add demo sources: VHS tapes, helper scripts, and tutorial

Tracks the inputs that drive `mage demo` so the GIFs and screenshots
under demo/assets/ can be reproduced from a checkout. The generated
assets themselves (~50 MB of GIFs and PNGs) are excluded via gitignore
since they're fully reproducible from the tapes in ~10 min.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

19 files changed, 774 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 86a6136..0649d46 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,4 @@ perltidy.ERR
 /.cursor/
 REVIEW-COMMENTS.md
 /.serena/
+/demo/assets/
diff --git a/demo/TUTORIAL.md b/demo/TUTORIAL.md
new file mode 100644
index 0000000..5940d05
--- /dev/null
+++ b/demo/TUTORIAL.md
@@ -0,0 +1,200 @@
+# I/O Riot NG: a guided tour
+
+This tutorial walks through every major surface of `ior` — the dashboard tabs, the live stream, recording, headless modes, and the in-TUI flamegraph — using short animated GIFs so you can *see* what the keys actually do.
+
+Every GIF in this document is regenerated from a [VHS](https://github.com/charmbracelet/vhs) tape under [`demo/tapes/`](./tapes). To rebuild them all, run `sudo -v && mage demo` (see [Regenerating the demo](#regenerating-the-demo)).
+
+## Contents
+
+1. [Installing ior](#installing-ior)
+2. [First launch: the PID picker](#first-launch-the-pid-picker)
+3. [Touring the dashboard tabs](#touring-the-dashboard-tabs)
+   - [1 · Flamegraph (default landing tab)](#1--flamegraph-default-landing-tab)
+   - [2 · Overview](#2--overview)
+   - [3 · Syscalls](#3--syscalls)
+   - [4 · Files](#4--files)
+   - [5 · Processes](#5--processes)
+   - [6 · Latency + Gaps](#6--latency--gaps)
+   - [7 · Stream](#7--stream)
+4. [Mastering the Stream tab](#mastering-the-stream-tab)
+   - [Pause + stacked filters](#pause--stacked-filters)
+   - [Regex search](#regex-search)
+   - [CSV export](#csv-export)
+5. [Choosing what to trace](#choosing-what-to-trace)
+6. [Recording for offline analysis](#recording-for-offline-analysis)
+   - [TUI Parquet recording](#tui-parquet-recording)
+   - [Headless modes](#headless-modes)
+7. [Regenerating the demo](#regenerating-the-demo)
+
+## Installing ior
+
+See the [main README](../README.md) for full install steps. In short:
+
+```shell
+git clone https://codeberg.org/snonux/ior ~/git/ior
+git clone https://github.com/aquasecurity/libbpfgo ~/git/libbpfgo
+sudo dnf install -y golang clang bpftool elfutils-libelf-devel zlib-static glibc-static libzstd-static
+git -C ~/git/libbpfgo checkout v0.9.2-libbpf-1.5.1
+git -C ~/git/libbpfgo submodule update --init --recursive
+make -C ~/git/libbpfgo libbpfgo-static
+cd ~/git/ior
+env GOTOOLCHAIN=auto mage all
+```
+
+ior needs `CAP_BPF`, so every invocation below uses `sudo`.
+
+The build dance only has to happen once: the resulting `ior` binary is fully statically linked (libbpf, libelf, libzstd, zlib are baked in) **and** the embedded BPF object uses CO-RE, so libbpf relocates field offsets against the target kernel's BTF at load time. Build it on one box, then `scp ior` to any other Linux host with a BTF-enabled kernel and run it there. See the [Compile once, run everywhere](../README.md#compile-once-run-everywhere) section in the main README for details.
+
+## First launch: the PID picker
+
+`sudo ./ior` starts with the **PID picker**. The cursor is on **All PIDs**, so pressing `Enter` traces the whole system. Type into the filter box to narrow the list by PID, comm, or cmdline; arrow keys move the selection.
+
+![Cold start: PID picker, then the dashboard appears](./assets/01-launch.gif)
+
+The same picker can be re-opened later from the dashboard with `p`.
