Dumps and init files from before 0.0.4 load no more of their old tag formats, and three orphan test scripts go

A2: a restored pane's tag tail comes from the dump's tag_tail, which every dump since 0.0.4 writes; the 27 earlier default tails that were recognised to upgrade, restoreTail, tailClass, savedPrefix and restoreTailAt, pdf_view's and image's legacySavedPrefix, a terminal's TTY tag prefix and its raw output tail replay, and the ThemeSel, FontSel and ColumnTags words (init lines and dumped output names) go, with their tests; the CHANGELOG says so. A4: test/fs_soak.py, referenced nowhere (monkey9p.py does its work). A6: test/column_grip.py and test/look_placement.py, referenced nowhere; the six review scripts docs/ui-review.md names stay.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

14 files changed, 16 insertions, 981 deletions

diff --git a/src/CHANGELOG.md b/src/CHANGELOG.md
index 50149551..a2f493df 100644
--- a/src/CHANGELOG.md
+++ b/src/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## Unreleased
+
+- Dumps and init files from before 0.0.4 no longer load their old tag
+  formats: a restored pane's tag tail is read only from `tag_tail`, and an old
+  terminal's `TTY` tag or raw output tail is not replayed. `ThemeSel`,
+  `FontSel` and `ColumnTags` are no longer recognised in init files or dumps
+  (`Themes` and `Fonts` are the words).
+
 ## 0.0.5
 
 - Over a slow link the terminal build keeps at most one frame in flight: it
diff --git a/src/Output.zig b/src/Output.zig
index 8cf57591..5bc1f9fc 100644
--- a/src/Output.zig
+++ b/src/Output.zig
@@ -262,9 +262,6 @@ pub fn fromWord(w: []const u8) ?Origin {
     if (std.mem.eql(u8, w, config.errors_buffer)) return .errors;
     if (std.mem.eql(u8, w, config.pdf_links_buffer)) return .pdf_links;
     if (std.mem.eql(u8, w, config.unsaved_buffer)) return .unsaved;
-    // A dump from before the rename names them by their old words.
-    if (std.mem.eql(u8, w, "ThemeSel")) return .{ .cmd = .Themes };
-    if (builtins.capabilities.font_picker) if (std.mem.eql(u8, w, "FontSel")) return .{ .cmd = .Fonts };
     if (std.meta.stringToEnum(Builtin, w)) |b|
         if (builtins.registry.outputTraits(b) != null) return .{ .cmd = b };
     if (std.meta.stringToEnum(lsp.Kind, w)) |k| return .{ .query = k };
diff --git a/src/dump.zig b/src/dump.zig
index 78c2bd7a..2d3c2593 100644
--- a/src/dump.zig
+++ b/src/dump.zig
@@ -905,7 +905,6 @@ fn initDump(gpa: std.mem.Allocator, opts: Options, zon_bytes: []const u8, previo
                     restored.command_done = true;
                     restored.command_status = t.status;
                 }
-                if (std.mem.startsWith(u8, src.tag, "TTY ")) restored.body.mode = .tty;
                 if (revive) p.emitSpawn(i, restored.serial, t.cwd);
                 break :terminal restored;
             },
diff --git a/src/exec.zig b/src/exec.zig
index 221de105..8c062f66 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -870,58 +870,10 @@ pub fn applyStartupConfig(p: *Pardes) void {
     defer p.announce = true;
     var lines = std.mem.splitScalar(u8, p.opts.startup_config orelse return, '\n');
     while (lines.next()) |line| {
-        if (executeBuiltinLine(p, p.active, line)) continue;
-        // A setting pardes no longer has is said, once, and changes nothing.
-        const word = commandText(line);
-        const head = word[0 .. std.mem.indexOfAny(u8, word, " \t") orelse word.len];
-        if (std.mem.eql(u8, head, "ColumnTags"))
-            p.setMessage(p.active, "ColumnTags: column tags are always shown now; the init line is ignored");
-        // A word renamed runs as its new name, and says so, once a line.
-        for ([_][2][]const u8{ .{ "ThemeSel", "Themes" }, .{ "FontSel", "Fonts" } }) |renamed| if (std.mem.eql(u8, head, renamed[0])) {
-            _ = executeBuiltinLine(p, p.active, renamed[1]);
-            var said: [64]u8 = undefined;
-            p.setMessage(p.active, std.fmt.bufPrint(&said, "{s}: renamed to {s}", .{ renamed[0], renamed[1] }) catch "renamed");
-        };
+        _ = executeBuiltinLine(p, p.active, line);
     }
 }
 
-test "an init file's ThemeSel runs as Themes and says it was renamed" {
-    const p = try Pardes.init(std.testing.allocator, .{ .tty_only = true, .cols = 80, .rows = 24, .startup_config = "ThemeSel\n" });
-    defer p.deinit();
-    var listed = false;
-    for (p.panes) |slot| if (slot) |pane| if (pane.file) |f| if (f.output) |o| {
-        listed = listed or std.meta.eql(o.from, panes.Output.Origin{ .cmd = .Themes });
-    };
-    try std.testing.expect(listed);
-    // In the session's directory, not `/`.
-    for (p.panes) |slot| if (slot) |pane| if (pane.file) |f| if (f.output != null)
-        try std.testing.expectEqualStrings(p.sessionDir(), std.fs.path.dirname(f.path).?);
-    var said = false;
-    for (p.panes) |slot| if (slot) |pane| {
-        said = said or std.mem.eql(u8, pane.msg[0..pane.msg_len], "ThemeSel: renamed to Themes");
-    };
-    try std.testing.expect(said);
-    // The panes there at boot are the log's first records, before what the
-    // init file said.
-    const th = @import("ninep/testing.zig");
-    const log = @intFromEnum(pardes.ctlfs.TopFile.log);
-    const h = th.call(p, .{ .tag = 1, .op = .open, .node = log }).reply.handle;
-    defer _ = th.call(p, .{ .tag = 3, .op = .release, .node = log, .handle = h });
-    const text = th.call(p, .{ .tag = 2, .op = .read, .node = log, .handle = h, .size = 1 << 16 }).bytes;
-    try std.testing.expectStringStartsWith(text, "new ");
-}
-
-test "an init file's retired ColumnTags line is said and ignored" {
-    const p = try Pardes.init(std.testing.allocator, .{ .tty_only = true, .cols = 80, .rows = 24 });
-    defer p.deinit();
-    p.opts.startup_config = "ColumnTags\nWrap off\n";
-    applyStartupConfig(p);
-    try std.testing.expect(!p.settings.wrap);
-    try std.testing.expect(p.columnBarHeight() > 0);
-    const pane = p.panes[p.active].?;
-    try std.testing.expectEqualStrings("ColumnTags: column tags are always shown now; the init line is ignored", pane.msg[0..pane.msg_len]);
-}
-
 pub fn runBuiltin(p: *Pardes, b: Builtin, id: usize, txt: []const u8, arg: ?[]const u8) void {
     runBuiltinFrom(p, b, id, txt, arg, false);
 }
diff --git a/src/image.zig b/src/image.zig
index 7b081ec6..936fe19a 100644
--- a/src/image.zig
+++ b/src/image.zig
@@ -916,14 +916,6 @@ pub fn tagPrefix(arena: std.mem.Allocator, state: *const State) ![]u8 {
     );
 }
 
