0.6.8

What's new

• /optchat settings (#50). A per-profile settings page, saved in the profile's config.json: compactor and subagent models, subagent levels, max active agents, Previous exchange (on/off and its size limit) and summary size tolerance. Every row shows its value and its default. /optchat model and /optchat agents model still work as shortcuts. The last-exchange study behind the Previous exchange default is in this comment.
• Previous exchange is capped (#41). The last exchange is still replayed in full, but one over 16 KB is dropped, and the agent reads it from memory instead.
• Turns wait only for summaries (#42). A turn no longer also waits for the memory view to fit its budget, which matches Victor's recipe.
• A real sample line for the compactor (#43). The dot-padded example line is replaced with an exact 512-byte sample, so its wording stops leaking into summaries.
• Merged lines must save space (#49). A summary is kept without a retry only if it fits the size tolerance and is smaller than the lines it replaces.
• Fixes from @aaaxn (#44, #45, #46, #47, #48), thank you:
  • cache marks survive a summary that quotes </chat>
  • bad usage records are rejected
  • Tab toggles in the import picker
  • run state changes can no longer be corrupted by a late stop, close or tell
  • a stale "Waiting for summaries" message is cleared, and import time, chain and YAML parsing are fixed
  • a second writer on a profile log is refused
• Profile lock and early stops (#51). The lock and window sockets now live in the profile folder, so Pis with different TMPDIRs share one lock. A file that only shares a socket's name is refused, never deleted. A subagent stopped before its first request no longer runs its task.
• A banner on pi.dev (#52). The package now has a preview image in the Pi package gallery and the README.

Upgrading

• Subagent levels now default to 1 (Victor's flat recipe: subagents don't spawn their own). To keep the old nesting, set Subagent levels to 3 in /optchat settings.
• Restart every Pi window after updating. The profile lock moved, so an old and a new Pi would not see each other's lock.

146 tests.