Doc Reader

Overview

Read and interpret a non-drawing AEC document PDF. The user drops in a spec book, a code chapter, an AIA contract, a geotech / structural / energy report, or an AHJ letter — and asks Claude to interpret it: summarize, find a specific section, extract key values, list comments, locate a clause, etc.

This skill is the non-drawing sibling of drawing-reader. It uses the same router pattern: detect document type → confirm with the user → ask intent → route to the appropriate read pattern. Output lives in docs/doc-reads/ so each read is captured for the project record.

For drawing PDFs (single sheet, set, redline, record, shop, detail), use drawing-reader instead.

Scope and limits — read first

This skill covers:

• Specifications — CSI MasterFormat 2020 organized 3-part sections (Part 1 General, Part 2 Products, Part 3 Execution).
• Codes — IBC, IRC, IECC, NFPA, ADA, ICC A117.1, ASCE 7 (chapter or full).
• AIA contracts — B101 (Owner-Architect), A201 (General Conditions), C401 (Architect-Consultant), G-series (administrative).
• Reports — geotech, structural calc, energy modeling output, daylight study, acoustic study, environmental site assessment.
• AHJ correspondence — plan-check comment letters, RFI responses, NOTC (Notice of Final Construction), permit conditions.

This skill does NOT cover:

• Drawing PDFs — single sheet, set, redline, record, shop, detail. Use drawing-reader instead.
• DWG / RVT / IFC native files — PDFs only.
• Producing new documents — reads existing documents, does not generate them.
• Compliance verification ("does this spec meet code") — that's ada-tracker / code-analysis-builder / etc.
• Quantitative validation of report calculations — read-only; user must verify calc validity.
• Strategic interpretation ("is this a good spec") — describe only.
• Foreign / non-NA standards (BS, EU, JIS, KS) — NA AEC focus only.

When to use

Trigger on:

• "Read this spec PDF: <path>."
• "What does IBC say about <topic>?"
• "Summarize this geotech report."
• "Find clause 3.10 in the contract."
• "What does the AHJ want me to fix?"
• Pasted path to a non-drawing AEC PDF.

Do NOT trigger on:

• Drawing PDFs — use drawing-reader.
• "Score this LEED scorecard" — use leed-tracker.
• "Generate the code analysis from program data" — use code-analysis-builder.
• "Translate this spec for the contractor" — use client-translator.
• "Make a checklist from this spec" — use submittal-log-builder.

Workflow

Step 1 — Bootstrap if needed

Check whether docs/doc-reads/index.md exists. If not, create:

mkdir -p docs/doc-reads/.cache

And write a minimal index header (no script ships with this skill — keep it lean):

# Doc Reads — Project Log

| Date | Source PDF | Doc Type | User Intent | Output |
|------|------------|----------|-------------|--------|

If docs/ does not exist, confirm with the user before creating.

Step 2 — Inventory the PDF

Use the Read tool to look at the first 2 pages of the document PDF. Note:

• Total page count (from PDF metadata if available, otherwise approximate).
• Page size + orientation (8.5×11 portrait is most common for non-drawings).
• Whether the first page looks like a spec section header, a code chapter, an AIA contract title page, a report cover, or a letter.

If the PDF is large (> 100 pages), tell the user up front and confirm before reading more — vision reads are token-heavy.

Step 3 — Detect document type

Use references/document-types.md to classify the PDF as one of:

• Specification (CSI section) — formatted as Part 1/2/3, MasterFormat number (e.g. 08 14 16 Wood Doors), specifier signature block.
• Code excerpt — chapter or section heading (e.g. Chapter 10 — Means of Egress, §1006.2.1), code year on cover.
• AIA contract — AIA logo, document code (e.g. AIA Document B101™ – 2017), Owner / Architect signature blocks.
• Report — cover with project name, report title (e.g. "Geotechnical Investigation Report"), preparer firm, date, table of contents.
• AHJ letter — agency letterhead (NYC DOB, CA HCAI, etc.), comment-by-comment numbered list, action-required column.

