♻️👷 Use common tags for plugin inclusion/exclusion

Signed-off-by: Evaline Ju <69598118+evaline-ju@users.noreply.github.com>

Author: evaline-ju

.github/workflows/build.yaml

@@ -47,16 +47,14 @@ jobs:
             dockerfile: cmd/authbridge-proxy/Dockerfile
 
           # AuthBridge proxy-sidecar LITE image — the SAME authbridge-proxy
-          # binary + Dockerfile, built with exclude_plugin_* tags so only
-          # jwt-validation + token-exchange compile in (drops the OPA SDK
-          # and the parsers, roughly halving the binary). A build variant,
-          # not a separate binary. Same listener layout as the full proxy
-          # image; not yet referenced by the operator's default config.
+          # binary + Dockerfile, built with a trimmed plugin set (roughly
+          # halving the binary). A build variant, not a separate binary.
+          # GO_BUILD_TAGS is derived at step time from
+          # authbridge/scripts/lite-tags rather than declared here, so
+          # adding a plugin doesn't require editing this file.
           - name: authbridge-lite
             context: ./authbridge
             dockerfile: cmd/authbridge-proxy/Dockerfile
-            build_args: |
-              GO_BUILD_TAGS=exclude_plugin_a2aparser,exclude_plugin_ibac,exclude_plugin_inferenceparser,exclude_plugin_mcpparser,exclude_plugin_opa,exclude_plugin_sparc,exclude_plugin_tokenbroker,exclude_plugin_toolprune
 
           # AuthBridge proxy-sidecar CPEX image — authbridge-proxy built
           # with -tags cpex (links libcpex_ffi.a from a pinned CPEX
@@ -79,6 +77,15 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
 
+      # 1b. Set up Go — needed by the buildargs step for authbridge-lite,
+      # which derives GO_BUILD_TAGS from plugin source at build time.
+      # Cheap to install for every matrix row (~1s of cache pull); no-op
+      # for rows that don't need it.
+      - name: Set up Go
+        uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e  # v7.0.0
+        with:
+          go-version-file: authbridge/scripts/lite-tags/go.mod
+
       # 2. Set up QEMU for multi-arch builds
       - name: Set up QEMU
         uses: docker/setup-qemu-action@96fe6ef7f33517b61c61be40b68a1882f3264fb8  # v4
@@ -121,40 +128,52 @@ jobs:
             # Add 'latest' tag for version tags, workflow_dispatch, and pushes to main
             type=raw,value=latest,enable=${{ (github.ref_type == 'tag' && startsWith(github.ref_name, 'v')) || github.event_name == 'workflow_dispatch' || github.ref == 'refs/heads/main' }}
 
-      # 6b. Resolve build-args. authbridge-cpex needs CPEX_FFI_VERSION
-      # (the release tag) and CPEX_FFI_ABI (the FFI ABI integer the
-      # linked lib must report) — both read from the files next to its
-      # Dockerfile and asserted against the tarball at build time. Other
-      # images leave this empty (an undeclared build-arg is ignored).
+      # 6b. Resolve per-image build-args.
+      #   authbridge-cpex: CPEX_FFI_VERSION (release tag) and CPEX_FFI_ABI
+      #     (integer the linked lib must report), read from the files
+      #     next to its Dockerfile and asserted at build time.
+      #   authbridge-lite: GO_BUILD_TAGS, derived from plugin source
+      #     (authbridge/scripts/lite-tags) so the list stays in sync
+      #     without hand-maintenance.
+      #   Other images leave args empty (an undeclared build-arg is
+      #   ignored).
       - name: Resolve build args
         id: buildargs
         run: |
-          if [[ "${{ matrix.image_config.name }}" == "authbridge-cpex" ]]; then
-            VERSION="$(tr -d '[:space:]' < authbridge/cmd/authbridge-cpex/CPEX_FFI_VERSION)"
-            ABI="$(tr -d '[:space:]' < authbridge/cmd/authbridge-cpex/CPEX_FFI_ABI)"
-            {
-              echo "args<<EOF"
-              echo "CPEX_FFI_VERSION=${VERSION}"
-              echo "CPEX_FFI_ABI=${ABI}"
-              echo "EOF"
-            } >> "$GITHUB_OUTPUT"
-          else
-            echo "args=" >> "$GITHUB_OUTPUT"
-          fi
+          case "${{ matrix.image_config.name }}" in
+            authbridge-cpex)
+              VERSION="$(tr -d '[:space:]' < authbridge/cmd/authbridge-cpex/CPEX_FFI_VERSION)"
+              ABI="$(tr -d '[:space:]' < authbridge/cmd/authbridge-cpex/CPEX_FFI_ABI)"
+              {
+                echo "args<<EOF"
+                echo "CPEX_FFI_VERSION=${VERSION}"
+                echo "CPEX_FFI_ABI=${ABI}"
+                echo "EOF"
+              } >> "$GITHUB_OUTPUT"
+              ;;
+            authbridge-lite)
+              TAGS=$(go -C authbridge/scripts/lite-tags run .)
+              {
+                echo "args<<EOF"
+                echo "GO_BUILD_TAGS=${TAGS}"
+                echo "EOF"
+              } >> "$GITHUB_OUTPUT"
+              ;;
+            *)
+              echo "args=" >> "$GITHUB_OUTPUT"
+              ;;
+          esac
 
