Extract common popup argument building into popupArgStr

Fix #4732

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,17 @@
+## Contribution Policy
+
+We do not accept pull requests generated primarily by AI without genuine understanding or real-world usage context.
+
+All contributions are expected to demonstrate:
+- A clear understanding of the codebase
+- Alignment with product direction
+- Thoughtful reasoning behind changes
+- Evidence of real-world usage or hands-on experience with the problem
+
+If these expectations are not met, we would prefer to implement the changes ourselves rather than spend time reviewing low-effort submissions.
+
+---
+
+## Acknowledgement
+
+- [ ] I confirm that this PR meets the above expectations and reflects my own understanding and real-world context.

.github/workflows/labeler.yml

@@ -12,6 +12,6 @@ jobs:
   label:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/labeler@v5
+      - uses: actions/labeler@v6
         with:
           configuration-path: .github/labeler.yml

.github/workflows/linux.yml

@@ -5,7 +5,7 @@ on:
   push:
     branches: [ master, devel ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, devel ]
   workflow_dispatch:
 
 permissions:

CHANGELOG.md

@@ -1,6 +1,45 @@
 CHANGELOG
 =========
 
+0.71.0
+------
+- Added `--popup` as a new name for `--tmux` with Zellij support
+    - `--popup` starts fzf in a tmux popup or a Zellij floating pane
+    - `--tmux` is now an alias for `--popup`
+    - Requires tmux 3.3+ or Zellij 0.44+
+- Cross-reload item identity with `--id-nth`
+    - Added `--id-nth=NTH` to define item identity fields for cross-reload operations
+    - When a `reload` is triggered with tracking enabled, fzf searches for the tracked item by its identity fields in the new list.
+        - `--track --id-nth ..` tracks by the entire line
+        - `--track --id-nth 1` tracks by the first field
+        - `--track` without `--id-nth` retains the existing index-based tracking behavior
+        - The UI is temporarily blocked (prompt dimmed, input disabled) until the item is found or loading completes.
+            - Press `Escape` or `Ctrl-C` to cancel the blocked state without quitting
+            - Info line shows `+T*` / `+t*` while searching
+    - With `--multi`, selected items are preserved across `reload-sync` by matching their identity fields
+- Performance improvements
+    - The search performance now scales linearly with the number of CPU cores, as we dropped static partitioning to allow better load balancing across threads.
+      ```
+      === query: 'linux' ===
+        [all]   baseline:    17.12ms  current:    14.28ms  (1.20x)  matches: 179966 (12.79%)
+        [1T]    baseline:   136.49ms  current:   137.25ms  (0.99x)  matches: 179966 (12.79%)
+        [2T]    baseline:    75.74ms  current:    68.75ms  (1.10x)  matches: 179966 (12.79%)
+        [4T]    baseline:    41.16ms  current:    34.97ms  (1.18x)  matches: 179966 (12.79%)
+        [8T]    baseline:    32.82ms  current:    17.79ms  (1.84x)  matches: 179966 (12.79%)
+      ```
+    - Improved the cache structure, reducing memory footprint per entry by 86x.
+        - With the reduced per-entry cost, the cache now has broader coverage.
+- Shell integration improvements
+    - bash: CTRL-R now supports multi-select and `shift-delete` to delete history entries (#4715)
+    - fish: Improved command history (CTRL-R) (#4703) (@bitraid)
+- `GET /` HTTP endpoint now includes `positions` field in each match entry, providing the indices of matched characters for external highlighting (#4726)
+- Bug fixes
+    - `--walker=follow` no longer follows symlinks whose target is an ancestor of the walker root, avoiding severe resource exhaustion when a symlink points outside the tree (e.g. Wine's `z:` → `/`) (#4710)
+    - Fixed AWK tokenizer not treating a new line character as whitespace
+    - Fixed `--{accept,with}-nth` removing trailing whitespaces with a non-default `--delimiter`
+    - Fixed OSC8 hyperlinks being mangled when the URL contains unicode characters (#4707)
+    - Fixed `--with-shell` not handling quoted arguments correctly (#4709)
+
 0.70.0
 ------
 - Added `change-with-nth` action for dynamically changing the `--with-nth` option.

man/man1/fzf.1

@@ -415,25 +415,26 @@ layout options so that the specified number of items are visible in the list
 section (default: \fB10+\fR).
 Ignored when \fB\-\-height\fR is not specified or set as an absolute value.
 .TP
-.BI "\-\-tmux" "[=[center|top|bottom|left|right][,SIZE[%]][,SIZE[%]][,border-native]]"
-Start fzf in a tmux popup (default \fBcenter,50%\fR). Requires tmux 3.3 or
-later. This option is ignored if you are not running fzf inside tmux.
+.BI "\-\-popup" "[=[center|top|bottom|left|right][,SIZE[%]][,SIZE[%]][,border-native]]"
+Start fzf in a tmux popup or in a Zellij floating pane (default
+\fBcenter,50%\fR). Requires tmux 3.3+ or Zellij 0.44+. This option is ignored if you
+are not running fzf inside tmux or Zellij. \fB\-\-tmux\fR is an alias for this option.
 
 e.g.
   \fB# Popup in the center with 70% width and height
-  fzf \-\-tmux 70%
+  fzf \-\-popup 70%
 
   # Popup on the left with 40% width and 100% height
-  fzf \-\-tmux right,40%
+  fzf \-\-popup right,40%
 
   # Popup on the bottom with 100% width and 30% height
-  fzf \-\-tmux bottom,30%
+  fzf \-\-popup bottom,30%
 
   # Popup on the top with 80% width and 40% height
-  fzf \-\-tmux top,80%,40%
+  fzf \-\-popup top,80%,40%
 
-  # Popup with a native tmux border in the center with 80% width and height
-  fzf \-\-tmux center,80%,border\-native\fR
+  # Popup with a native tmux or Zellij border in the center with 80% width and height
+  fzf \-\-popup center,80%,border\-native\fR
 
 .SS LAYOUT
 .TP
@@ -617,17 +618,53 @@ Disable multi-line display of items when using \fB\-\-read0\fR
 .B "\-\-raw"
 Enable raw mode where non-matching items are also displayed in a dimmed color.
 .TP
-.B "\-\-track"
+.BI "\-\-track"
 Make fzf track the current selection when the result list is updated.
 This can be useful when browsing logs using fzf with sorting disabled. It is
 not recommended to use this option with \fB\-\-tac\fR as the resulting behavior
-can be confusing. Also, consider using \fBtrack\fR action instead of this
-option.
+can be confusing.
+
+When \fB\-\-id\-nth\fR is also set, fzf enables field\-based tracking across
+\fBreload\fRs. See \fB\-\-id\-nth\fR for details.
+
+Without \fB\-\-id\-nth\fR, \fB\-\-track\fR uses index\-based tracking that
+does not persist across reloads.
 
 .RS
 e.g.
-     \fBgit log \-\-oneline \-\-graph \-\-color=always | nl |
+     \fB# Index\-based tracking (does not persist across reloads)
+     git log \-\-oneline \-\-graph \-\-color=always | nl |
          fzf \-\-ansi \-\-track \-\-no\-sort \-\-layout=reverse\-list\fR
+
+     \fB# Track by first field (e.g. pod name) across reloads
+     kubectl get pods | fzf \-\-track \-\-id\-nth 1 \-\-header\-lines=1 \\
+         \-\-bind 'ctrl\-r:reload:kubectl get pods'\fR
+.RE
+.TP
+.BI "\-\-id\-nth=" "N[,..]"
+Define item identity fields for cross\-reload operations. When set, fzf
+uses the specified fields to identify items across \fBreload\fR and
+\fBreload\-sync\fR.
+
+With \fB\-\-track\fR, fzf extracts the tracking key from the current item
+using the nth expression and searches for a matching item in the reloaded list.
+While searching, the UI is blocked (query input and cursor movement are
+disabled, and the prompt is dimmed). With \fBreload\fR, the blocked state
+clears as soon as the match is found in the stream. With \fBreload\-sync\fR,
+the blocked state persists until the entire stream is complete. Press
+\fBEscape\fR or \fBCtrl\-C\fR to cancel the blocked state without quitting fzf.
+
+The info line shows \fB+T*\fR (or \fB+t*\fR for one\-off tracking) while
+the search is in progress.
+
+With \fB\-\-multi\fR, selected items are preserved across \fBreload\-sync\fR
+by matching their identity fields in the reloaded list.
+
+.RS
+e.g.
+     \fB# Track and preserve selections by pod name across reloads
+     kubectl get pods | fzf \-\-multi \-\-track \-\-id\-nth 1 \-\-header\-lines=1 \\
+         \-\-bind 'ctrl\-r:reload\-sync:kubectl get pods'\fR
 .RE
 .TP
 .B "\-\-tac"

shell/common.sh

@@ -1,9 +1,9 @@
 __fzf_defaults() {
   # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
   # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
-  printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  builtin printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
   command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
-  printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
+  builtin printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
 }
 
 __fzf_exec_awk() {

shell/completion.bash

@@ -161,6 +161,7 @@ _fzf_opts_completion() {
     --history
     --history-size
     --hscroll-off
+    --id-nth
     --info
     --info-command
     --input-border

shell/completion.zsh

@@ -102,9 +102,9 @@ if [[ -o interactive ]]; then
 # the changes. See code comments in "common.sh" for the implementation details.
 
 __fzf_defaults() {
-  printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  builtin printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
   command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
-  printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
+  builtin printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
 }
 
 __fzf_exec_awk() {

shell/key-bindings.bash

@@ -25,9 +25,9 @@ if [[ $- =~ i ]]; then
 # the changes. See code comments in "common.sh" for the implementation details.
 
 __fzf_defaults() {
-  printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  builtin printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
   command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
-  printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
+  builtin printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
 }
 
 __fzf_exec_awk() {
@@ -77,17 +77,31 @@ __fzf_cd__() {
   ) && printf 'builtin cd -- %q' "$(builtin unset CDPATH && builtin cd -- "$dir" && builtin pwd)"
 }
 
+__fzf_history_delete() {
+  [[ -s $1 ]] || return
+
+  local offsets
+  offsets=($(sort -rnu "$1"))
+  for offset in "${offsets[@]}"; do
+    builtin history -d "$offset"
+  done
+}
+
 if command -v perl > /dev/null; then
   __fzf_history__() {
-    local output script
+    local output script deletefile
+    deletefile=$(mktemp)
     script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; s/\n/\n\t/gm; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
     output=$(
       set +o pipefail
       builtin fc -lnr -2147483648 |
         last_hist=$(HISTTIMEFORMAT='' builtin history 1) command perl -n -l0 -e "$script" |
-        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,alt-r:toggle-raw --wrap-sign '"$'\t'"↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} +m --read0") \
+        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,alt-r:toggle-raw --wrap-sign '"$'\t'"↳ ' --highlight-line --bind 'shift-delete:execute-silent(cat {+f1} >> \"$deletefile\")+exclude-multi' --multi ${FZF_CTRL_R_OPTS-} --read0") \
         FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
-    ) || return
+    )
+    __fzf_history_delete "$deletefile"
+    command rm -f "$deletefile"
+    [[ -n $output ]] || return
     READLINE_LINE=$(command perl -pe 's/^\d*\t//' <<< "$output")
     if [[ -z $READLINE_POINT ]]; then
       echo "$READLINE_LINE"
@@ -97,7 +111,8 @@ if command -v perl > /dev/null; then
   }
 else # awk - fallback for POSIX systems
   __fzf_history__() {
-    local output script
+    local output script deletefile
+    deletefile=$(mktemp)
     [[ $(HISTTIMEFORMAT='' builtin history 1) =~ [[:digit:]]+ ]] # how many history entries
     script='function P(b) { ++n; sub(/^[ *]/, "", b); if (!seen[b]++) { printf "%d\t%s%c", '$((BASH_REMATCH + 1))' - n, b, 0 } }
     NR==1 { b = substr($0, 2); next }
@@ -108,9 +123,12 @@ else # awk - fallback for POSIX systems
       set +o pipefail
       builtin fc -lnr -2147483648 2> /dev/null | # ( $'\t '<lines>$'\n' )* ; <lines> ::= [^\n]* ( $'\n'<lines> )*
         __fzf_exec_awk "$script" |               # ( <counter>$'\t'<lines>$'\000' )*
-        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,alt-r:toggle-raw --wrap-sign '"$'\t'"↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} +m --read0") \
+        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,alt-r:toggle-raw --wrap-sign '"$'\t'"↳ ' --highlight-line --bind 'shift-delete:execute-silent(cat {+f1} >> \"$deletefile\")+exclude-multi' --multi ${FZF_CTRL_R_OPTS-} --read0") \
         FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
-    ) || return
+    )
+    __fzf_history_delete "$deletefile"
+    command rm -f "$deletefile"
+    [[ -n $output ]] || return
     READLINE_LINE=${output#*$'\t'}
     if [[ -z $READLINE_POINT ]]; then
       echo "$READLINE_LINE"

shell/key-bindings.zsh

@@ -45,9 +45,9 @@ if [[ -o interactive ]]; then
 # the changes. See code comments in "common.sh" for the implementation details.
 
