rnd(M03): claim streaming target planner

Work-Package: M03-RND-STREAMING-PLANNER-001
Agent: sindo-main-codex
Tests: not run (coordination-only commit)
Fidelity: no runtime change

coordination/claims/M03-RND-STREAMING-PLANNER-001.md

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+# M03-RND-STREAMING-PLANNER-001 — Pure streaming target planner
+
+<!-- OPENWC_CLAIM:M03-RND-STREAMING-PLANNER-001:sindo-main-codex:2026-07-17 -->
+
+## Ownership
+
+- Target: M03
+- Program: RND
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m03-streaming-target-planner`
+- Lease expires UTC: 2026-07-17
+- Integrator: M03 milestone integrator
+
+## Outcome
+
+Extract runtime/editor ADT wanted/retained-set calculation and boundary prefetch
+selection from `StreamingWorldLoader` into a scene-free, deterministic
+`StreamingTargetPlanner` with typed focus input and asset-free contract tests.
+
+## Non-goals
+
+- Change load/retain radii, boundary thresholds, queue priority or LOD policy.
+- Move queue mutation, async jobs, cache ownership or GPU finalization.
+- Extract `RenderBudgetScheduler` or asset services in this package.
+- Change cache formats, renderer profiles or target milestone status.
+
+## Paths
+
+- Exclusive: `src/render/streaming/streaming_target_planner.gd`,
+  `src/render/streaming/streaming_target_policy.gd`,
+  `src/render/streaming/streaming_target_plan.gd`,
+  `src/tools/verify_streaming_target_planner.gd`,
+  `docs/modules/streaming-target-planner.md`, this claim
+- Shared/hotspots: `src/scenes/streaming/streaming_world_loader.gd`,
+  `docs/modules/world-renderer.md`, `docs/modules/README.md`, `RENDER.md`
+- Generated/ignored: `.godot`, native DLL, generated cache resources and
+  proprietary renderer corpus
+
+## Contracts and data
+
+- Input: immutable `GodotWorldPosition`, available-tile key set and immutable
+  `StreamingTargetPolicy`
+- Output: immutable `StreamingTargetPlan` with focus tile plus detached
+  wanted/retained tile-key sets
+- Tile-key representation remains the streamer's existing `<x>_<y>` internal key
+- Schema/cache/coordinate versions: unchanged
+- Consumers: `StreamingWorldLoader` runtime/editor refresh paths
+
+## Dependencies
+
+- Requires: M01 typed coordinates/focus and integrated facade package `a100ced`
+- Blocks: budget scheduler extraction and planner performance regression gate
+- External state: none; tests use synthetic tile catalogs
+
+## Verification
+
+- Commands: dedicated planner verifier, facade/focus/coordinate regressions,
+  renderer manifest/dry-run and repository gates
+- Fixtures: center, edge, corner, unavailable-tile, clamped-radius and editor cases
+- Fidelity evidence: expected tile sets are captured from current formulas; full
+  renderer dry-run retains all seven checkpoint plans
+- Performance budget: planner work remains bounded by square radii and creates no
+  Node, Resource, task, cache or RID
+
+## Documentation deliverables
+
+- Inline API docs for planner/policy/plan
+- New module specification with input/output table and data-flow diagram
+- Updated world-renderer data-flow/sequence/ownership/source map
+- Updated module registry and renderer notes
+
+## Simplicity and naming
+
+- Important names: `StreamingTargetPlanner`, `StreamingTargetPolicy`,
+  `StreamingTargetPlan`
+- Simplest approach: one pure calculator plus two immutable value objects
+- Rejected complexity: generic graph planner, priority framework, service
+  container, job ownership or duplicate available-tile catalog
+- Unavoidable complexity: boundary-prefetch cross product must preserve corner
+  behavior and existing string tile keys
+- Measured optimization evidence: no new optimization; exact extraction
+
+## Status
+
+- State: active
+- Done: claim and isolated worktree created
+- Next: implement pure contracts, migrate runtime/editor refresh, verify
+- Blocked by:
+
+## Handoff
+
+- Commit:
+- Results:
+- Remaining risks:
+- Documentation updated: