brain: import only materialized reader comparisons

Author: niakw

.github/workflows/native-reader-learning-sync.yml

@@ -79,6 +79,7 @@ jobs:
           PY
 
       - name: Download exact Android reader-repair comparison
+        id: evidence
         if: steps.source.outputs.duplicate != 'true'
         env:
           GH_TOKEN: ${{ github.token }}
@@ -87,13 +88,17 @@ jobs:
         run: |
           set -euo pipefail
           mkdir -p reader-learning-input/acceptance
-          gh run download "$RUN_ID" --name "native-reader-brain-repair-$RUN_ID" --dir reader-learning-input/acceptance || true
-          if [ ! -s reader-learning-input/acceptance/tv-reader-repair-comparison.json ]; then
-            printf '{"acceptedCount":0,"rejectedCount":0,"inconclusiveCount":0,"accepted":[],"rejected":[],"inconclusive":[]}\n' > reader-learning-input/acceptance/tv-reader-repair-comparison.json
+          if gh run download "$RUN_ID" --name "native-reader-brain-repair-$RUN_ID" --dir reader-learning-input/acceptance \
+            && [ -s reader-learning-input/acceptance/tv-reader-repair-comparison.json ]; then
+            echo "has_comparison=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "has_comparison=false" >> "$GITHUB_OUTPUT"
+            rm -rf reader-learning-input/acceptance
+            echo "No materialized reader-repair comparison for run $RUN_ID; nothing is learned and the run remains importable after a rerun."
           fi
 
       - name: Merge sanitized reader repair memory once
-        if: steps.source.outputs.duplicate != 'true'
+        if: steps.source.outputs.duplicate != 'true' && steps.evidence.outputs.has_comparison == 'true'
         env:
           RUN_ID: ${{ steps.source.outputs.run_id }}
         shell: bash
@@ -128,8 +133,13 @@ jobs:
         shell: bash
         run: echo "Reader run ${{ steps.source.outputs.run_id }} was already imported; no counters changed."
 
+      - name: Report missing reader comparison
+        if: steps.source.outputs.duplicate != 'true' && steps.evidence.outputs.has_comparison != 'true'
+        shell: bash
+        run: echo "Reader run ${{ steps.source.outputs.run_id }} produced no importable repair comparison; persistent Brain state is unchanged."
+
       - name: Update the single Brain memory branch
-        if: steps.source.outputs.duplicate != 'true'
+        if: steps.source.outputs.duplicate != 'true' && steps.evidence.outputs.has_comparison == 'true'
         shell: bash
         run: |
           set -euo pipefail