Version compatibility
For an evidence-backed inventory of alpha.1 through alpha.6 features, consult the published feature status. For specific commands, the interactive version-aware Command Finder shows shipped actions and unavailable features for each published compiler.
The language is prerelease and evolving. Use the exact executable version matching the tutorial, not a mix of snippets taken from older release notes.
| Version | Distinguishing features |
|---|---|
| v0.0.6-alpha.3 | Current published prerelease (Nov 7): deterministic Top-K scores, temperature softmax and private scalar-IR verification; no new native CLI |
| v0.0.6-alpha.2 | Previous published prerelease (Nov 6): optional bounded Rust embedding cache and dependency invalidation APIs; no new Scarp CLI commands or syntax |
| v0.0.6-alpha.1 | Earlier published prerelease (Nov 5): static symbols/references inspection, schema-v1 navigation JSON, pure rms(vector); release guide and verified project tutorial |
| v0.0.5-alpha.5 | Previous prerelease (Nov 4): explicit project module inspection and experimental Rust-only scalar C11 emitter; release guide |
| v0.0.5-alpha.4 | Published Nov 3: new create/verify DIRECTORY/launch project workflow; release guide |
| v0.0.5-alpha.3 | Historical prerelease (Nov 2): Scarp-first exec/static verify/inspect, offline diagnose, bounded text construction; four verified examples |
| v0.0.5-alpha.2 | Earlier published prerelease (Nov 2): typed declarations, integer bit operations, Unicode queries, checked conversions, integer collections, vector statistics, source-module inspection; verified release guide |
| v0.0.5-alpha.1 | Relative source modules, public functions and scalar constants; current main-reference baseline |
| v0.0.4-alpha.4 | Immutable numerical tiles and matrix operations; no source imports |
| v0.0.4-alpha.2 | Numerical vectors and related kernels |
| v0.0.4-alpha.1 | Finite binary64 floating-point values |
| v0.0.3-beta.3 | Typed funcra functions, contracts and call budgets; no floats |
| v0.0.3-beta.2 | Newer bind/var and multi-output forms, but no functions |
| v0.0.2 | Variables, scopes, booleans and decisions |
| v0.0.1 | Early interpreter and checked integer output |
Exact intermediate feature staging and archive details are recorded in the compiler's getting-started guide and releases.
Verified alpha.1 → alpha.2 migration gate
The compiler-tested upgrade readiness guide re-runs all 11 unchanged alpha.1 example programs using the exact published alpha.2 interpreter. GitHub Actions compares their stdout byte-for-byte and checks that check remains silent. This is focused evidence for the example set—not a general backward-compatibility promise, and it does not change the pinned alpha.1 main-reference baseline.
Published alpha.3 compiler and command migration
Historical published prerelease: v0.0.5-alpha.3, November 2, 2026, source commit 7715c28df09c7703b39e14fddb963275b25df476. It adds Scarp-first exec / verify / inspect / offline diagnose along with bounded Unicode text construction. Older run, check, tokens, modules still work. The alpha.1-to-alpha.2 compatibility gate does not prove automatic compatibility with alpha.3. The newer release guide includes four independent compiler-backed programs.
Historical alpha.5 compatibility boundary
The v0.0.5-alpha.5 release is source-pinned to 2eeed0aa52ccb59523307841ad8ffbd83f8911a8. Alpha.5 introduces scarp inspect modules --json DIRECTORY, unavailable in published alpha.4. It also introduces a restricted Rust embedding C11 emitter, not a scarp compile CLI. See the alpha.5 CLI reference, C11 API limits, and platform installation.
This does not prove that every old program works unchanged on the latest prerelease. Preserve tagged test fixtures and check exact versions when diagnosing a regression.
Published alpha.6 symbol/CLI compatibility boundary
The earlier alpha.6 language/CLI milestone is v0.0.6-alpha.1, built from source commit aa329a22cf2bf92d2c9814a26ff9c8b67a72e6e8. It adds scarp inspect symbols --json and scarp inspect references --json for an explicit source file or project directory, plus rms(vector). The alpha.1 symbol inventory uses snapshot-local IDs: it is not an LSP, rename feature or user-facing incremental compilation service. The subsequent alpha.2 adds separate Rust-only caching APIs. See the alpha.6 CLI, RMS guide and end-to-end project lab.
The seven-stage learning path names the exact release required for each historical runnable lesson. New published features do not imply universal binary/source compatibility across versions. There is no native .srp executable compiler CLI or general tensor runtime.
Latest alpha.2 Rust cache scope
The November 6 prerelease adds opt-in, bounded Rust-only caches for whole-graph resolution, tokens and parsed syntax, plus conservative dependency invalidation and source eviction. These APIs are not new Scarp language constructs or CLI commands. The released alpha.1 tutorials remain pinned to their original source tags. A cache hit does not override import, syntax, type or resource checks.
Source migration
Some early Scarp examples used let, let mut, and println; current v0.0.5-alpha.1 uses bind, var, and print while retaining println as an alias. Do not assume a snippet written for one prerelease runs unchanged on another. Refer to the compiler's syntax migration guide.
Avoiding documentation drift
This site documents shipped syntax for the named prerelease. A pull request, proposal, or development branch may document an interesting future capability, but it must not be promoted into the published reference until executable tests and a release verify it. Track feature status and the compiler changelog.