Hermes hardcodes response_format=json_schema on its title call. No local
back-end implements constrained decoding — frank-small and frank-large both
answer 400 'response_format json_object/json_schema is not supported' — so
every session logged a title failure and fell back to a message-derived
title. The NPU endpoint that used to absorb this call was retired on
2026-09-11.
The call now goes out over the Responses transport (the only one that does
not forward response_format) with thinking off. A 64-token cap cannot hold a
thinking pass plus a title: with the default reasoning effort the model spent
all 64 tokens thinking and returned empty content, which is why disabling
reasoning is part of the fix and not decoration.
Verified against the live endpoint with the real prompt and the real
extraction path: raw {"title": "Friendly greeting"} -> title
'Friendly greeting' in 3.4s, where the previous configuration returned 400.
frank-large moves from the kingjones30/ROCmFPX llama.cpp build to
peonist-ai/halogen-flash-server 0.5.8 serving Qwen3.8-Flash-Next (w4b
.hgn 115.55 GiB + quality overlay). Upstream measures this engine at
roughly 4x the prefill throughput of the llama.cpp family on the same
gfx1151 silicon, and prefill dominates any prompt with real context.
Shape: a rootless Quadlet container (dankclaw/frank-large/quadlet/),
engine on container loopback :8730 (never published), OpenAI front-end
:8731 published as host 7770, HALOGEN_MODEL_ID=frank-large so no client
renamed anything. Context 262144, KV pool 262144 positions (~7.2 GiB,
conservative for a shared 121 GiB host), 4 slots, host reserve 24,
vision tower on, weights pinned, all other flags at vendor defaults.
Weights are fetched by HALOGEN_DOWNLOAD on first start into a writable
/home/dank/models/halogen.
The llama.cpp era (unit, env, serve script) is staged in .AGENTTRASH/
rather than deleted; the STRIX payload and the ROCmFPX build stay on
disk as the rollback target. deploy_llm_large becomes a user-quadlet
handler: it retires the old ROOT unit (moving its checkout symlink into
the home trash, never rm) and gates the first start on the download
rather than reporting a failure for a fetch that is working exactly as
designed.
frank-npu is retired in the same change. The kernel cmdline moves from
iommu=pt to amd_iommu=off for the 13-16% of prefill upstream measured,
and that takes the XDNA2 NPU with it: without PASID/SVA the driver
cannot open /dev/accel/accel0 (err=-19). Its five dependent routes are
repointed (Hermes vision -> frank-large, Hermes title generation ->
frank-small, harness vision -> frank-large, tiny -> frank-small, task ->
frank-large:medium) and its provider blocks are removed from both the
harness config and Hermes's live config. Audio input leaves the fleet
with no replacement; image input survives on halogen's vision tower.
Docs: new halogen-flash-server runbook, new IOMMU decision record, and
frank-npu rewritten as a retirement record. AGENTS.md topology, runtime
sections, benchmarking policy (frank-large is a user unit now) and the
harness model-config section are corrected.
Live config was still routing on pre-rename aliases (frank-default-large,
frank-default-small) after the 2026-09-03 frank-large/frank-small/frank-npu
rename cutover; hermes-webui resolved those ids to nonexistent models and
requests failed. Live config fixed in place (backup kept on-host as
config.yaml.bak-20260905); this backup now mirrors the live shape: named
providers for aux routes, title_generation/triage/kanban routed to their
actual models, moa + mcp sections, signal disabled.
Mechanical identity rename across the knowledge base, AGENTS.md, README, the
hermes config example, and homepage services.json. No behavior change; served
aliases on the LLM endpoints change with the deploy of commit 69f87c8.
Frank