+
+![PID picker default state](./assets/screenshot-pidpicker.png)
+
+## Touring the dashboard tabs
+
+The dashboard has seven tabs, addressable by number key. The default landing tab is **Flamegraph**. `tab` / `shift+tab` step forward / back.
+
+| Key | Tab               | What it shows                                                            |
+|-----|-------------------|--------------------------------------------------------------------------|
+| `1` | Flamegraph (`Flm`)| Live FlameGraph of the configured stack (`comm`/`path`/`tracepoint`)     |
+| `2` | Overview (`Ovr`)  | Sparkline + top syscalls + top paths summary                             |
+| `3` | Syscalls (`Sys`)  | Sortable per-syscall counters, latency, byte volume                      |
+| `4` | Files (`Fil`)     | Per-path counters; `d` toggles directory grouping                        |
+| `5` | Processes (`Pro`) | Per-process / per-comm counters                                          |
+| `6` | Latency (`Lat`)   | Latency + inter-syscall gap histograms                                   |
+| `7` | Stream (`Str`)    | Live tail of individual traced events                                    |
+
+### 1 · Flamegraph (default landing tab)
+
+The first thing you see after dismissing the PID picker is the **live flamegraph**. Bars grow as new events come in. `o` cycles the stack ordering (e.g. `comm/path/tracepoint` ↔ `comm/tracepoint/path`); `b` toggles the size metric (event count vs. duration vs. gap).
+
+![Live flamegraph rebuilding from real workload](./assets/13-tui-flamegraph.gif)
+
+### 2 · Overview
+
+Press `2`. The Overview tab is the at-a-glance view: a sparkline of recent event volume, the top syscalls, and the top paths.
+
+![Overview tab populating](./assets/02-overview-tab.gif)
+
+### 3 · Syscalls
+
+Press `3`. A sortable table of every traced syscall (count, average latency, total bytes). `j` / `k` (or arrow keys) scroll the rows; `←` / `→` move the selected column; `s` sorts by the selected column using its default direction; `S` reverses.
+
+![Syscalls table with sort + reverse-sort](./assets/03-syscalls-tab.gif)
+
+### 4 · Files
+
+Press `4`. Per-path counters. The most useful key here is `d`, which toggles **directory grouping** — paths roll up into their parent directory, which is essential when one process touches thousands of files in `/usr/share/...`.
+
+![Files tab toggling directory grouping](./assets/04-files-tab.gif)
+
+### 5 · Processes
+
+Press `5`. Per-process / per-comm view. `S` reverse-sorts; combine with `←` / `→` to pick a column.
+
+![Processes tab](./assets/05-processes-tab.gif)
+
+### 6 · Latency + Gaps
+
+Press `6`. Two histograms: syscall **latency** (how long the syscall ran) and the inter-syscall **gap** (idle time on the same thread between syscalls). The big-write workload running in the background spreads the latency distribution noticeably.
+
+![Latency + gap histograms](./assets/06-latency-gaps-tab.gif)
+
+### 7 · Stream
+
+Press `7`. A live tail of every traced event row — comm, PID, TID, syscall, file, FD, return value, bytes, latency, gap. This is the workhorse view; the next section explores it in depth.
+
+![Stream tab live-tailing rows](./assets/07-stream-live.gif)
+
+## Mastering the Stream tab
+
+Stream has two modes: **Live** (rows scroll past) and **Pause** (`space` toggles). Almost everything interesting happens in pause mode.
+
+### Pause + stacked filters
+
+In pause mode, navigate with `j`/`k` (rows) and `←` / `→` (columns). Pressing `Enter` on the selected cell **pushes a new filter onto a stack** and immediately re-filters the ring buffer. Filters are stackable, so you can drill down — first by `Comm`, then by `Syscall`, then by `File`. `Esc` pops the most recent filter (LIFO); keep hitting `Esc` to undo all the way back.
+
+![Pause, push two filters, undo with Esc](./assets/08-stream-pause-filter.gif)
+
+The filter is reflected in the bottom status line, and matches the same syntax you'd type by hand: `comm~bash`, `syscall~openat`, `latency>=100000`, etc.
+
+### Regex search
+
+`/` opens a forward regex prompt; `?` opens a backward one. `n` jumps to the next match in the same direction; `N` reverses. The search runs against every column on every row in the ring buffer and wraps at the end.
