Publish audited ONET release

Exact frozen four-file payload; build, source, dictionary and independent audit evidence in the linked source repository. No data transformation during publication.

.gitattributes

@@ -58,3 +58,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 # Video files - compressed
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.webm filter=lfs diff=lfs merge=lfs -text
+onet.duckdb filter=lfs diff=lfs merge=lfs -text

DICTIONARY.md

@@ -0,0 +1,392 @@
+# O*NET 31.0 subset data dictionary
+
+Source: [O*NET 31.0 Database](https://www.onetcenter.org/database.html), USDOL/ETA, CC BY 4.0.
+See README for attribution, modifications, grain, interpretation and limitations. Original MM/YYYY update dates remain strings.
+
+## occupation_data
+
+O*NET-SOC 2019 occupation codes, titles and descriptions; one row per occupation.
+
+Source file: `db_31_0_csv/occupation_data.csv`
+Rows: 1,016
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| onet_soc_code | VARCHAR | 0.0% | 11-1011.00 | Join occupation_data on the complete 10-character O*NET-SOC code; not a unique key in other tables. |
+| title | VARCHAR | 0.0% | Accountants and Auditors |  |
+| description | VARCHAR | 0.0% | Accommodate hotel, motel, and resort patrons by registering and assigning roo... |  |
+
+## job_titles
+
+Alternate job titles and original source codes; many titles per occupation.
+
+Source file: `db_31_0_csv/job_titles.csv`
+Rows: 54,269
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| onet_soc_code | VARCHAR | 0.0% | 11-1011.00 | Join occupation_data on the complete 10-character O*NET-SOC code; not a unique key in other tables. |
+| title | VARCHAR | 0.0% | Accountants and Auditors |  |
+| job_title | VARCHAR | 0.0% | .NET Programmer |  |
+| short_title | VARCHAR | 91.8% | 3D Animator |  |
+| sources | VARCHAR | 0.0% | 01 | Original comma-separated job-title source codes, including leading zeroes. See official dictionary. |
+
+## sample_of_reported_titles
+
+Sample job titles reported by workers, with My Next Move display flag.
+
+Source file: `db_31_0_csv/sample_of_reported_titles.csv`
+Rows: 8,189
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| onet_soc_code | VARCHAR | 0.0% | 11-1011.00 | Join occupation_data on the complete 10-character O*NET-SOC code; not a unique key in other tables. |
+| title | VARCHAR | 0.0% | Accountants and Auditors |  |
+| reported_job_title | VARCHAR | 0.0% | 3D Animator (Three-Dimensional Animator) |  |
+| shown_in_my_next_move | VARCHAR | 0.0% | N |  |
+
+## essential_skills
+
+Essential-skill importance and level ratings with uncertainty, flags and update month.
+
+Source file: `db_31_0_csv/essential_skills.csv`
+Rows: 18,200
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| onet_soc_code | VARCHAR | 0.0% | 11-1011.00 | Join occupation_data on the complete 10-character O*NET-SOC code; not a unique key in other tables. |
+| title | VARCHAR | 0.0% | Accountants and Auditors |  |
+| element_id | VARCHAR | 0.0% | 2.A.1.a | Join content_model_reference; hierarchy codes remain text. |
+| element_name | VARCHAR | 0.0% | Active Learning |  |
+| scale_id | VARCHAR | 0.0% | IM | Join scales_reference; retain scale in rating keys. |
+| scale_name | VARCHAR | 0.0% | Importance |  |
+| data_value | DECIMAL(18,2) | 0.0% | 0.00 | Native scale rating or category percentage; not a worker-level observation. |
+| n | INTEGER | 0.0% | 8 |  |
+| standard_error | DECIMAL(18,4) | 0.0% | 0.0000 |  |
+| lower_ci_bound | DECIMAL(18,4) | 0.0% | 0.0000 |  |
+| upper_ci_bound | DECIMAL(18,4) | 0.0% | 0.0000 |  |
+| recommend_suppress | VARCHAR | 0.0% | N | Y = low precision; retain source value but omit from substantive examples. |
+| not_relevant | VARCHAR | 50.0% | N | Y = not relevant; NULL is not an explicit N. |
+| update_date | VARCHAR | 0.0% | 06/2010 | Original MM/YYYY update month, not survey date, annual panel year or day-precision date. |
+| domain_source | VARCHAR | 0.0% | Analyst |  |
+
+## transferable_skills
+
+Transferable-skill importance and level ratings with uncertainty, flags and update month.
