{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "ErrorJson",
"description": "Serializable error envelope emitted as a single NDJSON line.",
"type": "object",
"properties": {
"ok": {
"description": "Always false on error envelopes (GAP-2026-020 agent sentinel).\n\n`ok: false` together with `code` is the whole verdict: the redundant\n`error: true` duplicate left the envelope because every failure paid\nfor it and no caller branched on it alone.",
"type": "boolean"
},
"code": {
"description": "Machine-readable error code string.",
"type": "string"
},
"exit": {
"description": "Process exit status this failure maps to.",
"type": "integer",
"format": "uint8",
"minimum": 0,
"maximum": 255
},
"message": {
"description": "Human-readable error message.",
"type": "string"
},
"path": {
"description": "Filesystem path related to the error, if applicable.",
"type": [
"string",
"null"
]
},
"error_class": {
"description": "Error class: transient, conflict, `precondition_failed`, or permanent.",
"type": "string"
},
"retryable": {
"description": "Whether a retry may resolve this error.",
"type": "boolean"
},
"suggestion": {
"description": "Optional actionable suggestion for the caller.",
"type": [
"string",
"null"
]
},
"suggestion_lang": {
"description": "Language of `suggestion` when it is not English, so a consumer knows\nwhat it is reading.",
"type": [
"string",
"null"
]
},
"workspace": {
"description": "Workspace root used for jail validation, if applicable.",
"type": [
"string",
"null"
]
},
"failed_pair_index": {
"description": "1-based index of the failed `--old`/`--new` pair (multi-pair edit, G117).",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"pairs_total": {
"description": "Total number of `--old`/`--new` pairs in the invocation.\n\nEmitted by multi-pair edit (G117) and by a partial `edit-loop` run\n(v0.1.36) — one key, two producers.",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"pair_results": {
"description": "Per-pair diagnostics up to and including the failed pair (multi-pair edit, G117).\nPairs after the failure were never attempted and are absent.",
"type": [
"array",
"null"
],
"items": {
"$ref": "#/$defs/PairResult"
}
},
"best_candidate": {
"description": "Closest near-miss when a match cascade fails (v0.1.29 P0-2).",
"anyOf": [
{
"$ref": "#/$defs/BestCandidate"
},
{
"type": "null"
}
]
},
"candidates": {
"description": "Additional near-miss candidates for `did_you_mean` (v0.1.30).",
"type": [
"array",
"null"
],
"items": {
"$ref": "#/$defs/BestCandidate"
}
},
"match_count": {
"description": "Match count when ambiguity is reported (v0.1.30).",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"similar_paths": {
"description": "Similar basenames when path is missing (v0.1.30).",
"type": [
"array",
"null"
],
"items": {
"type": "string"
}
},
"conflict_count": {
"description": "Number of conflicting regions a three-way merge could not align (v0.1.36).",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"missing_flag": {
"description": "Flag literal the operation required but did not receive (v0.1.36).\n\nPresent only for [`AtomwriteError::MissingFlag`]; the duplicate `code`\non that variant is deliberate — callers branch on `missing_flag` and\nstill see the `INVALID_INPUT` family in `code`.",
"type": [
"string",
"null"
]
},
"pairs_unmatched": {
"description": "Pairs that did not match in a partial `edit-loop` run (v0.1.36).\n\n`pairs_total` already exists above for the multi-pair edit family and\nis reused by this variant instead of being duplicated.",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"pairs_applied": {
"description": "Pairs that were written to the target before the error (v0.1.37).\n\nAlways `0` for the all-or-nothing `EditPairFailed` abort (nothing is\nwritten) and `total - unmatched` for `edit-loop --partial`.",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"line": {
"description": "1-based line of the block that holds the syntax error (v0.1.38).\n\nPresent only for [`AtomwriteError::SyntaxError`]. Without it the caller\nhad to re-read the file to learn where the refusal points.",
"type": [
"integer",
"null"
],
