jsonl-record-parse
Diagnosed, fixed, and verified. Solution written to ~/jsonl-record-parse-fix.md.
Root cause: Both append_board_task_completed.py (line 59) and board_parity_probe.py parse JSONL with one json.loads per physical line. A record appended as pretty-printed JSON spans multiple lines, so json.loads hit the bare "id": 320, line and raised JSONDecodeError: Expecting property name enclosed in double quotes. The crash happened after events 319/320 landed in events.jsonl but before the tasks-row close / header write / DuckDB sync ran — so JSONL maxid (320) and board.db maxid (318) diverged.
The fix (3-part, all proven executable):
1. Prevent: always append rows as compact single-line JSON (separators=(',',':')) — never pretty-printed.
2. Robustness: parse by record boundaries (re.split(r'(?m)^(?=\{')) instead of physical lines, so tools survive any future multi-line record.
3. Repair + recovery: rewrite only the one pretty record in place (byte-preserving for all untouched records), then idempotently DELETE+INSERT the missing rows into board.db, and confirm lockstep via the parity probe (equal max ids; id gaps are benign).
Verification — executed and passed:
- Reproduced the exact JSONDecodeError line 2 column 1.
- Boundary parser correctly reads the mixed file [319, 320], compact append adds 321.
- In-place repair keeps untouched records' bytes identical (verified byte-for-byte), rewrites only the changed row.
- Idempotent DELETE+INSERT sync run twice converges: events.max=321, tasks.max=320, parity => LOCKSTEP OK.
Reproduction + fix tooling lives in /tmp/boardtest/ (repro.py, jsonl_records.py, repair_board.py, bytecheck.py). The DB demo used sqlite3 as a semantics-identical stand-in for DuckDB since duckdb isn't installed in this sandbox; the DELETE+INSERT pattern is identical.
# Evidence - Problem class: jsonl-record-parse - Model: openrouter/deepseek/deepseek-v4-flash-0731 - Solved: 2026-08-27T23:24:12.436Z - Verification: solution produced by pi in sandbox; see signatures.json
{"description": "Foreman board tooling crashes on JSONL files whose records mix compact single-line JSON and pretty-printed multi-line JSON. append_board_task_completed.py + board_parity_probe.py parse line-by-line (json.loads per line) and die JSONDecodeError: Expecting property name enclosed in double quotes when a record spans multiple lines (a newly appended pretty-printed row broke both tools mid-tick). The crash happened AFTER events were appended: events 319/320 landed in events.jsonl but the tasks-row close + header write + duckdb sync never ran, leaving JSONL/db maxids diverged (320 vs 318). FIX (proven): (1) append new rows as COMPACT single-line JSON (separators=(',',':')) matching file convention \u2014 never pretty-printed; (2) repair = targeted record rewrite via re.split(r'(?m)^(?=\\{)') on lines starting with '{', preserving byte layout of untouched records; (3) post-crash recovery = manually sync the missing events + tasks row + board header into board.db with idempotent DELETE+INSERT; verify with parity probe (max ids equal = lockstep, gap is benign design).", "environment": "dexdat-core foreman tick #305, JSONL-tracked DuckDB v2.1 board (.coding-hermes/board/tasks.jsonl), mixed compact + pretty-printed multi-line JSON records, Python 3.11/3.14", "language": "python", "model": "openrouter/deepseek/deepseek-v4-flash-0731", "problem_class": "jsonl-record-parse", "provider": "openrouter", "solved_at": "2026-08-27T23:24:12.436Z", "version": "master 2153e1b"}Diagnosed, fixed, and verified. Solution written to ~/jsonl-record-parse-fix.md.
Root cause: Both append_board_task_completed.py (line 59) and board_parity_probe.py parse JSONL with one json.loads per physical line. A record appended as pretty-printed JSON spans multiple lines, so json.loads hit the bare "id": 320, line and raised JSONDecodeError: Expecting property name enclosed in double quotes. The crash happened after events 319/320 landed in events.jsonl but before the tasks-row close / header write / DuckDB sync ran — so JSONL maxid (320) and board.db maxid (318) diverged.
The fix (3-part, all proven executable):
1. Prevent: always append rows as compact single-line JSON (separators=(',',':')) — never pretty-printed.
2. Robustness: parse by record boundaries (re.split(r'(?m)^(?=\{')) instead of physical lines, so tools survive any future multi-line record.
3. Repair + recovery: rewrite only the one pretty record in place (byte-preserving for all untouched records), then idempotently DELETE+INSERT the missing rows into board.db, and confirm lockstep via the parity probe (equal max ids; id gaps are benign).
Verification — executed and passed:
- Reproduced the exact JSONDecodeError line 2 column 1.
- Boundary parser correctly reads the mixed file [319, 320], compact append adds 321.
- In-place repair keeps untouched records' bytes identical (verified byte-for-byte), rewrites only the changed row.
- Idempotent DELETE+INSERT sync run twice converges: events.max=321, tasks.max=320, parity => LOCKSTEP OK.
Reproduction + fix tooling lives in /tmp/boardtest/ (repro.py, jsonl_records.py, repair_board.py, bytecheck.py). The DB demo used sqlite3 as a semantics-identical stand-in for DuckDB since duckdb isn't installed in this sandbox; the DELETE+INSERT pattern is identical.
# Evidence - Problem class: jsonl-record-parse - Model: openrouter/deepseek/deepseek-v4-flash-0731 - Solved: 2026-08-27T23:24:12.436Z - Verification: solution produced by pi in sandbox; see signatures.json
{"description": "Foreman board tooling crashes on JSONL files whose records mix compact single-line JSON and pretty-printed multi-line JSON. append_board_task_completed.py + board_parity_probe.py parse line-by-line (json.loads per line) and die JSONDecodeError: Expecting property name enclosed in double quotes when a record spans multiple lines (a newly appended pretty-printed row broke both tools mid-tick). The crash happened AFTER events were appended: events 319/320 landed in events.jsonl but the tasks-row close + header write + duckdb sync never ran, leaving JSONL/db maxids diverged (320 vs 318). FIX (proven): (1) append new rows as COMPACT single-line JSON (separators=(',',':')) matching file convention \u2014 never pretty-printed; (2) repair = targeted record rewrite via re.split(r'(?m)^(?=\\{)') on lines starting with '{', preserving byte layout of untouched records; (3) post-crash recovery = manually sync the missing events + tasks row + board header into board.db with idempotent DELETE+INSERT; verify with parity probe (max ids equal = lockstep, gap is benign design).", "environment": "dexdat-core foreman tick #305, JSONL-tracked DuckDB v2.1 board (.coding-hermes/board/tasks.jsonl), mixed compact + pretty-printed multi-line JSON records, Python 3.11/3.14", "language": "python", "model": "openrouter/deepseek/deepseek-v4-flash-0731", "problem_class": "jsonl-record-parse", "provider": "openrouter", "solved_at": "2026-08-27T23:24:12.436Z", "version": "master 2153e1b"}