completion-verification

completion-verification is a skill for Claude Code from cbrock84/headcount. It costs 73 tokens per session (425 once invoked), scanned A, original, MIT.

A final check that confirms a coding task really meets the original request by running the project’s actual checks and reading their results.

In plain words
What is it for?
Use it before declaring a fix complete, committing changes, opening a pull request, or reporting that tests pass.
Why use it?
It prevents claiming that work is finished just because it seems likely to work or a partial test passed. It also catches skipped tests, warnings, leftover debugging code, and collateral damage.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the technology plugin — 11 skills shipped together

Good fit Use it before declaring a fix complete, committing changes, opening a pull request, or reporting that tests pass.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cbrock84/headcount/completion-verification
About the project

headcount is an organization of independently installable Claude Code plugins, each grouping skills for a department such as finance, security, or demand generation. Claude Code users install the departments they need and invoke their skills for specialized work; the catalogue entries are skills and related agent tooling from that organization.

cbrock84/headcount · 2,077 stars · on GitHub · cbrock84.github.io

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 cbrock84/headcount --skill completion-verification
Clone the repo
git clone --depth 1 https://github.com/cbrock84/headcount

Made for: Claude Code.

Or install technology, the plugin that ships this one along with the rest of its 11 skills.

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 completion-verification

README.md
[![agentmods](https://agentmods.dev/badge/skills/cbrock84/headcount/completion-verification/github.svg)](https://agentmods.dev/skills/cbrock84/headcount/completion-verification)
Your own site
<a href="https://agentmods.dev/skills/cbrock84/headcount/completion-verification"><img src="https://agentmods.dev/badge/skills/cbrock84/headcount/completion-verification/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 completion-verification

Your own site · 80×15
<a href="https://agentmods.dev/skills/cbrock84/headcount/completion-verification"><img src="https://agentmods.dev/badge/skills/cbrock84/headcount/completion-verification.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 425 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00073 $0.00425
Opus 5.5 $0.00029 $0.00170
Sonnet 5.5 $0.00015 $0.00085
Haiku 4.5 $0.00007 $0.00042

Measured 1mo ago against content hash 3310045bae2d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

completion-verification 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 1mo 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/technology/skills/completion-verification/SKILL.md · 39 lines

What it actually says

Completion verification

The gap between "should work" and "does work" is where most wasted cycles live. This closes it.

Before claiming done

  1. Run the real check, not a subset. The command the project gates on, on the current state of the tree.
  2. Read the output. An exit code of zero with skipped tests, or a build with new warnings, is not what it looks like at a glance.
  3. Re-read the original request. Not your interpretation of it several steps ago — the actual words. Confirm each part was addressed, and name any part that was not.
  4. Check for collateral damage. What else consumes what you changed? Did anything else move?
  5. Confirm nothing was left behind — debug statements, a skipped test, a TODO standing in for the hard case.

What a claim must carry

Say what you ran and what it said. "Tests pass" is an assertion; the command and its output is evidence. If you could not run something, say that explicitly rather than omitting it — an unstated gap reads as a covered one.

Honest incompleteness

Partial work reported accurately is useful. Partial work reported as complete costs someone else the time to discover otherwise, plus the trust. If a part is blocked, unverified, or deliberately skipped, name it in the same breath as the parts that are done.

Never

  • Claim a fix works without having reproduced the failure first.
  • Report success from a stale run.
  • Weaken, skip, or delete a failing test in order to claim green.
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. 1mo ago First seen · 39 lines · 73 tokens per session scan A 3310045bae2d

Subscribe to this mod's changes

completion-verification is a skill published in the GitHub repository cbrock84/headcount (2,077 stars, last pushed 2d ago), licensed MIT. It adds 73 tokens to every session and 425 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-03.

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