Compose stack: ops/devops/signals/docker-compose.signals.yml (Signals API + Mongo + Valkey + artifact volume).
Sample config: ops/devops/signals/signals.yaml (mounted into the container at /app/signals.yaml if desired).
Dockerfile: ops/devops/signals/Dockerfile (multi-stage build on .NET 10 RC).
Build/export helper: scripts/signals/build.sh (saves image tar to out/signals/signals-image.tar).
Span sink stack: ops/devops/signals/docker-compose.spansink.yml + otel-spansink.yaml to collect OTLP traces (Excititor /v1/vex/observations/**) and write NDJSON to spansink-data volume. Run via scripts/signals/run-spansink.sh.
Grafana dashboard stub: ops/devops/signals/dashboards/excititor-vex-traces.json (import into Tempo-enabled Grafana).

Quick start (offline-friendly):

# build image
scripts/signals/build.sh

# run stack
COMPOSE_FILE=ops/devops/signals/docker-compose.signals.yml docker compose up -d

# hit health
curl -s http://localhost:5088/health

# run span sink collector
scripts/signals/run-spansink.sh

Configuration (ENV or YAML):

Signals__Mongo__ConnectionString default mongodb://signals-mongo:27017/signals
Signals__Cache__ConnectionString default signals-valkey:6379
Signals__Storage__RootPath default /data/artifacts
Authority disabled by default for local; enable with Signals__Authority__Enabled=true and issuer settings.

CI workflow:

.gitea/workflows/signals-ci.yml restores, builds, tests, builds container, and uploads signals-image.tar artifact.

Dependencies:

Mongo 7 (wiredTiger)
Valkey 8 (cache, BSD-3 licensed Redis fork)
Artifact volume signals_artifacts for callgraph blobs.