# ledger-extract.tsv

Per-extension file census derived from the wizardwork file manifest
(`wizardwork-file-manifest.tsv`: tab-separated, no header: path, size_bytes,
extension, top_dir).

## Artifact

- Table: `ledger-extract.tsv` (tab-separated, no header).
- Verifier: `check_ledger_extract.py` (re-derives the census from the manifest
  and diffs every field against the table).
- Launcher: `CHECK` (runs the verifier; exit 0 = pass, nonzero = fail).
- Generator: `generate_ledger_extract.py` (the extraction script).

## Columns

| Column | Meaning |
| --- | --- |
| extension | File extension as recorded in the manifest (leading dots kept; empty → `(no ext)`). |
| file_count | Number of files with that extension. |
| bytes_total | Sum of `size_bytes` for the extension. |
| bytes_mean | `bytes_total / file_count`, 1 decimal place. |
| bytes_median | Median of `size_bytes`, 1 decimal place. |
| bytes_min | Smallest `size_bytes`. |
| bytes_max | Largest `size_bytes`. |

Rows are sorted by `file_count` descending, then `extension` ascending.

## How to re-verify

```bash
python3 /root/troupe-standup/wizard-work/ledger/check_ledger_extract.py
# exit code 0 = artifact matches the manifest-derived census
```

or from the repo root:

```bash
bash wizard-work/ledger/CHECK
```

## Provenance

| Item | Value |
| --- | --- |
| Source manifest | `wizard-work/ledger/wizardwork-file-manifest.tsv` |
| Source row count | 3426 files |
| Distinct extensions | recomputed by the verifier at run time |
| Extraction | `generate_ledger_extract.py` (stdlib only) |