The charter file carried a tool-specific name while being the repository's own document: mission, non-negotiable constraints, the pinned stack, repo conventions and phase status, cited as authority by thirty files across the agent, api, deploy, docs, search and terraform trees. PROJECT-SPEC.md says what it is. All 42 references are updated in the same commit, including the relative link in docs/status.md, so nothing points at a filename that no longer exists.
proto
Shared .proto contracts. Source of truth for the agent↔ingest gRPC
service; each language generates its own bindings from these files rather
than sharing generated code across languages.
sentry/logs/v1/logs.proto—LogIngest.PushBatch, the data-plane RPC an agent calls to ship log records.sentry/agent/v1/agent_control.proto—AgentControl.CheckIn, the control-plane RPC an agent calls (on its own heartbeat ticker, same push-not-pull posture) to report its config and fetch any remote override -- see /docs/agent-management-design.md. Same mTLS connection/listener asLogIngest, a second service on it rather than a second protocol.
Go bindings
Go is the one language here with pre-generated, checked-in bindings
(sentry/logs/v1/logs.pb.go, logs_grpc.pb.go), living in this directory
as its own module (github.com/cairnobs/cairnobs/proto) that /ingest and
/api depend on via a local replace directive in their go.mod. Rust
(/agent) instead generates its bindings at build time via tonic-build
(see agent/cairnobs-agent/build.rs) — no checked-in Rust output.
To regenerate the Go bindings after changing either .proto file:
go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
cd proto
protoc --go_out=. --go_opt=paths=source_relative \
--go-grpc_out=. --go-grpc_opt=paths=source_relative \
sentry/logs/v1/logs.proto sentry/agent/v1/agent_control.proto
go build ./...