COG is an AI-assisted second brain that stores knowledge in Markdown files and uses agents, skills, and version control to evolve it over time. It helps people manage knowledge and contacts while supporting several coding-agent tools; the catalogue entries are COG’s skills, agents, instructions, rules, and plugin surfaces.
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/huytieu/cog-second-brain/worker-data-collectorgit clone --depth 1 https://github.com/huytieu/COG-second-brainWrote 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/huytieu/cog-second-brain/worker-data-collector)<a href="https://agentmods.dev/agents/huytieu/cog-second-brain/worker-data-collector"><img src="https://agentmods.dev/badge/agents/huytieu/cog-second-brain/worker-data-collector.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 | $0.00028 | $0.00084 |
| Opus 5 | $0.00014 | $0.00042 |
| Sonnet 5 | $0.00006 | $0.00017 |
| Haiku 4.5 | $0.00003 | $0.00008 |
Grade A, and why
worker-data-collector 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 6d 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
Read .claude/agents/worker-data-collector.md and adopt that role exactly, including its Output Rule — write results
to a file and return only a short status plus the file path.
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.
- 6d ago First seen · 10 lines · 28 tokens per session scan A f75e691c4298
worker-data-collector is an agent published in the GitHub repository huytieu/COG-second-brain (1,170 stars, last pushed 11d ago), licensed MIT. It adds 28 tokens to every session and 84 once invoked, about $0.0001 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.
Other agents, from other repositories
security-auditor
Agent "security-auditor" from WaterplanAI/agentic-config, covering security auditor agent, persona, workflow, constraints and output format.
provisioner
Agent "provisioner" from WaterplanAI/agentic-config, covering provisioner agent, persona, workflow, constraints and input parameters.
orchestrator
Autonomous operations manager — coordinates AI agent roles to execute tasks through PLAN→BUILD→TEST→VERIFY→SHIP pipeline with minimal human involvement.
frontend-developer
Use this agent for frontend planning, reviews, and refactors in this repository. Focus on the frontend source tree, shared UI, i18n boundaries, and the build/runtime constraints documented in AGENTS.md and LAWS.md.
product-strategy-analyst
Use this agent for product discovery, scope definition, and requirement shaping before implementation in this repository.
backend-developer
Use this agent for backend planning, reviews, and refactors in this repository. Focus on the backend source and test trees, migration wiring, and the service/workflow boundaries documented in AGENTS.md and LAWS.md.