Reference

Configuration, build tags, and dependencies. The detail that doesn't fit on the conceptual pages.

Page	Contents
Configuration	datadog.yaml, system-probe.yaml, environment variables, runtime-changeable settings.
Dependencies	Build tags, Go modules, third-party licenses, language ecosystems.

Source-of-truth files

If you need authoritative information, these files in the repo are the canonical sources:

File	What it contains
pkg/config/setup/config.go	Default values for every datadog.yaml key.
pkg/config/setup/system_probe.go	System Probe defaults.
tasks/build_tags.py	Computed build tags per binary, per platform.
modules.yml	List of Go modules in the repo.
release.json	Release version metadata.
flakes.yaml	Known-flaky tests excluded from CI.
LICENSE-3rdparty.csv	Every direct and indirect dependency, with license.
.golangci.yml	Go linting configuration.
.copyright-overrides.yml	Copyright header exemptions.
mkdocs.yml	Developer documentation site configuration.

Generated artifacts

Many parts of the codebase are generated. The relevant generators:

Generator	Output	How to run
comp/README.md	Component catalog	dda inv collector.generate
*_mock.go	Test mocks	per-task; .mockery.yaml config
*.pb.go	Protobuf	dda inv protobuf.generate
*_easyjson.go	JSON encoders	go generate in the directory
pkg/ebpf/.../*_linux.go	cgo godefs types	bazel run //pkg/ebpf:types_godefs
agent createschema	Config schema dump	./bin/agent/agent createschema

Where to find things

Quick lookup table for things people regularly want to find:

Looking for…	Look in…
All agent <subcommand> implementations	cmd/agent/subcommands/
Component definitions and Fx wiring	comp/<bundle>/<component>/
The list of build tags	tasks/build_tags.py
Default config values	pkg/config/setup/
CWS rules and SECL grammar	pkg/security/secl/
eBPF C source	pkg/ebpf/c/, pkg/network/ebpf/c/, pkg/security/ebpf/c/
Bazel rules	bazel/rules/, BUILD.bazel files
Invoke tasks	tasks/<module>.py
GitHub Actions	.github/workflows/
GitLab CI	.gitlab-ci.yml, .gitlab/
Release notes	releasenotes/notes/, releasenotes-dca/notes/
Public docs (rendered to datadoghq.dev)	docs/public/
Internal/dev docs	docs/dev/
Skills for AI agents	.claude/skills/
Bundled Python integrations	cmd/agent/dist/checks/
The CHANGELOG	CHANGELOG.rst (~730 KB)

Related pages

• Configuration — config knobs.
• Dependencies — build tags and modules.
• How to contribute: Tooling — dda inv and Bazel.