v0.7.1

0.7.1

• The turn-finished retain nudge is gone. A Stop hook cannot reach the
  model except through decision: "block" or exit 2, and the host renders
  either as a hook error; Stop is deliberately excluded from the four events
  whose stdout becomes context, so there was no other path. Rather than rework
  it, the nudge is removed: 0.7.0's idle nudge already does the job on every
  host through a supported path (UserPromptSubmit, chat.message,
  before_agent_start) and rides into a turn the user already started, where
  the turn-finished version cost an extra turn on all four hosts. Gone with it:
  hooks/scripts/stop.sh, hooks/scripts/retain-nudge.sh, the
  ach-memory hook retain-nudge subcommand, opencode's session.idle handler
  and pi's agent_settled handler, and both stop_hook_active emulations those
  two carried.
• Breaking: ACH_MEMORY_NUDGE_INTERVAL no longer exists.
  ACH_MEMORY_IDLE_INTERVAL (seconds, default 1800) is now the only nudge
  clock. Nothing is wired to the host's "turn finished" event.
• What this gives up: nothing nudges when the user stops prompting altogether,
  before a /clear or walking away. The idle stamp is keyed on the checkout
  rather than the session, so the next prompt still nudges, even in a fresh
  session; what is lost is retaining a claim whose context died with the
  /clear.
• retain no longer rejects a URL whose userinfo carries no password.
  scheme://user@host is the shape of an ordinary ssh git remote, and naming a
  repository's clone URL in a claim was refused as a secret with
  CONTENT_REJECTED_BY_SANITIZER and no indication of which span offended. The
  password form still rejects, and a token used as the username still trips the
  token patterns.

No service change; the release is the plugin.