Release Format Lab 0.2.0

public/README.md

@@ -4,7 +4,7 @@ Explore conversion paths, state the expected preservation boundary, and measure
 what a representative round trip actually changes. Format Lab is a local-first
 module in the add·ideas Toolbox.
 
-## v0.1.0 capabilities
+## v0.2.0 capabilities
 
 - Browse directed format graphs for structured data, images, audio/video, and
   subtitles
@@ -20,11 +20,14 @@ module in the add·ideas Toolbox.
   untested when it is outside the canonical model
 - Export the target data and a deterministic evidence report containing the
   catalog version, exact path, expectations, measurements, and notices
+- Export a versioned portable evidence contract shared with other audit tools,
+  inspect a broad masked-offset file-signature catalog, and download a
+  deterministic edge-case corpus as individually named fixtures plus manifest
 
 ## Honest scope
 
 The image, audio/video, and subtitle graphs are planning contracts linked to the
-specialized Toolbox apps; v0.1.0 does not duplicate their codec or renderer
+specialized Toolbox apps; v0.2.0 does not duplicate their codec or renderer
 engines. Catalog statuses are conservative expectations, not measurements of a
 particular file or encoder. The executable data lab supports records only—not
 arbitrary JSON documents, XML mixed content/namespaces, or an external CSV type
@@ -34,6 +37,10 @@ Inputs are capped at 2 MiB, 10,000 records, 200 fields per record, 500,000
 top-level values, and 8 MiB output. CSV cells are strings and spreadsheet-formula
 prefixes are neutralized; the resulting semantic change is visible in the
 round-trip measurement.
+Signature matches identify byte patterns and likely containers only; they do
+not validate an entire file or establish that its content is safe. Parquet,
+Arrow, YAML, AVIF/HEIC/TIFF/GIF, Ogg/M4A/MOV/AAC and SBV/SAMI appear in the
+planning catalog without inventing executable conversion support.
 
 ## Development