pages: every step one task, Task from go.mod, and the gates in task check

.github/workflows/pages.yml

@@ -26,20 +26,14 @@ jobs:
       - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
           go-version-file: go.mod
-      - run: go vet ./...
-      - run: go test ./...
-      - run: go run ./cmd/palette -check
-      - run: go run ./cmd/mark -check
-      - run: go run ./cmd/shots -check
-      - run: go run ./cmd/screens -check
+      # What a developer runs, with the Task go.mod pins.
+      - run: go tool task check
       # The screens' images are not in git: screens.json names the release that holds them, and
       # the page serves them from screens/img.
       - if: github.ref == 'refs/heads/main' && hashFiles('screens/screens.json') != ''
         env:
           GH_TOKEN: ${{ github.token }}
-        run: |
-          mkdir -p screens/img
-          gh release download "$(jq -r .tag screens/screens.json)" --repo "${{ github.repository }}" --pattern screens.tar.gz --output - | tar -xz -C screens/img
+        run: go tool task screens:download
       - if: github.ref == 'refs/heads/main'
         uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0
         with:

.gitignore

@@ -1 +1,2 @@
 .task/
+screens/img/

README.md

@@ -19,12 +19,16 @@ through protanopia, deuteranopia or tritanopia, with every pair the palette is h
 | `assets/mark.png` | `logos/`: the stack of disks, cut from the mark as it was drawn (1024 px on a clear ground): the tile on the brand's navy (512, 256; the touch icon at 180, the favicon at 64 and 32) for a dark ground, and clear (512, 256) for a light one. Each is the drawing reduced; a size it would have to enlarge fails |
 
 ```
-task            # palette and mark: check, and write dist/ and logos/
-task report     # every pair, its contrast or its distance in each view
-task preview    # http://127.0.0.1:4330/
-task check      # what CI runs: fails on a pair below its floor, or a stale dist/ or logos/
+go tool task            # palette and mark: check, and write dist/ and logos/
+go tool task report     # every pair, its contrast or its distance in each view
+go tool task preview    # http://127.0.0.1:4330/
+go tool task check      # what CI runs: fails on a pair below its floor, or a stale dist/ or logos/
 ```
 
+Task is a tool in `go.mod`, so `go tool task` is the version CI runs. `task check` also fails on a
+workflow step that is not one task (`go tool taskgate`) and on a package install that skips Socket
+Firewall (`go tool sfw check`), from [go-tools](https://github.com/spin-stack/go-tools).
+
 ## What holds the palette
 
 `cmd/palette` checks every pair that carries meaning, in both modes, before it writes anything:

Taskfile.yml

@@ -45,11 +45,20 @@ tasks:
       - python3 -m http.server 4330 --bind 127.0.0.1
 
   check:
-    desc: Fail if a pair is below its floor, dist/ or logos/ is not what the sources make, or shots/ lacks a screenshot it lists.
+    desc: What CI runs - fail if a pair is below its floor, dist/ or logos/ is not what the sources make, shots/ lacks a screenshot it lists, a workflow step is not one task, or an install skips Socket Firewall.
     cmds:
+      - go tool taskgate
+      - go tool sfw check
       - go vet ./...
       - go test ./...
       - go run ./cmd/palette -check
       - go run ./cmd/mark -check
       - go run ./cmd/shots -check
       - go run ./cmd/screens -check
+
+  screens:download:
+    desc: Unpack the screens' images into screens/img from the release screens/screens.json names - they are not in git, and the published page serves them from there.
+    cmds:
+      - mkdir -p screens/img
+      # GITHUB_REPOSITORY is set in CI; outside it, this repository.
+      - gh release download "$(jq -r .tag screens/screens.json)" --repo "${GITHUB_REPOSITORY:-spin-stack/brand}" --pattern screens.tar.gz --output - | tar -xz -C screens/img

