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SYS-REQ-102SystemReview

When Set or Delete is called with key paths containing Unicode characters, the parser shall correctly resolve the path and perform the mutation or return a well-defined error without panicking.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceEFindingsnone open

Specification

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

Description

When Set or Delete is called with key paths containing Unicode characters, the parser shall correctly resolve the path and perform the mutation or return a well-defined error without panicking.

FRETish formula
the parser shall always satisfy !mutation_input_has_unicode_keys | mutation_handles_unicode_keys_safely

Rationale & tags

Why this requirement exists, and how it is categorised.

JSON object keys can be arbitrary Unicode strings. Mutation helpers must handle non-ASCII key paths without corrupting the document.

setdeleteedge_caseunicode

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 !mutation_input_has_unicode_keys | mutation_handles_unicode_keys_safely

Variables

NameTypeDirectionDescription
mutation_input_has_unicode_keysTrue when Set or Delete is called with key paths containing Unicode characters.
mutation_handles_unicode_keys_safelyTrue when Set or Delete correctly resolves Unicode key paths or returns well-defined error.

Witnesses· 3 scenarios total

  • TestMCDC_SYS_REQ_102_Row1_TriggerFalse
    mcdc_spec_witnesses_test.go:3347exercises 1 condition scenario
  • TestMCDC_SYS_REQ_102_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:3355exercises 1 condition scenario
  • TestMutationUnicodeKeys
    obligation_property_test.go:758exercises 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

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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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