+
+![Regex search with /, n, n, then ?](./assets/09-stream-regex-search.gif)
+
+### CSV export
+
+Three keys, three flavours:
+
+- `e` — quick export of the **current TUI-filter snapshot** to `ior-stream-<timestamp>.csv` in the current working directory. Works from any tab, not just Stream.
+- `x` — quick export of the **paused stream view** specifically (preserves your filter stack).
+- `X` — same as `x`, but prompts for a filename first.
+- `E` — open the most recent stream-exported CSV in your `$EDITOR` (`hx` / `vi` fallback).
+
+![Press 'e', then ls the resulting CSV](./assets/10-stream-csv-export.gif)
+
+If you don't want CSV export at all, start ior with `-tuiExport=false`; the help footer hides the export keys and `e` becomes a no-op.
+
+## Choosing what to trace
+
+Three modal pickers reshape what the rest of the TUI sees:
+
+- `p` — **PID picker** (re-opens the launch picker).
+- `t` — **TID picker** for thread-level focus.
+- `o` — **Probes** dialog: enable / disable individual syscall tracepoints.
+
+![PID, TID, and probe pickers](./assets/11-pid-tid-probe.gif)
+
+Restricting to a single PID is also exposed as a CLI flag (`-pid <n>`), as is comm/path filtering (`-comm`, `-path`). Tracepoint subsetting on the command line uses `-tps <regex>` / `-tpsExclude <regex>`.
+
+## Recording for offline analysis
+
+ior has three persistence flows; each solves a different problem.
+
+| Flow                   | How                                          | What you get                                            |
+|------------------------|----------------------------------------------|---------------------------------------------------------|
+| TUI Parquet recording  | `R` from the dashboard                       | streaming Parquet of every row that passes your filter  |
+| Headless `.ior.zst`    | `sudo ./ior -flamegraph -name <name>`        | one aggregated native trace artifact (bandwidth-cheap)  |
+| Headless Parquet       | `sudo ./ior -parquet trace.parquet`          | streaming Parquet, full firehose, no TUI                |
+| Plain CSV              | `sudo ./ior -plain`                          | one CSV row per event on stdout                         |
+
+### TUI Parquet recording
+
+Press `R` in the dashboard, accept the default filename (`ior-recording-<timestamp>.parquet`) with `Enter`, and rows start streaming to disk. The footer shows the active recording path (or the last error). Press `R` again to stop.
+
+![Start, run, and stop a parquet recording](./assets/12-parquet-recording.gif)
+
+The recorder follows your *current* TUI global filter — narrow with `p`/`t`/`o` first if you want a focused capture.
+
+### Headless modes
+
+For unattended captures or scripting, skip the TUI entirely. The demo runs all three back-to-back, capped with `-duration` so each terminates on its own.
+
+![Three headless flows in one tape](./assets/14-headless-modes.gif)
+
+`-flamegraph` writes one aggregated `.ior.zst` artifact at shutdown — ideal for `ior`'s native flamegraph and integration workflows. `-parquet` streams every row, so the file grows continuously. `-plain` is the lightest weight: CSV to stdout you can pipe into anything.
+
+## Regenerating the demo
+
+The whole asset pipeline is reproducible:
+
+```shell
+mage installDemoTools          # one-time: VHS via go install + ttyd via dnf
+sudo -v                        # warm the sudo timestamp once
+mage demo                      # regen all 14 GIFs + screenshots (~10 min)
+```
+
+Or rebuild a single tape after editing it:
+
+```shell
+TAPE=07-stream-live mage demoOne
+```
+
+Tapes live in [`demo/tapes/`](./tapes), the background workload that drives them is [`demo/scripts/workload.sh`](./scripts/workload.sh), and the resulting assets land in [`demo/assets/`](./assets). VHS records headlessly under `ttyd` + Chromium — no real terminal window opens, so `mage demo` is safe to run in the background while you keep working.
diff --git a/demo/scripts/run-tape.sh b/demo/scripts/run-tape.sh
new file mode 100755
index 0000000..c22e2e3
--- /dev/null
+++ b/demo/scripts/run-tape.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# One-tape wrapper: starts the background workload, runs vhs <tape>, kills the
+# workload. Tapes themselves don't need to know about the workload — they just
+# launch ior and drive the TUI.
