feat: refactor to Deep Agents architecture#503
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- Replace react.js with clean deepAgents.js using createDeepAgent - Delete subAgent tool family (subAgent.js, subAgentLog.js, subAgentMessage.js) - Remove SUB_AGENT_TEMPERATURE env var handling - Remove old react_agent tests - Update index.js to use invokeAgent with Deep Agents streaming - Add coding-agent and utility-agent subagents with SUB_AGENT.md prompts - Fix process tool name from processTool to process - All 1128 tests passing
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Audit ResultsStatus: Complete Verification:
Diff: +624 / -2943 lines across 23 files Specs vs Implementation:
Ready for review and merge. |
- Remove unused variables from invokeAgent (signal, maxContextLength, maxTokens) - Remove unused namespace variable from stream loop - Auto-format index.js and prompts.test.js
The checkpointer requires thread_id in the configurable property to persist conversation state. Added configurable to streamOptions.
Pass systemPrompt to createDeepAgentsOrchestrator factory. Remove manual SystemMessage prepending from invokeAgent.
- streamMode: ['updates', 'messages'] to get text chunks and tool events - Handle mode === 'messages' for text/reasoning output - Handle mode === 'updates' for tool_start/tool_end/tool_error events
- Fix letconst syntax error from corrupted patch - Add missing variable initializations (currentMessages, compactionActive, etc.) - Restore proper while loop and try/catch structure - System prompt prepending restored in invokeAgent for new threads
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Deep Agents Overlap Analysisdeepagents provides built-in middleware that includes these tool categories:
Overlapping Tools (can be removed from madz)
Non-Overlapping Tools (unique to madz — keep)
Summary: 9 of 25 tools overlap with deepagents middleware. The remaining 16 are unique to madz and should stay. Want me to remove the overlapping tools and wire up the deepagents middleware instead? |
…apping tools - Create FileBackend implementing BackendProtocolV2 for file storage - Wire up createFilesystemMiddleware, createMemoryMiddleware, createSkillsMiddleware, createSummarizationMiddleware - Remove 9 overlapping tools from madz (readFile, writeFile, patch, searchFiles, memory, skillView, createSkill, compactContext, compaction) - Remove LRU caching from deepAgents.js - Remove unused compaction logic, constants, and imports - Remaining 16 tools are madz-specific and stay
- Delete obsolete tests for removed compactContext and compaction tools - Update tool_index.test.js to reflect current tool registry (16 tools) - Update tool_registration.test.js assertions for removed tools
The TUI's handleChat callback expects events with { type, text } shape,
but callProvider was passing raw strings. This caused assistant response
text to never render in the conversation panel.
- Pass middleware array to createDeepAgent (was built but never wired in)
- Fix streaming callback to pass structured {type, text} events instead of raw strings
- Remove unused RECURSION_LIMIT_MESSAGE constant
- Remove unnecessary try/catch re-throw wrapper in callProvider
- Prefix unused namespace variable with _ to satisfy linter
- README.md: Agent section, tools table, env vars, directory structure - docs/OVERVIEW.md: Replace Sub-Agent section with Deep Agents, remove Sub-Agent Log/Message sections - docs/FLOWS.md: Replace Sub-Agent flows with Deep Agents orchestration flow - docs/TUTORIAL.md: Update built-in tools section
- README.md: remove subAgent config entries, change 'specialized sub-agents' to 'specialized agents' - docs/OVERVIEW.md: remove sub-agent references, rephrase code identifiers - docs/FLOWS.md: change section titles and references
- README.md: remove subAgent, subAgentLog, subAgentMessage from tools table - docs/FLOWS.md: remove subAgentLog from file dependencies - docs/TUTORIAL.md: remove subAgent tool mention
- Split tools into Deep Agents middleware (filesystem, memory, skills, summarization) - and built-in LangChain tools gated by sandbox permissions - Omitted compactContext as requested
Removed filesystem.js, memory.js, skills.js, compact_context.js, compaction.js and their tests — these are now handled by deepagents middleware.
- Delete prompts/COMPACTION.md - Rename SUB_AGENT.md → CODE_AGENT.md - Update deepAgents.js to load CODE_AGENT.md - Rewrite CODE_AGENT.md as a tight, deliverables-focused coding agent prompt
…dule and tiny-lru - Replace 'sub-agent' with 'deep agent' in system prompt (3 occurrences) - Delete src/cache/llm_cache.js and remove tiny-lru dependency
…from deepagents - Remove utility-agent subagent from src/agent/deepAgents.js - Remove utilityAgent config from config.yaml - Update README.md, docs/OVERVIEW.md, docs/FLOWS.md, docs/TUTORIAL.md - Update JSDoc comment in deepAgents.js
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Description
Refactored the LangGraph-based ReAct agent to use LangChain's Deep Agents architecture. Replaced the process-spawning subAgent tool family with a native orchestrator that manages specialized agents (coding agent, utility agent) for task delegation.
Changes
Architecture
Main Agent (orchestrator) with coding-agent and utility-agent subagents.
Uses createDeepAgent with streamMode updates and subgraphs true for native streaming.
Testing
Related Issues
Closes #502