initial: actor v0.1.0 — composition-wrapper + movement-speed-contract

Phase-A.5 implementation per
sporel-meta/docs/superpowers/specs/2026-06-09-phase-A-...
Re-Entry from P.0-Actor-Deferral (Trigger 1: Composition-Aktivierung).

Slim wrapper: actor.create validates properties.movement_speed > 0,
delegates to composition.create. actor.position reads dotted position
back as two numbers. actor.move does direct inert-write to position.x
+ position.y (engine §11 inert-write; Action-routing deferred).

DEFERRED in v0.1: Body-Slot-Aggregator, Walk-Capability, Movement-State
on entity, Action-mediated move. All have re-entry-trigger notes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

LICENSE

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+Copyright (c) 2026 Calic. All rights reserved.
+
+This software is part of the Sporel platform — **Tier 1 (Official /
+Proprietary)** content per the Three-Tier Licensing Model documented in
+`meta/docs/archive/design/vision.md §Licensing Model` (current source;
+migration to `meta/docs/architecture/licensing-model.md` pending).
+
+⚠ **WIP — Legal review required before public launch.**  The terms below
+reflect design intent only; the formalized license framework will be
+finalized through legal counsel before the first public release. Until
+then, this notice serves as a placeholder defending the platform owner's
+rights against unintentional re-licensing.
+
+No license is granted to copy, modify, distribute, sublicense, or otherwise
+use this software in any form without prior written permission from the
+copyright holder.
+
+References:
+- Tier 1 (this file): all rights reserved, proprietary, sold/distributed
+  via official channels (Steam, etc.)
+- Tier 2 (Semi-Commercial Co-Development): bilateral contracts, revenue-
+  share — see vision.md §Licensing Model
+- Tier 3 (Community Content): CC BY-NC-SA 4.0 + asymmetric CLA — applies
+  to community-uploaded libs/modules/assets, not this repo

README.md

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+# lib-core.actor
+
+Thin wrapper over `lib-core.composition` that enforces a baseline-speed
+contract for "actor" entities. Provides convenience helpers for
+position-read + position-write (inert-mediated). Doesn't track any
+ephemeral movement-state (vel/dir) — that stays in `player_control`
+or whatever drives the actor each frame.
+
+**Version:** 0.1.0
+**Lib-ID:** lib-core.actor
+**Requires:** lib-core.composition v>=0.1.0
+**Tags:** actor, entity, movement
+
+## Topology
+
+<!-- topology:start (auto-generated; do not edit) -->
+```mermaid
+graph LR
+  this["lib-core.actor"]
+  lib_core_composition["lib-core.composition"]
+  this --> lib_core_composition
+  engine["engine.*"]
+  this --> engine
+```
+<!-- topology:end -->
+
+## Scope (v0.1.0 — Spine)
+
+Re-Entry from P.0-Actor-Deferral (Trigger 1: Composition-Aktivierung).
+v0.1 is a minimal slice; intentional non-goals:
+
+- **No Body-Slot-Aggregator.** Phase D / J trigger.
+- **No Walk-Capability** (per ADR-0002 capabilities-as-derived).
+  Waits for a second actor-consumer that needs capability-routing.
+- **No Movement-State on the entity.** vel / dir / direction-flags are
+  ephemeral; kept in `player_control` (or whatever driver). Persisted
+  ones come with a re-entry-trigger.
+- **No Action-mediated move.** v0.1 uses engine-§11 inert-write directly.
+  Action-routing is the "right" path for game-state-weighty mutations
+  but waits until a "move" Action is registered and event/effect
+  routing matters.
+
+## API
+
+### `actor.create(spec)`
+
+**Syntax:** `actor.create({template: string, properties: table}) -> entity`
+
+**Example:**
+```lua
+-- Caller defines a template via composition first:
+composition.define_template{
+    id = "player",
+    properties = {
+        position       = {x = 0, y = 0},
+        movement_speed = 200,
+        sprite_color   = engine.render.rgb(200, 60, 80),
+        sprite_w       = 24,
+        sprite_h       = 24,
+    },
+    tags = {"renderable", "player"},
+}
+
+-- Then actor.create instantiates:
+local p = actor.create{
+    template = "player",
+    properties = {
+        position       = {x = 400, y = 300},
+        movement_speed = 200,
+    },
+}
+```
+
+**Description:** Validates that `properties.movement_speed` is a
+positive number, then delegates to `composition.create`. Loud-Error
+if `movement_speed` is missing, non-number, or non-positive.
+
+The caller is responsible for `composition.define_template{id=...}`
+before invoking. Actor doesn't auto-define templates.
+
+### `actor.position(handle)`
+
+**Syntax:** `actor.position(handle) -> x, y`
+
+**Description:** Returns the actor's current position as two numbers
+(x, y). Reads via `entity:get_property("position.x"/"position.y")`.
+Loud-Error if `handle` is nil.
+
+### `actor.move(handle, dx, dy)`
+
+**Syntax:** `actor.move(handle, dx: number, dy: number) -> void`
+
+**Example:**
+```lua
+-- Typical caller (player_control update-loop):
+local speed = actor.movement_speed(player)
+local move_dx, move_dy = compute_input_direction()
+actor.move(player, move_dx * speed * dt, move_dy * speed * dt)
+```
+
+**Description:** Adds (dx, dy) to the actor's current position via
+direct inert-write. Caller does dt-scaling and any speed-multiplication
+upstream. v0.1 uses engine §11 inert-write — Action-routing is a future
+re-entry trigger (see Scope above).
+
+### `actor.movement_speed(handle)`
+
+**Syntax:** `actor.movement_speed(handle) -> number`
+
+**Description:** Convenience read of the actor's `movement_speed`
+property (in pixels/sec by convention; caller decides the unit).
+
+## Conventions
+
+- **Position-Format**: composite-table at authoring-time
+  (`properties = { position = {x, y} }`), flattened by composition to
+  scalar properties `position.x` and `position.y`. See Phase-A Spec §5
+  A-Q5 revision (2026-06-09).
+- **movement_speed**: pixels per second. dt-scaling applied at the
+  caller, NOT by `actor.move`.
+
+## References
+
+- Spec: `meta/docs/superpowers/specs/2026-06-09-phase-A-inactive-entities-composition-actor-reentry-design.md`
+- Origin: `meta/docs/superpowers/specs/2026-05-10-p0-actor-deferral.md`
+  (Trigger 1: Composition-Aktivierung)
+- Architecture: `meta/docs/architecture/composition-model.md` (Actor as
+  Item-with-Body-Slot in Phase D; v0.1 is composition-only wrapper)
+- ADR-0001 (engine knows verbs, libs bring nouns)
+- ADR-0002 (capabilities as derived properties — Walk-Capability deferred)
+- ADR-0010 (read/write asymmetry — v0.1 inert-write escape hatch)
+- ADR-0038 (API-Doc-Convention)

