SWE-AF

Autonomous Engineering Team Runtime Built on AgentField

Pronounced: "swee-AF" (one word)

One API call → full engineering team → shipped code.

One API call spins up a full autonomous engineering team — product managers, architects, coders, reviewers, testers — that scopes, builds, adapts, and ships complex software end to end. SWE-AF is a first step toward autonomous software engineering factories, scaling from simple goals to hard multi-issue programs with hundreds to thousands of agent invocations.

One-Call DX

Trigger it with the af CLI (requires af ≥ 0.1.87) — it streams live progress and prints the result:

af call swe-planner.build --in '{
  "goal": "Refactor and harden auth + billing flows",
  "repo_url": "https://github.com/user/my-project",
  "config": {
    "runtime": "claude_code",
    "models": { "default": "sonnet", "coder": "opus", "qa": "opus" },
    "enable_learning": true
  }
}'

Prefer raw HTTP? Hit the API directly with curl:

curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Refactor and harden auth + billing flows",
    "repo_url": "https://github.com/user/my-project",
    "config": {
      "runtime": "claude_code",
      "models": {
        "default": "sonnet",
        "coder": "opus",
        "qa": "opus"
      },
      "enable_learning": true
    }
  }
}
JSON

Swap models.default and any role key (coder, qa, architect, etc.) to any model your runtime supports.

Operating Modes

SWE-AF works in two modes: point it at a single repository, or orchestrate coordinated changes across multiple repos in one build.

Single-Repository Mode

The default. Pass repo_url (remote) or repo_path (local) and SWE-AF handles everything:

curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d '{
    "input": {
      "goal": "Add JWT auth",
      "repo_url": "https://github.com/user/my-project"
    }
  }'

Multi-Repository Mode

When your work spans multiple codebases — a primary app plus shared libraries, monorepo sub-projects, or dependent microservices — pass config.repos as an array with roles:

curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d '{
    "input": {
      "goal": "Add JWT auth across API and shared-lib",
      "config": {
        "repos": [
          {
            "repo_url": "https://github.com/org/main-app",
            "role": "primary"
          },
          {
            "repo_url": "https://github.com/org/shared-lib",
            "role": "dependency"
          }
        ],
        "runtime": "claude_code",
        "models": {
          "default": "sonnet"
        }
      }
    }
  }'

Roles:

• primary — The main application. Changes here drive the build; failures block progress.
• dependency — Libraries or services modified to support the primary repo. Failures are captured but don't block.

Use cases:

• Primary app + shared SDK or utilities library
• Monorepo sub-projects that live in separate repos
• Feature spanning multiple microservices (e.g., API + worker queue)

Autonomous Build Spotlight

Rust-based Python compiler benchmark (built autonomously):

Metric	CPython (subprocess)	RustPython (SWE-AF)	Improvement
Steady-state execution	Baseline (~19ms)	Optimized in-process runtime	88.3x-602.3x faster
Geometric mean	1.0x baseline	253.8x	253.8x
Peak throughput	~52 ops/s	31,807 ops/s	~612x

Throughput comparison measures different execution models: CPython subprocess spawn (~19ms per call → ~52 ops/s) vs RustPython pre-warmed interpreter pool (in-process). This is the real-world tradeoff the system was built to optimize — replacing repeated subprocess invocations with a persistent pool for short-snippet execution.

Artifact trail includes 175 tracked autonomous agents across planning, coding, review, merge, and verification.

Details: examples/llm-rust-python-compiler-sonnet/README.md

Why SWE-AF

Most agent frameworks wrap a single coder loop. SWE-AF is a coordinated engineering factory — planning, execution, and governance agents run as a control stack that adapts in real time.

• Hardness-aware execution — easy issues pass through quickly, while hard issues trigger deeper adaptation and DAG-level replanning instead of blind retries.
• Factory architecture — not a single-agent wrapper. Planning, execution, and governance agents run as a coordinated control stack — the architecture encodes the engineering strategy, not the prompts (see The Atomic Unit of Intelligence).
• Multi-model, multi-provider — assign different models per role (coder: opus, qa: haiku). Works with Claude, OpenRouter, OpenAI, and Google.
• Continual learning — with enable_learning=true, conventions and failure patterns discovered early are injected into downstream issues.
• Agent-scale parallelism — dependency-level scheduling + isolated git worktrees allow large fan-out without branch collisions.
• Fleet-scale orchestration — many SWE-AF nodes can run continuously in parallel via AgentField, driving thousands of agent invocations across concurrent builds.
• Explicit compromise tracking — when scope is relaxed, debt is typed, severity-rated, and propagated.
• Long-run reliability — checkpointed execution supports resume_build after crashes or interruptions.

