docs(arch): close Phase 4 of refactor roadmap#339
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…its own TU Moves Engine::init_weights (~230 LOC) from src/runtime/engine.cpp to src/runtime/engine_weight_upload.cpp. Declaration in engine.h unchanged. Body byte-identical. Phase 4 of docs/superpowers/specs/2026-05-20-architecture-refactor-roadmap-design.md Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…wn TU Moves Engine::init_kv_cache (~255 LOC) to src/runtime/engine_kv_cache_init.cpp. Declaration in engine.h unchanged. Body byte-identical. Phase 4 of docs/superpowers/specs/2026-05-20-architecture-refactor-roadmap-design.md Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Combines three small init-tail methods into one TU: - Engine::init_features (~77 LOC) - Engine::build_banned_token_list (~85 LOC) - Engine::warmup (~91 LOC) All three run during engine init after weights + KV cache are set up; colocating them keeps the init-tail logic in one file. Declarations in engine.h unchanged. Bodies byte-identical. Phase 4 of docs/superpowers/specs/2026-05-20-architecture-refactor-roadmap-design.md Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Moves 13 step/prefill/decode methods (~1250 LOC, the bulk of engine.cpp)
to src/runtime/engine_scheduler.cpp:
- step, step_async_graph_resume, step_schedule
- supports_chunked_prefill_, resolve_prefill_chunk_size_
- step_prefill, prefill_allocate_kv_blocks_,
prefill_upload_metadata_, step_prefill_one
- step_decode, decode_build_inference_state_,
step_decode_forward, step_decode_process_outputs
All declarations in engine.h unchanged. Bodies byte-identical.
This is the largest single drop in Phase 4 of the architecture refactor.
Phase 4 of docs/superpowers/specs/2026-05-20-architecture-refactor-roadmap-design.md
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…split Moves 6 decode-loop tail methods to src/runtime/engine_sampling_stop.cpp: - is_stop_token, track_think_state, should_stop (stop check) - fill_sampling_params, upload_penalties, fill_recurrent_state (per-request setup) Two related clusters colocated because they share the per-request state-passing pattern (Request& + InferenceState&) and run in the decode loop tail. This is the FINAL per-subsystem extraction of Phase 4. After this PR, engine.cpp is at ~570 LOC — well under the <=800 LOC plan target. Declarations in engine.h unchanged. Bodies byte-identical. Phase 4 of docs/superpowers/specs/2026-05-20-architecture-refactor-roadmap-design.md Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Phase 4 (Engine.cpp zerteilen) is done. PRs that landed: - #310 engine_internal.h shared helpers - #311 InitResolver (~319 LOC) - #312 WeightUploadOrchestrator (~230 LOC) - #313 KVCacheInitializer (~255 LOC) - #314 WorkspaceBuilder + Warmup + banned-tokens (~247 LOC combined) - #315 Scheduler — 13 step/prefill/decode methods (~1244 LOC biggest) - #316 Sampling + Stop helpers (~206 LOC) — final per-subsystem extraction Outcome: engine.cpp 3112 → 570 LOC façade (target ≤800, beaten by ~30 %). Plan deviated from "named class with constructor injection" to "TU-split-only" — same pattern as Phase 3. Multi-week pure-functional class redesign avoided. Promoting to named classes preserved as opportunistic future refactor. Closeout updates: 1. docs/superpowers/specs/...-roadmap-design.md — Phase 4 status with PR list + deviation note. 2. docs/architecture.md — rewrite engine.cpp wound to reflect the new 570-LOC façade + 6 per-subsystem TU layout. Phase 5 (Schichten und APIs — VRAM owner, RuntimeConfig de-globalize, Public API dedupe, 1 GiB S-matrix wound) is the FINAL phase. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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CI failure on PR #337 / v2 #337 (= #325 chain head for scheduler): syntax error at engine_scheduler.cpp:1297 due to extra '}' after the namespace-scope function closing brace. Introduced during the local rebase conflict resolution when I replaced the scheduler function bodies with HEAD versions via sed cascade. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Rebased from #317 onto current main (PR-stack cleanup; harness blocked force-push). Original content preserved below.
Summary
Phase 4 landings
Outcome
`engine.cpp`: 3112 → 570 LOC façade. Plan target ≤800 beaten by ~30% margin.
Plan deviation
Spec proposed "named class with constructor injection" per subsystem. Plan deviated to TU-split-only because methods mutate Engine private state directly; pure-functional redesign would be multi-week. Same pattern as Phase 3 for executor_pre_dequant.cu.
Deferred (soft PRs)
Stacking
Stacked on `refactor/engine-extract-sampling-stop` (PR #316). When all #310-316 merge, base resolves to main.
Test plan
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