feat(db)!: port DataAccess to the Notes integer schema

Notes.RootBlogName/NoteBlogName/Type became RootBlogId/NoteBlogId/TypeId
on 2026-08-07, resolved through the new BlogNames and NoteTypes tables.
There is no compatibility view, so every affected statement is a hard cut.

All 14 call sites in DataAccess.cs are ported:

- Notes->Blogs joins go through Blogs.BlogId in one integer hop; the
  Notes->Posts join in GetRepliesWithFilledText is the only one that must
  route through BlogNames, since Posts carries no BlogId
- AddNote registers both blog names and the note type with INSERT OR
  IGNORE before inserting, in one transaction committed before the console
  sleep. Registering the type matters: an unseen type would resolve to
  NULL and fail NOT NULL on TypeId, silently losing the note
- The LEFT JOIN Notes in GetPosts is dropped rather than translated. It
  selected nothing, could not remove a row, and its duplicates were
  collapsed by the query's own GROUP BY
- Duplicate-key detection moves to IsNotesDuplicateKey, matching the
  constraint and table instead of an exact column list. The old literal
  string is what broke on this rename
- EnsureReplyTextColumnExists drops DEFAULT '.', matching the migrated
  schema: new rows get NULL, not a placeholder nobody wrote

verify-db-schema.sql gains BlogNames, NoteTypes, Blogs.BlogId and the new
Notes columns, plus query 1d naming a pre-migration file and pointing at
normalize-notes.sql. Blogs.BlogId is deliberately not auto-fixable -- an
added-but-empty column makes engagement joins return zero rows silently.

Verified against the live 148 MB file: query plans hit the intended
indexes, and the BlogId join matches an independent name-resolved
formulation exactly on all 4,267 GetBlogs and 2,637 GetBlogsForLikes rows.

RolodexRepository.cs (16 sites) lives in the Rolodex repo and is not
covered here.

Co-Authored-By: Claude Opus 5 <[email protected]>

AGENTS.md

@@ -47,6 +47,36 @@ say nothing about the item being fetched, so they must not be recorded as per-it
 - Long-running commands return exit 3 when a pass ends incomplete (rate-limit pause, breaker trip, or
   skipped items), so a caller can distinguish that from a clean run
 
+### `Notes` Stores Integer IDs, Not Names
+As of 2026-08-07 `Notes.RootBlogName`, `NoteBlogName` and `Type` are gone, replaced by
+`RootBlogId`, `NoteBlogId` and `TypeId` resolving through the `BlogNames` and `NoteTypes`
+lookup tables. There is no compatibility view — naming an old column is a hard SQLite
+error, so unlike `IsActive` this is a hard cut with no runtime probe. Full detail in
+`URLNotesGrabberCORE/TL.db.md`.
+
+- **Joining `Notes` to `Blogs` goes through `Blogs.BlogId`**, not `BlogNames`:
+  `FROM Blogs B INNER JOIN Notes N ON N.NoteBlogId = B.BlogId`. Routing it through
+  `BlogNames` adds a hop and ends in the text comparison the migration removed
+- **Joining `Notes` to `Posts` is the opposite** — `Posts` has only `BlogName`, so it must
+  go through `BlogNames` (`GetRepliesWithFilledText`). This is the only such join
+- **Resolve a name by filtering the lookup, never by scanning `Notes`**:
+  `WHERE NoteBlogId = (SELECT BlogId FROM BlogNames WHERE BlogName = @name)`. The subquery
+  is a unique-index probe on 20k rows and does not show against the 1.18M-row table
+- **`AddNote` registers both blog names *and* the note type** with `INSERT OR IGNORE`
+  before inserting, all in one transaction. `NoteTypes` is a table rather than a `CHECK`
+  constraint precisely so an unseen type is an `INSERT`; without that registration it
+  would resolve to `NULL` and fail the `NOT NULL` on `TypeId`, losing the note
+- **`Blogs.BlogId` is NULL on 168,202 of 188,620 rows** — every blog that has never
+  appeared in a note. An inner join on it silently drops them. Correct for engagement
+  queries, wrong for anything listing the registry
+- **IDs are stable and must never be renumbered.** They are stored in 1.18M `Notes` rows.
+  A blog renamed upstream gets a new `BlogNames` row, not an edited one
+- Prefer `TypeId = (SELECT TypeId FROM NoteTypes WHERE Type = 'reply')` over a hardcoded
+  ID. A negated `TypeId NOT IN (SELECT …)` is only correct because `TypeId` is `NOT NULL`
+- Duplicate-key detection uses `IsNotesDuplicateKey`, which matches the constraint and the
+  table rather than an exact column list. The old literal string comparison broke silently
+  on this rename — do not reintroduce one
+
 ### `IsActive` Is Not Ours To Write
 `Blogs.IsActive`, `Posts.IsActive` and `Notes.IsActive` are removal flags set by other tools
 (Rolodex). `0` means removed; anything else, including `NULL`, means live. Full detail in

