ARCADIA-Studio/harness/experiments/analysis-context-20260911

Analysis context experiment

This standalone Rust program compares explicit baseline/override studies (B) with complete independent case bindings (D). It is an isolated experiment, not Studio syntax or a production model implementation. Its expression language is deliberately limited to integer magnitudes in milliseconds, addition/sum, comparison, missing inputs and pure reusable functions.

The source owns the fixture generator, parser, explicit context resolver, dependency-cycle check, evaluator, frozen-snapshot operation, provenance observations and line-diff counter. All comparisons use the same 20 fixed inputs, 2 varying inputs and 20 named cases. The formula/check variants are either inline or factored into reusable pure definitions.

From the repository root, using the installed local toolchain:

. .local/toolchain/env.ps1
New-Item -ItemType Directory -Force .local/analysis-context-20260911 | Out-Null
rustc --edition=2024 -D warnings -C linker=clang.exe harness/experiments/analysis-context-20260911/main.rs -o .local/analysis-context-20260911/analysis-context.exe
if ($LASTEXITCODE -ne 0) { throw 'Experiment compilation failed' }
& .local/analysis-context-20260911/analysis-context.exe harness/experiments/analysis-context-20260911/generated
if ($LASTEXITCODE -ne 0) { throw 'Experiment assertions failed' }

The program overwrites its named generated fixtures/results in the output directory. It does not invoke Cargo, modify target, or import Studio modules. EVIDENCE.json was recorded separately after the verified run and contains exact compiler, program/executable/result hashes and every generated source fixture hash. Rerunning after editing the program requires refreshing that evidence rather than trusting the old manifest.

• Results: executed counts and assertions.
• Evidence: final run identity and 29 fixture hashes.
• B with factored calculations and D equivalent.
• B case provenance.
• Frozen B case: complete independent snapshot, copied definitions and explicit captured row origins.
• Interpretation and limitations.

The small dialect has explicit study B/D revision, a shared property catalog, optional pure function declarations, an explicit named baseline for B, and named cases declaring either base engineering or independent. missing is an entire binding hole. Removing a B override resolves the baseline; removing a required D row rejects. Function parameters cannot capture project properties. No case-to-case inheritance or implicit selected/default case exists.

Generated studies do not have OA/SA subjects, UUID identity, quantity kinds, persistent source editing, JSON/REST, library import resolution or native UI integration. The experiment compares context semantics and the actual emitted text size/edit count, not human completion time or end-to-end product conformance.