Decision Workspace
smooai-smooth-operator vs motosan-agent-loop vs harness-core
Side-by-side comparison of Rust crates
50
smooai-smooth-operator
experimentalv0.13.7
Smooth Operator — Rust-native AI agent framework with built-in checkpointing, tool system, and LLM client
53
motosan-agent-loop
experimentalv0.22.2
Standalone ReAct agent loop — LlmClient + AgentLoop with no platform dependencies
53
harness-core
experimentalv0.1.0
Shared types and traits for @agent-sh/harness-* Rust tools: ToolError, PermissionPolicy, ReadOperations
Core Metrics
| smooai-smooth-operator | motosan-agent-loop | harness-core | |
|---|---|---|---|
| Health Score | 50 | 53 | 53 |
| Total Downloads | 795 | 1.1K | 2.8K |
| 30d Downloads | 0 | 0 | 2.7K |
| Dependents | 120 | 60 | 16 |
| Releases | 25 | 38 | 1 |
| Last Updated | 11d ago | 1d ago | 33d ago |
| Age | 1m | 2m | 1m |
Health Breakdown
smooai-smooth-operator
Maintenance
13
Quality
12
Community
12
Popularity
3
Documentation
10
motosan-agent-loop
Maintenance
13
Quality
12
Community
11
Popularity
4
Documentation
13
harness-core
Maintenance
11
Quality
14
Community
9
Popularity
4
Documentation
15
Technical Details
| smooai-smooth-operator | motosan-agent-loop | harness-core | |
|---|---|---|---|
| Version | 0.13.7 | 0.22.2 | 0.1.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT | MIT | MIT |
| Dependencies | 21 | 24 | 3 |
| Crate Size | 173KB | 298KB | 6KB |
| Features | 2 | 6 | 0 |
| Yanked % | 0.0% | 2.6% | 0.0% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | — | — | 1.75 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •motosan-agent-loop leads with a health score of 53/100, but none of the options score above 80.
- •harness-core has the most downloads (2.8K), suggesting wider adoption.
- •smooai-smooth-operator is depended on by 120 crates — strongest ecosystem trust.