **Test 2: Check logs:** 959 ```bash 960 # No ERROR messages 961 # Look for: "Logging level set to: INFO" 962 # Look for: "Chat profiles created: 4" 963 # Look for: "MinIOStorageClient initialized" 964 ``` 965 966 - [ ] **Test 3: Access UI:** 967 ``` 968 Open http://localhost:8000 969 - Page loads without errors 970 - Login screen appears 971 - No console errors in browser devtools 972 ``` 973 974 #### Step 5.3: Authentication Testing 975 976 - [ ] **Test 4: Password login:** 977 ``` 978 Username: admin 979 Password: admin 980 Expected: ✅ Login successful, redirect to chat 981 ``` 982 983 - [ ] **Test 5: Check session:** 984 ``` 985 - Refresh page → Still logged in 986 - Check browser cookies → chainlit session cookie present 987 - Check cookie attributes → httpOnly, secure (if HTTPS) 988 ``` 989 990 - [ ] **Test 6: Logout (if available):** 991 ``` 992 - Logout → Redirect to login 993 - Try to access chat → Redirect to login 994 ``` 995 996 - [ ] **Test 7: OAuth (if configured):** 997 ``` 998 - Click OAuth provider 999 - Complete OAuth flow 1000 - Return to app logged in 1001 ``` 1002 1003 #### Step 5.4: Workflow Testing 1004 1005 - [ ] **Test 8: Workflow discovery:** 1006 ``` 1007 - Click chat profile selector 1008 - See 4 workflows: 1009 1. Simple Chat 1010 2. Multimodal Chat 1011 3. Resume Optimizer 1012 4. Lean Canvas Chat 1013 ``` 1014 1015 - [ ] **Test 9: Simple Chat workflow:** 1016 ``` 1017 1. Select "Simple Chat" 1018 2. Check settings panel: 1019 - Model selector appears 1020 - Multiple models listed 1021 3. Send message: "What's 2+2?" 1022 4. Expected: 1023 - Message appears in chat 1024 - Streaming response (token by token) 1025 - AI responds with answer 1026 - No errors in logs 1027 ``` 1028 1029 - [ ] **Test 10: Tool calling:** 1030 ``` 1031 1. In Simple Chat, send: "What time is it?" 1032 2. Expected: 1033 - Tool call to datetime tool 1034 - Tool result appears 1035 - AI responds with current time 1036 3. Send: "Search web for latest AI news" 1037 4. Expected (if TAVILY_API_KEY set): 1038 - Tool call to search tool 1039 - Search results appear 1040 - AI summarizes results 1041 ``` 1042 1043 - [ ] **Test 11: Settings update:** 1044 ``` 1045 1. Change model in settings (e.g., GPT-4 → Claude) 1046 2. Send new message 1047 3. Expected: 1048 - New model used for response 1049 - Response style may differ 1050 4. Check logs: 1051 - "Updating state based on new settings" 1052 - "Setting chat_model to [new model]" 1053 ``` 1054 1055 #### Step 5.5: State Persistence Testing 1056 1057 - [ ] **Test 12: Chat state persistence:** 1058 ``` 1059 1. Start new chat 1060 2. Send 3-4 messages 1061 3. Refresh page 1062 4. Expected: 1063 - Chat history restored 1064 - All messages visible 1065 - Can continue conversation 1066 ``` 1067 1068 - [ ] **Test 13: Resume from database:** 1069 ``` 1070 1. Send messages in chat 1071 2. Close browser tab completely 1072 3. Open new tab → http://localhost:8000 1073 4. Navigate to previous thread (if UI allows) 1074 5. Expected: 1075 - Full chat history loaded 1076 - Correct workflow active 1077 - Settings restored 1078 ``` 1079 1080 - [ ] **Test 14: Database query:** 1081 ```bash 1082 docker exec postgres psql -U postgres -d postgres -c " 1083 SELECT thread_id, workflow, 1084 jsonb_array_length(state->'messages') as msg_count 1085 FROM langgraphs 1086 ORDER BY thread_id DESC 1087 LIMIT 5; 1088 " 1089 ``` 1090 Expected: Recent threads with message counts 1091 1092 #### Step 5.6: File Upload Testing 1093 1094 - [ ] **Test 15: Resume