Decision Workspace
structured-json-agent vs agentcast vs adk-core
Side-by-side comparison of Rust crates
35
structured-json-agent
experimentalv0.1.0
A typed and extensible library for creating and running Iterative AI Agents that generate structured JSON output.
44
agentcast
experimentalv0.1.0
Structured-output enforcer for LLM responses. Repair + validate + (optional) retry-with-LLM. BYO-LLM, BYO-schema.
69
adk-core
growingv1.0.0
Core traits and types for Rust Agent Development Kit (ADK-Rust) agents, tools, sessions, and events
Core Metrics
| structured-json-agent | agentcast | adk-core | |
|---|---|---|---|
| Health Score | 35 | 44 | 69 |
| Total Downloads | 21 | 17 | 26.0K |
| 30d Downloads | 0 | 0 | 7.1K |
| Dependents | 0 | 0 | 580 |
| Releases | 1 | 1 | 27 |
| Last Updated | 172d ago | 64d ago | 36d ago |
| Age | 5m | 2m | 7m |
Health Breakdown
structured-json-agent
Maintenance
5
Quality
12
Community
6
Popularity
2
Documentation
10
agentcast
Maintenance
9
Quality
13
Community
6
Popularity
1
Documentation
15
adk-core
Maintenance
18
Quality
17
Community
14
Popularity
5
Documentation
15
Technical Details
| structured-json-agent | agentcast | adk-core | |
|---|---|---|---|
| Version | 0.1.0 | 0.1.0 | 1.0.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT | MIT | Apache-2.0 |
| Dependencies | 9 | 6 | 14 |
| Crate Size | 20KB | 15KB | 93KB |
| Features | 0 | 0 | 2 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2024 |
| MSRV | — | 1.75 | 1.94.0 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •adk-core leads with a health score of 69/100, but none of the options score above 80.
- •adk-core is depended on by 580 crates — strongest ecosystem trust.
- •structured-json-agent, agentcast are pre-1.0 — API may change.