hugpy_core
hugpy's central interface: console API, auth, planner (verdicts per model x worker),
the DB relay, the arms (video, oracle, help) and, today, the call router.
Service on ae: 7002_hugpy_api (port 7002, user solcatcher). Its DB is
hugpy_core; each box's front door writes hugpy_wrapper.call_log.
Design record: toolserver instructions/hugpy/design/call-flow-router-2026-10-06.
How a call flows (today)
client
|
v
CORE :7002 (interface + router in one process)
| 1. logs its own call row (hop core)
| 2. picks a worker: a box where the model is loaded (residents table),
| else the best-ranked box for the pair's verdict
v
WORKER AGENT (hugpy_worker, one per box)
| 3. logs its row (hop worker)
| 4. model not on this box? pull it from central INSIDE the call
| -> its own row (hop central-pull) = the cold-load measurement
v
WRAPPER FRONT DOOR (fitevict, :7016 on ae; owns the GPU)
| 5. logs its row (hop wrapper)
| 6. place: same contract loaded? reuse. else evict-to-fit + load
| (llama-server or a task child, localhost-only ports)
v
ENGINE (llama-server / task child)
| 7. serves
^
back up the same path; each hop closes its own row.
binaries in and out -> content-addressed blob store, rows keep pointers.
A refusal (won't fit, pull failed, load failed) returns up the path as data. Nothing re-routes it to another box today.
Where it is going (operator direction 2026-10-06)
client
|
v
ROUTER (own package/process; behind core's address, so callers see one address)
| a. reads the residents view (derived from call_log the moment a row changes)
| and the static verdicts. Nothing else.
| b. model loaded on a box with matching settings?
| -> proxy straight to that box's FRONT DOOR (skip the worker agent)
| c. not loaded anywhere?
| -> pick a box whose verdict says it can run
| -> that box's worker agent pulls if missing (cold load measured)
| d. static verdict says impossible on that box?
| -> refuse here: one row, reason + verdict pointer, try the next box
| e. the box refuses (live room, load failure)?
| -> bounce back: try the next box, one row per decision
v
WRAPPER FRONT DOOR (thin when the model is loaded: reuse, forward, measure, log)
v
ENGINE
CORE (interface: console, auth, planner/verdicts, arms, help) - not on the hot path
Rules behind it:
- One row per decision, written by the hop that made it. Core never forwards a call it knows is impossible just to have it logged further down.
- A model missing from a box is not a refusal: the pull happens inside the call and is the cold-load measurement.
- With no core/router in front, the wrapper is first: it serves or refuses (the reason as data). Bounce-back is the job of whatever router/core is in front.
- A changed pair setting on a loaded model evicts and reloads it when idle.
Benchmark call-log history
POST /llm/benchmark/run opens a core call-log row before validation or planning.
Accepted runs keep that row pending until their asynchronous outcome is known.
Rejected plans retain their constraint reasons in the core response and error.
The response and X-Hugpy-Request-Id expose its request ID.
Benchmark history/status read call_log; the JSON state and run archives are no
longer read or written. Existing files are left intact as legacy evidence and
are not converted into invented historical call records. Grading entries store
call pointers and verdicts. History resolves answers and measurements from the
referenced execution records. Each benchmark inference core row points back to
the orchestration row, and its execution pointer identifies the wrapper row.
Pending benchmark rows from a previous core process are marked interrupted.
The brain (failure auto-evaluation)
Ruling: toolserver instructions/hugpy/brain/brain-established-2026-10-06.
A brain lives in core: always present, callable, and it evaluates every
model-load failure automatically. hugpy-agent, when installed, adds features and
access on top (the agent-station TUI); without it, this brain does the work.
- Event: a
hugpy_wrapper.residentsrow whoseload_errorchanges firespg_notify('model_rows');brain.ensure()(started byapp.main) listens and evaluates it. No polling. - Classify: rules first, from the legacy taxonomy (
hard_load_failure,vram_fit,engine_unavailable,unreachable,vision_needs_slot,missing_dependency,other), plus pip-shaped signals (pip install X,No module named 'x', transformers' "requires the following packages"). - Infer: the brain model is asked only when the rules leave something open
(class
other, or an import name with no package name, e.g.cv2→opencv-python). The call goes through core's own/v1/chat/completionswithmetadata.intent = "brain-evaluate", so it is acall_logrow. The brain never overrules a class the rules determined. - Record: every evaluation is a Help ticket (
help_tickets, kindload-failure), de-duplicated per model/worker/error viaoccurrences. - Call it:
POST /llm/brain/evaluate {error, worker?, model_key?, file?};GET /llm/brainshows the model, policy and listener state.