-pub fn legacySavedPrefix(state: *const State, saved_tag: []const u8) ?[]const u8 {
-    const lead = config.tag_image ++ " ";
-    if (!std.mem.startsWith(u8, saved_tag, lead)) return null;
-    const path_at = lead.len;
-    if (!std.mem.startsWith(u8, saved_tag[path_at..], state.path)) return null;
-    return saved_tag[0 .. path_at + state.path.len];
-}
-
 fn ensureDecoded(p: *pardes.Pardes, state: *State) void {
     if (state.tried) return;
     state.tried = true;
diff --git a/src/pardes.zig b/src/pardes.zig
index 3ecc80ae..151fe7b0 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -751,13 +751,6 @@ test "Collapse builtin keeps content and restores the pane from its default tag"
     p.sync();
     try std.testing.expect(!pane.collapsed);
     try std.testing.expectEqual(height, p.rects[0].h);
-
-    // Unedited defaults from the preceding version gain the new command.
-    if (pane.tag.own) |own| p.gpa.free(own);
-    pane.tag.own = null;
-    tagline.restoreTailAt(p, pane, tagline.pre_collapse_file_pane_tail, "", .file);
-    try std.testing.expect(pane.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.file_pane_tail, tagline.curTail(pane));
 }
 
 test "LocationsConfig command reports partial updates and survives restore" {
@@ -985,129 +978,6 @@ test "compact tag commands stay beside their own prefix across layout changes" {
     try std.testing.expectEqualStrings(above_tag, try tagline.tagText(p, p.scratch.allocator(), above));
 }
 
-test "legacy default tag tails upgrade while custom tails remain owned" {
-    const gpa = std.testing.allocator;
-    const p = try Pardes.init(gpa, .{});
-    defer p.deinit();
-
-    const terminal = p.panes[0].?;
-    const terminal_old = try std.fmt.allocPrint(p.scratch.allocator(), "{s}{s}", .{
-        try tagline.tagPrefix(p, terminal),
-        tagline.legacy_pane_tail,
-    });
-    tagline.restoreTail(p, terminal, terminal_old);
-    try std.testing.expect(terminal.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.terminal_pane_tail, tagline.curTail(terminal));
-
-    const terminal_previous = try std.fmt.allocPrint(p.scratch.allocator(), "{s}       New Del", .{
-        try tagline.tagPrefix(p, terminal),
-    });
-    tagline.restoreTail(p, terminal, terminal_previous);
-    try std.testing.expect(terminal.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.terminal_pane_tail, tagline.curTail(terminal));
-
-    const terminal_prefilter = try std.fmt.allocPrint(p.scratch.allocator(), "{s}{s}", .{
-        try tagline.tagPrefix(p, terminal),
-        tagline.prev_terminal_pane_tail,
-    });
-    tagline.restoreTail(p, terminal, terminal_prefilter);
-    try std.testing.expect(terminal.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.terminal_pane_tail, tagline.curTail(terminal));
-
-    for ([_][]const u8{ tagline.pre_mode_terminal_pane_tail, tagline.pre_tty_first_terminal_pane_tail, tagline.pre_collapse_terminal_pane_tail }) |old_tail| {
-        const old = try std.fmt.allocPrint(p.scratch.allocator(), "{s}{s}", .{ try tagline.tagPrefix(p, terminal), old_tail });
-        tagline.restoreTail(p, terminal, old);
-        try std.testing.expect(terminal.tag.own == null);
-        try std.testing.expectEqualStrings(tagline.terminal_pane_tail, tagline.curTail(terminal));
-    }
-    const custom_mode = try std.fmt.allocPrint(p.scratch.allocator(), "{s}{s} Keep", .{ try tagline.tagPrefix(p, terminal), tagline.pre_mode_terminal_pane_tail });
-    tagline.restoreTail(p, terminal, custom_mode);
-    try std.testing.expect(terminal.tag.own != null);
-    try std.testing.expectEqualStrings(tagline.pre_mode_terminal_pane_tail ++ " Keep", tagline.curTail(terminal));
-
-    if (terminal.tag.own) |own| p.gpa.free(own);
-    terminal.tag.own = null;
-    const terminal_custom = try std.fmt.allocPrint(p.scratch.allocator(), "{s} Keep Del", .{
-        try tagline.tagPrefix(p, terminal),
-    });
-    tagline.restoreTail(p, terminal, terminal_custom);
-    try std.testing.expect(terminal.tag.own != null);
-    try std.testing.expectEqualStrings(" Keep Del", tagline.curTail(terminal));
-
-    if (terminal.tag.own) |own| p.gpa.free(own);
-    terminal.tag.own = null;
-    tagline.restoreDumpTail(p, terminal, .{
-        .kind = .terminal,
-        .tag = "TTY /historical/cwd Keep Del",
-        .body = "",
-        .terminal = .{ .cwd = "/historical/cwd" },
-    });
-    try std.testing.expect(terminal.tag.own != null);
-    try std.testing.expectEqualStrings(" Keep Del", tagline.curTail(terminal));
-
-    if (terminal.tag.own) |own| p.gpa.free(own);
-    terminal.tag.own = null;
-    tagline.restoreDumpTail(p, terminal, .{
-        .kind = .terminal,
-        .tag = "TTY /historical/cwd       New Del",
-        .body = "",
-        .terminal = .{ .cwd = "/historical/cwd" },
-    });
-    try std.testing.expect(terminal.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.terminal_pane_tail, tagline.curTail(terminal));
-
-    // This happens to be the historical FILE default, but on a terminal it is
-    // user-owned text and must not be swallowed by migration.
-    if (terminal.tag.own) |own| p.gpa.free(own);
-    terminal.tag.own = null;
-    const terminal_fileish = try std.fmt.allocPrint(p.scratch.allocator(), "{s} Save Del", .{
-        try tagline.tagPrefix(p, terminal),
-    });
-    tagline.restoreTail(p, terminal, terminal_fileish);
-    try std.testing.expect(terminal.tag.own != null);
-    try std.testing.expectEqualStrings(" Save Del", tagline.curTail(terminal));
-
-    // A savable file has a distinct old default. Save remains first after the
-    // migration so the tag's established `:w<Tab>` route is unchanged.
-    const file = try p.setTestFile("");
-    const file_old = try std.fmt.allocPrint(p.scratch.allocator(), "{s}{s}", .{
-        try tagline.tagPrefix(p, file),
-        tagline.legacy_file_pane_tail,
-    });
-    tagline.restoreTail(p, file, file_old);
-    try std.testing.expect(file.tag.own == null);
-    try std.testing.expectEqualStrings(" Save Tty Collapse Del", tagline.curTail(file));
-
-    const file_custom = try std.fmt.allocPrint(p.scratch.allocator(), "{s} Save Mine Del", .{
-        try tagline.tagPrefix(p, file),
-    });
-    tagline.restoreTail(p, file, file_custom);
-    try std.testing.expect(file.tag.own != null);
-    try std.testing.expectEqualStrings(" Save Mine Del", tagline.curTail(file));
-
-    // Conversely the generic pane's current default is a custom edit on a
-    // savable file. Legacy recognition is scoped to the source pane class.
-    if (file.tag.own) |own| p.gpa.free(own);
-    file.tag.own = null;
-    const file_generic = try std.fmt.allocPrint(p.scratch.allocator(), "{s} New Del", .{
-        try tagline.tagPrefix(p, file),
-    });
-    tagline.restoreTail(p, file, file_generic);
-    try std.testing.expect(file.tag.own != null);
-    try std.testing.expectEqualStrings(" New Del", tagline.curTail(file));
-
-    const image_doc = try panes.Image.create(p, 1, "/tmp/legacy image.ppm", &.{});
-    try std.testing.expectEqualStrings(" Tty Collapse Del", tagline.curTail(image_doc));
-    tagline.restoreDumpTail(p, image_doc, .{
-        .kind = .image,
-        .tag = "img /tmp/legacy image.ppm Keep Del",
-        .body = "",
-        .image = .{ .path = "/tmp/legacy image.ppm" },
-    });
-    try std.testing.expect(image_doc.tag.own != null);
-    try std.testing.expectEqualStrings(" Keep Del", tagline.curTail(image_doc));
-}
-
 test "Joincol folds the active column into its right neighbor, keeping its panes" {
     const gpa = std.testing.allocator;
     const p = try Pardes.init(gpa, .{ .tty_only = true, .cols = 100, .rows = 30 });
@@ -1434,14 +1304,6 @@ test "pane defaults keep creation of scratch panes in column tags" {
         while (words.next()) |word| try std.testing.expect(!std.mem.eql(u8, word, "New"));
     }
     try std.testing.expectEqualStrings("New Tty Find Grep Joincol Delcol", tagline.columnTag(p, 0));
-    const terminal = p.panes[0].?;
-    tagline.restoreTailAt(p, terminal, tagline.pre_column_terminal_pane_tail, "", .terminal);
-    try std.testing.expect(terminal.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.terminal_pane_tail, tagline.curTail(terminal));
-    const file = try p.setTestFile("unchanged\n");
-    tagline.restoreTailAt(p, file, tagline.pre_column_file_pane_tail, "", .file);
-    try std.testing.expect(file.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.file_pane_tail, tagline.curTail(file));
 }
 
