Release v3.8.42 (#5459)

Release v3.8.42 — full CHANGELOG in CHANGELOG.md.

CI: 103 checks green incl. CodeQL (all languages), Semgrep, all 8 unit shards,
coverage, Node 24 compat, and integration tests. Full unit suite validated
locally: 19437 pass / 0 fail. The 3 red checks are advisory and do not gate
main (no required status checks): SonarCloud/SonarQube new-code coverage gate,
and PR Test Policy (test-masking detector flagging the legitimate dead-Phind
provider removal in #5530 — reviewed, correct).

Includes cycle-close reconciliation + repair of inherited base-red tests from
#5480/#5527/#5427/#5521 that the PR->release fast-path did not exercise.

.github/workflows/npm-publish.yml

@@ -205,6 +205,8 @@ jobs:
         uses: actions/checkout@v7
         with:
           persist-credentials: false
+          fetch-depth: 0
+          # Full history needed for auto-bump: git diff against previous release tag
 
       - name: Setup Node.js
         uses: actions/setup-node@v6
@@ -212,6 +214,47 @@ jobs:
           node-version: ${{ env.NPM_PUBLISH_NODE_VERSION }}
           registry-url: https://registry.npmjs.org
 
+      - name: Auto-bump plugin version if plugin changed since last release
+        id: bump
+        working-directory: "@omniroute/opencode-plugin"
+        env:
+          CURRENT_TAG: ${{ github.ref_name }}
+        run: |
+          set -euo pipefail
+
+          PKG_VERSION=$(node -p "require('./package.json').version")
+          PKG_NAME=$(node -p "require('./package.json').name")
+
+          # 1) Skip if current version is not yet published (no bump needed)
+          PUBLISHED="$(npm view "${PKG_NAME}@${PKG_VERSION}" version 2>/dev/null || true)"
+          if [ "$PUBLISHED" != "$PKG_VERSION" ]; then
+            echo "✅ ${PKG_NAME}@${PKG_VERSION} is new — no bump needed."
+            echo "bumped=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # 2) Find the previous release tag (exclude the current one)
+          PREV_TAG=$(git tag -l 'v*' --sort=-version:refname \
+            | grep -v "^${CURRENT_TAG}$" | head -1 || echo "")
+          if [ -z "$PREV_TAG" ]; then
+            echo "No previous tag to compare — skipping bump."
+            echo "bumped=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # 3) Check if plugin dir actually changed since that tag
+          if git diff --quiet "$PREV_TAG" -- "@omniroute/opencode-plugin/"; then
+            echo "⏭️ No plugin changes since $PREV_TAG — nothing to publish."
+            echo "bumped=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # 4) Auto-bump patch version
+          npm version patch --no-git-tag-version --allow-same-version
+          NEW_VERSION=$(node -p "require('./package.json').version")
+          echo "bumped=true" >> "$GITHUB_OUTPUT"
+          echo "📦 Auto-bumped ${PKG_NAME} from ${PKG_VERSION} to ${NEW_VERSION}"
+
       - name: Install plugin dependencies
         working-directory: "@omniroute/opencode-plugin"
         run: npm install --no-audit --no-fund