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ProbeLabs36 findings · 123 requirements
SYS-REQ-090SystemReview

When GetString is called twice with identical JSON input and identical key paths, the parser shall return identical decoded string values and identical error values on both calls.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceEFindingsnone open

Specification

The requirement exactly as authored — its complete prose text and, where present, the formal FRETish sentence it compiles to.

Description

When GetString is called twice with identical JSON input and identical key paths, the parser shall return identical decoded string values and identical error values on both calls.

FRETish formula
the parser shall always satisfy !getstring_called_twice_with_same_input | getstring_returns_identical_results

Rationale & tags

Why this requirement exists, and how it is categorised.

Deterministic string decoding ensures callers can cache or compare GetString results reliably.

getstringdeterminism

Verification & provenance

How this requirement was checked: the review trail, edit history, and the machine-analysis status terms (each ⓘ explains what it means).

Assurance levelE
Formalizationvalid
Realizabilityrealizable
Vacuitychecked_ok
Strategyfretish

Review

Status
approved
Reviewer
human:leonidbugaev
Reviewed
Apr 21, 2026, 00:00 UTC

History

Created
Apr 21, 2026, 00:00 UTC · agent:claude
Modified
Jul 26, 2026, 13:17 UTC · human:cli

Obligations

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No obligations recorded for this requirement

Proof obligations are recorded once evidence is generated. None have been captured here yet — this is expected, not a gap in the requirement itself. A required class of evidence the requirement must witness — the bridge between the requirement existing and it being proven.

Formula evidence

The formal formula behind this requirement, the variables it is written over, and the tests that exercise it (each term is explained inline).

FRETish formula

the parser shall always satisfy !getstring_called_twice_with_same_input | getstring_returns_identical_results

Variables

NameTypeDirectionDescription
getstring_called_twice_with_same_inputTrue when GetString is called twice with identical JSON input and identical key paths.
getstring_returns_identical_resultsTrue when GetString returns identical decoded string values and error values on both calls.

Witnesses· 3 scenarios total

  • TestMCDC_SYS_REQ_090_Row1_TriggerFalse
    mcdc_spec_witnesses_test.go:3040exercises 1 condition scenario
  • TestMCDC_SYS_REQ_090_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:3048exercises 1 condition scenario
  • TestGetStringDeterminism
    obligation_property_test.go:56exercises 1 condition scenario

Its place

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Trace evidence

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No implementation linked

No source files are traced to this requirement yet.

Impact

Blast radius — if you change this requirement, what else may need re-checking, and what it in turn depends on.

If you change this

Requirements
0
Files
0
Tests
2
At-risk contracts
0

Tests to re-run (2)

  • mcdc_spec_witnesses_test.gomcdc_spec_witnesses_test.go
  • obligation_property_test.goobligation_property_test.go

What this rests on

Discussions

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