+
+Source file: `db_31_0_csv/transferable_skills.csv`
+Rows: 45,500
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| onet_soc_code | VARCHAR | 0.0% | 11-1011.00 | Join occupation_data on the complete 10-character O*NET-SOC code; not a unique key in other tables. |
+| title | VARCHAR | 0.0% | Accountants and Auditors |  |
+| element_id | VARCHAR | 0.0% | 2.B.1.a | Join content_model_reference; hierarchy codes remain text. |
+| element_name | VARCHAR | 0.0% | Complex Problem Solving |  |
+| scale_id | VARCHAR | 0.0% | IM | Join scales_reference; retain scale in rating keys. |
+| scale_name | VARCHAR | 0.0% | Importance |  |
+| data_value | DECIMAL(18,2) | 0.0% | 0.00 | Native scale rating or category percentage; not a worker-level observation. |
+| n | INTEGER | 0.0% | 8 |  |
+| standard_error | DECIMAL(18,4) | 0.0% | 0.0000 |  |
+| lower_ci_bound | DECIMAL(18,4) | 0.0% | 0.0000 |  |
+| upper_ci_bound | DECIMAL(18,4) | 0.0% | 0.0000 |  |
+| recommend_suppress | VARCHAR | 0.0% | N | Y = low precision; retain source value but omit from substantive examples. |
+| not_relevant | VARCHAR | 50.0% | N | Y = not relevant; NULL is not an explicit N. |
+| update_date | VARCHAR | 0.0% | 06/2010 | Original MM/YYYY update month, not survey date, annual panel year or day-precision date. |
+| domain_source | VARCHAR | 0.0% | Analyst |  |
+
+## work_context
+
+Work-context scale means and separate response-category percentages; never pool scales/categories.
+
+Source file: `db_31_0_csv/work_context.csv`
+Rows: 305,389
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| onet_soc_code | VARCHAR | 0.0% | 11-1011.00 | Join occupation_data on the complete 10-character O*NET-SOC code; not a unique key in other tables. |
+| title | VARCHAR | 0.0% | Accountants and Auditors |  |
+| element_id | VARCHAR | 0.0% | 4.C.1.a.2.c | Join content_model_reference; hierarchy codes remain text. |
+| element_name | VARCHAR | 0.0% | Conflict Situations |  |
+| scale_id | VARCHAR | 0.0% | CT | Join scales_reference; retain scale in rating keys. |
+| scale_name | VARCHAR | 0.0% | Context |  |
+| category | INTEGER | 17.0% | 1 | Nullable: mean rows have no category; category distributions join work_context_categories on element_id, scale_id AND category. |
+| data_value | DECIMAL(18,2) | 0.0% | 0.00 | Native scale rating or category percentage; not a worker-level observation. |
+| n | INTEGER | 0.2% | 10 |  |
+| standard_error | DECIMAL(18,4) | 27.6% | 0.0000 |  |
+| lower_ci_bound | DECIMAL(18,4) | 41.7% | 0.0003 |  |
+| upper_ci_bound | DECIMAL(18,4) | 41.7% | 0.0148 |  |
+| recommend_suppress | VARCHAR | 27.5% | N | Y = low precision; retain source value but omit from substantive examples. |
+| not_relevant | VARCHAR | 100.0% |  | Y = not relevant; NULL is not an explicit N. |
+| update_date | VARCHAR | 0.0% | 06/2006 | Original MM/YYYY update month, not survey date, annual panel year or day-precision date. |
+| domain_source | VARCHAR | 0.0% | Analyst - Transition |  |
+
+## content_model_reference
+
+Definitions of content-model elements, including hierarchy nodes beyond this subset.