In Action

PR #179: Go SDK DID/VC Registration — built entirely by SWE-AF (Claude runtime with haiku-class models). One API call, zero human code.

Metric	Value
Issues completed	10/10
Tests passing	217
Acceptance criteria	34/34
Agent invocations	79
Model	claude-haiku-4-5
Total cost	$19.23

Role	Cost	%
Coder	$5.88	30.6%
Code Reviewer	$3.48	18.1%
QA	$1.78	9.2%
GitHub PR	$1.66	8.6%
Integration Tester	$1.59	8.3%
Merger	$1.22	6.3%
Workspace Ops	$1.77	9.2%
Planning (PM + Arch + TL + Sprint)	$0.79	4.1%
Verifier + Finalize	$0.34	1.8%
Synthesizer	$0.05	0.2%

79 invocations, 2,070 conversation turns. Planning agents scope and decompose; coders work in parallel isolated worktrees; reviewers and QA validate each issue; merger integrates branches; verifier checks acceptance criteria against the PRD.

Claude, open-source, and Codex models supported: Run builds with any runtime and tune models per role in one flat config map.

• runtime: "claude_code" maps to Claude backend.
• runtime: "open_code" maps to OpenCode backend (OpenRouter/OpenAI/Google/Anthropic model IDs).
• runtime: "codex" maps to the OpenAI Codex CLI backend.

Adaptive Factory Control

SWE-AF uses three nested control loops to adapt to task difficulty in real time:

Loop	Scope	Trigger	Action
Inner loop	Single issue	QA/review fails	Coder retries with feedback
Middle loop	Single issue	Inner loop exhausted	run_issue_advisor retries with a new approach, splits work, or accepts with debt
Outer loop	Remaining DAG	Escalated failures	run_replanner restructures remaining issues and dependencies

This is the core factory-control behavior: control agents supervise worker agents and continuously reshape the plan as reality changes.

Quick Start

Install into AgentField (af install)

Already running an AgentField control plane? Install SWE-AF straight from GitHub — no clone, no local Python setup:

af install https://github.com/Agent-Field/SWE-AF
af run swe-planner

af install clones the repo, provisions an isolated Python environment, and registers the swe-planner node with your control plane. On first af run you're prompted for the one required secret — an LLM provider key (ANTHROPIC_API_KEY or OPENROUTER_API_KEY) — which is stored encrypted and reused across every node, so you enter it only once. (Add GH_TOKEN when you want builds to clone private repos and open pull requests.) Then kick off a build:

af call swe-planner.build --in '{"goal": "Add JWT auth", "repo_url": "https://github.com/user/my-repo"}'

New to AgentField? Install the control plane first with curl -fsSL https://agentfield.ai/install.sh | bash, or use the Railway / local options below.

Deploy with Railway (fastest)

One click deploys SWE-AF + AgentField control plane + PostgreSQL. Exactly one environment variable is required in Railway — an LLM provider key:

• OPENROUTER_API_KEY — recommended, simplest. One key, 200+ open and proprietary models. With only this set (no ANTHROPIC_API_KEY, no SWE_DEFAULT_RUNTIME), SWE-AF auto-selects the open_code runtime and defaults every role to openrouter/deepseek/deepseek-v4-flash-0731 — no further configuration needed.
• Alternative: ANTHROPIC_API_KEY, or CLAUDE_CODE_OAUTH_TOKEN from claude setup-token in Claude Code CLI (uses Pro/Max subscription credits), to run the claude_code runtime instead.

Optional:

• GH_TOKEN — GitHub personal access token with repo scope. Needed only to clone private repos, push branches, and open pull requests; builds against public repos work without it.

