agentmods.dev

realtime-systems-coding

realtime-systems-coding is a skill for Claude Code, Codex from oghie/skillsets. It costs 108 tokens per session (1,809 once invoked), scanned A, original, MIT.

Guidance for building software whose correctness depends on timing, parallel work, communication, or synchronization. It covers systems such as concurrent services, network data paths, kernels, and real-time programs.

In plain words
What is it for?
Use it to design, implement, review, debug, test, profile, or port concurrent, distributed, high-performance, network, kernel-level, and real-time software.
Why use it?
It makes execution order, shared data, communication, timing limits, and correctness requirements explicit before code is changed. This helps avoid races, deadlocks, missed signals, and other concurrency failures.

Skill for Claude CodeCodex

Part of the skillsets plugin — 9 skills, 4 commands, 1 hook, 4 MCP servers shipped together

not rated 9 1mo ago A scan 108 tokens original MIT
View the source file oghie/skillsets
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.

agentmods
npx agentmods add skills/oghie/skillsets/realtime-systems-coding
Any agent
npx skills add oghie/skillsets --skill realtime-systems-coding
Clone the repo
git clone --depth 1 https://github.com/oghie/skillsets

Made for: Claude Code, Codex.

Or install skillsets, the plugin that ships this one along with the rest of its 9 skills, 4 commands, 1 hook, 4 MCP servers.

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 realtime-systems-coding

README.md
[![agentmods](https://agentmods.dev/badge/skills/oghie/skillsets/realtime-systems-coding.svg)](https://agentmods.dev/skills/oghie/skillsets/realtime-systems-coding)
Your own site
<a href="https://agentmods.dev/skills/oghie/skillsets/realtime-systems-coding"><img src="https://agentmods.dev/badge/skills/oghie/skillsets/realtime-systems-coding.svg" alt="Measured on agentmods" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,809 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00108 $0.01809
Opus 5 $0.00054 $0.00905
Sonnet 5 $0.00022 $0.00362
Haiku 4.5 $0.00011 $0.00181

Measured 5d ago against content hash 0445902815d3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

realtime-systems-coding 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 5d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/concurrency_static_scan.py, scripts/schedulability.py, scripts/tooling_probe.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/realtime-systems-coding/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Realtime Systems Coding

Core Rule

Treat every task as a state, timing, and synchronization contract. Identify the execution units, shared state, communication mode, timing limits, platform abstraction level, and correctness properties before writing or changing code.

Knowledge Grounding

  • Use references/knowledge-map.md for the conceptual map.
  • Use references/shared-memory-synchronization.md for locks, semaphores, monitors, condition variables, and Java/POSIX patterns.
  • Use references/mutual-exclusion-algorithms.md for Dijkstra conditions, refinement flow, Dekker, Peterson, N-process filters, busy waiting, and custom mutual exclusion proof.
  • Use references/monitor-signalling-semantics.md for AS, SC, SX, SW, SU, signal stealing, urgent queues, nested monitor calls, and monitor verification rules.
  • Use references/exercise-derived-patterns.md for canonical synchronization pseudocode: monitor semaphores, rendezvous, encoded-count buffers, readers-writers, bridge traffic, dining philosophers, priority allocation, FIFO/SJF queues, controller wakeups, and service pipelines.
  • Use references/message-passing-distributed.md for rendezvous, buffered/non-blocking communication, MPI, and SPMD systems.
  • Use references/distributed-programming-models.md for CSP guarded commands, alternative/repetitive orders, lack of fairness, RPC/RMI, remote invocation, and rendezvous entry points.
  • Use references/realtime-scheduling-analysis.md for clocks, timers, drift, task attributes, RMS, EDF, blocking, priority inversion, and aperiodic servers.
  • Use references/network-dataplane-and-kernel-bypass.md for DPDK, VPP, eBPF, XDP, AF_XDP, Linux TC, RSS, NAPI, IRQ suspension, SR-IOV, RoCEv2/RDMA, SmartNIC/DPU offload, TCP handoff, and IOAM-style telemetry.
  • Use references/flow-and-diagram-patterns.md when a diagram, timeline, proof flow, monitor queue model, message-passing sequence, or Gantt-style task model would make the work safer.
  • Use references/development-environments/abstraction-level-map.md before choosing ASIC/FPGA, accelerator/offload, bare-metal, VM, container, or edge targets.

Read the full file on GitHub · 79 lines

Files

What ships with it

40 files 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.

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. 5d ago First seen · 79 lines · 108 tokens per session scan A 0445902815d3

Subscribe to this mod's changes

realtime-systems-coding is a skill published in the GitHub repository oghie/skillsets (9 stars, last pushed 1mo ago), licensed MIT. It adds 108 tokens to every session and 1,809 once invoked, about $0.0005 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.

Backend and APIsacademic-writingagent-skillsclaudecodexconcurrent-programmingdevice-driver
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