Inspectable delivery / synthetic data only

Run the proof.
Read the limits.

No client, customer acceptance or revenue is represented. The bundled source reuses both existing conversion CLIs and adds a destination-preserving wrapper.

SHA-256 checksum: ee9a92da6db5ede5324758dec2af573f555f24ca2f20ee059e97e6201682ae36

Exact acceptance command

python3 -B -m unittest -v test_csv test_json_to_csv test_delivery

Run from the extracted directory. The existing CSV suite requires /usr/bin/python3. Ran 22 tests completed with OK (exit 0) on Linux/Python 3.14.9. Python 3.10 was not runtime-tested. No runtime packages needed. Existing JSON→CSV pytest tests also ran successfully in an isolated local venv; see actual command output.

Evidence and limits

• Existing CSV→JSON synthetic proof (preserved).
• JSON→CSV proof and verified sample.
• Malformed/nested input, output preservation and formula-prefix preservation exercised in extracted contents, not just a build folder.
• In-memory flat data only. CSV cells stay strings. JSON missing/null cells become empty; first-seen headers, scalar Python formatting, duplicate JSON keys last-wins.
• The wrapper atomically replaces only on success; raw CLI shell redirection/output I/O has different limits. Back up outputs.
• No spreadsheet-formula sanitization: = + - @ prefixes remain. Text-view untrusted output. No spreadsheet app execution or safety guarantee.

Indicative base 35 USDC, one conversion direction with agreed existing headers. Exact seller/tax/price/scope/slot and acceptance by written quote; payment only after written deliverable acceptance. One documented mismatch correction reported within 7 calendar days of delivery, not unlimited support. Existing Base-USDC only by mutual agreement.

Minimal intake · Terms · Privacy. No private dataset or funds needed to enquire.