       # 7. Build and push image
       - name: Build and push ${{ matrix.image_config.name }}
         uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a  # v7
         with:
           context: ${{ matrix.image_config.context }}
           file: ${{ matrix.image_config.context }}/${{ matrix.image_config.dockerfile }}
-          # Merge both build-arg sources into a single key: static per-image
-          # args from the matrix (e.g. authbridge-lite GO_BUILD_TAGS) plus the
-          # dynamically resolved args (authbridge-cpex CPEX_FFI_*). A duplicate
-          # `build-args:` key is invalid YAML and fails the whole workflow; only
-          # one image sets each source, so concatenating them is safe.
+          # Dynamically-resolved args from step 6b: authbridge-cpex
+          # (CPEX_FFI_*) and authbridge-lite (GO_BUILD_TAGS from
+          # scripts/lite-tags). Other images resolve to empty.
           build-args: |
-            ${{ matrix.image_config.build_args }}
             ${{ steps.buildargs.outputs.args }}
           push: true
           platforms: linux/amd64,linux/arm64

.github/workflows/ci.yaml

@@ -107,9 +107,7 @@ jobs:
       - name: Build + test lite variant (exclude_plugin_* tags)
         if: matrix.binary == 'authbridge-proxy'
         run: |
-          TAGS="exclude_plugin_a2aparser,exclude_plugin_ibac,exclude_plugin_inferenceparser"
-          TAGS="$TAGS,exclude_plugin_mcpparser,exclude_plugin_opa,exclude_plugin_sparc,exclude_plugin_tokenbroker"
-          TAGS="$TAGS,exclude_plugin_toolprune"
+          TAGS=$(go -C ../../scripts/lite-tags run .)
           go build -v -tags "$TAGS" ./...
           go test -v -race -cover -tags "$TAGS" ./...
 

.github/workflows/release-binaries.yaml

@@ -52,10 +52,9 @@ jobs:
           # authbridge-proxy variants: "<suffix>:<build-tags>". Empty
           # suffix is the default plugin set. One variant per opt-in
           # plugin (or one combined "full") — never enumerate combos.
-          lite_tags="exclude_plugin_a2aparser,exclude_plugin_ibac"
-          lite_tags="${lite_tags},exclude_plugin_inferenceparser"
-          lite_tags="${lite_tags},exclude_plugin_mcpparser,exclude_plugin_opa"
-          lite_tags="${lite_tags},exclude_plugin_sparc,exclude_plugin_tokenbroker"
+          # Lite tags are derived from plugin source; see
+          # authbridge/scripts/lite-tags.
+          lite_tags=$(go -C authbridge/scripts/lite-tags run .)
           declare -a proxy_variants=(
             ":"
             "lite:${lite_tags}"
@@ -112,7 +111,7 @@ jobs:
           add ''
           add '`authbridge-proxy` ships in variants matching the container images:'
           add 'unqualified (default plugin set, matches the `authbridge` image),'
-          add '`-lite` (auth-only, matches `authbridge-lite`), plus one variant per'
+          add '`-lite` (trimmed plugin set, matches `authbridge-lite`), plus one variant per'
           add 'opt-in plugin currently offered for try-out (today: `-sessionbudget`).'
           add 'Variants track opt-in plugins one-for-one; arbitrary combinations are not published.'
           add ''

