ENGINEERING
GitLab MR Burn-Rate Gate with Inline Math Comment
On GitLab merge request events, reads the target service's Honeycomb error-budget burn and either approves the MR or posts a blocking discussion note with the full burn…
How it runs
The automated pipeline, trigger to output.
- TriggerGitLab merge request created or updatedGitLab
- ActionQuery service SLO burn rate from HoneycombHoneycomb
- LogicEvaluate burn multiplier vs block threshold
- ActionApprove MR or post blocking discussion note with mathGitLab
- OutputMR mergeable state reflects gate verdictGitLab
What it does
Brings the Honeycomb burn-rate gate to GitLab. When a merge request is created or pushed to, it queries the affected service's SLO burn rate, then either records an approval or opens a blocking discussion note containing the exact numbers: budget consumed, remaining minutes, burn multiplier, and the threshold it tripped. Reviewers and authors see precisely why a merge is being held.
When to use it
Use it on GitLab repos where a service has a Honeycomb SLO and you enforce merge approvals. It removes the guesswork of "is now a safe time to ship" by tying the decision to live budget data instead of intuition.
How it works
- 1A GitLab merge request hook fires on create or update.
- 2The flow resolves the service from the MR's project or labels and pulls its SLO burn rate from Honeycomb.
- 3A logic step evaluates the burn multiplier against your block threshold.
- 4If healthy, it posts an approval; if hot, it opens a blocking discussion note with the burn math.
- 5The MR's mergeable state reflects the gate verdict.
Set it up
What you configure once, before turning it on.
- 1Connect GitLabRepos, MRs, pipelines, registry.
- 2Connect HoneycombDistributed traces and queries.
- 3Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 4Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 5Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
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