Which model is the brain. The static hugpy-brain model group (see
Model groups below) holds the models the brain may run on, in priority
order. When the group is empty it fills itself from the grades: every model
whose latest verdicts pass the threshold in each listed grader category
(default coding 3/3 + logic 3/3 of the hugpy-native-v2 suite's
easy/medium/hard tiers), best first. Resolution: the Settings selection
(brain.model) → HUGPY_BRAIN_MODEL → the group's first servable member →
the best-graded servable model (flagged below threshold). The Help chat uses
the same brain (after HUGPY_HELP_MODEL).
Auto-implement gate. Every evaluation carries auto: {eligible, why}.
A fix may be implemented without approval only when brain.auto_fix is
ticked and it is a pip fix with named packages; a fix read literally off the
error needs nothing more, a fix a model inferred also needs that model to meet
the threshold. Otherwise it waits for operator approval.
Settings → Policies → Brain (settings_policies):
| key | meaning |
|---|---|
brain.model |
the brain's model; unset = automatic (first servable hugpy-brain member) |
brain.auto |
auto-evaluate load failures (default on) |
brain.auto_fix |
the auto-implement tick box (default on) |
brain.threshold |
{grader category: tiers that must pass}, default {"coding": 3, "logic": 3} |
Not automated yet (same ruling, next step): the venv ladder for
missing_dependency — existing env profiles → a new overlay profile → an
isolated profile — each candidate test-loaded, then designated
(model_workers.env_profile); auto decides whether that happens on its own.
Never pip-install into a shared venv.
Model groups (Priority groups panel)
model_groups.py + sql/019_model_groups.sql: the panel's groups are rows in
hugpy_core.model_groups (record shape lifted from legacy
comms/priority_groups.py: ordered members, ordered workers, enabled),
plus static (cannot be deleted or renamed), role and source
(operator | auto). GET/POST /llm/model-groups, PUT/PATCH/DELETE /llm/model-groups/<id>. One structural rule, as before: a model key may be in
at most one enabled routing group. Role groups (hugpy-brain, role brain)
never route, may be empty, and sit outside that rule. Core's request routing
does not walk priority groups yet; the list payload says so (routing: false)
and resolve answers that honestly. allocate returns 501 (not lifted).
Verdicts priced at the pair's ctx and KV type
planner.refresh_worker passes each pair's user_settings to
measured_verdict.price: the verdict is priced at the pair's ctx_pct
(k% of the trained window, floored to 1024) and kv_cache_type
(f16 / q8_0 / q4_0). A knob write that touches either re-plans that worker
at once (modeldb.pair_knobs → planner.replan), so the console's Memory
distribution follows the knobs.
The fix ladder (missing dependencies) — fix_ladder.py
Operator design: try every environment on the box that may already fit, else
the box's worker base + the new pip install, else keep that new (broken)
install attributed and leave the ticket for the operator. Candidates, best
first: BUILT profiles whose frozen lock holds every needed package, then
DECLARED-but-unbuilt ones whose manifest holds them (the box builds on the test
load). Each candidate is attributed (model_workers.env_profile) and
test-loaded (envprofiles.run_test, an env-test call, 10 min cap); a failure
is reverted, and its log tail (call_log.response_meta.load_log_tail) is read
for the next missing package (transformers' "requires the X library" wording
included). The new environment is auto-<model> (worker base + packages, up to
3 rounds). Starts on its own when the evaluation is auto-eligible, else on ✓
approve; a core restart resumes it once its worker re-registers. Progress lives
on the ticket (detail.ladder). First real fix: Qwen3.5-0.8B on computron →
its vision profile (pillow + the box-pinned torchvision).
Allocation determinations
A benchmark lane refused because the worker does not hold the model goes to
the brain (brain.constraint_and_file): on another online worker → reroute;
in central's catalog → pull (ACTIVATE, automatic when the gate allows, else
"✓ pull" on the allocation ticket); nowhere → not available.
Grader tok/s
/llm/model-metrics2 rows carry a throughput block per worker × quant ×
alloc and /llm/models/<m>/metrics carries worker_averages (Σ tokens /
Σ generation seconds over every recorded call), both from the call log. The
Grader tab showed "no calls recorded" everywhere because the rows had only a
bare tok/s number and worker_averages was a fixed [].
1 maintainer
Metadata
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