diff --git a/.github/workflows/stlc-promote.yml b/.github/workflows/stlc-promote.yml
new file mode 100644
index 0000000..5d446ce
--- /dev/null
+++ b/.github/workflows/stlc-promote.yml
@@ -0,0 +1,83 @@
+name: Promote SDKs
+
+# Production requires pull requests, so staging is promoted through a merge-
+# commit PR. Never squash or rebase this cross-repo PR: preserving the incoming
+# commits keeps production and staging on one ancestry chain.
+on:
+  push:
+    branches: [main]
+  workflow_dispatch: {}
+
+permissions:
+  contents: read
+
+jobs:
+  promote:
+    if: github.repository == 'kernel/kernel-go-sdk-staging'
+    runs-on: ${{ vars.STLC_RUNNER || 'ubuntu-latest' }}
+    concurrency:
+      group: stlc-promote
+      cancel-in-progress: true
+    steps:
+      - name: Check out staging
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Mint production token
+        id: production-token
+        uses: actions/create-github-app-token@d72941d797fd3113feb6b93fd0dec494b13a2547 # v1
+        with:
+          app-id: ${{ secrets.ADMIN_APP_ID }}
+          private-key: ${{ secrets.ADMIN_APP_PRIVATE_KEY }}
+          owner: kernel
+          repositories: kernel-go-sdk
+          permission-contents: write
+          permission-workflows: write
+          permission-pull-requests: write
+
+      - name: Fetch production main
+        env:
+          GH_TOKEN: ${{ steps.production-token.outputs.token }}
+          PRODUCTION_REPO: kernel/kernel-go-sdk
+        run: |
+          git remote add production             "https://x-access-token:${GH_TOKEN}@github.com/${PRODUCTION_REPO}.git"
+          git fetch production main
+
+      - name: Check whether production already has staging's content
+        id: diff
+        run: |
+          MERGED=$(git merge-tree --write-tree production/main origin/main) || MERGED=conflict
+          PRODUCTION_TREE=$(git rev-parse 'production/main^{tree}')
+          if [ "$MERGED" = "$PRODUCTION_TREE" ]; then
+            echo "Production already contains staging's content. Nothing to promote."
+            echo "synced=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "synced=false" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Push the production release branch
+        if: steps.diff.outputs.synced == 'false'
+        env:
+          GH_TOKEN: ${{ steps.production-token.outputs.token }}
+          PRODUCTION_REPO: kernel/kernel-go-sdk
+        run: git push production origin/main:refs/heads/stainless/release --force
+
+      - name: Open or update the promote PR
+        if: steps.diff.outputs.synced == 'false'
+        env:
+          GH_TOKEN: ${{ steps.production-token.outputs.token }}
+          PRODUCTION_REPO: kernel/kernel-go-sdk
+        run: |
+          body=$(mktemp)
+          git log --oneline production/main..origin/main > "$body"
+          existing=$(gh pr list --repo "$PRODUCTION_REPO" --head stainless/release             --state open --json number --jq 'if length == 0 then "" else .[0].number end')
+          if [ -z "$existing" ]; then
+            gh pr create --repo "$PRODUCTION_REPO" --base main               --head stainless/release --title "Release SDK updates" --body-file "$body"
+          else
+            gh pr edit "$existing" --repo "$PRODUCTION_REPO"               --title "Release SDK updates" --body-file "$body"
+          fi
+          if ! gh pr merge stainless/release --repo "$PRODUCTION_REPO" --merge --auto; then
+            echo "::warning title=Manual promotion required::Merge the promote PR with a merge commit."
+          fi
diff --git a/.github/workflows/stlc-sync.yml b/.github/workflows/stlc-sync.yml
new file mode 100644
index 0000000..ca263e1
--- /dev/null
+++ b/.github/workflows/stlc-sync.yml
@@ -0,0 +1,107 @@
+name: Sync SDK repos
+
+# Keeps production and staging on one fast-forward-only history. Optional
+# dispatch tokens make the polling loop eager; the scheduled back-sync is the
+# safety backstop when those secrets are absent.
