diff --git a/.github/workflows/regenerate-sdks.yml b/.github/workflows/regenerate-sdks.yml
index e224580..2718861 100644
--- a/.github/workflows/regenerate-sdks.yml
+++ b/.github/workflows/regenerate-sdks.yml
@@ -39,6 +39,7 @@ on:
 permissions:
   contents: write
   pull-requests: write
+  issues: write
 
 jobs:
   regenerate:
@@ -109,6 +110,39 @@ jobs:
           diff /tmp/spec-pass-1.yaml dist/coval-openapi.yaml
           echo "✓ Codegen output is deterministic across two consecutive runs."
 
+      - name: Bump versions if the generated output changed
+        run: |
+          set -euo pipefail
+          # git status, not git diff — a new spec model arrives as an untracked
+          # file and would not show up in a diff against HEAD.
+          changed() { [ -n "$(git status --porcelain -- "$1")" ]; }
+
+          # An array, and `if` rather than `cmd && assign`: under `set -e` a
+          # failing `&&` list is itself a failing statement and would abort the
+          # step the moment one of the two SDKs had no changes.
+          args=()
+          python_changed=false
+          if changed python-sdk/src/coval_sdk; then
+            args+=(--python)
+            python_changed=true
+          fi
+          if changed typescript-sdk/src/generated; then
+            args+=(--typescript)
+          fi
+
+          if [ ${#args[@]} -eq 0 ]; then
+            echo "No generated changes; leaving versions alone."
+            exit 0
+          fi
+
+          python3 scripts/bump-sdk-version.py "${args[@]}"
+
+          # The Python package version is baked into the generated tree by
+          # generate-sdks.sh, so codegen has to run again to pick up the bump.
+          if [ "${python_changed}" = true ]; then
+            bash scripts/generate-sdks.sh
+          fi
+
       - name: Install TS SDK deps + build + test
         working-directory: typescript-sdk
         run: |
@@ -152,3 +186,53 @@ jobs:
             typescript-sdk/src/generated/
             python-sdk/src/coval_sdk/
             python-sdk/GENERATED_README.md
+            python-sdk/pyproject.toml
+            python-sdk/tests/test_client.py
+            typescript-sdk/package.json
+            typescript-sdk/package-lock.json
+
+      # This job failed silently every week from 2026-07-13 to 2026-07-29. A
+      # scheduled workflow has no reviewer and nobody watches the Actions tab,
+      # so the SDKs drifted from the API for sixteen days with no signal. File
+      # an issue on failure, and reuse a single one so repeated weekly failures
+      # accumulate in one thread instead of spamming.
+      - name: File an issue if the regen failed
+        if: failure()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const title = 'Weekly SDK regeneration is failing';
+            const runUrl = `${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`;
+            const body = [
+              `The scheduled \`Regenerate SDKs\` job failed.`,
+              ``,
+              `Run: ${runUrl}`,
+              ``,
+              `While this is failing no regen PR is opened, so the published SDKs`,
+              `silently drift from the OpenAPI specs. Worth fixing promptly rather`,
+              `than letting it accumulate.`,
+            ].join('\n');
+
+            const existing = await github.rest.issues.listForRepo({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open',
+              labels: 'sdk-regen-failure',
+            });
+
+            if (existing.data.length > 0) {
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: existing.data[0].number,
+                body,
+              });
+            } else {
+              await github.rest.issues.create({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                title,
+                body,
+                labels: ['sdk-regen-failure'],
+              });
+            }
diff --git a/.github/workflows/release-on-version-bump.yml b/.github/workflows/release-on-version-bump.yml
new file mode 100644
index 0000000..a671384
--- /dev/null
+++ b/.github/workflows/release-on-version-bump.yml
@@ -0,0 +1,75 @@
+name: Release on version bump
+
+# Closes the gap between "a version bump landed on main" and "that version is
+# on PyPI/npm". Before this, publishing was always a hand-pushed tag, so the
+# weekly regen could regenerate the SDKs but never actually release them.
+#
+# Tags any version on main that has no matching tag yet. The existing
+# publish-coval-sdk.yml / publish-coval-npm.yml workflows trigger on that tag
+# push and do the actual publishing, so the tag stays the record of a release.
+#
+# Requires REGEN_PR_TOKEN (already configured for the regen job). A tag pushed
+# with the default GITHUB_TOKEN does NOT trigger other workflows -- GitHub
+# suppresses that to prevent recursion -- so the publish jobs would never fire.
