serverAppConfigs/tests/frank_medium_unit.bats

#!/usr/bin/env bats
# Seam: the frank-medium mainline-llama.cpp root unit on dankserver.
# frank-medium became a native llama.cpp service on 2026-09-16, replacing the
# vllm-radiance replica pair + routing proxy that served this endpoint for a
# day. What this seam pins is what the flags alone do not say: boot persistence
# for a NATIVE runtime (no generated quadlet is involved), that BOTH cards work
# on ONE model through a layer split with no collective in the path, that the
# DFlash2 drafter is wired with a depth its block size actually allows, that the
# runtime and payload are pinned rather than floated, and that one slot's KV
# still fits a 32 GiB card beside the weights it holds.

load helpers

UNIT="$REPO_ROOT/scripts/frank-medium.service"
SERVE="$REPO_ROOT/scripts/serve-frank-medium.sh"
ENV_FILE="$REPO_ROOT/scripts/frank-medium.env"
BUILD="$REPO_ROOT/scripts/build-llama-rdna4.sh"
FETCH="$REPO_ROOT/scripts/download-frank-medium-gguf.sh"
REMOTE_DEPLOY="$REPO_ROOT/scripts/deploy-remote.sh"

# Measured constants (rocm-smi / HF blob sizes), used by the fit arithmetic.
CARD_BYTES=34208743424      # one R9700 as rocm-smi reports it
MODEL_BYTES=31457990112     # UD-Q8_K_XL target
DRAFT_BYTES=2056414816      # DFlash2 Q8_0 drafter

@test "frank-medium's unit, serve script, env and its build/fetch scripts exist" {
    [ -f "$UNIT" ]
    [ -f "$SERVE" ]
    [ -f "$ENV_FILE" ]
    [ -f "$BUILD" ]
    [ -f "$FETCH" ]
}

@test "frank-medium is boot-persistent, self-healing and unprivileged" {
    grep -q '^WantedBy=multi-user.target$' "$UNIT"
    grep -q '^Restart=on-failure$' "$UNIT"
    grep -q '^RestartSec=' "$UNIT"
    grep -q '^User=dank$' "$UNIT"
    grep -q '^LimitMEMLOCK=infinity$' "$UNIT"
}

@test "frank-medium runs the repo's own serve script with the repo's env" {
    grep -q '^ExecStart=/home/dank/serverAppConfigs/scripts/serve-frank-medium.sh$' "$UNIT"
    grep -q 'FRANK_MEDIUM_ENV_FILE=/home/dank/serverAppConfigs/scripts/frank-medium.env' "$UNIT"
}

@test "both R9700s serve ONE model, layer-split inside one process" {
    grep -q '^SPLIT_MODE=layer$' "$ENV_FILE"
    grep -q '^DEVICES=ROCm0,ROCm1$' "$ENV_FILE"
    # The split is a layer PAIR: the shares add up to the model's 65 blocks (one
    # -ts unit per layer) and ROCm1 -- the card that also carries the drafter and
    # the output layers -- takes the FEWER of the two.  WHICH pair balances the
    # cards is the seam test's job, which recomputes it from this file; pinning a
    # literal here would only mean that re-measuring the balance breaks a test
    # about parallelism.
    local split_hi split_lo
    split_hi="$(sed -nE 's/^TENSOR_SPLIT=([0-9]+),([0-9]+)$/\1/p' "$ENV_FILE")"
    split_lo="$(sed -nE 's/^TENSOR_SPLIT=([0-9]+),([0-9]+)$/\2/p' "$ENV_FILE")"
    [ -n "$split_hi" ] && [ -n "$split_lo" ]
    [ $(( split_hi + split_lo )) -eq 65 ]
    [ "$split_lo" -lt "$split_hi" ]
    grep -q -- '--split-mode "$SPLIT_MODE"' "$SERVE"
    grep -q -- '--device "$DEVICES"' "$SERVE"
    grep -q -- '--tensor-split "$TENSOR_SPLIT"' "$SERVE"
    # Tensor split is the one shape this host cannot run: it needs a cross-card
    # collective, and the second card cannot dispatch one (see the env file).
    ! grep -q '^SPLIT_MODE=tensor$' "$ENV_FILE"
}

@test "the iGPU is hidden so no layer can land on system RAM" {
    grep -q '^HIP_VISIBLE_DEVICES=0,1$' "$ENV_FILE"
    grep -q '^export HIP_VISIBLE_DEVICES$' "$SERVE"
}

