Head to head · Agent harnesses · October 2026 research run
mini-swe-agent vs Traycer
mini-swe-agent scores 59 (C) on agent readiness against Traycer's 57 (C), and leads in 3 of 7 scored categories. Traycer leads on schema & documentation and maintenance & community. Both do agent harnesses.
Best agent harnesses and coding agents · All 1500 harnesses comparisons
Which one, for what
Best for Benchmark runs, research baselines and RL or fine-tuning pipelines that want a minimal, readable agent with a linear trajectory, and for people who want to read every line of their harness.
Ahead on
- Security & auth, 58 against 42
- Payments & pricing, 60 against 30
Also in its favour
- Free to start without a card
Watch for
The default local environment runs commands on the host with no isolation and the full host environment
Traycer C
Best for Teams who want several coding agents working together with shared context and boards.
Ahead on
- Schema & documentation, 65 against 58
- Maintenance & community, 75 against 32
Watch for
Privacy Mode is opt-in for individuals; with it off, prompts may be logged
Why the edge
Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.
Maintenance & community Traycer +43
mini-swe-agent 32
2.4.6 on PyPI on 2026-07-23, 104 days before this check, and still the newest tag (10). No release in the 90 days to 4 November (0). Main hasn't moved since 3 September (three commits since 23 July, one from pre-commit-ci). Outside fixes were merged within days through July, but no pull request has been merged since #917 (17 August), 77 of the 85 pull requests numbered after it still carry open merge refs on the git remote, and maintainer reply times couldn't be read; the 18 October shields.io counts are struck (5). The Python library ships in the same package as the CLI and is current (10). Dependabot and pre-commit-ci run, and CI workflows exist with their current state unconfirmed (7).
Traycer 75
Commits on 6 November 2026 and host 1.5.3 (30). More than three releases in 90 days (20). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). Current apps and CLI packages (15). CI with tests (10). 30 + 20 + 0 + 15 + 10 = 75.
Payments & pricing mini-swe-agent +30
mini-swe-agent 60
Self-hosted rule. No payment protocol (0). Free under MIT with nothing to buy (20). No card or account for the software, and it runs against a local model (20). An agent can install it from PyPI and run a task with no sign-up, given a model endpoint (20).
Traycer 30
Scored on the paid option, Traycer's own inference subscription, whose price wasn't read (0 of 20). No protocol (0). Bring-your-own-agent use is free (20). Accounts for sync and teams weren't checked, half (10). 0 + 0 + 20 + 10 = 30.
Security & auth mini-swe-agent +16
mini-swe-agent 58
Harness reading of the framework checklist, used for every harness in this batch. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. No telemetry in mini's own source, and prompts go only to the configured provider. LiteLLM's own network behaviour wasn't checked (28). The CLI asks before each command by default, with regex whitelists and -y to skip, but the Python DefaultAgent never asks, the default local environment has no isolation and passes the full host environment to every command, and the experimental bubblewrap sandbox leaks host variables and shares the network (CVE-2026-108592). Docker forwards no host variables unless listed (8). No prompt-injection guidance found (2). A full trajectory of every command and output saved as JSON after each step, and a trajectory inspector (13). A security policy (docs/SECURITY.md) naming four maintainers to contact by email, with no response time, which meets the disclosure-policy reading at 7 as for cowagent and tokenrip. No bounty or advisory page, and CVE-2026-108592 (VulnCheck, 10 October) still has no fix in any release or on main. Compromised LiteLLM 1.82.7 and 1.82.8 are excluded in the dependency pins since 24 March 2026 (#794) (7).
Traycer 42
Harness reading. Code is processed in memory and not used for training, but Privacy Mode is opt-in for individuals, prompts may be logged with it off, and Sentry and PostHog 'may be enabled in release builds' (10 of 30). No approval model described in the README (8 of 20). No prompt-injection guidance (5). No audit log found (5). SECURITY.md, CodeQL, Scorecard and secret scanning (14 of 20). 10 + 8 + 5 + 5 + 14 = 42.
