Witnessed report

Witnessed finds the functions a change touched that nobody has ever seen running, and sends IBM Bob to write a witness for each one: a small script that calls the real function and must pass a six-rule gate.

Before Bob

2 of 6

changed functions never seen running

After Bob

0 of 6

changed functions never seen running

2 witnessed by Bob, gate accepted

The 6 functions this change touched

used in real runs 0only by tests 4never ran, now witnessed by Bob 2never seen running 0

tabulate._read_jsonl_filenever ran, now witnessed by Bob

change: added
file: sample/tabulate/tabulate/__init__.py
seen by: an IBM Bob witness that passed the gate
witness file: witnesses/tabulate._read_jsonl_file.py
gate verdict: accepted

import sys
sys.path.insert(0, "sample/tabulate")

from tabulate import _read_jsonl_file

import io
fobject = io.StringIO('{"id": 1, "name": "Alice"}\n{"id": 2, "name": "Bob"}\n')
result = _read_jsonl_file(fobject)

assert len(result) == 2
assert result[0]["name"] == "Alice"

Gate rules

exits with code 0 within 30 seconds
executes the function body4 of 4 body lines ran (lines 3054 to 3057)
does not modify any file in the package directory
contains a call to the target
does not patch the target module
asserts a comparison or isinstance/len check on the return value, and the assert runs

How Bob closed the gap

Witness mode

A custom Bob mode whose file edits are restricted to witnesses/*.py.

2 subagents in parallel

One per function nobody had seen running. Each follows the witness-hunt skill.

2 of 2 accepted by the gate

Each witness had to pass all six rules before the function was promoted.

1.601 Bobcoins for the whole hunt, 0.80 per witnessIncludes a first attempt the gate rejected (nonzero_exit) and the subagents' fixes.Bob session screenshots

What the change said

implement support of JSONL and CSV input formats in command line utility

fix #173

New CLI parameter:

--headers HEADERS
  where HEADERS can be "firstrow", "keys", "HEADER1,HEADER2,...", "KEY1:HEADER1,KEY2:HEADER2,..."

--read FILEFORMAT
  where FILEFORMAT can be "rsv" (default), "csv", "jsonl"

Show the rest of the message, 25 more lines

Deprecated CLI parameter:

--header

Usage examples:

cat ./examples/people.csv | tabulate -r csv --headers firstrow
  id  name    email              "favorite" fruit
----  ------  -----------------  ------------------
   1  Alice   alice@example.com  apple, kiwi
   2  Bob     bob@example.com    banana,
                                 orange,
                                 lychee
   3  Carol                      pear

cat ./examples/people.jsonl | tabulate -r jsonl -f grid --headers 'id:ID,name:First Name,email:Email'
+------+--------------+-------------------+
|   ID | First Name   | Email             |
+======+==============+===================+
|    1 | Alice        | alice@example.com |
+------+--------------+-------------------+
|    2 | Bob          | bob@example.com   |
+------+--------------+-------------------+

(Upstream python-tabulate c327d6c, applied unchanged to sample/tabulate.)

What actually ran

level	before Bob	after Bob
used in real runs	0	0
only by tests	4	4
never ran, now witnessed by Bob	0	2
never seen running	2	0
total changed	6	6

Across the project's history

101 commits replayed, 0 skipped

2 of 88

commits changed a function their own tests never ran

4 of 301 changed functions never ran under the suite of their own commit.

Flagged: c327d6c, b47acc1. Every other commit raised nothing. This counts alarms; the history has no ground truth for gaps nobody noticed.

Measured with Witnessed's own library by bench/history.py, written by Claude (Anthropic), not by Bob.