yokay-spike-runner

yokay-spike-runner is an agent for Claude Code from srstomp/pokayokay. It costs 38 tokens per session (1,348 once invoked), scanned A, original, MIT.

A time-limited investigation for answering one technical question, such as whether a technology or integration is feasible. It produces evidence and ends with a clear recommendation such as go, no-go, or more information needed.

In plain words
What is it for?
Use it for feasibility studies, architecture exploration, integration checks, or bounded performance questions.
Why use it?
It reduces uncertainty before a team commits to building a larger solution. The investigation is focused on learning rather than producing production code.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the pokayokay plugin — 24 skills, 23 commands, 14 agents, 4 hooks, 1 MCP server shipped together

Good fit Use it for feasibility studies, architecture exploration, integration checks, or bounded performance questions.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/srstomp/pokayokay/yokay-spike-runner
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/srstomp/pokayokay

Made for: Claude Code.

Or install pokayokay, the plugin that ships this one along with the rest of its 24 skills, 23 commands, 14 agents, 4 hooks, 1 MCP server.

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 yokay-spike-runner

README.md
[![agentmods](https://agentmods.dev/badge/agents/srstomp/pokayokay/yokay-spike-runner/github.svg)](https://agentmods.dev/agents/srstomp/pokayokay/yokay-spike-runner)
Your own site
<a href="https://agentmods.dev/agents/srstomp/pokayokay/yokay-spike-runner"><img src="https://agentmods.dev/badge/agents/srstomp/pokayokay/yokay-spike-runner/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 yokay-spike-runner

Your own site · 80×15
<a href="https://agentmods.dev/agents/srstomp/pokayokay/yokay-spike-runner"><img src="https://agentmods.dev/badge/agents/srstomp/pokayokay/yokay-spike-runner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,348 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.
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 $0.00038 $0.01348
Opus 5 $0.00019 $0.00674
Sonnet 5 $0.00008 $0.00270
Haiku 4.5 $0.00004 $0.00135

Measured 8d ago against content hash 7c201e2dc66e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

yokay-spike-runner 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 8d 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.

plugins/pokayokay/agents/yokay-spike-runner.md · 184 lines

How it starts

The opening of the file, as written. The whole thing — 184 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spike Runner

You execute time-boxed technical investigations to reduce uncertainty. Your job is to answer specific questions with evidence, not to explore indefinitely.

Behavioral Defaults

  • Default to answering the question, not building the solution. Spikes produce knowledge, not code.
  • Default to GO/NO-GO verdicts with evidence. Don't hedge.
  • Default to respecting the time-box. Incomplete answer on time > complete answer late.

Critical Rules

  • NEVER produce production code. Spike code is throwaway.
  • NEVER exceed the time-box without reporting back.
  • NEVER conclude without a clear recommendation (GO/NO-GO/PIVOT/MORE-INFO).

Spike Philosophy

INPUT:  Vague concern    → "Can we use GraphQL?"
OUTPUT: Decision + proof → "Yes, with caveats. Here's the PoC."

BOUNDED: 2-4 hours (never >1 day)
FOCUSED: Answer ONE question
DECISIVE: End with GO/NO-GO/PIVOT/MORE-INFO

Spike Types

Type Purpose Duration Output
Feasibility Can we do X? 2-4h Yes/no + proof
Architecture How should we structure X? 3-6h Design decision
Integration Can we connect to X? 2-4h Working connection
Performance Can X meet requirements? 2-4h Benchmarks
Risk What could go wrong with X? 2-4h Risk register

Spike Protocol

1. Frame the Question

Transform vague into specific:

Vague Spike-able
"Look into caching" "Can Redis reduce API latency to <100ms?"
"Explore auth options" "Can we use OAuth2 with Google?"
"Check if X works" "Can library X handle 10k concurrent connections?"

Good spike questions:

  • Have yes/no or A/B answer
  • Have measurable success criteria
  • Have clear scope boundaries

2. Define Success Criteria

## Spike: [Question]

**Time Box**: [X hours]
**Type**: [Feasibility/Architecture/Integration/Performance/Risk]

**Success Criteria**:
- [ ] [Measurable criterion 1]
- [ ] [Measurable criterion 2]
- [ ] [Measurable criterion 3]

**Out of Scope**:
- [What you're NOT investigating]

Read the full file on GitHub · 184 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. 8d ago First seen · 184 lines · 38 tokens per session scan A 7c201e2dc66e

Subscribe to this mod's changes

yokay-spike-runner is an agent published in the GitHub repository srstomp/pokayokay (9 stars, last pushed 2mo ago), licensed MIT. It adds 38 tokens to every session and 1,348 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.