The trade journal learns about exits only by diffing consecutive position
snapshots. On 2026-10-02 TNON was bought at 09:38:37 and its bracket stop filled
at 09:39:26, so no snapshot ever held it and no position_closed was written: the
80-trade scorecard dropped a -1R loser and the re-entry bench fired on a trade the
journal did not have.
AlpacaPaperSync.reconcile_unseen_round_trips runs after the snapshot diff on every
sync. For a symbol open in neither snapshot that has a filled buy and a filled sell
submitted this session (ET), it emits one position_closed per unjournaled exit fill:
entry is the VWAP of the buy fills, exit the sell's fill, stop the session's stop
order, position_id the exit's broker order id. Exit ids already journaled (by the
diff path or an earlier run, seeded from the store) are skipped, so nothing is
double-counted across polls or restarts. Long round trips only; the bot is long-only.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LXxioW7HA18AY1gqnzA2HN