URLNotesGrabberCORE/DataAccess.cs

@@ -213,6 +213,59 @@ namespace URLNotesGrabberCORE
 
         #endregion IsActive
 
+        #region Notes integer schema
+
+        // Notes stopped storing names on 2026-08-07: RootBlogName/NoteBlogName/Type became
+        // RootBlogId/NoteBlogId/TypeId, resolved through BlogNames and NoteTypes. There is no
+        // compatibility view -- a query naming an old column fails outright, so this is a hard
+        // cut rather than an optional column like IsActive. See TL.db.md.
+        //
+        // Two shapes recur below and are spelled out inline rather than hidden behind a helper,
+        // so that every statement reads as the SQL it actually runs:
+        //   (SELECT BlogId FROM BlogNames WHERE BlogName = @name)   -- unique-index probe, 20k rows
+        //   (SELECT TypeId FROM NoteTypes WHERE Type = 'reply')     -- 5 rows, effectively free
+        // Joining Notes to Blogs is the one case that must NOT route through BlogNames: Blogs
+        // carries its own BlogId, so N.NoteBlogId = B.BlogId is a single integer hop. Joining
+        // Notes to Posts is the opposite case -- Posts has only BlogName, so it has to go
+        // through BlogNames.
+
+        /// <summary>
+        /// True when the exception is a duplicate-key collision on Notes. The message embeds the
+        /// primary key's column names, which the integer migration renamed, so this matches on the
+        /// constraint and the table instead of on an exact column list -- a literal comparison
+        /// silently inverts into "log every error" the next time a column is renamed.
+        /// </summary>
+        private static bool IsNotesDuplicateKey(Exception ex)
+        {
+            return ex.Message.Contains("UNIQUE constraint failed", StringComparison.OrdinalIgnoreCase)
+                && ex.Message.Contains("Notes.", StringComparison.OrdinalIgnoreCase);
+        }
+
+        /// <summary>
+        /// Gives a blog name an ID if it does not have one. No read-back and no round trip -- a
+        /// name that is already registered keeps the ID that 1.18M Notes rows point at.
+        /// </summary>
+        private static void RegisterBlogName(SQLiteConnection connection, SQLiteTransaction? transaction, string blogName)
+        {
+            using SQLiteCommand command = new SQLiteCommand("INSERT OR IGNORE INTO BlogNames (BlogName) VALUES (@BlogName)", connection, transaction);
+            command.Parameters.AddWithValue("@BlogName", blogName);
+            command.ExecuteNonQuery();
+        }
+
+        /// <summary>
+        /// Same, for a note type. NoteTypes is a table rather than a CHECK constraint precisely so
+        /// that a type this crawler has not seen before is an INSERT and not a schema migration --
+        /// without this the type would resolve to NULL and fail the NOT NULL on Notes.TypeId.
+        /// </summary>
+        private static void RegisterNoteType(SQLiteConnection connection, SQLiteTransaction? transaction, string type)
+        {
+            using SQLiteCommand command = new SQLiteCommand("INSERT OR IGNORE INTO NoteTypes (Type) VALUES (@Type)", connection, transaction);
+            command.Parameters.AddWithValue("@Type", type);
+            command.ExecuteNonQuery();
+        }
+
+        #endregion Notes integer schema
+
         public static string Q(string input)
         {
             return "'" + input.Replace("'", "''") + "'";
@@ -371,7 +424,10 @@ namespace URLNotesGrabberCORE
                             connection.Close();
                             connection.Open();
 
-                            string addColumnSql = "ALTER TABLE Notes ADD COLUMN replyText TEXT DEFAULT '.';";
+                            // No column default: the migrated schema dropped the DEFAULT '.' that
+                            // is how 1.1M rows acquired a placeholder nobody wrote. New rows get
+                            // NULL, which every reader here already treats as "no reply text".
+                            string addColumnSql = "ALTER TABLE Notes ADD COLUMN replyText TEXT;";
                             using (SQLiteCommand addCommand = new SQLiteCommand(addColumnSql, connection))
                             {
                                 addCommand.ExecuteNonQuery();
@@ -703,15 +759,34 @@ namespace URLNotesGrabberCORE
             try { AddBlog(noteBlogName, false, DBPath); } catch { }
 
             using SQLiteConnection connection2 = new SQLiteConnection("Data Source=" + DBPath);
+            int rowsInserted = 0;
 
             try
             {
                 connection2.Open();
 
+                // Notes stores integer IDs, so both participants and the type have to exist in
+                // their lookup table before the note can point at them.
+                //
+                // All four statements run in one transaction so a crash cannot leave a name or a
+                // type registered with no note. The transaction is committed before the console
+                // output below, which sleeps -- a write lock must not be held across that.
+                using (SQLiteTransaction transaction = connection2.BeginTransaction())
+                {
+                    RegisterBlogName(connection2, transaction, rootBlogName);
+                    RegisterBlogName(connection2, transaction, noteBlogName);
+                    RegisterNoteType(connection2, transaction, type ?? string.Empty);
+
                     // INSERT OR IGNORE, and no IsActive in the column list: re-crawling a note
                     // that was removed elsewhere leaves the existing row -- and its flag -- alone.
-                string sql = "INSERT OR IGNORE INTO Notes (rootBlogName, noteBlogName, PostID, TimeStamp, Type, DatetimeCrawled, DateModified, DateCreated) values(@rootBlogName, @noteBlogName, @PostID, @TimeStamp, @Type, @DatetimeCrawled, @DateModified, @DateCreated)";
-                using (SQLiteCommand command = new SQLiteCommand(sql, connection2))
+                    string sql = "INSERT OR IGNORE INTO Notes (RootBlogId, NoteBlogId, PostID, TimeStamp, TypeId, DatetimeCrawled, DateModified, DateCreated) " +
+                                 "SELECT (SELECT BlogId FROM BlogNames WHERE BlogName = @rootBlogName), " +
+                                 "       (SELECT BlogId FROM BlogNames WHERE BlogName = @noteBlogName), " +
+                                 "       @PostID, @TimeStamp, " +
+                                 "       (SELECT TypeId FROM NoteTypes WHERE Type = @Type), " +
+                                 "       @DatetimeCrawled, @DateModified, @DateCreated";
+
+                    using (SQLiteCommand command = new SQLiteCommand(sql, connection2, transaction))
                     {
                         command.Parameters.AddWithValue("@rootBlogName", rootBlogName);
                         command.Parameters.AddWithValue("@noteBlogName", noteBlogName);
@@ -722,7 +797,11 @@ namespace URLNotesGrabberCORE
                         command.Parameters.AddWithValue("@DateModified", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
                         command.Parameters.AddWithValue("@DateCreated", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
 
