Make `beellama/dflash` the single-GPU default for Qwen3.6-27B, served via
an unofficial multi-arch image, and demote ik-llama to the balanced alt.
Decision basis (single-3090, 370 W; bench.sh n=5 + quality-test --full):
- Code TPS ~100 vs ik 69 — fastest single-card 3090 code path.
- 8-pack 107/150 (71%) think-off vs ik 99/150 (66%); 113/150 think-on
(same-session). DFlash is output-lossless, so quality == the Q5_K_S target.
- Context ceiling ladder (measured): 130K comfortable, 160K usable
(115K-tok prefill OK, 0.8 GB headroom), 200K boots but OOMs on prefill.
Ships 102K default; raise to 160K via CTX_SIZE.
- ik still wins narrative TPS (63), VRAM, and shipped vision — kept as the
balanced alt (`--variant ik-llama/iq4ks-mtp`).
Registry: `beellama/dflash` experimental -> caveats + a new
DEFAULTS[(qwen3.6-27b, beellama, single)] row. beellama is already #1 in
ENGINE_PREFERENCE[single], so the resolver now returns it for Qwen single.
Image: unofficial multi-arch ghcr build
`beellama-cpp:multiarch-b9459-07ac3ce` (sm_86/89/120 = RTX 3090/4090/5090),
built from Anbeeld/beellama.cpp .devops/cuda.Dockerfile with
CUDA_DOCKER_ARCH="86;89;120" + GGML_CUDA_FA_ALL_QUANTS=ON. Engine reports
`ARCHS = 860,890,1200`; cuobjdump confirms all 3 SASS. CAVEAT: sm_89/sm_120
are compiled but UNVALIDATED — only sm_86/3090 is verified on-rig.
Also bumps the gemma beellama compose to the same multi-arch image (stays
experimental — not promoted). Docs: README single-card framing,
INFERENCE_ENGINES.md, UPSTREAM.md row, BENCHMARKS.md Qwen beellama row.
Resolver guard tests flipped to the new default; full suite 38/38.
Co-authored-by: noonghunna <[email protected]>
Co-authored-by: Claude Opus 4.8 (1M context) <[email protected]>
