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docs/pre11-batch-b.md

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+# Pre11 Batch B: Vnode Operation Scaffolding
+
+## Scope
+
+This batch is a behavior-preserving cleanup limited to vnode operation
+scaffolding:
+
+- removed the unused `EROFS_MOUNT_XATTR_USER` option bit;
+- removed the zero-consumer `erofs_node.vnode` field and its only assignment;
+- grouped VOP forward declarations and `erofs_vnodeops` initializers by
+  responsibility.
+
+No function definitions, VOP registrations, lock or reclaim behavior,
+`vnode_create_vobject()` error handling, or FIFO operations were changed.
+
+## Consumer Audit
+
+Before the edit, `EROFS_MOUNT_XATTR_USER` appeared only at its definition.
+The `erofs_node.vnode` member appeared only in the structure definition and in
+the single assignment performed by `erofs_vget()`; it had no read, address, ABI,
+initializer, or offset consumer.
+
+After the edit, both removed symbols have zero source-tree matches.
+
+## VOP Vector Equivalence
+
+Before reordering:
+
+- `erofs_vnodeops`: 24 raw entries, 24 unique normalized `field=value` entries;
+- `erofs_fifoops`: 14 raw entries, 14 unique normalized `field=value` entries.
+
+After reordering:
+
+- `erofs_vnodeops`: 24 raw entries, 24 unique entries, with the sorted
+  normalized set identical to the before snapshot;
+- `erofs_fifoops`: 14 raw entries, 14 unique entries, with both the sorted set
+  and original entry sequence identical to the before snapshot.
+
+## Validation
+
+The batch uses static checks only:
+
+- normalized before/after VOP vector set comparison;
+- raw entry count versus unique entry count;
+- removed-symbol zero-consumer search;
+- changed-path whitelist;
+- `git diff --check` and conflict-marker scan.
+
+No build, QEMU smoke test, or feature test was run for this mechanical batch.