@test "the drafter runs in a chain with the draftless n-gram matcher" {
    # The chain is the measured winner (see the runbook's A/B): free where the
    # matcher cannot match, ~2.6x the drafter alone on prompt-echo traffic. A
    # bare `draft-dflash` here would silently give that up.
    grep -qE '^SPEC_TYPE=draft-dflash,ngram-mod$' "$ENV_FILE"
    grep -q '^DRAFT_MODEL_FILE=Qwen3\.8-27B-DFlash2-Q8_0\.gguf$' "$ENV_FILE"
    grep -q -- '--spec-type "$SPEC_TYPE"' "$SERVE"
    grep -q -- '--spec-draft-model "$DRAFT_MODEL"' "$SERVE"
    # ngram-mod's own window -- and only when the type asks for it, so a pure
    # DFlash or MTP configuration is not quietly handed n-gram parameters.
    grep -q '^SPEC_NGRAM_N_MATCH=24$' "$ENV_FILE"
    grep -q '^SPEC_NGRAM_N_MIN=48$' "$ENV_FILE"
    grep -q '^SPEC_NGRAM_N_MAX=64$' "$ENV_FILE"
    grep -q -- '--spec-ngram-mod-n-match "$SPEC_NGRAM_N_MATCH"' "$SERVE"
    grep -q -- '--spec-ngram-mod-n-min "$SPEC_NGRAM_N_MIN"' "$SERVE"
    grep -q -- '--spec-ngram-mod-n-max "$SPEC_NGRAM_N_MAX"' "$SERVE"
    python3 -c "
lines = open('$SERVE').read().splitlines()
guard = next(i for i, l in enumerate(lines) if '*ngram*' in l)
indent = len(lines[guard]) - len(lines[guard].lstrip())
end = next(i for i in range(guard + 1, len(lines))
           if lines[i].strip() == 'fi' and len(lines[i]) - len(lines[i].lstrip()) == indent)
assert '--spec-ngram-mod-n-match' in chr(10).join(lines[guard:end]), 'ngram flags must sit in the ngram branch'
"
    # DFlash2 drafts into a block of 8, so at most 7 draft tokens per
    # verification step -- llama.cpp asserts n_max <= block_size - 1.
    local n_max
    n_max="$(sed -nE 's/^SPEC_DRAFT_N_MAX=([0-9]+)$/\1/p' "$ENV_FILE")"
    [ -n "$n_max" ] && [ "$n_max" -ge 1 ] && [ "$n_max" -le 7 ]
}

@test "a draft MODEL is passed only for DFlash types, never for MTP" {
    # MTP builds its context against the TARGET model (its head lives in that
    # GGUF). Passing --spec-draft-model alongside it points the draft context at
    # the drafter's file, which has no MTP layers, and the server dies at load:
    #   context type MTP requested but model doesn't contain MTP layers
    #   failed to create MTP context
    # So the flag must appear exactly once, inside the dflash branch.
    python3 -c "
lines = open('$SERVE').read().splitlines()
guard = next(i for i, l in enumerate(lines) if '*dflash*' in l)
indent = len(lines[guard]) - len(lines[guard].lstrip())
end = next(i for i in range(guard + 1, len(lines))
           if lines[i].strip() == 'fi' and len(lines[i]) - len(lines[i].lstrip()) == indent)
block = chr(10).join(lines[guard:end])
assert '--spec-draft-model' in block, 'the dflash branch must pass the draft model'
assert sum(l.count('--spec-draft-model') for l in lines) == 1, 'only that branch may pass it'
print('draft-model wiring ok')
"
}

@test "the runtime is pinned to a commit and to gfx1201 alone" {
    # A floating ref would silently move the service between engine versions,
    # and an unpinned arch would build for a sibling GPU that loads and then
    # segfaults on these cards.
    grep -Eq '^LLAMA_REF="\$\{LLAMA_REF:-[0-9a-f]{40}\}"$' "$BUILD"
    grep -Eq '^HIP_ARCH="\$\{HIP_ARCH:-gfx1201\}"$' "$BUILD"
    grep -q 'GGML_HIP=ON' "$BUILD"
    grep -q 'frank-medium.env' "$SERVE"
}

@test "the payload is fetched resumably and verified by size" {
    grep -q 'UD-Q8_K_XL\.gguf' "$FETCH"
    grep -q 'Qwen3\.8-27B-DFlash2-Q8_0\.gguf' "$FETCH"
    grep -q 'curl -fL -C -' "$FETCH"
    grep -q 'verifying sizes' "$FETCH"
}

