walk-backward

name	walk-backward
description	Backs the body up to a point behind it by TRANSLATING via moveTo to a destination in the opposite direction of facing. Use when a command mentions walk backward, walk backwards, back up, back away, step back, retreat, reverse, or go backwards. (To slide back while still facing forward, use moonwalk.)
category	locomotion
disable-model-invocation	true
subskills	["walk"]

walk-backward

Move to a spot behind the body. The simplest robust way is moveTo to a point in the opposite of the current facing.

How

• TRAVEL uses top-level moveTo. Compute a point BEHIND from state.position+state.faceDeg (0=+Z, 90=+X): x' = x - sin(face)*d, z' = z - cos(face)*d, d~1.5–2.5.
• durationMs ~2400–2800.
• NOTE: while moving, the engine turns to face its travel direction, so it ends up facing the way it backed toward. That's the right behavior for "back up / retreat". If the intent is to glide backward while STILL facing forward, use moonwalk instead.

Example

• "walk backwards" (at x:0,z:0,faceDeg:0) -> {"durationMs":2600,"moveTo":{"x":0,"z":-2},"say":"Backing up."}
• "back away from the stove" (at x:0,z:0,faceDeg:0) -> {"durationMs":2400,"moveTo":{"x":0,"z":-1.8},"say":"Backing off."}