CLAUDE.md

@@ -125,7 +125,7 @@ Two mode-specific binaries (proxy, envoy), one Dockerfile each; the `authbridge-
 |--------|------|-----------|---------|
 | `cmd/authbridge-proxy/` | proxy-sidecar (default) | HTTP forward + reverse proxies | full (incl. parsers) |
 | `cmd/authbridge-envoy/` | envoy-sidecar | gRPC ext_proc on :9090 | full (incl. parsers) |
-| `authbridge-lite` _(image: proxy + `exclude_plugin_*`)_ | proxy-sidecar | HTTP forward + reverse proxies | auth-only (jwt-validation + token-exchange; OPA + parsers dropped) |
+| `authbridge-lite` _(image: proxy + `exclude_plugin_*`)_ | proxy-sidecar | HTTP forward + reverse proxies | trimmed plugin set (see `authbridge/scripts/lite-tags`) |
 
 **Go modules:**
 - `authbridge/authlib/` — pure library: validation, exchange, cache, bypass, spiffe, routing, auth, config, all listener implementations, all plugins.
@@ -139,7 +139,7 @@ Two mode-specific binaries (proxy, envoy), one Dockerfile each; the `authbridge-
 | Workflow | Trigger | Purpose |
 |----------|---------|---------|
 | `ci.yaml` | PR to main/release-* | Pre-commit, Go fmt/vet/build/test for authlib and the cmd/authbridge-* binaries; Python tests |
-| `build.yaml` | Tag push (`v*`) or manual | Multi-arch Docker builds for: proxy-init, authbridge (proxy-sidecar combined), authbridge-envoy (envoy-sidecar combined), authbridge-lite (proxy Dockerfile built with `exclude_plugin_*` tags — auth-only) |
+| `build.yaml` | Tag push (`v*`) or manual | Multi-arch Docker builds for: proxy-init, authbridge (proxy-sidecar combined), authbridge-envoy (envoy-sidecar combined), authbridge-lite (proxy Dockerfile built with `exclude_plugin_*` tags from `authbridge/scripts/lite-tags`) |
 | `security-scans.yaml` | PR to main | Dependency review, shellcheck, YAML lint, Hadolint, Bandit, Trivy, CodeQL |
 | `scorecard.yaml` | Weekly / push to main | OpenSSF Scorecard security health metrics |
 | `spellcheck_action.yml` | PR | Spellcheck on markdown files |
@@ -170,7 +170,7 @@ All images are pushed to `ghcr.io/rossoctl/cortex/` from
 |-------|--------|-------------|
 | **`authbridge`** | **`authbridge/cmd/authbridge-proxy/Dockerfile`** | **proxy-sidecar combined image (default mode): authbridge-proxy (full plugin set incl. parsers) + spiffe-helper. No Envoy.** |
 | `authbridge-envoy` | `authbridge/cmd/authbridge-envoy/Dockerfile` | envoy-sidecar combined image: Envoy + authbridge-envoy (ext_proc, full plugin set) + spiffe-helper |
-| `authbridge-lite` | `authbridge/cmd/authbridge-proxy/Dockerfile` (+ `GO_BUILD_TAGS=exclude_plugin_*`) | proxy-sidecar combined image built auth-only (jwt-validation + token-exchange; OPA + parsers dropped) + spiffe-helper. A build variant of `authbridge`, not a separate binary; not yet referenced by the operator's default config |
+| `authbridge-lite` | `authbridge/cmd/authbridge-proxy/Dockerfile` (+ `GO_BUILD_TAGS=exclude_plugin_*`) | proxy-sidecar combined image with a trimmed plugin set (see `authbridge/scripts/lite-tags`), plus spiffe-helper. A build variant of `authbridge`, not a separate binary; not yet referenced by the operator's default config |
 | `authbridge-cpex` | `authbridge/cmd/authbridge-cpex/Dockerfile` | proxy-sidecar build with the CPEX plugin: authbridge-proxy built with `-tags cpex`, links `libcpex_ffi.a` from a pinned CPEX release (CGO_ENABLED=1). Routes hooks through the CPEX framework (APL DSL + named CPEX policy plugins). FFI ABI version is read from `authbridge/cmd/authbridge-cpex/CPEX_FFI_VERSION` |
 | `proxy-init` | `authbridge/proxy-init/Dockerfile.init` | Alpine + iptables init container (envoy-sidecar + proxy-sidecar enforce-redirect modes) |
 
