## Summary
Several optional workflow jobs fail on forks and private mirrors that
lack org-specific secrets or registry permissions. This adds per-job
repository-variable gates so those deployments can switch them off
without editing workflows — matching the pattern from #3901
(`ENABLE_CLAUDE_CODE` / `ENABLE_WORKFLOW_SECURITY_SCAN`).
Two variables, both **default-enabled** (a job runs unless its variable
is explicitly `'false'`), so canonical-repo behaviour is unchanged where
the variables are unset:
**`ENABLE_HELM_PRERELEASE`** — gates the chart-publish jobs that push to
`oci://ghcr.io/<owner>/charts` (needs `write_package` on the owner's
charts namespace):
- `helm-prerelease.yml` → `prerelease` job
- `release-helm.yml` → `release` job
Without the permission these fail with `403: denied: permission_denied:
write_package` on every PR / `helm-v*` tag. The `lint-and-test` jobs
(lint + template + kubeconform, no push) always run, so chart validity
is still enforced everywhere.
**`ENABLE_DEPENDABOT_ALERTS`** — gates the Dependabot notifier crons
that need `DEPENDABOT_ALERTS_TOKEN` / `SLACK_BOT_TOKEN` and post to a
specific Slack:
- `dependabot-critical-alerts.yml` → `alert` job (daily cron)
- `dependabot-weekly-summary.yml` → `summary` job (weekly cron)
On a fork/mirror these otherwise fire on schedule and fail (or post
nowhere) indefinitely.
## Test plan
- Variables unset (default): all jobs run as today.
- `ENABLE_HELM_PRERELEASE=false`: helm `lint-and-test` runs, publish
jobs skip — no 403 on repos lacking `write_package`.
- `ENABLE_DEPENDABOT_ALERTS=false`: the two cron jobs skip cleanly
(neutral, not failed).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Daniel Sutton
1cf56e5d29