check-if-done

check-if-done is a skill for Claude Code from szarkans/multi. It costs 88 tokens per session (2,545 once invoked), scanned A, original, MIT.

A completion-checking workflow that compares promised work with what the code actually does and requires a real command to be run before calling it finished.

In plain words
What is it for?
Use it to review a task, specification, issue, or pull request before declaring the work done, using independent checks and command results as evidence.
Why use it?
It helps catch work that only looks complete because the author assumes it works without testing it.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents; names the TodoWrite tool; mentions Codex.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the multi plugin — 6 skills, 5 agents shipped together

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add szarkans/multi
Claude Code
/plugin install multi

Made for: Claude Code.

Or install multi, the plugin that ships this one along with the rest of its 6 skills, 5 agents.

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 check-if-done

README.md
[![agentmods](https://agentmods.dev/badge/skills/szarkans/multi/check-if-done.svg)](https://agentmods.dev/skills/szarkans/multi/check-if-done)
Your own site
<a href="https://agentmods.dev/skills/szarkans/multi/check-if-done"><img src="https://agentmods.dev/badge/skills/szarkans/multi/check-if-done.svg" alt="Measured on agentmods" height="20"></a>
Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,545 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00088 $0.02545
Opus 5 $0.00044 $0.01273
Sonnet 5 $0.00018 $0.00509
Haiku 4.5 $0.00009 $0.00254

Measured today against content hash ed35b7295397, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

check-if-done 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 today.

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.

skills/check-if-done/SKILL.md · 201 lines

How it starts

The opening of the file, as written. The whole thing — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Check if it is actually done

!sh -c 'for p in "$CLAUDE_PLUGIN_ROOT/scripts" "$HOME/.claude/skills/multi/scripts" "./.claude/skills/multi/scripts"; do [ -x "$p/probe.sh" ] && { "$p/probe.sh"; echo "scripts-dir: $p"; exit 0; }; done; echo "probe: NOT FOUND — locate scripts/probe.sh in this plugin and run it yourself"'

A model that just wrote code is the worst possible judge of whether that code works. It compares the task to its own summary of what it did, the two match, and it says done. Nothing was verified — the check was a memory of an intention.

So this skill does two things a normal review does not:

  1. Someone who did not write it looks at it — Codex, OpenCode, and a sub-agent that has never seen this conversation.
  2. Nothing is called done without an executed command behind it. Not "the tests should pass" — the command, its output, its exit code.

$SCRIPTS is whatever the probe printed as scripts-dir:.

First: what was promised?

Everything here is a comparison, so you need both sides. In this order:

  1. What the user named — a plan file, a spec, an issue, a PR description. Read it.
  2. This session — what was asked for and what you said you did. Write it down as an explicit list before you go further; a promise you keep only in your head is one you will grade yourself on generously.
  3. Nothing? Then say so and stop: "nothing to check against — point me at a plan or tell me what this was supposed to do." Do not substitute a code review. There is already a skill for that, and silently becoming it is how a completion check turns into theatre.

Then resolve the other side: what actually changed. git diff, the branch, the files you touched. Say both out loud in one line before launching anything:

Promised: <where it came from — plan.md, the issue, what we did this session>
Changed:  <concrete paths or range>

Launch the outside reviewers

They are free and slow to start, so they go first and run in the background while you do the real work below.

Read the full file on GitHub · 201 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. today Changed · -3 lines ed35b7295397
  2. 2d ago Changed · +7 lines dba74449e747
  3. 6d ago First seen · 197 lines · 88 tokens per session scan A a53dcfae9d03

Subscribe to this mod's changes

check-if-done is a skill published in the GitHub repository szarkans/multi (9 stars, last pushed yesterday), licensed MIT. It adds 88 tokens to every session and 2,545 once invoked, about $0.0004 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.

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