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An AI SRE that fixes what it finds.

Polylane does an SRE's work: it learns your system, reviews changes, handles incidents, fixes bugs and keeps CI green.

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Learn

It learns your system before anything breaks

Polylane connects your clouds, repos and observability tools into one context graph, so it knows what depends on what before something goes wrong.

Start connecting
Topology
Search your cloud resources...
Galaxy
checkout-edge Worker
Critical Critical to your architecture.

Issue hotspot: 4 issues in the last 7 days

Change hotspot: 12 changes in the last 7 days

Cloudflare · coreplane · earth · Compute
hd-prod Hyperdrive
Critical Critical to your architecture.

Change hotspot: 7 changes in the last 7 days

Cloudflare · coreplane · earth · Databases
ingest-events Lambda function
Standard Important to your architecture.

Issue hotspot: 2 issues in the last 7 days

AWS · coreplane-prod · us-east-1 · Compute
payments-db Database
Critical Critical to your architecture.

Issue hotspot: 1 issue in the last 7 days

Change hotspot: 3 changes in the last 7 days

PlanetScale · coreplane · us-east · Databases

Prevent

It reviews changes before it ships

Every pull request is checked against the production it deploys to. If it would break something, Polylane says why before you merge.

Start analysing
github.com/coreplane/orders-api/pull/482

Add trigram index for order search #482

Open rvidal wants to merge 1 commit into main from order-search-trgm
Conversation 1 Commits 1 Checks 2 Files changed 1
polylane bot commented 2 minutes ago ···
Caution

Merging this pull request may degrade production (high impact).

Merging this blocks every write to orders while the index builds. migrations/0114_order_search_trgm.sql:3 adds CREATE INDEX … USING gin (search_text gin_trgm_ops) without CONCURRENTLY, and a plain CREATE INDEX takes a full write lock on orders for the whole build. Checkout sustains ~38 writes/s on that table; each one queues behind the lock until the build finishes.

To make this safe: build the index with CREATE INDEX CONCURRENTLY outside the transactional migration.

orders-db · writes per second · last 48h
0 20 40
-48h -24h now
every one of these writes blocks while the index builds

Polylane analysed de91b47 for production impact.

Some checks were not successful 1 failing and 1 successful check
ci / test Successful in 2m 4s Details
Polylane production impact Non-concurrent index build locks writes on orders Details
Merging is blocked

Respond

It handles incidents while you sleep

Every alert is checked, repeats are grouped, and real incidents are investigated with the evidence attached.

Start triaging
Issues Elevated error rate on payments-api Timeline

Elevated error rate on payments-api

High Confirmed ·Detected from a Datadog alert
OverviewMetricsLogsTracesTimelinePropertiesInvestigation
  1. 02:14:07 Alert received

    Datadog · payments-api error rate · occurrence #1

  2. 02:14:58 Triaged as an incident

    Severity high. Error rate 41× the 30-minute baseline, clustered on POST /v1/charges; deploy f3a9c12 landed 18 minutes before the firing.

  3. 02:15:02 Fix run started

    The same agent that triaged it keeps working it.

  4. 02:31:44 Alert fired again (occurrence #2)

    Folded into this issue after 16 quiet minutes, and handed to the investigation already running.

  5. 03:06:12 Alert recovered

    Provider recovery received. Issue resolved.

Fix

It turns bug reports into fixes

Hand it a bug report and it proves the cause before it writes the fix, or passes the work to Devin, Cursor or Factory.

Start fixing
Critical latency degradation in checkout-edge worker Timeline
  1. 02:02:31 Fix run started

    One agent, from the signal to the pull request.

  2. 02:16:41 Causal chain
    Signal (metric)

    workers.invocation.p99_latency · checkout-edge

    Surfacing site

    checkout-edge at coreplane/checkout-edge:src/hyperdrive/pool.ts#withConnection

    Mechanism

    withConnection waits for a free slot before it runs the query, so the P99 carries pool queue time, not database time

    Producer

    hd-prod, at coreplane/checkout-edge:wrangler.jsonc#hyperdrive

    • Producer evidence
    • queue-depth histogram grouped by colo: p99 wait 1.31s at 5 connections in flight, 0.04s below
    • sandboxGrep: max_connections is 5 on the hd-prod binding; the worker opens up to 50
    • change record 9f3c2a1: max_connections 50 → 5
    Trigger

    deploy 9f3c2a1 took max_connections from 50 to 5, 18 minutes before the first breach

    What happens to the failed unit today

    unknown: whether the storefront retries the confirm: coreplane/storefront-web is not a connected repository

    Cadence check

    one queued request per checkout past the fifth in flight matches the 118 breaches and the gaps between evening peaks

    Blast radius

    2 other resource(s), 0 other tenant(s); data at risk: none named

    Every link rests on named evidence, or is written as unknown: <what would establish it>. Counts, not adjectives. If the cause isn't proven, no fix ships.

