AI for Your Development Process — Not Just Your Code

Bring AI to your development process — not just your code.

Your team already has AI coding tools. OneSquad gives them a process to work from. Specialized AI roles slot into your existing workflow, inside the IDE your team already uses.

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Works with  Claude Code GitHub Copilot Cursor Any LLM
01
Spec
Intent becomes structured Markdown. This is the law.
02
Design & Architecture
UX flows and system boundaries defined before build.
03
Plan
A deterministic plan produced before code is written.
04
Build
Code written strictly against the plan. No guessing.
05
Ship & Validate
Validated against the spec. Operator decides when production is ready.

Intent gets lost between the idea and the code.

Every handoff is a lossy compression. The PM writes a ticket. The developer reads an interpretation. The AI generates code from a vague prompt. By the time something ships, nobody is sure it's what was meant.

Vibe coding made this faster. It did not make it better.

Requirements drift from code within days of shipping
AI-generated code with no architectural integrity
Legacy codebases nobody fully understands anymore
Every PR review is a negotiation, not a verification
Security and compliance gaps found in production
AI coding tools that build fast but don't know what you meant to build
The squad

OneSquad.
Every role covered.

Each specialized AI role owns a phase of your SDLC. Together they form a complete, disciplined team — orchestrated by you, the human operator.

@os-pm
Product Manager
Translates intent into structured specs. Owns the source of truth. Nothing gets built without a spec.
  • Runs discovery and feature scoping
  • Writes precise, testable Markdown specs
@os-architect
System Architect
Designs infrastructure, services, and data boundaries before a line of code is written.
  • Defines the stack and system boundaries
  • Resolves ADRs before build begins
@os-ux
UX Designer
Injects interaction logic and design decisions into specs before build begins.
  • Maps screens, flows, and state behavior
  • Produces UX specs and optional wireframes
@os-tpm
Technical Program Manager
Coordinates execution across personas so work happens in the right order and plan gates are verified before build.
  • Owns tracker truth: done, in progress, blocked, next
  • Runs cross-plan consistency checks before plan gate
@os-dev
Software Engineer
Reads the spec, generates a deterministic plan, then builds. No improvisation.
  • Creates implementation plans before coding
  • Builds task-by-task with tests and sync
@os-sdet
Test Engineer
Tests against spec intent, not against what the developer thought they built.
  • Creates black-box test plans from specs
  • Owns integration and regression coverage
@os-devops
DevOps Engineer
Defines CI/CD pipelines, audit logs, and system telemetry in specs before any infrastructure is provisioned.
  • Provisions cloud infra as code only
  • Automates deployments and observability
@os-finops
FinOps Advisor
Puts a financial model behind every architecture decision so the team can make better trade-offs.
  • Cost forecasting and ROI analysis
  • Architecture cost review and scenario modeling
@os-security
Security Engineer
Audits specs and code for vulnerabilities before anything ships to production.
  • Threat modeling and boundary reviews
  • Policy checks before release
@os-ml
ML Engineer
Defines model specs, training pipelines, and evaluation criteria before any model is built or deployed.
  • Model lifecycle orchestration
  • Evaluation and deployment quality gates
@os-analytics
Analytics Engineer
Owns the "what to measure" layer — sitting between product decisions and the code that instruments them.
  • Defines event taxonomy, metrics, and schemas
  • Specs pipelines and dashboards before any code ships
@os-privacy
Privacy Expert
Reviews features, architecture, and plans for privacy impact — before anything is built or shipped.
  • Privacy impact assessments on specs and designs
  • Compliance verification across build and audit workflows
How it works

Specs live in your repo.
So does your squad.