 __fzf_defaults() {
-  printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  builtin printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
   command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
-  printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
+  builtin printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
 }
 
 __fzf_exec_awk() {
@@ -129,7 +129,7 @@ fi
 # CTRL-R - Paste the selected command from history into the command line
 fzf-history-widget() {
   local selected extracted_with_perl=0
-  setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases no_glob no_ksharrays extendedglob 2> /dev/null
+  setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases no_glob no_sh_glob no_ksharrays extendedglob 2> /dev/null
   # Ensure the module is loaded if not already, and the required features, such
   # as the associative 'history' array, which maps event numbers to full history
   # lines, are set. Also, make sure Perl is installed for multi-line output.

src/algo/algo.go

@@ -323,7 +323,7 @@ func trySkip(input *util.Chars, caseSensitive bool, b byte, from int) int {
 	byteArray := input.Bytes()[from:]
 	// For case-insensitive search of a letter, search for both cases in one pass
 	if !caseSensitive && b >= 'a' && b <= 'z' {
-		idx := indexByteTwo(byteArray, b, b-32)
+		idx := IndexByteTwo(byteArray, b, b-32)
 		if idx < 0 {
 			return -1
 		}

src/algo/indexbyte2_amd64.go

@@ -15,7 +15,7 @@ func cpuHasAVX2() bool
 // or -1 if neither is present. Uses AVX2 when available, SSE2 otherwise.
 //
 //go:noescape
-func indexByteTwo(s []byte, b1, b2 byte) int
+func IndexByteTwo(s []byte, b1, b2 byte) int
 
 // lastIndexByteTwo returns the index of the last occurrence of b1 or b2 in s,
 // or -1 if neither is present. Uses AVX2 when available, SSE2 otherwise.

src/algo/indexbyte2_amd64.s

@@ -41,11 +41,11 @@ cpuid_no:
 	MOVB	$0, ret+0(FP)
 	RET
 
-// func indexByteTwo(s []byte, b1, b2 byte) int
+// func IndexByteTwo(s []byte, b1, b2 byte) int
 //
 // Returns the index of the first occurrence of b1 or b2 in s, or -1.
 // Uses AVX2 (32 bytes/iter) when available, SSE2 (16 bytes/iter) otherwise.
-TEXT ·indexByteTwo(SB),NOSPLIT,$0-40
+TEXT ·IndexByteTwo(SB),NOSPLIT,$0-40
 	MOVQ	s_base+0(FP), SI
 	MOVQ	s_len+8(FP), BX
 	MOVBLZX	b1+24(FP), AX

src/algo/indexbyte2_arm64.go

@@ -7,7 +7,7 @@ package algo
 // to search for both bytes in a single pass.
 //
 //go:noescape
-func indexByteTwo(s []byte, b1, b2 byte) int
+func IndexByteTwo(s []byte, b1, b2 byte) int
 
 // lastIndexByteTwo returns the index of the last occurrence of b1 or b2 in s,
 // or -1 if neither is present. Implemented in assembly using ARM64 NEON,

src/algo/indexbyte2_arm64.s

@@ -1,11 +1,11 @@
 #include "textflag.h"
 
-// func indexByteTwo(s []byte, b1, b2 byte) int
+// func IndexByteTwo(s []byte, b1, b2 byte) int
 //
 // Returns the index of the first occurrence of b1 or b2 in s, or -1.
 // Uses ARM64 NEON to search for both bytes in a single pass over the data.
 // Adapted from Go's internal/bytealg/indexbyte_arm64.s (single-byte version).
-TEXT ·indexByteTwo(SB),NOSPLIT,$0-40
+TEXT ·IndexByteTwo(SB),NOSPLIT,$0-40
 	MOVD	s_base+0(FP), R0
 	MOVD	s_len+8(FP), R2
 	MOVBU	b1+24(FP), R1

src/algo/indexbyte2_other.go

@@ -6,7 +6,7 @@ import "bytes"
 
 // indexByteTwo returns the index of the first occurrence of b1 or b2 in s,
 // or -1 if neither is present.
-func indexByteTwo(s []byte, b1, b2 byte) int {
+func IndexByteTwo(s []byte, b1, b2 byte) int {
 	i1 := bytes.IndexByte(s, b1)
 	if i1 == 0 {
 		return 0

src/algo/indexbyte2_test.go

@@ -28,9 +28,9 @@ func TestIndexByteTwo(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got := indexByteTwo([]byte(tt.s), tt.b1, tt.b2)
+			got := IndexByteTwo([]byte(tt.s), tt.b1, tt.b2)
 			if got != tt.want {
-				t.Errorf("indexByteTwo(%q, %c, %c) = %d, want %d", tt.s[:min(len(tt.s), 40)], tt.b1, tt.b2, got, tt.want)
+				t.Errorf("IndexByteTwo(%q, %c, %c) = %d, want %d", tt.s[:min(len(tt.s), 40)], tt.b1, tt.b2, got, tt.want)
 			}
 		})
 	}
@@ -46,27 +46,27 @@ func TestIndexByteTwo(t *testing.T) {
 		for pos := 0; pos < n; pos++ {
 			for _, b := range []byte{'A', 'B'} {
 				data[pos] = b
-				got := indexByteTwo(data, 'A', 'B')
+				got := IndexByteTwo(data, 'A', 'B')
 				want := loopIndexByteTwo(data, 'A', 'B')
 				if got != want {
-					t.Fatalf("indexByteTwo(len=%d, match=%c@%d) = %d, want %d", n, b, pos, got, want)
+					t.Fatalf("IndexByteTwo(len=%d, match=%c@%d) = %d, want %d", n, b, pos, got, want)
 				}
 				data[pos] = byte('c' + (pos % 20))
 			}
 		}
 		// Test with no match
-		got := indexByteTwo(data, 'A', 'B')
+		got := IndexByteTwo(data, 'A', 'B')
 		if got != -1 {
-			t.Fatalf("indexByteTwo(len=%d, no match) = %d, want -1", n, got)
+			t.Fatalf("IndexByteTwo(len=%d, no match) = %d, want -1", n, got)
 		}
 		// Test with both bytes present
 		if n >= 2 {
 			data[n/3] = 'A'
 			data[n*2/3] = 'B'
-			got := indexByteTwo(data, 'A', 'B')
+			got := IndexByteTwo(data, 'A', 'B')
 			want := loopIndexByteTwo(data, 'A', 'B')
 			if got != want {
-				t.Fatalf("indexByteTwo(len=%d, both@%d,%d) = %d, want %d", n, n/3, n*2/3, got, want)
+				t.Fatalf("IndexByteTwo(len=%d, both@%d,%d) = %d, want %d", n, n/3, n*2/3, got, want)
 			}
 			data[n/3] = byte('c' + ((n / 3) % 20))
 			data[n*2/3] = byte('c' + ((n * 2 / 3) % 20))
@@ -147,10 +147,10 @@ func FuzzIndexByteTwo(f *testing.F) {
 	f.Add([]byte(""), byte('a'), byte('b'))
 	f.Add([]byte("aaa"), byte('a'), byte('a'))
 	f.Fuzz(func(t *testing.T, data []byte, b1, b2 byte) {
-		got := indexByteTwo(data, b1, b2)
+		got := IndexByteTwo(data, b1, b2)
 		want := loopIndexByteTwo(data, b1, b2)
 		if got != want {
-			t.Errorf("indexByteTwo(len=%d, b1=%d, b2=%d) = %d, want %d", len(data), b1, b2, got, want)
+			t.Errorf("IndexByteTwo(len=%d, b1=%d, b2=%d) = %d, want %d", len(data), b1, b2, got, want)
 		}
 	})
 }
@@ -214,7 +214,7 @@ func benchIndexByteTwo(b *testing.B, size int, pos int) {
 		fn   func([]byte, byte, byte) int
 	}
 	impls := []impl{
-		{"asm", indexByteTwo},
+		{"asm", IndexByteTwo},
 		{"2xIndexByte", refIndexByteTwo},
 		{"loop", loopIndexByteTwo},
 	}

src/ansi.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 	"unicode/utf8"
 
+	"github.com/junegunn/fzf/src/algo"
 	"github.com/junegunn/fzf/src/tui"
 )
 
@@ -123,31 +124,31 @@ func toAnsiString(color tui.Color, offset int) string {
 	return ret + ";"
 }
 
-func isPrint(c uint8) bool {
-	return '\x20' <= c && c <= '\x7e'
-}
-
 func matchOperatingSystemCommand(s string, start int) int {
 	// `\x1b][0-9][;:][[:print:]]+(?:\x1b\\\\|\x07)`
 	//                 ^ match starting here after the first printable character
 	//
 	i := start // prefix matched in nextAnsiEscapeSequence()
-	for ; i < len(s) && isPrint(s[i]); i++ {
+
+	// Find the terminator: BEL (\x07) or ESC (\x1b) for ST (\x1b\\)
+	idx := algo.IndexByteTwo(stringBytes(s[i:]), '\x07', '\x1b')
+	if idx < 0 {
+		return -1
 	}
-	if i < len(s) {
-		if s[i] == '\x07' {
-			return i + 1
-		}
-		// `\x1b]8;PARAMS;URI\x1b\\TITLE\x1b]8;;\x1b`
-		//                   ------
-		if s[i] == '\x1b' && i < len(s)-1 && s[i+1] == '\\' {
-			return i + 2
-		}
+	i += idx
+
+	if s[i] == '\x07' {
+		return i + 1
+	}
+	// `\x1b]8;PARAMS;URI\x1b\\TITLE\x1b]8;;\x1b`
+	//                   ------
+	if i < len(s)-1 && s[i+1] == '\\' {
+		return i + 2
 	}
 
 	// `\x1b]8;PARAMS;URI\x1b\\TITLE\x1b]8;;\x1b`
 	//                              ------------
-	if i < len(s) && s[:i+1] == "\x1b]8;;\x1b" {
+	if s[:i+1] == "\x1b]8;;\x1b" {
 		return i + 1
 	}
 
@@ -233,7 +234,7 @@ Loop:
 
 				// \x1b][0-9]+[;:][[:print:]]+(?:\x1b\\\\|\x07)
 				//            ---------------
-				if j > 2 && i+j+1 < len(s) && (s[i+j] == ';' || s[i+j] == ':') && isPrint(s[i+j+1]) {
+				if j > 2 && i+j+1 < len(s) && (s[i+j] == ';' || s[i+j] == ':') && s[i+j+1] >= '\x20' {
 					if k := matchOperatingSystemCommand(s[i:], j+2); k != -1 {
 						return i, i + k
 					}

src/cache.go

@@ -2,10 +2,13 @@ package fzf
 
 import "sync"
 
-// queryCache associates strings to lists of items
-type queryCache map[string][]Result
+// ChunkBitmap is a bitmap with one bit per item in a chunk.
+type ChunkBitmap [chunkBitWords]uint64
 
-// ChunkCache associates Chunk and query string to lists of items
+// queryCache associates query strings to bitmaps of matching items
+type queryCache map[string]ChunkBitmap
+
+// ChunkCache associates Chunk and query string to bitmaps
 type ChunkCache struct {
 	mutex sync.Mutex
 	cache map[*Chunk]*queryCache
@@ -30,9 +33,9 @@ func (cc *ChunkCache) retire(chunk ...*Chunk) {
 	cc.mutex.Unlock()
 }
 
-// Add adds the list to the cache
-func (cc *ChunkCache) Add(chunk *Chunk, key string, list []Result) {
-	if len(key) == 0 || !chunk.IsFull() || len(list) > queryCacheMax {
+// Add stores the bitmap for the given chunk and key
+func (cc *ChunkCache) Add(chunk *Chunk, key string, bitmap ChunkBitmap, matchCount int) {
+	if len(key) == 0 || !chunk.IsFull() || matchCount > queryCacheMax {
 		return
 	}
 
@@ -44,11 +47,11 @@ func (cc *ChunkCache) Add(chunk *Chunk, key string, list []Result) {
 		cc.cache[chunk] = &queryCache{}
 		qc = cc.cache[chunk]
 	}
-	(*qc)[key] = list
+	(*qc)[key] = bitmap
 }
 
-// Lookup is called to lookup ChunkCache
-func (cc *ChunkCache) Lookup(chunk *Chunk, key string) []Result {
+// Lookup returns the bitmap for the exact key
+func (cc *ChunkCache) Lookup(chunk *Chunk, key string) *ChunkBitmap {
 	if len(key) == 0 || !chunk.IsFull() {
 		return nil
 	}
@@ -58,15 +61,15 @@ func (cc *ChunkCache) Lookup(chunk *Chunk, key string) []Result {
 
 	qc, ok := cc.cache[chunk]
 	if ok {
-		list, ok := (*qc)[key]
-		if ok {
-			return list
+		if bm, ok := (*qc)[key]; ok {
+			return &bm
 		}
 	}
 	return nil
 }
 
