diff --git a/psf-memo-client/specs/txid-wire-encoding.feature b/psf-memo-client/specs/txid-wire-encoding.feature
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+++ b/psf-memo-client/specs/txid-wire-encoding.feature
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+# Scenarios: Txid wire encoding - 1, Txid wire encoding - 2, Txid wire encoding - 3, Txid wire encoding - 4
+#
+# Memo actions that reference a parent transaction embed that txid as 32 raw
+# bytes. The wire order is little-endian: the reverse of the 64-character
+# display txid. The indexer reverses those bytes back into the display txid so
+# the referenced post, reply, or poll can be found. This feature pins the wire
+# byte order for every client action that references a parent txid: like,
+# reply, poll option, and poll vote.
+Feature: Txid wire encoding
+
+  Background:
+    Given a wallet authenticated for the address bitcoincash:qqlrzp23w08434twmvr4fxw672whkjy0py26r63g3d
+    Given the wallet has spendable output to pay the transaction fee
+
+  Scenario Outline: Txid wire encoding - 1 a like broadcasts the post txid in little-endian wire order
+    Given a post with the txid <txid> authored by the author address
+    When I click the heart icon on the post with txid <txid>
+    When I submit the like without a tip
+    Then the wallet broadcasts an OP_RETURN transaction with the Memo like prefix and the post txid <txid>
+
+    Examples:
+      | txid                                                             |
+      | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef |
+      | 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff |
+
+  Scenario Outline: Txid wire encoding - 2 a reply broadcasts the parent txid in little-endian wire order
+    Given I open the thread for the post with txid <txid>
+    When I type a reply with the text "<message>"
+    When I submit the reply
+    Then the wallet broadcasts an OP_RETURN transaction with the Memo reply prefix
+
+    Examples:
+      | txid                                                             | message      |
+      | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef | hello memo   |
+      | 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff | a second one |
+
+  Scenario Outline: Txid wire encoding - 3 a poll option broadcasts the poll txid in little-endian wire order
+    Given a poll with the txid <txid>
+    When I open the poll with txid <txid>
+    When I compose an option with the text "<option>"
+    When I submit the option
+    Then the app broadcasts an OP_RETURN transaction with the Memo add-poll-option prefix for the poll <txid>
+
+    Examples:
+      | txid                                                             | option |
+      | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef | yes    |
+      | 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff | no     |
+
+  Scenario Outline: Txid wire encoding - 4 a poll vote broadcasts the poll txid in little-endian wire order
+    Given a poll with the txid <txid>
+    When I open the poll with txid <txid>
+    When I vote with the comment "<comment>"
+    When I submit the vote
+    Then the app broadcasts an OP_RETURN transaction with the Memo poll-vote prefix for the poll <txid>
+
+    Examples:
+      | txid                                                             | comment       |
+      | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef | yes           |
+      | 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff | I choose this |
diff --git a/psf-memo-db/specs/repair-txid-encoding.feature b/psf-memo-db/specs/repair-txid-encoding.feature
new file mode 100644
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+++ b/psf-memo-db/specs/repair-txid-encoding.feature
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+# Scenarios: Repair txid encoding - 1, Repair txid encoding - 2, Repair txid encoding - 3, Repair txid encoding - 4, Repair txid encoding - 5, Repair txid encoding - 6
+#
+# Older psf-memo-client broadcasts embedded a referenced txid in big-endian
+# display order. The indexer expected little-endian wire order, so it stored a
+# byte-reversed reference in the likes, postLikes, postParents, postChildren,
+# pollOptions, and pollVotes stores. The txid repair utility rewrites a
+# reversed reference to display order and rebuilds the affected secondary
+# index. It leaves correctly-encoded records untouched, leaves references whose
+# target is unknown in either byte order untouched, and is idempotent.
+Feature: Repair txid encoding
+
+  Background:
+    Given a psf-memo-db instance with posts, likes, postLikes, postParents, postChildren, polls, pollOptions, and pollVotes stores
+    Given the fixture "db-with-reversed-txid-references" is loaded
+
+  Scenario Outline: Repair txid encoding - 1 the repair utility corrects a reversed like reference
+    When the txid repair utility is run
+    Then the likes store maps like <likeTxid> to post <postTxid>
+    Then the postLikes store contains 1 entry whose key starts with <postTxid> and ends with <likeTxid>
+    Then the postLikes store contains 0 entry whose key starts with <reversedPostTxid> and ends with <likeTxid>
+
+    Examples:
+      | likeTxid | postTxid                                                         | reversedPostTxid                                                 |
+      | like-1   | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef | efcdab8967452301efcdab8967452301efcdab8967452301efcdab8967452301 |
+
+  Scenario Outline: Repair txid encoding - 2 the repair utility corrects a reversed reply reference
+    When the txid repair utility is run
+    Then the postParents store maps reply <replyTxid> to parent <postTxid>
+    Then the postChildren store contains 1 entry whose key starts with <postTxid> and ends with <replyTxid>
+    Then the postChildren store contains 0 entry whose key starts with <reversedPostTxid> and ends with <replyTxid>
+
+    Examples:
+      | replyTxid | postTxid                                                         | reversedPostTxid                                                 |
+      | reply-1   | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef | efcdab8967452301efcdab8967452301efcdab8967452301efcdab8967452301 |
+
+  Scenario Outline: Repair txid encoding - 3 the repair utility corrects reversed poll option and vote references
+    When the txid repair utility is run
+    Then the pollOptions store maps option <optionTxid> to poll <pollTxid>
+    Then the pollVotes store maps vote <voteTxid> to poll <pollTxid>
+
+    Examples:
+      | optionTxid | voteTxid | pollTxid                                                         |
+      | option-1   | vote-1   | 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff |
+
+  Scenario Outline: Repair txid encoding - 4 the repair utility leaves correctly-encoded references unchanged
+    When the txid repair utility is run
+    Then the likes store maps like <likeTxid> to post <postTxid>
+    Then the postParents store maps reply <replyTxid> to parent <postTxid>
+    Then the pollOptions store maps option <optionTxid> to poll <pollTxid>
+    Then the pollVotes store maps vote <voteTxid> to poll <pollTxid>
+
+    Examples:
+      | likeTxid | replyTxid | optionTxid | voteTxid | postTxid                                                         | pollTxid                                                         |
+      | like-2   | reply-2   | option-2   | vote-2   | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef | 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff |
+
+  Scenario Outline: Repair txid encoding - 5 the repair utility leaves an unknown reference unchanged
+    When the txid repair utility is run
+    Then the likes store maps like <likeTxid> to post <postTxid>
+
+    Examples:
+      | likeTxid | postTxid                                                         |
+      | like-3   | deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef |
+
+  Scenario Outline: Repair txid encoding - 6 the repair utility is idempotent
+    When the txid repair utility is run
+    And the txid repair utility is run again
+    Then the postLikes store contains 1 entry whose key starts with <postTxid> and ends with <likeTxid>
+    Then the postLikes store contains 0 entry whose key starts with <reversedPostTxid> and ends with <likeTxid>
+    Then the postChildren store contains 1 entry whose key starts with <postTxid> and ends with <replyTxid>
+    Then the postChildren store contains 0 entry whose key starts with <reversedPostTxid> and ends with <replyTxid>
+
+    Examples:
+      | likeTxid | replyTxid | postTxid                                                         | reversedPostTxid                                                 |
+      | like-1   | reply-1   | 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef | efcdab8967452301efcdab8967452301efcdab8967452301efcdab8967452301 |