v0.7.0

0.7.0

• Idle retain nudge. When nothing has been retained for a checkout in 30
  minutes, the user's next prompt carries one reminder to retain whatever
  durable claim has landed -- and then nothing for another 30 minutes in that
  session. The stdio proxy stamps every successful retain, so an agent that
  saves as it goes never sees the reminder. It rides into the turn the user
  just started, costing no extra turn: UserPromptSubmit on Claude Code and
  Codex, chat.message on opencode, before_agent_start on pi.
  ACH_MEMORY_IDLE_INTERVAL (seconds, default 1800) tunes it. The Stop
  nudge from 0.6.0 is unchanged and independent; a retain it triggers resets
  the idle clock.

• Session start says what this memory is. The activation text now opens
  with "This memory replaces your own": ach-memory is the system of record,
  host memory directories and built-in memory features are superseded and not
  to be written to while the server is reachable, and a claim is retained the
  moment it lands. Same text on all four hosts and for subagents
  (hooks/activation.subagent.json is generated from hooks/activation.txt;
  a test holds them together).

• Codex: the new UserPromptSubmit hook needs trusting once (t in the
  hooks review), like every other plugin hook.

• The service serves its own plugin bundle at /plugin. An npm pack
  tarball of this tree, packed outside the image (make plugin-tarball) and
  copied in as one artifact, so a host can install over plain HTTPS with no
  git and no registry, and the bundle can never disagree with the service it
  is configured against. The documented service prefix moves to
  /ach-memory; see docs/hosts.md.

Service change: a production roll is required for /plugin.