-func (cc *ChunkCache) Search(chunk *Chunk, key string) []Result {
+// Search finds the bitmap for the longest prefix or suffix of the key
+func (cc *ChunkCache) Search(chunk *Chunk, key string) *ChunkBitmap {
 	if len(key) == 0 || !chunk.IsFull() {
 		return nil
 	}
@@ -86,8 +89,8 @@ func (cc *ChunkCache) Search(chunk *Chunk, key string) []Result {
 		prefix := key[:len(key)-idx]
 		suffix := key[idx:]
 		for _, substr := range [2]string{prefix, suffix} {
-			if cached, found := (*qc)[substr]; found {
-				return cached
+			if bm, found := (*qc)[substr]; found {
+				return &bm
 			}
 		}
 	}

src/cache_test.go

@@ -6,34 +6,34 @@ func TestChunkCache(t *testing.T) {
 	cache := NewChunkCache()
 	chunk1p := &Chunk{}
 	chunk2p := &Chunk{count: chunkSize}
-	items1 := []Result{{}}
-	items2 := []Result{{}, {}}
-	cache.Add(chunk1p, "foo", items1)
-	cache.Add(chunk2p, "foo", items1)
-	cache.Add(chunk2p, "bar", items2)
+	bm1 := ChunkBitmap{1}
+	bm2 := ChunkBitmap{1, 2}
+	cache.Add(chunk1p, "foo", bm1, 1)
+	cache.Add(chunk2p, "foo", bm1, 1)
+	cache.Add(chunk2p, "bar", bm2, 2)
 
 	{ // chunk1 is not full
 		cached := cache.Lookup(chunk1p, "foo")
 		if cached != nil {
-			t.Error("Cached disabled for non-empty chunks", cached)
+			t.Error("Cached disabled for non-full chunks", cached)
 		}
 	}
 	{
 		cached := cache.Lookup(chunk2p, "foo")
-		if cached == nil || len(cached) != 1 {
-			t.Error("Expected 1 item cached", cached)
+		if cached == nil || cached[0] != 1 {
+			t.Error("Expected bitmap cached", cached)
 		}
 	}
 	{
 		cached := cache.Lookup(chunk2p, "bar")
-		if cached == nil || len(cached) != 2 {
-			t.Error("Expected 2 items cached", cached)
+		if cached == nil || cached[1] != 2 {
+			t.Error("Expected bitmap cached", cached)
 		}
 	}
 	{
 		cached := cache.Lookup(chunk1p, "foobar")
 		if cached != nil {
-			t.Error("Expected 0 item cached", cached)
+			t.Error("Expected nil cached", cached)
 		}
 	}
 }

src/constants.go

@@ -34,19 +34,18 @@ const (
 	maxBgProcessesPerAction = 3
 
 	// Matcher
-	numPartitionsMultiplier = 8
-	maxPartitions           = 32
-	progressMinDuration     = 200 * time.Millisecond
+	progressMinDuration = 200 * time.Millisecond
 
 	// Capacity of each chunk
-	chunkSize int = 1000
+	chunkSize     int = 1024
+	chunkBitWords     = (chunkSize + 63) / 64
 
 	// Pre-allocated memory slices to minimize GC
 	slab16Size int = 100 * 1024 // 200KB * 32 = 12.8MB
 	slab32Size int = 2048       // 8KB * 32 = 256KB
 
 	// Do not cache results of low selectivity queries
-	queryCacheMax int = chunkSize / 5
+	queryCacheMax int = chunkSize / 2
 
 	// Not to cache mergers with large lists
 	mergerCacheMax int = 100000

src/core.go

@@ -56,6 +56,9 @@ func Run(opts *Options) (int, error) {
 		if opts.useTmux() {
 			return runTmux(os.Args, opts)
 		}
+		if opts.useZellij() {
+			return runZellij(os.Args, opts)
+		}
 
 		if needWinpty(opts) {
 			return runWinpty(os.Args, opts)
@@ -195,11 +198,13 @@ func Run(opts *Options) (int, error) {
 	// Reader
 	streamingFilter := opts.Filter != nil && !sort && !opts.Tac && !opts.Sync && opts.Bench == 0
 	var reader *Reader
+	var ingestionStart time.Time
 	if !streamingFilter {
 		reader = NewReader(func(data []byte) bool {
 			return chunkList.Push(data)
 		}, eventBox, executor, opts.ReadZero, opts.Filter == nil)
 
+		ingestionStart = time.Now()
 		readyChan := make(chan bool)
 		go reader.ReadSource(opts.Input, opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip, initialReload, initialEnv, readyChan)
 		<-readyChan
@@ -283,6 +288,7 @@ func Run(opts *Options) (int, error) {
 		} else {
 			eventBox.Unwatch(EvtReadNew)
 			eventBox.WaitFor(EvtReadFin)
+			ingestionTime := time.Since(ingestionStart)
 
 			// NOTE: Streaming filter is inherently not compatible with --tail
 			snapshot, _, _ := chunkList.Snapshot(opts.Tail)
@@ -316,13 +322,14 @@ func Run(opts *Options) (int, error) {
 				}
 				avg := total / time.Duration(len(times))
 				selectivity := float64(matchCount) / float64(totalItems) * 100
-				fmt.Printf("  %d iterations  avg: %.2fms  min: %.2fms  max: %.2fms  total: %.2fs  items: %d  matches: %d (%.2f%%)\n",
+				fmt.Printf("  %d iterations  avg: %.2fms  min: %.2fms  max: %.2fms  total: %.2fs  items: %d  matches: %d (%.2f%%)  ingestion: %.2fms\n",
 					len(times),
 					float64(avg.Microseconds())/1000,
 					float64(minD.Microseconds())/1000,
 					float64(maxD.Microseconds())/1000,
 					total.Seconds(),
-					totalItems, matchCount, selectivity)
+					totalItems, matchCount, selectivity,
+					float64(ingestionTime.Microseconds())/1000)
 				return ExitOk, nil
 			}
 
@@ -465,7 +472,9 @@ func Run(opts *Options) (int, error) {
 					if heightUnknown && !deferred {
 						determine(!reading)
 					}
-					matcher.Reset(snapshot, input(), false, !reading, sort, snapshotRevision)
+					if !useSnapshot || evt == EvtReadFin {
+						matcher.Reset(snapshot, input(), false, !reading, sort, snapshotRevision)
+					}
 
 				case EvtSearchNew:
 					var command *commandSpec

src/matcher.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"runtime"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
@@ -57,7 +58,7 @@ const (
 // NewMatcher returns a new Matcher
 func NewMatcher(cache *ChunkCache, patternBuilder func([]rune) *Pattern,
 	sort bool, tac bool, eventBox *util.EventBox, revision revision, threads int) *Matcher {
-	partitions := min(numPartitionsMultiplier*runtime.NumCPU(), maxPartitions)
+	partitions := runtime.NumCPU()
 	if threads > 0 {
 		partitions = threads
 	}
@@ -148,27 +149,6 @@ func (m *Matcher) Loop() {
 	}
 }
 
-func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
-	partitions := m.partitions
-	perSlice := len(chunks) / partitions
-
-	if perSlice == 0 {
-		partitions = len(chunks)
-		perSlice = 1
-	}
-
-	slices := make([][]*Chunk, partitions)
-	for i := 0; i < partitions; i++ {
-		start := i * perSlice
-		end := start + perSlice
-		if i == partitions-1 {
-			end = len(chunks)
-		}
-		slices[i] = chunks[start:end]
-	}
-	return slices
-}
-
 type partialResult struct {
 	index   int
 	matches []Result
@@ -192,39 +172,37 @@ func (m *Matcher) scan(request MatchRequest) MatchResult {
 	maxIndex := request.chunks[numChunks-1].lastIndex(minIndex)
 	cancelled := util.NewAtomicBool(false)
 
-	slices := m.sliceChunks(request.chunks)
-	numSlices := len(slices)
-	resultChan := make(chan partialResult, numSlices)
+	numWorkers := min(m.partitions, numChunks)
+	var nextChunk atomic.Int32
+	resultChan := make(chan partialResult, numWorkers)
 	countChan := make(chan int, numChunks)
 	waitGroup := sync.WaitGroup{}
 
-	for idx, chunks := range slices {
+	for idx := range numWorkers {
 		waitGroup.Add(1)
 		if m.slab[idx] == nil {
 			m.slab[idx] = util.MakeSlab(slab16Size, slab32Size)
 		}
-		go func(idx int, slab *util.Slab, chunks []*Chunk) {
-			defer func() { waitGroup.Done() }()
-			count := 0
-			allMatches := make([][]Result, len(chunks))
-			for idx, chunk := range chunks {
-				matches := request.pattern.Match(chunk, slab)
-				allMatches[idx] = matches
-				count += len(matches)
+		go func(idx int, slab *util.Slab) {
+			defer waitGroup.Done()
+			var matches []Result
+			for {
+				ci := int(nextChunk.Add(1)) - 1
+				if ci >= numChunks {
+					break
+				}
+				chunkMatches := request.pattern.Match(request.chunks[ci], slab)
+				matches = append(matches, chunkMatches...)
 				if cancelled.Get() {
 					return
 				}
-				countChan <- len(matches)
-			}
-			sliceMatches := make([]Result, 0, count)
-			for _, matches := range allMatches {
-				sliceMatches = append(sliceMatches, matches...)
+				countChan <- len(chunkMatches)
 			}
 			if m.sort && request.pattern.sortable {
-				m.sortBuf[idx] = radixSortResults(sliceMatches, m.tac, m.sortBuf[idx])
+				m.sortBuf[idx] = radixSortResults(matches, m.tac, m.sortBuf[idx])
 			}
-			resultChan <- partialResult{idx, sliceMatches}
-		}(idx, m.slab[idx], chunks)
+			resultChan <- partialResult{idx, matches}
+		}(idx, m.slab[idx])
 	}
 
 	wait := func() bool {
@@ -252,8 +230,8 @@ func (m *Matcher) scan(request MatchRequest) MatchResult {
 		}
 	}
 
-	partialResults := make([][]Result, numSlices)
-	for range slices {
+	partialResults := make([][]Result, numWorkers)
+	for range numWorkers {
 		partialResult := <-resultChan
 		partialResults[partialResult.index] = partialResult.matches
 	}

src/merger.go

@@ -136,14 +136,7 @@ func (mg *Merger) Get(idx int) Result {
 	if mg.tac {
 		idx = mg.count - idx - 1
 	}
-	for _, list := range mg.lists {
-		numItems := len(list)
-		if idx < numItems {
-			return list[idx]
-		}
-		idx -= numItems
-	}
-	panic(fmt.Sprintf("Index out of bounds (unsorted, %d/%d)", idx, mg.count))
+	return mg.mergedGet(idx)
 }
 
 func (mg *Merger) ToMap() map[int32]Result {
@@ -171,7 +164,7 @@ func (mg *Merger) mergedGet(idx int) Result {
 			}
 			if cursor >= 0 {
 				rank := list[cursor]
-				if minIdx < 0 || compareRanks(rank, minRank, mg.tac) {
+				if minIdx < 0 || mg.sorted && compareRanks(rank, minRank, mg.tac) || !mg.sorted && rank.item.Index() < minRank.item.Index() {
 					minRank = rank
 					minIdx = listIdx
 				}

src/merger_test.go

@@ -54,10 +54,25 @@ func buildLists(partiallySorted bool) ([][]Result, []Result) {
 }
 
 func TestMergerUnsorted(t *testing.T) {
-	lists, items := buildLists(false)
+	lists, _ := buildLists(false)
+
+	// Sort each list by index to simulate real worker behavior
+	// (workers process chunks in ascending order via nextChunk.Add(1))
+	for _, list := range lists {
+		sort.Slice(list, func(i, j int) bool {
+			return list[i].item.Index() < list[j].item.Index()
+		})
+	}
+	items := []Result{}
+	for _, list := range lists {
+		items = append(items, list...)
+	}
+	sort.Slice(items, func(i, j int) bool {
+		return items[i].item.Index() < items[j].item.Index()
+	})
 	cnt := len(items)
 
-	// Not sorted: same order
+	// Not sorted: items in ascending index order
 	mg := NewMerger(nil, lists, false, false, revision{}, 0, 0)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	for i := range cnt {

src/options.go

@@ -75,9 +75,10 @@ Usage: fzf [options]
     --min-height=HEIGHT[+]   Minimum height when --height is given as a percentage.
                              Add '+' to automatically increase the value
                              according to the other layout options (default: 10+).
-    --tmux[=OPTS]            Start fzf in a tmux popup (requires tmux 3.3+)
+    --popup[=OPTS]           Start fzf in a popup window (requires tmux 3.3+ or Zellij 0.44+)
                              [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
                              [,border-native] (default: center,50%)
+    --tmux[=OPTS]            Alias for --popup
 
