aicraft 0.1.1

Run coding agents (Claude Code, Codex, Aider, OpenHands, …) against prompts in container sandboxes via Harbor

aicraft

Run coding agents (Claude Code, Codex, Aider, OpenHands, …) against prompts in container sandboxes. A thin Python library + CLI on top of the Harbor framework, focused on ad-hoc single-prompt runs rather than full benchmark evaluation.

Status: alpha. API and CLI may shift between 0.1.x releases. Pin minor versions if you depend on it.

Why this exists

Harbor itself is built around full benchmark lifecycles: scaffolding a task directory, running an agent over a dataset, scoring with a verifier, publishing trajectories. That's heavy when all you want is "run agent X on prompt Y, give me the answer."

aicraft flips the abstraction:

• Inline prompt or --prompt-file instead of a hand-built task directory
• Verifier disabled by default
• Auto-synthesizes the minimal Harbor task structure under the hood
• ATIF-aware final-text extraction (works across any agent that emits ATIF)
• Mount allowlist enforcement (refuses to mount paths outside configured roots)
• Provider presets (--provider openrouter etc.) for routing OpenAI-protocol agents through aggregator gateways

It's the opinionated, ad-hoc-friendly subset of Harbor — like gh is to a git push origin <branch> && curl github.com/... chain.

Install

pip install aicraft

aicraft requires Python 3.12+ and a working Docker daemon (or Podman with the Docker compatibility socket — set DOCKER_HOST=unix://$XDG_RUNTIME_DIR/podman/podman.sock). Harbor itself spawns each agent in a Docker container.

Usage

Library

import asyncio
from pathlib import Path
from aicraft import AgentRunner, AgentConfig, MountSpec

async def main():
    runner = AgentRunner()
    result = await runner.run(AgentConfig(
        prompt="Summarize the structure of /workspace/code in one paragraph.",
        agent="claude-code",
        mounts=[MountSpec(host=Path("/data/repo"), container=Path("/workspace/code"))],
        timeout_s=600,
    ))
    print(result.status)         # "completed" | "timeout" | "error"
    print(result.final_text)     # agent's textual reply (extracted from ATIF)
    print(result.trajectory_path)  # full trajectory on disk

asyncio.run(main())

CLI

# Inline prompt
aicraft run -a claude-code "Find dead code in this repo"

# Prompt from a file
aicraft run -a codex -M gpt-5 -f ./prompt.md

# With a mounted code directory
AICRAFT_MOUNT_ROOTS=/data/repos aicraft run -a claude-code \
  "Refactor the parser for readability" \
  --mount /data/repos/foo:/workspace/code:ro

# Specify model and a higher timeout, write structured result to file
aicraft run -a claude-code "..." \
  --model claude-sonnet-4-7 \
  --timeout 1800 \
  --output ./result.json

# Route an OpenAI-protocol agent through OpenRouter for open-weight models
OPENROUTER_API_KEY=sk-or-... aicraft run \
  -a codex -M deepseek/deepseek-chat --provider openrouter \
  "Describe the bug in /workspace/buggy.py and fix it" \
  --mount /tmp/scratch:/workspace:rw

# See installed agents
aicraft list-agents

# Locate a previously-run trajectory on disk
aicraft trajectory aicraft-3a2b1c0d9e8f

Mount syntax: host:container[:ro|rw] — default is ro. Pass :rw explicitly when the agent needs to write back.

Output

aicraft run prints a JSON document to stdout for pipeline use:

{
  "status": "completed",
  "final_text": "def reverse_string(s: str) -> str:\n    return s[::-1]",
  "trajectory_path": "/path/to/trajectories/aicraft-7dad38f46662",
  "duration_s": 65.1,
  "trial_id": "aicraft-7dad38f46662",
  "error": null
}

…and a human-readable banner to stderr so the agent's reply is easy to spot amid debug logs:

════════════════════════════════════════════════════════════════════════
 AGENT OUTPUT  [OK]  trial=aicraft-7dad38f46662  65.1s
════════════════════════════════════════════════════════════════════════
def reverse_string(s: str) -> str:
    return s[::-1]
════════════════════════════════════════════════════════════════════════

Exit codes: 0 on completed, 1 on timeout / error, 2 on a pre-flight config issue (mount not allowed, missing required model, unknown provider).

The trajectory directory contains everything Harbor captured: the ATIF trajectory.json, the agent's raw session logs, and any verifier artifacts. For an aicraft run there's no verifier output, but the ATIF trajectory has the full tool-call history.

Configuration

Variable	Purpose	Default
AICRAFT_MOUNT_ROOTS	Colon-separated absolute host paths permitted as mount sources. Empty means no mounts allowed.	empty
AICRAFT_TRAJECTORY_DIR	Where captured trajectories are stored. Override per-call with --trajectory-dir.	./trajectories/ (cwd)
OPENAI_API_KEY, OPENAI_BASE_URL, ANTHROPIC_API_KEY, ANTHROPIC_BASE_URL, GEMINI_API_KEY, GOOGLE_API_KEY, CLAUDE_CODE_OAUTH_TOKEN	Standard provider env vars consumed by Harbor agents.	—
OPENROUTER_API_KEY, FIREWORKS_API_KEY, TOGETHER_API_KEY, GROQ_API_KEY	Provider-specific keys consumed by --provider <name>.	—

Provider presets

--provider <name> rewrites OPENAI_BASE_URL and OPENAI_API_KEY from a friendly name plus a provider-specific env var, so OpenAI-protocol agents (codex, copilot-cli) can route through aggregator gateways without manual env juggling. Anthropic-protocol agents (claude-code) read ANTHROPIC_* directly and need separate setup.

Preset	Base URL	Key env var
openrouter	https://openrouter.ai/api/v1	OPENROUTER_API_KEY
fireworks	https://api.fireworks.ai/inference/v1	FIREWORKS_API_KEY
together	https://api.together.xyz/v1	TOGETHER_API_KEY
groq	https://api.groq.com/openai/v1	GROQ_API_KEY

Limitations

See GOTCHAS.md for the full list with reproduction steps and workarounds. Highlights:

• First run per agent is slow — Harbor re-installs the agent CLI in a fresh container on every trial (~45–55s for claude-code/codex). Image build is cached; container is fresh.
• Rootless Podman + claude-code — the agent runs fine, but trajectory ingestion fails reading session JSONL files (claude-code writes them at 0600, and rootless Podman's userns mapping makes them unreadable from the host). Use Docker for claude-code, or other agents (codex, aider, nop) on Podman — they're unaffected.
• final_text for non-ATIF agents — may be empty; the trajectory directory still has the full record.
• Codex requires an explicit --model — Harbor's codex agent has no default. aicraft pre-validates this in <1s.
• --provider is OpenAI-protocol only — claude-code (Anthropic protocol) needs ANTHROPIC_BASE_URL + ANTHROPIC_API_KEY set manually for gateways like OpenRouter.

Related issues filed upstream

• harbor#1514 — Defer litellm/aiohttp imports to avoid ~25s startup overhead

License

MIT — see LICENSE.