diff --git a/.github/workflows/dev-beta-release.yaml b/.github/workflows/dev-beta-release.yaml
new file mode 100644
index 00000000..a949f3fb
--- /dev/null
+++ b/.github/workflows/dev-beta-release.yaml
@@ -0,0 +1,320 @@
+name: Dev CI and Beta Release
+
+on:
+  push:
+    branches: [dev]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: dev-beta-release-${{ github.ref }}
+  cancel-in-progress: false
+
+env:
+  GHCR_IMAGE: ghcr.io/${{ github.repository }}
+  DOCKERHUB_IMAGE: digitop/goclaw
+  INITIAL_VERSION: 3.11.3
+  PRERELEASE_ID: beta
+
+jobs:
+  go:
+    runs-on: ubuntu-latest
+    services:
+      pg:
+        image: pgvector/pgvector:pg18
+        env:
+          POSTGRES_PASSWORD: test
+          POSTGRES_DB: goclaw_test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd "pg_isready -U postgres"
+          --health-interval 5s
+          --health-timeout 3s
+          --health-retries 10
+    env:
+      TEST_DATABASE_URL: postgres://postgres:test@localhost:5432/goclaw_test?sslmode=disable
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
+      - run: go build ./...
+      - run: go build -tags sqliteonly ./...
+      - run: go vet ./...
+      - name: Unit tests
+        run: go test -race -timeout=5m -coverpkg=./... -coverprofile=coverage.out ./...
+      - name: Invariant tests (P0)
+        run: go test -race -timeout=90s -tags integration ./tests/invariants/...
+      - name: Contract tests (P1)
+        run: go test -race -timeout=90s -tags integration ./tests/contracts/... || echo "::warning::Contract tests skipped (no server configured)"
+        continue-on-error: true
+      - name: Integration tests
+        run: go test -race -timeout=180s -tags integration ./tests/integration/
+      - name: Coverage summary
+        run: go tool cover -func=coverage.out | tail -1
+
+  web:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ui/web
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+          cache-dependency-path: ui/web/pnpm-lock.yaml
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm lint
+      - run: pnpm build
+
+  release_preflight:
+    needs: [go, web]
+    if: github.ref == 'refs/heads/dev'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Validate release secrets
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+          DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
+        run: |
+          test -n "$DOCKERHUB_USERNAME" || { echo "::error::Missing DOCKERHUB_USERNAME secret"; exit 1; }
+          test -n "$DOCKERHUB_TOKEN" || { echo "::error::Missing DOCKERHUB_TOKEN secret"; exit 1; }
+
+  beta_version:
+    needs: [go, web, release_preflight]
+    if: github.ref == 'refs/heads/dev'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    outputs:
+      released: ${{ steps.version.outputs.released }}
+      version: ${{ steps.version.outputs.version }}
+      tag: ${{ steps.version.outputs.tag }}
+      notes_path: ${{ steps.version.outputs.notes_path }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Fetch upstream release tags
+        run: git fetch --force --tags https://github.com/nextlevelbuilder/goclaw.git "refs/tags/v*:refs/tags/v*"
+      - name: Compute semantic beta version
+        id: version
+        run: node scripts/ci/semantic-beta-version.mjs
+      - name: Create or verify beta tag
+        if: steps.version.outputs.released == 'true'
+        env:
+          TAG: ${{ steps.version.outputs.tag }}
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          if ! git rev-parse "$TAG" >/dev/null 2>&1; then
+            git tag -a "$TAG" -m "Release $TAG"
+            git push origin "$TAG"
+          fi
+      - name: Upload release notes
+        if: steps.version.outputs.released == 'true'
+        uses: actions/upload-artifact@v4
+        with:
+          name: release-notes
+          path: ${{ steps.version.outputs.notes_path }}
+
+  build_binaries:
+    needs: beta_version
+    if: needs.beta_version.outputs.released == 'true'
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+          - goos: linux
+            goarch: arm64
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ needs.beta_version.outputs.tag }}
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Build web UI
+        run: |
+          corepack enable && corepack prepare pnpm@10.28.2 --activate
+          cd ui/web && pnpm install --frozen-lockfile && pnpm build && cd ../..
+          mkdir -p internal/webui/dist
+          cp -r ui/web/dist/* internal/webui/dist/
+
