§ 02 · Domain mastery

DevOps & CI/CD

Pipelines that pass a real audit, ship daily, and roll back in seconds.

Delivery infrastructure that behaves like production: trunk-based flow with mandatory previews, signed artifacts and provenance, canary and blue/green rollouts, and a rollback path we've actually used. Security is wired into the pipe so releases are safe by default, not by heroics.

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§ I

Pillars

01

Trunk-based with previews

Short-lived branches, mandatory ephemeral preview environments per PR, and merge queues that keep main green without human air-traffic control.

02

Signed, provable artifacts

SLSA-aligned build provenance, SBOM per release, cosign signatures verified at deploy. Audit questions become one SQL query, not a fire drill.

03

Progressive delivery

Canary, blue/green, and feature-flag rollouts backed by real SLO gates — not vibes. Rollbacks measured in seconds, not incidents.

04

Secrets & key rotation

Short-lived credentials, workload identity federation, and rotation on a schedule the auditor sees. No .env files in the repo, ever.

05

Policy as code in the pipe

OPA/Conftest gates block the classes of mistake that used to require a war room. Policy is versioned, reviewed, and shipped with the app.

06

Cost- and time-aware CI

Cached layers, split test matrices, and self-hosted runners where they pay off. CI is treated as a product with its own SLO and budget.

§ II

Domain vocabulary

The words that separate insiders from readers.

SLSASupply-chain Levels for Software Artifacts. Naming a level (usually 3) signals you've done more than run `docker build`.
Merge queueSerializes PRs against the latest main before merging. Teams that skip it accumulate broken-main incidents nobody wants to own.
Change failure rateThe DORA metric that actually predicts whether a team should ship faster or slow down. Insiders track it monthly.
Ephemeral previewA full stack per PR, torn down on close. Different from a staging environment — and cheaper if you built it right.
Cosign / SigstoreKeyless artifact signing. Used correctly, it removes 'was this really our build?' from the incident checklist.
Runbook driftThe gap between what the runbook says and what oncall actually types. Where every 3 AM incident lives.
OIDC to cloudShort-lived cloud credentials issued to CI via OIDC. Teams still storing long-lived AWS keys in secrets are one leak from Reddit.
Deployment frequencyBoring on its own; damning when paired with change failure rate and lead time. The three form the DORA trap.
§ III

Open problems we help with

§ IV

What we ship

  1. 01A trunk-based flow with merge queues and required checks per repo.
  2. 02Ephemeral preview environments wired to your platform.
  3. 03Signed builds with SBOMs published on every merge.
  4. 04Canary and blue/green rollouts with automated rollback triggers.
  5. 05Policy-as-code gates for the classes of mistake you keep hitting.
  6. 06A DORA dashboard the team and the CFO can both read.
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