verification-before-completion

verification-before-completion is a skill for Claude Code, Codex from oleg494/coding-kit. It costs 57 tokens per session (1,277 once invoked), scanned A, a copy of verification-before-completion, MIT.

A verification checklist for proving that work is complete, fixed, or passing before making that claim. It requires running the relevant full command and checking its result.

In plain words
What is it for?
Use it before reporting that tests pass, a build succeeds, a bug is fixed, or a regression test works. It applies to completion claims, commits, and pull requests.
Why use it?
It prevents assumptions based on earlier runs, partial checks, or code changes that have not been tested. The rule is to provide fresh evidence before claiming success.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it before reporting that tests pass, a build succeeds, a bug is fixed, or a regression test works. It applies to completion claims, commits, and pull requests.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/oleg494/coding-kit/verification-before-completion
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 oleg494/coding-kit --skill verification-before-completion
Clone the repo
git clone --depth 1 https://github.com/oleg494/coding-kit

Made for: Claude Code, Codex.

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 verification-before-completion

README.md
[![agentmods](https://agentmods.dev/badge/skills/oleg494/coding-kit/verification-before-completion/github.svg)](https://agentmods.dev/skills/oleg494/coding-kit/verification-before-completion)
Your own site
<a href="https://agentmods.dev/skills/oleg494/coding-kit/verification-before-completion"><img src="https://agentmods.dev/badge/skills/oleg494/coding-kit/verification-before-completion/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 verification-before-completion

Your own site · 80×15
<a href="https://agentmods.dev/skills/oleg494/coding-kit/verification-before-completion"><img src="https://agentmods.dev/badge/skills/oleg494/coding-kit/verification-before-completion.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,277 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 $0.00057 $0.01277
Opus 5.5 $0.00023 $0.00511
Sonnet 5.5 $0.00011 $0.00255
Haiku 4.5 $0.00006 $0.00128

Measured 2d ago against content hash bdb7ba88e50d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

verification-before-completion 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 2d 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 verification-before-completion — 77 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.

.agents/skills/verification-before-completion/SKILL.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verification Before Completion

Overview

Core principle: Evidence before claims, always.

Violating the letter of this rule is violating the spirit of this rule.

The Iron Law

NO COMPLETION CLAIMS WITHOUT APPLICABLE VERIFICATION EVIDENCE

"Applicable" means evidence valid for the current checked state: revision/snapshot, exact command, scope, environment, run timestamp. Reuse existing evidence until an invalidation condition occurs (code change, failure, or unresolved concern) and report that provenance instead of treating the chat turn as a clock; a fresh invocation is required only when no valid evidence for the checked state exists.

The Gate Function

BEFORE claiming a verified result:

1. IDENTIFY: What command proves this claim?
2. RUN: Execute that command completely when no applicable evidence exists
   for the current checked state — "complete" means no truncated or partial
   run of the check that proves THIS claim, not every check the repo has
3. READ: Full output, check exit code, count failures
4. VERIFY: Does output confirm the claim?
   - If NO: State actual status with evidence
   - If YES: State claim WITH evidence
5. ONLY THEN: Make the claim

Skip any step = lying, not verifying. Reusing evidence that is still valid
for the checked state (same revision, no invalidating change/failure/concern)
is not skipping — but claiming without either is lying.

Scope is part of honesty, in both directions. Claiming a suite-wide green you did not run is a lie; re-running an unchanged check with no new changes, failures, or unresolved concerns is ceremony, not verification. Broaden when scope warrants: shared code touched, or a failure the targeted check exposed.

Common Failures

Claim Requires Not Sufficient
Tests pass Test command output: 0 failures on checked state Unchecked assumption, "should pass"
Linter clean Linter output: 0 errors Extrapolating to the claim's scope; a different check's output for that scope
Build succeeds Build command: exit 0 Linter passing, logs look good
Bug fixed Test original symptom: passes Code changed, assumed fixed
Regression test works Red-green cycle verified Test passes once
Agent completed Inspect changed artifacts and exercise the claimed behavior Agent reports "success"
Requirements met Line-by-line checklist Tests passing

Read the full file on GitHub · 140 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. 2d ago Changed bdb7ba88e50d
  2. 8d ago Changed · +14 tokens per session 2fd2bb583533
  3. 11d ago Changed · +7 lines 0b1686673079
  4. 25d ago Changed cd0522e10844
  5. 26d ago Changed 015a17fe4c87
  6. 1mo ago Changed 41e0df25361b
  7. 1mo ago Changed · -8 lines 2ad90a849d45
  8. 1mo ago Changed 32b352e60348
  9. 1mo ago Changed · +6 lines f644a01b4433
  10. 1mo ago First seen · 135 lines · 43 tokens per session scan A 311af2755fab

Subscribe to this mod's changes

verification-before-completion is a skill published in the GitHub repository oleg494/coding-kit (3 stars, last pushed 2d ago), licensed MIT. It adds 57 tokens to every session and 1,277 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to verification-before-completion, differing in 77 lines, and is treated as a copy.