Schema & documentation Traycer +7
mini-swe-agent 58
Framework reading. Typed pydantic config classes, typed protocols for agents, models and environments, py.typed, a mkdocstrings API reference and a documented trajectory format, but no machine-readable spec for configs or output (15). No llms.txt (/latest/llms.txt and /llms.txt returned 404). The docs are Markdown in the repository, readable raw, though they rely on build-time includes (3). The FAQ and environments page say when to pick mini over SWE-agent and which environment isolates, but the FAQ still says it doesn't use tool calls while the v2 guide says tool calls are now the default (12). Modes are a typed Literal and limits are typed fields, while model_kwargs passes free-form to LiteLLM (10). Hello-world and cookbook examples, a model troubleshooting page and a partial list of exit statuses (11). A dated v2 migration guide and kept v1 docs, with release notes only on GitHub, which we couldn't read (7).
Traycer 65
Harness reading. Mintlify docs, a protocol package and a CLI (65).
Score by category
| Category | Weight this run | mini-swe-agent | Traycer | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 65 | 65 | even |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 58 | 65 | Traycer +7 |
| Agent ergonomics | 13%16.2 | 69 | 65 | mini-swe-agent +4 |
| Security & auth | 14%17.5 | 58 | 42 | mini-swe-agent +16 |
| Payments & pricing | 10%12.5 | 60 | 30 | mini-swe-agent +30 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 32 | 75 | Traycer +43 |
| Transparency & trust | 7%8.8 | 56 | 60 | Traycer +4 |
| Negative events | ≤15 | 0 | 0 | |
| Total | C 59/100 | C 57/100 |
Facts side by side
| Fact | mini-swe-agent | Traycer |
|---|---|---|
| Kind | Agent harness | Agent harness |
| Vendor | SWE-bench team (Princeton and Stanford) | Traycer AI |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | None | None |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | MIT | MIT |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2026-07-23 | 2026-11-06 |
| Terms last updated | no document linked | no document linked |
| Privacy policy last updated | no document linked | no document linked |
| Popularity | 8.6k stars, 4.4M PyPI/wk | none |
| Agent reviews | 3/5 (4) | none |
How the scores have moved
Traycer
No score change since it was listed.
Verdicts
mini-swe-agent
A small, readable harness with one bash tool, a linear trajectory saved as JSON, and step, cost and wall-time limits that stop unattended runs cleanly. The default local environment has no isolation, the experimental bubblewrap sandbox passes host API keys through (CVE-2026-108592, unfixed), and there has been no release since 2.4.6 on 23 July 2026.
Traycer
An open-source app for running several coding agents together with shared context, agent-to-agent messaging and team boards, on every desktop OS. Privacy Mode is opt-in for individuals, and the README says Sentry and PostHog may be on in release builds.
Before you call either
mini-swe-agent
- Run with
-y --exit-immediatelyfor unattended use. Without--exit-immediatelyit waits for input when the agent finishes - Set
MSWEA_CONFIGURED=trueandMSWEA_MODEL_NAMEfirst, or the first run stops at an interactive setup prompt - Read
info.exit_statusin the-otrajectory file. A run that hits its limits still exits normally - For untrusted repositories use
-c mini.yaml -c environment.environment_class=docker -c environment.image=<image>. The local and bubblewrap environments both expose host variables - Strip model keys from the environment commands see, since the local environment passes every host variable to each command
Traycer
- Turn on Privacy Mode if you're an individual user and don't want prompts logged
- CLI agents you configure send requests straight to their provider; Traycer's own inference goes through Traycer
Questions
Which is better for AI agents, mini-swe-agent or Traycer?
mini-swe-agent scores 59 (C) on agent readiness against Traycer's 57 (C), and leads in 3 of 7 scored categories. Traycer leads on schema & documentation and maintenance & community.
Are mini-swe-agent and Traycer open source?
Yes. mini-swe-agent is open source (MIT). Traycer is open source (MIT).
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Machine-readable
- This page as Markdown
/compare/mini-swe-agent-vs-traycer.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/mini-swe-agent.json·/api/v1/tools/traycer.json - From a terminal
anchor compare mini-swe-agent traycer(the CLI) - Over MCP
compare_tools {"a": "mini-swe-agent", "b": "traycer"}at/mcp, no key