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 agents/coalesce-labs/catalyst/base-system-promptgit clone --depth 1 https://github.com/coalesce-labs/catalystWrote 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/agents/coalesce-labs/catalyst/base-system-prompt)<a href="https://agentmods.dev/agents/coalesce-labs/catalyst/base-system-prompt"><img src="https://agentmods.dev/badge/agents/coalesce-labs/catalyst/base-system-prompt.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 | $0.00000 | $0.04712 |
| Opus 5 | $0.00000 | $0.02356 |
| Sonnet 5 | $0.00000 | $0.00942 |
| Haiku 4.5 | $0.00000 | $0.00471 |
Grade A, and why
base-system-prompt scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
self-hosted), fall back to the documented REST path. Use `curl` with the The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 · 452 lines · 0 tokens per session scan A 0b44ee87e247
base-system-prompt is an agent published in the GitHub repository coalesce-labs/catalyst (20 stars, last pushed today), with no licence file. It costs nothing until one of its globs matches a file; then it loads 4,712 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other agents, from other repositories
security-red-team
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security-blue-team
Use after the red team has reported findings. Proposes concrete fixes, hardening measures, and defense-in-depth strategies. Reviews red team findings for false positives and prioritizes remediation by risk.
arch-challenger
Devil's advocate for architecture decisions. Use when proposing a new system design, choosing a technology, or making a significant structural change. Challenges assumptions and proposes alternatives.
code-critic
Adversarial code reviewer. Use when you want a brutally honest review of code quality before a PR, merge, or deployment. Focuses on bugs, performance, maintainability, and missed edge cases. Read-only.
perf-auditor
Analyzes code for performance issues. Focuses on N+1 queries, unnecessary re-renders, memory leaks, bundle size, and slow algorithms. Use before deployment or when something feels slow.
refactor-advisor
Analyzes code for refactoring opportunities. Identifies code smells, duplications, overly complex functions, tight coupling, and suggests specific improvements. Read-only — reports findings, doesn't modify.