`SSG/Builder.lean`

Explanation legend Lean4 Domain Explanation Language (L4DEL)

L4DEL explanations are a separate layer. They do not change the Lean source. Intuition is explanatory prose; numbered items are a reading path; sources link the wording back to evidence.

L4DEL: Lean4 Domain Explanation Language

Annotation provenance. This overlay contains 8 curated AI-written annotations and 3305 mechanical source-derived annotations. They have not been human-reviewed as explanations; treat them as unverified and not mathematical authority. Retained generation history: The 71 original curated annotations were produced in a Claude Sonnet 5.5 session at medium effort; Claude Opus 5.5 is recorded in that session as the advisor model, not the direct author. The bulk source-derived expansion was generated mechanically from pinned source comments by tooling developed in a GPT-5.6 Sol session at ultra reasoning; GPT-5.6 Sol did not originate the quoted source prose. On 2026-10-17 the mechanically generated source-comment annotations of the Formal Conjectures, Carleson, FLT, PFR, CompFiles, Mathematics in Lean and Theorem Proving in Lean overlays were regenerated by the same generator after three corrections made in a Claude Sonnet 5.5 session: titles no longer cut a sentence inside mathematics or end on a dangling word, workflow markers are removed from the quoted prose, and declaration names follow the scanner's namespace resolution. The boilerplate step line was dropped, and comments that were only a row of dashes no longer yield annotations. No new prose was written and no human review is claimed.

Credit: The upstream authors and contributors retain credit for the project and mathematics. lean4-explainer only renders their pinned source and adds the separately disclosed explanation layer.

Project sources: Pinned compfiles documentation, Pinned compfiles corpus index

3 declarations, 0 contain sorry, 0 declared as axioms

Site building engine

Imports (1)

SSG.Core

Imported by 1 file

SSG.lean

def copyAsset Copy a single asset line 12 source

Source documentation

Copy a single asset

def copyAsset (outDir : String) : Asset → IO Unit
  | .file src dst => do
    let content ← IO.FS.readFile src
    IO.FS.writeFile (outDir ++ "/" ++ dst) content
  | .binary src dst => do
    let content ← IO.FS.readBinFile src
    IO.FS.writeBinFile (outDir ++ "/" ++ dst) content

/-- Write a single page -/

Mentions: Asset

def writePage Write a single page line 21 source
Source documentation
Write a single page
```
def writePage (outDir : String) (page : Page) : IO Unit := do
…
```
Mentions: Page

def buildSite Build the entire site line 30 source

Source documentation

Build the entire site

def buildSite {Custom : Type} [ToString Custom] (config : SiteConfig Custom)
  (assets : List Asset) (pages : List Page) : IO Unit := do
…

Mentions: SiteConfig, Asset, Page