+
+Source file: `db_31_0_csv/content_model_reference.csv`
+Rows: 3,006
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| element_id | VARCHAR | 0.0% | 1 | Join content_model_reference; hierarchy codes remain text. |
+| element_name | VARCHAR | 0.0% | Abilities |  |
+| description | VARCHAR | 80.5% | A statement of required or important duties performed by workers in an occupa... |  |
+
+## scales_reference
+
+Scale labels and native minimum/maximum values; no cross-scale normalization.
+
+Source file: `db_31_0_csv/scales_reference.csv`
+Rows: 33
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| scale_id | VARCHAR | 0.0% | AO | Join scales_reference; retain scale in rating keys. |
+| scale_name | VARCHAR | 0.0% | % Time |  |
+| minimum | INTEGER | 0.0% | -3 |  |
+| maximum | INTEGER | 0.0% | 10 |  |
+
+## level_scale_anchors
+
+Illustrative descriptions for points on level scales; includes other O*NET domains.
+
+Source file: `db_31_0_csv/level_scale_anchors.csv`
+Rows: 483
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| element_id | VARCHAR | 0.0% | 1.A.1.a.1 | Join content_model_reference; hierarchy codes remain text. |
+| element_name | VARCHAR | 0.0% | Active Learning |  |
+| scale_id | VARCHAR | 0.0% | LV | Join scales_reference; retain scale in rating keys. |
+| scale_name | VARCHAR | 0.0% | Level |  |
+| anchor_value | INTEGER | 0.0% | 1 |  |
+| anchor_description | VARCHAR | 0.0% | Act as general contractor for building a large industrial complex |  |
+
+## work_context_categories
+
+Labels keyed by element, scale and category for work-context response distributions.
+
+Source file: `db_31_0_csv/work_context_categories.csv`
+Rows: 281
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| element_id | VARCHAR | 0.0% | 4.C.1.a.2.c | Join content_model_reference; hierarchy codes remain text. |
+| element_name | VARCHAR | 0.0% | Conflict Situations |  |
+| scale_id | VARCHAR | 0.0% | CTP | Join scales_reference; retain scale in rating keys. |
+| scale_name | VARCHAR | 0.0% | Context (Categories 1-3) |  |
+| category | INTEGER | 0.0% | 1 | Nullable: mean rows have no category; category distributions join work_context_categories on element_id, scale_id AND category. |
+| category_description | VARCHAR | 0.0% | 40 hours |  |
+
+## occupation_level_metadata
+
+Collection modes, response rates and demographics; not population microdata.
+
+Source file: `db_31_0_csv/occupation_level_metadata.csv`
+Rows: 32,280
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| onet_soc_code | VARCHAR | 0.0% | 11-1011.00 | Join occupation_data on the complete 10-character O*NET-SOC code; not a unique key in other tables. |
+| title | VARCHAR | 0.0% | Accountants and Auditors |  |
+| item | VARCHAR | 0.0% | Data Collection Mode |  |
+| response | VARCHAR | 14.5% | 1-2 Years |  |
+| n | INTEGER | 11.7% | 100 |  |
+| percent | DECIMAL(18,1) | 2.8% | 0.0 |  |
+| update_date | VARCHAR | 0.0% | 06/2006 | Original MM/YYYY update month, not survey date, annual panel year or day-precision date. |
+
+## survey_booklet_locations
+
+Survey question identifiers keyed by element and scale; includes other domains.