go.mod

@@ -6,3 +6,142 @@ require (
 	github.com/BurntSushi/toml v1.5.0
 	golang.org/x/image v0.30.0
 )
+
+require (
+	cel.dev/expr v0.25.2 // indirect
+	charm.land/bubbles/v2 v2.1.1 // indirect
+	charm.land/bubbletea/v2 v2.0.8 // indirect
+	charm.land/lipgloss/v2 v2.0.6 // indirect
+	cloud.google.com/go v0.123.0 // indirect
+	cloud.google.com/go/auth v0.23.1 // indirect
+	cloud.google.com/go/auth/oauth2adapt v0.2.8 // indirect
+	cloud.google.com/go/compute/metadata v0.9.0 // indirect
+	cloud.google.com/go/iam v1.13.0 // indirect
+	cloud.google.com/go/monitoring v1.30.0 // indirect
+	cloud.google.com/go/storage v1.64.0 // indirect
+	github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.35.0 // indirect
+	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.59.0 // indirect
+	github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.59.0 // indirect
+	github.com/Ladicle/tabwriter v1.0.0 // indirect
+	github.com/Masterminds/semver/v3 v3.5.0 // indirect
+	github.com/alecthomas/chroma/v2 v2.27.0 // indirect
+	github.com/atotto/clipboard v0.1.4 // indirect
+	github.com/aws/aws-sdk-go-v2 v1.43.4 // indirect
+	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.16 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.32.35 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.19.34 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.35 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.35 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.35 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.36 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.15 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.28 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.35 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.36 // indirect
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.106.5 // indirect
+	github.com/aws/aws-sdk-go-v2/service/signin v1.5.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.33.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.38.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.45.4 // indirect
+	github.com/aws/smithy-go v1.27.6 // indirect
+	github.com/bgentry/go-netrc v0.0.0-20140422174119-9fd32a8b3d3d // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/chainguard-dev/git-urls v1.0.2 // indirect
+	github.com/charmbracelet/colorprofile v0.4.3 // indirect
+	github.com/charmbracelet/ultraviolet v0.0.0-20260811164956-006e29f97886 // indirect
+	github.com/charmbracelet/x/ansi v0.11.8 // indirect
+	github.com/charmbracelet/x/term v0.2.2 // indirect
+	github.com/charmbracelet/x/termios v0.1.1 // indirect
+	github.com/charmbracelet/x/windows v0.2.2 // indirect
+	github.com/clipperhouse/displaywidth v0.11.0 // indirect
+	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
+	github.com/cncf/xds/go v0.0.0-20260202195803-dba9d589def2 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/dlclark/regexp2/v2 v2.7.1 // indirect
+	github.com/docker/cli v29.7.2+incompatible // indirect
+	github.com/docker/docker-credential-helpers v0.9.3 // indirect
+	github.com/dominikbraun/graph v0.23.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/elliotchance/orderedmap/v3 v3.1.1 // indirect
+	github.com/envoyproxy/go-control-plane/envoy v1.39.0 // indirect
+	github.com/envoyproxy/protoc-gen-validate v1.3.3 // indirect
+	github.com/fatih/color v1.19.0 // indirect
+	github.com/felixge/httpsnoop v1.1.0 // indirect
+	github.com/fsnotify/fsnotify v1.10.1 // indirect
+	github.com/go-jose/go-jose/v4 v4.1.4 // indirect
+	github.com/go-logr/logr v1.4.4 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
+	github.com/go-task/task/v3 v3.53.1 // indirect
+	github.com/go-task/template v0.2.0 // indirect
+	github.com/google/go-containerregistry v0.22.1 // indirect
+	github.com/google/s2a-go v0.1.9 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.20 // indirect
+	github.com/googleapis/gax-go/v2 v2.23.0 // indirect
+	github.com/hashicorp/aws-sdk-go-base/v2 v2.0.0-beta.74 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
+	github.com/hashicorp/go-getter v1.8.8 // indirect
+	github.com/hashicorp/go-version v1.9.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/klauspost/compress v1.19.2 // indirect
+	github.com/klauspost/cpuid/v2 v2.4.0 // indirect
+	github.com/klauspost/pgzip v1.2.6 // indirect
+	github.com/lucasb-eyer/go-colorful v1.4.1 // indirect
+	github.com/mattn/go-colorable v0.1.15 // indirect
+	github.com/mattn/go-isatty v0.0.24 // indirect
+	github.com/mattn/go-runewidth v0.0.27 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/mitchellh/hashstructure/v2 v2.0.2 // indirect
+	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.1.1 // indirect
+	github.com/pierrec/lz4/v4 v4.1.27 // indirect
+	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
+	github.com/puzpuzpuz/xsync/v4 v4.5.0 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/sajari/fuzzy v1.0.0 // indirect
+	github.com/sirupsen/logrus v1.9.4 // indirect
+	github.com/spf13/pflag v1.0.10 // indirect
+	github.com/spiffe/go-spiffe/v2 v2.8.1 // indirect
+	github.com/spin-stack/go-tools v0.0.0-20261024185510-dfcf2c10f30b // indirect
+	github.com/stretchr/objx v0.5.3 // indirect
+	github.com/stretchr/testify v1.12.1 // indirect
+	github.com/u-root/u-root v0.16.0 // indirect
+	github.com/u-root/uio v0.0.0-20240224005618-d2acac8f3701 // indirect
+	github.com/ulikunitz/xz v0.5.16 // indirect
+	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	github.com/zeebo/xxh3 v1.1.0 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/contrib/detectors/gcp v1.45.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.70.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.70.0 // indirect
+	go.opentelemetry.io/otel v1.45.0 // indirect
+	go.opentelemetry.io/otel/metric v1.45.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.45.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.45.0 // indirect
+	go.opentelemetry.io/otel/trace v1.45.0 // indirect
+	go.yaml.in/yaml/v3 v3.0.5 // indirect
+	golang.org/x/crypto v0.58.0 // indirect
+	golang.org/x/net v0.61.0 // indirect
+	golang.org/x/oauth2 v0.36.0 // indirect
+	golang.org/x/sync v0.24.0 // indirect
+	golang.org/x/sys v0.49.0 // indirect
+	golang.org/x/term v0.47.0 // indirect
+	golang.org/x/text v0.43.0 // indirect
+	golang.org/x/time v0.15.0 // indirect
+	google.golang.org/api v0.293.0 // indirect
+	google.golang.org/genproto v0.0.0-20260724162435-b2f20204f0df // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260724162435-b2f20204f0df // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260807164820-c8921c73eeea // indirect
+	google.golang.org/grpc v1.83.0 // indirect
+	google.golang.org/protobuf v1.36.12 // indirect
+	mvdan.cc/sh/moreinterp v0.0.0-20260817215856-d6550df7ed8d // indirect
+	mvdan.cc/sh/v3 v3.13.2-0.20260817215856-d6550df7ed8d // indirect
+)
+
+tool (
+	github.com/go-task/task/v3/cmd/task
+	github.com/spin-stack/go-tools/cmd/sfw
+	github.com/spin-stack/go-tools/cmd/taskgate
+)