monitor-debug-shm

monitor-debug-shm is a cursor rule for Cursor from TACC/HPCPerfStats. It costs 0 tokens per session (747 once invoked), scanned B, original, LGPL-2.1.

A DEBUG-only rule for mirroring complete monitor messages into `/dev/shm`, Linux's shared-memory file system, with security gates and tests.

In plain words
What is it for?
It helps developers inspect full monitor messages during debugging and verify the behavior with tests.
Why use it?
It makes diagnostic message capture predictable while limiting when sensitive or temporary data is exposed.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit It helps developers inspect full monitor messages during debugging and verify the behavior with tests.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/tacc/hpcperfstats/monitor-debug-shm
Install

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.

Clone the repo
git clone --depth 1 https://github.com/TACC/HPCPerfStats

Made for: Cursor.

Wrote 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.

agentmods badge for monitor-debug-shm

README.md
[![agentmods](https://agentmods.dev/badge/rules/tacc/hpcperfstats/monitor-debug-shm/github.svg)](https://agentmods.dev/rules/tacc/hpcperfstats/monitor-debug-shm)
Your own site
<a href="https://agentmods.dev/rules/tacc/hpcperfstats/monitor-debug-shm"><img src="https://agentmods.dev/badge/rules/tacc/hpcperfstats/monitor-debug-shm/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.

agentmods 80×15 button for monitor-debug-shm

Your own site · 80×15
<a href="https://agentmods.dev/rules/tacc/hpcperfstats/monitor-debug-shm"><img src="https://agentmods.dev/badge/rules/tacc/hpcperfstats/monitor-debug-shm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 747 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00747
Opus 5.5 $0.00000 $0.00299
Sonnet 5.5 $0.00000 $0.00149
Haiku 4.5 $0.00000 $0.00075

Measured 12d ago against content hash 10eb34e32218, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

monitor-debug-shm 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 12d 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.

- **Dir resilience**: each write calls `stats_buffer_debug_shm_ensure_dir()` → `ensure_private_dir` so a mid-run `rm -rf` of the mirror dir is recreated on the next sample/schema write — daemon does not abort; reject non

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

monitor/cursor-rules/monitor-debug-shm.mdc · 45 lines

The source is not reproduced here

Licensed LGPL-2.1

The repository is licensed LGPL-2.1, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

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.

  1. 12d ago Changed · +6 lines 10eb34e32218
  2. 1mo ago Changed 5b2493ad97ed
  3. 2mo ago First seen · 39 lines · 0 tokens per session scan B dec59aaee4b8

Subscribe to this mod's changes

monitor-debug-shm is a cursor rule published in the GitHub repository TACC/HPCPerfStats (60 stars, last pushed today), licensed LGPL-2.1. It costs nothing until one of its globs matches a file; then it loads 747 tokens. 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 2026-09-03.