docs(CHANGELOG.md): update unreleased section (#117)

Author: github-actions[bot]

CHANGELOG.md

@@ -14,7 +14,7 @@
 
 ## Changed
 
-- The README hero GIF (`assets/hero.tape`) and the `dogfood/agent-uses-agent-tty/` Codex/Claude recordings now record inside a tmux two-pane split: the agent (or, in the hero, plain `agent-tty` CLI calls) drives a session on the left while `agent-tty dashboard` live-mirrors it on the right — showing the dashboard reacting as sessions are created and modified. Both panes share one `AGENT_TTY_HOME` so the dashboard auto-follows the newest session; the status bar is disabled so VHS's whole-screen `Wait+Screen` scrape stays unambiguous, and each run uses an isolated, reaped tmux server socket. The hero hides the tmux split plumbing and instead launches the dashboard on camera — typing `agent-tty dashboard` into the right pane and hopping back with the tmux prefix — and its panes/session run `bash --norc` with a minimal prompt so the live mirror stays free of personal shell-prompt clutter. It runs against this checkout's freshly-built CLI, since `agent-tty dashboard` is unreleased. A new `mise run demo:hero` task (which `depends` on `build`) regenerates the hero GIF, joining `mise run demo:agent-uses-agent-tty` for the agent recordings. `tmux` (`>= 3.1`, pinned to `3.6` in `mise`) is now a recorder prerequisite alongside `vhs`/`ttyd`/`ffmpeg`. The agent recordings now run concurrently via a bounded worker pool (`--concurrency`, default `2`) — each run is mostly an idle review-window sleep, so overlapping the two agents roughly halves wall-clock; raising the cap also overlaps an agent's own retry attempts at the cost of more CPU and shared-account load, while same-agent attempts stay serialized so two sessions of one account never record at once.
+- The README hero GIF (`assets/hero.tape`) and the `dogfood/agent-uses-agent-tty/` Codex/Claude recordings now record inside a tmux two-pane split: the agent (or, in the hero, plain `agent-tty` CLI calls) drives a session on the left while `agent-tty dashboard` live-mirrors it on the right — showing the dashboard reacting as sessions are created and modified. Both panes share one `AGENT_TTY_HOME` so the dashboard auto-follows the newest session; the status bar is disabled so VHS's whole-screen `Wait+Screen` scrape stays unambiguous, and each run uses an isolated, reaped tmux server socket. The hero hides the tmux split plumbing and instead launches the dashboard on camera — typing `agent-tty dashboard` into the right pane and hopping back with the tmux prefix — and its panes/session run `bash --norc` with a minimal prompt so the live mirror stays free of personal shell-prompt clutter. It runs against this checkout's freshly-built CLI, since `agent-tty dashboard` is unreleased. A new `mise run demo:hero` task (which `depends` on `build`) regenerates the hero GIF, joining `mise run demo:agent-uses-agent-tty` for the agent recordings. `tmux` (`>= 3.1`, pinned to `3.6` in `mise`) is now a recorder prerequisite alongside `vhs`/`ttyd`/`ffmpeg`. The agent recordings now run concurrently via a bounded worker pool (`--concurrency`, default `2`) — each run is mostly an idle review-window sleep, so overlapping the two agents roughly halves wall-clock; raising the cap also overlaps an agent's own retry attempts at the cost of more CPU and shared-account load, while same-agent attempts stay serialized so two sessions of one account never record at once ([#116](https://github.com/coder/agent-tty/pull/116)).
 - Spawned shells now default `PROMPT_EOL_MARK=` (empty) in the session environment, suppressing the inverse-video `%` end-of-partial-line marker that `zsh` prints when output lacks a trailing newline. agent-tty strips a hidden completion-marker postamble after each `run`, which desynced the rendered cursor and left that `%` in snapshots, screenshots, and recordings; the default keeps captures clean. The marker is zsh-only and inert in other shells. Opt back in per session with `agent-tty create --env PROMPT_EOL_MARK='%B%S%#%s%b' -- <shell>` to restore zsh's styled default (a lone `'%'` expands to nothing), or pass any explicit `--env PROMPT_EOL_MARK=...` value. The default is applied at PTY spawn time and is not written to the manifest, so `inspect`, `list`, and `create --json` env maps are unchanged ([#114](https://github.com/coder/agent-tty/pull/114)).
 - `inspect` collects renderer state and the session snapshot in a single synchronous tick before awaiting, so concurrent RPC handlers cannot interleave a mutated renderer state with a stale session snapshot ([#104](https://github.com/coder/agent-tty/pull/104)).