Borrowing it
Nothing to install: this file belongs to lukacf/meerkat. 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/lukacf/meerkat/main/.claude/skills/meerkat-wasm/SKILL.mdgit clone --depth 1 https://github.com/lukacf/meerkatWrote 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/skills/lukacf/meerkat/meerkat-wasm)<a href="https://agentmods.dev/skills/lukacf/meerkat/meerkat-wasm"><img src="https://agentmods.dev/badge/skills/lukacf/meerkat/meerkat-wasm/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/skills/lukacf/meerkat/meerkat-wasm"><img src="https://agentmods.dev/badge/skills/lukacf/meerkat/meerkat-wasm.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 | $0.00136 | $0.02796 |
| Opus 5 | $0.00068 | $0.01398 |
| Sonnet 5 | $0.00027 | $0.00559 |
| Haiku 4.5 | $0.00014 | $0.00280 |
Grade B, and why
meerkat-wasm scanned grade B with 1 finding 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 4d 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.
Recursive force deletemediumDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
2. **cargo clean scope**: `cargo clean -p <crate>` only cleans native. Use `rm -rf target/wasm32-unknown-unknown`. Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Meerkat WASM Embedded Runtime
The meerkat-web-runtime crate compiles the full meerkat agent stack to wasm32-unknown-unknown. It is an embedded deployment target for mobpacks — the JavaScript equivalent of the Rust SDK. Not a protocol server like RPC/REST.
Crate Compatibility Pattern
To make a meerkat crate compile for wasm32, apply this pattern:
Cargo.toml — gate platform-specific deps:
[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
tokio = { workspace = true }
rusqlite = { workspace = true }
[target.'cfg(target_arch = "wasm32")'.dependencies]
tokio_with_wasm = { workspace = true }
lib.rs — tokio alias + module gating:
#[cfg(target_arch = "wasm32")]
pub mod tokio { pub use tokio_with_wasm::alias::*; }
#[cfg(not(target_arch = "wasm32"))]
mod filesystem_module;
async_trait — dual cfg_attr:
#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
Time types — use meerkat_core::time_compat::{SystemTime, Instant, Duration}, never std::time::*.
Tokio imports in wasm32-visible code — add #[cfg(target_arch = "wasm32")] use crate::tokio; then existing use tokio::... paths resolve through the alias.
Override-First Resource Injection
AgentBuildConfig has 4 override fields. When set, build_agent() uses them directly, skipping filesystem resolution. On wasm32, these are always set.
| Field | Skips | wasm32 default |
|---|---|---|
tool_dispatcher_override |
Shell/file/project tool resolution | CompositeDispatcher::new_wasm() |
session_store_override |
Feature-flag store creation | No-op store |
hook_engine_override |
Filesystem hook config | None |
skill_engine_override |
Filesystem/git skill resolution | None |
FactoryAgentBuilder has default_tool_dispatcher and default_session_store — injected into ALL build_agent() calls including mob-spawned sessions.
Runtime mode on wasm32
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago Changed db4ecef6a68e
- 10d ago First seen · 201 lines · 136 tokens per session scan B 119501fdda00
meerkat-wasm is a skill published in the GitHub repository lukacf/meerkat (20 stars, last pushed today), licensed Apache-2.0. It adds 136 tokens to every session and 2,796 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it B with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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