Optimizer workflow:** 1095 ``` 1096 1. Select "Resume Optimizer" profile 1097 2. Expected: Prompt to upload PDF 1098 3. Upload sample PDF resume 1099 4. Expected: 1100 - File uploaded to MinIO 1101 - PDF extracted successfully 1102 - AI provides resume analysis 1103 ``` 1104 1105 - [ ] **Test 16: MinIO storage:** 1106 ```bash 1107 # Check file in MinIO 1108 docker exec minio mc ls myminio/mybucket/ 1109 ``` 1110 1111 - [ ] **Test 17: Multimodal Chat with image:** 1112 ``` 1113 1. Select "Multimodal Chat" profile 1114 2. Upload image file (PNG/JPG) 1115 3. Add text: "What's in this image?" 1116 4. Expected: 1117 - Image uploaded 1118 - Image displayed in chat 1119 - AI describes image content 1120 ``` 1121 1122 #### Step 5.7: UI Testing 1123 1124 - [ ] **Test 18: Theme switching:** 1125 ``` 1126 - Find theme toggle (if available) 1127 - Switch light ↔ dark 1128 - Expected: Colors change smoothly 1129 ``` 1130 1131 - [ ] **Test 19: Responsive design:** 1132 ``` 1133 - Resize browser window 1134 - Test on mobile screen size 1135 - Expected: Layout adapts 1136 ``` 1137 1138 - [ ] **Test 20: All UI elements:** 1139 ``` 1140 - Chat input field works 1141 - Send button works 1142 - File upload button works 1143 - Settings panel opens/closes 1144 - Profile selector works 1145 - No visual glitches 1146 ``` 1147 1148 #### Step 5.8: Error Handling 1149 1150 - [ ] **Test 21: Invalid API key:** 1151 ``` 1152 1. Remove API key from .env 1153 2. Try to send message with that provider 1154 3. Expected: Error message shown to user 1155 ``` 1156 1157 - [ ] **Test 22: Network error:** 1158 ``` 1159 1. Stop MinIO: docker compose stop minio 1160 2. Try to upload file 1161 3. Expected: Error handled gracefully 1162 4. Start MinIO: docker compose start minio 1163 ``` 1164 1165 - [ ] **Test 23: Database connection loss:** 1166 ``` 1167 1. Stop PostgreSQL briefly 1168 2. Try to start new chat 1169 3. Expected: Error message or retry logic 1170 ``` 1171 1172 #### Step 5.9: Performance Testing 1173 1174 - [ ] **Test 24: Response time:** 1175 ``` 1176 - Send message 1177 - Measure time to first token 1178 - Expected: < 2 seconds 1179 ``` 1180 1181 - [ ] **Test 25: Streaming performance:** 1182 ``` 1183 - Send message requesting long response 1184 - Observe streaming 1185 - Expected: Smooth, no delays between tokens 1186 ``` 1187 1188 - [ ] **Test 26: Memory usage:** 1189 ```bash 1190 docker stats --no-stream 1191 # Check chainlit container memory 1192 # Expected: Reasonable (< 2GB for normal usage) 1193 ``` 1194 1195 --- 1196 1197 ### PHASE 6: Docker & Deployment Updates 1198 **Duration:** 3-4 hours 1199 **Risk:** Low 1200 **Blocking:** Phase 5 1201 1202 #### Step 6.1: Update Dockerfile (Optional) 1203 1204 - [ ] **Consider Python version upgrade:** 1205 ```dockerfile 1206 FROM python:3.11-slim # Change from 3.10-slim 1207 ``` 1208 1209 - [ ] **Verify system dependencies:** 1210 ```dockerfile 1211 RUN apt-get update && apt-get install -y --no-install-recommends \ 1212 build-essential \ 1213 libpq-dev \ 1214 libsndfile1 \ 1215 curl \ # For healthcheck 1216 && rm -rf /var/lib/apt/lists/* 1217 ``` 1218 1219 - [ ] **Add healthcheck:** 1220 ```dockerfile 1221 HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \ 1222 CMD curl -f http://localhost:8000/health || exit 1 1223 ``` 1224 1225 #### Step 6.2: Update docker-compose.yml 1226 1227 - [ ] **Add healthchecks:** 1228 ```yaml 1229 services: 1230 chainlit: 1231 healthcheck: 1232 test: ["CMD", "curl", "-f", "http://localhost:8000"] 1233 