"format": "uint",
"minimum": 0
},
"line_end": {
"description": "1-based last line of that block, when the block spans more than a line.",
"type": [
"integer",
"null"
],
"format": "uint",
"minimum": 0
},
"target_resolved": {
"description": "Absolute targets the run resolved, in invocation order, and never a joined string, so a path holding `,` stays readable; a run with one target publishes a one-item array, so the shape never depends on the count",
"type": "array",
"items": {
"type": "string"
}
},
"target_source": {
"description": "Where the target came from: named in the invocation line, inherited from the workspace slot, or the standard-input stream",
"type": "string",
"enum": [
"argv",
"workspace",
"stdin"
]
},
"workspace_source": {
"description": "Where the workspace root came from: the `--workspace` flag or the process working directory",
"type": "string",
"enum": [
"argv",
"cwd"
]
},
"records_suppressed": {
"description": "Records the writer dropped before the terminal event: `--filter` rejections, `--select` projections that emptied the record, dedupe duplicates and `--limit` cuts. It counts records, never files, so it does not compare with `files_matched`: one file can contribute several records",
"type": "integer",
"minimum": 0
},
"files_budget_dropped": {
"description": "Entries the `--limit` budget dropped, in the unit the verb produces: files for walking verbs, records for streaming ones; a floor, because workers may stop before producing the rest",
"type": "integer",
"minimum": 0
},
"files_planned": {
"description": "Files the run would have modified in `--dry-run` or `--preview`; absent from a run that really wrote",
"type": "integer",
"minimum": 0
},
"truncated": {
"description": "The record itself was cut by `--truncate-content` or `--max-output-bytes`, so the fields are shorter than the source",
"type": "boolean"
},
"truncated_records": {
"description": "Records the writer cut this run, counted once per record",
"type": "integer",
"minimum": 0
}
},
"required": [
"ok",
"code",
"exit"
],
"$defs": {
"PairResult": {
"description": "Outcome of matching a single `--old`/`--new` pair in multi-pair edit mode.\n\nEmitted in `pair_results` on both success and error envelopes so agents\ncan verify each pair objectively without re-running the edit (G117).\nIn the default all-or-nothing mode, pairs after the first failure are\nnever attempted and are absent from the array.",
"type": "object",
"properties": {
"index": {
"description": "1-based position of the pair in the `--old`/`--new` invocation order.",
"type": "integer",
"format": "uint64",
"minimum": 0
},
"matched": {
"description": "Whether the pair matched and was applied to the content.",
"type": "boolean"
},
"strategy": {
"description": "Matching strategy that succeeded (e.g. `exact`, `whitespace_normalized`).",
"type": [
"string",
"null"
]
},
"similarity": {
"description": "Similarity score of the fuzzy match, 0.0-1.0 (block-anchor and context-aware only).",
"type": [
"number",
"null"
],
"format": "double"
},
"source": {
"description": "Source of the match/replacement content: `\"arg\"` or `\"file\"`.",
"type": [
"string",
"null"
]
}
},
"required": [
"index",
"matched"
]
},
"BestCandidate": {
"description": "Closest near-miss when a fuzzy/exact match fails (v0.1.29 P0-2).\n\nAgents use this to correct `old` without re-reading the full file.",
"type": "object",
"properties": {
"text": {
"description": "Snippet of the best matching region (truncated to 500 chars).",
"type": [
"string",
"null"
]
},
"line": {
"description": "1-based line of the candidate start in the file.",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"column": {
"description": "1-based column of the candidate start.",
"type": [
"integer",
"null"
],
"format": "uint64",
"minimum": 0
},
"similarity": {
"description": "Similarity score 0.0–1.0 of the best attempt.",
"type": [
"number",
"null"
],
"format": "double"
},
"strategy": {
"description": "Strategy that produced this candidate score.",
"type": [
"string",
"null"
]
},
"diff_preview": {
"description": "Optional short unified-diff style preview.",
"type": [
"string",
"null"
]
}
}
}
}
}