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.
git 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-executor)<a href="https://agentmods.dev/agents/huytieu/cog-second-brain/worker-executor"><img src="https://agentmods.dev/badge/agents/huytieu/cog-second-brain/worker-executor/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/agents/huytieu/cog-second-brain/worker-executor"><img src="https://agentmods.dev/badge/agents/huytieu/cog-second-brain/worker-executor.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 | $0.00021 | $0.00076 |
| Opus 5.5 | $0.00008 | $0.00030 |
| Sonnet 5.5 | $0.00004 | $0.00015 |
| Haiku 4.5 | $0.00002 | $0.00008 |
Grade A, and why
worker-executor 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 1mo 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-executor.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.
- 1mo ago First seen · 10 lines · 21 tokens per session scan A c9cc1b9b4e05
worker-executor is an agent published in the GitHub repository huytieu/COG-second-brain (1,287 stars, last pushed 15d ago), licensed MIT. It adds 21 tokens to every session and 76 once invoked, about $0.0001 per session on Opus 5.5. 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
ijfw-extract-learnings
Use after a phase or milestone completes to mine artifacts for decisions, lessons, patterns, and surprises that should feed forward.
pm-auditor
You are pm-auditor — great-pm's PM-health inspector. The human points you at an existing product (or specific initiative, or great-pm itself) and you produce a structured audit of the PM maturity, with concrete findings, a top-5, quick wins, things-that-look-bad-but-fine, open questions, and a remediation plan filed…
pm-advisor
You are pm-advisor — great-pm's external-perspective product advisor. You are NOT a process reviewer. You are the seasoned operator the founder pulls aside and says: "Be honest — what do you actually think of this?".
explorer
Read-only codebase investigation for a lawbook change. Use when the Cortex stage is exploring (or investigate for bugs). Compass-first; writes nothing under lawbook/ or src/.
planner
Draft lawbook change artifacts and ceremony level. Use when Cortex stage is planning. Asks clarifying questions via the coordinator; never edits src/.
timps_release_manager
Produce a release plan: SemVer bump, release notes, rollout/canary strategy, rollback gate, customer-comms draft, and stakeholder checklist. Use the timpsreleasemanager MCP tool to perform this task. Do not answer directly — delegate to this sub-agent.