ENH: Add verify-meca pixi task

Verify the submitted article bundle can be reproduced.

Author: thewtex

README.md

@@ -94,6 +94,7 @@ The project uses [Pixi](https://pixi.sh) for dependency management and task auto
 | `build-manuscript` | Build HTML, PDF, and citation file |
 | `build-pdfs` | Build both Typst and arXiv PDFs |
 | `build-meca` | Create complete [MECA] archive for journal submission |
+| `verify-meca` | Build MECA and verify bundle reproducibility |
 | `build` | **Main build task** - builds manuscript and tests project |
 
 ### Development Tasks
@@ -156,6 +157,12 @@ pixi run -e cxx test-project
 pixi run build-meca
 ```
 
+**Verify MECA bundle reproducibility:**
+```bash
+# Build MECA, unpack it, and verify the bundle builds correctly
+pixi run verify-meca
+```
+
 ## License
 
 All source code in this repository is distributed under the Apache 2.0

pixi.toml

@@ -43,6 +43,16 @@ build-manuscript = { depends-on = ["build-html", "build-pdf", "build-cff"] }
 build-pdfs = { depends-on = ["build-pdf", "build-arxiv"] }
 build-meca = { cmd = "myst build --meca", depends-on = ["build-html", "build-pdfs", "build-tex", "build-docx", "build-cff"] }
 
+# Verify MECA bundle reproducibility
+verify-meca = { cmd = '''
+  myst build --meca &&
+  rm -rf exports/manuscript.meca &&
+  unzip exports/manuscript.meca.zip -d exports/manuscript.meca &&
+  cd exports/manuscript.meca/bundle &&
+  pixi run build &&
+  pixi run test
+''', depends-on = ["build-meca"], description = "Build MECA export and verify bundle reproducibility" }
+
 # Start development server
 start = "myst start"
 # Alias