interval: 30s 1234 timeout: 10s 1235 retries: 3 1236 start_period: 10s 1237 1238 postgres: 1239 healthcheck: 1240 test: ["CMD-SHELL", "pg_isready -U postgres"] 1241 interval: 10s 1242 timeout: 5s 1243 retries: 5 1244 1245 minio: 1246 healthcheck: 1247 test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"] 1248 interval: 30s 1249 timeout: 10s 1250 retries: 3 1251 ``` 1252 1253 - [ ] **Add depends_on with conditions:** 1254 ```yaml 1255 services: 1256 chainlit: 1257 depends_on: 1258 postgres: 1259 condition: service_healthy 1260 minio: 1261 condition: service_healthy 1262 ``` 1263 1264 #### Step 6.3: Test Docker Build 1265 1266 - [ ] **Clean build:** 1267 ```bash 1268 docker compose down -v 1269 docker compose build --no-cache 1270 ``` 1271 1272 - [ ] **Start all services:** 1273 ```bash 1274 docker compose up 1275 ``` 1276 1277 - [ ] **Check healthchecks:** 1278 ```bash 1279 docker compose ps 1280 # All services should show (healthy) 1281 ``` 1282 1283 - [ ] **Test application in Docker:** 1284 ```bash 1285 curl http://localhost:8000 1286 # Should return HTML 1287 ``` 1288 1289 #### Step 6.4: Production Deployment Checklist 1290 1291 - [ ] **Environment variables:** 1292 ```bash 1293 # Verify all required vars in .env: 1294 grep -E "^[A-Z_]+=" .env | wc -l 1295 ``` 1296 1297 - [ ] **Secrets management:** 1298 ``` 1299 - CHAINLIT_AUTH_SECRET set to strong random value 1300 - API keys not hardcoded 1301 - Database passwords secure 1302 ``` 1303 1304 - [ ] **Volume persistence:** 1305 ```bash 1306 # Verify volumes configured in docker-compose.yml 1307 docker volume ls 1308 ``` 1309 1310 - [ ] **Backup strategy:** 1311 ```bash 1312 # Document backup procedure 1313 # Test restore procedure 1314 ``` 1315 1316 - [ ] **Monitoring:** 1317 ``` 1318 - Log aggregation configured 1319 - Error alerting set up 1320 - Performance metrics collected 1321 ``` 1322 1323 --- 1324 1325 ### PHASE 7: Documentation Updates 1326 **Duration:** 2-3 hours 1327 **Risk:** Low 1328 **Blocking:** Phase 6 (can parallelize after Phase 5) 1329 1330 #### Step 7.1: Update README.md 1331 1332 - [ ] **Update version badges:** 1333 ```markdown 1334 [](https://github.com/brucechou1983/chainlit-langgraph) 1335 [](https://github.com/Chainlit/chainlit) 1336 [](https://github.com/langchain-ai/langgraph) 1337 ``` 1338 1339 - [ ] **Add migration notice:** 1340 ```markdown 1341 ## Migration Notes 1342 1343 ### Version 0.4.0 (Breaking Changes) 1344 1345 This version includes major upgrades: 1346 - Chainlit 1.3.1 → 2.8.3 1347 - LangGraph 0.2.45 → 1.0.1 1348 1349 If upgrading from v0.3.x, please read [MIGRATION.md](MIGRATION.md) for detailed instructions. 1350 1351 **Key Changes:** 1352 - Configuration file structure updated 1353 - Python 3.8 no longer supported (minimum 3.10) 1354 - Theme customization moved to separate file 1355 - New security features with cookie-based auth 1356 ``` 1357 1358 - [ ] **Update Getting Started:** 1359 ```markdown 1360 ## Requirements 1361 - Python 3.10 or higher 1362 - Docker & Docker Compose 1363 - API keys for LLM providers (optional, can use Ollama) 1364 ``` 1365 1366 #### Step 7.2: Create MIGRATION.md 1367 1368 - [ ] **Copy this plan document:** 1369 ```bash 1370 # This document serves as MIGRATION.md 1371 # No additional action needed 1372 ``` 1373 1374 #### Step 7.3: Update CHANGELOG.md 1375 1376 - [ ] **Add new version entry:** 1377 ```markdown 1378 ## [0.4.0] - 2025-10-27 1379 1380 ### Changed 1381 - **BREAKING:** Upgraded Chainlit from 1.3.1 to 2.8.3 1382 - **BREAKING:** Configuration file structure changed - theme and audio sections removed 1383 - **BREAKING:** Python 3.8 support dropped (minimum Python 3.10) 1384 - Upgraded LangGraph from 0.2.45 to 1.0.1 1385 - Updated LangChain packages to latest compatible versions 1386 - Authentication now uses secure cookie-based system 1387 1388 ### Added 1389 - Optional theme.json for custom theme configuration 1390 - Improved security with updated FastAPI/Starlette 1391 - Better UI with Shadcn/Tailwind rewrite 1392 - Access to LangGraph 1.0 features (node caching, commands, etc.) 1393 1394 ### Removed 1395 - Audio configuration from config.toml (use new API if needed) 1396 - Theme configuration from config.toml (moved to theme.json) 1397 - Support for Python 3.8 1398 1399 ### Migration 1400 - See [MIGRATION.md](MIGRATION.md) for detailed upgrade instructions 1401 - Backup your database before upgrading 1402 - Update your .chainlit/config.toml (remove deprecated sections) 1403 - Test thoroughly after upgrade 1404 1405 ### Security 1406 - Fixed CVE-2024-47874 via FastAPI/Starlette updates 1407 - Improved authentication security with httpOnly cookies 1408 ``` 1409 1410 #### Step 7.4: Update Version Files 1411 1412 - [ ] **Update chat_workflow/version.py:** 1413 ```python 1414 __version__ = "0.4.0" 1415 ``` 1416 1417 - [ ] **Update pyproject.toml:** 1418 ```toml 1419 [tool.commitizen] 1420 version = "0.4.0" 1421 ``` 1422 1423 - [ ] **Commit version bump:** 1424 ```bash 1425 git add chat_workflow/version.py pyproject.toml 1426 git commit -m "bump: version 0.3.1 → 0.4.0" 1427 ``` 1428 1429 #### Step 7.5: Update Configuration Documentation 1430 1431 - [ ] **Document new config structure:** 1432 Create `.chainlit/README.md`: 1433 ```markdown 1434 # Chainlit Configuration 1435 1436 ## config.toml 1437 1438 Main configuration file. After upgrade to Chainlit 2.8.3: 1439 1440 - ❌ Removed: `follow_symlink`, `custom_font`, `audio`, `theme` 1441 - ✅ Kept: `project`, `features`, `UI` (basic settings) 1442 1443 ## theme.json (Optional) 1444 1445 Custom theme configuration. Create this file if you want to customize colors. 1446 1447 Example: 1448 ```json 1449 { 1450 "default": "dark", 1451 "light": { ... }, 1452 "dark": { ... } 1453 } 1454 ``` 1455 1456 See: https://docs.chainlit.io/customization/theming 1457 ``` 1458 1459 --- 1460 1461 ### PHASE 8: Post-Upgrade Optimization (Optional) 1462 **Duration:** Variable 1463 **Risk:** Low 1464 **Blocking:** Phases 1-7 complete 1465 1466 #### Future Enhancement Opportunities 1467 1468 - [ ] **Leverage LangGraph 1.0 Features:** 1469 1470 **Node Caching:** 1471 ```python 1472 # Add caching to expensive nodes 1473 graph.add_node("expensive_computation", compute_fn, cache=True) 1474 ``` 1475 1476 **Deferred Nodes:** 1477 ```python 1478 # Wait for all upstream paths before summarizing 1479 graph.add_node("final_summary", summarize_fn, deferred=True) 1480 ``` 1481 1482 **Command API:** 1483 ```python 1484 from langgraph.types import Command 1485 # More flexible than traditional edges 1486 ``` 1487 1488 - [ ] **Explore Chainlit 2.0 Features:** 1489 1490 **Custom Elements:** 1491 ```python 1492 # Create custom UI elements with Shadcn components 1493 ``` 1494 1495 **New Theme System:** 1496 ```python 1497 # Advanced theme customization with theme.json 1498 ``` 1499 1500 **Audio Streaming (if needed):** 1501 ```python 1502 @cl.on_audio_start 1503 async def on_audio_start(): 1504 # New audio API 1505 ``` 1506 1507 - [ ] **Python 3.11+ Upgrade:** 1508 ```dockerfile 