Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add mindboard/indesign-extendscript-plugins --skill idmlgit clone --depth 1 https://github.com/mindboard/indesign-extendscript-pluginsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mindboard/indesign-extendscript-plugins/idml)<a href="https://agentmods.dev/skills/mindboard/indesign-extendscript-plugins/idml"><img src="https://agentmods.dev/badge/skills/mindboard/indesign-extendscript-plugins/idml/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mindboard/indesign-extendscript-plugins/idml"><img src="https://agentmods.dev/badge/skills/mindboard/indesign-extendscript-plugins/idml.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00081 | $0.02590 |
| Opus 5.5 | $0.00032 | $0.01036 |
| Sonnet 5.5 | $0.00016 | $0.00518 |
| Haiku 4.5 | $0.00008 | $0.00259 |
Grade A, and why
idml scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
IDML Unpack / Pack (XML editing)
An IDML (.idml) file is Adobe InDesign Markup — a ZIP package of XML
files (an OCF container, the same family as EPUB). Unpacking it gives you a tree
of human- and AI-readable XML you can read, diff, and edit directly, then pack
back into a valid .idml that InDesign opens.
This skill uses Python 3 (stdlib only) — no pip install, nothing to set
up. Python is the right tool here: it's already on macOS, and editing the
unpacked XML is exactly what Claude is good at. The companion script is
scripts/idmlutil.py.
Sibling skill:
indddrives a live InDesign app via ExtendScript. Useidml(this one) when you want to manipulate the file's XML offline without launching InDesign; useinddwhen you need InDesign to render, export (PDF/PNG), or convert IDML↔INDD.
The one rule that makes an IDML valid
A plain zip -r out.idml folder/ produces a file InDesign rejects. The
package must contain a mimetype entry that is:
- the first entry in the archive, and
- STORED (uncompressed), holding exactly
application/vnd.adobe.indesign-idml-package.
InDesign reads those magic bytes from a fixed offset, so order and compression
matter. idmlutil.py pack does this for you (every other file is DEFLATED).
Always repack with this script, never with a generic zip command.
How to run it
# Extract an .idml into a folder of XML (default folder: ./workspace)
python3 skills/idml/scripts/idmlutil.py unpack /abs/path/in.idml /abs/path/out_dir
# Repack a folder back into a valid .idml (default folder: ./workspace)
python3 skills/idml/scripts/idmlutil.py pack /abs/path/out.idml /abs/path/src_dir
- The 3rd argument (folder) is optional and defaults to
./workspace. unpackclears the destination folder first, so each extraction is clean.packreads themimetypefrom the source folder if present, otherwise writes the standard constant; it skips.DS_Store.- Prefer absolute paths.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 190 lines · 81 tokens per session scan A 3a8d5998ec70
idml is a skill published in the GitHub repository mindboard/indesign-extendscript-plugins (4 stars, last pushed 1mo ago), licensed MIT. It adds 81 tokens to every session and 2,590 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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