Add

.gitea/workflows/txt-hashes.yml

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+name: Hash all .txt files
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  txt_hashes:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Compute SHA-256 hashes for all .txt files
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          # Find all .txt files, sort deterministically, hash each, and output "hash  path"
+          # Then hash the manifest itself so you can compare runs easily.
+          manifest="txt_sha256_manifest.txt"
+
+          find . -type f -name '*.txt' -print0 \
+            | LC_ALL=C sort -z \
+            | xargs -0 sha256sum \
+            | sed 's|^\([0-9a-f]\+\)  \./|\1  |' \
+            > "${manifest}"
+
+          echo "---- Manifest (${manifest}) ----"
+          cat "${manifest}"
+
+          echo "---- Manifest SHA-256 ----"
+          sha256sum "${manifest}"
+
+      # Optional: keep the manifest as a downloadable artifact (if your Gitea Actions setup supports artifacts)
+      # - name: Upload manifest artifact
+      #   uses: actions/upload-artifact@v4
+      #   with:
+      #     name: txt-sha256-manifest
+      #     path: txt_sha256_manifest.txt

b.txt

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+a