-                    int rowsInserted = command.ExecuteNonQuery();
+                        rowsInserted = command.ExecuteNonQuery();
+                    }
+
+                    transaction.Commit();
+                }
 
                 if (rowsInserted == 1)
                 {
@@ -755,11 +834,10 @@ namespace URLNotesGrabberCORE
                     catch { }
                 }
             }
-            }
             catch (Exception ex)
             {
                 // Breakpoint here
-                if (ex.Message != "constraint failed\r\nUNIQUE constraint failed: Notes.RootBlogName, Notes.PostID, Notes.TimeStamp, Notes.Type, Notes.NoteBlogName")
+                if (!IsNotesDuplicateKey(ex))
                 {
                     Console.WriteLine(ex.Message);
                     Console.WriteLine("^^^^^ - SHORTCUT");
@@ -850,6 +928,10 @@ namespace URLNotesGrabberCORE
                 }
                 else
                 {
+                    // The LEFT OUTER JOIN to Notes that used to sit here has been dropped rather
+                    // than ported. Nothing was selected from it, a LEFT JOIN cannot remove a row,
+                    // and the GROUP BY below collapsed the rows it duplicated -- so it could not
+                    // affect the result, and it cost a join against 1.18M rows on every pass.
                     sql = "SELECT " +
                                  "  MAX(Posts.BlogName) as BlogName, " + Environment.NewLine +
                                  "  Posts.PostID, " + Environment.NewLine +
@@ -859,8 +941,6 @@ namespace URLNotesGrabberCORE
                                  "FROM " + Environment.NewLine +
                                  "   Posts " + Environment.NewLine +
                                  "      LEFT OUTER JOIN " + Environment.NewLine +
-                                 "   Notes ON Notes.RootBlogName = Posts.BlogName AND Notes.PostID = Posts.PostID " + Environment.NewLine +
-                                 "      LEFT OUTER JOIN " + Environment.NewLine +
                                  "   (      select BlogName, count(PostID) as CNT from Posts" + WhereIsActive("Posts", "", DBPath) + " group by BlogName)  CNT on CNT.blogName = Posts.BlogName " +
                                  "WHERE NotFound = 0 " + AndIsActive("Posts", "Posts", DBPath) + Environment.NewLine;
 
@@ -971,7 +1051,11 @@ namespace URLNotesGrabberCORE
             {
                 connection.Open();
 
-                string sql = "SELECT	distinct RootBlogName as blogName, postID FROM Notes WHERE Notes.type = 'reply'" + AndIsActive("Notes", "Notes", DBPath) + " order by RootBlogName, PostID";
+                string sql = "SELECT DISTINCT BN.BlogName as blogName, N.PostID" +
+                             " FROM Notes N" +
+                             " INNER JOIN BlogNames BN ON BN.BlogId = N.RootBlogId" +
+                             " WHERE N.TypeId = (SELECT TypeId FROM NoteTypes WHERE Type = 'reply')" + AndIsActive("Notes", "N", DBPath) +
+                             " ORDER BY BN.BlogName, N.PostID";
 
                 using (SQLiteCommand command = new SQLiteCommand(sql, connection))
                 {
@@ -1011,12 +1095,15 @@ namespace URLNotesGrabberCORE
             {
                 connection.Open();
 
-                string sql = @"SELECT DISTINCT Notes.RootBlogName as blogName, Notes.PostID,
-                             MAX(Notes.timestamp) as LatestTimestamp
-                             FROM Notes 
-                             WHERE Notes.type = 'reply'
-                             AND (Notes.replyText IS NULL OR Notes.replyText = '' OR Notes.replyText = '.')" + AndIsActive("Notes", "Notes", DBPath) + @"
-                             GROUP BY Notes.RootBlogName, Notes.PostID
+                // Grouped on the integer rather than the name: the group key is what gets sorted,
+                // and BN.BlogName comes along for free off the join.
+                string sql = @"SELECT BN.BlogName as blogName, N.PostID,
+                             MAX(N.TimeStamp) as LatestTimestamp
+                             FROM Notes N
+                             INNER JOIN BlogNames BN ON BN.BlogId = N.RootBlogId
+                             WHERE N.TypeId = (SELECT TypeId FROM NoteTypes WHERE Type = 'reply')
+                             AND (N.replyText IS NULL OR N.replyText = '' OR N.replyText = '.')" + AndIsActive("Notes", "N", DBPath) + @"
+                             GROUP BY N.RootBlogId, N.PostID
                              ORDER BY LatestTimestamp ASC
                              LIMIT @limit";
 
