cavekit is a Claude Code plugin that organizes software changes through a compact, spec-driven workflow stored in a SPEC.md file. It is for developers who want to plan, research, review, and build changes while preserving project context across sessions; the catalogue entries are its skills, commands, plugin configuration, and workflow rules.
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/JuliusBrussee/cavekitWrote 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/commands/juliusbrussee/cavekit/spec)<a href="https://agentmods.dev/commands/juliusbrussee/cavekit/spec"><img src="https://agentmods.dev/badge/commands/juliusbrussee/cavekit/spec/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/commands/juliusbrussee/cavekit/spec"><img src="https://agentmods.dev/badge/commands/juliusbrussee/cavekit/spec.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 | $0.00018 | $0.00172 |
| Opus 5.5 | $0.00007 | $0.00069 |
| Sonnet 5.5 | $0.00004 | $0.00034 |
| Haiku 4.5 | $0.00002 | $0.00017 |
Grade A, and why
spec 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
Invoke the spec skill (skills/spec/SKILL.md). Treat $ARGUMENTS as the mode:
an idea → NEW, from-code → DISTILL, bug: <cause> → BACKPROP, amend <§X.n> →
targeted edit. spec is the sole mutator — it also writes the handoff blocks that
grill (§G/§C), research (§R), review (§V), and deepen (§I/§V/§T) produce. Caveman
encoding per FORMAT.md; sectioned ownership; show a diff, write on OK.
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 · 11 lines · 18 tokens per session scan A 484430ad3395
spec is a command published in the GitHub repository JuliusBrussee/cavekit (1,155 stars, last pushed 2mo ago), licensed MIT. It adds 18 tokens to every session and 172 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 commands, from other repositories
cc-checkpoint
(Conductor) Save session decisions, conventions, and debt to memory.
cc-stack
(Conductor) Detect the project stack and write commands + a generated ruleset into CLAUDE.md.
cc-review
(Conductor) Review code changes against spec and standards.
cc-debug
(Conductor) Systematically diagnose and fix a bug.
cc-docs
(Conductor) Audit and update project documentation.
cc-test
(Conductor) Analyze coverage gaps and write missing tests.