+
+Source file: `db_31_0_csv/survey_booklet_locations.csv`
+Rows: 211
+
+| Column | Type | Nulls | Example | Join |
+|--------|------|-------|---------|------|
+| element_id | VARCHAR | 0.0% | 2.C.1.a | Join content_model_reference; hierarchy codes remain text. |
+| element_name | VARCHAR | 0.0% | Administration and Management |  |
+| survey_item_number | VARCHAR | 0.0% | GW01 |  |
+| scale_id | VARCHAR | 0.0% | AO | Join scales_reference; retain scale in rating keys. |
+| scale_name | VARCHAR | 0.0% | % Time |  |
+
+## Field definitions and source headers
+
+### occupation_data
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/occupation_data.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| onet_soc_code | O*NET-SOC Code | O*NET-SOC Code |
+| title | Title | O*NET-SOC Title |
+| description | Description | O*NET-SOC Description |
+
+### job_titles
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/job_titles.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| onet_soc_code | O*NET-SOC Code | O*NET-SOC Code |
+| title | Title | O*NET-SOC Title |
+| job_title | Job Title | Alternate occupational title |
+| short_title | Short Title | Short version of alternate title (if applicable) |
+| sources | Source(s) | List of source codes — see below |
+
+### sample_of_reported_titles
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/sample_of_reported_titles.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| onet_soc_code | O*NET-SOC Code | O*NET-SOC Code |
+| title | Title | O*NET-SOC Title |
+| reported_job_title | Reported Job Title | Title from incumbents or occupational experts |
+| shown_in_my_next_move | Shown in My Next Move | Whether title is shown on My Next Move career page (Y=yes, N=no) |
+
+### essential_skills
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/essential_skills.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| onet_soc_code | O*NET-SOC Code | O*NET-SOC Code |
+| title | Title | O*NET-SOC Title |
+| element_id | Element ID | Content Model Outline Position |
+| element_name | Element Name | Content Model Element Name |
+| scale_id | Scale ID | Scale ID |
+| scale_name | Scale Name | Scale Name |
+| data_value | Data Value | Rating associated with the O*NET-SOC occupation |
+| n | N | Sample size |
+| standard_error | Standard Error | Standard Error |
+| lower_ci_bound | Lower CI Bound | Lower 95% confidence interval bound |
+| upper_ci_bound | Upper CI Bound | Upper 95% confidence interval bound |
+| recommend_suppress | Recommend Suppress | Low precision indicator (Y=yes, N=no) |
+| not_relevant | Not Relevant | Not relevant for the occupation (Y=yes, N=no) |
+| update_date | Date | Date when data was updated |
+| domain_source | Domain Source | Source of the data |
+
+### transferable_skills
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/transferable_skills.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| onet_soc_code | O*NET-SOC Code | O*NET-SOC Code |
+| title | Title | O*NET-SOC Title |
+| element_id | Element ID | Content Model Outline Position |
+| element_name | Element Name | Content Model Element Name |
+| scale_id | Scale ID | Scale ID |
+| scale_name | Scale Name | Scale Name |
+| data_value | Data Value | Rating associated with the O*NET-SOC occupation |
+| n | N | Sample size |
+| standard_error | Standard Error | Standard Error |
+| lower_ci_bound | Lower CI Bound | Lower 95% confidence interval bound |
+| upper_ci_bound | Upper CI Bound | Upper 95% confidence interval bound |
+| recommend_suppress | Recommend Suppress | Low precision indicator (Y=yes, N=no) |
+| not_relevant | Not Relevant | Not relevant for the occupation (Y=yes, N=no) |
+| update_date | Date | Date when data was updated |
+| domain_source | Domain Source | Source of the data |
+
+### work_context
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/work_context.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| onet_soc_code | O*NET-SOC Code | O*NET-SOC Code |
+| title | Title | O*NET-SOC Title |
+| element_id | Element ID | Content Model Outline Position |
+| element_name | Element Name | Content Model Element Name |
+| scale_id | Scale ID | Scale ID |
+| scale_name | Scale Name | Scale Name |
+| category | Category | Percent frequency category |
+| data_value | Data Value | Rating associated with the O*NET-SOC occupation |
+| n | N | Sample size |
+| standard_error | Standard Error | Standard Error |
+| lower_ci_bound | Lower CI Bound | Lower 95% confidence interval bound |
+| upper_ci_bound | Upper CI Bound | Upper 95% confidence interval bound |
+| recommend_suppress | Recommend Suppress | Low precision indicator (Y=yes, N=no) |
+| not_relevant | Not Relevant | Not relevant for the occupation (Y=yes, N=no) |
+| update_date | Date | Date when data was updated |
+| domain_source | Domain Source | Source of the data |
+
+### content_model_reference