@@ -1058,11 +1145,15 @@ namespace URLNotesGrabberCORE
             {
                 connection.Open();
 
-                string sql = @"SELECT DISTINCT P.BlogName, P.PostID, MAX(N.timestamp) as LatestTimestamp
+                // Posts carries only BlogName, so this is the one join to Notes that has to go
+                // through BlogNames -- there is no Posts.BlogId to hop on. The name predicate is
+                // pushed into the 20k-row lookup, which then feeds integers to the Notes key.
+                string sql = @"SELECT DISTINCT P.BlogName, P.PostID, MAX(N.TimeStamp) as LatestTimestamp
                               FROM Posts P
-                              INNER JOIN Notes N ON N.PostID = P.PostID AND N.RootBlogName = P.BlogName
+                              INNER JOIN BlogNames RBN ON RBN.BlogName = P.BlogName
+                              INNER JOIN Notes N ON N.RootBlogId = RBN.BlogId AND N.PostID = P.PostID
                               WHERE P.NotFound = 0
-                                AND N.type = 'reply'
+                                AND N.TypeId = (SELECT TypeId FROM NoteTypes WHERE Type = 'reply')
                                 AND (N.replyText IS NULL OR N.replyText = '' OR N.replyText = '.')" + AndIsActive("Posts", "P", DBPath) + AndIsActive("Notes", "N", DBPath) + @"
                               GROUP BY P.BlogName, P.PostID
                               ORDER BY LatestTimestamp ASC";
@@ -1160,6 +1251,11 @@ namespace URLNotesGrabberCORE
             {
                 connection.Open();
                 string sql;
+
+                // The two Notes branches below join on Blogs.BlogId, which is NULL for the 168k
+                // registry rows that have never appeared in a note. The inner join drops them,
+                // which is correct here -- both branches already require a note to exist -- but
+                // it is the wrong shape for anything that lists the registry.
                 if (!string.IsNullOrEmpty(specificBlog))
                 {
                     // Specific blog: always process, bypass cooldown
@@ -1179,12 +1275,12 @@ namespace URLNotesGrabberCORE
                                    COALESCE(B.LikesCursor, 0),
                                    COALESCE(B.LikesNewestTimestamp, 0)
                               FROM Blogs B
-                              INNER JOIN Notes N ON N.NoteBlogName = B.BlogName
+                              INNER JOIN Notes N ON N.NoteBlogId = B.BlogId
                              WHERE N.TimeStamp >= 1535778000
-                               AND N.rootBlogName = B.BlogName
+                               AND N.RootBlogId = B.BlogId
                                AND B.IsActive = 1" + AndIsActive("Notes", "N", DBPath) + @"
                              GROUP BY B.BlogName
-                             ORDER BY MIN(N.Timestamp);";
+                             ORDER BY MIN(N.TimeStamp);";
                 }
                 else
                 {
@@ -1194,9 +1290,9 @@ namespace URLNotesGrabberCORE
                                    COALESCE(B.LikesCursor, 0),
                                    COALESCE(B.LikesNewestTimestamp, 0)
                               FROM Blogs B
-                              INNER JOIN Notes N ON N.NoteBlogName = B.BlogName
+                              INNER JOIN Notes N ON N.NoteBlogId = B.BlogId
                              WHERE N.TimeStamp >= 1535778000
-                               AND N.rootBlogName = B.BlogName
+                               AND N.RootBlogId = B.BlogId
                                AND B.IsActive = 1" + AndIsActive("Notes", "N", DBPath) + @"
                                AND (
                                     B.LikesPulled = 0
@@ -1204,7 +1300,7 @@ namespace URLNotesGrabberCORE
                                     < (CAST(strftime('%s','now') AS INTEGER) - (@cooldownDays * 86400))
                                )
                              GROUP BY B.BlogName
-                             ORDER BY MIN(N.Timestamp);";
+                             ORDER BY MIN(N.TimeStamp);";
                 }
 
