Two connector improvements for the linked-bot chat experience, modelled on
codex / OpenClaw connect:
1. Built-in slash commands. A user can type /new (aliases /start, /reset) to
open a fresh session or /clear to wipe the current one, instead of the
message being forwarded to the agent. The command set is fixed (never
dynamically extended) so behaviour stays predictable. Matching requires the
whole message to be the bare command, so a normal question that merely starts
with a slash is forwarded untouched. Costs no agent turn / tokens.
- connect_command.go: channel-agnostic parser + action table (+ tests).
- sessionResetter optional interface; execForwarder (Claude family) and the
codex app-server forwarder both implement it. The main loop intercepts a
command right after the owner-decision interceptor and acks via webhook.
2. Persist codex per-conversation context. codexThreadSessions previously kept
the convID->threadID map in memory only, so a codex connector restart lost
every conversation's context — unlike the Claude-family convSessions store
which already persisted. The thread identity is now the authoritative,
mutex-guarded map persisted to <config>/connect/<clientId>/codex-threads.json
(best-effort, atomic write), restored on startup. An empty clientId keeps it
in memory only, preserving the original behaviour. This also removes a data
race on threadID by moving it off the per-conversation state into the
sessions store.