+      - name: Build binary
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+          VERSION: ${{ needs.beta_version.outputs.tag }}
+        run: |
+          CGO_ENABLED=0 go build -tags embedui \
+            -ldflags="-s -w -X github.com/nextlevelbuilder/goclaw/cmd.Version=${VERSION}" \
+            -o goclaw .
+          tar -czf "goclaw-${VERSION}-${{ matrix.goos }}-${{ matrix.goarch }}.tar.gz" goclaw migrations/
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: binary-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: goclaw-*.tar.gz
+
+  publish_release:
+    needs: [beta_version, build_binaries, promote_beta_aliases]
+    if: needs.beta_version.outputs.released == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          pattern: binary-*
+          path: artifacts
+          merge-multiple: true
+
+      - name: Download release notes
+        uses: actions/download-artifact@v4
+        with:
+          name: release-notes
+          path: release-notes
+
+      - name: Publish prerelease
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAG: ${{ needs.beta_version.outputs.tag }}
+        run: |
+          if gh release view "$TAG" >/dev/null 2>&1; then
+            gh release edit "$TAG" \
+              --title "GoClaw $TAG" \
+              --notes-file release-notes/release-notes.md \
+              --prerelease
+          else
+            gh release create "$TAG" \
+              --title "GoClaw $TAG" \
+              --notes-file release-notes/release-notes.md \
+              --prerelease
+          fi
+          gh release upload "$TAG" artifacts/* --clobber
+
+  docker_images:
+    needs: beta_version
+    if: needs.beta_version.outputs.released == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - variant: latest
+            suffix: ""
+            enable_otel: "false"
+            enable_embedui: "true"
+            enable_python: "true"
+            enable_full_skills: "false"
+          - variant: full
+            suffix: "-full"
+            enable_otel: "false"
+            enable_embedui: "true"
+            enable_python: "true"
+            enable_full_skills: "true"
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ needs.beta_version.outputs.tag }}
+
+      - uses: docker/setup-qemu-action@v3
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ${{ env.GHCR_IMAGE }}
+            ${{ env.DOCKERHUB_IMAGE }}
+          tags: |
+            type=raw,value=${{ needs.beta_version.outputs.tag }},suffix=${{ matrix.suffix }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            ENABLE_OTEL=${{ matrix.enable_otel }}
+            ENABLE_EMBEDUI=${{ matrix.enable_embedui }}
+            ENABLE_PYTHON=${{ matrix.enable_python }}
+            ENABLE_FULL_SKILLS=${{ matrix.enable_full_skills }}
+            VERSION=${{ needs.beta_version.outputs.tag }}
+          cache-from: type=gha,scope=dev-beta-${{ matrix.variant }}
+          cache-to: type=gha,mode=max,scope=dev-beta-${{ matrix.variant }}
+
+  promote_beta_aliases:
+    needs: [beta_version, docker_images]
+    if: needs.beta_version.outputs.released == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Promote beta aliases
+        env:
+          TAG: ${{ needs.beta_version.outputs.tag }}
+        run: |
+          docker buildx imagetools create -t "${GHCR_IMAGE}:beta" "${GHCR_IMAGE}:${TAG}"
+          docker buildx imagetools create -t "${GHCR_IMAGE}:beta-full" "${GHCR_IMAGE}:${TAG}-full"
+          docker buildx imagetools create -t "${DOCKERHUB_IMAGE}:beta" "${DOCKERHUB_IMAGE}:${TAG}"
+          docker buildx imagetools create -t "${DOCKERHUB_IMAGE}:beta-full" "${DOCKERHUB_IMAGE}:${TAG}-full"
diff --git a/CLAUDE.md b/CLAUDE.md
index cb17ab16..3990b838 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -123,6 +123,7 @@ make desktop-dmg VERSION=0.1.0               # Create .dmg installer (macOS only
 | Workflow | Trigger | Purpose |
 |----------|---------|---------|
 | `ci.yaml` | push main, PR→main/dev | Go build+test+vet, Web build |
+| `dev-beta-release.yaml` | push dev | Go build+test+vet, Web build, semantic beta prerelease, beta Docker |
 | `release.yaml` | tag `v[0-9]+.[0-9]+.[0-9]+` | Binaries + Docker (4 variants + web) + Discord |
 | `release-beta.yaml` | tag `v*-beta*` / `v*-rc*` | Beta binaries + Docker + GitHub prerelease |
 | `release-desktop.yaml` | tag `lite-v*` | Desktop app (macOS+Windows), auto prerelease for `-beta`/`-rc` tags |
@@ -136,7 +137,8 @@ git tag v3.0.0 && git push origin v3.0.0
 