+#
+# vhs is invoked with cwd set to the repo root, so all paths inside tapes
+# (Output, Screenshot, the ./ior binary) are repo-relative.
+#
+# Usage: run-tape.sh <path-to-tape>
+
+set -euo pipefail
+
+if [ $# -ne 1 ]; then
+    echo "usage: $0 <tape-file>" >&2
+    exit 2
+fi
+
+TAPE="$(realpath "$1")"
+ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
+WORKLOAD="${ROOT}/demo/scripts/workload.sh"
+
+if [ ! -f "$TAPE" ]; then
+    echo "tape not found: $TAPE" >&2
+    exit 2
+fi
+
+# Pre-flight: vhs and ttyd must be on PATH; sudo timestamp must be live.
+command -v vhs >/dev/null || { echo "vhs not on PATH (run: mage installDemoTools)" >&2; exit 3; }
+command -v ttyd >/dev/null || { echo "ttyd not on PATH (run: mage installDemoTools)" >&2; exit 3; }
+sudo -n true 2>/dev/null || { echo "sudo timestamp expired (run: sudo -v)" >&2; exit 4; }
+
+# Start workload in its own session/process group so we can kill the whole tree.
+setsid "$WORKLOAD" </dev/null >/dev/null 2>&1 &
+WL_PID=$!
+
+cleanup() {
+    if kill -0 "$WL_PID" 2>/dev/null; then
+        # The workload runs `setsid` so its PID == its PGID.
+        kill -TERM -- "-$WL_PID" 2>/dev/null || true
+        sleep 0.5
+        kill -KILL -- "-$WL_PID" 2>/dev/null || true
+    fi
+    # Best-effort: stop any straggling ior processes from this tape.
+    sudo -n pkill -TERM -f '/ior$' 2>/dev/null || true
+}
+trap cleanup EXIT INT TERM
+
+# Give the workload a moment to spool up before recording.
+sleep 2
+
+cd "$ROOT"
+vhs "$TAPE"
diff --git a/demo/scripts/sudo-keepalive.sh b/demo/scripts/sudo-keepalive.sh
new file mode 100755
index 0000000..4ae1e27
--- /dev/null
+++ b/demo/scripts/sudo-keepalive.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# Refreshes the sudo timestamp every minute so a long demo regen never trips a
+# password prompt. Intended to be backgrounded by `mage demo` and killed at the
+# end of the run.
+
+set -u
+
+trap 'exit 0' TERM INT
+
+while true; do
+    sudo -n true 2>/dev/null || exit 1
+    sleep 60
+done
diff --git a/demo/scripts/workload.sh b/demo/scripts/workload.sh
new file mode 100755
index 0000000..ebbf58b
--- /dev/null
+++ b/demo/scripts/workload.sh
@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+# Background workload for demo tapes. Generates a steady mix of file I/O
+# (open/read/close), big writes (fsync/dd), stat-heavy traffic, and ioworkload
+# scenarios so every TUI tab has something interesting to display.
+#
+# Designed to be killed via `kill $!` from the tape wrapper. All children are
+# placed in this script's process group so a single signal cleans them up.
+
+set -u
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+IOWORKLOAD="${ROOT}/../ioworkload"
+SCRATCH="$(mktemp -d -t ior-demo-workload-XXXXXX)"
+trap 'rm -rf "$SCRATCH"' EXIT
+
+cleanup() {
+    trap - TERM INT
+    # Kill the entire process group so all background loops stop.
+    kill -- -$$ 2>/dev/null || true
+    exit 0
+}
+trap cleanup TERM INT
+
+# A) walk /usr and read first byte of each file: tons of openat/read/close + varied paths.
+(
+    while true; do
+        find /usr/share /usr/lib -maxdepth 4 -type f 2>/dev/null \
+            | shuf -n 800 \
+            | xargs -r -I{} sh -c 'head -c 1 "{}" >/dev/null 2>&1' || true
+        sleep 1
+    done
+) &
+
+# B) periodic large write with fsync via dd: fills the latency tab with slow writes.
