sporel-module-vagrant-skeleton

F.vagrant Tier-1 test-chamber: single player as a 13-bone humanoid puppet, WASD movement, camera-chase, multi-target look-at (body lazy-tracks mouse via slerp, head snaps to mouse with ±60° clamp). Demonstrates the Subterrain-style puppet control model: leg orientation decoupled from body via procedural callback, foot-body-orientation ("tactical twist"), scale-deformation walk cycle, and inheritance-decoupled foot sprites.

Version: 0.4.3 Module-ID: vagrant-skeleton Requires: lib-core.input >=0.4.0, lib-core.camera >=0.3.0, lib-core.render >=0.1.0, lib-core.maps >=0.1.2, lib-core.puppet >=0.4.3, lib-asset.prototype-subterrain >=0.1.0 Tags: test-chamber, puppet, walking-sim

Topology

Controls

• W A S D — direct movement (4-way, normalized for diagonals)
• Mouse — body + head look-at targets (same position, different smoothing)
• ESC — return to launcher

Demonstrates

• lib-core.puppet v0.4.3 integration:
  • Multi-look-target: body "soft" (slerp=6, lazy) + head "aim" (instant-snap, ±60° clamp)
  • Scale-deformation walk cycle: leg.scl_y cycles +1/0/-1 via keyframe animation
  • Procedural leg orientation: legs face walk direction independent of body rotation
  • Foot-body-orientation ("tactical twist"): feet face body direction, not leg direction
  • inherit_scale: false on feet: feet do not Y-flip when leg.scl_y goes negative
  • Per-channel conflict guard: walk animation (scl) + procedural (rot) on same leg bones
  • Camera in camera.begin()/finish() block for correct world-space rendering
• WASD movement → walk_fwd_lower + walk_upper animation pair (speed = 0.45x)
• Idle state → idle + idle_lower animations
• Camera-chase via lib-core.camera target-provider
• Sprite-tilemap via lib-core.maps

Interactions

• WASD active → legs swing in walk direction; body slowly rotates to mouse; head snaps to mouse
• WASD released → idle_lower collapses legs (scl=0); upper body returns to idle sway
• Mouse moved → body lazy-rotates via slerp (look_at_slerp: 6); head snaps within ±60° of body
• Walking east while body faces north → legs perpendicular to body, hips body-relative, feet face north

CI Hooks

• SPOREL_CI=1 → 60-frame perf canary. Emits vagrant: frame_avg_ms=N and vagrant: render_frame_ok (per-frame, from render hook), then exits. Used by smoke stages P0-S25a + P0-S25b.
• SPOREL_VAGRANT_PHASE1_DRIVE=1 → scripted synthetic WASD (frames 20-40 move east). Used by P0-S25 puppet-test integration.

References

• superpowers/specs/2026-05-18-puppet-subterrain-model-design.md (design basis)
• docs/adrs/0040-puppet-subterrain-model-pivot.md (architectural rationale)
• architecture/puppet.md (lib-core.puppet reference)
• audit/2026-05-18-puppet-subterrain-model-manual-test.md (manual verification checklist)
• ADR-0028 (Launcher-Flow)
• ADR-0036 (Lib-Override for multi-module reuse)
• ADR-0037 (Tests-as-Libs)
• ADR-0038 (API-Doc-Convention)

CHANGELOG

v0.4.3

• inherit_scale: false on foot_l, foot_r: feet no longer Y-flip when leg.scl_y inverts during walk cycle. foot.rest.scl reset to [1,1].
• foot procedural callback writes foot.rot to cancel leg.rot → foot.world.rot = body.world.rot.

v0.4.2

• Procedural orientation callback writes leg.rot + foot.rot (per-channel guard allows this alongside walk_fwd_lower which writes only leg.scl).

v0.4.1

• head look-at uses target_local normalization (-π, π]) to fix flick at body south-facing.

v0.4.0

• Multi-look-target: body tracks "soft", head tracks "aim" (both currently raw mouse).
• body.look_at_slerp = 6 (lazy rotation); head instant-snap with rot_min/max ±60°.
• Legs re-parented from root to body (hip-static body-relative positioning).
• Procedural "leg_foot_orientation" callback: leg faces walk direction, foot cancels leg rotation to stay body-aligned.
• walk_fwd_lower plays at speed = 0.45x for human-feel cadence.
• Rendering wrapped in camera.begin()/camera.finish() block.

v0.3.3

• sprite_rot applied to leg bones to compensate for sprite natural orientation.

v0.3.2

• Persistent look_at_state; fixes rate-limit reset each frame.

v0.3.1

• look-at atan math corrected: atan(dx, -dy) for sprite-top convention.

v0.3.0

• Sprite-mode rendering: 13-bone humanoid puppet with multi-channel animation.
• walk_fwd_lower (lower track): leg.scl_y cycle +1/0/-1 (substrate walk_fwd_lower).
• walk_upper (upper track): arm-swing animation.
• idle + idle_lower: upper body sway + leg collapse.
• Sprite-tilemap with 4 floor variants; hardcoded furniture.

v0.2.0

• Sprite-mode rendering throughout: 13-bone humanoid puppet via lib-core.puppet v0.2 with PROTOTYPE asset-pack textures; sprite-tilemap via lib-core.maps v0.1.2 with 4 floor variants; hardcoded furniture (bed, bench, backpack).