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/content_model_reference.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| element_id | Element ID | Content Model Outline Position |
+| element_name | Element Name | Content Model Element Name |
+| description | Description | Content Model Element Description |
+
+### scales_reference
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/scales_reference.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| scale_id | Scale ID | Scale ID |
+| scale_name | Scale Name | Scale Name |
+| minimum | Minimum | Scale Minimum |
+| maximum | Maximum | Scale Maximum |
+
+### level_scale_anchors
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/level_scale_anchors.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| element_id | Element ID | Content Model Outline Position |
+| element_name | Element Name | Content Model Element Name |
+| scale_id | Scale ID | Scale ID |
+| scale_name | Scale Name | Scale Name |
+| anchor_value | Anchor Value | Anchor value associated with element |
+| anchor_description | Anchor Description | Detail description of anchor associated with element |
+
+### work_context_categories
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/work_context_categories.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| element_id | Element ID | Content Model Outline Position |
+| element_name | Element Name | Content Model Element Name |
+| scale_id | Scale ID | Scale ID |
+| scale_name | Scale Name | Scale Name |
+| category | Category | Category value associated with element |
+| category_description | Category Description | Detail description of category associated with element |
+
+### occupation_level_metadata
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/occupation_level_metadata.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| onet_soc_code | O*NET-SOC Code | O*NET-SOC Code |
+| title | Title | O*NET-SOC Title |
+| item | Item | Occupation level statistics |
+| response | Response | Type of response |
+| n | N | Sample size for occupation |
+| percent | Percent | Percentage of responses |
+| update_date | Date | Date when data was updated |
+
+### survey_booklet_locations
+
+[Official dictionary](https://www.onetcenter.org/dictionary/31.0/csv/survey_booklet_locations.html)
+
+| Column | Original header | Definition |
+|---|---|---|
+| element_id | Element ID | Content Model Outline Position |
+| element_name | Element Name | Content Model Element Name |
+| survey_item_number | Survey Item Number | Survey Booklet Location Number |
+| scale_id | Scale ID | Scale ID |
+| scale_name | Scale Name | Scale Name |
+
+### Job-title source code legend
+
+The source description “see below” refers to this legend: 01 professional associations; 02 incumbent/occupational expert; 03 occupational code assignment; 04 SOC references; 07 government agencies; 08 USDOL/ETA and O*NET Center; 09 user input/web applications; 10 employer job postings. Multiple codes remain comma-delimited strings.

README.md

@@ -0,0 +1,70 @@
+---
+license: cc-by-4.0
+pretty_name: O*NET 31.0 Occupations, Skills and Work Context
+tags: [onet, occupations, skills, labor, work-context, duckdb]
+size_categories: [100K<n<1M]
+---
+
+# O*NET® 31.0 occupations, skills and work context
+
+A version-pinned subset of the [O*NET 31.0 Database](https://www.onetcenter.org/database.html): **468,857 rows in 12 data tables**, three convenience views, and an 89-column dictionary. The DuckDB file is **11,284,480 bytes**.
+
+Use it to explore occupational skill requirements, physical demands and reported disease/infection exposure. It describes occupations, not individual health, illness incidence, wages or employment counts. It is one mixed-date release snapshot, not an annual panel or evidence of causal effects.
+
+| Table | Rows |
+|---|---:|
+| occupation_data | 1,016 |
+| job_titles | 54,269 |
+| sample_of_reported_titles | 8,189 |
+| essential_skills | 18,200 |
+| transferable_skills | 45,500 |
+| work_context | 305,389 |
+| content_model_reference | 3,006 |
+| scales_reference | 33 |
+| level_scale_anchors | 483 |
+| work_context_categories | 281 |
+| occupation_level_metadata | 32,280 |
+| survey_booklet_locations | 211 |
+
+## Query directly
+
+With DuckDB and an available httpfs extension:
+
+```sql
+LOAD httpfs;
+ATTACH 'https://huggingface.co/datasets/Nason/onet-database/resolve/main/onet.duckdb'
+  AS onet (READ_ONLY);
+SELECT onet_soc_code,title,data_value AS mean_exposure,
+       lower_ci_bound,upper_ci_bound,n,update_date,domain_source
+FROM onet.v_work_context_means
+WHERE element_id='4.C.2.c.1.b' AND scale_id='CX'
+  AND recommend_suppress='N'
+ORDER BY data_value DESC,onet_soc_code LIMIT 15;
+```
+
+Pin the Hugging Face commit in place of `main` for reproducibility. Registry inclusion is a separate PR; `datapond.connect('onet')` and R `dp_connect('onet')` require that entry or a local registry override.