@test "both cards stay balanced and keep the operator's 1.5 GiB floor" {
    local ctx parallel cache_k cache_v split_hi split_lo batch ubatch
    ctx="$(sed -nE 's/^CTX_SIZE=([0-9]+)$/\1/p' "$ENV_FILE")"
    parallel="$(sed -nE 's/^PARALLEL=([0-9]+)$/\1/p' "$ENV_FILE")"
    cache_k="$(sed -nE 's/^CACHE_TYPE_K=(.+)$/\1/p' "$ENV_FILE")"
    cache_v="$(sed -nE 's/^CACHE_TYPE_V=(.+)$/\1/p' "$ENV_FILE")"
    split_hi="$(sed -nE 's/^TENSOR_SPLIT=([0-9]+),([0-9]+)$/\1/p' "$ENV_FILE")"
    split_lo="$(sed -nE 's/^TENSOR_SPLIT=([0-9]+),([0-9]+)$/\2/p' "$ENV_FILE")"
    batch="$(sed -nE 's/^BATCH_SIZE=([0-9]+)$/\1/p' "$ENV_FILE")"
    ubatch="$(sed -nE 's/^UBATCH_SIZE=([0-9]+)$/\1/p' "$ENV_FILE")"
    [ -n "$ctx" ] && [ -n "$parallel" ] && [ -n "$cache_k" ] && [ -n "$cache_v" ]
    [ -n "$split_hi" ] && [ -n "$split_lo" ] && [ -n "$batch" ] && [ -n "$ubatch" ]
    [ "$parallel" -ge 1 ]
    [ "$batch" -ge "$ubatch" ]
    [ "$cache_k" = "f16" ] && [ "$cache_v" = "f16" ]
    # Per card, calibrated against rocm-smi at the deployed point (35:30, ctx
    # 262144, batch 6144 x ubatch 512, two slots, DFlash2), where the two cards
    # measured 6.44 / 6.90 GiB free.  The fit reproduces that to 0.01 GiB.
    #
    #   card 0 = its share of the weights and of the KV (qwen35 spends KV on
    #            its 16 full-attention layers only: 2 (K,V) x 4 heads x 256 dim
    #            x 2 B = 64 KiB per token at f16) plus ~1.4e6 B per ubatch unit
    #            of compute buffers
    #   card 1 = the same for its own share, plus the WHOLE drafter: its weights
    #            (2.06e9 B), its KV -- BOUNDED BY ITS SLIDING WINDOW, so
    #            20480 B/pos x 2048 positions rather than the context -- and
    #            ~2.5e6 B per ubatch unit of buffers on top of a ~0.89 GiB
    #            constant.  Its buffers are the heavier ones because it holds the
    #            output layers and the drafter's graphs.
    #
    # BOTH ubatch coefficients are measured at the deployed shape, from the
    # 1536 -> 512 move: 1.30 GiB on card 0 and 2.41 GiB on card 1.  That
    # asymmetry is why shrinking the batch moved the balance toward card 1 and
    # cost card 0 a layer -- the split and the batch cannot be chosen apart.
    #
    # The layer it charges for is the AVERAGE (0.70 GiB: 31.46e9 of weights plus
    # 16 GiB of KV over 65 layers).  This stack is a hybrid, so real steps vary
    # around that -- 0.43 GiB for a DeltaNet layer, 1.43 GiB for a full-attention
    # one -- which makes the drift check below CONSERVATIVE: it overstates the gap
    # a one-layer move creates, and so trips on moves a measurement might bless.
    # That is the intent: moving the split means re-measuring, not re-arguing.
    #
    # The slack is one DeltaNet layer, rounded up.  At this shape the balance
    # cannot be tuned finer than one layer, so 35:30's 0.46 GiB gap IS the
    # achievable optimum and a tighter slack would only reject it.
    #
    # What this model cannot see is CONTIGUITY -- the mechanism by which the
    # DSpark-era 8192/2048 failed, a 2020 MiB pp buffer that found no room while
    # every total looked fine.  Total bytes are not the whole story for one big
    # allocation.
    local kv_pos=65536 draft_kv_pos=20480 floor slack
    local card_hi card_lo diff
    floor=$(( 1536 * 1024 * 1024 ))     # 1.5 GiB per card
    slack=$(( 512 * 1024 * 1024 ))      # one DeltaNet layer, rounded up
    card_hi=$(( MODEL_BYTES * split_hi / (split_hi + split_lo) \
              + kv_pos * ctx * split_hi / (split_hi + split_lo) \
              + 381898377 \
              + 1363 * 1024 * ubatch ))
    card_lo=$(( MODEL_BYTES * split_lo / (split_hi + split_lo) \
              + DRAFT_BYTES \
              + kv_pos * ctx * split_lo / (split_hi + split_lo) \
              + draft_kv_pos * (ctx < 2048 ? ctx : 2048) \
              + 955046413 \
              + 2468 * 1024 * ubatch ))
    [ "$card_hi" -le $(( CARD_BYTES - floor )) ]
    [ "$card_lo" -le $(( CARD_BYTES - floor )) ]
    diff=$(( card_hi - card_lo )); [ "$diff" -ge 0 ] || diff=$(( -diff ))
    [ "$diff" -le "$slack" ]
    # ...and the window may not exceed what the checkpoint was trained for.
    [ "$ctx" -le 262144 ]
}