   LAYOUT
     --layout=LAYOUT          Choose layout: [default|reverse|reverse-list]
@@ -101,6 +102,7 @@ Usage: fzf [options]
     --no-multi-line          Disable multi-line display of items when using --read0
     --raw                    Enable raw mode (show non-matching items)
     --track                  Track the current selection when the result is updated
+    --id-nth=N[,..]          Define item identity fields for cross-reload operations
     --tac                    Reverse the order of the input
     --gap[=N]                Render empty lines between each item
     --gap-line[=STR]         Draw horizontal line on each gap using the string
@@ -416,7 +418,7 @@ func parseTmuxOptions(arg string, index int) (*tmuxOptions, error) {
 	var err error
 	opts := defaultTmuxOptions(index)
 	tokens := splitRegexp.Split(arg, -1)
-	errorToReturn := errors.New("invalid tmux option: " + arg + " (expected: [center|top|bottom|left|right][,SIZE[%]][,SIZE[%][,border-native]])")
+	errorToReturn := errors.New("invalid popup option: " + arg + " (expected: [center|top|bottom|left|right][,SIZE[%]][,SIZE[%][,border-native]])")
 	if len(tokens) == 0 || len(tokens) > 4 {
 		return nil, errorToReturn
 	}
@@ -594,6 +596,7 @@ type Options struct {
 	Sort              int
 	Raw               bool
 	Track             trackOption
+	IdNth             []Range
 	Tac               bool
 	Tail              int
 	Criteria          []criterion
@@ -1610,7 +1613,7 @@ func parseWalkerOpts(str string) (walkerOpts, error) {
 }
 
 var (
-	executeRegexp    *regexp.Regexp
+	argActionRegexp  *regexp.Regexp
 	splitRegexp      *regexp.Regexp
 	actionNameRegexp *regexp.Regexp
 )
@@ -1629,7 +1632,7 @@ const (
 )
 
 func init() {
-	executeRegexp = regexp.MustCompile(
+	argActionRegexp = regexp.MustCompile(
 		`(?si)[:+](become|execute(?:-multi|-silent)?|reload(?:-sync)?|preview|(?:change|bg-transform|transform)-(?:query|prompt|(?:border|list|preview|input|header|footer)-label|header-lines|header|footer|search|with-nth|nth|pointer|ghost)|bg-transform|transform|change-(?:preview-window|preview|multi)|(?:re|un|toggle-)bind|pos|put|print|search|trigger)`)
 	splitRegexp = regexp.MustCompile("[,:]+")
 	actionNameRegexp = regexp.MustCompile("(?i)^[a-z-]+")
@@ -1639,7 +1642,7 @@ func maskActionContents(action string) string {
 	masked := ""
 Loop:
 	for len(action) > 0 {
-		loc := executeRegexp.FindStringIndex(action)
+		loc := argActionRegexp.FindStringIndex(action)
 		if loc == nil {
 			masked += action
 			break
@@ -1694,7 +1697,7 @@ Loop:
 }
 
 func parseSingleActionList(str string) ([]*action, error) {
-	// We prepend a colon to satisfy executeRegexp and remove it later
+	// We prepend a colon to satisfy argActionRegexp and remove it later
 	masked := maskActionContents(":" + str)[1:]
 	return parseActionList(masked, str, []*action{}, false)
 }
@@ -2634,7 +2637,7 @@ func parseOptions(index *int, opts *Options, allArgs []string) error {
 			opts.Version = true
 		case "--no-winpty":
 			opts.NoWinpty = true
-		case "--tmux":
+		case "--tmux", "--popup":
 			given, str := optionalNextString()
 			if given {
 				if opts.Tmux, err = parseTmuxOptions(str, index); err != nil {
@@ -2643,7 +2646,7 @@ func parseOptions(index *int, opts *Options, allArgs []string) error {
 			} else {
 				opts.Tmux = defaultTmuxOptions(index)
 			}
-		case "--no-tmux":
+		case "--no-tmux", "--no-popup":
 			opts.Tmux = nil
 		case "--tty-default":
 			if opts.TtyDefault, err = nextString("tty device name required"); err != nil {
@@ -2811,6 +2814,16 @@ func parseOptions(index *int, opts *Options, allArgs []string) error {
 			opts.Track = trackEnabled
 		case "--no-track":
 			opts.Track = trackDisabled
+		case "--id-nth":
+			str, err := nextString("nth expression required")
+			if err != nil {
+				return err
+			}
+			if opts.IdNth, err = splitNth(str); err != nil {
+				return err
+			}
+		case "--no-id-nth":
+			opts.IdNth = nil
 		case "--tac":
 			opts.Tac = true
 		case "--no-tac":
@@ -3615,6 +3628,10 @@ func (opts *Options) useTmux() bool {
 	return opts.Tmux != nil && len(os.Getenv("TMUX")) > 0 && opts.Tmux.index >= opts.Height.index
 }
 
+func (opts *Options) useZellij() bool {
+	return opts.Tmux != nil && len(os.Getenv("ZELLIJ")) > 0 && opts.Tmux.index >= opts.Height.index
+}
+
 func (opts *Options) noSeparatorLine() bool {
 	if opts.Inputless {
 		return true

src/pattern.go

@@ -61,7 +61,7 @@ type Pattern struct {
 	delimiter     Delimiter
 	nth           []Range
 	revision      revision
-	procFun       map[termType]algo.Algo
+	procFun       [6]algo.Algo
 	cache         *ChunkCache
 	denylist      map[int32]struct{}
 	startIndex    int32
@@ -150,7 +150,7 @@ func BuildPattern(cache *ChunkCache, patternCache map[string]*Pattern, fuzzy boo
 		cache:         cache,
 		denylist:      denylist,
 		startIndex:    startIndex,
-		procFun:       make(map[termType]algo.Algo)}
+	}
 
 	ptr.cacheKey = ptr.buildCacheKey()
 	ptr.directAlgo, ptr.directTerm = ptr.buildDirectAlgo(fuzzyAlgo)
@@ -300,104 +300,87 @@ func (p *Pattern) CacheKey() string {
 
 // Match returns the list of matches Items in the given Chunk
 func (p *Pattern) Match(chunk *Chunk, slab *util.Slab) []Result {
-	// ChunkCache: Exact match
 	cacheKey := p.CacheKey()
+
+	// Bitmap cache: exact match or prefix/suffix
+	var cachedBitmap *ChunkBitmap
 	if p.cacheable {
-		if cached := p.cache.Lookup(chunk, cacheKey); cached != nil {
-			return cached
-		}
+		cachedBitmap = p.cache.Lookup(chunk, cacheKey)
+	}
+	if cachedBitmap == nil {
+		cachedBitmap = p.cache.Search(chunk, cacheKey)
 	}
 
-	// Prefix/suffix cache
-	space := p.cache.Search(chunk, cacheKey)
-
-	matches := p.matchChunk(chunk, space, slab)
+	matches, bitmap := p.matchChunk(chunk, cachedBitmap, slab)
 
 	if p.cacheable {
-		p.cache.Add(chunk, cacheKey, matches)
+		p.cache.Add(chunk, cacheKey, bitmap, len(matches))
 	}
 	return matches
 }
 
-func (p *Pattern) matchChunk(chunk *Chunk, space []Result, slab *util.Slab) []Result {
+func (p *Pattern) matchChunk(chunk *Chunk, cachedBitmap *ChunkBitmap, slab *util.Slab) ([]Result, ChunkBitmap) {
 	matches := []Result{}
+	var bitmap ChunkBitmap
 
 	// Skip header items in chunks that contain them
 	startIdx := 0
 	if p.startIndex > 0 && chunk.count > 0 && chunk.items[0].Index() < p.startIndex {
 		startIdx = int(p.startIndex - chunk.items[0].Index())
 		if startIdx >= chunk.count {
-			return matches
+			return matches, bitmap
 		}
 	}
 
+	hasCachedBitmap := cachedBitmap != nil
+
 	// Fast path: single fuzzy term, no nth, no denylist.
 	// Calls the algo function directly, bypassing MatchItem/extendedMatch/iter
 	// and avoiding per-match []Offset heap allocation.
 	if p.directAlgo != nil && len(p.denylist) == 0 {
 		t := p.directTerm
-		if space == nil {
-			for idx := startIdx; idx < chunk.count; idx++ {
-				res, _ := p.directAlgo(t.caseSensitive, t.normalize, p.forward,
-					&chunk.items[idx].text, t.text, p.withPos, slab)
-				if res.Start >= 0 {
-					matches = append(matches, buildResultFromBounds(
-						&chunk.items[idx], res.Score,
-						int(res.Start), int(res.End), int(res.End), true))
-				}
+		for idx := startIdx; idx < chunk.count; idx++ {
+			if hasCachedBitmap && cachedBitmap[idx/64]&(uint64(1)<<(idx%64)) == 0 {
+				continue
 			}
-		} else {
-			for _, result := range space {
-				res, _ := p.directAlgo(t.caseSensitive, t.normalize, p.forward,
-					&result.item.text, t.text, p.withPos, slab)
-				if res.Start >= 0 {
-					matches = append(matches, buildResultFromBounds(
-						result.item, res.Score,
-						int(res.Start), int(res.End), int(res.End), true))
-				}
+			res, _ := p.directAlgo(t.caseSensitive, t.normalize, p.forward,
+				&chunk.items[idx].text, t.text, p.withPos, slab)
+			if res.Start >= 0 {
+				bitmap[idx/64] |= uint64(1) << (idx % 64)
+				matches = append(matches, buildResultFromBounds(
+					&chunk.items[idx], res.Score,
+					int(res.Start), int(res.End), int(res.End), true))
 			}
 		}
-		return matches
+		return matches, bitmap
 	}
 
 	if len(p.denylist) == 0 {
-		// Huge code duplication for minimizing unnecessary map lookups
-		if space == nil {
-			for idx := startIdx; idx < chunk.count; idx++ {
-				if match, _, _ := p.MatchItem(&chunk.items[idx], p.withPos, slab); match.item != nil {
-					matches = append(matches, match)
-				}
-			}
-		} else {
-			for _, result := range space {
-				if match, _, _ := p.MatchItem(result.item, p.withPos, slab); match.item != nil {
-					matches = append(matches, match)
-				}
-			}
-		}
-		return matches
-	}
-
-	if space == nil {
 		for idx := startIdx; idx < chunk.count; idx++ {
-			if _, prs := p.denylist[chunk.items[idx].Index()]; prs {
+			if hasCachedBitmap && cachedBitmap[idx/64]&(uint64(1)<<(idx%64)) == 0 {
 				continue
 			}
 			if match, _, _ := p.MatchItem(&chunk.items[idx], p.withPos, slab); match.item != nil {
+				bitmap[idx/64] |= uint64(1) << (idx % 64)
 				matches = append(matches, match)
 			}
 		}
-	} else {
-		for _, result := range space {
-			if _, prs := p.denylist[result.item.Index()]; prs {
-				continue
-			}
-			if match, _, _ := p.MatchItem(result.item, p.withPos, slab); match.item != nil {
-				matches = append(matches, match)
-			}
+		return matches, bitmap
+	}
+
+	for idx := startIdx; idx < chunk.count; idx++ {
+		if hasCachedBitmap && cachedBitmap[idx/64]&(uint64(1)<<(idx%64)) == 0 {
+			continue
+		}
+		if _, prs := p.denylist[chunk.items[idx].Index()]; prs {
+			continue
+		}
+		if match, _, _ := p.MatchItem(&chunk.items[idx], p.withPos, slab); match.item != nil {
+			bitmap[idx/64] |= uint64(1) << (idx % 64)
+			matches = append(matches, match)
 		}
 	}
-	return matches
+	return matches, bitmap
 }
 
 // MatchItem returns the match result if the Item is a match.

src/pattern_test.go

@@ -2,6 +2,7 @@ package fzf
 
 import (
 	"reflect"
+	"runtime"
 	"testing"
 
