ia-refine-prompt

ia-refine-prompt is a skill for Claude Code from iliaal/whetstone. It costs 45 tokens per session (1,522 once invoked), scanned A, a copy of refine-prompt, MIT.

A process for turning a vague request into a precise set of instructions for an AI system. It checks the task, constraints, output format, context, examples, and edge cases before rewriting it.

In plain words
What is it for?
Use it to improve prompts, write system instructions, define expected outputs, add missing context and constraints, and check whether an instruction can be followed without clarification.
Why use it?
It removes ambiguity that can lead to incomplete, incorrectly formatted, or out-of-scope AI responses.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: names the AskUserQuestion tool; mentions Claude Code; mentions Codex.

Part of the whetstone plugin — 32 skills, 22 commands, 19 agents, 1 hook, 1 MCP server shipped together

Good fit Use it to improve prompts, write system instructions, define expected outputs, add missing context and constraints, and check whether an instruction can be followed without clarification.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/iliaal/whetstone/ia-refine-prompt
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 iliaal/whetstone --skill ia-refine-prompt
Clone the repo
git clone --depth 1 https://github.com/iliaal/whetstone

Made for: Claude Code.

Or install whetstone, the plugin that ships this one along with the rest of its 32 skills, 22 commands, 19 agents, 1 hook, 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 ia-refine-prompt

README.md
[![agentmods](https://agentmods.dev/badge/skills/iliaal/whetstone/ia-refine-prompt/github.svg)](https://agentmods.dev/skills/iliaal/whetstone/ia-refine-prompt)
Your own site
<a href="https://agentmods.dev/skills/iliaal/whetstone/ia-refine-prompt"><img src="https://agentmods.dev/badge/skills/iliaal/whetstone/ia-refine-prompt/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 ia-refine-prompt

Your own site · 80×15
<a href="https://agentmods.dev/skills/iliaal/whetstone/ia-refine-prompt"><img src="https://agentmods.dev/badge/skills/iliaal/whetstone/ia-refine-prompt.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,522 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 92% copy Near-identical to another mod 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 $0.00045 $0.01522
Opus 5 $0.00023 $0.00761
Sonnet 5 $0.00009 $0.00304
Haiku 4.5 $0.00005 $0.00152

Measured 5d ago against content hash a875f8bea28d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ia-refine-prompt 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.

Origin

This is a copy

92% identical to refine-prompt — 2 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.

plugins/whetstone/skills/ia-refine-prompt/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Refining Prompts

Process

  1. Assess -- Identify what the prompt is missing:
Element Check
Task Is the core action explicit and unambiguous?
Constraints Are length, format, tone, and scope defined?
Output format Does it specify the expected structure?
Context Does the model have enough background to act? Check: audience, input format, success criteria, scope boundaries, technical constraints
Examples Would a demonstration clarify the expected output?
Edge cases Are failure modes and boundary conditions addressed?
Reader Will a model parse this with no human available to disambiguate? If yes, apply Machine-Parsed Text below.
  1. Rewrite -- Transform into specification language: precise, imperative, no filler. Treat the prompt as a spec, not conversation.

  2. Validate -- Check the rewrite against the assessment table. Every gap identified in step 1 must be addressed.

Rules

  • Length: 0.75x–1.5x the original. Conciseness is a feature -- add only what's missing, cut what's vague.
  • A line must change behavior. "Cut what's vague" and "cut what the model already does" are different filters, and the second removes far more -- every line reads as non-vague once it is imperative. If the model would act that way by default, delete the whole sentence rather than trimming words from it. The recurring offender is encouragement it already follows: "be careful", "be thorough", "think it through", "make sure to".
  • Name the concept, don't explain it. Use terms the model knows (idempotent, invariant, race condition, TOCTOU, YAGNI) instead of spelling them out. Spell out only terms the project invented, once, in one place.
  • State a rule once. If the same rule appears in two sections, cut one and point to the other.
  • Pair every prohibition with the positive target. Steering by ban drags the forbidden behavior into context and makes it more available, not less -- the negation is a weak modifier riding on a strongly activated concept. Prompt the target instead ("write one-line comments" rather than "don't write long comments") so the banned behavior is never named. A bare prohibition earns its place only as a hard guardrail whose whole content is the refusal, with no behavior to substitute. Everywhere else the check is mechanical: every never and don't line states its replacement behavior.
  • Never invent -- only use information present in the original prompt or conversation context. If critical info is missing, ask instead of assuming.
  • Instruction hierarchy -- order sections by priority: task → constraints → examples → input data → output format. Place the most important instruction first.
  • Progressive complexity -- start with the simplest prompt that could work. Add few-shot examples, chain-of-thought, or role framing only when the task demands it, not by default.
  • Specific verbs -- replace vague actions ("analyze", "process", "handle") with measurable ones ("list the top 3", "classify as A/B/C", "return JSON with keys X, Y").
  • One output format -- specify exactly one format (JSON schema, markdown template, numbered list). Ambiguous format expectations cause inconsistent results.
  • Give the reason, not just the rule. A dense block of MUST/CRITICAL anchors the model on the instruction at the expense of the context it applies to, and bare imperatives compete rather than compound. Keep them few and motivated: state what the rule prevents in the same sentence, so the model generalizes to the case the rule did not name.
  • No meta-commentary -- output only the refined prompt as markdown. No preamble ("Here's an improved version..."), no explanation of changes unless explicitly requested.

Read the full file on GitHub · 87 lines

Files

What ships with it

1 file 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.

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. 5d ago First seen · 87 lines · 45 tokens per session scan A a875f8bea28d

Subscribe to this mod's changes

ia-refine-prompt is a skill published in the GitHub repository iliaal/whetstone (33 stars, last pushed 4d ago), licensed MIT. It adds 45 tokens to every session and 1,522 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to refine-prompt, differing in 2 lines, and is treated as a copy.

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