                 using (SQLiteCommand command = new SQLiteCommand(sql, connection))
@@ -1244,11 +1340,14 @@ namespace URLNotesGrabberCORE
             try
             {
                 connection.Open();
+                // Blogs is reached in one integer hop off Blogs.BlogId, not through BlogNames --
+                // that would add a hop and end in the text comparison the migration removed.
+                // The negated form is only correct because Notes.TypeId is NOT NULL.
                 string sql = "";
                 if (reblogsOnly)
-                    sql = "SELECT NoteBlogName as blogName, count(*) FROM notes INNER JOIN blogs ON blogs.BlogName = notes.NoteBlogName WHERE blogs.IsActive = @isActive" + AndIsActive("Notes", "notes", DBPath) + " AND type IN ('reblog', 'reply', 'posted') AND HasBeenOutput = 0 GROUP BY NoteBlogName ORDER BY count(*) DESC, BlogName LIMIT @top";
+                    sql = "SELECT B.BlogName as blogName, count(*) FROM Notes N INNER JOIN Blogs B ON B.BlogId = N.NoteBlogId WHERE B.IsActive = @isActive" + AndIsActive("Notes", "N", DBPath) + " AND N.TypeId IN (SELECT TypeId FROM NoteTypes WHERE Type IN ('reblog', 'reply', 'posted')) AND B.HasBeenOutput = 0 GROUP BY N.NoteBlogId ORDER BY count(*) DESC, B.BlogName LIMIT @top";
                 else
-                    sql = "SELECT NoteBlogName as blogName, count(*) FROM notes INNER JOIN blogs ON blogs.BlogName = notes.NoteBlogName WHERE blogs.IsActive = @isActive" + AndIsActive("Notes", "notes", DBPath) + " AND type NOT IN ('reblog', 'reply', 'posted') AND HasBeenOutput = 0 GROUP BY NoteBlogName ORDER BY count(*) DESC, BlogName LIMIT @top";
+                    sql = "SELECT B.BlogName as blogName, count(*) FROM Notes N INNER JOIN Blogs B ON B.BlogId = N.NoteBlogId WHERE B.IsActive = @isActive" + AndIsActive("Notes", "N", DBPath) + " AND N.TypeId NOT IN (SELECT TypeId FROM NoteTypes WHERE Type IN ('reblog', 'reply', 'posted')) AND B.HasBeenOutput = 0 GROUP BY N.NoteBlogId ORDER BY count(*) DESC, B.BlogName LIMIT @top";
 
                 using (SQLiteCommand command = new SQLiteCommand(sql, connection))
                 {
@@ -1287,9 +1386,9 @@ namespace URLNotesGrabberCORE
                 connection.Open();
                 string sql = "";
                 if (reblogsOnly)
-                    sql = "SELECT NoteBlogName as blogName, count(*) FROM notes INNER JOIN blogs ON blogs.BlogName = notes.NoteBlogName WHERE blogs.IsActive = @isActive" + AndIsActive("Notes", "notes", DBPath) + " AND type IN ('reblog', 'reply', 'posted') AND HasBeenOutput = 0 GROUP BY NoteBlogName ORDER BY count(*) DESC, BlogName LIMIT @top";
+                    sql = "SELECT B.BlogName as blogName, count(*) FROM Notes N INNER JOIN Blogs B ON B.BlogId = N.NoteBlogId WHERE B.IsActive = @isActive" + AndIsActive("Notes", "N", DBPath) + " AND N.TypeId IN (SELECT TypeId FROM NoteTypes WHERE Type IN ('reblog', 'reply', 'posted')) AND B.HasBeenOutput = 0 GROUP BY N.NoteBlogId ORDER BY count(*) DESC, B.BlogName LIMIT @top";
                 else
-                    sql = "SELECT NoteBlogName as blogName, count(*) FROM notes INNER JOIN blogs ON blogs.BlogName = notes.NoteBlogName WHERE blogs.IsActive = @isActive" + AndIsActive("Notes", "notes", DBPath) + " AND HasBeenOutput = 0 GROUP BY NoteBlogName ORDER BY count(*) DESC, BlogName LIMIT @top";
+                    sql = "SELECT B.BlogName as blogName, count(*) FROM Notes N INNER JOIN Blogs B ON B.BlogId = N.NoteBlogId WHERE B.IsActive = @isActive" + AndIsActive("Notes", "N", DBPath) + " AND B.HasBeenOutput = 0 GROUP BY N.NoteBlogId ORDER BY count(*) DESC, B.BlogName LIMIT @top";
 
                 using (SQLiteCommand command = new SQLiteCommand(sql, connection))
                 {
@@ -1528,7 +1627,10 @@ namespace URLNotesGrabberCORE
             {
                 connection.Open();
 
-                string sql = "UPDATE Notes SET timestamp = @timestamp, DateModified = @dateModified WHERE rootBlogName = @rootBlogName AND noteBlogName = @noteBlogName AND PostID = @postID AND IFNULL(timestamp, 0) <> @timestamp";
+                string sql = "UPDATE Notes SET TimeStamp = @timestamp, DateModified = @dateModified " +
+                             "WHERE RootBlogId = (SELECT BlogId FROM BlogNames WHERE BlogName = @rootBlogName) " +
+                             "AND NoteBlogId = (SELECT BlogId FROM BlogNames WHERE BlogName = @noteBlogName) " +
+                             "AND PostID = @postID AND IFNULL(TimeStamp, 0) <> @timestamp";
                 using (SQLiteCommand command = new SQLiteCommand(sql, connection))
                 {
                     command.Parameters.AddWithValue("@timestamp", timestamp);
@@ -1542,7 +1644,7 @@ namespace URLNotesGrabberCORE
             catch (Exception ex)
             {
                 // Breakpoint here
-                if (ex.Message != "constraint failed\r\nUNIQUE constraint failed: Notes.RootBlogName, Notes.PostID, Notes.TimeStamp, Notes.Type, Notes.NoteBlogName")
+                if (!IsNotesDuplicateKey(ex))
                 {
                     Console.WriteLine(ex.Message);
                     Console.WriteLine("^^^^^ - SHORTCUT");
@@ -1828,10 +1930,15 @@ namespace URLNotesGrabberCORE
             {
                 connection.Open();
 
