v0.12.0

Added

• The main agent can work its subagents the way it works a shell. Every
  agent now has an id, named when it launches, in its result and in its
  completion notice, and four new tools take it back: agentsend messages
  an agent — a running one reads it after its current step, and a finished
  one resumes its conversation with it, so a follow-up question costs
  one message instead of a fresh agent starting over; agentoutput shows
  what an agent has been doing as a summary of its tool calls
  (Bash(curl -s …), one line each) and its final response, and with
  wait blocks until it finishes, its cell streaming each call as it
  starts; agentkill stops a running agent while keeping it resumable; and
  agentlist names every agent of the session. An answer agentoutput
  already handed the main agent is not followed by a notice repeating it,
  and finished agents stay resumable — up to the 16 most recent — after their
  roster rows are gone. The id also shows on the agent's Ctrl+O cell
  (docs/agent-tools.md).
• The main agent knows when you talked to a subagent yourself. A
  message you type into an agent's session view now reaches the main agent
  as yours: the notice of the agent's answer — or a waiting agent's result —
  lists what you sent it, saying it came from you and not from the main
  agent, and agentoutput quotes it where it arrived. Before, the answer came
  back looking like part of the main agent's own conversation, and a chat
  with an agent that had finished in the foreground never reached the main
  agent at all (docs/agent-tools.md).

Fixed

• A running command's cell follows the rows that are still moving. The
  live Bash(…) cell showed the output's last four rows, which for a
  program that redraws in place — sudo pacman -Syy downloading its
  databases in parallel — were the bars that had already finished, while
  the ones still moving sat hidden in the +N lines count above them,
  visible only in Ctrl+O. The window now ends at the lowest row that changed
  within two seconds of the newest change, so the bars still downloading
  stay on screen and the finished ones are what folds away, the window never
  hides a row it has room for, and the footer counts every hidden row. A command whose newest output is at its end —
  every ordinary command — shows exactly the tail it always did; the
  subagent session view follows the same rule (docs/tool-streaming.md).

Full changelog: v0.11.0...v0.12.0