o11y
Copyright (c) 2026 Hanzo AI, Inc.

This product includes software from SigNoz (https://github.com/SigNoz/signoz),
licensed under the MIT Expat license:

    Copyright (c) 2020-present SigNoz Inc.

Forked from https://github.com/SigNoz/signoz (SigNoz core, MIT Expat), synced
to upstream main at commit 3e6339019. The import history was squashed, so the
repository root commit is a Hanzo branding commit rather than the upstream
commit history.

Only the MIT Expat-licensed portions of SigNoz are used here. SigNoz's
source-available "ee/" and "cmd/enterprise/" code (governed by the separate,
non-OSS SigNoz Enterprise License) is NOT included in this repository and is
never redistributed.

DEVIATIONS

The following changes distinguish this distribution from upstream SigNoz. They
are recorded for provenance and do not alter the MIT Expat license terms above.

* Product rebranded to "o11y" (Hanzo o11y): Go module github.com/hanzoai/o11y,
  frontend package @hanzo/o11y, served title "Hanzo O11y", Hanzo logo and icon.
* The SigNoz "ee/" and "cmd/enterprise/" directories (SigNoz Enterprise License,
  non-OSS) are excluded entirely; this is an MIT Expat-only core distribution.
* Upstream Go modules renamed to Hanzo forks: SigNoz/signoz-otel-collector ->
  github.com/hanzoai/otel-collector, SigNoz/govaluate -> github.com/hanzoai/govaluate.
* github.com/expr-lang/expr is consumed via a go.mod replace directive pointing
  at github.com/hanzoai/expr.
* The ClickHouse mock and SQL builder/parser dependencies are flipped to the
  hanzo-ds/* forks (hanzo-ds/go, hanzo-ds/mock, hanzo-ds/sqlbuilder, hanzo-ds/sqlparser).
* Telemetry storage is debranded: the legacy signoz_* ClickHouse databases and
  their signoz_-prefixed tables are renamed to o11y_* identifiers
  (deploy/datastore/migrations/0001_rename_signoz_to_o11y.sql).
* Native Hanzo IAM authorization is added (pkg/authz/iamauthz) with per-request
  org scoping via the X-Org-Id header derived from the JWT.
* Native Hanzo API surfaces are added under pkg/apiserver/o11yapiserver,
  including error tracking, LLM observability, Sentry-compatible ingest, and a
  community embed accessor.
* The service runs behind the Hanzo gateway and mounts as the o11y subsystem of
  the unified cloud binary per HIP-0106.
* Operator-facing environment variables and configuration keys are Hanzo-branded
  rather than SigNoz-branded.