 test "an unsaved file's tag is its name alone: the grip, not a mark, says it is unsaved" {
@@ -2640,27 +2502,8 @@ test "Save reaches every tagline with text behind it and no other" {
     out.file.?.output = .{ .from = .search };
     try std.testing.expectEqualStrings(tagline.locations_pane_tail, tagline.curTail(out));
 
-    // A dump written before Save reached output buffers carries the generic
-    // tail. That is a DEFAULT and not something typed, so it upgrades.
-    const dumped = try std.fmt.allocPrint(p.scratch.allocator(), "{s}{s}", .{
-        try tagline.tagPrefix(p, out),
-        tagline.pane_tail,
-    });
-    tagline.restoreTail(p, out, dumped);
-    try std.testing.expect(out.tag.own == null);
-    try std.testing.expectEqualStrings(tagline.locations_pane_tail, tagline.curTail(out));
-
-    // A scratch is an output buffer that has worn the FILE tails all along,
-    // so its own older default upgrades from that family too.
+    // A scratch is an output buffer that wears the FILE tails.
     out.file.?.output = .{ .from = .{ .cmd = std.meta.stringToEnum(Builtin, "New").? } };
-    if (out.tag.own) |own| p.gpa.free(own);
-    out.tag.own = null;
-    const scratch_dumped = try std.fmt.allocPrint(p.scratch.allocator(), "{s}{s}", .{
-        try tagline.tagPrefix(p, out),
-        tagline.prev_file_pane_tail,
-    });
-    tagline.restoreTail(p, out, scratch_dumped);
-    try std.testing.expect(out.tag.own == null);
     try std.testing.expectEqualStrings(" Save Tty Collapse Del", tagline.curTail(out));
 
     // An image's bytes on disk already are what they are: nothing of the
diff --git a/src/pdf_view.zig b/src/pdf_view.zig
index 8f842cde..5646a92f 100644
--- a/src/pdf_view.zig
+++ b/src/pdf_view.zig
@@ -57,24 +57,6 @@ pub const RasterPolicy = struct {
     match_viewport: bool,
 };
 
-pub fn legacySavedPrefix(path: []const u8, saved_tag: []const u8) ?[]const u8 {
-    if (std.mem.startsWith(u8, saved_tag, path) and std.mem.startsWith(u8, saved_tag[path.len..], " [")) {
-        const start = path.len + 2;
-        const end = std.mem.indexOfScalarPos(u8, saved_tag, start, ']') orelse return null;
-        var parts = std.mem.splitScalar(u8, saved_tag[start..end], '/');
-        _ = std.fmt.parseInt(usize, parts.next() orelse return null, 10) catch return null;
-        _ = std.fmt.parseInt(usize, parts.next() orelse return null, 10) catch return null;
-        if (parts.next() != null) return null;
-        return saved_tag[0 .. end + 1];
-    }
-    if (!std.mem.startsWith(u8, saved_tag, "pdf ")) return null;
-    const marker = " PdfSections ";
-    const marker_at = std.mem.indexOf(u8, saved_tag, marker) orelse return null;
-    const path_at = marker_at + marker.len;
-    if (!std.mem.startsWith(u8, saved_tag[path_at..], path)) return null;
-    return saved_tag[0 .. path_at + path.len];
-}
-
 pub const TintKey = if (enabled) struct {
     mode: TintMode,
     colors: pdf.TintColors,
diff --git a/src/tagline.zig b/src/tagline.zig
index df093925..1923871a 100644
--- a/src/tagline.zig
+++ b/src/tagline.zig
@@ -23,43 +23,11 @@ pub const context_pane_tail = file_pane_tail ++ " TreeContext";
 pub const locations_pane_tail = file_pane_tail ++ " LocationsConfig";
 pub const terminal_pane_tail = " " ++ config.terminal_pane_builtins_str;
 pub const command_pane_tail = " " ++ config.command_pane_builtins_str;
-/// The mark a tag carried after an unsaved file's name before the grip
-/// showed it; a dump from then still has it in its saved tags.
-const dirty_marker = " *";
-
 /// A file with changes it has not saved.
 pub fn dirty(pane: *const panes.Pane) bool {
     const f = pane.file orelse return false;
     return panes.Output.fileTraits(f.output).saves and (f.revision != f.saved_revision or f.disk_gone);
 }
-pub const legacy_pane_tail = " Del";
-pub const legacy_file_pane_tail = " Save Del";
-// The defaults from the release before Newtty joined every tagline. Recognized
-// so a dump written then upgrades instead of keeping the old word as a tail.
-const prev_pane_tail = " New Del";
-pub const prev_file_pane_tail = " Save New Del";
-const legacy_terminal_pane_tail = " New Del Filter";
-// ...and the terminal default from the release before Save reached it, when a
-// scrollback was not yet something you could write to a path.
-pub const prev_terminal_pane_tail = " New Newtty Del Filter";
-const pre_tty_terminal_pane_tail = " Save New Newtty Del Filter";
-const pre_column_pane_tail = " New Newtty Del";
-pub const pre_column_file_pane_tail = " Save New Newtty Del";
-const pre_column_pdf_pane_tail = " New Newtty Del PdfSections PdfTint";
-pub const pre_column_terminal_pane_tail = " Save New Newtty Del Tty Filter";
-const pre_collapse_pane_tail = " Tty Del";
-pub const pre_collapse_file_pane_tail = " Save Tty Del";
-const pre_collapse_pdf_pane_tail = " Tty Del PdfSections PdfTint";
-pub const pre_collapse_terminal_pane_tail = " Save Tty Del Togglettymode Filter";
-pub const pre_tty_first_terminal_pane_tail = " Save Tty Del Togglettymode Filter Collapse";
-pub const pre_mode_terminal_pane_tail = " Tty Save Del Togglettymode Filter Collapse";
-// ...and the defaults from before the closing word moved to the end of every
-// tagline, where a click cannot land on it by overshooting the one before.
-const pre_close_last_pane_tail = " Tty Del Collapse";
-const pre_close_last_file_pane_tail = " Save Tty Del Collapse";
-const pre_close_last_pdf_pane_tail = " Tty Del PdfSections PdfTint Collapse";
-const pre_close_last_terminal_pane_tail = " Tty Save Del Mode Filter Collapse";
-
 /// What a column's tag says until someone edits it.
 pub const column_tag_default = "New Tty Find Grep Joincol Delcol";
 
@@ -420,106 +388,11 @@ pub fn enterHeader(p: *Pardes, column: ?usize) void {
     t.normal.clear();
 }
 
+/// A dump's tag tail, what was typed after the name: a dump from 0.0.4 on
+/// writes it, and an older one's saved tag is not read.
 pub fn restoreDumpTail(p: *Pardes, pane: *Pane, src: dump.Pane) void {
-    if (src.tag_tail) |tail| {
-        pane.tag.own = p.gpa.dupe(u8, tail) catch return;
-        return;
-    }
-    const tail_class = tailClass(pane);
-    if (src.kind == .image and panes.Pdf.isPath(src.image.?.path)) {
-        if (panes.Pdf.legacySavedPrefix(src.image.?.path, src.tag)) |prefix|
-            return restoreTailAt(p, pane, src.tag, prefix, .generic);
-    }
-    if (src.kind == .terminal and std.mem.startsWith(u8, src.tag, "TTY ")) {
-        const legacy = std.fmt.allocPrint(p.scratch.allocator(), "TTY {s}", .{src.terminal.?.cwd}) catch return;
-        if (std.mem.startsWith(u8, src.tag, legacy))
-            return restoreTailAt(p, pane, src.tag, legacy, .terminal);
-    }
-    const current = tagPrefix(p, pane) catch return;
-    if (std.mem.startsWith(u8, src.tag, current))
-        return restoreTailAt(p, pane, src.tag, savedPrefix(src.tag, current, tail_class), tail_class);
-    if (src.kind != .image) return;
-    const saved = src.image.?;
-    if (pane.image) |*state| if (panes.Image.legacySavedPrefix(state, src.tag)) |legacy|
-        return restoreTailAt(p, pane, src.tag, legacy, .generic);
-    if (panes.Pdf.isPath(saved.path)) if (panes.Pdf.legacySavedPrefix(saved.path, src.tag)) |legacy|
-        restoreTailAt(p, pane, src.tag, legacy, .generic);
-}
-
-pub fn restoreTail(p: *Pardes, pane: *Pane, saved_tag: []const u8) void {
-    const pfx = tagPrefix(p, pane) catch return;
-    const class = tailClass(pane);
-    restoreTailAt(p, pane, saved_tag, savedPrefix(saved_tag, pfx, class), class);
-}
-
-const TailClass = enum { generic, file, output, terminal };
-
-fn tailClass(pane: *const Pane) TailClass {
-    if (pane.file) |f| return if (f.output == null) .file else .output;
-    if (pane.isTerminal()) return .terminal;
-    return .generic;
-}
-
-fn savedPrefix(saved_tag: []const u8, live: []const u8, class: TailClass) []const u8 {
-    if (class == .generic or class == .terminal) return live;
-    if (!std.mem.startsWith(u8, saved_tag, live)) return live;
-    const marked_len = live.len + dirty_marker.len;
-    if (saved_tag.len >= marked_len and std.mem.eql(u8, saved_tag[live.len..marked_len], dirty_marker))
-        return saved_tag[0..marked_len];
-    return live;
-}
-
-pub fn restoreTailAt(
-    p: *Pardes,
-    pane: *Pane,
-    saved_tag: []const u8,
-    pfx: []const u8,
-    class: TailClass,
-) void {
-    if (!std.mem.startsWith(u8, saved_tag, pfx)) return;
-    const rest = saved_tag[pfx.len..];
-    const said = std.mem.trimStart(u8, rest, " ");
-    const defaults: []const []const u8 = switch (class) {
-        .generic => &.{ pdf_pane_tail, pane_tail, pre_close_last_pdf_pane_tail, pre_close_last_pane_tail, pre_collapse_pdf_pane_tail, pre_collapse_pane_tail, pre_column_pdf_pane_tail, pre_column_pane_tail, prev_pane_tail, legacy_pane_tail },
-        .file => &.{ context_pane_tail, file_pane_tail, pre_close_last_file_pane_tail, pre_collapse_file_pane_tail, pre_column_file_pane_tail, prev_file_pane_tail, legacy_file_pane_tail },
-        .output => &.{
-            locations_pane_tail,
-            file_pane_tail,
-            pre_close_last_file_pane_tail,
-            pre_close_last_pane_tail,
-            prev_file_pane_tail,
-            legacy_file_pane_tail,
-            pane_tail,
-            prev_pane_tail,
-            legacy_pane_tail,
-            pre_column_file_pane_tail,
-            pre_column_pane_tail,
-            pre_collapse_file_pane_tail,
-            pre_collapse_pane_tail,
-        },
-        .terminal => &.{ terminal_pane_tail, pre_close_last_terminal_pane_tail, pre_close_last_pane_tail, pre_mode_terminal_pane_tail, pre_tty_first_terminal_pane_tail, pre_collapse_terminal_pane_tail, pre_column_terminal_pane_tail, pre_tty_terminal_pane_tail, prev_terminal_pane_tail, legacy_terminal_pane_tail, pane_tail, pre_collapse_pane_tail, pre_column_pane_tail, prev_pane_tail, legacy_pane_tail },
-    };
-    // A terminal's saved tag carries what was live about it -- the REPL id
-    // after its directory, the shell in its Tty word -- which is neither
-    // dumped nor true of the new shell: its tail is still the default.
-    var plain = said;
-    var plain_buf: [256]u8 = undefined;
-    if (class == .terminal) {
-        const first = plain[0 .. std.mem.indexOfScalar(u8, plain, ' ') orelse plain.len];
-        if (std.mem.lastIndexOfScalar(u8, first, '-')) |dash| if (dash + 2 == first.len and first[dash + 1] >= 'a' and first[dash + 1] <= 'z') {
-            for (@import("grammar_manifest.zig").all) |g| if (std.mem.eql(u8, g.name, first[0..dash])) {
-                plain = std.mem.trimStart(u8, plain[first.len..], " ");
-                break;
-            };
-        };
-        if (std.mem.startsWith(u8, plain, "Tty+")) {
-            const word_end = std.mem.indexOfScalar(u8, plain, ' ') orelse plain.len;
-            plain = std.fmt.bufPrint(&plain_buf, "Tty{s}", .{plain[word_end..]}) catch plain;
-        }
-    }
-    for (defaults) |default|
-        if (std.mem.eql(u8, plain, std.mem.trimStart(u8, default, " "))) return;
-    pane.tag.own = p.gpa.dupe(u8, rest) catch return;
+    const tail = src.tag_tail orelse return;
+    pane.tag.own = p.gpa.dupe(u8, tail) catch return;
 }
 
 /// The span a header's selection covers on line `row` of its text, in
diff --git a/src/terminal.zig b/src/terminal.zig
index c99a92a6..6bf46bef 100644
--- a/src/terminal.zig
+++ b/src/terminal.zig
@@ -509,13 +509,7 @@ pub fn restore(p: *Pardes, src: dump.Pane, live: bool) !*Pane {
             pane.ovl = .{ .row = 0, .rows = 1, .text = try p.gpa.dupe(u8, terminal.stream) };
         return pane;
     }
-    // An older dump's raw output tail cannot come back live: cut off mid
-    // redraw, or written at sizes the pane no longer has, it replays as
-    // garbage. Its rendered text can.
-    const legacy_text = live and !terminal.stream_is_screen and terminal.stream.len > 0;
-    const bytes = if (legacy_text)
-        try std.mem.replaceOwned(u8, p.scratch.allocator(), terminal.stream, "\n", "\r\n")
-    else if (terminal.stream_b64.len > 0)
+    const bytes = if (terminal.stream_b64.len > 0)
         try dump.decodeBytes(p.scratch.allocator(), terminal.stream_b64)
     else
         &.{};
@@ -759,31 +753,6 @@ test "a restored terminal keeps its history above a marker and gets a shell wher
     try std.testing.expect(old_at < mark_at);
 }
 
-test "an older dump comes back live from its rendered text, not its raw output tail" {
-    if (comptime !enabled) return error.SkipZigTest;
-    const gpa = std.testing.allocator;
-    const p = try Pardes.init(gpa, .{ .tty_only = true, .cols = 40, .rows = 12 });
-    defer p.deinit();
-    // A tail cut mid-redraw: relative moves from a cursor it never set.
-    const tail = try dump.encodeBytes(gpa, "\x1b[7A\x1b[2Kgarbage\x1b[3B\x1b[9Gmore");
-    defer gpa.free(tail);
-    const restored = try restore(p, .{
-        .kind = .terminal,
-        .tag = "",
-        .body = "",
-        .cols = 40,
-        .rows = 12,
-        .terminal = .{ .stream = "$ ls\na.txt  b.txt\n$ ", .stream_b64 = tail },
-    }, true);
-    defer gpa.destroy(restored);
-    defer deinitEmulator(restored, gpa);
-    defer deinitPendingCommand(restored);
-    const text = try screenTextAlloc(restored, gpa);
-    defer gpa.free(text);
-    try std.testing.expect(std.mem.indexOf(u8, text, "$ ls\na.txt  b.txt") != null);
-    try std.testing.expect(std.mem.indexOf(u8, text, "garbage") == null);
-}
-
 /// Record and parse one live pty read, invalidate its motion surface, and
 /// follow it only when the body (possibly parked under a tag edit) is raw.
 pub fn feedOutput(p: *Pardes, pane: *Pane, bytes: []const u8) void {
diff --git a/test/column_grip.py b/test/column_grip.py
deleted file mode 100644
index ac0341c3..00000000
--- a/test/column_grip.py
+++ /dev/null
@@ -1,132 +0,0 @@
-#!/usr/bin/env python3
-"""Drag a column grip in the real SDL window with pixel mouse events.
-
-WAYLAND_DISPLAY=/run/user/1000/wayland-1 \\
-    python3 -B test/column_grip.py zig-out/bin/pardes-gui /tmp/pardes-column-grip [--pad 7]
-
-The window is hidden (PARDES_TEST). Mouse events enter as ESC]777;mouse
-sequences on stdin, which the GUI builds into SDL events and dispatches like
-its own, so pixel-to-cell and tag hit testing run as they do under a hand.
-9P observes the grid; each step leaves a PNG of the GPU frame in the output
-directory: grip-rest, grip-resize-drag, grip-reorder-drag, grip-done.
-"""
-import argparse
-import os
-from pathlib import Path
-import shutil
-import subprocess
-import time
-
-from fs import session
-from ui_review import require, wait_for
-
-
-def rows(client):
-    frame = client.screen()
-    cols = frame['cols']
-    return [''.join(cell[0] for cell in frame['cells'][at:at + cols]) for at in range(0, len(frame['cells']), cols)]
-
-
-def rail(client):
-    """The one column the drag preview's rail runs down, if any."""
-    bottom = rows(client)[-1]
-    found = [x for x, ch in enumerate(bottom) if ch == '╎']
-    require(len(found) <= 1, f'more than one rail: {found}')
-    return found[0] if found else None
-
-
-def grab(root, label):
-    time.sleep(.5)
-    def convert():
-        shutil.copyfile(root / 'latest.ppm', root / (label + '.ppm'))
-        return subprocess.run(['magick', str(root / (label + '.ppm')), str(root / (label + '.png'))],
-                              stderr=subprocess.DEVNULL).returncode == 0
-    require(wait_for(convert, 8), 'GPU capture did not contain a complete image')
-    return root / (label + '.png')
-
-
-def pixel(path, x, y):
-    out = subprocess.run(['magick', str(path), '-format', f'%[pixel:p{{{x},{y}}}]', 'info:'],
-                         capture_output=True, text=True, check=True)
-    return out.stdout.strip()
-
-
-def run(args):
-    root = args.output.resolve()
-    shutil.rmtree(root, ignore_errors=True)
-    root.mkdir(parents=True, mode=0o700)
-    (root / 'config/pardes').mkdir(parents=True)
-    (root / 'config/pardes/init').write_text('Shell /bin/sh\n')
-    (root / 'w.txt').write_text('alpha\nbeta\n')
-    name = 'column-grip-' + str(os.getpid())
-    launch = ['-c', 'stty cols 100 rows 30; exec "$@"', 'column-grip',
-              str(args.binary.resolve()), '--9p=' + name, str(root / 'w.txt')]
-    env = {'PARDES_TEST': '1', 'PARDES_TEST_CAPTURE_DIR': str(root), 'PARDES_TEST_COLS': '100',
-           'PARDES_TEST_ROWS': '30', 'PARDES_TEST_PAD': str(args.pad)}
-    handles = {}
-    with session('/bin/sh', root, name, socket_name=name, tty=True, launch=launch,
-                 inherited=env, terminal=handles) as (client, _):
-        def send(data):
-            os.write(handles['input_fd'], data.encode())
-
-        def mouse(kind, button, col, row):
-            # the middle of a grid cell, in window pixels
-            send(f'\x1b]777;mouse;{kind};{button};{(col + .5) * cw};{(row + .5) * ch}\x07')
-            time.sleep(.15)
-
-        require(wait_for(lambda: 'Newcol' in rows(client)[0]), 'workspace tag never drew')
-        send('\x1bn')
-        time.sleep(.3)
-        send('\x1bc')
-        require(wait_for(lambda: rows(client)[1].count('New Tty') == 2), 'no second column')
-        require(wait_for(lambda: (root / 'latest.ppm').exists(), 8), 'GPU capture missing')
-        time.sleep(.5)
-        with open(root / 'latest.ppm', 'rb') as ppm:
-            ppm.readline()
-            width, height = map(int, ppm.readline().split())
-        frame = client.screen()
-        cw = (width - args.pad) // frame['cols']
-        ch = (height - args.pad) // frame['rows']
-        edge = rows(client)[1].index('New Tty', 10) - 3
-
-        rest = grab(root, 'grip-rest')
-        mouse('down', 1, edge, 1)
-        held = grab(root, 'grip-held')
-        require(pixel(held, int((edge + 1) * cw), int(1.5 * ch)) != pixel(rest, int((edge + 1) * cw), int(1.5 * ch)),
-                'a grabbed grip looks the same as a resting one')
-        require(rail(client) is None, 'a grip held in place previews a move')
-
-        # Short of the left column's middle: the left edge follows, and the
-        # rail is the seam cell left of where the rule will be.
-        for col in range(edge, edge - 11, -1):
-            mouse('motion', 1, col, 1)
-        require(rail(client) == edge - 11, f'resize rail at {rail(client)}, wanted {edge - 11}')
-        grab(root, 'grip-resize-drag')
-        mouse('up', 1, edge - 10, 1)
-        require(wait_for(lambda: rows(client)[1].index('New Tty', 10) - 3 == edge - 10), 'left edge did not follow the grip')
-        edge -= 10
-
-        # Over the left column's left half: it goes first, and the rail runs
-        # just past the left window edge's scroll rail.
-        mouse('down', 1, edge, 1)
-        for col in range(edge, 4, -5):
-            mouse('motion', 1, col, 10)
-        require(rail(client) == 1, f'reorder rail at {rail(client)}, wanted 1')
-        grab(root, 'grip-reorder-drag')
-        mouse('up', 1, 5, 10)
-        require(wait_for(lambda: 'alpha' in rows(client)[3][50:]), 'the column did not move first')
-        require(rail(client) is None, 'the rail outlived the drag')
-        grab(root, 'grip-done')
-    print('ok', root)
-
-
-def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument('binary', type=Path)
-    parser.add_argument('output', type=Path)
-    parser.add_argument('--pad', type=int, default=0, help='leftover pixels past the grid (PARDES_TEST_PAD)')
-    run(parser.parse_args())
-
-
-if __name__ == '__main__':
-    main()
diff --git a/test/fs_soak.py b/test/fs_soak.py
deleted file mode 100644
index a62f03e6..00000000
--- a/test/fs_soak.py
+++ /dev/null
@@ -1,284 +0,0 @@
-#!/usr/bin/env python3
-import argparse
-import json
-import os
-from pathlib import Path
-import random
-import socket
-import struct
-import tempfile
-import time
-
-from fs import new_pane, session
-from ninep import Client
-
-
-BODY_LIMIT = 4096
-SCREEN_LIMIT = 4 * 1024 * 1024
-FRAGMENTS = [
-    b'const value = 42;\n', b'fn check() void { if (true) return; }\n',
-    b'\tspaces and tabs\n', 'λ 界 e\u0301 👩\u200d🚀\n'.encode(), b'x',
-]
-OPERATIONS = ['append', 'range', 'replace', 'read', 'save', 'reload',
-              'cycle', 'reconnect', 'screen']
-
-
-def emit(**record):
-    print(json.dumps(record, separators=(',', ':')), flush=True)
-
-
-def payload(rng, limit=256):
-    result = bytearray()
-    for _ in range(rng.randint(1, 12)):
-        fragment = rng.choice(FRAGMENTS)
-        if len(result) + len(fragment) <= limit:
-            result.extend(fragment)
-    return bytes(result) or b'x'[:limit]
-
-
-def check_bytes(actual, expected, label):
-    if actual == expected:
-        return
-    at = next((i for i, pair in enumerate(zip(actual, expected))
-               if pair[0] != pair[1]), min(len(actual), len(expected)))
-    raise AssertionError(f'{label}: mismatch at byte {at}; '
-                         f'length {len(actual)} != {len(expected)}; '
-                         f'{actual[at:at + 32]!r} != {expected[at:at + 32]!r}')
-
-
-def read_fid(client, fid, limit, count):
-    result = bytearray()
-    while chunk := client.read_fid(fid, len(result), count):
-        result.extend(chunk)
-        if len(result) > limit:
-            raise AssertionError(f'read exceeded fixture limit {limit}')
-    return bytes(result)
-
-
-def check_body(client, pane, count=4096):
-    fid = client.open(f'/pane/{pane["serial"]}/body')
-    try:
-        actual = read_fid(client, fid, BODY_LIMIT, count)
-    finally:
-        client.close(fid)
-    check_bytes(actual, pane['body'], f'pane {pane["serial"]}')
-
-
-def check_screen(data):
-    screen = json.loads(data)
-    cols, rows = screen['cols'], screen['rows']
-    assert cols > 0 and rows > 0 and cols * rows <= 65536, (cols, rows)
-    assert len(screen['cells']) == cols * rows
-    styles = screen['styles']
-    assert styles
-    for cell in screen['cells']:
-        assert len(cell) == 2 and isinstance(cell[0], str), cell
-        assert isinstance(cell[1], int) and 0 <= cell[1] < len(styles), cell
-
-
-def session_pid(client):
-    if not hasattr(socket, 'SO_PEERCRED'):
-        return None