+(
+    while true; do
+        dd if=/dev/zero of="${SCRATCH}/big.bin" bs=1M count=20 conv=fsync status=none 2>/dev/null || true
+        sleep 3
+        rm -f "${SCRATCH}/big.bin"
+    done
+) &
+
+# C) stat-heavy directory crawl: feeds the syscall tab with newfstatat/getdents.
+(
+    while true; do
+        find /etc /var/log -maxdepth 3 >/dev/null 2>&1 || true
+        sleep 2
+    done
+) &
+
+# D) ioworkload scenario rotation if the binary exists: gives us syscall variety
+# beyond what the shell utilities trigger (mmap, dup, fcntl, sync, rename, link).
+if [ -x "$IOWORKLOAD" ]; then
+    (
+        scenarios=(
+            open-basic
+            readwrite-basic
+            stat-basic
+            stat-statx
+            mmap-basic
+            sync-basic
+            dup-basic
+            fcntl-dupfd
+            rename-basic
+            link-basic
+            dir-basic
+        )
+        while true; do
+            for s in "${scenarios[@]}"; do
+                "$IOWORKLOAD" --scenario="$s" >/dev/null 2>&1 || true
+            done
+        done
+    ) &
+fi
+
+# Idle until killed.
+wait
diff --git a/demo/tapes/01-launch.tape b/demo/tapes/01-launch.tape
new file mode 100644
index 0000000..1e2b558
--- /dev/null
+++ b/demo/tapes/01-launch.tape
@@ -0,0 +1,23 @@
+# 01-launch: cold start of ior. Shows the PID picker, then the default landing tab
+# (Flamegraph) once Enter selects "All PIDs".
+Output demo/assets/01-launch.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 4500ms
+Screenshot demo/assets/screenshot-pidpicker.png
+Sleep 1500ms
+Enter
+Sleep 5s
+Screenshot demo/assets/screenshot-dashboard.png
+Sleep 2s
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/02-overview-tab.tape b/demo/tapes/02-overview-tab.tape
new file mode 100644
index 0000000..a16a0b8
--- /dev/null
+++ b/demo/tapes/02-overview-tab.tape
@@ -0,0 +1,23 @@
+# 02-overview-tab: dashboard Overview tab — sparkline, top syscalls, top paths fill in.
+# Key 2 switches to Overview (key 1 is Flamegraph, the default landing tab).
+Output demo/assets/02-overview-tab.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "2"
+Sleep 6s
+Screenshot demo/assets/screenshot-overview.png
+Sleep 1s
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/03-syscalls-tab.tape b/demo/tapes/03-syscalls-tab.tape
new file mode 100644
index 0000000..376f632
--- /dev/null
+++ b/demo/tapes/03-syscalls-tab.tape
@@ -0,0 +1,36 @@
+# 03-syscalls-tab: sortable syscalls table, j/k to scroll, s/S to sort/reverse-sort.
+# Key 3 switches to Syscalls.
+Output demo/assets/03-syscalls-tab.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "3"
+Sleep 3s
+Type "j"
+Sleep 400ms
+Type "j"
+Sleep 400ms
+Type "j"
+Sleep 800ms
+Type "k"
+Sleep 600ms
+Right
+Sleep 600ms
+Type "s"
+Sleep 1500ms
+Type "S"
+Sleep 2s
+Screenshot demo/assets/screenshot-syscalls.png
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/04-files-tab.tape b/demo/tapes/04-files-tab.tape
new file mode 100644
index 0000000..49adfee
--- /dev/null
+++ b/demo/tapes/04-files-tab.tape
@@ -0,0 +1,32 @@
+# 04-files-tab: files tab plus directory-grouped view toggle (`d`).
+# Key 4 switches to Files.
+Output demo/assets/04-files-tab.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "4"
+Sleep 3s
+Type "j"
+Sleep 400ms
+Type "j"
+Sleep 400ms
+Type "j"
+Sleep 800ms
+Type "d"
+Sleep 3s
+Screenshot demo/assets/screenshot-files-grouped.png
+Type "d"
+Sleep 2s
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/05-processes-tab.tape b/demo/tapes/05-processes-tab.tape
new file mode 100644
index 0000000..ad5f64e
--- /dev/null
+++ b/demo/tapes/05-processes-tab.tape
@@ -0,0 +1,30 @@
+# 05-processes-tab: processes tab, scroll, and reverse-sort.