 **Beta release** (from dev):
 ```bash
-git tag v2.67.0-beta.1 && git push origin v2.67.0-beta.1   # standard beta
+git push origin dev                                         # auto beta via CI
+git tag v2.67.0-beta.1 && git push origin v2.67.0-beta.1   # manual/backfill beta
 git tag lite-v1.2.0-beta.1 && git push origin lite-v1.2.0-beta.1  # lite beta
 ```
 
@@ -163,9 +165,10 @@ OTel and Tailscale variants are not pre-built — build from source with the app
 ### Tag Pattern Safety
 
 - `release.yaml`: tag-triggered (`v[0-9]+.[0-9]+.[0-9]+`) — clean semver only, no beta/rc
+- `dev-beta-release.yaml`: branch-triggered on `dev`; creates `vX.Y.Z-beta.N` tags after CI passes
 - `release-beta.yaml`: tag-triggered (`v*-beta*`, `v*-rc*`) — never matches clean semver
 - `release-desktop.yaml`: tag-triggered (`lite-v*`) — `lite-` prefix prevents overlap
-- No workflow triggers overlap — each tag pattern is distinct. Merging to `main` only triggers CI, not release
+- Stable and desktop tag patterns remain distinct. `dev` branch pushes create beta releases only after CI passes
 
 ## Desktop Edition (Lite)
 
diff --git a/docs/project-changelog.md b/docs/project-changelog.md
index b4923f45..920939cc 100644
--- a/docs/project-changelog.md
+++ b/docs/project-changelog.md
@@ -6,6 +6,16 @@ Significant changes, features, and fixes in reverse chronological order.
 
 ## 2026-05-17
 
+### CI/CD: dev branch beta automation
+
+**Features**
+
+- Added a `Dev CI and Beta Release` GitHub Actions workflow for `dev` pushes that runs Go and Web UI checks before publishing a beta prerelease.
+- Added semantic-release-style beta version calculation from Conventional Commits, creating `vX.Y.Z-beta.N` tags and prereleases automatically after tests pass.
+- Beta automation uploads Linux binaries and publishes `beta` Docker image tags for the same release version.
+
+---
+
 ### Agent Permissions: channel and workspace matrix
 
