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 oliver-kriska/claude-elixir-phoenix/plugin install catchupWrote 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/oliver-kriska/claude-elixir-phoenix/ketchup)<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/ketchup"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/ketchup/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/oliver-kriska/claude-elixir-phoenix/ketchup"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/ketchup.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 | $0.00037 | $0.00346 |
| Opus 5 | $0.00018 | $0.00173 |
| Sonnet 5 | $0.00007 | $0.00069 |
| Haiku 4.5 | $0.00004 | $0.00035 |
Grade A, and why
ketchup 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 10d 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.
What it actually says
Ketchup 🍅 — alias for /catchup
You found the easter egg. /ketchup is a 1:1 alias for /catchup —
condiment-grade catch-up, no behavior change.
Iron Laws
- Behave identically to
/catchup— this file adds nothing; it only forwards. Never diverge from the canonical skill. - Pass
$ARGUMENTSthrough verbatim — same flags, same defaults.
Execution
- Read
${CLAUDE_PLUGIN_ROOT}/skills/catchup/SKILL.md. - Execute that workflow exactly, with this invocation's
$ARGUMENTSpassed through unchanged (--since,--sources,--depth,--focusall behave the same). - In the brief's footer line, you may render the generator as
/ketchup 🍅instead of/catchup— the only cosmetic difference.
That's it. One condiment, same nutrition.
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.
- 10d ago First seen · 31 lines · 37 tokens per session scan A acc99594abb8
ketchup is a skill published in the GitHub repository oliver-kriska/claude-elixir-phoenix (542 stars, last pushed 4d ago), licensed MIT. It adds 37 tokens to every session and 346 once invoked, about $0.0002 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 2026-08-30.
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