Decision Workspace
motosan-agent-loop vs harness-core vs smooai-smooth-operator-core
Side-by-side comparison of Rust crates
59
motosan-agent-loop
experimentalv0.44.0
Standalone ReAct agent loop — LlmClient + Engine with no platform dependencies
51
harness-core
experimentalv0.1.0
Shared types and traits for @agent-sh/harness-* Rust tools: ToolError, PermissionPolicy, ReadOperations
51
smooai-smooth-operator-core
experimentalv0.16.2
Polyglot AI agent orchestration core — agents, workflows, tools, checkpointing, memory, HITL, cost.
Core Metrics
| motosan-agent-loop | harness-core | smooai-smooth-operator-core | |
|---|---|---|---|
| Health Score | 59 | 51 | 51 |
| Total Downloads | 1.8K | 3.4K | 1.8K |
| 30d Downloads | 0 | 0 | 1.4K |
| Dependents | 78 | 29 | 154 |
| Releases | 52 | 1 | 6 |
| Last Updated | 2d ago | 82d ago | 3d ago |
| Age | 3m | 2m | 1m |
Health Breakdown
motosan-agent-loop
Maintenance
19
Quality
10
Community
11
Popularity
4
Documentation
15
harness-core
Maintenance
8
Quality
14
Community
10
Popularity
4
Documentation
15
smooai-smooth-operator-core
Maintenance
14
Quality
11
Community
12
Popularity
4
Documentation
10
Technical Details
| motosan-agent-loop | harness-core | smooai-smooth-operator-core | |
|---|---|---|---|
| Version | 0.44.0 | 0.1.0 | 0.16.2 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT | MIT | MIT |
| Dependencies | 28 | 3 | 30 |
| Crate Size | 541KB | 6KB | 292KB |
| Features | 5 | 0 | 3 |
| Yanked % | 1.9% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | 1.88 | 1.75 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •motosan-agent-loop leads with a health score of 59/100, but none of the options score above 80.
- •harness-core has the most downloads (3.4K), suggesting wider adoption.
- •smooai-smooth-operator-core is depended on by 154 crates — strongest ecosystem trust.