What is ai-psd-thumbnails CLAUDE.md?

Repository instructions for ai-psd-thumbnails, a Windows extension that shows thumbnails and previews for design files such as Illustrator and Photoshop documents. They describe its Rust components, Windows integration, supported formats and installer.

Working on file decoding and rendering, Windows thumbnail and preview components, COM registration, installer actions and development registration scripts.

They provide the technical boundaries needed to change the extension without breaking its Windows shell integration, rendering paths or installer.

How teexiii/ai-psd-thumbnails configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to teexiii/ai-psd-thumbnails. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/teexiii/ai-psd-thumbnails/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/teexiii/ai-psd-thumbnails

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/teexiii/ai-psd-thumbnails/claude-md/github.svg)](https://agentmods.dev/instructions/teexiii/ai-psd-thumbnails/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/teexiii/ai-psd-thumbnails/claude-md"><img src="https://agentmods.dev/badge/instructions/teexiii/ai-psd-thumbnails/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/teexiii/ai-psd-thumbnails/claude-md"><img src="https://agentmods.dev/badge/instructions/teexiii/ai-psd-thumbnails/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,442 This file is loaded in full into every session.

When invoked 2,442 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.02442	$0.02442
Opus 5.5	$0.00977	$0.00977
Sonnet 5.5	$0.00488	$0.00488
Haiku 4.5	$0.00244	$0.00244

Measured 2mo ago against content hash c438fb5591bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ai-psd-thumbnails CLAUDE.md 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 2mo 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.

CLAUDE.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ai-psd-thumbnails

Windows Explorer thumbnail + preview-pane shell extension for .ai .psd .psb .eps .svg (plus thumbnail-only .pdf), written in Rust (windows-rs), shipped as a per-machine x64 MSI. Design rationale lives in plans/260610-1131-thumb-viewer-shell-extension/; this file is the operational reference.

Architecture

crates/core          ai-psd-thumbnails-core   — pure decode/render, NO Win32 (unit-testable)
crates/shell         ai-psd-thumbnails-shell  — cdylib `thumb_viewer.dll`, COM in-proc server
crates/installer-ca  installer-ca        — MSI custom-action exe (2 verbs, see Installer)
installer/           WiX v4 authoring + build script
scripts/             dev register/unregister/cache-clear (elevated PowerShell)
third_party/bin/     pdfium.dll (bundled binary, see Pin below)

COM objects (both ThreadingModel=Apartment):

Object	CLSID	Interfaces
Thumbnail provider	`{90E3822E-5F70-40BF-884E-77544797AD41}`	IThumbnailProvider, IInitializeWithStream
Preview handler	`{2CFC1F9E-0B23-48C3-AE46-29025209D0D4}`	IPreviewHandler, IInitializeWithStream, IObjectWithSite, IOleWindow

Format → render path:

Format	Fast path	Fallback
`.psd`	resource 1036 embedded JPEG thumb (RGB; 1033 = old BGR)	flattened composite
`.psb`	same (Image Resources section layout identical to PSD)	composite (RLE counts widen to 4 bytes)
`.ai` (PDF-style)	pdfium page-1 render	—
`.ai` (EPS-style)	DOS-EPS TIFF → `%AI_Thumbnail` → XMP `xmpGImg` JPEG	Ghostscript subprocess
`.eps`	DOS-EPS embedded TIFF preview → XMP `xmpGImg` JPEG	Ghostscript subprocess
`.svg`	resvg/usvg (external hrefs disabled, dims capped)	—
`.pdf`	pdfium page-1 render (same route as PDF-style `.ai`; magic `%PDF` → `Ext::Ai`)	—

Build

cargo build -p ai-psd-thumbnails-core                  # decode lib only
cargo build -p ai-psd-thumbnails-shell --release       # → target/release/thumb_viewer.dll

Read the full file on GitHub · 159 lines

Changes

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.

2mo ago First seen · 159 lines · 2,442 tokens per session scan A c438fb5591bb

Subscribe to this mod's changes

ai-psd-thumbnails CLAUDE.md is an instructions file published in the GitHub repository teexiii/ai-psd-thumbnails (20 stars, last pushed 2mo ago), licensed MIT. It adds 2,442 tokens to every session, about $0.0098 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.

Design and UX adobe-illustrator eps photoshop preview-handler shell-extension

ai-psd-thumbnails CLAUDE.md next to 6 instructions from other repositories
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ai-psd-thumbnails: Instructions file for Claude Code