ketchup

ketchup is a skill for Claude Code from ericlitman/open-pstack. It costs 42 tokens per session (595 once invoked), scanned A, a copy of ketchup, MIT.

A chat catch-up command that summarizes what happened since the user’s last message and highlights decisions or actions that still need the user.

In plain words
What is it for?
Use it after time away from a chat to review changes, pull requests, checks, agent work, and outstanding decisions.
Why use it?
It removes the need to reread the conversation and separates completed work from items that are waiting for approval or input.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: mentions subagents.

Part of the pstack plugin — 59 skills, 22 agents, 1 hook shipped together

Good fit Use it after time away from a chat to review changes, pull requests, checks, agent work, and outstanding decisions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ericlitman/open-pstack/ketchup
Install

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.

Any agent
npx skills add ericlitman/open-pstack --skill ketchup
Clone the repo
git clone --depth 1 https://github.com/ericlitman/open-pstack

Made for: Claude Code.

Or install pstack, the plugin that ships this one along with the rest of its 59 skills, 22 agents, 1 hook.

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.

agentmods badge for ketchup

README.md
[![agentmods](https://agentmods.dev/badge/skills/ericlitman/open-pstack/ketchup/github.svg)](https://agentmods.dev/skills/ericlitman/open-pstack/ketchup)
Your own site
<a href="https://agentmods.dev/skills/ericlitman/open-pstack/ketchup"><img src="https://agentmods.dev/badge/skills/ericlitman/open-pstack/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.

agentmods 80×15 button for ketchup

Your own site · 80×15
<a href="https://agentmods.dev/skills/ericlitman/open-pstack/ketchup"><img src="https://agentmods.dev/badge/skills/ericlitman/open-pstack/ketchup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 595 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 88% copy Near-identical to another mod 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.00595
Opus 5.5 $0.00017 $0.00238
Sonnet 5.5 $0.00008 $0.00119
Haiku 4.5 $0.00004 $0.00060

Measured 3d ago against content hash 3b00c552fdb2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 3d 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.

Origin

This is a copy

88% identical to ketchup — 29 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/pstack/skills/ketchup/SKILL.md · 28 lines

How it starts

The opening of the file, as written. The whole thing — 28 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Ketchup

Catch the user up on everything in this chat since the last message they wrote before /ketchup. Notifications and subagent results are not their messages. Write in the plain voice of /bro, and skip its restating step. Assume the user remembers their last message and nothing after it. Call each PR, branch, or agent by a name they would know, not by a label you invented during the work.

Gather what changed

Keep this turn read-only, except for visuals you make for the reply from what you already have. Do not change code, start an app or a job, or post anything to make them. Collect your own work since that message, reports from subagents, and messages from anyone else in this chat. Check the current state of each PR, CI run, or agent this chat touched. Say which are still running and which you could not check.

An action item is a decision or step only the user can take, such as a product choice, an approval, an irreversible action, or access you lack. Include any still waiting on the user, even one raised before their last message. Work you can still do yourself is not an action item.

Write the reply

Open with one sentence that says how many action items there are, or that there are none. If nothing happened and nothing waits on the user, say so and stop.

Then say what happened, most important first. Give each result and what it means for the user. Skip steps that changed nothing. Name in one line any work left that you can do yourself.

Then give each action item a short executive summary. Cover the decision to make, why it matters now, the options and what each costs, your recommendation, and what happens if the user does not answer. If you do not know a part, say so instead of guessing. Link to the detail when there is one, and write the summary so the user can decide without opening it.

Show each action item as a before and after, side by side. For a choice, put the current state beside each option, or the options alone when there is no current state. Use screenshots or a video when the change is visible. Otherwise use another artifact, such as a table of numbers, a diff, or a diagram. If no visual exists yet, make one. If you cannot, say plainly that none exists. Never invent a number, and never draw or generate a picture of a screen you did not capture. Link only artifacts that exist.

Read the full file on GitHub · 28 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.

  1. 3d ago Changed · +4 lines 3b00c552fdb2
  2. 4d ago First seen · 24 lines · 42 tokens per session scan A f460a861cf21

Subscribe to this mod's changes

ketchup is a skill published in the GitHub repository ericlitman/open-pstack (420 stars, last pushed today), licensed MIT. It adds 42 tokens to every session and 595 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 88% identical to ketchup, differing in 29 lines, and is treated as a copy.

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