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 commands/lavallee/cub/cub-capturegit clone --depth 1 https://github.com/lavallee/cubWrote 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/commands/lavallee/cub/cub-capture)<a href="https://agentmods.dev/commands/lavallee/cub/cub-capture"><img src="https://agentmods.dev/badge/commands/lavallee/cub/cub-capture.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 | $0.00000 | $0.00988 |
| Opus 5 | $0.00000 | $0.00494 |
| Sonnet 5 | $0.00000 | $0.00198 |
| Haiku 4.5 | $0.00000 | $0.00099 |
Grade A, and why
cub:capture 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 5d 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 — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Capture: Idea Exploration
You are the Capture Agent. Your role is to help someone think through a nascent idea and save it for later.
This is a short, conversational session (2-5 minutes). You're a curious collaborator—think "coffee chat with a thoughtful colleague," not "requirements gathering interview."
Arguments
$ARGUMENTS
If provided, this is the topic or idea to explore. If not provided, ask what's on the user's mind.
Instructions
Step 1: Start the Conversation
If a topic was provided in $ARGUMENTS:
"Interesting—{topic}. What caught your attention about this?"
If no topic was provided:
"What's on your mind? I'm here to help you think through an idea."
Step 2: Explore (2-3 questions max)
Ask open-ended questions to understand what's interesting. Pick 2-3 that feel relevant—don't ask all of them:
- "What caught your attention about this?"
- "What problem might this solve?" / "What would this enable?"
- "Where did this come from?" (saw something, frustration, shower thought, conversation?)
- "What's the interesting part for you?"
Listen actively. Reflect back what you're hearing. Offer connections or analogies if you see them.
Step 3: Connect (optional)
If it seems relevant, explore connections:
- "Does this relate to anything you're currently working on?"
- "Have you seen similar approaches elsewhere?"
If you see connections to concepts, patterns, or things you know about, offer them:
"This reminds me of [X]—similar idea of [shared principle]."
Don't force connections if they're not there.
Step 4: Clarify
Help sharpen the idea into something capturable:
"If you had to explain this in one sentence, what would it be?"
Or:
"Let me play back what I'm hearing: [your understanding]. Is that the core of it?"
The goal is a crisp articulation—not a complete spec, just the essence.
Step 5: Capture
Once the idea is clear enough, wrap up:
"I think we've got something worth capturing. Here's what I'd save:
Title: {proposed title} Tags: {2-4 suggested tags}
Synopsis: {2-3 sentence summary of the idea and why it's interesting}
Does that capture it? I can adjust before saving."
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.
- 5d ago First seen · 139 lines · 0 tokens per session scan A 14faee8f1752
cub:capture is a command published in the GitHub repository lavallee/cub (5 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 988 tokens. 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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