feat(pptx): convert PowerPoint presentations slide by slide

CHANGELOG.md

@@ -24,6 +24,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
   pulldown-cmark and rendered back, so raw HTML never passes through. Front matter `title:` or the
   first `# ` heading becomes `Extraction::title`. Available in the CLI, Python, Node and WASM packages; `format` serializes as
   `"text"` and `"markdown"`.
+- PPTX support behind the new `pptx` feature (included in `all_formats`, so in the CLI and the
+  Python/Node bindings): one `## Slide N: <title>` section per slide with bullets, text boxes,
+  tables, hyperlinks and speaker notes. Hidden slides are skipped with a `hidden_slide_skipped`
+  warning unless `include_hidden_content(true)`. Legacy `.ppt` is detected as the new `Format::Ppt`
+  and rejected explicitly. `Error::PptxExtract` reports malformed presentations.
 - Nightly cargo-fuzz targets for every parser and the renderer (`crates/markkit/fuzz`, `just fuzz`,
   `.github/workflows/fuzz.yml`), each checking the output-safety oracle.
 - HTML page metadata: `extract_document` fills `Extraction::title` (Open Graph, JSON-LD or

README.md

@@ -19,6 +19,7 @@ package for browsers and edge runtimes.
 
 - **HTML** – Web pages and HTML documents; nav, header, footer, scripts, styles and forms stripped by default
 - **DOCX** – Headings, lists, tables, links, emphasis
+- **PPTX** – One section per slide: titles, bullets, tables, links, speaker notes
 - **Spreadsheets** – XLSX/XLSM, XLSB, XLS and ODS workbooks to markdown tables, one section per sheet
 - **CSV / TSV** – One markdown table; `;` and `|` delimiters detected, RFC 4180 quoting
 - **Plain text / Markdown** – Text to paragraphs; Markdown normalized through the same IR (raw HTML never passed through)
@@ -33,12 +34,13 @@ package for browsers and edge runtimes.
 |---|---|---|
 | HTML / XHTML | Supported | `html` (default) |
 | DOCX | Supported | `docx` |
+| PPTX, PPTM, PPSX | Supported | `pptx` |
 | XLSX, XLSM, XLSB, XLS, ODS | Supported | `spreadsheet` |
 | Plain text | Supported | always on |
 | CSV, TSV | Supported | always on |
 | Markdown | Supported | `markdown` |
 | PDF (text layer) | Supported | `pdf` |
-| DOC, PPTX | Detected, rejected explicitly | – |
+| DOC, PPT | Detected, rejected explicitly | – |
 
 ## Quick Start
 
@@ -193,10 +195,11 @@ let markkit = Markkit::builder()
 | `html` | Yes | HTML parsing and conversion |
 | `http_client` | No | URL fetching via reqwest (`extract_url`) |
 | `docx` | No | DOCX conversion (zip + quick-xml) |
+| `pptx` | No | PPTX conversion (zip + quick-xml) |
 | `spreadsheet` | No | XLSX/XLSM, XLS, ODS conversion (calamine) |
 | `pdf` | No | PDF text-layer extraction (hayro-syntax, pure Rust) |
 | `markdown` | No | Markdown normalization (pulldown-cmark) |
-| `all_formats` | No | `html`, `pdf`, `docx`, `spreadsheet`, `markdown` |
+| `all_formats` | No | `html`, `pdf`, `docx`, `pptx`, `spreadsheet`, `markdown` |
 | `tool` | No | `markkit::tool::MarkkitTool` LLM agent tool (Everruns toolkit contract) |
 | `logging` | No | Reserved: pulls in `tracing`, emits no events yet |
 
@@ -207,7 +210,7 @@ Enable it to get `extract_url` (the CLI and the Python/Node bindings ship with i
 [dependencies]
 markkit = { version = "0.1", features = ["http_client"] }
 # office formats only, no HTML, no network:
-# markkit = { version = "0.1", default-features = false, features = ["docx", "spreadsheet"] }
+# markkit = { version = "0.1", default-features = false, features = ["docx", "pptx", "spreadsheet"] }
 ```
 
 ### Resource limits

crates/markkit-cli/Cargo.toml

@@ -23,6 +23,7 @@ default = ["all_formats"]
 all_formats = ["markkit/all_formats"]
 pdf = ["markkit/pdf"]
 docx = ["markkit/docx"]
+pptx = ["markkit/pptx"]
 spreadsheet = ["markkit/spreadsheet"]
 markdown = ["markkit/markdown"]
 

crates/markkit-js/__test__/options.test.cjs

@@ -56,7 +56,7 @@ test("extractDocument returns metadata", async () => {
   assert.equal(out.format, "html");
   assert.deepEqual(out.warnings, []);
   assert.equal(out.title ?? null, null);
-  assert.throws(() => m.extractDocumentSync(Buffer.from("PK"), { fileName: "a.pptx" }), /Unsupported/);
+  assert.throws(() => m.extractDocumentSync(Buffer.from("PK"), { fileName: "a.ppt" }), /Unsupported/);
 });
 
 test("extractDocument exposes page metadata", () => {

crates/markkit/Cargo.toml

@@ -18,6 +18,7 @@ default = ["html"]
 html = ["dep:scraper", "dep:html5ever", "dep:ego-tree", "dep:url"]
 pdf = ["dep:hayro-syntax", "dep:miniz_oxide"]
 docx = ["dep:zip", "dep:quick-xml"]
+pptx = ["dep:zip", "dep:quick-xml"]
 spreadsheet = ["dep:calamine", "dep:zip", "dep:quick-xml", "dep:cfb"]
 markdown = ["dep:pulldown-cmark"]
 # Opt-in: the default build has no network stack (no reqwest/hyper/TLS).
@@ -27,7 +28,7 @@ logging = ["dep:tracing"]
 tool = ["dep:tower", "dep:futures-core", "dep:base64"]
 # JSON Schema for the IR (`markkit::ir::json_schema()`)
 json-schema = ["dep:schemars"]
-all_formats = ["html", "pdf", "docx", "spreadsheet", "markdown"]
+all_formats = ["html", "pdf", "docx", "pptx", "spreadsheet", "markdown"]
 
 [dependencies]
 # Async