 **Features**
diff --git a/scripts/ci/semantic-beta-version.mjs b/scripts/ci/semantic-beta-version.mjs
new file mode 100644
index 00000000..f4a01609
--- /dev/null
+++ b/scripts/ci/semantic-beta-version.mjs
@@ -0,0 +1,180 @@
+#!/usr/bin/env node
+import { execFileSync } from "node:child_process";
+import { writeFileSync, appendFileSync } from "node:fs";
+
+const prerelease = process.env.PRERELEASE_ID || "beta";
+const initialVersion = process.env.INITIAL_VERSION || "0.1.0";
+
+function git(args) {
+  return execFileSync("git", args, { encoding: "utf8" }).trim();
+}
+
+function setOutput(name, value) {
+  const output = process.env.GITHUB_OUTPUT;
+  if (output) {
+    appendFileSync(output, `${name}=${value}\n`);
+    return;
+  }
+  console.log(`${name}=${value}`);
+}
+
+function parseVersion(value) {
+  const match = /^v?(\d+)\.(\d+)\.(\d+)(?:-([0-9A-Za-z-]+)\.(\d+))?$/.exec(value);
+  if (!match) return null;
+  return {
+    raw: value,
+    major: Number(match[1]),
+    minor: Number(match[2]),
+    patch: Number(match[3]),
+    preid: match[4] || "",
+    prenumber: match[5] ? Number(match[5]) : 0,
+  };
+}
+
+function tagCommit(tag) {
+  return git(["rev-list", "-n", "1", tag]);
+}
+
+function compareBase(a, b) {
+  return a.major - b.major || a.minor - b.minor || a.patch - b.patch;
+}
+
+function compareVersion(a, b) {
+  const base = compareBase(a, b);
+  if (base !== 0) return base;
+  if (!a.preid && b.preid) return 1;
+  if (a.preid && !b.preid) return -1;
+  if (a.preid !== b.preid) return a.preid.localeCompare(b.preid);
+  return a.prenumber - b.prenumber;
+}
+
+function bump(base, level) {
+  if (level === "major") return { major: base.major + 1, minor: 0, patch: 0 };
+  if (level === "minor") return { major: base.major, minor: base.minor + 1, patch: 0 };
+  return { major: base.major, minor: base.minor, patch: base.patch + 1 };
+}
+
+function versionText(version) {
+  return `${version.major}.${version.minor}.${version.patch}`;
+}
+
+function commitLevel(message) {
+  const header = message.split(/\r?\n/, 1)[0] || "";
+  if (/^[a-zA-Z]+(?:\([^)]+\))?!:/.test(header) || /\nBREAKING[ -]CHANGE:/.test(message)) {
+    return "major";
+  }
+  if (/^feat(?:\([^)]+\))?:/.test(header)) return "minor";
+  if (/^(fix|perf)(?:\([^)]+\))?:/.test(header) || /^revert:/.test(header)) return "patch";
+  return "";
+}
+
+function maxBase(a, b) {
+  return compareBase(a, b) >= 0 ? a : b;
+}
+
+function writeNoRelease(reason) {
+  setOutput("released", "false");
+  setOutput("version", "");
+  setOutput("tag", "");
+  console.log(reason);
+}
+
+const tags = git(["tag", "--merged", "HEAD", "--list", "v[0-9]*"])
+  .split(/\r?\n/)
+  .filter(Boolean)
+  .map(parseVersion)
+  .filter(Boolean)
+  .map((tag) => ({ ...tag, commit: tagCommit(tag.raw) }))
+  .sort(compareVersion)
+  .reverse();
+
+const latest = tags[0];
+const latestStable = tags.find((tag) => !tag.preid);
+const latestPrerelease = tags.find((tag) => tag.preid === prerelease);
+const head = git(["rev-parse", "HEAD"]);
+const previousTag = tags.find((tag) => tag.raw !== latest?.raw);
+const repairTag = latest?.preid === prerelease && latest.commit === head ? latest : null;
+const range = latest ? [`${latest.raw}..HEAD`] : [];
+const logRange = repairTag && previousTag ? [`${previousTag.raw}..HEAD`] : range;
+const log = git(["log", "--format=%B%x1e", ...logRange]);
+const messages = log.split("\x1e").map((message) => message.trim()).filter(Boolean);
+
+if (latest?.preid && latest.preid !== prerelease) {
+  writeNoRelease(`Latest prerelease tag ${latest.raw} is not a ${prerelease} release; skipping ${prerelease} automation.`);
+  process.exit(0);
+}
+
+if (repairTag) {
+  const version = repairTag.raw.replace(/^v/, "");
+  const releaseNotes = [
+    `## ${repairTag.raw}`,
+    "",
+    `Automated ${prerelease} release from ${head}.`,
+    "",
+    "### Changes",
+    "",
+    ...(messages.length ? messages.map((message) => `- ${message.split(/\r?\n/, 1)[0]}`) : ["- Repair release assets for this tag."]),
+    "",
+  ].join("\n");
+
+  writeFileSync("release-notes.md", releaseNotes);
+  setOutput("released", "true");
+  setOutput("version", version);
+  setOutput("tag", repairTag.raw);
+  setOutput("notes_path", "release-notes.md");
+  console.log(`Repairing ${prerelease} release: ${repairTag.raw}`);
+  process.exit(0);
+}
+
+let level = "";
+for (const message of messages) {
+  const next = commitLevel(message);
+  if (next === "major") {
+    level = "major";
+    break;
+  }
+  if (next === "minor" && level !== "major") level = "minor";
+  if (next === "patch" && !level) level = "patch";
+}
+
+if (!level) {
+  writeNoRelease("No release-worthy conventional commits found since the last release tag.");
+  process.exit(0);
+}
+
+const zero = { major: 0, minor: 0, patch: 0 };
+const initial = parseVersion(initialVersion) || { major: 0, minor: 1, patch: 0 };
+const stableBase = latestStable || initial || zero;
+const bumpedBase = bump(stableBase, level);
+const prereleaseBase = latestPrerelease || zero;
+let targetBase = maxBase(bumpedBase, prereleaseBase);
+if (!latest && compareBase(targetBase, initial) < 0) targetBase = initial;
+
+const nextNumber = compareBase(targetBase, prereleaseBase) === 0
+  ? latestPrerelease.prenumber + 1
+  : 1;
+const version = `${versionText(targetBase)}-${prerelease}.${nextNumber}`;
+const tag = `v${version}`;
+
+if (tags.some((existing) => existing.raw === tag)) {
+  writeNoRelease(`Computed tag ${tag} already exists.`);
+  process.exit(0);
+}
+
+const releaseNotes = [
+  `## ${tag}`,
+  "",
+  `Automated ${prerelease} release from ${process.env.GITHUB_SHA || git(["rev-parse", "HEAD"])}.`,
+  "",
+  "### Changes",
+  "",
+  ...messages.map((message) => `- ${message.split(/\r?\n/, 1)[0]}`),
+  "",
+].join("\n");
+
+writeFileSync("release-notes.md", releaseNotes);
+setOutput("released", "true");
+setOutput("version", version);
+setOutput("tag", tag);
+setOutput("notes_path", "release-notes.md");
+console.log(`Next ${prerelease} release: ${tag}`);