v4-v6 upgrade improvement and warning about file auto backup

bmad/bmm/workflows/testarch/trace/instructions.md

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+<!-- Powered by BMAD-CORE™ -->
+
+# Requirements Traceability v3.0
+
+```xml
+<task id="bmad/bmm/testarch/trace" name="Requirements Traceability">
+  <llm critical="true">
+    <i>Preflight requirements:</i>
+    <i>- Story has implemented tests (or acknowledge gaps).</i>
+    <i>- Access to source code and specifications is available.</i>
+  </llm>
+  <flow>
+    <step n="1" title="Preflight">
+      <action>Confirm prerequisites; halt if tests or specs are unavailable.</action>
+    </step>
+    <step n="2" title="Trace Coverage">
+      <action>Gather acceptance criteria and implemented tests.</action>
+      <action>Map each criterion to concrete tests (file + describe/it) using Given-When-Then narrative.</action>
+      <action>Classify coverage status as FULL, PARTIAL, NONE, UNIT-ONLY, or INTEGRATION-ONLY.</action>
+      <action>Flag severity based on priority (P0 gaps are critical) and recommend additional tests or refactors.</action>
+      <action>Build gate YAML coverage summary reflecting totals and gaps.</action>
+    </step>
+    <step n="3" title="Deliverables">
+      <action>Generate traceability report under `docs/qa/assessments`, a coverage matrix per criterion, and gate YAML snippet capturing totals/gaps.</action>
+    </step>
+  </flow>
+  <halt>
+    <i>If story lacks implemented tests, pause and advise running `*atdd` or writing tests before tracing.</i>
+  </halt>
+  <notes>
+    <i>Use `{project-root}/bmad/bmm/testarch/tea-index.csv` to load traceability-relevant fragments (risk-governance, selective-testing, test-quality) as needed.</i>
+    <i>Coverage definitions: FULL=all scenarios validated, PARTIAL=some coverage, NONE=no validation, UNIT-ONLY=missing higher-level validation, INTEGRATION-ONLY=lacks lower-level confidence.</i>
+    <i>Ensure assertions stay explicit and avoid duplicate coverage.</i>
+  </notes>
+  <output>
+    <i>Traceability matrix and gate snippet ready for review.</i>
+  </output>
+</task>
+```

bmad/bmm/workflows/testarch/trace/workflow.yaml

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+# Test Architect workflow: trace
+name: testarch-trace
+description: "Trace requirements to implemented automated tests."
+author: "BMad"
+
+config_source: "{project-root}/bmad/bmm/config.yaml"
+output_folder: "{config_source}:output_folder"
+user_name: "{config_source}:user_name"
+communication_language: "{config_source}:communication_language"
+date: system-generated
+
+installed_path: "{project-root}/bmad/bmm/workflows/testarch/trace"
+instructions: "{installed_path}/instructions.md"
+
+template: false
+
+tags:
+  - qa
+  - traceability
+  - test-architect
+
+execution_hints:
+  interactive: false
+  autonomous: true
+  iterative: true