feat(streaming): enforce typed completion queues

Replace the flat deferred list, priority scan, unload bypass, and count-only execution cap with exact destination/control/unload/Near/Far FIFOs behind one typed frame meter. Price worker results before adoption, retain exact retry identity, reject stale generations without payload retention, and publish queue pressure through lifecycle diagnostics.

Tests: dotnet build AcDream.slnx -c Release --no-restore; dotnet test AcDream.slnx -c Release --no-restore (8138 passed, 5 skipped)

docs/architecture/acdream-architecture.md

@@ -712,11 +712,16 @@ partially hydrated cell membership or shell placement to the renderer.
 update-thread streaming cost. `StreamingWorkMeter` owns the frame-scoped
 admission ledger; `LandblockStreamResultCost` assigns deterministic charges to
 immutable completion arrays and logical retained entries without claiming to
-measure CLR allocator overhead. During Slice E1 the ledger is observational:
-the existing scheduler still executes its accepted work, while lifecycle
-artifacts record would-yield limits, elapsed work, retained backlog bytes/age,
-and pending publication/retirement counts. Enforcement belongs to the explicit
-Slice E scheduler, not to presentation owners or the worker.
+measure CLR allocator overhead. `LandblockStreamer` exposes one allocation-free
+single-consumer peek/read source so the update thread prices a result before
+adopting it. `StreamingController` is the sole scheduler: it admits through the
+typed meter into reusable destination/control/unload/Near/Far FIFOs, preserves
+exact reference identity and retry position, rejects stale generations, and
+executes every class through the same meter. Priority changes order, never the
+budget. Lifecycle artifacts publish worker and per-class backlog, retained
+bytes/age, yields, oversizes, overruns, and pending publication/retirement
+facts. Publication remains transaction-atomic until Slice E4; retirement
+quiesce/cursors belong to E3.
 
 ### World-reveal readiness ownership
 

docs/plans/2026-04-11-roadmap.md

@@ -1605,8 +1605,13 @@ port in any phase — no separate listing here.
 > and dense-Arwic physical routes passed; third-visit cache residence was
 > non-growing and no checkpoint retained staged or retiring bytes. [Residency
 > report](../research/2026-07-24-slice-d-unified-residency-report.md). Slice E
-> cost-budgeted streaming/retirement is active. F/G and J retain their explicit
-> approval gates.
+> cost-budgeted streaming/retirement is active. E2 has replaced the flat
+> deferred list, count-only throttle, priority hunt, and unload bypass with one
+> typed-meter scheduler over explicit stable destination/control/unload/Near/
+> Far queues; production prices worker results before adoption and lifecycle
+> artifacts expose exact backlog/retained-byte facts. E3 next adds immediate
+> old-generation quiesce and cursored retirement. F/G and J retain their
+> explicit approval gates.
 
 **Spec:** `docs/superpowers/specs/2026-07-05-modern-pipeline-design.md` (the
 umbrella design — read it first). **Goal:** smoothness first (no frame over

docs/plans/2026-05-12-milestones.md

@@ -93,9 +93,10 @@ The separately authorized modern-runtime performance program has completed
 Slices A–D: corrected measurement, prepared-package bake/dedup, package-only
 production streaming, and typed unified residency. Its physical capped,
 uncapped, and dense connected gates pass without a visual-quality change.
-Slice E cost-budgets portal publication and retirement next. Slices F/G remain
-behind their explicit ECS approval gate, and Slice J remains behind its
-gameplay-owner approval gate.
+Slice E0–E2 now define and enforce typed completion admission through explicit
+stable priority queues; E3 adds immediate old-generation quiesce and cursored
+retirement next. Slices F/G remain behind their explicit ECS approval gate,
+and Slice J remains behind its gameplay-owner approval gate.
 
 Slice 1's 18-cell favorite-spell overflow bar is user-accepted. Slice 2's
 status hand selected-object availability and existing

docs/plans/2026-07-24-modern-runtime-slice-e-cost-budgeted-streaming.md

@@ -1,6 +1,6 @@
 # Modern Runtime Slice E — Cost-budgeted streaming and retirement
 
-**Status:** active — E0/E1 complete; E2 explicit admission queues next
+**Status:** active — E0/E1/E2 complete; E3 quiesce and budgeted retirement next
 **Program:** `docs/plans/2026-07-24-modern-runtime-architecture.md`
 **Baseline:** Slice D closeout commit `66690805`
 **Behavior contract:** no visual-quality or retail-behavior reduction
@@ -255,6 +255,30 @@ retry, stale-generation, and deferred-compaction tests remain green.
 - Keep current publication atomic until E4, but execute only work admitted by
   the typed meter.
 
+**Complete 2026-07-24.** Production now consumes the worker channel through
+one allocation-free `TryPeek`/`TryRead` source, prices the exact immutable
+result before adoption, and admits it through the typed completion-count and
+retained-CPU dimensions. Accepted work lives in reusable stable FIFOs for
+destination, control, unload, Near, and Far classes. FIFO order is exact inside
+each class, a blocked publication head does not reorder its tail, callback
+appends cannot invalidate an active receipt, and exact-reference compaction
+cannot conflate equal records or GUID/landblock reuse.
+
+`_deferredApply`, `MaxDrainIterations`, direct priority hunting, and the unload
+budget bypass are gone. Destination and unload work win queue order but consume
+the same execution meter. One indivisible publication may make progress after
+admission work, but that privilege is granted only once per frame and every
+oversize/overrun remains named. Stale generations consume a bounded admission
+without retaining their payload. The old completion-count quality setting now
+selects a complete scaled time/count/byte/operation profile rather than acting
+as a hidden second throttle.
+
+Validation: 240 focused App streaming tests and 58 focused Core streamer/
+controller tests passed; the complete App suite passed 3,656 / 3 skipped, the
+complete solution passed 8,138 / 5 skipped, and the Release solution build was
+clean. Physical connected and visual gates are intentionally deferred until
+E6; the active desktop was RDP and is not valid performance evidence.
+
 ### E3 — Quiesce and budgeted retirement
 
 - Add destination-generation world quiesce.