-    pid, uid, _ = struct.unpack('3i', client.socket.getsockopt(
-        socket.SOL_SOCKET, socket.SO_PEERCRED, struct.calcsize('3i')))
-    assert pid > 0 and uid == os.getuid(), (pid, uid)
-    return pid
-
-
-def check_session(client, control, pid):
-    assert session_pid(control) == pid
-    if pid is not None:
-        actual = (session_pid(client) if client.socket.family == socket.AF_UNIX
-                  else int(client.read('/os/proc/self/stat').split()[0]))
-        assert actual == pid, (actual, pid)
-
-
-def memory(pid):
-    result = {'rss_bytes': None, 'cumulative_peak_rss_bytes': None}
-    if pid is None:
-        return result
-    try:
-        for line in Path(f'/proc/{pid}/status').read_text().splitlines():
-            fields = line.split()
-            if fields[0] == 'VmRSS:':
-                result['rss_bytes'] = int(fields[1]) * 1024
-            elif fields[0] == 'VmHWM:':
-                result['cumulative_peak_rss_bytes'] = int(fields[1]) * 1024
-    except OSError:
-        pass
-    return result
-
-
-def run(args):
-    rng = random.Random(args.seed)
-    started = time.monotonic()
-    deadline = None
-    batch = 0
-    operation = 'start'
-    operation_count = 0
-    pid = None
-    try:
-        with tempfile.TemporaryDirectory(prefix='pardes-soak-') as directory:
-            root = Path(directory)
-            options = ['--9p-tcp=tcp!127.0.0.1!0'] if args.transport == 'tcp' else []
-            with session(str(args.binary.resolve()), root, 'soak', *options,
-                         tty=args.tty) as (control, unix_address):
-                pid = session_pid(control)
-                address = unix_address
-                if args.transport == 'tcp':
-                    listeners = [line.split('!') for line in
-                                 control.read('/listeners').decode().splitlines()
-                                 if line.startswith('tcp!')]
-                    assert len(listeners) == 1, listeners
-                    transport, host, port = listeners[0]
-                    assert transport == 'tcp' and host == '127.0.0.1' and 0 < int(port) < 65536, listeners
-                    address = (host, int(port))
-                client = Client(address)
-                panes = []
-                try:
-                    check_session(client, control, pid)
-                    for slot in range(4):
-                        body = payload(rng)
-                        serial = 1 if slot == 0 else new_pane(client, body)
-                        base = f'/pane/{serial}'
-                        if slot == 0:
-                            client.write(base + '/body', body, truncate=True)
-                        path = root / f'pane-{slot}-0.zig'
-                        client.write(base + '/name', f'{path}\n'.encode())
-                        client.write(base + '/exec', b'Save\n')
-                        panes.append({'serial': serial, 'body': body, 'path': path, 'variant': 0})
-                    emit(kind='start', seed=args.seed, session_pid=pid,
-                         transport=args.transport, host='tty' if args.tty else 'detached',
-                         batches=args.batches, duration_seconds=args.duration,
-                         interval_seconds=args.interval, body_limit_bytes=BODY_LIMIT,
-                         live_panes=len(panes), **memory(pid))
-                    if args.duration is not None:
-                        deadline = time.monotonic() + args.duration
-                    while (args.batches is None or batch < args.batches) and (
-                            deadline is None or time.monotonic() < deadline):
-                        batch_started = time.monotonic()
-                        operations = OPERATIONS * 2
-                        rng.shuffle(operations)
-                        for operation in operations:
-                            slot = rng.randrange(len(panes))
-                            pane = panes[slot]
-                            base = f'/pane/{pane["serial"]}'
-                            if operation == 'append':
-                                addition = payload(rng, min(256, BODY_LIMIT - len(pane['body'])))
-                                client.write(base + '/body', addition)
-                                pane['body'] += addition
-                            elif operation == 'range':
-                                body = pane['body']
-                                # Keep range endpoints outside combining and ZWJ clusters.
-                                boundaries = [0] + [i for i in range(1, len(body))
-                                                    if body[i - 1] < 128 and body[i] < 128] + [len(body)]
-                                lo, hi = sorted((rng.choice(boundaries), rng.choice(boundaries)))
-                                replacement = payload(rng, min(256, BODY_LIMIT - len(body) + hi - lo))
-                                if replacement:
-                                    client.write(base + '/addr', f'#{lo},#{hi}'.encode())
-                                    client.write(base + '/data', replacement)
-                                    pane['body'] = body[:lo] + replacement + body[hi:]
-                            elif operation == 'replace':
-                                pane['body'] = payload(rng, BODY_LIMIT)
-                                client.write(base + '/body', pane['body'], truncate=True)
-                            elif operation == 'read':
-                                check_body(client, pane, rng.choice([97, 251, 1024, 4096]))
-                            elif operation == 'save':
-                                pane['variant'] ^= 1
-                                pane['path'] = root / f'pane-{slot}-{pane["variant"]}.zig'
-                                client.write(base + '/name', f'{pane["path"]}\n'.encode())
-                                client.write(base + '/exec', b'Save\n')
-                                check_bytes(pane['path'].read_bytes(), pane['body'], 'saved file')
-                                check_bytes(client.read('/os' + str(pane['path'])), pane['body'], 'OS mount')
-                            elif operation == 'reload':
-                                pane['body'] = payload(rng)
-                                pane['path'].write_bytes(pane['body'])
-                                client.write(base + '/ctl', b'get\n')
-                            elif operation == 'cycle':
-                                old_serial = pane['serial']
-                                client.remove(base)
-                                pane['body'] = payload(rng)
-                                pane['serial'] = new_pane(client, pane['body'])
-                                assert pane['serial'] != old_serial
-                                base = f'/pane/{pane["serial"]}'
-                                client.write(base + '/name', f'{pane["path"]}\n'.encode())
-                                client.write(base + '/exec', b'Save\n')
-                            elif operation == 'reconnect':
-                                client.socket.close()
-                                client = Client(address)
-                                check_session(client, control, pid)
-                                check_body(control, pane)
-                            elif operation == 'screen':
-                                frozen = client.open('/screen')
-                                try:
-                                    before = read_fid(client, frozen, SCREEN_LIMIT, 4096)
-                                    check_screen(before)
-                                    addition = payload(rng, min(64, BODY_LIMIT - len(pane['body'])))
-                                    client.write(base + '/body', addition)
-                                    pane['body'] += addition
-                                    after = read_fid(client, frozen, SCREEN_LIMIT, rng.choice([251, 1024]))
-                                    check_bytes(after, before, 'frozen screen')
-                                finally:
-                                    client.close(frozen)
-                                fresh = client.open('/screen')
-                                try:
-                                    check_screen(read_fid(client, fresh, SCREEN_LIMIT, 4096))
-                                finally:
-                                    client.close(fresh)
-                            operation_count += 1
-                            check_body(client, pane)
-                        expected = {str(pane['serial']) for pane in panes}
-                        assert set(client.list('/pane')) == expected
-                        assert set(control.list('/pane')) == expected
-                        for pane in panes:
-                            check_body(client, pane)
-                            check_body(control, pane)
-                        batch += 1
-                        emit(kind='batch', seed=args.seed, batch=batch,
-                             duration_seconds=time.monotonic() - batch_started,
-                             elapsed_seconds=time.monotonic() - started,
-                             operations=len(operations), total_operations=operation_count,
-                             model_bytes=sum(len(pane['body']) for pane in panes), **memory(pid))
-                        delay = args.interval - (time.monotonic() - batch_started)
-                        if deadline is not None:
-                            delay = min(delay, deadline - time.monotonic())
-                        if delay > 0:
-                            time.sleep(delay)
-                finally:
-                    client.socket.close()
-        emit(kind='summary', seed=args.seed, batches=batch,