+on:
+  schedule:
+    - cron: '7,37 * * * *'
+  workflow_dispatch: {}
+  repository_dispatch:
+    types: [prod-released]
+  release:
+    types: [published]
+  push:
+    branches: [main]
+
+jobs:
+  back-sync:
+    if: >-
+      github.repository == 'kernel/kernel-go-sdk-staging' &&
+      (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch')
+    runs-on: ${{ vars.STLC_RUNNER || 'ubuntu-latest' }}
+    permissions:
+      contents: write
+    concurrency:
+      group: stlc-back-sync
+      cancel-in-progress: true
+    steps:
+      - name: Check out staging
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 0
+
+      - name: Fetch production main
+        run: |
+          git remote add production "https://github.com/kernel/kernel-go-sdk.git"
+          git -c "http.https://github.com/.extraheader=" fetch production main
+
+      - name: Check whether production has content staging lacks
+        id: diff
+        run: |
+          MERGED=$(git merge-tree --write-tree origin/main production/main) || MERGED=conflict
+          STAGING_TREE=$(git rev-parse 'origin/main^{tree}')
+          if [ "$MERGED" = "$STAGING_TREE" ]; then
+            echo "Staging already has production's content. Nothing to pull back."
+            echo "behind=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "behind=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Sync production to staging
+        if: steps.diff.outputs.behind == 'true'
+        run: |
+          if ! git merge-base --is-ancestor origin/main production/main; then
+            echo "::error title=Back-sync blocked::staging main is not an ancestor of production/main."
+            exit 1
+          fi
+          git push origin production/main:refs/heads/main
+
+  notify-back-sync:
+    if: >-
+      github.repository == 'kernel/kernel-go-sdk' &&
+      (github.event_name == 'release' || github.event_name == 'workflow_dispatch')
+    runs-on: ${{ vars.STLC_RUNNER || 'ubuntu-latest' }}
+    permissions:
+      contents: read
+    steps:
+      - name: Dispatch back-sync to staging
+        env:
+          DISPATCH_TOKEN: ${{ secrets.STAGING_DISPATCH_TOKEN }}
+          REF_NAME: ${{ github.ref_name }}
+        run: |
+          set -euo pipefail
+          if [ -z "${DISPATCH_TOKEN:-}" ]; then
+            echo "::notice::STAGING_DISPATCH_TOKEN not configured; the scheduled back-sync remains active."
+            exit 0
+          fi
+          payload=$(jq -n --arg ref "$REF_NAME" '{event_type:"prod-released",client_payload:{ref:$ref}}')
+          curl --fail-with-body -sS -X POST             -H "Authorization: Bearer $DISPATCH_TOKEN"             -H "Accept: application/vnd.github+json"             -H "X-GitHub-Api-Version: 2022-11-28"             "https://api.github.com/repos/kernel/kernel-go-sdk-staging/dispatches"             -d "$payload"
+
+  seal-dispatch:
+    if: github.repository == 'kernel/kernel-go-sdk-staging' && github.event_name == 'push'
+    runs-on: ${{ vars.STLC_RUNNER || 'ubuntu-latest' }}
+    permissions:
+      contents: read
+    concurrency:
+      group: seal-dispatch-${{ github.ref }}
+      cancel-in-progress: false
+    steps:
+      - name: Dispatch tracking sync
+        env:
+          DISPATCH_TOKEN: ${{ secrets.CONFIG_DISPATCH_TOKEN }}
+          HEAD_MSG: ${{ github.event.head_commit.message }}
+          HEAD_AUTHOR_NAME: ${{ github.event.head_commit.author.name }}
+          SHA: ${{ github.sha }}
+        run: |
+          set -euo pipefail
+          if printf '%s' "$HEAD_MSG" | grep -q 'Stainless-Generated-From' || [ "$HEAD_AUTHOR_NAME" = "stlc-bot" ]; then
+            echo "Generated commit; skipping tracking dispatch."
+            exit 0
+          fi
+          if [ -z "${DISPATCH_TOKEN:-}" ]; then
+            echo "::notice::CONFIG_DISPATCH_TOKEN not configured; the config repo's scheduled sync remains active."
+            exit 0
+          fi
+          payload=$(jq -n --arg sha "$SHA" --arg repo "${{ github.repository }}"             '{event_type:"seal-custom-code",client_payload:{target:"all",sha:$sha,repo:$repo}}')
+          curl --fail-with-body -sS -X POST             -H "Authorization: Bearer $DISPATCH_TOKEN"             -H "Accept: application/vnd.github+json"             -H "X-GitHub-Api-Version: 2022-11-28"             "https://api.github.com/repos/kernel/kernel/dispatches"             -d "$payload"