How it works
AI-native at every step.
Not just the code — the entire SDLC.
Every phase of your product lifecycle is executed by a disciplined AI agent — and governed by a spec. @os-pm captures intent. @os-architect designs the system. @os-ux defines the flows. @os-tpm orchestrates delivery. @os-dev writes the code. @os-sdet tests against spec intent. @os-devops pipelines it. @os-analytics defines what to measure. @os-security audits it. One source of truth. Every agent follows it without exception.
Agentic, not autonomous
Every agent has a role. You have the final say.
Each specialized AI role is disciplined, not autonomous. Agents execute within their phase, hand off to the next, and never bypass the spec. A human operator approves every gate. The squad moves fast — and stays accountable.
Beyond vibe coding
Claude Code is the best engineer you've ever hired. OneSquad makes sure it builds the right thing.
Your AI coding tool writes great code. OneSquad gives it a spec to work from, a plan to follow, and a gate to pass before anything ships. What gets built matches what was approved — every time.
For legacy codebases
No docs? Start from the code.
OneSquad reverse-engineers structured specs from what already exists. Whether it is a two-year-old startup or a twenty-year-old enterprise system — the flywheel starts from wherever you are.
For enterprise
Slots into your existing process.
Keep your Jira, your GitHub, your sprint ceremonies. OneSquad AI roles work inside the IDE your engineers already use. No workflow change required. AI shows up where your team already is.
OneSquad never sees your code. Role instructions are served to your IDE — everything else stays local.
"We went from vibe coding to shipping with architectural integrity. The spec is the law — and nothing gets built without one."
— OneSquad early access team
"The squad is who gets the work done. The spec is how they stay accountable."
— OneSquad early access team
See it in Action
OneSquad SDLC Flow Five-phase SDLC flywheel with consistent phase styling, operator gates, and a loop back to phase 1. OneSquad SDLC Flow SPEC > DESIGN > PLAN > BUILD > SHIP > REPEAT PHASE 1 Spec @os-pm turns intent into a Markdown spec. No build begins until the spec is approved. Operator PHASE 2 Design & Architecture @os-ux defines screens and interaction flows. @os-architect sets system boundaries. Specs and ADRs are the output — not code. Operator PHASE 3 Plan @os-tpm coordinates the build plan. @os-dev, @os-sdet, @os-devops each produce their plan against the approved spec. Conflicts surface here — not mid-build. Operator PHASE 4 Build Each role builds strictly in their lane. @os-dev codes. @os-sdet writes tests. @os-devops provisions infrastructure. The spec is the law — no requirement drift. Operator PHASE 5 Ship & Validate @os-devops pushes to lower environments. @os-sdet validates against the spec. Operator decides when production is ready. Operator spec.md ## Feature: User Authentication Status: Approved Roles: @os-pm @os-architect ### Acceptance Criteria - [ ] User can sign in with GitHub - [ ] Session persists on refresh - [ ] Invalid token returns 401 Source of Record

OneSquad runs in five phases: Spec, Design & Architecture, Plan, Build, and Ship & Validate. Each phase has one output and one gate. The operator approves the output before the next phase begins. No agent skips a phase. No requirement drifts mid-build. The spec written in Phase 1 is the same spec the code is validated against in Phase 5.

At the center, every decision, spec, and plan is captured in Markdown files — the single source of record. These .md files live with the codebase, stay version-controlled in Git, and give every role and the Operator shared, auditable context at every gate.

Built with OneSquad

OneSquad was built using OneSquad.
This is what it produced.

Repo structure
onesquad/
├── plans/features/
├── bru-5-initial-overview-question-flow/
├── coding-plan.md
├── infra-plan.md
├── test-plan.md
└── tracker.md
├── bru-6-download-entire-project/
├── bru-9-design-system/
├── bru-10-architecture/
└── bru-31-additional-context/
├── specs/features/
├── bru-5-initial-overview-question-flow/
├── spec.md
└── ux.md
├── bru-8-collect-product-name/
├── bru-18-freemium/
└── bru-24-ui-improvements/
├── specs/architecture.md
├── specs/design-system.md
└── specs/overview.md
Every feature specced before it was built. No exceptions.
v1 by the numbers
12
features shipped
20+
requirements & UX specs
60K
lines of code
3
days to build
90%
test automation coverage
42
deployments
A traditional full-stack squad — PM, architect, UX, and engineers — would need 4–6 weeks to spec, design, and build the same product. OneSquad did it in 3 days — solo.
Every feature had a spec before a single line of code was written
Every plan was approved by a human before build began
Full CI/CD with unit, integration, and regression tests from day one
Production-quality code — not a prototype

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