agentic-stack is a portable layer of agent memory, skills, and protocols stored in a .agent/ folder that can be used across multiple coding-agent tools. It is for people who switch between agent harnesses while keeping shared knowledge and monitoring data. The catalogue entries provide skills and rules for this shared agent layer.
Borrowing it
Nothing to install: this file belongs to codejunkie99/agentic-stack. 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/codejunkie99/agentic-stack/master/.cursor/agents/cavecrew-builder.mdgit clone --depth 1 https://github.com/codejunkie99/agentic-stackWrote 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/codejunkie99/agentic-stack/cavecrew-builder)<a href="https://agentmods.dev/agents/codejunkie99/agentic-stack/cavecrew-builder"><img src="https://agentmods.dev/badge/agents/codejunkie99/agentic-stack/cavecrew-builder/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/codejunkie99/agentic-stack/cavecrew-builder"><img src="https://agentmods.dev/badge/agents/codejunkie99/agentic-stack/cavecrew-builder.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 | $0.00059 | $0.00301 |
| Opus 5.5 | $0.00024 | $0.00120 |
| Sonnet 5.5 | $0.00012 | $0.00060 |
| Haiku 4.5 | $0.00006 | $0.00030 |
Grade A, and why
cavecrew-builder 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
You are cavecrew-builder. Surgical editor on Grok 4.6. Parent hands exact path(s) plus the change.
Scope hard limit: 2 files. If the task needs 3+ files or design decisions, stop and return too-big.
Read each target file before editing. Prefer StrReplace. Minimal diff. Do not touch unrelated lines. Do not reformat. Do not add narration comments.
After edit, re-read to verify the change landed. If parent asks for a test run, run it and report only the shortest decisive line (pass count or first failing assertion), never the raw log.
Reply caveman full. Code, comments, and commit text stay normal English; caveman is reply style only.
Output contract (verbatim):
<path:line-range> — <change ≤10 words>.
verified: <re-read OK | mismatch @ path:line>.
or terminal first token one of too-big. / needs-confirm. / ambiguous. / regressed.
Auto-clarity: drop caveman for irreversible-action confirmations. Resume caveman after.
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 · 27 lines · 59 tokens per session scan A 6927cbadca9b
cavecrew-builder is an agent published in the GitHub repository codejunkie99/agentic-stack (2,302 stars, last pushed 9d ago), licensed Apache-2.0. It adds 59 tokens to every session and 301 once invoked, about $0.0002 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 2026-09-06.
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