State the detected type explicitly to the user. Ask them to confirm or correct before proceeding.

Step 4 — Confirm user intent

Ask the user what they want from the document. Use references/read-patterns.md to map common intents to handling:

• "Summarize" → high-level prose summary, key findings, page count, table of contents excerpt.
• "Find section/clause X" → locate by CSI / IBC / AIA reference, render that page, quote verbatim.
• "Extract key values" → numerical / parameter extraction (geotech soil bearing, energy model EUI, structural loads, ADA dimensions).
• "List AHJ comments" → tabulate comments + action required + responsible party + due date.
• "What does <code section> require" → verbatim quote with §X.Y.Z citation.
• "What does <contract clause> say" → verbatim quote with AIA section + paragraph.

If the user's intent doesn't fit a specialized pattern, handle directly via vision read.

Step 5 — Read or delegate

If delegating: inform the user that the request is better handled by <other-skill> and stop there (or suggest installing it via npx archtmpl@latest --skill <other-skill>).

If reading directly: open the relevant pages, vision-read for the user's intent, and produce the output. For multi-section queries, batch reads (e.g. read 5 pages at a time) to keep within token budget.

Step 6 — Write the output

Write docs/doc-reads/<read-slug>.md with:

• Header: source PDF path, doc type, user intent, date.
• Body: the read result (summary, quoted clause, extracted values, comment table, etc.).
• Citations: page number AND the document's native reference (CSI section number / IBC §X.Y.Z / AIA section + paragraph / report page + section).
• Confidence flag (high for verbatim text, medium for inferred / paraphrased, low for vision approximation of dense tables).

Slug rule: YYYY-MM-DD_<short-intent-tag> (e.g. 2026-05-08_ibc-egress-1006).

Step 7 — Update the project log

Append one row to docs/doc-reads/index.md:

echo "| 2026-05-08 | <pdf-path> | <type> | <intent> | <output-md> |" >> docs/doc-reads/index.md

Step 8 — Report

Tell the user:

• Path to the read output .md.
• Confidence summary (how many claims are high vs medium vs low).
• Caveats — any sections too dense to read fully, any clauses that referred outward (e.g. "see §1006.3" not in the bundled excerpt).
• If a more specialized skill applies for follow-up, name it.

Rules

• Every quoted clause / value must cite the document's native reference (CSI section, IBC §X.Y.Z, AIA section + paragraph, report page + section). Bare-page-number-only is insufficient.
• Verbatim quotes must be reproduced exactly — no paraphrasing of code text or contract text without flagging it.
• Confidence flag (high / medium / low) is required on every extracted value or claim.
• Document type classification must come from references/document-types.md recognition signals — not invented.
• When delegating, name the specific skill and stop — do not partially do that skill's work inline.
• Output files live in docs/doc-reads/ of the user's project.

Anti-patterns

• Reading 500 pages of a spec book without confirming with the user first. Token-heavy reads must be authorized.
• Paraphrasing code text or contract clauses. Verbatim or flag.
• Treating drawings (NCS-titleblock PDFs) as documents. They are not — use drawing-reader.
• Inventing CSI / IBC / AIA section numbers when the document's own numbering is unclear. Mark as "UNKNOWN" and flag.
• Compliance judgments ("this spec meets ADA"). The skill quotes; specialized trackers verify.
• Strategic / qualitative judgments ("this is a strong spec"). Describe only.
• Doing partial work that belongs to specialized skills (leed-tracker, ada-tracker, submittal-log-builder).

Resources

• references/_provenance.md — sources for document-type recognition + AEC document conventions
• references/document-types.md — recognition signals for 5 doc types (spec / code / contract / report / AHJ letter) + typical user requests per type
• references/read-patterns.md — user-intent → handling pattern mapping (delegation rules + direct-read recipes)