First real F∆I capability module. Ships as alpha in the store
index — installable, but layout-naive PDF extraction. Bumps to
1.0.0 require either the planned service-mode variant
(host-services-backed pdfium/mupdf) or confirmed-good
extraction quality on a representative document set.
Capability surface:
Inputs: document : bytes (PDF or DOCX)
Outputs: extracted : json (ExtractedDocument)
Permissions: none — pure in-WASM, no filesystem, no network
Output schema:
{
"engine": "pdf-extract" | "zip+quick-xml",
"engine_version": "<version>",
"pages": [{ "number": <u32>, "text": <string>,
"confidence?": <f64>, "bbox?": {x,y,w,h} }]
}
The optional confidence and bbox fields are reserved for the
future service-mode variant. The host-services infrastructure
that backs pdfium/mupdf does not exist yet (Phase 0.5+); when
it lands, text-extract v0.2.0 will populate these fields without
an API break.
Engines:
PDF: pdf-extract 0.7 (pure Rust, MIT-licensed). Single-column
documents extract reliably. Multi-column or table-heavy
layouts may produce reordered text — documented in
README as a known limitation of the in-WASM v0.1.0 path.
DOCX: ad-hoc parser using the zip and quick-xml crates. Walks
word/document.xml, concatenates run-level text, inserts a
newline at each paragraph boundary. Tables, footnotes,
and embedded objects are not extracted in v0.1.0.
The module is the first reference user of fai-module-sdk. The
public surface is one #[fai_module] function — no wit_bindgen,
no Guest impl, no allow attributes. Testing surface is the same
function via crate-type = ["cdylib", "rlib"]; the SDK macro
gates its WASM glue on target_arch = "wasm32" so host integration
tests work out of the box.
Tests: 6 unit + 3 integration, all green. The DOCX integration
test builds a minimal valid DOCX in memory and verifies the
JSON output schema. PDF integration coverage will land in a
follow-up once a representative test fixture is bundled.
The Forgejo CI workflow clones fai/module-sdk into a sibling
location to satisfy the path-based dev dependency. The path
will switch to a versioned git tag once SDK releases stabilize.
Signed-off-by: flemming-it <sf@flemming.it>
