The NPU path is a dead end for this payload (verdict:
report/tts-npu-spike-verdict-2026-10-19.md); the iGPU is the accelerator that
exists on this box today, and it is already shared with frank-dragoon.
- Containerfile.engine: -DGGML_VULKAN=ON, plus the three packages the door
needs to configure — libvulkan-dev, spirv-headers, and glslc, which Ubuntu's
glslang-tools does NOT ship (find_package(Vulkan COMPONENTS glslc REQUIRED)
fails without it) — and libvulkan1 + mesa-vulkan-drivers (the RADV ICD) at
runtime. No NVIDIA ICD on purpose: one Vulkan device in the enumeration is
what makes the NAME Vulkan0 safe to write down.
- tts-engine-start.sh: QWENTTS_DEVICE -> --device, default Vulkan0. A value
that is set but EMPTY passes no flag at all, which is the CPU rollback; that
is why the default is written as an -v test and not with :=, because := also
fires on an empty value and would silently undo the rollback.
- quadlet: AddDevice=/dev/dri + GroupAdd=keep-groups (a rootless container that
drops its supplementary groups enumerates no render device). The node is not
named: this host is hybrid, renderD128 is the NVIDIA card and renderD129 the
amdgpu iGPU.
- env: QWENTTS_DEVICE=Vulkan0 plus the device law in the header, including the
rollback line.
- tests: the two CPU-only assertions now assert the Vulkan shape, and a new one
pins the rollback (empty device => no --device in argv). 451/451 green.
Measured before writing any of it: the configure in the digest-pinned base
answers "Found Vulkan: ... found components: glslc" and "Including Vulkan
backend"; gate 1 (RADV GFX1151 visible to a rootless container off this base)
is recorded in the verdict report.
PR #15 corrected the engine's page, the research brief's law bullet and the
warmer's header, but the retired ladder had six more homes: both quadlet files
("6.2-8.0 s… 0.5 ms", "~6-8 s each", "paying the 5.5 s cold decode"),
`scripts/frank-tts-engine.env` (the whole law paragraph and the WARM_TEXT note),
`scripts/frank-tts.env`, the [[Frank TTS]] troubleshooting row that told an
operator to expect ~5.5 s, the research brief's consequences paragraph, and one
test comment.
All re-keyed to what was measured on the deployed container 2026-10-18: the
first synthesis of a freshly registered voice costs 1,883 ms against 1,226-1,283
ms afterwards, so the warm pass buys about 0.6 s — and the reason it exists at
all, which the pages never led with, is that the registry is memory-only: without
the hook every voice name is a 400 until somebody synthesizes. The trial's dated
worklog entry stays as written; the correction points at it.
No behavior change: comments, unit lore and docs only, so no cfhash move and no
image rebuild.
`WARM_TEXT` reaches the container **with its quotes**. The unit reads the env
file through podman's `--env-file`, which takes the literal remainder of the
line — no shell parsing — while bash `source` strips one layer. The hook
interpolated the raw value into the synthesis body, so with the quotes intact
the JSON was invalid and every voice logged "registered, but the warm synthesis
failed" while a hand-run hook (bash shape) succeeded. Reproduced both ways
against a real `podman run --env-file`, not by reading the man page.
The hook now strips exactly one matched pair — only when both ends are the same
quote AND the inner content carries another quote or a backslash, so a value
that legitimately contains quotes is never mangled — and then JSON-escapes what
is left, which is what makes a sentence like `He said "hi\" once"` arrive as
itself instead of corrupting the body.
The seam gains a test that reads `scripts/frank-tts-engine.env` BOTH ways —
`source` and the way `podman --env-file` does — and asserts the engine receives
the same sentence either way, in both shapes. A test that only sources the file
cannot see this bug, which is how it survived the first deploy.
Repo state only: nothing deployed, no host touched, no container started.
- `frank-tts-engine` on Dankclaw: `qwentts.cpp` commit
5916bf7c79dbb4e66fc059cdc507a79a23a28bb4, resident `tts-server`, 1.7 B base
talker Q4_K_M + Q8_0 tokenizer, container port 8880. It is deliberately NOT a
fleet endpoint — `frank-tts` on 7772 is the endpoint consumers address.
- Publishes NOTHING. A host-loopback publish would have been useless to the
façade (netavark DNATs published ports only, so a bridge container cannot
reach a host loopback bind — the shape that 502'd hermes) and would have been
the one LAN-reachable surface of an unauthenticated synthesiser. Both voice
containers sit on one committed quadlet network, `frank-tts-engine.network`
pinned to 10.89.5.0/24 (next free /24 after open-notebook's 10.89.4.0/24), and
peers address the engine by container name. Diagnostics and the deployer's
health gate run inside the netns (`podman exec`, `wait_container_healthy`).
- Cold-voice law honoured in the unit: the first request for a registered voice
decodes its whole reference to snapshot codec state (6.2-8.0 s, first audio
byte 5 530 ms), later ones restore in 0.5 ms, and the registry is memory-only.
`ExecStartPost=-/usr/bin/podman exec frank-tts-engine /app/warm-voices.sh`
with `TimeoutStartSec=900`; the `-` prefix keeps a failed warm from
crash-looping the endpoint under `Restart=always`. It logs cold=/warm= per
voice, so the under-a-second second request is proven on every boot.
- Thread law recorded: `tts-server` has no `--threads`; src/backend.h uses
hardware_concurrency()/2, so a cpuset pin silently changes the thread count.
- Image builds from the pinned commit with the proven line (GGML_BLAS=OFF
forced by this host, every GPU backend off, -j 8, no -DGGML_NATIVE because
ggml defaults to -march=native for the building host). Two stages; the runtime
stage COPYs both the entrypoint and the warmer, because a container that
publishes nothing is reached with `podman exec`, not a port.
- `scripts/download-frank-tts-engine-qwentts.sh` fetches the two GGUFs with byte
and LFS-oid checks (talker 1 219 245 248 B, tokenizer 291 150 624 B); the
deployer gates on --verify-only instead of pulling 1.4 GiB mid-deploy.
- Registered in SERVICE_ORDER, DANKCLAW_SERVICES, the deploy-remote.sh dispatch,
its pre-deploy requirement, deploy.sh's regex, the planner's path map (the
whole `dankclaw/voiceservice/` tree mapped to nothing before this), and
test-changed.sh ABOVE the `dankclaw/*.container` case whose `*` crosses `/`.
- New seam tests/frank_tts_engine.bats (19): the Quadlet generator's own output
for network/publish/boot/warm shape, entrypoint argv driven from the tracked
env file, the warmer against a stub tts-server over a real socket
(registration keys, ref_text absent, late engine, hung synthesis, name
refusal), the fetcher's verifier, the pinned cmake line, and both routing
tables. Suite: 422 passed.
- Vault: [[Frank TTS Engine]] linked from the index; log.md entry for the day.
Frank