 	"github.com/junegunn/fzf/src/algo"
@@ -137,7 +138,7 @@ func TestOrigTextAndTransformed(t *testing.T) {
 			origText:    &origBytes,
 			transformed: &transformed{pattern.revision, trans}}
 		pattern.extended = extended
-		matches := pattern.matchChunk(&chunk, nil, slab) // No cache
+		matches, _ := pattern.matchChunk(&chunk, nil, slab) // No cache
 		if !(matches[0].item.text.ToString() == "junegunn" &&
 			string(*matches[0].item.origText) == "junegunn.choi" &&
 			reflect.DeepEqual((*matches[0].item.transformed).tokens, trans)) {
@@ -199,3 +200,119 @@ func TestCacheable(t *testing.T) {
 	test(false, "foo 'bar", "foo", false)
 	test(false, "foo !bar", "foo", false)
 }
+
+func buildChunks(numChunks int) []*Chunk {
+	chunks := make([]*Chunk, numChunks)
+	words := []string{
+		"src/main/java/com/example/service/UserService.java",
+		"src/test/java/com/example/service/UserServiceTest.java",
+		"docs/api/reference/endpoints.md",
+		"lib/internal/utils/string_helper.go",
+		"pkg/server/http/handler/auth.go",
+		"build/output/release/app.exe",
+		"config/production/database.yml",
+		"scripts/deploy/kubernetes/setup.sh",
+		"vendor/github.com/junegunn/fzf/src/core.go",
+		"node_modules/.cache/babel/transform.js",
+	}
+	for ci := range numChunks {
+		chunks[ci] = &Chunk{count: chunkSize}
+		for i := range chunkSize {
+			text := words[(ci*chunkSize+i)%len(words)]
+			chunks[ci].items[i] = Item{text: util.ToChars([]byte(text))}
+			chunks[ci].items[i].text.Index = int32(ci*chunkSize + i)
+		}
+	}
+	return chunks
+}
+
+func buildPatternWith(cache *ChunkCache, runes []rune) *Pattern {
+	return BuildPattern(cache, make(map[string]*Pattern),
+		true, algo.FuzzyMatchV2, true, CaseSmart, false, true,
+		false, true, []Range{}, Delimiter{}, revision{}, runes, nil, 0)
+}
+
+func TestBitmapCacheBenefit(t *testing.T) {
+	numChunks := 100
+	chunks := buildChunks(numChunks)
+	queries := []string{"s", "se", "ser", "serv", "servi"}
+
+	// 1. Run all queries with shared cache (simulates incremental typing)
+	cache := NewChunkCache()
+	for _, q := range queries {
+		pat := buildPatternWith(cache, []rune(q))
+		for _, chunk := range chunks {
+			pat.Match(chunk, slab)
+		}
+	}
+
+	// 2. GC and measure memory with cache populated
+	runtime.GC()
+	runtime.GC()
+	var memWith runtime.MemStats
+	runtime.ReadMemStats(&memWith)
+
+	// 3. Clear cache, GC, measure again
+	cache.Clear()
+	runtime.GC()
+	runtime.GC()
+	var memWithout runtime.MemStats
+	runtime.ReadMemStats(&memWithout)
+
+	cacheMem := int64(memWith.Alloc) - int64(memWithout.Alloc)
+	t.Logf("Chunks: %d, Queries: %d", numChunks, len(queries))
+	t.Logf("Cache memory: %d bytes (%.1f KB)", cacheMem, float64(cacheMem)/1024)
+	t.Logf("Per-chunk-per-query: %.0f bytes", float64(cacheMem)/float64(numChunks*len(queries)))
+
+	// 4. Verify correctness: cached vs uncached produce same results
+	cache2 := NewChunkCache()
+	for _, q := range queries {
+		pat := buildPatternWith(cache2, []rune(q))
+		for _, chunk := range chunks {
+			pat.Match(chunk, slab)
+		}
+	}
+	for _, q := range queries {
+		patCached := buildPatternWith(cache2, []rune(q))
+		patFresh := buildPatternWith(NewChunkCache(), []rune(q))
+		var countCached, countFresh int
+		for _, chunk := range chunks {
+			countCached += len(patCached.Match(chunk, slab))
+			countFresh += len(patFresh.Match(chunk, slab))
+		}
+		if countCached != countFresh {
+			t.Errorf("query=%q: cached=%d, fresh=%d", q, countCached, countFresh)
+		}
+		t.Logf("query=%q: matches=%d", q, countCached)
+	}
+}
+
+func BenchmarkWithCache(b *testing.B) {
+	numChunks := 100
+	chunks := buildChunks(numChunks)
+	queries := []string{"s", "se", "ser", "serv", "servi"}
+
+	b.Run("cached", func(b *testing.B) {
+		for range b.N {
+			cache := NewChunkCache()
+			for _, q := range queries {
+				pat := buildPatternWith(cache, []rune(q))
+				for _, chunk := range chunks {
+					pat.Match(chunk, slab)
+				}
+			}
+		}
+	})
+
+	b.Run("uncached", func(b *testing.B) {
+		for range b.N {
+			for _, q := range queries {
+				cache := NewChunkCache()
+				pat := buildPatternWith(cache, []rune(q))
+				for _, chunk := range chunks {
+					pat.Match(chunk, slab)
+				}
+			}
+		}
+	})
+}

src/protector/protector_openbsd.go

@@ -6,5 +6,5 @@ import "golang.org/x/sys/unix"
 
 // Protect calls OS specific protections like pledge on OpenBSD
 func Protect() {
-	unix.PledgePromises("stdio dpath wpath rpath tty proc exec inet tmppath")
+	unix.PledgePromises("stdio cpath dpath wpath rpath inet fattr unix tty proc exec")
 }

src/proxy.go

@@ -23,6 +23,32 @@ func escapeSingleQuote(str string) string {
 	return "'" + strings.ReplaceAll(str, "'", "'\\''") + "'"
 }
 
+func popupArgStr(args []string, opts *Options) (string, string) {
+	fzf, rest := args[0], args[1:]
+	args = []string{"--bind=ctrl-z:ignore"}
+	if !opts.Tmux.border && (opts.BorderShape == tui.BorderUndefined || opts.BorderShape == tui.BorderLine) {
+		if tui.DefaultBorderShape == tui.BorderRounded {
+			rest = append(rest, "--border=rounded")
+		} else {
+			rest = append(rest, "--border=sharp")
+		}
+	}
+	if opts.Tmux.border && opts.Margin == defaultMargin() {
+		args = append(args, "--margin=0,1")
+	}
+	argStr := escapeSingleQuote(fzf)
+	for _, arg := range append(args, rest...) {
+		argStr += " " + escapeSingleQuote(arg)
+	}
+	argStr += ` --no-popup --no-height`
+
+	dir, err := os.Getwd()
+	if err != nil {
+		dir = "."
+	}
+	return argStr, dir
+}
+
 func fifo(name string) (string, error) {
 	ns := time.Now().UnixNano()
 	output := filepath.Join(os.TempDir(), fmt.Sprintf("fzf-%s-%d", name, ns))

src/reader.go

@@ -274,6 +274,24 @@ func (r *Reader) readFiles(roots []string, opts walkerOpts, ignores []string) bo
 		ToSlash: fastwalk.DefaultToSlash(),
 		Sort:    fastwalk.SortFilesFirst,
 	}
+
+	// When following symlinks, precompute the absolute real paths of walker
+	// roots so we can skip symlinks that point to an ancestor. fastwalk's
+	// built-in loop detection (shouldTraverse) catches loops on the second
+	// pass, but a single pass through a symlink like z: -> / already
+	// traverses the entire root filesystem, causing severe resource
+	// exhaustion. Skipping ancestor symlinks prevents this entirely.
+	var absRoots []string
+	if opts.follow {
+		for _, root := range roots {
+			if real, err := filepath.EvalSymlinks(root); err == nil {
+				if abs, err := filepath.Abs(real); err == nil {
+					absRoots = append(absRoots, filepath.Clean(abs))
+				}
+			}
+		}
+	}
+
 	ignoresBase := []string{}
 	ignoresFull := []string{}
 	ignoresSuffix := []string{}
@@ -307,6 +325,24 @@ func (r *Reader) readFiles(roots []string, opts walkerOpts, ignores []string) bo
 			if isDirSymlink && !opts.follow {
 				return filepath.SkipDir
 			}
+			// Skip symlinks whose target is an ancestor of (or equal to)
+			// any walker root. Following such symlinks would traverse a
+			// superset of the tree we're already walking.
+			if isDirSymlink && len(absRoots) > 0 {
+				if target, err := filepath.EvalSymlinks(path); err == nil {
+					if abs, err := filepath.Abs(target); err == nil {
+						abs = filepath.Clean(abs)
+						if abs == string(os.PathSeparator) {
+							return filepath.SkipDir
+						}
+						for _, absRoot := range absRoots {
+							if absRoot == abs || strings.HasPrefix(absRoot, abs+string(os.PathSeparator)) {
+								return filepath.SkipDir
+							}
+						}
+					}
+				}
+			}
 			isDir := de.IsDir() || isDirSymlink
 			if isDir {
 				base := filepath.Base(path)

src/terminal.go

@@ -216,8 +216,9 @@ const (
 )
 
 type StatusItem struct {
-	Index int    `json:"index"`
-	Text  string `json:"text"`
+	Index     int    `json:"index"`
+	Text      string `json:"text"`
+	Positions []int  `json:"positions,omitempty"`
 }
 
 type Status struct {
@@ -314,6 +315,12 @@ type Terminal struct {
 	sort                 bool
 	toggleSort           bool
 	track                trackOption
+	idNth                []Range
+	trackKey             string
+	trackBlocked         bool
+	trackSync            bool
+	trackKeyCache        map[int32]bool
+	pendingSelections    map[string]selectedItem
 	targetIndex          int32
 	delimiter            Delimiter
 	expect               map[tui.Event]string
@@ -387,6 +394,7 @@ type Terminal struct {
 	hasLoadActions       bool
 	hasResizeActions     bool
 	triggerLoad          bool
+	pendingReqList       bool
 	filterSelection      bool
 	reading              bool
 	running              *util.AtomicBool
@@ -1043,6 +1051,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox, executor *util.Executor
 		sort:               opts.Sort > 0,
 		toggleSort:         opts.ToggleSort,
 		track:              opts.Track,
+		idNth:              opts.IdNth,
 		targetIndex:        minItem.Index(),
 		delimiter:          opts.Delimiter,
 		expect:             opts.Expect,
@@ -1850,7 +1859,14 @@ func (t *Terminal) UpdateList(result MatchResult) {
 	}
 	if t.revision != newRevision {
 		if !t.revision.compatible(newRevision) {
-			// Reloaded: clear selection
+			// Reloaded: capture selection keys for restoration, then clear (reload-sync only)
+			if t.trackSync && len(t.idNth) > 0 && t.multi > 0 && len(t.selected) > 0 {
+				t.pendingSelections = make(map[string]selectedItem, len(t.selected))
+				for _, sel := range t.selected {
+					key := t.trackKeyFor(sel.item, t.idNth)
+					t.pendingSelections[key] = sel
+				}
+			}
 			t.selected = make(map[int32]selectedItem)
 			t.clearNumLinesCache()
 		} else {
@@ -1891,9 +1907,36 @@ func (t *Terminal) UpdateList(result MatchResult) {
 	}
 	if t.triggerLoad {
 		t.triggerLoad = false
+		t.pendingReqList = true
 		t.eventChan <- tui.Load.AsEvent()
 	}
-	if prevIndex >= 0 {
+	// Search for the tracked item by nth key
+	// - reload (async): search eagerly, unblock as soon as match is found
+	// - reload-sync: wait until stream is complete before searching
+	trackWasBlocked := t.trackBlocked
+	if len(t.trackKey) > 0 && (!t.trackSync || !t.reading) {
+		found := false
+		for i := 0; i < t.merger.Length(); i++ {
+			item := t.merger.Get(i).item
+			idx := item.Index()
+			match, ok := t.trackKeyCache[idx]
+			if !ok {
+				match = t.trackKeyFor(item, t.idNth) == t.trackKey
+				t.trackKeyCache[idx] = match
+			}
+			if match {
+				t.cy = i
+				if t.track.Current() {
+					t.track.index = idx
+				}
+				found = true
+				break
+			}
+		}
+		if found || !t.reading {
+			t.unblockTrack()
+		}
+	} else if prevIndex >= 0 {
 		pos := t.cy - t.offset
 		count := t.merger.Length()
 		i := t.merger.FindIndex(prevIndex)
@@ -1909,12 +1952,25 @@ func (t *Terminal) UpdateList(result MatchResult) {
 			t.cy = count - min(count, t.maxItems()) + pos
 		}
 	}
+	// Restore selections by id-nth key after reload completes
+	if !t.reading && t.pendingSelections != nil {
+		for i := 0; i < t.merger.Length() && len(t.pendingSelections) > 0; i++ {
+			item := t.merger.Get(i).item
+			key := t.trackKeyFor(item, t.idNth)
+			if sel, found := t.pendingSelections[key]; found {
+				t.selected[item.Index()] = selectedItem{sel.at, item}
+				delete(t.pendingSelections, key)
+			}
+		}
+		t.pendingSelections = nil
+	}
 	needActivation := false
 	if !t.reading {
 		switch t.resultMerger.Length() {
 		case 0:
 			zero := tui.Zero.AsEvent()
 			if _, prs := t.keymap[zero]; prs {
+				t.pendingReqList = true
 				t.eventChan <- zero
 			}
 			// --sync, only 'focus' is bound, but no items to focus
@@ -1922,16 +1978,26 @@ func (t *Terminal) UpdateList(result MatchResult) {
 		case 1:
 			one := tui.One.AsEvent()
 			if _, prs := t.keymap[one]; prs {
+				t.pendingReqList = true
 				t.eventChan <- one
 			}
 		}
 	}
 	if t.hasResultActions {
+		t.pendingReqList = true
 		t.eventChan <- tui.Result.AsEvent()
 	}
+	updateList := !t.trackBlocked && !t.pendingReqList
+	updatePrompt := trackWasBlocked && !t.trackBlocked
 	t.mutex.Unlock()
+
 	t.reqBox.Set(reqInfo, nil)
-	t.reqBox.Set(reqList, nil)
+	if updateList {
+		t.reqBox.Set(reqList, nil)
+	}
+	if updatePrompt {
+		t.reqBox.Set(reqPrompt, nil)
+	}
 	if needActivation {
 		t.reqBox.Set(reqActivate, nil)
 	}
@@ -2177,7 +2243,7 @@ func (t *Terminal) resizeWindows(forcePreview bool, redrawBorder bool) {
 	width := screenWidth - marginInt[1] - marginInt[3]
 	height := screenHeight - marginInt[0] - marginInt[2]
 