Once deployed, trigger a build:

curl -X POST https://<control-plane>.up.railway.app/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -H "X-API-Key: this-is-a-secret" \
  -d '{"input": {"goal": "Add JWT auth", "repo_url": "https://github.com/user/my-repo"}}'

1. Requirements (local)

• Python 3.12+
• AgentField control plane (af)
• AI provider API key (Anthropic, OpenRouter, OpenAI, or Google)

2. Install

python3.12 -m venv .venv
source .venv/bin/activate
python -m pip install --upgrade pip
python -m pip install -e ".[dev]"

3. Run

af                 # starts AgentField control plane on :8080
python -m swe_af   # registers node id "swe-planner"

4. Trigger a build

# Default (uses Claude)
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Add JWT auth to all API endpoints",
    "repo_url": "https://github.com/user/my-project"
  }
}
JSON

# With open-source runtime + flat role map
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Add JWT auth",
    "repo_url": "https://github.com/user/my-project",
    "config": {
      "runtime": "open_code",
      "models": {
        "default": "openrouter/minimax/minimax-m2.5"
      }
    }
  }
}
JSON

# With Codex CLI runtime
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Add JWT auth",
    "repo_url": "https://github.com/user/my-project",
    "config": {
      "runtime": "codex",
      "models": {
        "default": "gpt-5.3-codex"
      }
    }
  }
}
JSON

# Fast mode with Codex CLI runtime
curl -X POST http://localhost:8080/api/v1/execute/async/swe-fast.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Add a focused bug fix",
    "repo_url": "https://github.com/user/my-project",
    "config": {
      "runtime": "codex",
      "models": {
        "default": "gpt-5.3-codex"
      }
    }
  }
}
JSON

# Local workspace mode (repo_path) + targeted role override
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Refactor and harden auth + billing flows",
    "repo_path": "/path/to/repo",
    "config": {
      "runtime": "claude_code",
      "models": {
        "default": "sonnet",
        "coder": "opus",
        "qa": "opus"
      },
      "enable_learning": true
    }
  }
}
JSON

For OpenRouter with open_code, use model IDs in openrouter/<provider>/<model> format (for example openrouter/minimax/minimax-m2.5).

For Codex with ChatGPT subscription auth, install the Codex CLI on the host, run codex login, leave OPENAI_API_KEY unset for this process, and set SWE_CODEX_AUTH_MODE=chatgpt or auto. For OpenAI API-platform billing, set SWE_CODEX_AUTH_MODE=api_key and OPENAI_API_KEY.

Codex deployments using the Docker image must set SWE_DEFAULT_MODEL=gpt-5.3-codex on the environment (or pass models: {"default": "gpt-5.3-codex"} in every build's config). The image bakes HARNESS_MODEL=openrouter/moonshotai/kimi-k2.6 as an OpenCode fallback, and SWE-AF's model-resolution env cascade reads HARNESS_MODEL — so without SWE_DEFAULT_MODEL set, the Codex CLI receives an OpenRouter model id it can't handle and the Product Manager reasoner fails in ~13s. Setting SWE_DEFAULT_MODEL makes the cascade pin every role to the Codex model.

Codex CLI's workspace-write sandbox uses bubblewrap (bwrap) and needs Linux user namespaces enabled on the host. Most production Linux hosts and managed container runtimes (Railway, etc.) allow this by default, but local Docker on WSL2 or hardened environments may refuse with bwrap: No permissions to create a new namespace. If the verifier reports that error, the coder ran but couldn't write files — enable user namespaces on the host before relying on the codex runtime there.

Optional: web search

Coding and review agents can look up external documentation, library APIs, error messages, and version/deprecation status during a build. This is opt-in via two env vars on the deployment:

OPENCODE_ENABLE_EXA=1
EXA_API_KEY=...

When set, opencode's built-in websearch and webfetch tools become available to every reasoner running through the open runtime — the model decides when to use them based on the task. Get a key at exa.ai.

The coder reasoner additionally gets a brief restraint guideline appended to its system prompt, so a long coding loop doesn't rabbit-hole on searches it could answer by reading the codebase. No setup required beyond the env vars; the wiring inherits parent env naturally through agentfield's CLI harness.

This works on the open runtime (opencode). The Claude runtime uses Anthropic's first-party WebSearch/WebFetch and is currently not wired here — file an issue if you want it.

What Happens In One Build

• Architecture is generated and reviewed before coding starts
• Issues are dependency-sorted and run in parallel across isolated worktrees
• Each issue gets dedicated coder, tester, and reviewer passes
• Failed issues trigger advisor-driven adaptation (split, re-scope, or escalate)
• Escalations trigger replanning of the remaining DAG
• End result is merged, integration-tested, and verified against acceptance criteria

Typical runs spin up 400-500+ agent instances across planning, execution, QA, and verification. For larger DAGs and repeated adaptation/replanning cycles, SWE-AF can scale into the high hundreds to thousands of agent invocations in a single build.

