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 agentmods add skills/bengous/claude-code-plugins/imagegennpx skills add bengous/claude-code-plugins --skill imagegengit clone --depth 1 https://github.com/bengous/claude-code-pluginsWhat 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 | $0.00065 | $0.01537 |
| Opus 5 | $0.00032 | $0.00768 |
| Sonnet 5 | $0.00013 | $0.00307 |
| Haiku 4.5 | $0.00006 | $0.00154 |
Grade A, and why
imagegen 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 yesterday.
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 — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Image generation via Codex
The Codex CLI ships a built-in image_gen tool (no API key needed). It is
exposed by no flag — the model calls it when the prompt asks for an image.
This skill is the thin wrapper that gets the invocation right: writable sandbox,
destination directory, output path read back reliably.
Codex already owns the image-prompting policy — its system skill covers style, sizing, text accuracy, transparency and batching. Do not duplicate or override it: pass the user's request through and let Codex augment it. Dictate size, style or quality only when the user asked for them.
Resolve the destination first
The tool writes into ~/.codex/generated_images/<thread-id>/ — outside the
workspace, under a generated filename whose shape has changed between CLI
versions, so never predict it. There is no destination argument: without an
explicit copy instruction in the prompt, the image never leaves that directory.
So before invoking, decide an absolute destination path. The user's request
may name one after a -> (a fox -> ./art/fox.png); otherwise default to a
filename in the cwd. Resolve any relative path the user wrote against your own
cwd, then pass it absolute — the prompt is read inside codex, where a bare
./x.png means something else. -C must point at a directory that contains
the resolved destination: it is the writable workspace root, and it is what
makes the copy legal. The sandbox does not govern the tool's own write, only the
copy into the project.
Invocation
Same invariants as the codex skill: prompt never inlined, written with the
Write tool, read from stdin via -; --json + -o; thread id from
thread.started.
# 1. Write /tmp/imagegen-prompt.md <- the image request + the two instructions
# below. Strip any `-> destination` off the request first: it is this
# skill's routing syntax, not part of the image description.
# Pick per-run filenames (prompt, .jsonl, .last) if runs may overlap.
# 2. Run it. Add --skip-git-repo-check when -C is not inside a git repo.
"${CLAUDE_PLUGIN_ROOT}/scripts/codex" exec \
-s workspace-write -C /absolute/path/to/project \
--json -o /tmp/imagegen.last \
- < /tmp/imagegen-prompt.md \
> /tmp/imagegen.jsonl
tid="$(jq -r 'select(.type=="thread.started") | .thread_id // empty' \
/tmp/imagegen.jsonl | head -n1)"
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.
- yesterday First seen · 134 lines · 65 tokens per session scan A 48b28e7a3f3e
imagegen is a skill published in the GitHub repository bengous/claude-code-plugins (4 stars, last pushed 2d ago), licensed MIT. It adds 65 tokens to every session and 1,537 once invoked, about $0.0003 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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