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ProbeLabs36 findings · 123 requirements
SYS-REQ-027SystemApproved

When the addressed token cannot be classified as string, object, array, number, boolean, or null, Get shall return a value-type error instead of a successful classification.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceBFindingsnone open

Specification

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

Description

When the addressed token cannot be classified as string, object, array, number, boolean, or null, Get shall return a value-type error instead of a successful classification.

FRETish formula
the parser shall always satisfy !addressed_token_shape_is_invalid | returns_value_type_error

Rationale & tags

Why this requirement exists, and how it is categorised.

Unknown token classification is an externally visible error path in Get and should not be hidden inside a generic parse-failure bucket.

decompositiongettype

Verification & provenance

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

Assurance levelB
Formalizationvalid
Realizabilityrealizable
Vacuitychecked_ok
Strategyfretish

Review

Status
approved
Reviewer
human:buger · lead_engineer
Reviewed
Jul 26, 2026, 15:21 UTC
Final re-approval after L3 strict posture sweep (hazard+obligation+coverage work)

History

Created
Apr 14, 2026, 00:00 UTC · human:cli
Modified
Jul 26, 2026, 15:21 UTC · human:buger

Obligations

What this requirement must witness to be considered satisfied — the required evidence, and the tests that discharge each one.

1 obligation · 1 discharged

Browse the catalogue
Discharged
Worst case if violatedMedium

Get on a leading-byte token that matches no classifier (e.g. ; at value position) returns a Number or String classification anyway, mis-routing the caller into the wrong typed accessor and producing wrong downstream values.

Discharging evidence1/1 required witnessed
  • nominalrequiredpresent
    Covered by 1 test

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 !addressed_token_shape_is_invalid | returns_value_type_error

Variables

NameTypeDirectionDescription
addressed_token_shape_is_invalidTrue when the addressed token cannot be classified as string, object, array, number, boolean, or null.
returns_value_type_errorTrue when Get returns a value-type classification error for an invalid addressed token shape.

Witnesses· 3 scenarios total

  • TestGetUnknownValueType
    deep_spec_test.go:1110
  • TestMCDC_SYS_REQ_027_Row1_TriggerFalse
    mcdc_spec_witnesses_test.go:922exercises 1 condition scenario
  • TestMCDC_SYS_REQ_027_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:934exercises 1 condition scenario
  • TestMCDC_SYS_REQ_027_Row3_ValueTypeError
    mcdc_spec_witnesses_test.go:943exercises 1 condition scenario
  • TestObligation_SYS_REQ_027
    obligation_evidence_test.go:278
  • TestGetRequirementSlices
    parser_test.go:1390

Its place

This requirement shown inside its trace neighbourhood — the parents it satisfies, the code and tests attached to it, and its findings.

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Trace evidence

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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
1
Tests
4
At-risk contracts
0

Files to re-check (1)

  • parser.goparser.go

Tests to re-run (4)

  • deep_spec_test.godeep_spec_test.go
  • mcdc_spec_witnesses_test.gomcdc_spec_witnesses_test.go
  • obligation_evidence_test.goobligation_evidence_test.go
  • parser_test.goparser_test.go

What this rests on

Discussions

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