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 skills/hjertefolger/cortex/cortex-setupnpx skills add hjertefolger/cortex --skill cortex-setupgit clone --depth 1 https://github.com/hjertefolger/cortexWhat 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 | $0.00011 | $0.00398 |
| Opus 5 | $0.00005 | $0.00199 |
| Sonnet 5 | $0.00002 | $0.00080 |
| Haiku 4.5 | $0.00001 | $0.00040 |
Grade A, and why
cortex-setup 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 2d 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
Cortex Setup Wizard
Initialize Cortex for first-time use.
Setup Steps
1. Initialize System
Run the internal setup command to create directories and database:
node ${CLAUDE_PLUGIN_ROOT}/dist/index.js setup
2. Configure Preferences
Ask the user to choose a configuration preset:
Question: How would you like Cortex to behave?
-
Full Automation (Recommended)
- Protection: Saves seamlessly while you work (every 5% context).
- Clear Safety: Automatically saves backup before you clear context.
- Visuals: Shows "Saved" notifications.
-
Balanced
- Protection: Saves less frequently (every 10%).
- Clear Safety: Automatically saves backup before clear.
- Visuals: Standard status bar.
-
Silent Mode
- Protection: Manual saving only.
- Clear Safety: Automatically saves backup before clear.
- Visuals: Hidden status bar.
3. Apply Preset
Based on the user's choice (1, 2, or 3), apply the corresponding preset:
If "1" or "Full":
node ${CLAUDE_PLUGIN_ROOT}/dist/index.js configure full
If "2" or "Balanced":
node ${CLAUDE_PLUGIN_ROOT}/dist/index.js configure essential
If "3" or "Silent":
node ${CLAUDE_PLUGIN_ROOT}/dist/index.js configure minimal
4. Finish
Print the success message: "✅ Cortex is ready! Now restart Claude Code to enable memory tools."
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.
- 2d ago First seen · 66 lines · 11 tokens per session scan A 27205fe1f3fb
cortex-setup is a skill published in the GitHub repository hjertefolger/cortex (174 stars, last pushed 5mo ago), licensed MIT. It adds 11 tokens to every session and 398 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.
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