-                //string sql = "UPDATE Notes SET replyText = @replyText WHERE rootBlogName = @rootBlogName AND PostID = @PostID AND noteBlogName = @noteBlogName AND TimeStamp = @TimeStamp AND Type = 'reply'";
                 // Match on (noteBlogName, TimeStamp ±5s) only - a reply by a given blog at a given timestamp is the same reply across the original post and every reblog of it, so this fans out across reblog chains in one shot. Tolerance absorbs the ~1s drift between what -collect stored and what mode=conversation returns now.
                 // Only fan out to rows that match the SELECT criteria in GetRepliesWithFilledText (NULL/empty/legacy-'.'). Never overwrite '?' (confirmed-empty) or already-fetched text.
-                string sql = "UPDATE Notes SET replyText = @replyText, DateModified = @dateModified WHERE noteBlogName = @noteBlogName AND ABS(TimeStamp - @TimeStamp) <= 5 AND Type = 'reply' AND (replyText IS NULL OR replyText = '' OR replyText = '.') AND (replyText IS NULL OR replyText <> @replyText)";
+                // The ABS() term cannot use an index on TimeStamp, before or after the integer schema; the NoteBlogId probe is what keeps this off a full scan.
+                string sql = "UPDATE Notes SET replyText = @replyText, DateModified = @dateModified " +
+                             "WHERE NoteBlogId = (SELECT BlogId FROM BlogNames WHERE BlogName = @noteBlogName) " +
+                             "AND ABS(TimeStamp - @TimeStamp) <= 5 " +
+                             "AND TypeId = (SELECT TypeId FROM NoteTypes WHERE Type = 'reply') " +
+                             "AND (replyText IS NULL OR replyText = '' OR replyText = '.') " +
+                             "AND (replyText IS NULL OR replyText <> @replyText)";
                 using (SQLiteCommand command = new SQLiteCommand(sql, connection))
                 {
                     command.Parameters.AddWithValue("@replyText", replyText ?? "?");
@@ -1872,7 +1979,11 @@ namespace URLNotesGrabberCORE
             {
                 connection.Open();
 
-                string sql = "UPDATE Notes SET replyText = @replyText, DateModified = @dateModified WHERE rootBlogName = @rootBlogName AND PostID = @PostID AND Type = 'reply' AND IFNULL(replyText, '.') <> @replyText";
+                string sql = "UPDATE Notes SET replyText = @replyText, DateModified = @dateModified " +
+                             "WHERE RootBlogId = (SELECT BlogId FROM BlogNames WHERE BlogName = @rootBlogName) " +
+                             "AND PostID = @PostID " +
+                             "AND TypeId = (SELECT TypeId FROM NoteTypes WHERE Type = 'reply') " +
+                             "AND IFNULL(replyText, '.') <> @replyText";
                 using (SQLiteCommand command = new SQLiteCommand(sql, connection))
                 {
                     command.Parameters.AddWithValue("@replyText", replyText ?? ".");

URLNotesGrabberCORE/TL.db.md

@@ -313,9 +313,17 @@ code to this table's contents, so prefer the join in anything long-lived.
 
 ## Porting to the integer schema
 
-Everything here was checked against the live 148 MB file. There are roughly 14 affected
-call sites in `DataAccess.cs` and 16 in `RolodexRepository.cs`. TumblThree needs no
-changes — its single statement touches `Blogs.IsActive` and `BlogName` only.
+Everything here was checked against the live 148 MB file. There were 14 affected call
+sites in `DataAccess.cs` and 16 in `RolodexRepository.cs`. TumblThree needs no changes —
+its single statement touches `Blogs.IsActive` and `BlogName` only.
+
+**`DataAccess.cs` is ported.** All 14 sites now read the integer schema, `AddNote`
+registers names and types before inserting, and `verify-db-schema.sql` reports a
+pre-migration file rather than letting the app fail on it. `RolodexRepository.cs` lives in
+the [Rolodex](https://git.basso.land/jim/Rolodex) repository and is not covered by that
+work. One site was dropped rather than translated: the `LEFT JOIN Notes` in `GetPosts`
+selected nothing and was collapsed by the query's own `GROUP BY`, so it could not affect
+the result.
 
 ### Column mapping
 
@@ -426,7 +434,11 @@ UNIQUE constraint failed: Notes.RootBlogName, Notes.PostID, Notes.TimeStamp, Not
 
 at two call sites to decide whether to swallow an exception. SQLite now emits the *new*
 column names, so those comparisons no longer match and real errors will surface where
-they used to be silently ignored — or vice versa. Both sites need updating.
+they used to be silently ignored — or vice versa.
+
+Both sites now go through `IsNotesDuplicateKey` in `DataAccess.cs`, which matches on
+`UNIQUE constraint failed` plus `Notes.` rather than on the column list. A literal
+comparison is what broke here; the next rename should not break it again.
 
