feat(frank-medium): swap MXFP4 -> FP8; add the one-command swap toolchain

Checkpoint: just1moremodel/Qwen3.8-27B-Uncensored-MXFP4-awq ->
orcarouter/Qwen3.8-27B-Uncensored-FP8 (FP8 E4M3 block-wise, 30.9 GB / 7
shards, its own single-layer MTP head). The quantization-aware entrypoint
serves the plain FP8 path: --quantization fp8, ROCM_AITER_UNIFIED_ATTN, MTP
self-speculation (SPEC_METHOD=mtp, SPEC=8). Measured: MTP mean accept 5.66/8
(66.2% draft acceptance), KV pool auto-sized to 461,540 tokens (1.76x),
battery 85.9 t/s decode / 0.06 s TTFT / 179.7 burst-4 (vs MXFP4 92.4/0.22/
248.9). MXFP4 checkpoint stays on disk as the rollback target.

Streamlining: scripts/hf-manifest.py (generate a <filename> <size> <sha256>
manifest from the live repo tree), scripts/hf-fetch.sh (resumable, byte +
sha256 verified, idempotent fetch), scripts/swap-frank-medium.sh (generate
manifest -> download -> detect quantization -> edit the quadlet -> deploy).

Docs: new frank-medium-model-swap runbook; radiance runbook, both indexes,
AGENTS.md, and log.md flipped to the FP8 shape.

AGENTS.md

@@ -24,7 +24,7 @@ merge absorbed the former `vllmScripts` repo, history preserved).
 
 | Target | Service | Runtime | Model | Port |
 |--------|---------|---------|-------|------|
-| Dankserver | `frank-medium` | vllm-radiance 0.9.3 (rootless Quadlet, image `localhost/radiance-vllm:0.9.3`, gfx1201) | Qwen3.8-27B-Uncensored MXFP4-awq with the z-lab DFlash2-FP8 drafter (depth 7, live mean accept length ~4.1), 2x Radeon AI PRO R9700 in ONE tensor-parallel process (TP=2 over the R4D one-shot allreduce — no RCCL collective; both cards on CPU root ports at Gen5 x8 since the 2026-09-20 ProArt B850-Creator swap), 262144 ctx over up to 8 conversations (auto-sized 943,581-token KV pool = 3.59x the window), fp8 KV, prefix caching, vision | 7770 |
+| Dankserver | `frank-medium` | vllm-radiance 0.9.3 (rootless Quadlet, image `localhost/radiance-vllm:0.9.3`, gfx1201) | orcarouter Qwen3.8-27B-Uncensored-FP8 (FP8 E4M3 block-wise, 30.9 GB / 7 shards) with MTP self-speculation (depth 8, live mean accept length 5.66/8), 2x Radeon AI PRO R9700 in ONE tensor-parallel process (TP=2 over the R4D one-shot allreduce — no RCCL collective; both cards on CPU root ports at Gen5 x8 since the 2026-09-20 ProArt B850-Creator swap), 262144 ctx over up to 8 conversations (auto-sized 461,540-token KV pool = 1.76x the window), fp8 KV, prefix caching, vision | 7770 |
 | Dankclaw | `frank-large` | CIRU v4.4.1 llama.cpp (QSA window hotfix, root systemd unit, gfx1151 HIP build) | jcbtc Qwen3.8-Flash-CIRU-STRIX-Orca on the gfx1151 iGPU (Strix Halo LPDDR), 262144 ctx single stream (1 slot), MTP depth 4, PLE 4096 MiB, text only | 7770 |
 | Dankclaw | `frank-small` | mainline llama.cpp master 37b53fd (root systemd unit) | HauhauCS Gemma4-12B-QAT-Uncensored-Balanced Q4_K_M (BF16 mmproj + MTP assistant sidecar, `draft-mtp,ngram-mod`) on the RTX 3090, 1048576 pool / 4 slots of 262,144, q8_0 KV, the fleet's fastest vision endpoint | 7771 |
 
@@ -334,18 +334,31 @@ ubatch 2048 OOMs the draft's pp buffer, and why draft depth 4 + poll
 Runbook: `serverAppConfigs-docs/LLM/frank-small-gemma4-12b.md`.
 Rollback: [[frank-small-qwen38-gsq-rco]].
 
-### frank-medium — radiance TP=2, DFlash2-FP8 drafter (Dankserver, ACTIVE)
+### frank-medium — radiance TP=2, MTP self-speculation (Dankserver, ACTIVE)
 
