docs(changelog): update for 2026-05-16 and 2026-05-17

CHANGE.md

@@ -4,6 +4,37 @@ This document tracks all significant changes to Gadget Code, organized by date.
 
 ---
 
+## 2026-05-17 (Sunday)
+
+**Subagent Context Management and Tooling Stability**
+
+Today's focus shifted towards improving subagent context management and stabilizing developmental tools, including a fix for the prompt editor.
+
+### Changes:
+- **Subagent**: Implemented improvements to subagent context management.
+- **Development**: Fixed prompt editor functionality.
+- **Documentation**: Added gadget-tasks architecture documentation and updated technical documentation (README, `agent-toolbox.md`).
+- **Dependencies/Build**: Addressed installation and global link issues.
+
+---
+
+## 2026-05-16 (Saturday)
+
+**Gadget-Tasks Architecture Correction and AI Toolbox Refactor**
+
+This update covers major architectural changes to `gadget-tasks` transition to a headless IDE client and the reorganization of the AI toolbox structure.
+
+### Changes:
+- **Architecture**: Converted `gadget-tasks` from directly accessing MongoDB to a headless IDE client architecture using REST API and Socket.IO.
+- **Infrastructure**: Added `platform.ts` (headless IDE client with session lock and workspace mode) to `gadget-tasks`.
+- **Cleanup**: Removed duplicated/no longer needed code in `gadget-tasks` (Mongoose models, internal prompt templates, task executor, AI services, and workspace management).
+- **AI Toolbox**: Completed refactor and extraction of the AI toolbox from `@gadget/ai` into `@gadget/ai-toolbox`.
+- **Project Manager**: Implemented upgrades across Phases 1-4.
+- **Infrastructure**: Added necessary backend routes (`PATCH /api/v1/projects/:projectId/tasks/:taskId/lastRun`) and service methods for atomic task field updates.
+- **Project Configuration**: Updated `GadgetTasksConfig` and removed unneeded dependencies (`mongoose`, `dayjs`, `simple-git`, etc.).
+
+---
+
 ## 2026-05-15 (Thursday)
 
 **Context Window Configuration Added**