1509 FROM python:3.11-slim 1510 # Benefits: Better performance, improved error messages 1511 ``` 1512 1513 - [ ] **Performance Optimization:** 1514 - Profile streaming performance 1515 - Optimize database queries 1516 - Add caching layers 1517 - Implement rate limiting 1518 1519 - [ ] **Security Hardening:** 1520 - Review cookie security settings 1521 - Implement CSP headers 1522 - Add rate limiting 1523 - Audit API key handling 1524 1525 --- 1526 1527 ## Rollback Procedures 1528 1529 ### Quick Rollback (< 5 minutes) 1530 1531 ```bash 1532 # Run rollback script created in Phase 0 1533 ./rollback.sh 1534 ``` 1535 1536 ### Manual Rollback 1537 1538 #### Step 1: Restore Dependencies 1539 ```bash 1540 cp pyproject.toml.backup pyproject.toml 1541 cp poetry.lock.backup poetry.lock 1542 poetry install 1543 ``` 1544 1545 #### Step 2: Restore Configuration 1546 ```bash 1547 cp .chainlit/config.toml.backup .chainlit/config.toml 1548 rm .chainlit/theme.json # If created 1549 ``` 1550 1551 #### Step 3: Restore Database 1552 ```bash 1553 docker exec -i postgres psql -U postgres postgres < backup-pre-upgrade-*.sql 1554 ``` 1555 1556 #### Step 4: Restart Services 1557 ```bash 1558 docker compose down 1559 docker compose up -d 1560 ``` 1561 1562 #### Step 5: Verify 1563 ```bash 1564 curl http://localhost:8000 1565 # Check version in logs 1566 ``` 1567 1568 ### Git Rollback 1569 1570 ```bash 1571 # If changes committed 1572 git log --oneline 1573 git revert <commit-hash> 1574 git push origin claude/upgrade-chainlit-langraph-011CUXSzH8vJY23G3tyoznkW 1575 ``` 1576 1577 --- 1578 1579 ## Testing Checklist Summary 1580 1581 ### Critical Tests (Must Pass) 1582 - [ ] Application starts without errors 1583 - [ ] Authentication works (password + OAuth if configured) 1584 - [ ] All 5 workflows discoverable 1585 - [ ] Can send/receive messages with streaming 1586 - [ ] State persists across sessions 1587 - [ ] Database queries work 1588 - [ ] File uploads work (MinIO) 1589 - [ ] Settings updates apply 1590 1591 ### Important Tests (Should Pass) 1592 - [ ] All unit tests pass 1593 - [ ] UI renders correctly 1594 - [ ] Dark/light theme works 1595 - [ ] Multimodal chat with images 1596 - [ ] Tool calling works 1597 - [ ] Resume PDF extraction works 1598 - [ ] No console errors 1599 - [ ] Reasonable performance 1600 1601 ### Nice-to-Have Tests 1602 - [ ] Test coverage maintained 1603 - [ ] Documentation updated 1604 - [ ] Docker build optimized 1605 - [ ] Healthchecks working 1606 - [ ] Monitoring configured 1607 1608 --- 1609 1610 ## Risk Matrix 1611 1612 | Risk | Probability | Impact | Mitigation | 1613 |------|-------------|--------|------------| 1614 | Config file errors | High | High | Backup, test immediately | 1615 | Database schema changes | Low | High | Full backup, test migrations | 1616 | Auth flow breaks | Low | High | Test immediately after upgrade | 1617 | State serialization fails | Low | High | Test with existing data | 1618 | UI rendering issues | Medium | Medium | Visual QA, browser testing | 1619 | Performance degradation | Low | Medium | Benchmark before/after | 1620 | Docker build fails | Low | Medium | Test in stages | 1621 | Loss of features | Low | Low | Full feature testing | 1622 1623 --- 1624 1625 ## Success Metrics 1626 1627 ### Technical Metrics 1628 - ✅ Zero critical errors in logs 1629 - ✅ All tests passing (100%) 1630 - ✅ Response time < 2s (first token) 1631 - ✅ Memory usage < 2GB (normal load) 1632 - ✅ All 5 workflows functional 1633 - ✅ 100% feature parity