coord(M03): claim ADT water load pipeline state

coordination/claims/M03-RND-ADT-WATER-LOAD-PIPELINE-001.md

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+# M03-RND-ADT-WATER-LOAD-PIPELINE-001 — ADT water load pipeline state
+
+<!-- OPENWC_CLAIM:M03-RND-ADT-WATER-LOAD-PIPELINE-001:sindo-main-codex:2026-07-20 -->
+
+## Ownership
+
+- Target: M03
+- Program: RND
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m03-adt-water-load-pipeline`
+- Lease expires UTC: 2026-07-20
+- Integrator: M03 milestone integrator
+
+## Outcome
+
+Extract ADT water pending-request FIFO/deduplication, active worker task IDs and
+worker-safe result mailbox from the loader while preserving loader-owned parse,
+budget, stale-result and scene finalization behavior.
+
+## Non-goals
+
+- Instantiate `ADTLoader`, start/wait WorkerThreadPool tasks or parse ADT bytes.
+- Consume `WATER_FINALIZE` permits or choose concurrency/profile limits.
+- Build/attach/free water Nodes, materials, Meshes or RIDs.
+- Change tile/path stale checks, empty-data behavior or `water_loaded` timing.
+- Change MH2O/MCLQ parsing or claim liquid fidelity/performance parity.
+
+## Paths
+
+- Exclusive: `src/render/liquid/adt_water_load_pipeline_state.gd`,
+  `src/tools/verify_adt_water_load_pipeline_state.gd`,
+  `docs/modules/adt-water-load-pipeline-state.md`, this claim
+- Shared/hotspots: `src/scenes/streaming/streaming_world_loader.gd`,
+  `src/tools/verify_render_runtime_cache_shutdown.gd`,
+  `docs/modules/world-renderer.md`, `docs/modules/README.md`, `RENDER.md`,
+  `targets/03-renderer-facade.md`
+- Generated/ignored: `.godot`, native DLL, generated ADT resources, caches and
+  proprietary renderer corpus
+
+## Contracts and data
+
+- Pending requests preserve FIFO and tile-key deduplication.
+- Tile release removes all matching pending entries but does not cancel active work.
+- Active task IDs are loader-created opaque integers keyed by tile.
+- Worker publication and main-thread result pop/clear are mutex protected.
+- Result order and Dictionary payload identity remain unchanged.
+- Clear releases bookkeeping only; loader waits tasks at orderly shutdown.
+- Water parsing, coordinate, material, profile and visual rules are unchanged.
+
+## Dependencies
+
+- Requires: current master `4387c66`; accepted scheduler and renderer lifecycle
+- Blocks: further liquid parse/finalization decomposition
+- External state: none; verification uses synthetic task IDs and payloads
+
+## Verification
+
+- Commands: dedicated FIFO/dedupe/task/result/cancel/clear/thread/source/timing
+  verifier; shutdown, water/material and adjacent renderer/streaming/coordinate/
+  documentation/coordination gates
+- Fixtures: synthetic tile/path requests, task IDs and water dictionaries
+- Fidelity evidence: exact current queue/task/result transitions preserved
+- Performance budget: 100 cycles over 256 requests/results under 1 second
+
+## Documentation deliverables
+
+- Inline public API docs
+- Module specification with inputs/outputs, ownership and source map
+- Data-flow, lifecycle/state, worker sequence and dependency diagrams
+- World-renderer, module registry and RENDER status updates
+
+## Simplicity and naming
+
+- Important names introduced: `AdtWaterLoadPipelineState`
+- Simplest considered solution: one RefCounted with FIFO/dedupe/task maps and one mutex mailbox
+- Rejected complexity/abstractions: generic async scheduler, signals, callbacks,
+  WorkerThreadPool wrapper, parser/material ownership or multi-lane framework
+- Unavoidable complexity and justification: result mailbox crosses worker/main threads
+- Measured optimization evidence: bounded synthetic lifecycle loop
+
+## Status
+
+- State: claimed
+- Done: all five loader-owned water pipeline collections and lifecycle sites identified
+- Next: implement state holder, migrate loader adapters, verify and document
+- Blocked by:
+
+## Handoff
+
+- Commit:
+- Results:
+- Remaining risks:
+- Documentation updated: