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source-extraction-coverage

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Actualizado8 de junio de 2026 a las 09:01

Runs doc-type-aware deterministic extraction on a source and makes shallow extraction visible by recording an extraction_estimate before and an extraction_yield after, flagging any source whose yield falls short. Use when ingesting a new source file (PDF/DOCX/XLSX/HTML/scanned) into the provisional store.

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vamseeachanta

vamseeachanta/raw-to-knowledge-playbook

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name	source-extraction-coverage
description	Runs doc-type-aware deterministic extraction on a source and makes shallow extraction visible by recording an extraction_estimate before and an extraction_yield after, flagging any source whose yield falls short. Use when ingesting a new source file (PDF/DOCX/XLSX/HTML/scanned) into the provisional store.
license	CC-BY-4.0
compatibility	Requires a deterministic extractor per doc type (pdfplumber/Docling, python-docx, openpyxl, OCR) and a landing-page frontmatter store
metadata	{"version":"1.0","enforcement_level":"L2","status":"template","incident_refs":"coverage-2pct,A-defects,D4","params":"path:str \| type:enum(auto,pdf,docx,xlsx,html,scanned)=auto"}

source-extraction-coverage

Template skill (doc 08, doc 01). The estimate/yield pair is the whole point: it is how the 2%-coverage failure (LLM-extracted a doc and silently produced ~2% of its text) becomes a loud, machine-checkable signal instead of a silent loss.

Trigger

Preconditions

Source lives in the off-repo read-only archive; record its sha256.
Type is detected by content/structure, not filename (incident D4: names lie about content).

Steps

Estimate first. Before extracting, declare extraction_estimate in the landing-page frontmatter: roughly how much extractable content this source holds (page count, table count, "text-heavy" vs "image-only"). This is a commitment made before you see the result, so a shortfall is undeniable.
Pick the recipe by type (use ADOPT-tier permissive tools from doc 12):
- pdf (born-digital): deterministic text+geometry (pdfplumber/Docling); pdf (scanned/image-only) → route to the scanned recipe (OCR as labeled interpretation, doc 11).
- docx: structured access (python-docx) + semantic Markdown (mammoth).
- xlsx: formula-graph read (openpyxl) / fast data read (calamine) — classify by scanned structure, not sheet names (D4).
- html: typed-element extraction; strip nav/boilerplate.
- scanned: OCR with a blur gate (OpenCV Laplacian-variance → too blurry stays provisional); OCR output is a claim, not source text.
Extract deterministically. Tools, not an LLM, do the bulk copy. (LLM bulk extraction yielded ~2% coverage — never the bulk path.)
Record yield. Write extraction_yield after extraction (pages/tables actually produced, % of estimate).
Flag shortfall. If yield << estimate, mark the source extraction: shallow and queue it for a different recipe. Do not let it pass as "done."

Verification

Frontmatter has BOTH extraction_estimate (pre) and extraction_yield (post); a validator script rejects a page missing either.
Sources flagged shallow appear in the re-extraction backlog, not the trusted set.

Cleanup

Raw source never copied into any repo; only derived parts + a sources: sha256 pointer.

Incident appendix

Rule	Why
Estimate before, yield after	The 2%-coverage loss was invisible until the pair made it loud
Classify on structure not name	D4: sheet/file names misclassify content
OCR output is a claim	doc 11: scanned text is interpretation, enters the provisional gate

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Classifies XLS/XLSX workbooks before extraction and requires a traceable input data or logic contract, code artifact, and verified output artifact for a ten-file canary. Use when spreadsheet files may contain formulas, named ranges, charts, cached values, protection, or mixed data and calculation logic.

2026-06-091

name	source-extraction-coverage
description	Runs doc-type-aware deterministic extraction on a source and makes shallow extraction visible by recording an extraction_estimate before and an extraction_yield after, flagging any source whose yield falls short. Use when ingesting a new source file (PDF/DOCX/XLSX/HTML/scanned) into the provisional store.
license	CC-BY-4.0
compatibility	Requires a deterministic extractor per doc type (pdfplumber/Docling, python-docx, openpyxl, OCR) and a landing-page frontmatter store
metadata	{"version":"1.0","enforcement_level":"L2","status":"template","incident_refs":"coverage-2pct,A-defects,D4","params":"path:str \| type:enum(auto,pdf,docx,xlsx,html,scanned)=auto"}

source-extraction-coverage

Template skill (doc 08, doc 01). The estimate/yield pair is the whole point: it is how the 2%-coverage failure (LLM-extracted a doc and silently produced ~2% of its text) becomes a loud, machine-checkable signal instead of a silent loss.

Trigger

Preconditions

Source lives in the off-repo read-only archive; record its sha256.
Type is detected by content/structure, not filename (incident D4: names lie about content).

Steps

Estimate first. Before extracting, declare extraction_estimate in the landing-page frontmatter: roughly how much extractable content this source holds (page count, table count, "text-heavy" vs "image-only"). This is a commitment made before you see the result, so a shortfall is undeniable.
Pick the recipe by type (use ADOPT-tier permissive tools from doc 12):
- pdf (born-digital): deterministic text+geometry (pdfplumber/Docling); pdf (scanned/image-only) → route to the scanned recipe (OCR as labeled interpretation, doc 11).
- docx: structured access (python-docx) + semantic Markdown (mammoth).
- xlsx: formula-graph read (openpyxl) / fast data read (calamine) — classify by scanned structure, not sheet names (D4).
- html: typed-element extraction; strip nav/boilerplate.
- scanned: OCR with a blur gate (OpenCV Laplacian-variance → too blurry stays provisional); OCR output is a claim, not source text.
Extract deterministically. Tools, not an LLM, do the bulk copy. (LLM bulk extraction yielded ~2% coverage — never the bulk path.)
Record yield. Write extraction_yield after extraction (pages/tables actually produced, % of estimate).
Flag shortfall. If yield << estimate, mark the source extraction: shallow and queue it for a different recipe. Do not let it pass as "done."

Verification

Frontmatter has BOTH extraction_estimate (pre) and extraction_yield (post); a validator script rejects a page missing either.
Sources flagged shallow appear in the re-extraction backlog, not the trusted set.

Cleanup

Raw source never copied into any repo; only derived parts + a sources: sha256 pointer.

Incident appendix

Rule	Why
Estimate before, yield after	The 2%-coverage loss was invisible until the pair made it loud
Classify on structure not name	D4: sheet/file names misclassify content
OCR output is a claim	doc 11: scanned text is interpretation, enters the provisional gate