spike

spike is a skill for Claude Code from me2resh/apexyard. It costs 33 tokens per session (3,541 once invoked), scanned A, original, MIT.

A workflow for creating a spike ticket: a short, time-limited experiment designed to answer an uncertain technical question. The ticket records the hypothesis, time budget, conditions for stopping, and what happens after the experiment.

In plain words
What is it for?
Use it to test whether a library, user experience, or integration is viable before committing to a full feature.
Why use it?
It gives exploratory work a clear purpose and limit, so uncertain ideas do not become open-ended development or unfinished production code.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; mentions Claude Code.

Good fit Use it to test whether a library, user experience, or integration is viable before committing to a full feature.

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Install with agentmods
npx agentmods add skills/me2resh/apexyard/spike
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.

Any agent
npx skills add me2resh/apexyard --skill spike
Clone the repo
git clone --depth 1 https://github.com/me2resh/apexyard

Made for: Claude Code.

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 spike

README.md
[![agentmods](https://agentmods.dev/badge/skills/me2resh/apexyard/spike/github.svg)](https://agentmods.dev/skills/me2resh/apexyard/spike)
Your own site
<a href="https://agentmods.dev/skills/me2resh/apexyard/spike"><img src="https://agentmods.dev/badge/skills/me2resh/apexyard/spike/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 spike

Your own site · 80×15
<a href="https://agentmods.dev/skills/me2resh/apexyard/spike"><img src="https://agentmods.dev/badge/skills/me2resh/apexyard/spike.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,541 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Rogue Agent · line 38
    Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.
    Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
  • high Tool Misuse · line 59
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
How audits are shown
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 $0.00033 $0.03541
Opus 5 $0.00016 $0.01770
Sonnet 5 $0.00007 $0.00708
Haiku 4.5 $0.00003 $0.00354

Measured 6d ago against content hash f670b1b8da39, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

spike 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 6d 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.

.claude/skills/spike/SKILL.md · 322 lines

How it starts

The opening of the file, as written. The whole thing — 322 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/spike — Create a Spike Ticket

Creates a structured GitHub Issue for a spike — a 1-3 day hypothesis-driven exploration whose goal is to answer a technical question with minimum investment, with the explicit understanding that the code will be discarded or substantially rewritten once the answer is clear.

When to use a spike vs a feature. If you can answer the question through reasoning alone, file a /feature. If you genuinely don't know whether an approach will work — does this library scale, does this UX make sense, will this integration handle our load — file a /spike first. The spike's output is the answer; once it's in, file a fresh [Feature] ticket with production-shaped delivery (or a memo if the answer was no). See workflows/sdlc.md § Phase 1 for the gating heuristic.

Path resolution

Read the registry path via portfolio_registry, the per-project docs dir via portfolio_projects_dir, and the ideas backlog via portfolio_ideas_backlog — all from .claude/hooks/_lib-portfolio-paths.sh. Source the helper at the top of any bash block that touches those paths:

source "$(git rev-parse --show-toplevel)/.claude/hooks/_lib-read-config.sh"
source "$(git rev-parse --show-toplevel)/.claude/hooks/_lib-portfolio-paths.sh"
registry=$(portfolio_registry)

Defaults match today's single-fork layout (./apexyard.projects.yaml, ./projects, ./projects/ideas-backlog.md). Adopters in split-portfolio mode override the portfolio.{registry, projects_dir, ideas_backlog} keys in .claude/project-config.json. Don't hardcode literal apexyard.projects.yaml or projects/ paths in bash blocks — the helper resolves whichever mode the adopter is in. See docs/multi-project.md.

Usage

/spike Will library X handle 10k events/sec
/spike Does Postgres LISTEN/NOTIFY scale to N consumers
/spike Can we replace Auth0 with Cognito

Process

0. Write the active-issue-skill marker (REQUIRED — me2resh/apexyard#268)

Before any gh issue create (or other tracker CLI), write this skill's name to the active-issue-skill marker so require-skill-for-issue-create.sh lets the command through. At skill entry:

Read the full file on GitHub · 322 lines

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. 6d ago First seen · 322 lines · 33 tokens per session scan A f670b1b8da39

Subscribe to this mod's changes

spike is a skill published in the GitHub repository me2resh/apexyard (498 stars, last pushed today), licensed MIT. It adds 33 tokens to every session and 3,541 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 2026-09-03.

Related

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