-	t.prevLines = make([]itemLine, screenHeight)
+	t.prevLines = make([]itemLine, max(1, screenHeight))
 	if t.border != nil && redrawBorder {
 		t.border = nil
 	}
@@ -2880,6 +2946,8 @@ func (t *Terminal) printPrompt() {
 	color := tui.ColInput
 	if t.paused {
 		color = tui.ColDisabled
+	} else if t.trackBlocked {
+		color = color.WithAttr(tui.Dim)
 	}
 	w.CPrint(color, string(before))
 	w.CPrint(color, string(after))
@@ -2963,18 +3031,6 @@ func (t *Terminal) printInfoImpl() {
 	found := t.resultMerger.Length()
 	total := max(found, t.count)
 	output := fmt.Sprintf("%d/%d", found, total)
-	if t.toggleSort {
-		if t.sort {
-			output += " +S"
-		} else {
-			output += " -S"
-		}
-	}
-	if t.track.Global() {
-		output += " +T"
-	} else if t.track.Current() {
-		output += " +t"
-	}
 	if t.multi > 0 {
 		if t.multi == maxMulti {
 			output += fmt.Sprintf(" (%d)", len(t.selected))
@@ -2985,6 +3041,26 @@ func (t *Terminal) printInfoImpl() {
 	if t.progress > 0 && t.progress < 100 {
 		output += fmt.Sprintf(" (%d%%)", t.progress)
 	}
+	if t.toggleSort {
+		if t.sort {
+			output += " +S"
+		} else {
+			output += " -S"
+		}
+	}
+	if t.track.Global() {
+		if t.trackBlocked {
+			output += " +T*"
+		} else {
+			output += " +T"
+		}
+	} else if t.track.Current() {
+		if t.trackBlocked {
+			output += " +t*"
+		} else {
+			output += " +t"
+		}
+	}
 	if t.failed != nil && t.count == 0 {
 		output = fmt.Sprintf("[Command failed: %s]", *t.failed)
 	}
@@ -3905,6 +3981,7 @@ func (t *Terminal) printHighlighted(result Result, colBase tui.ColorPair, colMat
 			frozenRight = line[splitOffsetRight:]
 		}
 		displayWidthSum := 0
+		displayWidthLeft := 0
 		todo := [3]func(){}
 		for fidx, runes := range [][]rune{frozenLeft, frozenRight, middle} {
 			if len(runes) == 0 {
@@ -3930,7 +4007,11 @@ func (t *Terminal) printHighlighted(result Result, colBase tui.ColorPair, colMat
 				// For frozen parts, reserve space for the ellipsis in the middle part
 				adjustedMaxWidth -= ellipsisWidth
 			}
-			displayWidth = t.displayWidthWithLimit(runes, 0, adjustedMaxWidth)
+			var prefixWidth int
+			if fidx == 2 {
+				prefixWidth = displayWidthLeft
+			}
+			displayWidth = t.displayWidthWithLimit(runes, prefixWidth, adjustedMaxWidth)
 			if !t.wrap && displayWidth > adjustedMaxWidth {
 				maxe = util.Constrain(maxe+min(maxWidth/2-ellipsisWidth, t.hscrollOff), 0, len(runes))
 				transformOffsets := func(diff int32) {
@@ -3968,6 +4049,9 @@ func (t *Terminal) printHighlighted(result Result, colBase tui.ColorPair, colMat
 				displayWidth = t.displayWidthWithLimit(runes, 0, maxWidth)
 			}
 			displayWidthSum += displayWidth
+			if fidx == 0 {
+				displayWidthLeft = displayWidth
+			}
 
 			if maxWidth > 0 {
 				color := colBase
@@ -3975,7 +4059,7 @@ func (t *Terminal) printHighlighted(result Result, colBase tui.ColorPair, colMat
 					color = color.WithFg(t.theme.Nomatch)
 				}
 				todo[fidx] = func() {
-					t.printColoredString(t.window, runes, offs, color)
+					t.printColoredString(t.window, runes, offs, color, prefixWidth)
 				}
 			} else {
 				break
@@ -4002,10 +4086,13 @@ func (t *Terminal) printHighlighted(result Result, colBase tui.ColorPair, colMat
 	return finalLineNum
 }
 
-func (t *Terminal) printColoredString(window tui.Window, text []rune, offsets []colorOffset, colBase tui.ColorPair) {
+func (t *Terminal) printColoredString(window tui.Window, text []rune, offsets []colorOffset, colBase tui.ColorPair, initialPrefixWidth ...int) {
 	var index int32
 	var substr string
 	var prefixWidth int
+	if len(initialPrefixWidth) > 0 {
+		prefixWidth = initialPrefixWidth[0]
+	}
 	maxOffset := int32(len(text))
 	var url *url
 	for _, offset := range offsets {
@@ -4212,7 +4299,7 @@ func (t *Terminal) followOffset() int {
 	for i := len(body) - 1; i >= 0; i-- {
 		h := t.previewLineHeight(body[i], maxWidth)
 		if visualLines+h > height {
-			return headerLines + i + 1
+			return min(len(lines)-1, headerLines+i+1)
 		}
 		visualLines += h
 	}
@@ -4510,7 +4597,7 @@ Loop:
 				}
 			}
 
-			t.previewer.scrollable = t.previewer.scrollable || t.pwindow.Y() == height-1 && t.pwindow.X() == t.pwindow.Width()
+			t.previewer.scrollable = t.previewer.scrollable || t.pwindow.Y() == height-1 && t.pwindow.X() == t.pwindow.Width() || t.previewed.filled
 			if fillRet == tui.FillNextLine {
 				continue
 			} else if fillRet == tui.FillSuspend {
@@ -4533,7 +4620,7 @@ Loop:
 		}
 		lineNo++
 	}
-	t.previewer.scrollable = t.previewer.scrollable || index < len(lines)-1
+	t.previewer.scrollable = t.previewer.scrollable || t.previewed.filled || index < len(lines)-1
 	t.previewed.image = image
 	t.previewed.wireframe = wireframe
 }
@@ -4543,7 +4630,7 @@ func (t *Terminal) renderPreviewScrollbar(yoff int, barLength int, barStart int)
 	w := t.pborder.Width()
 	xw := [2]int{t.pwindow.Left(), t.pwindow.Width()}
 	redraw := false
-	if len(t.previewer.bar) != height || t.previewer.xw != xw {
+	if len(t.previewer.bar) != height || t.previewer.xw != xw || t.previewed.version != t.previewer.version {
 		redraw = true
 		t.previewer.bar = make([]bool, height)
 		t.previewer.xw = xw
@@ -5355,6 +5442,22 @@ func (t *Terminal) currentIndex() int32 {
 	return minItem.Index()
 }
 
+func (t *Terminal) trackKeyFor(item *Item, nth []Range) string {
+	tokens := Tokenize(item.AsString(t.ansi), t.delimiter)
+	return StripLastDelimiter(JoinTokens(Transform(tokens, nth)), t.delimiter)
+}
+
+func (t *Terminal) unblockTrack() {
+	if t.trackBlocked {
+		t.trackBlocked = false
+		t.trackKey = ""
+		t.trackKeyCache = nil
+		if !t.inputless {
+			t.tui.ShowCursor()
+		}
+	}
+}
+
 func (t *Terminal) addClickHeaderWord(env []string) []string {
 	/*
 	 * echo $'HL1\nHL2' | fzf --header-lines 3 --header $'H1\nH2' --header-lines-border --bind 'click-header:preview:env | grep FZF_CLICK'
@@ -6176,6 +6279,14 @@ func (t *Terminal) Loop() error {
 					callback(a.a)
 				}
 			}
+			// When track-blocked, only allow abort/cancel and track-disabling actions
+			if t.trackBlocked && a.t != actToggleTrack && a.t != actToggleTrackCurrent && a.t != actUntrackCurrent {
+				if a.t == actAbort || a.t == actCancel {
+					t.unblockTrack()
+					req(reqPrompt, reqInfo)
+				}
+				return true
+			}
 		Action:
 			switch a.t {
 			case actIgnore, actStart, actClick:
@@ -6947,14 +7058,16 @@ func (t *Terminal) Loop() error {
 				case trackDisabled:
 					t.track = trackEnabled
 				}
-				req(reqInfo)
+				t.unblockTrack()
+				req(reqPrompt, reqInfo)
 			case actToggleTrackCurrent:
 				if t.track.Current() {
 					t.track = trackDisabled
 				} else if t.track.Disabled() {
 					t.track = trackCurrent(t.currentIndex())
 				}
-				req(reqInfo)
+				t.unblockTrack()
+				req(reqPrompt, reqInfo)
 			case actShowHeader:
 				t.headerVisible = true
 				req(reqList, reqInfo, reqPrompt, reqHeader)
@@ -7017,7 +7130,8 @@ func (t *Terminal) Loop() error {
 				if t.track.Current() {
 					t.track = trackDisabled
 				}
-				req(reqInfo)
+				t.unblockTrack()
+				req(reqPrompt, reqInfo)
 			case actSearch:
 				override := []rune(a.a)
 				t.inputOverride = &override
@@ -7070,10 +7184,12 @@ func (t *Terminal) Loop() error {
 				}
 				if !me.Down {
 					barDragging = false
+					pmx, pmy = -1, -1
+				}
+				if !me.Down || !t.hasPreviewWindow() {
 					pbarDragging = false
 					pborderDragging = -1
 					previewDraggingPos = -1
-					pmx, pmy = -1, -1
 				}
 
 				// Scrolling
@@ -7101,7 +7217,7 @@ func (t *Terminal) Loop() error {
 				}
 
 				// Preview dragging
-				if me.Down && (previewDraggingPos >= 0 || click && t.hasPreviewWindow() && t.pwindow.Enclose(my, mx)) {
+				if t.hasPreviewWindow() && me.Down && (previewDraggingPos >= 0 || click && t.pwindow.Enclose(my, mx)) {
 					if previewDraggingPos > 0 {
 						scrollPreviewBy(previewDraggingPos - my)
 					}
@@ -7111,7 +7227,7 @@ func (t *Terminal) Loop() error {
 
 				// Preview scrollbar dragging
 				headerLines := t.activePreviewOpts.headerLines
-				pbarDragging = me.Down && (pbarDragging || click && t.hasPreviewWindow() && my >= t.pwindow.Top()+headerLines && my < t.pwindow.Top()+t.pwindow.Height() && mx == t.pwindow.Left()+t.pwindow.Width())
+				pbarDragging = t.hasPreviewWindow() && me.Down && (pbarDragging || click && my >= t.pwindow.Top()+headerLines && my < t.pwindow.Top()+t.pwindow.Height() && mx == t.pwindow.Left()+t.pwindow.Width())
 				if pbarDragging {
 					effectiveHeight := t.pwindow.Height() - headerLines
 					numLines := len(t.previewer.lines) - headerLines
@@ -7128,7 +7244,7 @@ func (t *Terminal) Loop() error {
 				}
 
 				// Preview border dragging (resizing)
-				if pborderDragging < 0 && click && t.hasPreviewWindow() {
+				if t.hasPreviewWindow() && pborderDragging < 0 && click {
 					switch t.activePreviewOpts.position {
 					case posUp:
 						if t.pborder.Enclose(my, mx) && my == t.pborder.Top()+t.pborder.Height()-1 {
@@ -7157,7 +7273,7 @@ func (t *Terminal) Loop() error {
 					}
 				}
 
-				if pborderDragging >= 0 && t.hasPreviewWindow() {
+				if t.hasPreviewWindow() && pborderDragging >= 0 {
 					var newSize int
 					var prevSize int
 					switch t.activePreviewOpts.position {
@@ -7368,6 +7484,22 @@ func (t *Terminal) Loop() error {
 					newCommand = &commandSpec{command, tempFiles}
 					reloadSync = a.t == actReloadSync
 					t.reading = true
+
+					if len(t.idNth) > 0 {
+						t.trackSync = reloadSync
+					}
+					// Capture tracking key before reload
+					if !t.track.Disabled() && len(t.idNth) > 0 {
+						if item := t.currentItem(); item != nil {
+							t.trackKey = t.trackKeyFor(item, t.idNth)
+							t.trackKeyCache = make(map[int32]bool)
+							t.trackBlocked = true
+							if !t.inputless {
+								t.tui.HideCursor()
+							}
+							req(reqPrompt, reqInfo)
+						}
+					}
 				}
 			case actUnbind:
 				if keys, _, err := parseKeyChords(a.a, "PANIC"); err == nil {
@@ -7571,6 +7703,11 @@ func (t *Terminal) Loop() error {
 		// Dispatch queued background requests
 		t.dispatchAsync()
 
+		if t.pendingReqList {
+			t.pendingReqList = false
+			req(reqList)
+		}
+
 		t.mutex.Unlock() // Must be unlocked before touching reqBox
 
 		if reload {
@@ -7735,10 +7872,18 @@ func (t *Terminal) dumpItem(i *Item) StatusItem {
 	if i == nil {
 		return StatusItem{}
 	}
-	return StatusItem{
+	item := StatusItem{
 		Index: int(i.Index()),
 		Text:  i.AsString(t.ansi),
 	}
+	if t.resultMerger.pattern != nil {
+		_, _, pos := t.resultMerger.pattern.MatchItem(i, true, t.slab)
+		if pos != nil {
+			sort.Ints(*pos)
+			item.Positions = *pos
+		}
+	}
+	return item
 }
 
 func (t *Terminal) tryLock(timeout time.Duration) bool {

src/tmux.go

@@ -1,39 +1,11 @@
 package fzf
 
 import (
-	"os"
 	"os/exec"
-
-	"github.com/junegunn/fzf/src/tui"
 )
 
 func runTmux(args []string, opts *Options) (int, error) {
-	// Prepare arguments
-	fzf, rest := args[0], args[1:]
-	args = []string{"--bind=ctrl-z:ignore"}
-	if !opts.Tmux.border && (opts.BorderShape == tui.BorderUndefined || opts.BorderShape == tui.BorderLine) {
-		// We append --border option at the end, because `--style=full:STYLE`
-		// may have changed the default border style.
-		if tui.DefaultBorderShape == tui.BorderRounded {
-			rest = append(rest, "--border=rounded")
-		} else {
-			rest = append(rest, "--border=sharp")
-		}
-	}
-	if opts.Tmux.border && opts.Margin == defaultMargin() {
-		args = append(args, "--margin=0,1")
-	}
-	argStr := escapeSingleQuote(fzf)
-	for _, arg := range append(args, rest...) {
-		argStr += " " + escapeSingleQuote(arg)
-	}
-	argStr += ` --no-tmux --no-height`
-
-	// Get current directory
-	dir, err := os.Getwd()
-	if err != nil {
-		dir = "."
-	}
+	argStr, dir := popupArgStr(args, opts)
 
