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jsonparser
ProbeLabs23 findings · 123 requirementsThe fastest JSON parser for Go — formally verified with ReqProof (real library, master).
When a Config with AllowSingleQuotes=true is provided, the parser shall accept single-quoted strings (delimited by ' instead of ") using the same escape rules as double-quoted strings.
Specification
The requirement exactly as authored — its complete prose text and, where present, the formal FRETish sentence it compiles to.
When a Config with AllowSingleQuotes=true is provided, the parser shall accept single-quoted strings (delimited by ' instead of ") using the same escape rules as double-quoted strings. When AllowUnknownEscapes=true, unknown escape sequences shall be passed through literally instead of returning an error. The default Config shall remain strict (RFC 8259 only).
the parser shall always satisfy config_lenient_modes_are_opt_in_and_default_remains_strict
Rationale & tags
Why this requirement exists, and how it is categorised.
Rationale & tags
Why this requirement exists, and how it is categorised.
v1.5.0 introduces explicit opt-in compatibility modes for common non-RFC JSON emitted by external systems while preserving the strict behavior and API contracts of every existing package-level function.
Verification & provenance
How this requirement was checked: the review trail, edit history, and the machine-analysis status terms (each ⓘ explains what it means).
Review
- Status
- approved
- Reviewer
- Buger · lead_engineer
- Reviewed
- Jul 28, 2026, 13:58 UTC
History
- Created
- Jul 28, 2026, 00:00 UTC · Codex · AI agent
- Modified
- Jul 28, 2026, 13:58 UTC · Buger
Change history
Every recorded revision of this requirement's source file — newest first, each with its commit message and the diff for that change.
Every recorded revision of this object's source — newest first, each with the commit message and its file-level diff.
Obligations
What this requirement must witness to be considered satisfied — the required evidence, and the tests that discharge each one.
3 obligations · 2 discharged · 1 not yet witnessed
Browse the catalogueHappy-path behavior with valid inputs.
A Config with AllowSingleQuotes enabled fails to recognize matching single-quoted keys or values, returns incorrect offsets, or lets a quote/bracket inside a single-quoted string terminate the surrounding container early.
- nominalrequiredpresentCovered by 5 tests
Behavior when inputs are syntactically or structurally invalid.
DefaultConfig or an existing package-level function silently accepts single-quoted input or unknown escapes, weakening the established strict contract for callers that rely on malformed-input rejection.
- negativerequirednot yet witnessedRequired evidence not yet witnessed — no covering test recorded.
- nominalrequiredpresentCovered by 2 tests
Behavior specified for encoding and decoding round-trips.
AllowUnknownEscapes drops or duplicates bytes, consumes a malformed Unicode escape as an unknown escape, or emits a different literal value than the escaped input represents.
- nominalrequiredpresentCovered 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).
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 config_lenient_modes_are_opt_in_and_default_remains_strict
Variables
| Name | Type | Direction | Description |
|---|---|---|---|
| config_lenient_modes_are_opt_in_and_default_remains_strict | — | True when Config accepts single-quoted strings only with AllowSingleQuotes, passes unknown escape bytes through literally only with AllowUnknownEscapes, and the zero/default Config plus package-level functions retain strict RFC 8259 behavior. |
Witnesses· 2 scenarios total
- TestMCDC_SYS_REQ_115_Row2_LenientConfigParsesSingleQuotesexercises 1 condition scenario
- TestMCDC_SYS_REQ_115_Row1_StrictConfigRejectsSingleQuotesexercises 1 condition scenario
MC/DC truth table· 2 rows
Each row assigns the formula's conditions (T/F) and shows the Result— the formula's value for that input row, not a test pass/fail. A row proves a condition when flipping only that condition flips the outcome. The test that covers each row is linked.
mcdc:ignoreNo-actionfalse-result row satisfied by designUncoveredneeds a covering test| # | config_lenient_modes_are_opt_in_and_default_remains_strict | Result | Proves | Covering test |
|---|---|---|---|---|
| 1 | F | F | config_lenient_modes_are_opt_in_and_default_remains_strict | |
| 2 | T | T | config_lenient_modes_are_opt_in_and_default_remains_strict |
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
The concrete artifacts linked to this requirement — implementing code, verifying tests, documents, and the findings raised against it.
Impact
Blast radius — if you change this requirement, what else may need re-checking, and what it in turn depends on.
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
Files to re-check (3)
- config.goconfig.go
- escape.goescape.go
- parser.goparser.go
Tests to re-run (2)
- config_test.goconfig_test.go
- v150_mcdc_witness_test.gov150_mcdc_witness_test.go
What this rests on
Parent requirements (4)
Changes
Semantic changes that move or scope this requirement — the intended work touching it. Each links to the full change.
Discussions
Discuss this with the proof team. Nothing changes in your audit automatically — you open a request and a staff member records any outcome inside the thread.