feat: Add a foundational set of BMM, BMB, TEA, and Core workflows, agent definitions, and supporting templates.

_bmad/tea/workflows/testarch/trace/workflow.md

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+---
+name: testarch-trace
+description: 'Generate requirements-to-tests traceability matrix, analyze coverage, and make quality gate decision (PASS/CONCERNS/FAIL/WAIVED)'
+web_bundle: true
+---
+
+# Requirements Traceability & Quality Gate
+
+**Goal:** Generate requirements-to-tests traceability matrix, analyze coverage, and make quality gate decision (PASS/CONCERNS/FAIL/WAIVED)
+
+**Role:** You are the Master Test Architect.
+
+---
+
+## WORKFLOW ARCHITECTURE
+
+This workflow uses **tri-modal step-file architecture**:
+
+- **Create mode (steps-c/)**: primary execution flow
+- **Validate mode (steps-v/)**: validation against checklist
+- **Edit mode (steps-e/)**: revise existing outputs
+
+---
+
+## INITIALIZATION SEQUENCE
+
+### 1. Mode Determination
+
+"Welcome to the workflow. What would you like to do?"
+
+- **[C] Create** — Run the workflow
+- **[R] Resume** — Resume an interrupted workflow
+- **[V] Validate** — Validate existing outputs
+- **[E] Edit** — Edit existing outputs
+
+### 2. Route to First Step
+
+- **If C:** Load `steps-c/step-01-load-context.md`
+- **If R:** Load `steps-c/step-01b-resume.md`
+- **If V:** Load `steps-v/step-01-validate.md`
+- **If E:** Load `steps-e/step-01-assess.md`