Add README, Dependabot configuration, and Go linting workflow

Add basic Golang lint that checks generated files, tidyness of go module
formatting, combined with custom lint hook for repo-specific setup.

Configure dependabot for UCI to keep workflows up-to-date.

Update README with basic information.

Author: masih

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/go-lint.yml

@@ -0,0 +1,46 @@
+name: Go
+
+on:
+  workflow_call:
+    inputs:
+      go-version:
+        required: false
+        type: string
+        default: '1.24'
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          # TODO: Automate fetch from go.mod.
+          go-version: '${{ inputs.go-version }}'
+      - name: Run repo-specific setup
+        uses: ./.github/actions/go-check-setup
+        if: hashFiles('./.github/actions/go-lint-setup') != ''
+      - name: Check module tidiness
+        run: |
+          go mod tidy
+          git diff --exit-code go.mod
+          git diff --exit-code go.sum
+      - name: Vet Go files
+        if: always()
+        run: go vet ./...
+      - name: Check formatting
+        if: always()
+        run: |
+          if out="$(gofmt -s -l .)" && test -n "$out"; then
+            echo "Files not gofmt-ed:"
+            echo "$out";
+            exit 1
+          fi
+      - name: Check generated files
+        if: always()
+        run: |
+          go generate -x ./...
+          git diff --exit-code

README.md

@@ -1,2 +1,17 @@
-# uci
-Unified Continuous Integration
+# UCI: Unified Continuous Integration
+
+**UCI (Unified Continuous Integration)** is Sei’s **standard engineering guardrail** for CI. It delivers **consistency** across repositories and **maintainability** through shared, versioned workflows and sensible defaults.
+
+* **Consistency:** One pattern for lint/test/build so teams don’t reinvent CI per repo.
+* **Maintainability:** Centralized modules reduce duplication and drift, making updates safer and faster.
+
+## Status
+
+🚧 **Active development.**
+Current, focus is to support **Golang**; additional languages may be added later.
+
+## Principles
+
+* **Consistency first:** Shared templates & defaults are the norm; overrides are opt-in and minimal.
+* **Maintainability at scale:** Central updates propagate safely; repos stay aligned.
+* **Guardrails, not handcuffs:** Opinionated by default, extensible where it counts.