chore: add AGENTS.md, tasks/todo.md, and tasks/lessons.md for workflow management

tasks/todo.md

@@ -0,0 +1,25 @@
+# Task Plan
+
+## Checklist
+
+- [x] Clarify scope, repository boundaries, and validation requirements for a repository-level AGENTS.md.
+- [x] Verify that the plan covers the user-specified workflow rules, project structure, and risk points.
+- [x] Create a complete AGENTS.md that embeds the requested workflow orchestration rules and repo-specific guardrails.
+- [x] Verify the generated AGENTS.md against the current repository structure and required workflow sections.
+- [x] Update the Review section with the final result and verification evidence.
+
+## Scope And Risks
+
+- Scope: add a repository-root AGENTS.md that governs future modifications across the Go backend, Vue frontend, deployment assets, and embedded Python managed services.
+- Risk: omit a repository area or validation command and leave future work under-constrained.
+- Risk: copy the requested workflow rules without adapting them to this repo's actual layout and toolchain.
+- Risk: finish without writing persistent task evidence for plan, review, and lessons.
+
+## Review
+
+- Status: completed.
+- Result: added a repository-root `AGENTS.md` plus `tasks/todo.md` and `tasks/lessons.md` to enforce the requested workflow for future non-trivial tasks.
+- Verification:
+  - confirmed `AGENTS.md` exists at the repository root;
+  - read back `AGENTS.md` and verified it covers workflow orchestration, task management, repo structure, validation matrix, and definition of done;
+  - matched required repository-specific references including `internal/webdevice/`, `managed/people_flow_project/`, `managed/store_dwell_alert/`, `tasks/todo.md`, and `tasks/lessons.md`.