 vllm-radiance **0.9.3** (`localhost/radiance-vllm:0.9.3`, rootless **Quadlet**
 `dankserver/frank-medium/quadlet/frank-medium.container`) serving
-`just1moremodel/Qwen3.8-27B-Uncensored-MXFP4-awq` (MXFP4) with the
-**z-lab DFlash2 FP8 drafter** (`num_speculative_tokens: 7`, live mean accept
-~4.1) in **one tensor-parallel process across both R9700s**
+`orcarouter/Qwen3.8-27B-Uncensored-FP8` (FP8 E4M3 block-wise 128×128, dynamic
+activation quant, 30.9 GB / 7 shards) with **MTP self-speculation**
+(`num_speculative_tokens: 8`, the model's own single-layer MTP head, live mean
+accept 5.66/8) in **one tensor-parallel process across both R9700s**
 (`--tensor-parallel-size 2`). 262,144 ctx, `--max-num-seqs 8`, chunk 8192, fp8
 KV, prefix caching, GPU fill 0.98, **no KV-memory pin** — the pool auto-sized
-to 943,581 tokens (3.59× the full window). Tools via `qwen3_coder`, reasoning
-via `qwen3` (the field is `reasoning`, not llama.cpp's `reasoning_content`),
-vision through the Gemma4 merge path with `MM_MERGE_ENGINE=AXROW_SEPARATE`.
+to 461,540 tokens (1.76× the full window; smaller than the MXFP4 rollback
+target's 943,581 because the FP8 weights are bigger). Tools via `qwen3_coder`,
+reasoning via `qwen3` (the field is `reasoning`, not llama.cpp's
+`reasoning_content`), vision through the Gemma4 merge path.
+
+**The entrypoint is quantization-aware.** `radiance-entrypoint.sh` reads
+`quantization_config.quant_method` from the checkpoint's `config.json` and
+serves the plain FP8 path (no MXFP4 patches, `--quantization fp8`,
+`ROCM_AITER_UNIFIED_ATTN`, MTP self-speculation) or the MXFP4 patch-and-serve
+path (the DFlash2 external drafter). A checkpoint swap is therefore four quadlet
+env vars (`SNAP`, `SPEC_METHOD`, `SPEC`, `KV_MEM`) — the deploy handler reads
+the serving shape from the quadlet and gates on the right assets. The MXFP4
+checkpoint (`just1moremodel/Qwen3.8-27B-Uncensored-MXFP4-awq` + the z-lab
+DFlash2-FP8 drafter) remains on disk as the rollback target. Full swap
+process + toolchain: [[frank-medium-model-swap]].
 
 **TP=2 runs because the board changed.** The predecessor board (TUF GAMING
 B650-E) put card #2 behind chipset bridges advertising `AtomicOpsCap: Routing-`
@@ -365,18 +378,26 @@ vs Q8_0), so part of the margin is the quant, not the parallelism. Re-measured
 against production after deploy: 92.4 t/s, 0.22 s, 248.9.
 
 Files: `dankserver/frank-medium/quadlet/frank-medium.container`,
-`dankserver/frank-medium/radiance-entrypoint.sh`,
-`dankserver/frank-medium/frank-medium-healthcheck.py`. The llama.cpp layer-split
-trio (`scripts/frank-medium.service`, `.env`, `serve-frank-medium.sh`) is
-archived in `scripts/.AGENTTRASH/20260920-llama-layersplit/` and is the
-rollback target; `deploy-remote.sh`'s `retire_llama_medium_unit` moved the
-installed unit symlink there rather than `systemctl disable`, which would delete
-it. The deploy handler gates on the image tag, both model configs, the patch
-clone + jinja template, and `libr4d`, then waits for :7770 and gates on
-`/health`.
+`dankserver/frank-medium/radiance-entrypoint.sh` (quantization-aware),
+`dankserver/frank-medium/frank-medium-healthcheck.py`. Swap toolchain:
+`scripts/hf-manifest.py` (generate a `<filename> <size> <sha256>` manifest
+from the live repo tree), `scripts/hf-fetch.sh` (resumable, byte + sha256
+verified, idempotent fetch), `scripts/swap-frank-medium.sh` (generate
+manifest → download → detect quantization → edit the quadlet → deploy). The
+llama.cpp layer-split trio (`scripts/frank-medium.service`, `.env`,
+`serve-frank-medium.sh`) is archived in `scripts/.AGENTTRASH/
+20260920-llama-layersplit/`; `deploy-remote.sh`'s `retire_llama_medium_unit`
+moved the installed unit symlink there rather than `systemctl disable`, which
+would delete it. The deploy handler reads `SNAP`/`SPEC_METHOD` from the
+quadlet, gates on the image tag + the checkpoint's `config.json` (drafter only
+for `dflash`, `libr4d` only for `mxfp4`/`quark`), then waits for :7770 and
+gates on `/health`.
 
-Runbook: `serverAppConfigs-docs/LLM/frank-medium-radiance-mxfp4.md`.
-Rollback: [[frank-medium-llamacpp-dflash2]] (SUPERSEDED 2026-09-20).
+Runbook: `serverAppConfigs-docs/LLM/frank-medium-radiance-mxfp4.md` (serving
+details); swap process + toolchain: `serverAppConfigs-docs/LLM/
+frank-medium-model-swap.md`.
+Rollback: the MXFP4 checkpoint on disk (`SPEC_METHOD=dflash`, `SPEC=7`);
+before that, [[frank-medium-llamacpp-dflash2]] (SUPERSEDED 2026-09-20).
 
 ## Key Lessons Learned
 Durable operational lessons from the fleet's history. Full detail in the
@@ -721,7 +742,8 @@ Active:
 |---------|---------|
 | frank-large (CIRU v4.4.1 Orca, Dankclaw) | `serverAppConfigs-docs/LLM/frank-large-ciru-orca.md` |
 | frank-small (llama.cpp Gemma4-12B QAT, Dankclaw) | `serverAppConfigs-docs/LLM/frank-small-gemma4-12b.md` |
-| frank-medium (radiance TP=2 + DFlash2, Dankserver) | `serverAppConfigs-docs/LLM/frank-medium-radiance-mxfp4.md` |
+| frank-medium (radiance TP=2 + MTP, Dankserver) | `serverAppConfigs-docs/LLM/frank-medium-radiance-mxfp4.md` |
+| frank-medium model swap (toolchain + process) | `serverAppConfigs-docs/LLM/frank-medium-model-swap.md` |
 | Dankclaw kernel posture (`amd_iommu=off`) | `serverAppConfigs-docs/LLM/dankclaw-iommu-translation-off.md` |
 | Deployment flow + incidents | `serverAppConfigs-docs/LLM/deployment.md` |