Operator reported the gen seat 'cutting off'. It is not the seat. The chat
UI's max_tokens field defaults to 1024, and every thinking seat spends part
of that budget on CoT before emitting content, so the completion truncates
mid-sentence with finish_reason=length and reads as model degeneracy.
Measured through the gateway:
gen 1024 -> finish=stop, 716w (survives, but marginally)
gen-reasoning 1024 -> finish=length, cut mid-word <-- the symptom
gen-reasoning 4096 -> finish=stop, 839w
Seat itself is clean: direct long-form generations return finish=stop with
complete sentences and a max repeated 6-gram of 1 (no degeneration), and
enable_thinking:false still holds on every non-thinking alias, so the
AEON swap did not cause this.
Also documents a trap that made the fix look like it had not applied:
compose bind-mounts a single FILE, and a single-file bind mount binds the
INODE. rsync writes-and-renames, producing a new inode, so the container
kept serving the old content while the host file showed the new value --
silently, with no error. docker restart does NOT clear it; the container
must be recreated. Verify against what the container sees, never the host
file. Applies to any file-source mount; directory mounts are unaffected.
Stands up tools/gateway-chat.html as a permanent URL on ana-docker (http://10.250.50.70:8091)
via a tiny nginx:alpine static container (no GPU, no DB). conf/index.html is a deployed
mirror of tools/gateway-chat.html (re-sync one-liner in README). Homepage tile + tnet per
convention. The enhanced tool (auto-discovers /v1/models, system prompts, streaming +
reasoning, image upload for vision) is now always-on for smoking new gateway models.
vh