Borrowing it
Nothing to install: this file belongs to lktiep/cortex-hub. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/lktiep/cortex-hub/master/CLAUDE.mdgit clone --depth 1 https://github.com/lktiep/cortex-hubWrote 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/instructions/lktiep/cortex-hub/claude-md)<a href="https://agentmods.dev/instructions/lktiep/cortex-hub/claude-md"><img src="https://agentmods.dev/badge/instructions/lktiep/cortex-hub/claude-md/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/instructions/lktiep/cortex-hub/claude-md"><img src="https://agentmods.dev/badge/instructions/lktiep/cortex-hub/claude-md.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 | $0.00517 | $0.00517 |
| Opus 5.5 | $0.00207 | $0.00207 |
| Sonnet 5.5 | $0.00103 | $0.00103 |
| Haiku 4.5 | $0.00052 | $0.00052 |
Grade A, and why
cortex-hub CLAUDE.md 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 today.
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 Hub — Claude Code Instructions
Start (MANDATORY)
A prompt usually arrives with a "Cortex session … is open" note: the hook already started the
session with the prompt as the task, and the note holds the recall (knowledge, memory) and the
first lookup (files, lines and the symbols they fall in). Read those lines next, with no separate
search first. Without the note, once you know the task:
cortex_session_start(repo: "https://github.com/lktiep/cortex-hub.git", task: "<the task in a few words>"),
which answers the same. Edits are blocked until one of the two.
Tech Stack
Monorepo: pnpm + Turborepo. TypeScript strict. Hono API. Next.js 15 frontend. SQLite + Qdrant. Docker Compose.
Code Conventions
camelCase vars/functions, PascalCase types. @cortex/* path aliases. No any without comment.
Finding code
- A symbol name →
cortex_code_context(name). A behaviour →cortex_code_search(query): scan the whole list, the target is not always first. An exact literal →rg; in the organization's other repos →cortex_code_grep. - Read just the lines a hit names (Read with offset/limit), not the whole file.
cortex_code_impact(target)before changing something exported or shared.
When something breaks
cortex_knowledge_search and cortex_memory_search with the error first. Store a non-obvious fix
with cortex_knowledge_store(title, content).
Quality Gates (before committing)
pnpm build && pnpm typecheck && pnpm lint(full build, never--filter) in one command, after the last edit: a later write closes the commit gate again.cortex_detect_changes(diff: "<git diff --staged -U0 | grep -E '^(diff |--- |\+\+\+ |@@ )'>").risk_level: "unknown"means a lookup failed, not that the change is safe.- After pushing:
cortex_code_reindex(repo: "cortex-hub", branch: "<branch>").
Hub genuinely unreachable: echo '<reason>' > .cortex/.session-state/gate-off (recorded).
End a session with /ce.
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.
- today Changed · -103 lines · -1,690 tokens per session 04374ea5932e
- yesterday Changed · +19 lines · +459 tokens per session 9b537c5200a4
- 24d ago Changed · +53 lines · +970 tokens per session 63390aedeaec
- 1mo ago First seen · 73 lines · 778 tokens per session scan A e29a4e966970
cortex-hub CLAUDE.md is an instructions file published in the GitHub repository lktiep/cortex-hub (93 stars, last pushed today), licensed MIT. It adds 517 tokens to every session, about $0.0021 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.
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