@test "frank-medium is text only: the vision tower stays on frank-small" {
    grep -q '^NO_MMPROJ=1$' "$ENV_FILE"
    grep -q -- '--no-mmproj' "$SERVE"
}

@test "the fleet endpoint and the predecessor's sampler defaults survive" {
    grep -q '^ALIAS=frank-medium$' "$ENV_FILE"
    grep -q '^LISTEN_PORT=7770$' "$ENV_FILE"
    grep -q -- '--alias "$ALIAS"' "$SERVE"
    grep -q -- '--port "$LISTEN_PORT"' "$SERVE"
    grep -q -- '--host "$BIND_ADDR"' "$SERVE"
    # Prometheus scrapes this endpoint for LLM fleet metrics.
    grep -q -- '--metrics' "$SERVE"
    # Requests that send no sampler fields get these instead of an error.
    grep -q '^TEMPERATURE=0.7$' "$ENV_FILE"
    grep -q '^TOP_P=0.95$' "$ENV_FILE"
}

@test "the deploy handler installs the root unit and refuses a missing payload" {
    grep -q 'deploy_llm_medium' "$REMOTE_DEPLOY"
    grep -q 'relink_unit frank-medium' "$REMOTE_DEPLOY"
    grep -q 'systemctl enable frank-medium.service' "$REMOTE_DEPLOY"
    grep -q 'systemctl restart frank-medium.service' "$REMOTE_DEPLOY"
    grep -q '127.0.0.1:7770/health' "$REMOTE_DEPLOY"
    grep -q 'build-llama-rdna4.sh' "$REMOTE_DEPLOY"
    grep -q 'download-frank-medium-gguf.sh' "$REMOTE_DEPLOY"
    grep -q '\[\[ "$missing" -eq 0 \]\] || return 1' "$REMOTE_DEPLOY"
}

@test "the deploy handler retires the vLLM quadlets and frees the port they held" {
    grep -q 'retire_vllm_medium_quadlets' "$REMOTE_DEPLOY"
    grep -q 'systemctl --user stop frank-medium-a.service frank-medium-b.service' "$REMOTE_DEPLOY"
    grep -q 'wait_port_free 7770' "$REMOTE_DEPLOY"
    # No image left to tag: the runtime is a native binary now.
    # ...and no image work or quadlet install of the predecessor survives.
    ! grep -q 'install_quadlet frank-medium-a' "$REMOTE_DEPLOY"
    ! grep -q 'podman tag docker.io/stilldeadcode' "$REMOTE_DEPLOY"
}

@test "the retired vLLM deployment is gone from the repo, not merely unmapped" {
    [ ! -d "$REPO_ROOT/dankserver/frank-medium" ]
    [ ! -f "$REPO_ROOT/tests/frank_medium_quadlet.bats" ]
    # ...and the archive is present, so the two assertions above cannot pass
    # because a path went missing rather than because it stayed missing.
    [ -f "$REPO_ROOT/dankserver/.AGENTTRASH/20260916-vllm-radiance/frank-medium-a.container" ]
    [ -f "$REPO_ROOT/dankserver/.AGENTTRASH/20260916-vllm-radiance/radiance-entrypoint.sh" ]
}

@test "the serve script refuses to start on an incomplete host" {
    grep -q 'frank-medium: missing\|missing executable runtime\|missing or unreadable' "$SERVE"
    grep -q 'missing or unreadable target model' "$SERVE"
    grep -q 'missing or unreadable draft model' "$SERVE"
}