init.lua

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+-- =====================================================================
+-- lib-core.actor v0.1.0 — Position + Movement-Speed wrapper over composition
+-- See: meta/docs/superpowers/specs/2026-06-09-phase-A-inactive-entities-...
+--
+-- v0.1.0 Spine-Cut:
+--   - actor.create(spec) — validates 'properties.movement_speed' is set
+--     (positive number) then delegates to composition.create. Caller is
+--     responsible for composition.define_template{id=<template>, ...}
+--     before invoking; actor doesn't auto-define templates.
+--   - actor.position(handle) -> x, y — convenience read for the
+--     dotted position-properties.
+--   - actor.move(handle, dx, dy) — direct inert-write to position.x /
+--     position.y. dt-scaling is the caller's job (typically
+--     player_control multiplies dx/dy by movement_speed * dt before
+--     calling).
+--
+-- DEFERRED (no consumer yet — wait for re-entry trigger):
+--   - Body-Slot-Aggregator         → Phase D / J trigger
+--   - Walk-Capability (per ADR-0002)→ second-actor-consumer trigger
+--   - Movement-State on the entity → kept ephemeral in player_control
+--   - Action-mediated move          → when "move" Action exists and
+--                                     event/effect routing matters
+--                                     (engine-primitives §11 inert-write
+--                                     is the v0.1 escape hatch)
+-- =====================================================================
+
+local composition = require("lib-core.composition")
+
+local M = {}
+
+function M.create(spec)
+    if type(spec) ~= "table" then
+        error("actor.create: expected table, got " .. type(spec))
+    end
+    if type(spec.properties) ~= "table" then
+        error("actor.create: 'properties' table is required " ..
+              "(must contain at least 'movement_speed' and 'position')")
+    end
+    local ms = spec.properties.movement_speed
+    if type(ms) ~= "number" or ms <= 0 then
+        error("actor.create: 'properties.movement_speed' must be a positive " ..
+              "number (got " .. tostring(ms) .. "); actors need a baseline " ..
+              "speed; callers typically apply dt-scaling before actor.move")
+    end
+    -- composition.create handles position-flattening + template-lookup
+    -- + tag-index registration. We don't add anything else here in v0.1;
+    -- this wrapper exists primarily to enforce the movement_speed
+    -- contract and to mark the entity as an "actor" semantically for
+    -- future Phase-D extensions.
+    return composition.create(spec)
+end
+
+function M.position(handle)
+    if handle == nil then
+        error("actor.position: handle must not be nil")
+    end
+    local x = handle:get_property("position.x")
+    local y = handle:get_property("position.y")
+    return x, y
+end
+
+-- Direct inert-write to position.x / position.y. Use composition's already-
+-- declared inert properties; no Action-routing in v0.1 (see DEFERRED note).
+function M.move(handle, dx, dy)
+    if handle == nil then
+        error("actor.move: handle must not be nil")
+    end
+    if type(dx) ~= "number" or type(dy) ~= "number" then
+        error("actor.move: dx and dy must be numbers")
+    end
+    local x = handle:get_property("position.x")
+    local y = handle:get_property("position.y")
+    handle:set_property("position.x", x + dx)
+    handle:set_property("position.y", y + dy)
+end
+
+-- Convenience: read the actor's movement_speed property (in pixels/sec
+-- by convention; caller decides what "pixel" means).
+function M.movement_speed(handle)
+    if handle == nil then
+        error("actor.movement_speed: handle must not be nil")
+    end
+    return handle:get_property("movement_speed")
+end
+
+return M

manifest.lib

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+{"id":"lib-core.actor","version":"0.1.0","api_min":"0.1","deps":[{"id":"lib-core.composition","version":"0.1.0"}]}