@@ -252,9 +252,11 @@ cd authbridge/proxy-init && make docker-build-init
 # Combined sidecars (proxy-sidecar default / envoy-sidecar)
 cd authbridge && podman build -f cmd/authbridge-proxy/Dockerfile -t authbridge:latest .
 cd authbridge && podman build -f cmd/authbridge-envoy/Dockerfile -t authbridge-envoy:latest .
-# authbridge-lite: same proxy Dockerfile, built with exclude_plugin_* tags (auth-only)
-cd authbridge && podman build -f cmd/authbridge-proxy/Dockerfile \
-  --build-arg GO_BUILD_TAGS="exclude_plugin_a2aparser,exclude_plugin_ibac,exclude_plugin_inferenceparser,exclude_plugin_mcpparser,exclude_plugin_opa,exclude_plugin_sparc,exclude_plugin_tokenbroker,exclude_plugin_toolprune" \
+# authbridge-lite: same proxy Dockerfile, built with the trimmed
+# plugin set derived from plugin source by
+# authbridge/scripts/lite-tags.
+cd authbridge && LITE_TAGS=$(go -C scripts/lite-tags run .) && podman build -f cmd/authbridge-proxy/Dockerfile \
+  --build-arg GO_BUILD_TAGS="${LITE_TAGS}" \
   -t authbridge-lite:latest .
 ```
 

authbridge/CLAUDE.md

@@ -45,7 +45,7 @@ ships in variants that mirror the container images:
 | Variant | Tarball name shape | Matches |
 |---|---|---|
 | unqualified (default plugins) | `authbridge-proxy_<ver>_<os>_<arch>.tar.gz` | `authbridge` image |
-| `-lite` (drops the OPA SDK and the protocol parsers) | `authbridge-proxy-lite_<ver>_<os>_<arch>.tar.gz` | `authbridge-lite` image |
+| `-lite` (trimmed plugin set — see `authbridge/scripts/lite-tags`) | `authbridge-proxy-lite_<ver>_<os>_<arch>.tar.gz` | `authbridge-lite` image |
 | `-sessionbudget` (default + opt-in session-budget) | `authbridge-proxy-sessionbudget_<ver>_<os>_<arch>.tar.gz` | no image today |
 
 One variant per opt-in plugin currently offered for try-out (today:
@@ -411,9 +411,11 @@ make load-image                     # Uses KIND_CLUSTER_NAME env var (default: r
 cd ..
 podman build -f cmd/authbridge-proxy/Dockerfile -t authbridge:latest .       # proxy-sidecar (default)
 podman build -f cmd/authbridge-envoy/Dockerfile -t authbridge-envoy:latest . # envoy-sidecar
-# authbridge-lite: the proxy Dockerfile built with exclude_plugin_* tags (auth-only)
+# authbridge-lite: the proxy Dockerfile built with a trimmed plugin
+# set derived from plugin source by scripts/lite-tags.
+LITE_TAGS=$(go -C scripts/lite-tags run .)
 podman build -f cmd/authbridge-proxy/Dockerfile \
-  --build-arg GO_BUILD_TAGS="exclude_plugin_a2aparser,exclude_plugin_ibac,exclude_plugin_inferenceparser,exclude_plugin_mcpparser,exclude_plugin_opa,exclude_plugin_sparc,exclude_plugin_tokenbroker,exclude_plugin_toolprune" \
+  --build-arg GO_BUILD_TAGS="${LITE_TAGS}" \
   -t authbridge-lite:latest .
 kind load docker-image authbridge:latest       --name rossoctl
 kind load docker-image authbridge-envoy:latest --name rossoctl

authbridge/README.md

@@ -40,13 +40,13 @@ Two container images are published:
 |-------|----------|
 | `authbridge` | proxy-sidecar combined: authbridge-proxy binary + bundled spiffe-helper |
 | `authbridge-envoy` | envoy-sidecar combined: Envoy + ext_proc + bundled spiffe-helper |
-| `authbridge-lite` | `authbridge-proxy` built with `exclude_plugin_*` tags — auth-only (jwt-validation + token-exchange; OPA + parsers dropped). A build variant, not a separate binary |
+| `authbridge-lite` | `authbridge-proxy` built with `exclude_plugin_*` tags from `authbridge/scripts/lite-tags` (trimmed plugin set). A build variant, not a separate binary |
 
 | Mode | Image | Use Case | How It Works |
 |------|-------|----------|-------------|