Benchmark

95/100 with haiku and MiniMax: SWE-AF scored 95/100 with both Claude haiku-class routing ($20) and MiniMax M2.5 via open runtime ($6), outperforming Claude Code sonnet (73), Codex o3 (62), and Claude Code haiku (59) on the same prompt.

Dimension	SWE-AF (haiku)	SWE-AF (MiniMax)	CC Sonnet	Codex (o3)	CC Haiku
Functional (30)	30	30	30	30	30
Structure (20)	20	20	10	10	10
Hygiene (20)	20	20	16	10	7
Git (15)	15	15	2	2	2
Quality (15)	10	10	15	10	10
Total	95	95	73	62	59
Cost	~$20	~$6	?	?	?
Time	~30-40 min	43 min	?	?	?

Same prompt tested across multiple agents. SWE-AF with Claude runtime (haiku-class model mapping) used 400+ agent instances; SWE-AF with MiniMax M2.5 via open runtime achieved identical quality at 70% cost savings.

Prompt used for all agents:

Build a Node.js CLI todo app with add, list, complete, and delete commands. Data should persist to a JSON file. Initialize git, write tests, and commit your work.

Scoring framework

Dimension	Points	What it measures
Functional	30	CLI behavior and passing tests
Structure	20	Modular source layout and test organization
Hygiene	20	.gitignore, clean status, no junk artifacts
Git	15	Commit discipline and message quality
Quality	15	Error handling, package metadata, README quality

Reproduction

# SWE-AF (Claude runtime, haiku-class mapping) - $20, 30-40 min
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Build a Node.js CLI todo app with add, list, complete, and delete commands. Data should persist to a JSON file. Initialize git, write tests, and commit your work.",
    "repo_path": "/tmp/swe-af-output",
    "config": {
      "runtime": "claude_code",
      "models": {
        "default": "haiku"
      }
    }
  }
}
JSON

# SWE-AF (MiniMax M2.5 via OpenRouter runtime) - $6, 43 min
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Build a Node.js CLI todo app with add, list, complete, and delete commands. Data should persist to a JSON file. Initialize git, write tests, and commit your work.",
    "repo_path": "/workspaces/todo-app-benchmark",
    "config": {
      "runtime": "open_code",
      "models": {
        "default": "openrouter/minimax/minimax-m2.5"
      }
    }
  }
}
JSON

# Claude Code (haiku)
claude -p "Build a Node.js CLI todo app with add, list, complete, and delete commands. Data should persist to a JSON file. Initialize git, write tests, and commit your work." --model haiku --dangerously-skip-permissions

# Claude Code (sonnet)
claude -p "Build a Node.js CLI todo app with add, list, complete, and delete commands. Data should persist to a JSON file. Initialize git, write tests, and commit your work." --model sonnet --dangerously-skip-permissions

# Codex (gpt-5.3-codex)
codex exec "Build a Node.js CLI todo app with add, list, complete, and delete commands. Data should persist to a JSON file. Initialize git, write tests, and commit your work." --full-auto

MiniMax M2.5 Measured Metrics (Feb 2026):

• 99.22% code coverage (only agent with measured coverage)
• 4 custom error types (TodoError, ValidationError, NotFoundError, StorageError)
• 999 LOC, 4 modules, 74 tests, 9 commits

Production Quality Analysis: Objective comparison of measurable metrics across all agents.

Benchmark assets, logs, evaluator, and generated projects live in examples/agent-comparison/.

Ship code, then audit it: SEC-AF runs the same multi-agent architecture against your codebase — 250 agents, 94% noise reduction, every finding proven.

Docker

cp .env.example .env
# Uncomment exactly ONE provider key: OPENROUTER_API_KEY (recommended),
# ANTHROPIC_API_KEY, CLAUDE_CODE_OAUTH_TOKEN, OPENAI_API_KEY, or GOOGLE_API_KEY
# Optionally add GH_TOKEN (private-repo clones, pushing branches, opening PRs)

docker compose up -d

.env.example ships with every provider key commented out — uncomment exactly one. In particular, don't leave a placeholder ANTHROPIC_API_KEY value in place: any non-empty value forces the claude_code runtime and breaks an OpenRouter-only setup.

