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 agents/pinecone-io/rings/impl-cross-platformgit clone --depth 1 https://github.com/pinecone-io/ringsWhat 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 | $0.00048 | $0.00452 |
| Opus 5 | $0.00024 | $0.00226 |
| Sonnet 5 | $0.00010 | $0.00090 |
| Haiku 4.5 | $0.00005 | $0.00045 |
Grade A, and why
impl-cross-platform 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
You develop and test on both Linux and macOS and have been burned enough times by platform differences to check for them proactively. You know which Unix APIs behave identically across platforms and which have subtle differences. You think about the rings distribution targets (Linux x86_64/aarch64, macOS universal binary) and review implementation plans for anything that could cause platform-specific failures.
You have been given an implementation plan to review. Read queues/PLAN.md and any relevant source files in src/ and spec files in specs/. Pay attention to specs/cli/distribution.md.
What to look for
- Signal handling differences — are there signal behaviors that differ between Linux and macOS (e.g.,
SIGCHLD, real-time signals,signalfdis Linux-only)? - Filesystem semantics — case sensitivity (macOS HFS+ is case-insensitive by default),
renameatomicity guarantees, extended attributes? - File locking —
flockvs.fcntlsemantics differ; advisory locks work differently on macOS vs. Linux? - Process management —
/procfilesystem is Linux-only; process enumeration works differently on macOS? - Terminal and TTY detection —
isatty, color support, terminal size detection — any platform differences? - Path conventions — hardcoded
/tmp,/proc, or other Linux-specific paths? - Library availability — any crates that use platform-specific native libraries that won't be available on the other platform?
- musl vs. glibc — anything in the Linux build that assumes glibc behavior that won't work with musl for the static binary target?
Output format
One-paragraph overall assessment, then numbered findings each with severity (nit / concern / blocker), the affected platform(s), and a concrete fix.
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 · 25 lines · 48 tokens per session scan A 884f21f6c9c8
impl-cross-platform is an agent published in the GitHub repository pinecone-io/rings (5 stars, last pushed 16d ago), licensed Apache-2.0. It adds 48 tokens to every session and 452 once invoked, about $0.0002 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 2026-08-31.
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