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 skills/2233admin/reverse-skill-evolver/competition-race-condition-state-driftnpx skills add 2233admin/reverse-skill-evolver --skill competition-race-condition-state-driftgit clone --depth 1 https://github.com/2233admin/reverse-skill-evolverWrote 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/2233admin/reverse-skill-evolver/competition-race-condition-state-drift)<a href="https://agentmods.dev/skills/2233admin/reverse-skill-evolver/competition-race-condition-state-drift"><img src="https://agentmods.dev/badge/skills/2233admin/reverse-skill-evolver/competition-race-condition-state-drift.svg" alt="Measured on agentmods" 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 | $0.00105 | $0.00556 |
| Opus 5 | $0.00053 | $0.00278 |
| Sonnet 5 | $0.00021 | $0.00111 |
| Haiku 4.5 | $0.00011 | $0.00056 |
Grade A, and why
competition-race-condition-state-drift 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.
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.
This is a copy
100% identical to competition-race-condition-state-drift — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Competition Race Condition State Drift
Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.
Use this skill when the decisive behavior depends on request timing, async ordering, lock gaps, or stale state.
Reply in Simplified Chinese unless the user explicitly requests English.
Quick Start
- Identify mutable state first: rows, cache keys, queue payloads, session fields, counters, or files.
- Reproduce with smallest concurrent sequence and fixed timing assumptions.
- Capture one baseline run and one racing run with only one variable changed.
- Track read, check, write, enqueue, and commit boundaries separately.
- Prove final state drift from a clean reset.
Workflow
1. Map Mutable Boundaries
- Record transaction scope, lock behavior, retry logic, idempotency keys, cache invalidation, and queue handoff.
- Note where read-check-write is split across requests, workers, or services.
- Keep each boundary tied to exact timestamps or sequence numbers.
2. Reproduce Timing Window
- Build deterministic concurrent inputs with controlled delay, duplicate requests, or reordered worker execution.
- Compare accepted and rejected paths under identical payloads.
- Record which condition flips when ordering changes.
3. Reduce To Decisive Race Chain
- Compress to: request A and B ordering -> stale check or lock gap -> conflicting writes -> resulting capability or artifact.
- State whether root cause is missing lock, weak idempotency, stale cache read, delayed async commit, or retry side effect.
- If the path becomes queue-dominant, hand off to queue worker drift skill.
Read This Reference
- Load
references/race-condition-state-drift.mdfor race harness ideas, evidence blocks, and parity checks.
What To Preserve
- Mutable keys, transaction boundaries, lock behavior, and idempotency markers
- Timestamped or sequenced traces for baseline and race runs
- One minimal replayable concurrent sequence proving drift
What ships with it
2 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.
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.
- 5d ago First seen · 51 lines · 105 tokens per session scan A 94338b6e6354
competition-race-condition-state-drift is a skill published in the GitHub repository 2233admin/reverse-skill-evolver (13 stars, last pushed 25d ago), licensed MIT. It adds 105 tokens to every session and 556 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to competition-race-condition-state-drift, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
local-ai-agents
Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…
next-cache-components-adoption
Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…
next-cache-components-optimizer
Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…
next-partial-prefetching-adoption
Turn on Partial Prefetching in a Next.js app and work through the insights it surfaces. Use when the user wants to enable or adopt Partial Prefetching, flip the partialPrefetching flag, opt routes in with export const prefetch = 'partial', audit Link prefetch={true} behavior, preserve existing prefetched UI with…
chronicle
Analyze Copilot session history for standup reports, usage tips, session search, and session reindexing. Use when the user asks for a standup, daily summary, usage tips, workflow recommendations, wants to search or find past sessions by keyword/file/PR, wants to reindex their session store, or asks about deleting…