  3. 02:24:09 Pull request #412

    Restore Hyperdrive pool size in checkout-edge

Build

It keeps CI green when main breaks

When a build fails on main, Polylane finds the commit that broke it and writes the fix.

Connect your CI
Issues ci / build failing on main Timeline

ci / build failing on main

Medium Confirmed ·Detected from a GitHub Actions run
OverviewMetricsLogsTracesTimelinePropertiesInvestigation
  1. 14:02:11 Alert received

    GitHub · ci / build failed on main · run #1842

  2. 14:02:40 Triaged as an incident

    tsc fails in orders/api.ts: it still imports formatPrice from utils/price, which a3f9c21 (#1287) moved to money/format.ts four minutes earlier.

  3. 14:02:44 Fix run started

    The same agent that triaged it keeps working it.

  4. 14:09:30 Pull request opened

    #1291 Import formatPrice from money/format in orders/api

  5. 14:21:05 Alert recovered

    ci / build passed on main. Issue resolved.

Built to be trusted with production.

Evidence behind every claim

Every conclusion links to the query, log line or deploy that supports it, or says what is still unknown.

Read-only until you say so

Accounts connect read-only. Write calls are refused until you turn read-only off for that account.

Nothing to tune

Built-in checks learn what normal looks like for every provider you connect.

Not another pager

It tells you in Slack, email and the console, with the investigation already done.

Works with your coding agent

Polylane writes fixes itself, or hands them to Devin, Cursor or Factory.

Sharper every week

It remembers what it confirms and keeps daily notes, so each issue makes the next one faster.

It plugs into what you already run.

Loved by developers

Jason @Jasonpraful When I installed polylane for the first time my expectations were pretty low. Couple weeks in I’m speechless - it just works everything is all of a sudden fully autonomous Jarod Stewart Conspire, on Product Hunt I use Polylane across my AWS and Vercel accounts. It has been really great at automatically fixing errors that happen before I even notice them from Sentry. Dhravya Shah @DhravyaShah there was something wrong with our docs deployment, and Polylane automatically found and notified us about it... insane stuff @boristane Vitor Balocco Runlayer, on Product Hunt It fixed something like 5 mins in after we set it up. It not only helps with on-call investigations, it's also pro-active about improving issues in CI, like flaky tests, hardening against transient errors, etc. Great product! Brenton West @west_brent34411 @boristane - It is launch week for me and as I was testing Prod, started to notice things were not flowing like they did in Dev. Following @polylane for months & knowing I would try it when the time was right, I gave it a go. Issue Instantly ID. I was NOT disappointed. 🧑‍🍳💋 Kyle Galbraith Depot, on Product Hunt We've been using Polylane at Depot for a few weeks now. I've never seen anything like it. I think we merged 10 PRs in the first hour it was running. Things will never be the same. A very awesome team to work with as well.

Related guides

All incident response guides

Common questions.

What is an AI SRE?

An AI SRE does the operational work of keeping production healthy: it watches your systems, triages alerts, investigates issues and fixes them. Polylane does all four and shows the evidence for each conclusion.

Does an AI SRE replace my on-call rotation?

It takes the first pass at everything, so people step in only when something needs a decision. Polylane isn't a pager: it tells you by email, Slack and the console, and each issue arrives already investigated.

Is it safe to give an AI SRE access to production?

Accounts connect read-only, and write calls are refused until you turn read-only off for that account. Code changes go through your normal review.

How is an AI SRE different from an observability tool?

Observability tools store your telemetry and show it to you. Polylane reads it, decides what matters, finds the cause and writes the fix.

Does it only diagnose, or does it fix too?

It fixes too. Once the cause is proven, Polylane writes the fix and tests it, ready for your review.

Do I have to set thresholds?

No. Polylane judges each signal against how that resource normally behaves at that hour on that day, and assumes nothing is wrong until the data says otherwise.

Will it wake me for a blip?

No. A change has to be big, sustained and heading the wrong way, and repeats fold into one issue.

What happens to an alert it dismisses?

It's kept with its reasoning, and one click sends it back for investigation. An alert that fires again gets triaged again instead of dismissed twice.

More use cases

Sleep through the night. Polylane is watching production.