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - python-sdk/pyproject.toml
+      - typescript-sdk/package.json
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: release-on-version-bump
+  cancel-in-progress: false
+
+jobs:
+  tag:
+    name: Tag unreleased versions
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.REGEN_PR_TOKEN }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+
+      - name: Tag any version that has not been released
+        run: |
+          set -euo pipefail
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+          python_version="$(python - <<'PY'
+          import pathlib
+          import tomllib
+          print(tomllib.loads(pathlib.Path("python-sdk/pyproject.toml").read_text())["project"]["version"])
+          PY
+          )"
+          typescript_version="$(node -p "require('./typescript-sdk/package.json').version")"
+
+          released=0
+          for tag in "python-sdk-v${python_version}" "typescript-sdk-v${typescript_version}"; do
+            if git rev-parse -q --verify "refs/tags/${tag}" >/dev/null; then
+              echo "${tag} is already tagged; nothing to release."
+              continue
+            fi
+            echo "Tagging ${tag}"
+            git tag -a "${tag}" -m "${tag}"
+            git push origin "${tag}"
+            released=$((released + 1))
+          done
+
+          if [ "${released}" -eq 0 ]; then
+            echo "No new versions to release."
+          fi
diff --git a/scripts/bump-sdk-version.py b/scripts/bump-sdk-version.py
new file mode 100755
index 0000000..f9dce3c
--- /dev/null
+++ b/scripts/bump-sdk-version.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python3
+"""Bump the patch version of the Python and/or TypeScript SDK.
+
+Used by the weekly regen workflow so a regenerated SDK arrives already
+releasable. Only touches the hand-maintained manifests and the one pinned
+assertion in the Python tests -- the version strings inside the generated tree
+are derived from pyproject.toml by generate-sdks.sh, so codegen must be re-run
+after this script for them to match.
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import re
+import sys
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+PYPROJECT = REPO_ROOT / "python-sdk" / "pyproject.toml"
+PY_TESTS = REPO_ROOT / "python-sdk" / "tests" / "test_client.py"
+TS_PACKAGE = REPO_ROOT / "typescript-sdk" / "package.json"
+TS_LOCKFILE = REPO_ROOT / "typescript-sdk" / "package-lock.json"
+
+VERSION_RE = re.compile(r"^(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)$")
+
+
+def next_patch(version: str) -> str:
+  match = VERSION_RE.match(version)
+  if match is None:
+    raise SystemExit(f"Cannot bump non-semver version: {version!r}")
+  return f"{match['major']}.{match['minor']}.{int(match['patch']) + 1}"
+
+
+def bump_python() -> str:
+  contents = PYPROJECT.read_text()
+  current = re.search(r'^version = "([^"]+)"', contents, re.MULTILINE)
+  if current is None:
+    raise SystemExit("No version field in python-sdk/pyproject.toml")
+  new = next_patch(current.group(1))
+
+  PYPROJECT.write_text(
+    contents.replace(f'version = "{current.group(1)}"', f'version = "{new}"', 1)
+  )
+
+  # The test pins __version__, so it has to move in lockstep or CI fails.
+  tests = PY_TESTS.read_text()
+  pinned = f'coval_sdk.__version__ == "{current.group(1)}"'
+  if pinned not in tests:
+    raise SystemExit(f"Expected {pinned!r} in {PY_TESTS.name}; version pin moved?")
+  PY_TESTS.write_text(tests.replace(pinned, f'coval_sdk.__version__ == "{new}"', 1))
+  return new
+
+
+def bump_typescript() -> str:
+  package = json.loads(TS_PACKAGE.read_text())
+  new = next_patch(package["version"])
+  package["version"] = new
+  TS_PACKAGE.write_text(json.dumps(package, indent=2) + "\n")
+
+  if TS_LOCKFILE.exists():
+    lock = json.loads(TS_LOCKFILE.read_text())
+    lock["version"] = new
+    if "" in lock.get("packages", {}):
+      lock["packages"][""]["version"] = new
+    TS_LOCKFILE.write_text(json.dumps(lock, indent=2) + "\n")
+  return new
+
+
+def main() -> int:
+  parser = argparse.ArgumentParser(description=__doc__)
+  parser.add_argument("--python", action="store_true", help="bump the Python SDK")
+  parser.add_argument("--typescript", action="store_true", help="bump the TypeScript SDK")
+  args = parser.parse_args()
+
+  if not (args.python or args.typescript):
+    parser.error("nothing to do: pass --python and/or --typescript")
+
+  if args.python:
+    print(f"python-sdk -> {bump_python()}")
+  if args.typescript:
+    print(f"typescript-sdk -> {bump_typescript()}")
+  return 0
+
+
+if __name__ == "__main__":
+  sys.exit(main())