refact(deployer): one MainPID gate for all three LLM endpoints

frank-dragoon's health gate never checked WHO answered :7770 — the
false-green the fleet learned about on 2026-09-26 (a stray probe holding
the port satisfies a bare curl while the unit is stopped). The other two
handlers carried that check as inlined copies; all three now call
assert_unit_owns_port, and dragoon gets the protection it was missing.

The seam follows: the endpoints' text-grep deployer tests are deleted,
because tests/llm_deploy_gates.bats EXECUTES the same handlers end to end
(stub systemctl/podman/sudo/ss/curl) and asserts refusals, restarts, unit
links, the pending marker, and the MainPID hardening. GATE_PREFIX is
exported at each handler for the same reason the serve scripts export it.

tests/deploy_sandbox.bash

@@ -64,10 +64,13 @@ sandbox_setup() {
 
     # $HOME/serverAppConfigs is the checkout the handler works in: a git
     # WORKTREE of the caller's checkout, so the handler runs the EXACT files
-    # under test (the suite lives in worktrees, where uncommitted state is
-    # the norm), and it is a real git repo: the deployer refuses a revision
+    # under test, and it is a real git repo: the deployer refuses a revision
     # it cannot resolve. The handler cds into REMOTE_DIR, so every relative
     # path it uses resolves there.
+    #
+    # HEAD is committed state, so the seam asserts on what is in history —
+    # the same rule as the whole suite, and the reason an uncommitted
+    # deployer change is invisible here until it is committed.
     git -C "$repo_root" worktree add -q --detach "$HOME/serverAppConfigs" HEAD
     export REMOTE_DIR="$HOME/serverAppConfigs"
 

tests/frank_archon_unit.bats

@@ -419,36 +419,3 @@ serve_run() {
     ! grep -qE '^(TEMP|HOST|GPU_MAX_HEAP_SIZE)=' "$ENV_FILE"
     ! grep -qE '^(export )?(TEMP|HOST|GPU_MAX_HEAP_SIZE)=' "$SERVE"
 }
-
-@test "the deployer gates the image, payload and containers, then health-checks" {
-    # The deployer refuses when the image is absent from dank's rootless
-    # storage or the .rad is missing/too small — then clears stale
-    # containers (including the legacy identities), waits out the port,
-    # relinks/enables/restarts the root unit and health-gates it.
-    grep -q 'LLM_ARCHON_CONTAINER=frank-archon$' "$REMOTE_DEPLOY"
-    grep -q 'FRANK_ARCHON_IMAGE' "$REMOTE_DEPLOY"
-    grep -q 'podman image exists' "$REMOTE_DEPLOY"
-    grep -q 'FRANK_ARCHON_MODEL_FILE' "$REMOTE_DEPLOY"
-    grep -q 'FRANK_ARCHON_RAD_MIN_MIB' "$REMOTE_DEPLOY"
-    grep -q 'frank-archon-qwen' "$REMOTE_DEPLOY"
-    grep -q 'qwen-fp8' "$REMOTE_DEPLOY"
-    grep -q 'glm-probe' "$REMOTE_DEPLOY"
-    grep -q 'wait_port_free 7770' "$REMOTE_DEPLOY"
-    grep -q 'relink_unit frank-archon' "$REMOTE_DEPLOY"
-    grep -q 'systemctl enable frank-archon.service' "$REMOTE_DEPLOY"
-    grep -q 'systemctl restart frank-archon.service' "$REMOTE_DEPLOY"
-    # The health gate is a bare curl: the HTTP listener binds AFTER the
-    # full load (main.cpp — engine.start() then engine.serve()), so during
-    # load the port refuses connections and a bare curl is honest. The
-    # FreeToken-era body read ('status ok') is gone with that engine.
-    grep -q 'curl -fsS http://127.0.0.1:7770/health' "$REMOTE_DEPLOY"
-    ! grep -q '"status":"ok"' "$REMOTE_DEPLOY"
-}
-
-@test "the deployer will not report green on a stray port-holder" {
-    # The 2026-09-26 false green: a leftover probe held :7770 and satisfied
-    # the health curl while the real unit was stopped. The deploy is only
-    # green when the unit's own MainPID is live behind the health answer.
-    grep -q 'systemctl show -p MainPID --value frank-archon.service' "$REMOTE_DEPLOY"
-    grep -q 'stray process holds the port' "$REMOTE_DEPLOY"
-}

tests/frank_dragoon_unit.bats

@@ -335,11 +335,6 @@ $(cat "$TEST_TMP/serve.log")"
     grep -qF "LLM_DRAGOON_CKPT_BYTES=\"\${LLM_DRAGOON_CKPT_BYTES:-$bytes}\"" "$DEPLOYER"
 }
 
-@test "the deployer points a missing artifact at the flashnext fetch script" {
-    grep -qE 'download-frank-dragoon-flashnext\.sh' "$DEPLOYER"
-    grep -qE 'podman pull' "$DEPLOYER"
-}
-
 @test "the stray sweep cannot take frank-zealot or the deployer down" {
     # frank-zealot also listens on this host (7771, llama-server) and the
     # deployer's own command line contains "frank-dragoon"; only the FULL

tests/frank_zealot_unit.bats

@@ -269,17 +269,6 @@ run_stage() {
     [[ "$output" == *"build-llama-master-cuda.sh"* ]]
 }
 
-@test "the deploy handler gates on binary, GGUF and projector, then MainPID-hardens health" {
-    grep -q 'deploy_llm_zealot' "$REMOTE_DEPLOY"
-    grep -q 'LLM_ZEALOT_RUNTIME' "$REMOTE_DEPLOY"
-    grep -q 'LLM_ZEALOT_MODEL_FILE' "$REMOTE_DEPLOY"
-    grep -q 'LLM_ZEALOT_MMPROJ' "$REMOTE_DEPLOY"
-    grep -q 'relink_unit frank-zealot' "$REMOTE_DEPLOY"
-    grep -q 'systemctl enable frank-zealot.service' "$REMOTE_DEPLOY"
-    grep -q '127.0.0.1:7771/health' "$REMOTE_DEPLOY"
-    grep -q 'frank-zealot.service has no MainPID' "$REMOTE_DEPLOY"
-}
-
 @test "the two endpoints keep separate ports and the large handler never pkills llama-server" {
     # frank-dragoon's sweeps must not take down frank-zealot, whose
     # process is llama-server on the SAME host.

tests/llm_deploy_gates.bats

@@ -23,11 +23,14 @@ teardown() { sandbox_teardown; }
     [ "$(restarts_requested)" = "0" ]
 }
 
-@test "the dragoon handler refuses a truncated checkpoint, naming both sizes" {
+@test "the dragoon handler refuses a truncated checkpoint, pointing at the fetch" {
     truncate -s 9 "$STAGE/models/ck.hgn"
     run_handler dankclaw frank-dragoon
     [ "$status" -ne 0 ]
     [[ "$output" == *"checkpoint: is 9 bytes, expected 10"* ]]
+    # The refusal is only useful if it names the remedy: the fetch script
+    # re-verifies byte counts and hashes.
+    [[ "$output" == *"download-frank-dragoon-flashnext.sh"* ]]
     [ "$(restarts_requested)" = "0" ]
 }