Does Tessary fix the regression itself?

It proposes the fix, and a person ships it. Once RCA has named the cause, it opens a pull request against the connected repo with the change it believes corrects the problem, alongside the report: the hypotheses the investigation could support, the checks it ran and ruled out, and the files it points to. Nothing merges on its own, so the last call is always a review by someone on your team.

The investigation runs in an isolated session, working from the case’s trace evidence and the code to test explanations against what actually happened. Where nothing clears the bar, the report says so instead of guessing, and “no change located” is a valid outcome.

Two limits worth knowing. Without a connected repo there is no pull request, only the report. And a proposed fix is an argument from evidence, not a guarantee, which is why it arrives as a PR rather than a deploy.

keep reading

More on this.

Does Tessary need access to my repo to find the root cause?Not strictly. RCA reads a connected repo when you give it one, but an evidence-only investigation still runs and completes, with a stated ceiling.answer →Is RCA turned on by default?No. RCA ships off. A person starts it on a case, and on a self-hosted install its model calls run on the provider key your org supplied.answer →What happens after Tessary confirms a case?The case reaches a person, and root-cause analysis is theirs to start on it: an isolated investigation over that case's evidence, ending in a report.answer →Everything on tessary RCAThe definition, and every question answered under tessary RCA.concept →

Two ways to run Tessary.

Tessary is an open-source agent reliability platform. Cloud and self-hosted run the same workflow on the OpenTelemetry traces your agent already emits.

Tessary Cloud

We host it for you. Send your first trace with nothing to deploy and no model key.

what's includedper organization
traces
10,000 per calendar month
stored trace data
1 GB
retention
30 days
model credit
$10, one-time, for triage and root-cause analysis
credit card
not required
start for free

Self-hosted Tessary

Run the open-source code on your own infrastructure with one command. Add your own model key for triage and root-cause analysis.

Self-host Tessary for me by following https://github.com/tessaryai/tessary/blob/main/setup.md

docker compose -f oci://docker.io/tessaryai/tessary:compose up -d -y