verification-before-completion

verification-before-completion is a skill for Claude Code, Codex from Threat-Vector-Security/guardian-agent. It costs 27 tokens per session (543 once invoked), scanned A, original, Apache-2.0.

A checklist for verifying results before saying that work is complete, fixed, or passing. It requires evidence from the relevant tests or other checks, including their full outcome.

In plain words
What is it for?
Confirming that tests pass, a build succeeds, a bug is fixed, or requirements are met before handing work back.
Why use it?
It prevents completion claims based on partial checks or assumptions. It ensures the checks that actually prove the requested result have been run.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/threat-vector-security/guardian-agent/verification-before-completion
Any agent
npx skills add Threat-Vector-Security/guardian-agent --skill verification-before-completion
Clone the repo
git clone --depth 1 https://github.com/Threat-Vector-Security/guardian-agent

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/threat-vector-security/guardian-agent/verification-before-completion.svg)](https://agentmods.dev/skills/threat-vector-security/guardian-agent/verification-before-completion)
Your own site
<a href="https://agentmods.dev/skills/threat-vector-security/guardian-agent/verification-before-completion"><img src="https://agentmods.dev/badge/skills/threat-vector-security/guardian-agent/verification-before-completion.svg" alt="Measured on agentmods" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 543 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 $0.00027 $0.00543
Opus 5 $0.00014 $0.00271
Sonnet 5 $0.00005 $0.00109
Haiku 4.5 $0.00003 $0.00054

Measured 5d ago against content hash 213054b0799d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, 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 5d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/run-code-ui-smoke.sh, scripts/run-skills-routing-harness.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/verification-before-completion/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verification Before Completion

Evidence before claims.

Do not say work is done, fixed, or passing until you have run the command or check that proves it.

Gate

Before making a completion claim:

  1. Identify the command or check that proves the claim.
  2. Run it fresh.
  3. Read the full result, including failures and exit status.
  4. State the actual outcome.

Completion requires the real proof surface to be green, not just a convenient subset.

Use the phrase full legitimate green as the bar:

  • the relevant focused check passes
  • any stronger existing regression, integration, or scenario check that proves the claim also passes
  • no known broader required check is being skipped or silently weakened

In the written response, explicitly use the phrase proof surface when describing the completion bar.

Examples

  • "Tests pass" requires the relevant test command output.
  • "Build succeeds" requires the build command output.
  • "Bug is fixed" requires the original reproduction or regression test to pass.
  • "Requirements are met" requires checking the implemented result against the requested scope, not just passing tests.
  • "Ready to hand off" requires the proof surface that actually matches the promised change, not a narrower substitute.

Red Flags

Stop if you are about to say:

  • should be fixed
  • looks good now
  • probably passes
  • done

without fresh verification evidence in the current turn.

Also stop if:

  • you are skipping a broader existing check without explaining why
  • you are replacing a failing real-world check with a weaker new test
  • you are claiming success from partial green when the legitimate completion bar is still red

Repo-Specific Verification

When working in this GuardianAgent repository, prefer the existing harnesses before inventing ad hoc smoke checks:

  • scripts/run-code-ui-smoke.sh -> runs node scripts/test-code-ui-smoke.mjs
  • scripts/test-coding-assistant.mjs -> coding assistant and code-session workflow harness
  • scripts/run-skills-routing-harness.sh -> runs node scripts/test-skills-routing-harness.mjs

Read the full file on GitHub · 74 lines

Files

What ships with it

4 files 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 · 74 lines · 27 tokens per session scan A 213054b0799d

Subscribe to this mod's changes

verification-before-completion is a skill published in the GitHub repository Threat-Vector-Security/guardian-agent (11 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 27 tokens to every session and 543 once invoked, about $0.0001 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 2026-08-30.

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