+# Key 5 switches to Processes.
+Output demo/assets/05-processes-tab.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "5"
+Sleep 3s
+Type "j"
+Sleep 400ms
+Type "j"
+Sleep 400ms
+Type "j"
+Sleep 800ms
+Type "S"
+Sleep 2s
+Screenshot demo/assets/screenshot-processes.png
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/06-latency-gaps-tab.tape b/demo/tapes/06-latency-gaps-tab.tape
new file mode 100644
index 0000000..b19ae58
--- /dev/null
+++ b/demo/tapes/06-latency-gaps-tab.tape
@@ -0,0 +1,22 @@
+# 06-latency-gaps-tab: latency + inter-syscall gap histograms (driven by dd writes).
+# Key 6 switches to Latency.
+Output demo/assets/06-latency-gaps-tab.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "6"
+Sleep 8s
+Screenshot demo/assets/screenshot-latency.png
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/07-stream-live.tape b/demo/tapes/07-stream-live.tape
new file mode 100644
index 0000000..9d7ad4f
--- /dev/null
+++ b/demo/tapes/07-stream-live.tape
@@ -0,0 +1,22 @@
+# 07-stream-live: stream tab live-tailing rows.
+# Key 7 switches to Stream.
+Output demo/assets/07-stream-live.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "7"
+Sleep 6s
+Screenshot demo/assets/screenshot-stream-live.png
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/08-stream-pause-filter.tape b/demo/tapes/08-stream-pause-filter.tape
new file mode 100644
index 0000000..416830c
--- /dev/null
+++ b/demo/tapes/08-stream-pause-filter.tape
@@ -0,0 +1,46 @@
+# 08-stream-pause-filter: pause stream, navigate cells, push two filters onto the stack, undo with Esc.
+# Key 7 switches to Stream.
+Output demo/assets/08-stream-pause-filter.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "7"
+Sleep 4s
+Space
+Sleep 1s
+Down
+Sleep 300ms
+Down
+Sleep 300ms
+Down
+Sleep 800ms
+Right
+Sleep 500ms
+Right
+Sleep 500ms
+Enter
+Sleep 1500ms
+Down
+Sleep 400ms
+Right
+Sleep 400ms
+Enter
+Sleep 2s
+Screenshot demo/assets/screenshot-stream-filtered.png
+Escape
+Sleep 1s
+Escape
+Sleep 1500ms
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/09-stream-regex-search.tape b/demo/tapes/09-stream-regex-search.tape
new file mode 100644
index 0000000..b643740
--- /dev/null
+++ b/demo/tapes/09-stream-regex-search.tape
@@ -0,0 +1,40 @@
+# 09-stream-regex-search: regex search forward (/), n to advance, ? for backward.
+# Key 7 switches to Stream.
+Output demo/assets/09-stream-regex-search.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "7"
+Sleep 4s
+Space
+Sleep 1s
+Type "/"
+Sleep 600ms
+Type "openat"
+Sleep 700ms
+Enter
+Sleep 1500ms
+Type "n"
+Sleep 800ms
+Type "n"
+Sleep 800ms
+Screenshot demo/assets/screenshot-stream-search.png
+Type "?"
+Sleep 600ms
+Type "stat"
+Sleep 700ms
+Enter
+Sleep 1500ms
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/10-stream-csv-export.tape b/demo/tapes/10-stream-csv-export.tape
new file mode 100644
index 0000000..c1f4935
--- /dev/null
+++ b/demo/tapes/10-stream-csv-export.tape
@@ -0,0 +1,28 @@
+# 10-stream-csv-export: 'e' to export current filtered stream snapshot, then ls the CSV produced.
+# Key 7 switches to Stream.
