Platform
Everything a build needs to be worth trusting six weeks later
The landing page shows four things. This is all of it — the builder, the supply-chain record, the observability layer, and the controls a security team will ask about before this becomes the path to production.
01
Builder
How a build is executed, and why it produces the same bytes twice.
Hermetic sandboxes
Every build declares its inputs and runs with nothing else mounted. Ambient state — an environment variable, a globally installed toolchain, yesterday's node_modules — cannot reach it, which is what makes the output a function of the inputs rather than of the machine.
Content-addressed caching
Results key on the hash of the full input closure, so a cache hit is a proof of equivalence rather than a guess based on a lockfile timestamp. Shared across branches, CI and laptops.
Remote execution
Fan a build graph across the pool and get the same artifact you would have got locally. The scheduler is aware of the cache, so it never dispatches work whose result is already known.
Incremental by graph, not by folder
Girder rebuilds what actually depends on what changed. A one-line edit in a leaf package does not rebuild the monorepo, and a change to a shared type does not skip the twelve services that use it.
02
Supply chain
The record that says where an artifact came from, and who let it through.
Signed provenance
Every artifact carries an in-toto style attestation: source commit, resolved dependency closure, builder identity and the sandbox it ran in, signed at the moment of production and verifiable without us.
Promotion approvals
Environments are gated by policy rather than by convention. Promotion to production requires the attestation to verify, the policy to pass and, where you ask for it, a named human — recorded against the artifact, not against a chat message.
Policy as configuration
Rules written against properties of the artifact — unsigned dependency, license class, known advisory, unreviewed base image — version-controlled alongside the code and testable against historical builds before they ship.
One-command rollback
Because the artifact and its full closure are addressed by content, going back is re-pointing an environment at a hash that already exists. No rebuild, no hoping the old commit still compiles.
03
Observability
Why this build was slow, and why that one only fails on Tuesdays.
Critical-path timelines
Every action in the graph with its queue time, execution time and cache status, so a slow pipeline resolves to the specific target on the critical path instead of to a general feeling.
Cache-hit attribution
Hit rate broken down by target, branch and toolchain version. The single number that tells you whether a build config change helped or quietly invalidated everything downstream.
Flake detection
Identical inputs producing different results is detectable when inputs are hashed. Girder flags the non-deterministic target rather than leaving a team to re-run CI until it goes green.
Full input capture
The resolved closure of every build is retained alongside its output. The only artefact that makes a six-week-old failure reproducible on a laptop.
04
Security & compliance
What the review board asks for, answered before they ask.
Tamper-evident history
Append-only, hash-chained, exportable, and legible to an auditor who does not work on your platform team. Written for the room where a deploy has to be explained.
SSO, SCIM and RBAC
SAML and OIDC single sign-on, directory-synced provisioning, and role-based access down to individual projects and environments.
Build residency
Pin execution and artifact storage to a region, or run the runner fleet entirely inside your own account with the control plane hosted.
Customer-managed signing keys
Bring your own KMS. Girder never holds the private half, and an attestation your keys signed remains verifiable if you stop paying us.
Seal one service and see.
Run Girder beside your pipeline for a week and compare the artifact hashes. If they don't match, you have learned something worth knowing either way.
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