 	// Set tmux options for popup placement
 	// C        Both    The centre of the terminal

src/tokenizer.go

@@ -161,7 +161,7 @@ func awkTokenizer(input string) ([]string, int) {
 	end := 0
 	for idx := 0; idx < len(input); idx++ {
 		r := input[idx]
-		white := r == 9 || r == 32
+		white := r == 9 || r == 32 || r == 10
 		switch state {
 		case awkNil:
 			if white {
@@ -218,11 +218,12 @@ func Tokenize(text string, delimiter Delimiter) []Token {
 	return withPrefixLengths(tokens, 0)
 }
 
-// StripLastDelimiter removes the trailing delimiter and whitespaces
+// StripLastDelimiter removes the trailing delimiter
 func StripLastDelimiter(str string, delimiter Delimiter) string {
 	if delimiter.str != nil {
-		str = strings.TrimSuffix(str, *delimiter.str)
-	} else if delimiter.regex != nil {
+		return strings.TrimSuffix(str, *delimiter.str)
+	}
+	if delimiter.regex != nil {
 		locs := delimiter.regex.FindAllStringIndex(str, -1)
 		if len(locs) > 0 {
 			lastLoc := locs[len(locs)-1]
@@ -230,6 +231,7 @@ func StripLastDelimiter(str string, delimiter Delimiter) string {
 				str = str[:lastLoc[0]]
 			}
 		}
+		return str
 	}
 	return strings.TrimRightFunc(str, unicode.IsSpace)
 }

src/tokenizer_test.go

@@ -56,9 +56,9 @@ func TestParseRange(t *testing.T) {
 
 func TestTokenize(t *testing.T) {
 	// AWK-style
-	input := "  abc:  def:  ghi  "
+	input := "  abc: \n\t def:  ghi  "
 	tokens := Tokenize(input, Delimiter{})
-	if tokens[0].text.ToString() != "abc:  " || tokens[0].prefixLength != 2 {
+	if tokens[0].text.ToString() != "abc: \n\t " || tokens[0].prefixLength != 2 {
 		t.Errorf("%s", tokens)
 	}
 
@@ -71,9 +71,9 @@ func TestTokenize(t *testing.T) {
 	// With delimiter regex
 	tokens = Tokenize(input, delimiterRegexp("\\s+"))
 	if tokens[0].text.ToString() != "  " || tokens[0].prefixLength != 0 ||
-		tokens[1].text.ToString() != "abc:  " || tokens[1].prefixLength != 2 ||
-		tokens[2].text.ToString() != "def:  " || tokens[2].prefixLength != 8 ||
-		tokens[3].text.ToString() != "ghi  " || tokens[3].prefixLength != 14 {
+		tokens[1].text.ToString() != "abc: \n\t " || tokens[1].prefixLength != 2 ||
+		tokens[2].text.ToString() != "def:  " || tokens[2].prefixLength != 10 ||
+		tokens[3].text.ToString() != "ghi  " || tokens[3].prefixLength != 16 {
 		t.Errorf("%s", tokens)
 	}
 }

src/util/util_unix.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"syscall"
 
+	"github.com/junegunn/go-shellwords"
 	"golang.org/x/sys/unix"
 )
 
@@ -20,8 +21,8 @@ type Executor struct {
 
 func NewExecutor(withShell string) *Executor {
 	shell := os.Getenv("SHELL")
-	args := strings.Fields(withShell)
-	if len(args) > 0 {
+	args, err := shellwords.Parse(withShell)
+	if err == nil && len(args) > 0 {
 		shell = args[0]
 		args = args[1:]
 	} else {

src/zellij.go

@@ -0,0 +1,41 @@
+package fzf
+
+import (
+	"os/exec"
+)
+
+func runZellij(args []string, opts *Options) (int, error) {
+	argStr, dir := popupArgStr(args, opts)
+
+	zellijArgs := []string{
+		"run", "--floating", "--close-on-exit", "--block-until-exit",
+		"--cwd", dir,
+	}
+	if !opts.Tmux.border {
+		zellijArgs = append(zellijArgs, "--borderless", "true")
+	}
+	switch opts.Tmux.position {
+	case posUp:
+		zellijArgs = append(zellijArgs, "-y", "0")
+	case posDown:
+		zellijArgs = append(zellijArgs, "-y", "9999")
+	case posLeft:
+		zellijArgs = append(zellijArgs, "-x", "0")
+	case posRight:
+		zellijArgs = append(zellijArgs, "-x", "9999")
+	case posCenter:
+		// Zellij centers floating panes by default
+	}
+	zellijArgs = append(zellijArgs, "--width", opts.Tmux.width.String())
+	zellijArgs = append(zellijArgs, "--height", opts.Tmux.height.String())
+	zellijArgs = append(zellijArgs, "--")
+
+	return runProxy(argStr, func(temp string, needBash bool) (*exec.Cmd, error) {
+		sh, err := sh(needBash)
+		if err != nil {
+			return nil, err
+		}
+		zellijArgs = append(zellijArgs, sh, temp)
+		return exec.Command("zellij", zellijArgs...), nil
+	}, opts, true)
+}

test/test_core.rb

@@ -404,11 +404,11 @@ class TestCore < TestInteractive
       tmux.send_keys "seq 1 111 | #{fzf("-m +s --tac #{opt} -q11")}", :Enter
       tmux.until { |lines| assert_equal '> 111', lines[-3] }
       tmux.send_keys :Tab
-      tmux.until { |lines| assert_equal '  4/111 -S (1)', lines[-2] }
+      tmux.until { |lines| assert_equal '  4/111 (1) -S', lines[-2] }
       tmux.send_keys 'C-R'
       tmux.until { |lines| assert_equal '> 11', lines[-3] }
       tmux.send_keys :Tab
-      tmux.until { |lines| assert_equal '  4/111 +S (2)', lines[-2] }
+      tmux.until { |lines| assert_equal '  4/111 (2) +S', lines[-2] }
       tmux.send_keys :Enter
       assert_equal %w[111 11], fzf_output_lines
     end
@@ -1190,6 +1190,16 @@ class TestCore < TestInteractive
     tmux.until { |lines| assert lines.any_include?('9999␊10000') }
   end
 
+  def test_freeze_left_tabstop
+    writelines(%W[1\t2\t3])
+    # With --freeze-left 1 and --tabstop=2:
+    # Frozen left: "1" (width 1)
+    # Middle starts with "\t" at prefix width 1, tabstop 2 → 1 space
+    # Then "2" at column 2, next "\t" at column 3 → 1 space, then "3"
+    tmux.send_keys %(cat #{tempname} | #{FZF} --tabstop=2 --freeze-left 1), :Enter
+    tmux.until { |lines| assert_equal '> 1 2 3', lines[-3] }
+  end
+
   def test_freeze_left_keep_right
     tmux.send_keys %(seq 10000 | #{FZF} --read0 --delimiter "\n" --freeze-left 3 --keep-right --ellipsis XX --no-multi-line --bind space:toggle-multi-line), :Enter
     tmux.until { |lines| assert_match(/^> 1␊2␊3XX.*10000␊$/, lines[-3]) }
@@ -1649,6 +1659,236 @@ class TestCore < TestInteractive
     end
   end
 
+  def test_track_nth_reload_whole_line
+    # --track --id-nth .. should track by entire line across reloads
+    tmux.send_keys "seq 1000 | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload:seq 1000 | sort -R'", :Enter
+    tmux.until { |lines| assert_equal 1000, lines.match_count }
+
+    # Move to item 555
+    tmux.send_keys '555'
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> 555'
+    end
+    tmux.send_keys :BSpace, :BSpace, :BSpace
+
+    # Reload with shuffled order — cursor should track "555"
+    tmux.send_keys 'C-r'
+    tmux.until do |lines|
+      assert_equal 1000, lines.match_count
+      assert_includes lines, '> 555'
+      assert_includes lines[-2], '+T'
+      refute_includes lines[-2], '+T*'
+    end
+  end
+
+  def test_track_nth_reload_field
+    # --track --id-nth 1 should track by first field across reloads
+    tmux.send_keys "printf '1 apple\\n2 banana\\n3 cherry\\n' | #{FZF} --track --id-nth 1 --bind 'ctrl-r:reload:printf \"1 apricot\\n2 blueberry\\n3 cranberry\\n\"'", :Enter
+    tmux.until do |lines|
+      assert_equal 3, lines.match_count
+      assert_includes lines, '> 1 apple'
+    end
+
+    # Move up to "2 banana"
+    tmux.send_keys :Up
+    tmux.until { |lines| assert_includes lines, '> 2 banana' }
+
+    # Reload — the second field changes, but first field "2" stays
+    tmux.send_keys 'C-r'
+    tmux.until do |lines|
+      assert_equal 3, lines.match_count
+      assert_includes lines, '> 2 blueberry'
+    end
+  end
+
+  def test_track_nth_reload_no_match
+    # When tracked item is not found after reload, cursor stays at current position
+    tmux.send_keys "printf 'alpha\\nbeta\\ngamma\\n' | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload:printf \"delta\\nepsilon\\nzeta\\n\"'", :Enter
+    tmux.until { |lines| assert_equal 3, lines.match_count }
+    tmux.send_keys :Up
+    tmux.until { |lines| assert_includes lines, '> beta' }
+
+    # Reload with completely different items — no match for "beta"
+    # Cursor stays at the same position (second item)
+    tmux.send_keys 'C-r'
+    tmux.until do |lines|
+      assert_equal 3, lines.match_count
+      assert_includes lines, '> epsilon'
+      refute_includes lines[-2], '+T*'
+    end
+  end
+
+  def test_track_nth_blocked_indicator
+    # +T* should appear during reload and disappear when match is found
+    tmux.send_keys "seq 100 | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload:sleep 1; seq 100 | sort -R'", :Enter
+    tmux.until do |lines|
+      assert_equal 100, lines.match_count
+      assert_includes lines[-2], '+T'
+    end
+
+    # Trigger slow reload — should show +T* while blocked
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_includes lines[-2], '+T*' }
+
+    # After reload completes, +T* should clear back to +T
+    tmux.until do |lines|
+      assert_equal 100, lines.match_count
+      assert_includes lines[-2], '+T'
+      refute_includes lines[-2], '+T*'
+    end
+  end
+
+  def test_track_nth_abort_unblocks
+    # Escape during track-blocked state should unblock, not quit
+    tmux.send_keys "seq 100 | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload:sleep 3; seq 100'", :Enter
+    tmux.until do |lines|
+      assert_equal 100, lines.match_count
+      assert_includes lines[-2], '+T'
+    end
+
+    # Trigger slow reload
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_includes lines[-2], '+T*' }
+
+    # Escape should unblock, not quit fzf
+    tmux.send_keys :Escape
+    tmux.until do |lines|
+      assert_includes lines[-2], '+T'
+      refute_includes lines[-2], '+T*'
+    end
+  end
+
+  def test_track_nth_reload_async_unblocks_early
+    # With async reload, +T* should clear as soon as the match streams in,
+    # even while loading is still in progress.
+    # sleep 1 first so +T* is observable, then the match arrives, then more items after a delay.
+    tmux.send_keys "seq 5 | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload:sleep 1; echo 1; sleep 2; seq 2 10'", :Enter
+    tmux.until do |lines|
+      assert_equal 5, lines.match_count
+      assert_includes lines, '> 1'
+    end
+
+    # Trigger reload — blocked during initial sleep
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_includes lines[-2], '+T*' }
+    # Match "1" arrives, unblocks before the remaining items load
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> 1'
+      assert_includes lines[-2], '+T'
+      refute_includes lines[-2], '+T*'
+    end
+  end
+
+  def test_track_nth_reload_sync_blocks_until_complete
+    # With reload-sync, +T* should stay until the entire stream is complete,
+    # even though the match arrives early in the stream.
+    tmux.send_keys "seq 5 | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload-sync:sleep 1; echo 1; sleep 2; seq 2 10'", :Enter
+    tmux.until do |lines|
+      assert_equal 5, lines.match_count
+      assert_includes lines, '> 1'
+    end
+
+    # Trigger reload-sync — every observable state must be either:
+    # 1. +T* (still blocked), or
+    # 2. final state (count=10, +T without *)
+    # Any other combination (e.g. unblocked while count < 10) is a bug.
+    tmux.send_keys 'C-r'
+    tmux.until do |lines|
+      info = lines[-2]
+      blocked = info&.include?('+T*')
+      unless blocked
+        raise "Unblocked before stream complete (count: #{lines.match_count})" if lines.match_count != 10
+
+        assert_includes info, '+T'
+        assert_includes lines, '> 1'
+      end
+      !blocked
+    end
+  end
+
+  def test_track_nth_toggle_track_unblocks
+    # toggle-track during track-blocked state should unblock and disable tracking
+    tmux.send_keys "seq 100 | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload:sleep 5; seq 100' --bind 'ctrl-t:toggle-track'", :Enter
+    tmux.until do |lines|
+      assert_equal 100, lines.match_count
+      assert_includes lines[-2], '+T'
+    end
+
+    # Trigger slow reload
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_includes lines[-2], '+T*' }
+
+    # toggle-track should unblock and disable tracking before reload completes
+    tmux.send_keys 'C-t'
+    tmux.until(timeout: 3) do |lines|
+      refute_includes lines[-2], '+T'
+    end
+  end
+
+  def test_track_nth_reload_async_no_match
+    # With async reload, when tracked item is not found, cursor stays at
+    # current position after stream completes
+    tmux.send_keys "printf 'alpha\\nbeta\\ngamma\\n' | #{FZF} --track --id-nth .. --bind 'ctrl-r:reload:sleep 1; printf \"delta\\nepsilon\\nzeta\\n\"'", :Enter
+    tmux.until { |lines| assert_equal 3, lines.match_count }
+    tmux.send_keys :Up
+    tmux.until { |lines| assert_includes lines, '> beta' }
+
+    # Reload with completely different items — no match for "beta"
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_includes lines[-2], '+T*' }
+    # After stream completes, unblocks with cursor at same position (second item)
+    tmux.until do |lines|
+      assert_equal 3, lines.match_count
+      assert_includes lines, '> epsilon'
+      refute_includes lines[-2], '+T*'
+    end
+  end
+
+  def test_track_action_with_id_nth
+    # track-current with --id-nth should track by specified field
+    tmux.send_keys "printf '1 apple\\n2 banana\\n3 cherry\\n' | #{FZF} --id-nth 1 --bind 'ctrl-t:track-current,ctrl-r:reload:printf \"1 apricot\\n2 blueberry\\n3 cranberry\\n\"'", :Enter
+    tmux.until { |lines| assert_equal 3, lines.match_count }
+
+    # Move to "2 banana" and activate tracking
+    tmux.send_keys :Up
+    tmux.until { |lines| assert_includes lines, '> 2 banana' }
+    tmux.send_keys 'C-t'
+    tmux.until { |lines| assert_includes lines[-2], '+t' }
+
+    # Reload — should track by field "2"
+    tmux.send_keys 'C-r'
+    tmux.until do |lines|
+      assert_equal 3, lines.match_count
+      assert_includes lines, '> 2 blueberry'
+    end
+  end
+
+  def test_id_nth_preserve_multi_selection
+    # --id-nth with --multi should preserve selections across reload-sync
+    File.write(tempname, "1 apricot\n2 blueberry\n3 cranberry\n")
+    tmux.send_keys "printf '1 apple\\n2 banana\\n3 cherry\\n' | #{fzf("--multi --id-nth 1 --bind 'ctrl-r:reload-sync:cat #{tempname}'")}", :Enter
+    tmux.until { |lines| assert_equal 3, lines.match_count }
+
+    # Select first item (1 apple) and third item (3 cherry)
+    tmux.send_keys :Tab
+    tmux.send_keys :Up, :Up, :Tab
+    tmux.until { |lines| assert_includes lines[-2], '(2)' }
+
+    # Reload — selections should be preserved by id-nth key
+    tmux.send_keys 'C-r'
+    tmux.until do |lines|
+      assert_equal 3, lines.match_count
+      assert_includes lines[-2], '(2)'
+      assert(lines.any? { |l| l.include?('apricot') })
+    end
+
+    # Accept and verify the correct items were preserved
+    tmux.send_keys :Enter
+    assert_equal ['1 apricot', '3 cranberry'], fzf_output_lines
+  end
+
   def test_one_and_zero
     tmux.send_keys "seq 10 | #{FZF} --bind 'zero:preview(echo no match),one:preview(echo {} is the only match)'", :Enter
     tmux.send_keys '1'
@@ -2085,13 +2325,13 @@ class TestCore < TestInteractive
     tmux.send_keys %(echo "foo  ,bar,baz" | #{FZF} -d, --accept-nth 2,2,1,3,1 --sync --bind start:accept > #{tempname}), :Enter
     wait do
       assert_path_exists tempname
-      # Last delimiter and the whitespaces are removed
-      assert_equal ['bar,bar,foo  ,bazfoo'], File.readlines(tempname, chomp: true)
+      # Last delimiter is removed
+      assert_equal ['bar,bar,foo  ,bazfoo  '], File.readlines(tempname, chomp: true)
     end
   end
 