 | `proxy-sidecar` (default) | `authbridge` | HTTP_PROXY-based forward + reverse proxies | Agent routes outbound traffic through forward proxy; reverse proxy validates inbound JWTs |
 | `envoy-sidecar` | `authbridge-envoy` | Transparent interception via iptables | Envoy intercepts all traffic, delegates auth to authbridge via ext_proc gRPC |
-| `lite` | `authbridge-lite` | The `authbridge-proxy` binary built with `exclude_plugin_*` tags (auth-only: jwt-validation + token-exchange) | For size-constrained deployments that don't need protocol-aware session events |
+| `lite` | `authbridge-lite` | The `authbridge-proxy` binary built with `exclude_plugin_*` tags from `authbridge/scripts/lite-tags` (trimmed plugin set) | For size-constrained deployments that don't need protocol-aware session events |
 
 The operator resolves the mode per workload from `AgentRuntime.Spec.AuthBridgeMode` → namespace ConfigMap → deprecated `rossoctl.io/authbridge-mode` annotation → cluster default (`proxy-sidecar`). See operator#361.
 
@@ -480,7 +480,7 @@ plugin package from being imported and compiled into the binary.
 - [authlib](authlib/README.md) — Shared auth building blocks (Go library)
 - [cmd/authbridge-proxy](cmd/authbridge-proxy/) — proxy-sidecar binary (default mode, full plugin set)
 - [cmd/authbridge-envoy](cmd/authbridge-envoy/) — envoy-sidecar binary (Envoy + ext_proc, full plugin set)
-- `authbridge-lite` image — `cmd/authbridge-proxy` built with `exclude_plugin_*` tags (auth-only); a build variant, not a separate binary
+- `authbridge-lite` image — `cmd/authbridge-proxy` built with `exclude_plugin_*` tags from `authbridge/scripts/lite-tags` (trimmed plugin set); a build variant, not a separate binary
 - [proxy-init](proxy-init/README.md) — iptables init container (envoy-sidecar mode only)
 - [docs/](docs/) — framework architecture and plugin author references
 

authbridge/cmd/README.md

@@ -75,6 +75,7 @@ inbound mechanism, and the preset fills only that one's address.
   iptables init container.
 - **Size-constrained, no protocol-aware events needed**: use the
   `authbridge-lite` image — the `authbridge-proxy` binary built with
-  `exclude_plugin_*` tags (auth-only). Same listener layout, but without
-  parsers/OPA — abctl will only see denial events and basic auth-level
-  invocations, not full A2A/MCP/Inference protocol context.
+  `exclude_plugin_*` tags from `authbridge/scripts/lite-tags` (trimmed
+  plugin set). Same listener layout, but abctl will only see denial
+  events and basic auth-level invocations for the plugins the trimmed
+  set drops.

authbridge/demos/README.md

@@ -6,8 +6,9 @@ more AuthBridge capabilities.
 
 > **Note:** These demos use the operator-injected combined sidecar (after
 > cortex#411 — `authbridge` for proxy-sidecar, `authbridge-envoy`
-> for envoy-sidecar, and `authbridge-lite`, the proxy image built auth-only
-> via `exclude_plugin_*` tags). The previous `authbridge-unified` image and the per-component
+> for envoy-sidecar, and `authbridge-lite`, the proxy image built with a
+> trimmed plugin set via `exclude_plugin_*` tags from
+> `authbridge/scripts/lite-tags`). The previous `authbridge-unified` image and the per-component
 > sidecars (`client-registration`, standalone `spiffe-helper`) have been
 > removed.
 

authbridge/go.work

@@ -7,5 +7,6 @@ use (
 	./cmd/authbridge-envoy
 	./cmd/authbridge-praxis
 	./cmd/authbridge-proxy
+	./scripts/lite-tags
 	./storage/redis
 )

authbridge/scripts/lite-tags/go.mod

@@ -0,0 +1,3 @@
+module github.com/rossoctl/cortex/authbridge/scripts/lite-tags
+
+go 1.26.5