 ### Updating notes
 
@@ -526,7 +538,7 @@ Crawler bookkeeping. Rolodex ignores all of these.
 `DataAccess.cs` joins on it to decide what to collect:
 
 ```sql
--- as it will read after the integer-schema port; see the porting guide above
+-- shape only; the ported GetBlogs joins Blogs directly on BlogId and needs no BlogNames hop
 SELECT bn.BlogName, count(*)
   FROM Notes n
   JOIN Blogs     b  ON b.BlogId  = n.NoteBlogId

verify-db-schema.sql

@@ -79,18 +79,35 @@ WITH expected(tbl, col, alter_stmt) AS (
     ('Blogs','LikesLastRefreshed',    'ALTER TABLE Blogs ADD COLUMN LikesLastRefreshed INTEGER DEFAULT 0;'),
     ('Blogs','LikesLastNewCount',     'ALTER TABLE Blogs ADD COLUMN LikesLastNewCount INTEGER DEFAULT 0;'),
     ('Blogs','TTFolderPath',          'ALTER TABLE Blogs ADD COLUMN TTFolderPath TEXT;'),
+    -- Blogs.BlogId (2026-08-07) is the single-hop join key into Notes. Deliberately NOT
+    -- auto-fixable: an added-but-empty BlogId makes every engagement join return zero
+    -- rows silently, which is worse than the hard error a missing column gives.
+    ('Blogs','BlogId',                'MANUAL REVIEW - see query 1d: run normalize-notes.sql'),
 
     -- Notes (base columns: manual review if missing)
-    ('Notes','RootBlogName',          'MANUAL REVIEW - base/PK column missing'),
+    -- Integer IDs since 2026-08-07. RootBlogName/NoteBlogName/Type are GONE, not renamed
+    -- in place -- a backup that still has them needs normalize-notes.sql, not an ALTER.
+    -- Query 1d below reports exactly that case.
+    ('Notes','RootBlogId',            'MANUAL REVIEW - see query 1d: pre-2026-08-07 name schema, or damaged'),
     ('Notes','PostID',                'MANUAL REVIEW - base/PK column missing'),
-    ('Notes','NoteBlogName',          'MANUAL REVIEW - base/PK column missing'),
+    ('Notes','NoteBlogId',            'MANUAL REVIEW - see query 1d: pre-2026-08-07 name schema, or damaged'),
     ('Notes','TimeStamp',             'MANUAL REVIEW - base/PK column missing'),
-    ('Notes','Type',                  'MANUAL REVIEW - base/PK column missing'),
+    ('Notes','TypeId',                'MANUAL REVIEW - see query 1d: pre-2026-08-07 name schema, or damaged'),
     ('Notes','DatetimeCrawled',       'MANUAL REVIEW - base column missing'),
     ('Notes','DateModified',          'MANUAL REVIEW - base column missing'),
     ('Notes','DateCreated',           'MANUAL REVIEW - base column missing'),
     -- Notes (additive migration column, auto-fixable)
-    ('Notes','replyText',             'ALTER TABLE Notes ADD COLUMN replyText TEXT DEFAULT ''.'';'),
+    -- No DEFAULT: the migrated schema dropped it, so new rows get NULL rather than a
+    -- placeholder. EnsureReplyTextColumnExists in DataAccess.cs adds it the same way.
+    ('Notes','replyText',             'ALTER TABLE Notes ADD COLUMN replyText TEXT;'),
+
+    -- BlogNames / NoteTypes (the lookup tables Notes resolves its IDs through, 2026-08-07).
+    -- Not auto-fixable: an empty BlogNames does not mean "add the table", it means the
+    -- Notes rows have nothing to resolve against. Rebuild with normalize-notes.sql.
+    ('BlogNames','BlogId',            'MANUAL REVIEW - see query 1d: run normalize-notes.sql'),
+    ('BlogNames','BlogName',          'MANUAL REVIEW - see query 1d: run normalize-notes.sql'),
+    ('NoteTypes','TypeId',            'MANUAL REVIEW - see query 1d: run normalize-notes.sql'),
+    ('NoteTypes','Type',              'MANUAL REVIEW - see query 1d: run normalize-notes.sql'),
 
     -- DailyAPICount (base columns)
     ('DailyAPICount','Date',          'MANUAL REVIEW - base/PK column missing'),
@@ -106,6 +123,8 @@ actual(tbl, col) AS (
   SELECT 'Posts',           name FROM pragma_table_info('Posts')
   UNION ALL SELECT 'Blogs',           name FROM pragma_table_info('Blogs')
   UNION ALL SELECT 'Notes',           name FROM pragma_table_info('Notes')
+  UNION ALL SELECT 'BlogNames',       name FROM pragma_table_info('BlogNames')
+  UNION ALL SELECT 'NoteTypes',       name FROM pragma_table_info('NoteTypes')
   UNION ALL SELECT 'DailyAPICount',   name FROM pragma_table_info('DailyAPICount')
   UNION ALL SELECT 'ApiKeyPoolState', name FROM pragma_table_info('ApiKeyPoolState')
   UNION ALL SELECT 'ApiKeyPoolMeta',  name FROM pragma_table_info('ApiKeyPoolMeta')
@@ -127,7 +146,7 @@ ORDER BY (e.alter_stmt LIKE 'ALTER%') DESC, e.tbl, e.col;