+
+## Interpretation
+
+Retain full O*NET-SOC codes and every part of each table's grain. Joining titles, skills and contexts without preselection or aggregation multiplies rows. SOC crosswalks are not necessarily one-to-one; there is no supplied QCEW, ATUS or NAICS crosswalk.
+
+`IM` (1–5 importance) and `LV` (0–7 level) are different scales. Work-context `CX` and `CT` are native means; `CXP` and `CTP` are percentages of three/five response categories. Never pool them. `v_work_context_means` has 51,927 rows for 911 occupations; category distributions cover 902 occupations and have 253,462 rows in `v_work_context_percentages`. Missing distributions are not imputed. `v_skills` combines disjoint essential/transferable domains with an explicit domain label.
+
+Low-precision `recommend_suppress='Y'` and not-relevant flags remain intact, along with all ratings, sample sizes, standard errors and confidence bounds. A missing flag is not an explicit `N`. Examples rank only explicit unsuppressed ratings. Sample size is not national employment, and ratings from different source methods or update months should not be treated as independent population observations.
+
+Update dates retain original `MM/YYYY` precision. Selected rating update months run December 2005–August 2026; skill months run June 2010–August 2026. This does not imply uniform annual measurement. Scale dictionaries and category/anchor labels accompany the ratings. Other 31.0 domains are omitted.
+
+## Provenance and validation
+
+Artifact SHA-256: `b7908bb82e50d4aa0310a6400e2193e2b11946a9d663ff2c8f1171037585c11b`.
+Source ZIP SHA-256: `55033fc68b4c13ec23e7f74dc6378660f6e854e75d55d6e333ae0a761d3987cd`.
+
+[sources-31.0.json](sources-31.0.json) contains pinned source identities, build proof, runtime identity and the independent review's scope. Every typed cell was compared against Python CSV/Decimal reads of the original ZIP both before checkpoint and after read-only reopen. Counts, schemas, keys, references, scales, flags, codelists, category sums and dictionary statistics were checked; 27 regressions passed, including an injected supervisor failure and both worker-exit races. A second build reproduced typed fingerprints and dictionary bytes. Localhost HTTP checks passed in installed Python and R clients; these do not by themselves establish public-host verification.
+
+The final independent Claude review examined supplied code and test evidence, not independently rerun computations. See the [source repository](https://github.com/ian-nason/onet-database) for scripts, detailed limitations, physical-demands/skills examples and audit records; [DICTIONARY.md](DICTIONARY.md) describes every field. O*NET publishes quarterly; this derivative uses manual, version-pinned rebuilds.
+
+## Attribution and changes
+
+This product uses the **O*NET 31.0 Database**, produced by the **U.S. Department of Labor, Employment and Training Administration (USDOL/ETA)** and developed by the National Center for O*NET Development, under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). [Official database license](https://www.onetcenter.org/license_db.html). O*NET® is a trademark of USDOL/ETA.
+
+Datapond selected 12 files, renamed columns to snake_case (`Date` to `update_date`), converted numeric fields to exact SQL types and source empty fields to NULL, and added views, metadata, dictionary, validation and examples. No nonblank source text, ratings, flags or update tokens were revised, rescaled, imputed or suppressed. USDOL/ETA has not approved, endorsed or tested these modifications. Other O*NET products and career exploration tools are outside this subset and license statement. Cite release 31.0, USDOL/ETA, CC BY 4.0 and the artifact hash.

onet.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b7908bb82e50d4aa0310a6400e2193e2b11946a9d663ff2c8f1171037585c11b
+size 11284480

sources-31.0.json

@@ -0,0 +1,1380 @@
+{
+  "snapshot_kind": "Immutable local evidence recorded before publication; every status and path inside evidence_snapshot describes that historical snapshot, not the current hosting state.",
+  "snapshot_recorded_utc": "2026-10-18T13:56:01.895057+00:00",
+  "evidence_snapshot": {
+    "build": {
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