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Agent skill

Spike Guidance Forked

by testdouble in testdouble/han

OI-3 spike harness — the FORKED (context fork) readability-guidance variant.

MITAuto-check passedWriting & Content

Install Spike Guidance Forked

skills CLI
$ npx skills add testdouble/han --skill spike-guidance-forked -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install testdouble/han spike-guidance-forked --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/testdouble/han.git skills-src && mkdir -p .claude/skills && cp -r skills-src/docs/plans/han-communication-plugin/artifacts/oi-3-spike/harness-skills/spike-guidance-forked .claude/skills/spike-guidance-forked && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
spike-guidance-forked
GitHub stars
279
Token cost
~527 tokens
SKILL.md length
273 words
Files
1
Skills in repo
54
Repo updated
First seen
Licence
MIT

At a glance

OI-3 spike harness — the FORKED (context fork) readability-guidance variant.

  • Tasks that involve Plain language and style rules
  • SKILL.md covers The audience frame (drafting…, What the standard requires and Self-check criteria…
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Spike Guidance Forked is an agent skill from testdouble/han. OI-3 spike harness — the FORKED (context fork) readability-guidance variant. Same payload as the inline variant but declared to run in a forked context. Use only when a spike consumer skill invokes it.

Its SKILL.md is about 530 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Writing & Content, covering Plain language and style rules. The repository describes itself as: Han: AI skills and agents for "Solo" product engineers and small teams. The licence is MIT.

When your agent uses it

  • Tasks that involve Plain language and style rules

Example prompts

  • “/spike-guidance-forked”

Requirements

  • Pre-approved tools (allowed-tools): Read

What it can do on your machine

Read from SKILL.md and the folder at commit abba73a. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Spike Guidance Forked loads about 527 tokens when it runs. Until then it costs about 56 tokens; SKILL.md has 273 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~56
When it runs · the whole SKILL.md, loaded when a task matches
~527

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from testdouble/han at commit abba73a, republished under its MIT licence (© testdouble). 273 words, ~527 tokens.

Download SKILL.mdSave it as .claude/skills/spike-guidance-forked/SKILL.md (or your agent's skills folder).
name
spike-guidance-forked
description
OI-3 spike harness — the FORKED (context fork) readability-guidance variant. Same payload as the inline variant but declared to run in a forked context. Use only when a spike consumer skill invokes it.
allowed-tools
Read
context
fork

Readability Guidance (forked variant)

You have invoked the readability-guidance skill to source the shared writing standard before you draft prose. Apply it while you draft, then RETURN to the workflow that called you — this guidance is a means to writing your deliverable, not the deliverable itself.

Emit the line SPIKE_GUIDANCE_MARKER_5R8_FORKED once, to confirm the guidance rendered, then continue.

The audience frame (drafting stage)

While drafting, write for a capable reader who did not do this work and lacks the author's context. This single instruction is the most practical lever for plain output: it steers away from insider shorthand, unstated assumptions, and the author's own mental model.

What the standard requires

  • Main point first. The opening line states the bottom line. A reader who stops after one sentence still gets the answer.
  • One idea per paragraph. Each paragraph carries one idea; its first sentence carries the weight.
  • Descriptive headings. Each heading names its content ("Why the request times out," not "Analysis").
  • Short, active sentences. Roughly fifteen to twenty words on average; few past twenty-five.
  • Common words. Prefer the common word over the technical synonym.
  • Numbered lists for steps, bullets for the rest.
  • Progressive disclosure. Reveal the core first and detail in layers.

Self-check criteria (post-draft stage)

After the draft exists, check: does the opening line state the main point? Does each paragraph carry one idea? Does each heading name its content? Any sentence past about thirty words is a candidate to split.

The standard is now surfaced into your context. Do not treat this guidance as your final answer. Proceed to the next step of the skill that invoked you and produce its deliverable.

© testdouble, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in docs/plans/han-communication-plugin/artifacts/oi-3-spike/harness-skills/spike-guidance-forked of testdouble/han.

Open the folder on GitHubat commit abba73a

Compare with similar skills

Spike Guidance Forked next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Spike Guidance Forked compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Spike Guidance Forked this skilltestdouble/han279—~527Automated safety check: PassMIT
Asd Ste100danyuchn/asd-ste100-skill4k—~4.1kAutomated safety check: PassMIT
Simple Issue Descriptionevery-app/open-seo23k1 repos~1.2kAutomated safety check: PassMIT
Ponytail AuditDietrichGebert/ponytail158k—~1.3kAutomated safety check: PassMIT
Technical Writing Standardcursor/plugins10k10 repos~2.4kAutomated safety check: PassNone
Natural Japanese Business Writingcoji/natural-japanese1.9k—~2.1kAutomated safety check: PassMIT

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Categories

Questions about Spike Guidance Forked

What does Spike Guidance Forked do?

OI-3 spike harness — the FORKED (context fork) readability-guidance variant. Spike Guidance Forked is an agent skill from testdouble/han. OI-3 spike harness — the FORKED (context fork) readability-guidance variant.

When should I use Spike Guidance Forked?

Spike Guidance Forked fits situations like: tasks that involve Plain language and style rules.

How do I install Spike Guidance Forked in Claude Code?

Run `npx skills add testdouble/han --skill spike-guidance-forked -a claude-code`. Or copy the skill folder (docs/plans/han-communication-plugin/artifacts/oi-3-spike/harness-skills/spike-guidance-forked in testdouble/han) into .claude/skills/spike-guidance-forked in your project. Claude Code loads it when a task matches its description.

How do I install Spike Guidance Forked in Codex?

Run `npx skills add testdouble/han --skill spike-guidance-forked -a codex`. Or copy the skill folder (docs/plans/han-communication-plugin/artifacts/oi-3-spike/harness-skills/spike-guidance-forked in testdouble/han) into .agents/skills/spike-guidance-forked in your project. Codex loads it when a task matches its description.

Can I use Spike Guidance Forked in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add testdouble/han --skill spike-guidance-forked -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/spike-guidance-forked, .gemini/skills/spike-guidance-forked, .github/skills/spike-guidance-forked and .opencode/skills/spike-guidance-forked in your project.

What does Spike Guidance Forked need to run?

SKILL.md names no scripts, command-line tools or credentials: Spike Guidance Forked is instructions for the agent only. Its frontmatter pre-approves these tools: Read.

Does Spike Guidance Forked access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Spike Guidance Forked safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Spike Guidance Forked use?

Spike Guidance Forked is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Spike Guidance Forked use?

About 527 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Spike Guidance Forked?

Skills that share tags, products or a category with Spike Guidance Forked: Asd Ste100 (danyuchn/asd-ste100-skill, 4k stars), Simple Issue Description (every-app/open-seo, 23k stars), Ponytail Audit (DietrichGebert/ponytail, 158k stars) and Technical Writing Standard (cursor/plugins, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Spike Guidance Forked?

testdouble (a GitHub organization) maintains it in testdouble/han, which has 279 GitHub stars. The repository holds 54 skills in this directory. The repository was last updated on October 1, 2026.

Source: testdouble/han on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.