Use only when a decision is blocked on a fact nobody has. One time-boxed question, one answer.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Spike
A spike answers one question so a decision can be made. Write one only when a decision is actually blocked on it.
## Steps
1. Write the question so the answer is a fact, not an opinion. "Can the queue delay a job by 24 hours without a new table?" is a spike. "What is the best queue design?" is an options question.
2. Set a time box and a method. Throwaway code is allowed and expected.
3. If the question is answerable from the web or docs, answer it with the `research-web` skill. If it needs the repo or a running system, give a fresh-context subagent the question to answer with the `gather-evidence` skill. Give the subagent the question and the time box only.
4. Record the answer and the evidence.
5. Feed the answer back into the options document under "What we learned". Re-rank the options if it changes them.
## Format
Plain text in the page bundle (see `page`), for example `spikes/{slug}.md`:
```
# Spike: {one question}
Blocks: {which decision and options}
Time box:
Method:
Throwaway allowed: yes
## Done when
An answer, not a feature.
## Answer
## Evidence
Feeds back to: {options link}
```
## Banned
…
The line at the top of this page pins the label git:20260924.c3bd4b5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (1434 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
dcouple/pane · 577 stars · license a license file GitHub does not identify · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lb2pedsk52mu2lnp
GET https://markdownregistry.com/api/v1/resolve?ref=dcouple/pane/spike
GET https://markdownregistry.com/api/v1/blob/5955f241be9e7963abd7637b6d075a83eca4c296487f93653de2ec4dd78959e1
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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