The `out` trace tag logged only what the long-lived writer sent, drained after each command. Everything the session sends before the reader and writer split never reached it: `CMSG_AUTH_SESSION`, `CMSG_CHAR_ENUM`, `CMSG_PLAYER_LOGIN`, character create and delete, the cinematic ack and logout. So a login trace could not show where `CMSG_PLAYER_LOGIN` sits against `SMSG_LOGIN_VERIFY_WORLD`, which wire-timing work needs.
The world socket has one write path, `send_packet`. It now reports each packet to an observer right after the write, and the app installs the trace there only when the `out` tag is on. The writer's sent-log and its drains are gone; the line format is unchanged.
A protocol test over the fake server checks that the handshake, a pre-split send and a writer send are all observed, in order. A live login trace now opens with `CMSG_AUTH_SESSION`, `CMSG_CHAR_ENUM` and `CMSG_PLAYER_LOGIN`.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
1,039 comment lines become 472 across 19 files; the code is unchanged.
The movement test's claim that write() never serializes a transport
tail is gone: it does.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
