# ─────────────────────────────────────────────────────────────────────────────
# arms_fire_lag.txt — j147: the ONE-TICK DETECTION LAG, four arms on the frozen
# movement panel (tools/ab/panel_movement.txt). Two movers (tfil, strafe) x
# {lag 0, lag 1}; the lag knob is the ONLY difference inside a mover pair.
#
# WHY. MEASURED LIVE (common_libs/tests/measure_fire_ghost_lag.py, 4 sessions,
# 1777 matched ghost spawns): the server dispatches a turn's fire AFTER our
# go() for that same turn, so the energy drop of a turn-T shot first reaches our
# scan at turn T+1 (our bot tick T). A bullet takes its FIRST step during the
# turn it is fired, so by then the true bullet is already `speed` px (11..20 px,
# one whole bullet step) downrange and the arrival deadline is a full tick short.
# Both movers place the ghost at the SCANNED enemy position, i.e. exactly where
# the bullet was born: the whole ghost trajectory is the true one shifted one
# turn later. The measured ghost-vs-observer displacement is 19.1 px mean /
# 22.0 p90 (tfil) and 16.1 / 21.8 (strafe), deadline error 0.99 / 0.77 ticks.
# With TR_FIRE_LAG=1 the displacement falls to 5.4 / 9.0 px (the residue is the
# ENEMY's own scan staleness, <= 8 px) and the deadline error to 0.06 ticks.
#
# `TR_FIRE_LAG` default 0 = today's behaviour byte for byte, so arm 1 and arm 3
# ARE the shipped movers.
#
# Pre-registered in docs/movement_campaign.md ("Batch 8 — the fire-detection
# lag") BEFORE any of these battles ran. References: `tfil_off`, `strafe_off`.
#
# Format: name | ENV=value ENV=value | label
# ─────────────────────────────────────────────────────────────────────────────

# 1. tfil as shipped (the reference for arm 2).
tfil_off | TR_MOVEMENT=tfil | today's tfil, the ghost is born at the scanned enemy (reference)

# 2. tfil with the measured lag back-dated at spawn.
tfil_lag1 | TR_MOVEMENT=tfil TR_FIRE_LAG=1 | tfil, every detected fire back-dated one bullet step

# 3. strafe as shipped (the reference for arm 4).
strafe_off | TR_MOVEMENT=strafe | today's strafe, the ghost is born at the scanned enemy (reference)

# 4. strafe with the measured lag back-dated at spawn.
strafe_lag1 | TR_MOVEMENT=strafe TR_FIRE_LAG=1 | strafe, every detected fire back-dated one bullet step