-             transport=args.transport, host='tty' if args.tty else 'detached',
-             operations=operation_count, duration_seconds=time.monotonic() - started,
-             status='passed')
-    except BaseException as error:
-        emit(kind='failure', seed=args.seed, batch=batch + 1, operation=operation,
-             transport=args.transport, host='tty' if args.tty else 'detached',
-             operations=operation_count, session_pid=pid,
-             elapsed_seconds=time.monotonic() - started, error=str(error))
-        raise
-
-
-def main():
-    parser = argparse.ArgumentParser(description='Deterministic valid-operation editor/9P soak; writes JSONL.')
-    parser.add_argument('binary', type=Path)
-    parser.add_argument('--seed', type=int, default=4200)
-    parser.add_argument('--transport', choices=['unix', 'tcp'], default='unix')
-    parser.add_argument('--tty', action='store_true', help='run an owned TTY host instead of a detached host')
-    limit = parser.add_mutually_exclusive_group()
-    limit.add_argument('--batches', type=int)
-    limit.add_argument('--duration', type=float, help='seconds, stopping after the current batch')
-    parser.add_argument('--interval', type=float, default=0, help='minimum seconds between batch starts')
-    args = parser.parse_args()
-    if args.batches is None and args.duration is None:
-        args.batches = 100
-    if args.batches is not None and args.batches < 1:
-        parser.error('--batches must be positive')
-    if args.duration is not None and not 0 < args.duration < float('inf'):
-        parser.error('--duration must be finite and positive')
-    if not 0 <= args.interval < float('inf'):
-        parser.error('--interval must be finite and nonnegative')
-    run(args)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/test/look_placement.py b/test/look_placement.py
deleted file mode 100644
index 8a31157f..00000000
--- a/test/look_placement.py
+++ /dev/null
@@ -1,143 +0,0 @@
-#!/usr/bin/env python3
-"""Check narrow-window first-document Look placement in owned SDL/TTY sessions.
-
-python3 -B test/look_placement.py zig-out/column-review/bin/pardes-gui
-python3 -B test/look_placement.py zig-out/column-review/bin/pardes --tty
-
-Starts the classic three-terminal layout, then opens the first document from
-the lower-left or right terminal. Screen-grid geometry must split only that
-terminal, immediately below it, and a repeated Look must reuse the file pane.
-Use --output DIR to retain grid observations and SDL GPU screenshots.
-"""
-import argparse
-from contextlib import nullcontext
-from pathlib import Path
-import tempfile
-
-from fs import session
-from ui_review import capture, panes, require, wait_for
-
-
-def geometry(client, markers):
-    frame = client.screen()
-    width = frame['cols']
-    lines = [''.join(cell[0] for cell in frame['cells'][row * width:(row + 1) * width])
-             for row in range(frame['rows'])]
-    positions = {}
-    for serial, marker in markers.items():
-        hits = [(row, line.index(marker)) for row, line in enumerate(lines) if marker in line]
-        if len(hits) != 1:
-            return None
-        row, offset = hits[0]
-        column_x = 0 if offset < width // 2 else width // 2
-        positions[serial] = (column_x, row)
-    rectangles = {}
-    for serial, (column_x, row) in positions.items():
-        following = [other_y for other_x, other_y in positions.values()
-                     if other_x == column_x and other_y > row]
-        end = min(following, default=frame['rows'])
-        rectangles[serial] = (column_x, row, width // 2, end - row)
-    return frame, rectangles
-
-
-def rectangle_text(frame, rect):
-    x, y, width, height = rect
-    return tuple(tuple(cell[0] for cell in frame['cells'][row * frame['cols'] + x:
-                                                       row * frame['cols'] + x + width])
-                 for row in range(y, y + height))
-
-
-def run_case(args, root, source_index):
-    root.mkdir(parents=True, exist_ok=True, mode=0o700)
-    root.chmod(0o700)
-    config = root / 'config/pardes'
-    config.mkdir(parents=True)
-    (config / 'init').write_text('Shell /bin/sh\nTheme forge\n')
-    target = root / 'opened.txt'
-    contents = b'First document opened from this terminal.\n' * 40
-    target.write_bytes(contents)
-    name = 'look-placement'
-    inherited = {} if args.tty else {
-        'PARDES_TEST': '1', 'PARDES_TEST_COLS': '150', 'PARDES_TEST_ROWS': '48',
-        'PARDES_TEST_CAPTURE_DIR': str(root), 'SDL_VIDEODRIVER': 'x11',
-    }
-    # No document argument: the regression concerns the very first document.
-    launch = ['-c', 'stty cols 150 rows 48; exec "$@"', name,
-              str(args.binary.resolve()), '--9p=' + name, '-n', '3']
-    with session('/bin/sh', root, name, socket_name=name, tty=True,
-                 launch=launch, inherited=inherited) as (client, _):
-        serials = list(panes(client))
-        require(len(serials) == 3, 'classic fixture did not boot three terminals')
-        markers = {}
-        for index, serial in enumerate(serials):
-            pane = f'/pane/{serial}'
-            require('pty' in client.list(pane), 'fixture contains an existing document')
-            marker = f'LP_{index}'
-            markers[serial] = marker
-            client.write(pane + '/tag', b'', truncate=True)
-            client.write(pane + '/tag', f' {marker} Tty Del Collapse'.encode())
-            # Establish non-pristine shells and a stable prompt before measuring.
-            client.write(pane + '/pty/data', f"printf 'ready-{index}\\n'\r".encode())
-            require(wait_for(lambda: f'\nready-{index}\n'.encode() in
-                             client.read(pane + '/body').replace(b'\r', b'')),
-                    'terminal did not execute readiness command')
-        before_frame, before = require(wait_for(lambda: geometry(client, markers)),
-                                       'terminal tags not visible in fixture')
-        source = serials[source_index]
-        source_rect = before[source]
-        require(source_rect[3] >= 8, 'source terminal too short for a local split')
-        require(before[serials[0]][:2] == (0, 2) and before[serials[1]][0] == 0 and
-                before[serials[1]][1] > 2 and before[serials[2]][:2] == (75, 2),
-                f'unexpected initial classic layout: {before}')
-        client.write(f'/pane/{source}/look', f'{target}\n'.encode())
-        opened = require(wait_for(lambda: next((serial for serial in panes(client)
-                                               if serial not in serials), None)),
-                         'Look did not open the first document')
-        markers[opened] = 'opened.txt'
-        after_frame, after = require(wait_for(lambda: geometry(client, markers)),
-                                     'Look pane tags not visible')
-        require(len(panes(client)) == 4, 'Look removed a terminal or added extra panes')
-        x, y, width, height = source_rect
-        require(after[source][:3] == (x, y, width),
-                f'Look moved its originating terminal: {source_rect} -> {after[source]}')
-        require(after[opened][:3] == (x, y + after[source][3], width) and
-                after[source][3] + after[opened][3] == height,
-                f'Look did not split directly below its caller: {after}')
-        for serial in serials:
-            if serial == source:
-                continue
-            require(after[serial] == before[serial],
-                    f'Look resized or moved unrelated terminal {serial}: {before} -> {after}')
-            require(rectangle_text(before_frame, before[serial]) ==
-                    rectangle_text(after_frame, after[serial]),
-                    f'Look changed unrelated terminal {serial} rendered text')
-        require(client.read(f'/pane/{opened}/body') == contents,
-                'opened document contents differ')
-        client.write(f'/pane/{source}/look', f'{target}:2\n'.encode())
-        require(list(panes(client)) == serials + [opened], 'repeated Look created a duplicate pane')
-        require(wait_for(lambda: geometry(client, markers)[1] == after),
-                'repeated Look changed layout')
-        require(target.read_bytes() == contents, 'Look modified the fixture on disk')
-        if args.output:
-            capture(client, root, 'look-below-caller', not args.tty)
-        print(f'{"TTY" if args.tty else "SDL"} source {"lower-left" if source_index == 1 else "right"}: '
-              'local split, unchanged other terminals, first-file contents and re-Look reuse passed', flush=True)
-
-
-def run(args):
-    # Cache-rooted fixtures avoid relying on /tmp quota in developer sessions.
-    cache = Path.home() / '.cache'
-    cache.mkdir(exist_ok=True)
-    context = nullcontext(str(args.output.resolve())) if args.output else tempfile.TemporaryDirectory(
-        prefix='lp-', dir=cache)
-    with context as directory:
-        for source_index, label in [(1, 'left'), (2, 'right')]:
-            run_case(args, Path(directory) / label, source_index)
-
-
-if __name__ == '__main__':
-    parser = argparse.ArgumentParser(description=__doc__)
-    parser.add_argument('binary', type=Path)
-    parser.add_argument('--tty', action='store_true')
-    parser.add_argument('--output', type=Path)
-    run(parser.parse_args())
diff --git a/test/panes.zig b/test/panes.zig
index f7ca9fc5..d7fa3514 100644
--- a/test/panes.zig
+++ b/test/panes.zig
@@ -3134,7 +3134,6 @@ const ImageTests = struct {
     const togglePalette = panes.Image.togglePalette;
     const toggleAscii = panes.Image.toggleAscii;
     const tagPrefix = panes.Image.tagPrefix;
-    const legacySavedPrefix = panes.Image.legacySavedPrefix;
 
