⚠️ Draft — Non-authoritative content (noindex)
INFORMATIVEDRAFT
Truth Source: Repository schemas and tests are authoritative.
Substrates Reference
[!IMPORTANT] Non-Normative Document
This document is informative only.
SSOT:
Validation_Lab/data/curated-runs/substrate-index.yaml
This page is a Reference projection. Authority resides in the Validation Lab repository.
What is a Substrate?
A Substrate is an execution context or runtime environment against which the Lab has curated evidence. Substrates are categorized by evaluation tier:
| Tier | Meaning | Example |
|---|---|---|
| Tier-0 | Built-in / synthetic substrates | Lab-generated reference evidence |
| Tier-1 | Curated with full LG coverage | Well-documented real-world implementations |
| Tier-2 | Partial coverage / in-progress | Emerging substrates under evaluation |
Not a Ranking
Substrate tiers represent evaluation coverage maturity, not quality or endorsement. A Tier-0 substrate is not "better" than Tier-2; it simply has more complete evidence coverage.
Substrate Scope
The Lab's substrate index defines:
- Substrate ID — Unique identifier
- Status — Active, deprecated, or in-progress
- LG Coverage — Which Lifecycle Guarantees have been evaluated
- Evidence Pack References — Links to curated runs
Non-Normative Note
The substrate list evolves as new evidence is curated. See the SSOT index for the authoritative, up-to-date list.
How Substrates Are Used
- Evidence Pack Generation — You run your implementation on a substrate to generate evidence
- Lab Adjudication — The Lab evaluates your evidence pack against the substrate's expected behavior
- Coverage Reporting — Results are aggregated by substrate in the Lab's coverage reports
Related Resources
- Validation Lab Overview — Four Boundaries & terminology
- Lifecycle Guarantees — LG-01~05 definitions
- Evidence Pack Contract — Pack structure
- Lab Site: Runs — Curated runs by substrate