Submit a build:

# Default runtime (auto-selected from whichever provider key is in .env)
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Add JWT auth",
    "repo_url": "https://github.com/user/my-repo"
  }
}
JSON

# With open-source runtime (set OPENROUTER_API_KEY in .env)
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Add JWT auth",
    "repo_url": "https://github.com/user/my-repo",
    "config": {
      "runtime": "open_code",
      "models": {
        "default": "openrouter/minimax/minimax-m2.5"
      }
    }
  }
}
JSON

# Local workspace mode (repo_path)
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "goal": "Add JWT auth",
    "repo_path": "/workspaces/my-repo"
  }
}
JSON

Scale workers:

docker compose up --scale swe-agent=3 -d

Use a host control plane instead of Docker control-plane service:

docker compose -f docker-compose.local.yml up -d

GitHub Repo Workflow (Clone -> Build -> PR)

Pass repo_url instead of repo_path to let SWE-AF clone and open a PR after execution.

curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.build \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "repo_url": "https://github.com/user/my-project",
    "goal": "Add comprehensive test coverage",
    "config": {
      "runtime": "claude_code",
      "models": {
        "default": "sonnet",
        "coder": "opus",
        "qa": "opus"
      }
    }
  }
}
JSON

Requirements:

• GH_TOKEN in .env with repo scope — required for this workflow, since it clones private repos, pushes the branch, and opens the PR. Builds that stay local (repo_path) or target a public repo don't need it.
• Repo access for that token

Post-PR CI gate

After SWE-AF pushes the integration branch and opens a PR (ready for review, not draft), it watches GitHub Actions on that PR until checks are conclusive. If they fail, a bounded fix-and-repush loop runs an agent that is explicitly forbidden from silencing tests (no pytest.skip, no xfail, no commenting tests out, no loosening assertions) — it must produce a legitimate fix in the production code and push a new commit. When CI is green, the gate returns success; when CI fails after fix attempts, the PR stays open with visible failing checks so a human reviewer can step in.

Configuration on BuildConfig:

Field	Default	Purpose
check_ci	true	Run the post-PR CI gate. Set false to return immediately after the PR is created.
max_ci_fix_cycles	2	Cap on watch → fix → repush iterations after the initial push.
ci_wait_seconds	1500	Wall-clock cap per gh pr checks watch (25 min).
ci_poll_seconds	30	Poll interval for gh pr checks.

Use SWE-AF as a Sub-Harness (Issue-Level Builds)

The full build pipeline is feature-level: it plans, decomposes, and verifies a whole feature, which takes hours. When the caller is itself a coding harness — Claude Code, Codex, OpenCode — it has already done the planning. For that case SWE-AF exposes an issue-level entry point, implement_issue, that skips every planning agent and runs just the coding loop on an isolated branch. Delegating well-scoped issues to SWE-AF on cheap or open-weight models keeps the main harness's token budget for the work that needs it.

Rule of thumb for the two prompt shapes:

Prompt shape	Entry point
"Implement X feature" (needs decomposition)	swe-planner.build / swe-fast.build
"Change this code in this file, like this" (fully scoped, context supplied)	swe-planner.implement_issue / swe-fast.implement_issue

A harness does not need this table hardcoded: both entry points register with the control plane carrying an entrypoint tag and a routing description, so af ls --entrypoints (or GET /api/v1/discovery/capabilities) lists them — with when-to-use guidance — on any AgentField control plane the node joins (agentfield ≥ 0.1.113).

Each call creates its own git worktree and an issue/<build_id>-<slug> branch off base_branch (default: the current branch), implements the issue with the coder → reviewer loop (a QA + synthesizer path when needs_deeper_qa is set), optionally runs one verifier pass against the acceptance criteria, removes the worktree, and returns the branch. The caller's checkout, current branch, and git status are untouched — so a main harness can fan out several issues against the same repo_path concurrently and merge the returned branches itself. Nothing is pushed and no PR is opened unless enable_github_pr is set: the caller owns merge and CI. Typical cost is 4–8 LLM calls (vs hundreds for a feature-level build).