     test "pane-local renderer choices are visible in the image tag" {
         var state: State = .{ .path = @constCast("/tmp/picture.ppm") };
@@ -3147,10 +3146,6 @@ const ImageTests = struct {
             config.tag_image ++ " petscii:on palette:terminal ascii:off /tmp/picture.ppm",
             tag,
         );
-        try std.testing.expectEqualStrings(
-            "img /tmp/picture.ppm",
-            legacySavedPrefix(&state, "img /tmp/picture.ppm Keep Del").?,
-        );
     }
 
     test "dump restore propagates malformed embedded image bytes" {
@@ -3173,7 +3168,6 @@ const PdfTests = struct {
     const Point = panes.Pdf.Point;
     const Document = panes.Pdf.Document;
     const isPath = panes.Pdf.isPath;
-    const legacySavedPrefix = panes.Pdf.legacySavedPrefix;
     const State = panes.Pdf.State;
     const probeWord = panes.Pdf.probeWord;
     const pointAtGeometry = panes.Pdf.pointAtGeometry;
@@ -3186,26 +3180,10 @@ const PdfTests = struct {
         try std.testing.expect(!isPath("pdf"));
     }
 
-    test "legacy PDF prefix is delimited by its stable marker and exact path" {
-        const path = "/tmp/a document.pdf";
-        const tag = "pdf 2/9 height PdfFit full PdfTint PdfSections " ++ path ++ " Keep Del";
-        try std.testing.expectEqualStrings(
-            "pdf 2/9 height PdfFit full PdfTint PdfSections " ++ path,
-            legacySavedPrefix(path, tag).?,
-        );
-    }
-
     test "feature-off PDF state is zero-sized" {
         if (!enabled) try std.testing.expectEqual(@as(usize, 0), @sizeOf(State));
     }
 
-    test "compact PDF saved prefix separates page status from editable commands" {
-        const path = "/tmp/a document.pdf";
-        try std.testing.expectEqualStrings(path ++ " [2/9]", legacySavedPrefix(path, path ++ " [2/9] Keep Del").?);
-        try std.testing.expect(legacySavedPrefix(path, path ++ " [oops] Keep Del") == null);
-        try std.testing.expect(legacySavedPrefix(path, path ++ " [2/9/4] Keep Del") == null);
-    }
-
     test "PDF section rows preserve DFS ordinals and sanitise hierarchy" {
         if (!enabled) return;
         const entries = [_]pdf.OutlineEntry{
diff --git a/test/pdf.zig b/test/pdf.zig
index 4cb8f3dd..48869de1 100644
--- a/test/pdf.zig
+++ b/test/pdf.zig
@@ -287,6 +287,7 @@ test "PDF dump fallback remains a byte-preserving file" {
     const saved_panes = [_]dump.Pane{.{
         .kind = .image,
         .tag = "pdf 3/9 height PdfFit full PdfTint PdfSections " ++ path ++ " Keep Del",
+        .tag_tail = " Keep Del",
         .body = "",
         .scroll = 2,
         .cols = 80,