+Output demo/assets/10-stream-csv-export.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "7"
+Sleep 4s
+Type "e"
+Sleep 2s
+Screenshot demo/assets/screenshot-stream-export.png
+Sleep 1s
+Type "q"
+Sleep 1s
+Type "ls -lh ior-stream-*.csv"
+Enter
+Sleep 2s
diff --git a/demo/tapes/11-pid-tid-probe.tape b/demo/tapes/11-pid-tid-probe.tape
new file mode 100644
index 0000000..caccc48
--- /dev/null
+++ b/demo/tapes/11-pid-tid-probe.tape
@@ -0,0 +1,41 @@
+# 11-pid-tid-probe: re-open PID picker (p), TID picker (t), probe toggle dialog (o).
+Output demo/assets/11-pid-tid-probe.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "p"
+Sleep 2s
+Down
+Sleep 400ms
+Down
+Sleep 400ms
+Screenshot demo/assets/screenshot-pidpicker-open.png
+Escape
+Sleep 1s
+Type "t"
+Sleep 2s
+Screenshot demo/assets/screenshot-tidpicker.png
+Escape
+Sleep 1s
+Type "o"
+Sleep 2s
+Down
+Sleep 400ms
+Down
+Sleep 400ms
+Screenshot demo/assets/screenshot-probes.png
+Escape
+Sleep 1s
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/12-parquet-recording.tape b/demo/tapes/12-parquet-recording.tape
new file mode 100644
index 0000000..c6f3399
--- /dev/null
+++ b/demo/tapes/12-parquet-recording.tape
@@ -0,0 +1,28 @@
+# 12-parquet-recording: start parquet recording (R), accept default filename (Enter), dwell, stop (R), exit, ls the file.
+Output demo/assets/12-parquet-recording.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior"
+Enter
+Sleep 5s
+Enter
+Sleep 4s
+Type "R"
+Sleep 1500ms
+Enter
+Sleep 4s
+Screenshot demo/assets/screenshot-recording-active.png
+Type "R"
+Sleep 1500ms
+Type "q"
+Sleep 1s
+Type "ls -lh ior-recording-*.parquet"
+Enter
+Sleep 2s
diff --git a/demo/tapes/13-tui-flamegraph.tape b/demo/tapes/13-tui-flamegraph.tape
new file mode 100644
index 0000000..7572159
--- /dev/null
+++ b/demo/tapes/13-tui-flamegraph.tape
@@ -0,0 +1,22 @@
+# 13-tui-flamegraph: in-TUI flamegraph view. The default landing tab (key `1`) is the
+# live flamegraph. Workload running in the background drives real frame data.
+# `-fields` and `-count` let you reshape stack ordering and the size metric.
+Output demo/assets/13-tui-flamegraph.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior -fields comm,path,tracepoint -count count"
+Enter
+Sleep 5s
+Enter
+Sleep 8s
+Screenshot demo/assets/screenshot-flamegraph.png
+Sleep 2s
+Type "q"
+Sleep 1s
diff --git a/demo/tapes/14-headless-modes.tape b/demo/tapes/14-headless-modes.tape
new file mode 100644
index 0000000..ce894f6
--- /dev/null
+++ b/demo/tapes/14-headless-modes.tape
@@ -0,0 +1,38 @@
+# 14-headless-modes: all three headless flows in one tape — -flamegraph -name (.ior.zst),
+# -parquet (streaming rows), -plain (CSV to stdout). Each capped with -duration so the demo terminates.
+Output demo/assets/14-headless-modes.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "# 1) Aggregated native trace artifact (.ior.zst)"
+Enter
+Sleep 800ms
+Type "sudo -n /home/paul/git/ior/ior -flamegraph -name demo-trace -duration 5"
+Enter
+Sleep 7s
+Type "ls -lh demo-trace*.ior.zst"
+Enter
+Sleep 2s
+
+Type "# 2) Per-row streaming Parquet"
+Enter
+Sleep 800ms
+Type "sudo -n /home/paul/git/ior/ior -parquet demo.parquet -duration 5"
+Enter
+Sleep 7s
+Type "ls -lh demo.parquet"
+Enter
+Sleep 2s
+
+Type "# 3) Plain CSV to stdout (head only)"
+Enter
+Sleep 800ms
+Type "sudo -n /home/paul/git/ior/ior -plain -duration 3 2>/dev/null | head -n 8"
+Enter
+Sleep 6s