Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add augchan42/inkstone/plugin install inkstoneWrote 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/augchan42/inkstone/swapping-pptx-templates)<a href="https://agentmods.dev/skills/augchan42/inkstone/swapping-pptx-templates"><img src="https://agentmods.dev/badge/skills/augchan42/inkstone/swapping-pptx-templates.svg" alt="Measured on agentmods" 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 | $0.00079 | $0.01147 |
| Opus 5 | $0.00039 | $0.00574 |
| Sonnet 5 | $0.00016 | $0.00229 |
| Haiku 4.5 | $0.00008 | $0.00115 |
Grade A, and why
swapping-pptx-templates 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 7d 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 — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Swapping PPTX Templates
Overview
Moving a deck's content into a different template's look. PowerPoint has no "reflow into another template" operation, so this is a slide-by-slide rebuild in raw OOXML. This skill is the judgment layer on top of the mechanical workflow.
REQUIRED BACKGROUND: Use the official pptx skill (Anthropic document-skills plugin)
for the unpack → add_slide → edit → clean → pack mechanics and its scripts. This skill
covers the four things that skill does NOT warn about, each of which caused a real defect.
The four non-obvious rules
1. Redesign, don't relocate
A "template" usually ships 3-5 generic layouts (title / banded-header / framed-card / blank), not equivalents of the source's custom diagrams. Copy-pasting shapes drags the source's colors and geometry into the new deck. Instead: extract each slide's content (text, data, image refs) and rebuild the visual from scratch in the template's palette, using its layouts only as background/chrome. Match content type to the closest layout; layer plain text boxes + shapes on top for anything beyond title+body.
2. Never hand-type CJK (or any non-ASCII) as numeric XML entities
Deriving 住... decimal codepoints from memory for Chinese/Japanese/Korean text is
the single highest-risk step. Each wrong codepoint decodes to a valid but wrong
character (圈→圭, 驗→鰓, 輪→載), so pack/validate never errors and the corruption is silent.
- Get ground truth:
python -m markitdown source.pptx > source_text.md - Insert CJK by script substitution from that file (
str.replace), never by typing entities or characters into an edit by hand. - Before packing, run the audit (path in Claude Code shown; elsewhere use the repo path):
AUDIT="$CLAUDE_PLUGIN_ROOT/skills/swapping-pptx-templates/scripts/audit_cjk.py"
python "$AUDIT" source_text.md <build_dir> # exit 1 = suspicious chars, stop and fix
It flags any CJK char in the build absent from the source (near-zero false positives).
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.
- 7d ago First seen · 83 lines · 79 tokens per session scan A 4eb94d948a11
swapping-pptx-templates is a skill published in the GitHub repository augchan42/inkstone (4 stars, last pushed 11d ago), licensed MIT. It adds 79 tokens to every session and 1,147 once invoked, about $0.0004 per session on Opus 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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