One API call, one whole engineering team, allegedly

What it does

SWE-AF is an autonomous engineering team runtime built on the AgentField control plane. You hand it a natural-language goal plus a repo (or several repos with primary/dependency roles), and it spins up a pipeline of PM, architect, coder, reviewer, QA, merger, and verifier agents that decompose the work, code it in isolated git worktrees, and open a finished PR. It runs on Claude Code, OpenCode, or Codex backends, with a flat config map assigning different models per role.

The interesting bit

The architecture is three nested control loops: an inner loop where coders retry on QA failure, a middle loop where an advisor re-approaches, splits, or accepts with tracked debt, and an outer loop where a replanner restructures the remaining dependency DAG. Hard issues trigger replanning rather than blind retries — the strategy lives in the control stack, not the prompts.

Key highlights

• Multi-repo builds with primary and dependency roles; dependency failures are captured but don’t block the build
• Continual learning: conventions and failure patterns from early issues get injected into later ones (enable_learning)
• Checkpointed execution with resume_build after crashes
• Explicit compromise tracking — relaxed scope becomes typed, severity-rated debt
• Real-world example: PR #179 on AgentField, 10/10 issues, 217 passing tests, 79 agent invocations, $19.23 total on haiku-class models

Caveats

• The headline benchmark (“253.8x faster”) compares CPython subprocess spawning against a pre-warmed in-process RustPython pool — a real tradeoff, but the framing flatters the result
• Public beta; requires the AgentField control plane and a provider API key, so it’s a stack, not a single tool
• The 175-agent RustPython compiler example is impressive but hard to independently verify from the README alone

Verdict

Worth a look if you’re experimenting with multi-agent engineering pipelines and want DAG-level replanning instead of a single coder loop. If you just want a coding agent for one file, this is a factory where a screwdriver would do.