with v0.3.1 1634 1635 ### Business Metrics 1636 - ✅ Zero user-reported issues 1637 - ✅ No data loss 1638 - ✅ Same or better UX 1639 - ✅ Improved security posture 1640 1641 --- 1642 1643 ## Support Resources 1644 1645 ### Official Documentation 1646 - [Chainlit 2.0 Migration Guide](https://docs.chainlit.io/guides/migration/2.0.0) 1647 - [Chainlit 2.8.3 Docs](https://docs.chainlit.io/) 1648 - [LangGraph 1.0 Docs](https://langchain-ai.github.io/langgraph/) 1649 - [LangChain 0.3 Docs](https://python.langchain.com/docs/versions/v0_3/) 1650 1651 ### Community Support 1652 - [Chainlit GitHub Issues](https://github.com/Chainlit/chainlit/issues) 1653 - [Chainlit Discord](https://discord.gg/chainlit) 1654 - [LangChain Discord](https://discord.gg/langchain) 1655 - [LangGraph Discussions](https://github.com/langchain-ai/langgraph/discussions) 1656 1657 ### Troubleshooting Common Issues 1658 1659 **Issue:** "Unknown config field" error 1660 - **Solution:** Remove deprecated fields from config.toml 1661 1662 **Issue:** Authentication not working 1663 - **Solution:** Check CHAINLIT_AUTH_SECRET is set, cookies enabled 1664 1665 **Issue:** Workflows not loading 1666 - **Solution:** Check module discovery logs, verify imports 1667 1668 **Issue:** Database connection errors 1669 - **Solution:** Verify PostgreSQL running, check credentials 1670 1671 **Issue:** MinIO upload fails 1672 - **Solution:** Check MinIO running, bucket exists, credentials correct 1673 1674 --- 1675 1676 ## Approval & Sign-off 1677 1678 **Before proceeding with upgrade:** 1679 1680 - [ ] All stakeholders informed 1681 - [ ] Backup verified and tested 1682 - [ ] Rollback plan understood 1683 - [ ] Testing environment available 1684 - [ ] Maintenance window scheduled 1685 - [ ] Team members assigned roles 1686 - [ ] Monitoring and alerting ready 1687 - [ ] Communication plan in place 1688 1689 **Approved by:** _________________ 1690 **Date:** _________________ 1691 **Scheduled for:** _________________ 1692 1693 --- 1694 1695 ## Execution Log 1696 1697 ### Phase 0: Preparation 1698 - Started: __________ 1699 - Completed: __________ 1700 - Issues: __________ 1701 - Notes: __________ 1702 1703 ### Phase 1: Dependencies 1704 - Started: __________ 1705 - Completed: __________ 1706 - Issues: __________ 1707 - Notes: __________ 1708 1709 ### Phase 2: Configuration 1710 - Started: __________ 1711 - Completed: __________ 1712 - Issues: __________ 1713 - Notes: __________ 1714 1715 ### Phase 3: Code Migration 1716 - Started: __________ 1717 - Completed: __________ 1718 - Issues: __________ 1719 - Notes: __________ 1720 1721 ### Phase 4: Database 1722 - Started: __________ 1723 - Completed: __________ 1724 - Issues: __________ 1725 - Notes: __________ 1726 1727 ### Phase 5: Testing 1728 - Started: __________ 1729 - Completed: __________ 1730 - Issues: __________ 1731 - Notes: __________ 1732 1733 ### Phase 6: Docker 1734 - Started: __________ 1735 - Completed: __________ 1736 - Issues: __________ 1737 - Notes: __________ 1738 1739 ### Phase 7: Documentation 1740 - Started: __________ 1741 - Completed: __________ 1742 - Issues: __________ 1743 - Notes: __________ 1744 1745 --- 1746 1747 ## Post-Upgrade Review 1748 1749 **Completed:** __________ 1750 **Total Duration:** __________ 1751 **Issues Encountered:** __________ 1752 **Lessons Learned:** __________ 1753 **Recommendations:** __________ 1754 1755 --- 1756 1757 **Document Version:** 1.0 1758 **Last Updated:** 2025-10-27 1759 **Next Review:** After upgrade completion