ENGINEERING

On PR merge, baseline its query paths so future slowdowns are traceable

When a PR merges this records a Honeycomb latency baseline for the query paths it touched and annotates the GitHub PR, so any later regression can be attributed back to this…

CategoryEngineering
Enginesim
Difficultyintermediate
Triggerevent
Steps4
Setup~15 min

How it runs

The automated pipeline, trigger to output.

  • TriggerGitHub pull request mergedGitHubGitHub
  • LogicIdentify touched query paths; skip if none monitored
  • ActionCapture current latency baseline from HoneycombHoneycomb
  • OutputComment the baseline back on the GitHub PRGitHubGitHub

What it does

Makes future regression hunting cheap by capturing evidence at merge time. When a PR merges, it snapshots current Honeycomb latency for the query paths that PR touches and writes that baseline back onto the PR — so when latency drifts later, the offending change is already documented.

When to use it

Use it on repos where deploys batch many PRs and after-the-fact attribution is painful. Establishing a per-PR query baseline up front turns a guessing game into a lookup.

How it works

  1. 1A GitHub pull-request-merged event triggers the flow.
  2. 2It inspects the diff to identify which query paths or migrations the PR touches.
  3. 3A logic step skips PRs that touch no monitored query paths.
  4. 4It queries Honeycomb for the current latency baseline on those paths.
  5. 5It posts the captured baseline as a comment back on the merged GitHub PR.
  6. 6It records the PR-to-query mapping so later regression flows can attribute fast.

Set it up

What you configure once, before turning it on.

  1. 1
    Connect GitHubRepos, issues, pull requests, actions.
  2. 2
    Connect HoneycombDistributed traces and queries.
  3. 3
    Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
  4. 4
    Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
  5. 5
    Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.

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