 -- 1b. MISSING TABLES: expected tables that don't exist at all in this DB.
 --     Zero rows = good.
 WITH expected_tables(tbl) AS (
-  VALUES ('Posts'),('Blogs'),('Notes'),('DailyAPICount'),
+  VALUES ('Posts'),('Blogs'),('Notes'),('BlogNames'),('NoteTypes'),('DailyAPICount'),
          ('ApiKeyPoolState'),('ApiKeyPoolMeta')
 )
 SELECT et.tbl AS missing_table
@@ -157,10 +176,12 @@ WITH expected(tbl, col) AS (
     ('Blogs','BlogName'),('Blogs','HasBeenOutput'),('Blogs','IsActive'),('Blogs','DateAdded'),
     ('Blogs','ByLikes'),('Blogs','DateModified'),('Blogs','DateCreated'),('Blogs','LikesPulled'),
     ('Blogs','LikesCursor'),('Blogs','LikesNewestTimestamp'),('Blogs','LikesLastRefreshed'),
-    ('Blogs','LikesLastNewCount'),('Blogs','TTFolderPath'),
-    ('Notes','RootBlogName'),('Notes','PostID'),('Notes','NoteBlogName'),('Notes','TimeStamp'),
-    ('Notes','Type'),('Notes','DatetimeCrawled'),('Notes','DateModified'),('Notes','DateCreated'),
+    ('Blogs','LikesLastNewCount'),('Blogs','TTFolderPath'),('Blogs','BlogId'),
+    ('Notes','RootBlogId'),('Notes','PostID'),('Notes','NoteBlogId'),('Notes','TimeStamp'),
+    ('Notes','TypeId'),('Notes','DatetimeCrawled'),('Notes','DateModified'),('Notes','DateCreated'),
     ('Notes','replyText'),('Notes','IsActive'),
+    ('BlogNames','BlogId'),('BlogNames','BlogName'),
+    ('NoteTypes','TypeId'),('NoteTypes','Type'),
     ('DailyAPICount','Date'),('DailyAPICount','APICount'),
     ('ApiKeyPoolState','KeyName'),('ApiKeyPoolState','RetryUntil'),
     ('ApiKeyPoolMeta','Id'),('ApiKeyPoolMeta','LastIndex')
@@ -169,6 +190,8 @@ actual(tbl, col) AS (
   SELECT 'Posts',           name FROM pragma_table_info('Posts')
   UNION ALL SELECT 'Blogs',           name FROM pragma_table_info('Blogs')
   UNION ALL SELECT 'Notes',           name FROM pragma_table_info('Notes')
+  UNION ALL SELECT 'BlogNames',       name FROM pragma_table_info('BlogNames')
+  UNION ALL SELECT 'NoteTypes',       name FROM pragma_table_info('NoteTypes')
   UNION ALL SELECT 'DailyAPICount',   name FROM pragma_table_info('DailyAPICount')
   UNION ALL SELECT 'ApiKeyPoolState', name FROM pragma_table_info('ApiKeyPoolState')
   UNION ALL SELECT 'ApiKeyPoolMeta',  name FROM pragma_table_info('ApiKeyPoolMeta')
@@ -181,6 +204,25 @@ WHERE e.col IS NULL
 ORDER BY a.tbl, a.col;
 
 
+-- 1d. PRE-MIGRATION DATABASE: a backup from before 2026-08-07, when Notes still
+--     stored names. Zero rows = good.
+--
+--     This is the one failure SECTION 2 cannot fix. Notes.RootBlogName /
+--     NoteBlogName / Type were replaced by RootBlogId / NoteBlogId / TypeId
+--     resolving through BlogNames and NoteTypes -- a data migration, not an
+--     ADD COLUMN. There is no compatibility view, so the current code fails
+--     outright ("no such column: RootBlogId") against such a file.
+--
+--     Fix: run normalize-notes.sql against a COPY of the backup, then re-run
+--     SECTION 1. Do not hand-add the ID columns: they would be empty, and an
+--     empty NoteBlogId is indistinguishable from a note by blog #0.
+SELECT 'Notes still stores names -- run normalize-notes.sql on a copy' AS pre_migration_schema,
+       group_concat(name, ', ')                                        AS legacy_columns_found
+FROM pragma_table_info('Notes')
+WHERE lower(name) IN ('rootblogname','noteblogname','type')
+HAVING COUNT(*) > 0;
+
+
 -- ============================================================================
 -- SECTION 2  --  FIX (opt-in, additive only)
 --
@@ -190,6 +232,9 @@ ORDER BY a.tbl, a.col;
 -- "duplicate column name" error and changes nothing -- just run the flagged
 -- subset. These are the 8 additive migration columns and nothing else; the
 -- likes high-water-mark reset is intentionally NOT included.
+--
+-- Nothing here addresses query 1d. The Notes integer schema is a data migration
+-- (normalize-notes.sql) and cannot be reached by adding columns.
 -- ============================================================================
 
 -- ALTER TABLE Posts ADD COLUMN PostType TEXT;
@@ -199,4 +244,4 @@ ORDER BY a.tbl, a.col;
 -- ALTER TABLE Blogs ADD COLUMN LikesLastRefreshed INTEGER DEFAULT 0;
 -- ALTER TABLE Blogs ADD COLUMN LikesLastNewCount INTEGER DEFAULT 0;
 -- ALTER TABLE Blogs ADD COLUMN TTFolderPath TEXT;
--- ALTER TABLE Notes ADD COLUMN replyText TEXT DEFAULT '.';
+-- ALTER TABLE Notes ADD COLUMN replyText TEXT;