Skill

build-iso

Use when the user wants to build a UDF/ISO9660 hybrid image for one batch before burning, so the same image can be reused across multiple disc copies.

npx claudepluginhub danielrosehill/claude-code-plugins --plugin batch-optical-archivist

Tool Access

This skill uses the workspace's default tool permissions.

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Build a single ISO image for one planned batch using `xorriso`. UDF + Joliet + Rock Ridge for broad compatibility (Linux, macOS, Windows).

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Build ISO

Build a single ISO image for one planned batch using xorriso. UDF + Joliet + Rock Ridge for broad compatibility (Linux, macOS, Windows).

When to use

Before burn-disc when burning more than one copy of the same batch (build once, burn many).

When the user wants an ISO they can verify or archive separately from the physical media.

Inputs to gather

Batch number (e.g. 01) or explicit graftpoints file.

Volume label — default ARCHIVE-YYYYMMDD-NN. Must be uppercase, max 32 chars for UDF, max 16 for strict ISO9660 — xorriso will warn.

Workspace — default current job folder.

Procedure

Resolve workspace and locate $WORKSPACE/batches/disc-NN/filelist-graftpoints.txt.

Ensure $WORKSPACE/iso/ exists.

Run:

xorriso -as mkisofs \
  -udf -r -J \
  -V "ARCHIVE-$(date +%Y%m%d)-NN" \
  -o "$WORKSPACE/iso/disc-NN.iso" \
  -graft-points $(cat "$WORKSPACE/batches/disc-NN/filelist-graftpoints.txt")

For long graftpoints lists, pass via -path-list instead to avoid argv overflow.

After build, run xorriso -indev disc-NN.iso -toc to confirm the image is readable.

Print final ISO size and compare to planned batch size — flag any unexpected discrepancy >1%.

Output / side effects

$WORKSPACE/iso/disc-NN.iso

Stdout: build duration, final size, volume label.

Safety / constraints

Never overwrite an existing ISO without confirmation if it differs in size.

Requires xorriso installed (apt install xorriso).