V1 Web PWA · Surface walkthrough

Studio Hathor · Simulation Physics

A per-surface walkthrough of the V1 Web PWA studio surface: layout, states, interactions, data, and cross-references.

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Context. surface studio · domain hathor · route /studio/hathor/simulation-physics · auth signed-in + studio entitlement · source apps/oshun/web/src/app/studio/hathor/simulation-physics/page.tsx

Last walked. 2026-05-29 automated runtime walk (Playwright headless) — render, /v1 data (2xx), console/page-errors, expected content, screenshot verified; live screen-reader, touch, offline, and telemetry-delivery checks pending a manual AT pass. Evidence: WALKTHROUGH/results/runtime-sweep-2026-05-29.md; body re-derived 2026-06-03 from current source (lane-console architecture)

Purpose#

Admin lane console for the physics sibling under the Hathor simulation cluster: a deterministic point-mass integrator. The operator picks a gravity preset, sets mass and step count, and the lane runs the real solver and returns the integrated trajectory (position, velocity, speed per step). It is a sibling lane under the canonical /studio/hathor/simulation aggregator.

Entry points#

  • Quick-action link from /studio/hathor/simulation — "Open Hathor Simulation Physics workspace"
  • Quick-action link from /studio/hathor/npc-behavior-trees (verify against that page's source)
  • Direct URL / bookmark — yes; alternates.canonical set to /studio/hathor/simulation-physics
  • Studio overview — see ../../studio-overview.md

Layout regions#

page.tsx renders inside <ShellLayout active="studio">:

  • Breadcrumb panel (data-hathor-simulation-physics-breadcrumbs) — <nav> ol: Studio / Hathor / Simulation (link) / Simulation Physics (sibling lane)
  • Workspace <StudioHathorSimulationPhysicsWorkspace /> (data-hathor-simulation-physics-workspace):
    • WorkspaceHeading <h1> — "Hathor Simulation Physics Workspace"
    • Summary <p data-hathor-simulation-physics-summary>
    • The simulation form lane (loading / unauthorized / error / form / result)
  • Route Map panel data-hathor-simulation-physics-route-map — <h2> "Hathor Simulation cluster — IA contract"; a role-tagged list built from STUDIO_HATHOR_SIMULATION_PHYSICS_ROUTE_MAP (7 entries): the parent-aggregator (/studio/hathor/simulation), self (/studio/hathor/simulation-physics), and 5 peer-lane siblings (simulation-worker, simulation-state-persistence, economy-simulation, politics-simulation, culture-evolution-simulation)
  • Quick-action lane — three Link.quickAction anchors: Back to Hathor Simulation aggregator, NPC Behavior Trees, Back to Studio workspace index

States#

  • Loading — data-hathor-simphys-loading "Loading physics engine…"
  • Unauthorized (admin-scope 401/403) — data-hathor-simphys-unauthorized "Access restricted."
  • Error — data-hathor-simphys-error "Could not load the physics engine."
  • Ready (form) — gravity select + mass/steps inputs + submit
  • Result — data-hathor-simphys-result with per-step data-hathor-simphys-field rows (data-hathor-simphys-position, data-hathor-simphys-velocity, data-hathor-simphys-speed)
  • Validation error — data-hathor-simphys-simulate-error

Interactions#

Simulation lane#

  • Gravity — <select data-hathor-simphys-gravity> populated from catalog.gravityPresets
  • Mass — <input data-hathor-simphys-mass> (aria-label "mass")
  • Steps — <input data-hathor-simphys-steps> (aria-label "steps")
  • Submit — <button data-hathor-simphys-simulate-submit> "Run simulation" → POST SIMULATE_ENDPOINT

Route Map panel#

  • Role-tagged entries — verify parent-aggregator / self / peer-lane roles against STUDIO_HATHOR_SIMULATION_PHYSICS_ROUTE_MAP (7 entries)

Quick-action lane#

  • "Back to Hathor Simulation aggregator" → /studio/hathor/simulation
  • "Open Hathor NPC Behavior Trees workspace" → /studio/hathor/npc-behavior-trees
  • "Back to Studio workspace index" → /studio

Data & contracts#

  • Reads: GET /v1/admin/hathor/simulation-physics (SP_ENDPOINT) — the physics catalog (gravity presets, defaults)
  • Writes: POST /v1/admin/hathor/simulation-physics/simulate (SIMULATE_ENDPOINT) with gravity/mass/steps
  • Realtime: none
  • Caching: client fetch on mount, cache: 'no-store', buildBffAuthHeaders()
  • Auth/role check: admin-scoped, fail-closed on 401/403; route additionally gated signed-in + studio by the BFF proxy

Cross-references#

Open questions / known gaps#

  • Hathor is unconfirmed-v1 per WALKTHROUGH/matrix/routes.csv. Confirm whether the dedicated /studio/hathor/ lane consoles ship at V1 or are internal-only.