# Delegate one scoped issue (async; returns an execution_id immediately)
curl -X POST http://localhost:8080/api/v1/execute/async/swe-planner.implement_issue \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "input": {
    "issue": {
      "title": "Add retry with exponential backoff to fetch_user",
      "description": "In src/api/client.py, wrap fetch_user's HTTP call in a retry helper: 3 attempts, 0.5s base delay, doubling. Reuse the existing logger for retry warnings.",
      "acceptance_criteria": [
        "fetch_user retries up to 3 times on ConnectionError",
        "tests cover the retry-then-succeed path"
      ],
      "files_to_modify": ["src/api/client.py"],
      "testing_strategy": "pytest tests/api/test_client.py"
    },
    "repo_path": "/workspaces/my-project",
    "base_branch": "main",
    "config": { "models": { "default": "haiku" } }
  },
  "webhook": { "url": "https://my-harness.example/hooks/swe-af" }
}
JSON

# Poll instead of (or in addition to) the webhook
curl http://localhost:8080/api/v1/executions/<execution_id>
# Progress notes while it runs
curl http://localhost:8080/api/v1/executions/<execution_id>/notes

The result's branch field is the deliverable:

{
  "success": true,
  "outcome": "completed",
  "branch": "issue/a1b2c3d4-add-retry-with-exponential-backoff",
  "base_branch": "main",
  "commits": ["<sha>"],
  "files_changed": ["src/api/client.py", "tests/api/test_client.py"],
  "iterations": 1,
  "verification": { "passed": true, "criteria_results": ["..."] },
  "debt_items": [],
  "pr_url": ""
}

issue fields: title + description (required), acceptance_criteria, files_to_create / files_to_modify, testing_strategy, needs_deeper_qa (routes through QA + reviewer + synthesizer), estimated_complexity, name. additional_context (top-level) is appended to the description.

config keys (full schema: swe_af/issue/schemas.py):

Key	Default	Description
runtime / models	as in build	Same runtime + flat role map; valid role keys: default, coder, code_reviewer, qa, qa_synthesizer, verifier, git
max_coding_iterations	3	Inner-loop budget (the feature-level default is 5)
verify	true	One verifier pass against the acceptance criteria
enable_github_pr	false	Push the branch and open a PR (needs an origin remote)
agent_timeout_seconds	1800	Per-agent timeout
agent_max_turns	50	Tool-use turn budget per agent
keep_worktree	false	Leave the worktree in place for debugging

Notes for main-harness authors:

• repo_path must be a checkout the SWE-AF node can reach (same machine, or the shared workspaces volume in the Docker setup) with at least one commit.
• Uncommitted changes in the caller's tree are not visible to the issue branch — it is created from the committed base state.
• A failed build with commits still returns the branch (success: false) so the caller can triage; a build that produced no commits deletes its branch and returns branch: "".
• Cap your fan-out: each delegation is a paid multi-agent run. A handful of concurrent issues per repo is the sweet spot — the node also bounds its own concurrency.
• Available identically on swe-fast.implement_issue, and on the Go implementation under those same node ids.

A ready-made Claude Code skill for this flow ships in .claude/skills/delegate-issue/.

API Reference

Core async endpoints (returns an execution_id immediately):

# Full build: plan -> execute -> verify
POST /api/v1/execute/async/swe-planner.build

# Issue-level build (sub-harness entry): coding loop only, no planning
POST /api/v1/execute/async/swe-planner.implement_issue

# Plan only
POST /api/v1/execute/async/swe-planner.plan

# Execute a prebuilt plan
POST /api/v1/execute/async/swe-planner.execute

# Resume after interruption
POST /api/v1/execute/async/swe-planner.resume_build

Monitoring:

curl http://localhost:8080/api/v1/executions/<execution_id>

Every specialist is also callable directly:

POST /api/v1/execute/async/swe-planner.<agent>

Agent	In -> Out
run_product_manager	goal -> PRD
run_architect	PRD -> architecture
run_tech_lead	architecture -> review
run_sprint_planner	architecture -> issue DAG
run_issue_writer	issue spec -> detailed issue
run_coder	issue + worktree -> code + tests + commit
run_qa	worktree -> test results
run_code_reviewer	worktree -> quality/security review
run_qa_synthesizer	QA + review -> FIX / APPROVE / BLOCK
run_issue_advisor	failure context -> adapt / split / accept / escalate
run_replanner	build state + failures -> restructured plan
run_merger	branches -> merged output
run_integration_tester	merged repo -> integration results
run_verifier	repo + PRD -> acceptance pass/fail
generate_fix_issues	failed criteria -> targeted fix issues
run_github_pr	branch -> push + PR

