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+
+Some PDF files in wayback were crawled externally by the Common Crawl project,
+and are truncted to 128 KB (130775 bytes). This corrupts the PDF files, and
+they can not be read. We want to remove these from the catalog, or at least,
+mark them as non-archival and "truncated" (in `content_scope` field).
+
+See the cleanup file for prep, counts, and other background.
+
+There were over 600 file entities with the exact file size. Some are valid, but
+over 400 were found to be corrupt, and updated in the catalog. The majority
+seemed to have alternate captures and distinct file entities (not truncated).
+
+## Prod Commands
+
+Configure CLI:
+
+    export FATCAT_API_HOST=https://api.fatcat.wiki
+    export FATCAT_AUTH_WORKER_CLEANUP=[...]
+    export FATCAT_API_AUTH_TOKEN=$FATCAT_AUTH_WORKER_CLEANUP
+
+    fatcat-cli --version
+    fatcat-cli 0.1.6
+
+    fatcat-cli status
+         API Version: 0.5.0 (local)
+            API host: https://api.fatcat.wiki [successfully connected]
+      Last changelog: 5636508
+      API auth token: [configured]
+             Account: cleanup-bot [bot] [admin] [active]
+                      editor_vvnmtzskhngxnicockn4iavyxq
+
+Start small and review:
+
+    cat /srv/fatcat/datasets/truncated_sha1.txt \
+        | awk '{print "sha1:" $0}' \
+        | parallel -j1 fatcat-cli get {} --json \
+        | jq . -c \
+        | rg -v '"content_scope"' \
+        | rg 130775 \
+        | head -n10 \
+        | fatcat-cli batch update file release_ids= content_scope=truncated --description 'Flag truncated/corrupt PDFs (due to common crawl truncation)'
+    # editgroup_3mviue5zebge3d2lqafgkfgwqa
+
+Reviewed and all were corrupt. Running the rest of the batch:
+
+    cat /srv/fatcat/datasets/truncated_sha1.txt \
+        | awk '{print "sha1:" $0}' \
+        | parallel -j1 fatcat-cli get {} --json \
+        | jq . -c \
+        | rg -v '"content_scope"' \
+        | rg 130775 \
+        | fatcat-cli batch update file release_ids= content_scope=truncated --description 'Flag truncated/corrupt PDFs (due to common crawl truncation)' --auto-accept
+
+And then the other batch for review (no `--auto-accept`):
+
+    cat /srv/fatcat/datasets/unknown_sha1.txt \
+        | awk '{print "sha1:" $0}' \
+        | parallel -j1 fatcat-cli get {} --json \
+        | jq . -c \
+        | rg -v '"content_scope"' \
+        | rg 130775 \
+        | fatcat-cli batch update file release_ids= content_scope=truncated --description 'Flag truncated/corrupt PDFs (due to common crawl truncation)'
+    # editgroup_7l32piag7vho5d6gz6ee6zbtgi
+    # editgroup_cnoheod4jjbevdzez7m5z4o64i
+    # editgroup_w3fdmv4ffjeytnfjh32t5yovsq
+
+These files were *not* truncated:
+
+    file_2unklhykw5dwpotmslsldhlofy / 68821b6042a0a15fc788e99a400a1e7129d651a3
+    file_xyfssct5pvde3ebg64bxoudcri / 7f307ebc2ce71c5f8a32ea4a77319403c8b87d95
+    file_rrwbddwwrjg5tk4zyr5g63p2xi / ebe9f9d5d9def885e5a1ef220238f9ea9907dde1
+    file_5bbhyx6labaxniz3pm2lvkr3wq / e498ee945b57b2d556bb2ed4a7d83e103bb3cc07
+
+All the other "unknown" were, and were updated (editgroups accepted).