The Agent Stack

Layer 1

Orchestration

Run multiple agents in parallel. Manage workspaces, branches, and task assignment.

Conductor

Parallel Claude Code and Codex agents in isolated workspaces. Mac app.

Superset

Run 100s of coding agents. Remote workspaces. Any CLI agent.

Claude Squad

Terminal-based orchestration. Open source. tmux under the hood.

Kilo Code

Agent Manager, cloud agents, webhooks. 3M+ users.

Composio AO

Dashboard + autonomous CI fix. Open source orchestrator.

amux

Terminal multiplexer for coding agents. Lightweight, keyboard-first.

Layer 2

Code Generation

Agents that write, refactor, and ship code.

Claude Code

Anthropic's agentic coding tool. Terminal-native. MCP support.

Codex

OpenAI's cloud coding agent. Sandboxed. Parallel tasks.

Copilot

GitHub's AI pair programmer. Coding Agent ships PRs autonomously.

Cursor

AI-first editor. Background agents. Composer for multi-file edits.

Factory

Enterprise Droids. Coordinator architecture. $1.5B valuation.

Devin

Autonomous software engineer by Cognition. Full environment access.

Layer 3

Code Review

Review what agents wrote. Single-PR analysis, style, bugs, security.

Greptile

AI code review with full codebase context. YC W24.

CodeRabbit

Automated PR review. Line-by-line feedback. Free for open source.

Ellipsis

AI code review and bug fixes. Auto-fix PRs.

CodiumAI

Test generation and code integrity. Analyzes code behavior.

Layer 4

Cross-Branch Verification

Check whether open branches are compatible with each other before merge. The layer nobody else covers.

You are here

Rosentic

Deterministic cross-branch compatibility detection. 12 languages, full-stack. Checks every PR against every active branch. Code never leaves your infrastructure.

Code review checks one PR. Rosentic checks the PR against every other open branch.

Layer 5

Observability

Monitor what shipped. Trace errors, performance, and incidents in production.

Honeycomb

Observability for distributed systems. Debug production fast.

Datadog

Infrastructure monitoring, APM, logs, security. Enterprise scale.

Sentry

Error tracking and performance monitoring. Developer-first.

Traversal

AI SRE agent. Root cause analysis across petabyte-scale systems.

PostHog

Product analytics, session replay, feature flags. Open source.

Layer 6

Merge & Deploy

Get verified code to production. CI/CD, merge queues, and deployment platforms.

GitHub Actions

CI/CD built into GitHub. Workflows, runners, marketplace.

Mergify

Merge queue and automation. Sequential validation before merge.

Aviator

Merge queue and CI optimization. Parallel testing.

Graphite

Stacked PRs and merge queue. Fast code review workflow.

Vercel

Frontend deployment platform. Preview deployments on every PR.

The missing layer