Demo Web Ng Fastpath

What it does

When your agent uses it

• The diff only touches elixir/web-ng/ and the user wants a faster local demo rollout without rebuilding the full image graph
• Non-web-ng services changed
• Cutting a release

Example prompts

• “/demo-web-ng-fastpath”

Requirements

• Docker
• A credential in VAULT_TOKEN

Workflow steps

10 steps, taken from the first numbered list in SKILL.md.

1. 1Work from the repo root.
2. 2Determine the new immutable tag from git rev-parse HEAD.
3. 3Verify the diff only touches elixir/web-ng/**.
4. 4Identify the currently deployed demo tag.
5. 5Copy every unchanged demo image from the old tag to the new tag.
6. 6Build a local production web-ng release.
7. 7Package and push the new serviceradar-web-ng image with crane.
8. 8Sign the new web-ng digest with the OpenBao-backed release key.
9. 9Patch serviceradar-demo-prod to the new tag.
10. 10Watch Argo and the key workloads until the rollout completes.

What it can do on your machine

Read from SKILL.md and the folder at commit 2563b3f. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • kubectl
  • git
  • curl
  • jq
  • make
  • bash

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use kubectl, git and curl, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • VAULT_TOKEN

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Demo Web Ng Fastpath loads about 2.4k tokens when it runs. Until then it costs about 139 tokens; SKILL.md has 742 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~139

When it runs · the whole SKILL.md, loaded when a task matches

~2.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from carverauto/serviceradar at commit 2563b3f, republished under its Apache-2.0 licence (© carverauto). 742 words, ~2,367 tokens.

name

demo-web-ng-fastpath

description

Refresh the Kubernetes `demo` namespace with a web-ng-only change using the ServiceRadar fast path. Use when the diff only touches `elixir/web-ng/**` and the user wants a faster local demo rollout without rebuilding the full image graph. Covers scope verification, copying unchanged images forward, rebuilding the production `serviceradar-web-ng` release locally, pushing with `crane`, signing with the OpenBao release key, patching Argo, and verifying the rollout. Do not use when non-web-ng services changed or when cutting a release.

git diff --name-only <currently-deployed-sha>..HEAD

/tmp/gobin/crane copy \
  registry.carverauto.dev/serviceradar/<image>:sha-<old> \
  registry.carverauto.dev/serviceradar/<image>:sha-<new>

MIX_ENV=prod HEX_HTTP_CONCURRENCY=1 HEX_HTTP_TIMEOUT=120 mix deps.compile
MIX_ENV=prod HEX_HTTP_CONCURRENCY=1 HEX_HTTP_TIMEOUT=120 mix compile
MIX_ENV=prod HEX_HTTP_CONCURRENCY=1 HEX_HTTP_TIMEOUT=120 mix assets.deploy
MIX_ENV=prod HEX_HTTP_CONCURRENCY=1 HEX_HTTP_TIMEOUT=120 mix release --path /tmp/serviceradar_web_ng_release_<shortsha>

tar --owner=10001 --group=10001 --transform='s,^,app/,' \
  -cf /tmp/serviceradar_web_ng_layer_<shortsha>.tar \
  -C /tmp/serviceradar_web_ng_release_<shortsha> .

/tmp/gobin/crane append \
  --platform linux/amd64 \
  -b index.docker.io/hexpm/elixir:1.19.4-erlang-28.3-debian-bookworm-20251208-slim \
  -f /tmp/serviceradar_web_ng_layer_<shortsha>.tar \
  -t registry.carverauto.dev/serviceradar/serviceradar-web-ng:sha-<new>

/tmp/gobin/crane mutate \
  --platform linux/amd64 \
  --tag registry.carverauto.dev/serviceradar/serviceradar-web-ng:sha-<new> \
  --entrypoint /app/bin/serviceradar_web_ng \
  --cmd start \
  --env HOME=/app \
  --env PATH=/app/bin:/usr/local/bin:/usr/bin:/bin \
  --env PHX_SERVER=true \
  --env MIX_ENV=prod \
  --exposed-ports 4000/tcp \
  --user 10001:10001 \
  --workdir /app \
  registry.carverauto.dev/serviceradar/serviceradar-web-ng:sha-<new>

/tmp/gobin/crane digest registry.carverauto.dev/serviceradar/serviceradar-web-ng:sha-<new>

kubectl port-forward -n openbao-system svc/openbao-active 18200:8200

OPENBAO_ADDR=https://127.0.0.1:18200
OPENBAO_K8S_ROLE=forgejo-signing-runner   # NOT forgejo-runner (that role does not exist -> 403)
sa_jwt="$(kubectl create token -n forgejo-actions forgejo-signing-runner)"
vault_token="$({
  curl -sS -k \
    -H 'Content-Type: application/json' \
    -d "{\"role\":\"${OPENBAO_K8S_ROLE}\",\"jwt\":\"${sa_jwt}\"}" \
    "${OPENBAO_ADDR}/v1/auth/kubernetes/login"  # HTTPS + -k: the listener is TLS, http:// returns 400
} | jq -er '.auth.client_token')"

export VAULT_ADDR="$OPENBAO_ADDR"
export VAULT_TOKEN="$vault_token"
export COSIGN_KEY_REF=hashivault://cosign-release
export COSIGN_YES=true
export COSIGN_DOCKER_MEDIA_TYPES=1
export COSIGN_REFERRERS_MODE=legacy
export COSIGN_TLOG_UPLOAD=true

cosign sign --key "$COSIGN_KEY_REF" \
  registry.carverauto.dev/serviceradar/serviceradar-web-ng@sha256:<digest>

kubectl patch application -n argocd serviceradar-demo-prod \
  --type merge \
  -p '{"spec":{"source":{"helm":{"parameters":[{"name":"global.imageTag","value":"sha-<new>"}]}}}}'

Synced|Healthy|Succeeded

kubectl get application -n argocd serviceradar-demo-prod \
  -o jsonpath='{.status.sync.status}{"|"}{.status.health.status}{"|"}{.status.operationState.phase}{"\n"}'

kubectl get deploy -n demo \
  serviceradar-web-ng serviceradar-core serviceradar-agent serviceradar-tools \
  -o jsonpath='{range .items[*]}{.metadata.name}{"\t"}{range .spec.template.spec.containers[*]}{.image}{" "}{end}{"\n"}{end}'

kubectl get pods -n demo -o wide
kubectl get jobs -n demo

© carverauto, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in .agents/skills/demo-web-ng-fastpath of carverauto/serviceradar.

• SKILL.md
• agents/openai.yaml

Open the folder on GitHubat commit 2563b3f