Pass config to build or execute. Full schema: swe_af/execution/schemas.py

Key	Default	Description
runtime	"claude_code"	Model runtime: "claude_code", "open_code", or "codex". The default also honors the SWE_DEFAULT_RUNTIME env var when no runtime is passed in config — set it on the deployment so callers don't need to plumb a config through.
models	null	Flat role-model map (default + role keys below). Without a caller-supplied value, the SWE_DEFAULT_MODEL env var is used as the default for all roles — set it on the deployment to pin a model without code changes. Caller models.default or per-role keys still win.
max_coding_iterations	5	Inner-loop retry budget
max_advisor_invocations	2	Middle-loop advisor budget
max_replans	2	Build-level replanning budget
enable_issue_advisor	true	Enable issue adaptation
enable_replanning	true	Enable global replanning
enable_learning	false	Enable cross-issue shared memory (continual learning)
agent_timeout_seconds	2700	Per-agent timeout
agent_max_turns	150	Tool-use turn budget

models supports:

• default
• pm, architect, tech_lead, sprint_planner
• coder, qa, code_reviewer, qa_synthesizer
• replan, retry_advisor, issue_writer, issue_advisor
• verifier, git, merger, integration_tester

runtime defaults < models.default < models.<role>

Minimal:

{
  "runtime": "claude_code"
}

Codex:

{
  "runtime": "codex",
  "models": {
    "default": "gpt-5.3-codex"
  }
}

Fully customized:

{
  "runtime": "open_code",
  "models": {
    "default": "openrouter/minimax/minimax-m2.5",
    "pm": "openrouter/qwen/qwen-2.5-72b-instruct",
    "architect": "openrouter/qwen/qwen-2.5-72b-instruct",
    "coder": "openrouter/deepseek/deepseek-chat",
    "qa": "openrouter/deepseek/deepseek-chat",
    "verifier": "openrouter/qwen/qwen-2.5-72b-instruct"
  },
  "max_coding_iterations": 6,
  "enable_learning": true
}

.artifacts/
├── plan/           # PRD, architecture, issue specs
├── execution/      # checkpoints, per-issue logs, agent outputs
└── verification/   # acceptance criteria results

make test
make check
make clean
make clean-examples

• Contribution guide: docs/CONTRIBUTING.md
• Code of conduct: CODE_OF_CONDUCT.md
• Security policy: SECURITY.md
• Changelog: CHANGELOG.md
• License: Apache-2.0

---

Go implementation

The node under go/ is what af install gives you, and it registers under the same ids as everything above — swe-planner and swe-fast — so no trigger, reasoner name, or API shape changes with it. The repo-root manifest declares itself superseded_by //go, so af install https://github.com/Agent-Field/SWE-AF lands there and replaces an existing Python install in place, keeping its node-scoped secrets.

The Python implementation is unchanged and still what python -m swe_af and the compose stack in docker-compose.yml run. Because the two now answer to the same node ids, running both against one control plane needs an explicit NODE_ID on one of them — docker-compose.go.yml does that. See go/README.md for build, run, and Docker instructions.

Coding engine (beta)

The Go node ships a prebuilt high-performance coding engine next to the classic coding loop. Whether it runs depends on how you got the node:

How you run SWE-AF	Engine	To change it
af install / AgentField Desktop	On by default — go/agentfield-package.yaml declares SWE_PRO_ENGINE with default: "1", and the installer injects it	SWE_PRO_ENGINE=0 for the classic loop
Clone, fork, docker-compose.go.yml, or a bare binary	Off — nothing changes unless you ask for it	SWE_PRO_ENGINE=1 to opt in

The gate is purely the environment variable; the manifest is simply what sets it for you on an af install. With the engine on, builds route per-issue coding through it — everything else, including branch/push/PR, stays with the standard pipeline. Turn it off and the node returns to the classic coder → reviewer/QA loop. Reasoner names and input/output shapes are identical either way, so switching costs nothing but a restart.

If the binary isn't present or isn't runnable, the node logs a warning and keeps using the classic loop, so the flag is safe to leave on.

Tuning knobs (SWE_PRO_VARIANT, SWE_PRO_MAX_COST, SWE_PRO_PUBLIC_URL) and the full env surface are documented in go/docs/pro-engine.md.

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