   def test_accept_nth_regex_delimiter
-    tmux.send_keys %(echo "foo  :,:bar,baz" | #{FZF} --delimiter='[:,]+' --accept-nth 2,2,1,3,1 --sync --bind start:accept > #{tempname}), :Enter
+    tmux.send_keys %(echo "foo  :,:bar,baz" | #{FZF} --delimiter=' *[:,]+ *' --accept-nth 2,2,1,3,1 --sync --bind start:accept > #{tempname}), :Enter
     wait do
       assert_path_exists tempname
       # Last delimiter and the whitespaces are removed
@@ -2109,7 +2349,7 @@ class TestCore < TestInteractive
   end
 
   def test_accept_nth_template
-    tmux.send_keys %(echo "foo  ,bar,baz" | #{FZF} -d, --accept-nth '[{n}] 1st: {1}, 3rd: {3}, 2nd: {2}' --sync --bind start:accept > #{tempname}), :Enter
+    tmux.send_keys %(echo "foo  ,bar,baz" | #{FZF} -d " *, *" --accept-nth '[{n}] 1st: {1}, 3rd: {3}, 2nd: {2}' --sync --bind start:accept > #{tempname}), :Enter
     wait do
       assert_path_exists tempname
       # Last delimiter and the whitespaces are removed

test/test_preview.rb

@@ -393,6 +393,20 @@ class TestPreview < TestInteractive
     end
   end
 
+  def test_preview_follow_wrap_long_line
+    tmux.send_keys %(seq 1 | #{FZF} --preview "seq 2; yes yes | head -10000 | tr '\n' ' '" --preview-window follow,wrap --bind up:preview-up,down:preview-down), :Enter
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert lines.any_include?('3/3 │')
+    end
+    tmux.send_keys :Up
+    tmux.until { |lines| assert lines.any_include?('2/3 │') }
+    tmux.send_keys :Up
+    tmux.until { |lines| assert lines.any_include?('1/3 │') }
+    tmux.send_keys :Down
+    tmux.until { |lines| assert lines.any_include?('2/3 │') }
+  end
+
   def test_close
     tmux.send_keys "seq 100 | #{FZF} --preview 'echo foo' --bind ctrl-c:close", :Enter
     tmux.until { |lines| assert_equal 100, lines.match_count }
@@ -593,7 +607,7 @@ class TestPreview < TestInteractive
   end
 
   def test_preview_wrap_sign_between_ansi_fragments_overflow
-    tmux.send_keys %(seq 1 | #{FZF} --preview 'echo -e "\\x1b[33m1234567890 \\x1b[mhello"; echo -e "\\x1b[33m1234567890 \\x1b[mhello"' --preview-window 2,wrap-word), :Enter
+    tmux.send_keys %(seq 1 | #{FZF} --preview 'echo -e "\\x1b[33m123 \\x1b[mhi"; echo -e "\\x1b[33m123 \\x1b[mhi"' --preview-window 2,wrap-word,noinfo), :Enter
     tmux.until do |lines|
       assert_equal 1, lines.match_count
       assert_equal(2, lines.count { |line| line.include?('│ 12 │') })
@@ -602,11 +616,27 @@ class TestPreview < TestInteractive
   end
 
   def test_preview_wrap_sign_between_ansi_fragments_overflow2
-    tmux.send_keys %(seq 1 | #{FZF} --preview 'echo -e "\\x1b[33m1234567890 \\x1b[mhello"; echo -e "\\x1b[33m1234567890 \\x1b[mhello"' --preview-window 1,wrap-word), :Enter
+    tmux.send_keys %(seq 1 | #{FZF} --preview 'echo -e "\\x1b[33m123 \\x1b[mhi"; echo -e "\\x1b[33m123 \\x1b[mhi"' --preview-window 1,wrap-word,noinfo), :Enter
     tmux.until do |lines|
       assert_equal 1, lines.match_count
       assert_equal(2, lines.count { |line| line.include?('│ 1 │') })
       assert_equal(0, lines.count { |line| line.include?('│ h') })
     end
   end
+
+  def test_preview_toggle_should_redraw_scrollbar
+    tmux.send_keys %(seq 1 | #{FZF} --no-border --scrollbar --preview 'seq $((FZF_PREVIEW_LINES + 1))' --preview-border line --bind tab:toggle-preview --header foo --header-border --footer bar --footer-border), :Enter
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_operator lines.count { |line| line.end_with?('│') }, :>, 2
+    end
+    tmux.send_keys :Tab
+    tmux.until do |lines|
+      assert_equal(2, lines.count { |line| line.end_with?('│') })
+    end
+    tmux.send_keys :Tab
+    tmux.until do |lines|
+      assert_operator lines.count { |line| line.end_with?('│') }, :>, 2
+    end
+  end
 end

test/test_server.rb

@@ -16,6 +16,31 @@ class TestServer < TestInteractive
       assert_empty state[:query]
       assert_equal({ index: 0, text: '1' }, state[:current])
 
+      # No positions when query is empty
+      state[:matches].each do |m|
+        assert_nil m[:positions]
+      end
+      assert_nil state[:current][:positions] if state[:current]
+
+      # Positions with a single-character query
+      Net::HTTP.post(fn.call, 'change-query(1)')
+      tmux.until { |lines| assert_equal 2, lines.match_count }
+      state = JSON.parse(Net::HTTP.get(fn.call), symbolize_names: true)
+      assert_equal [0], state[:current][:positions]
+      state[:matches].each do |m|
+        assert_includes m[:text], '1'
+        assert_equal [m[:text].index('1')], m[:positions]
+      end
+
+      # Positions with a multi-character query; verify sorted ascending
+      Net::HTTP.post(fn.call, 'change-query(10)')
+      tmux.until { |lines| assert_equal 1, lines.match_count }
+      state = JSON.parse(Net::HTTP.get(fn.call), symbolize_names: true)
+      assert_equal '10', state[:current][:text]
+      assert_equal [0, 1], state[:current][:positions]
+      assert_equal state[:current][:positions], state[:current][:positions].sort
+
+      # No match — no current item
       Net::HTTP.post(fn.call, 'change-query(yo)+reload(seq 100)+change-prompt:hundred> ')
       tmux.until { |lines| assert_equal 100, lines.item_count }
       tmux.until { |lines| assert_equal 'hundred> yo', lines[-1] }

test/test_shell_integration.rb

@@ -832,6 +832,55 @@ class TestBash < TestBase
     tmux.prepare
   end
 
+  def test_ctrl_r_delete
+    tmux.prepare
+    tmux.send_keys 'echo to-keep', :Enter
+    tmux.prepare
+    tmux.send_keys 'echo to-delete-1', :Enter
+    tmux.prepare
+    tmux.send_keys 'echo to-delete-2', :Enter
+    tmux.prepare
+    tmux.send_keys 'echo to-delete-3', :Enter
+    tmux.prepare
+    tmux.send_keys 'echo another-keeper', :Enter
+    tmux.prepare
+
+    # Open Ctrl-R and delete one entry
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
+    tmux.send_keys 'to-delete'
+    tmux.until { |lines| assert_equal 3, lines.match_count }
+    tmux.send_keys 'S-Delete'
+    tmux.until { |lines| assert_equal 2, lines.match_count }
+
+    # Multi-select remaining two and delete them at once
+    tmux.send_keys :BTab, :BTab
+    tmux.until { |lines| assert_includes lines[-2], '(2)' }
+    tmux.send_keys 'S-Delete'
+    tmux.until { |lines| assert_equal 0, lines.match_count }
+
+    # Exit without selecting
+    tmux.send_keys :Escape
+    tmux.prepare
+
+    # Verify deleted entries are gone from history
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
+    tmux.send_keys 'to-delete'
+    tmux.until { |lines| assert_equal 0, lines.match_count }
+    tmux.send_keys :Escape
+    tmux.prepare
+
+    # Verify kept entries are still there
+    tmux.send_keys 'C-r'
+    tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
+    tmux.send_keys 'to-keep'
+    tmux.until { |lines| assert_equal 1, lines.match_count }
+    tmux.send_keys :Enter
+    tmux.until { |lines| assert_equal 'echo to-keep', lines[-1] }
+    tmux.send_keys 'C-c'
+  end
+
   def test_dynamic_completion_loader
     tmux.paste 'touch /tmp/foo; _fzf_completion_loader=1'
     tmux.paste '_completion_loader() { complete -o default fake; }'
@@ -920,6 +969,7 @@ class TestZsh < TestBase
   end
 
   test_perl_and_awk 'ctrl_r_multiline_index_collision' do
+    tmux.send_keys 'setopt sh_glob', :Enter
     # Leading number in multi-line history content is not confused with index
     prepare_ctrl_r_test
     tmux.send_keys "'line 1"

typos.toml

@@ -5,6 +5,7 @@ fo = "fo"
 enew = "enew"
 tabe = "tabe"
 Iterm = "Iterm"
+ser = "ser"
 
 [files]
-extend-exclude = ["README.md"]
+extend-exclude = ["README.md", "*.s"]