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Agent skill

Verification Before Completion

by KbWen in KbWen/agentic-os

Enforce "no evidence = no completion"; run Gate Function verification before declaring done.

MITAuto-check passedAgent Workflows

Install Verification Before Completion

skills CLI
$ npx skills add KbWen/agentic-os --skill verification-before-completion -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install KbWen/agentic-os verification-before-completion --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/KbWen/agentic-os.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/verification-before-completion .claude/skills/verification-before-completion && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
verification-before-completion
GitHub stars
206
Token cost
~396 tokens
SKILL.md length
186 words
Files
2
Skills in repo
12
Repo updated
First seen
Licence
MIT

At a glance

Enforce "no evidence = no completion"; run Gate Function verification before declaring done.

  • Works in 5 steps: Scope Gate: Confirm changes only cover… → Quality Gate: Execute required tests and… → Evidence Gate: Compile reproducible… → …
  • Tasks that involve Verification before completion
  • SKILL.md covers Overview, Ironclad Rules, When to Use and Gate Function, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Verification Before Completion is an agent skill from KbWen/agentic-os. Enforce "no evidence = no completion"; run Gate Function verification before declaring done.

Its SKILL.md is about 400 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Agent Workflows, covering Verification before completion. The repository describes itself as: Governance framework for AI coding agents. It runs them through a five-step workflow (plan, build, review, test, ship) where no step counts as done without evidence. Drop-in… The licence is MIT.

When your agent uses it

  • Tasks that involve Verification before completion

Example prompts

  • “no evidence = no completion”
  • “/verification-before-completion”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Scope Gate: Confirm changes only cover the agreed scope.
  2. Quality Gate: Execute required tests and static checks.
  3. Evidence Gate: Compile reproducible evidence (commands, outputs, versions).
  4. Risk Gate: Confirm rollback strategies and known risks.
  5. Communication Gate: Output a completion summary (changes, validation, constraints).

What it can do on your machine

Read from SKILL.md and the folder at commit 81a4034. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Verification Before Completion loads about 396 tokens when it runs. Until then it costs about 31 tokens; SKILL.md has 186 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~31
When it runs · the whole SKILL.md, loaded when a task matches
~396

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from KbWen/agentic-os at commit 81a4034, republished under its MIT licence (© KbWen). 186 words, ~396 tokens.

Download SKILL.mdSave it as .claude/skills/verification-before-completion/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
verification-before-completion
description
Enforce "no evidence = no completion"; run Gate Function verification before declaring done.

Verification Before Completion

Overview

Any "completed" statement MUST be supported by evidence. This skill provides a pre-completion Gate Function, ensuring results are reproducible, traceable, and deliverable.

Ironclad Rules

  • No evidence = no completion claim.
  • Evidence MUST be reproducible by others; verbal descriptions are NOT accepted.
  • If tests/checks fail, the status MUST revert to in-progress.

When to Use

  • Tasks are preparing to enter /ship.
  • Before submitting PRs or handing off work.
  • After completing high-risk changes (data, permissions, core flows).

Gate Function

  1. Scope Gate: Confirm changes only cover the agreed scope.
  2. Quality Gate: Execute required tests and static checks.
  3. Evidence Gate: Compile reproducible evidence (commands, outputs, versions).
  4. Risk Gate: Confirm rollback strategies and known risks.
  5. Communication Gate: Output a completion summary (changes, validation, constraints).

Minimum Evidence Checklist

  • At least one set of tests/checks directly related to this change.
  • Specific execution commands and results (Success/Failure/Warning).
  • If there are unfinished items, explicitly mark them with follow-up suggestions.

Common Mistakes

  • Claiming "it should work" without any output evidence.
  • Testing only the happy path, missing regressions or edge cases.
  • Treating old test results as evidence for new changes.

© KbWen, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in .agents/skills/verification-before-completion of KbWen/agentic-os.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit 81a4034

Compare with similar skills

Verification Before Completion next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Verification Before Completion compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Verification Before Completion this skillKbWen/agentic-os206—~396Automated safety check: PassMIT
Show Me Your Work Decision Logcursor/plugins10k9 repos~1.6kAutomated safety check: PassNone
PUA Looptanweai/pua20k1 repos~1.1kAutomated safety check: PassMIT
Scope Creep Guardlennney/stop-that-shit2.5k1 repos~2kAutomated safety check: PassMIT
Verification Before Completionfarm-fe/farm5.6k46 repos~1kAutomated safety check: PassMIT
Incremental Implementationaddyosmani/agent-skills103k1 repos~2.3kAutomated safety check: PassMIT

Similar skills

  • Show Me Your Work Decision Log

    cursor/plugins

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    Keeps a TSV decision log for long or unattended agent runs, one row per decision with what, why, evidence and result, so a reviewer can check the work later.

    10k GitHub starsUsed in 9 repos~1.6k tokens
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  • PUA Loop

    tanweai/pua

    Runs an unattended iterate-until-verified loop in which a user-set verify command, not the agent's own claim, decides when the task is finished.

    20k GitHub starsUsed in 1 repo~1.1k tokens
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  • Scope Creep Guard

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    Keeps an agent focused on the requested work by applying a five-step ladder that checks for direct solutions, real gaps and speculative defenses before adding anything.

    2.5k GitHub starsUsed in 1 repo~2k tokens
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  • Verification Before Completion

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    A skill your agent uses when about to claim work is complete, fixed, or passing, before committing or creating PRs - requires running verification commands and confirming output before making any…

    5.6k GitHub starsUsed in 46 repos~1k tokens
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  • Incremental Implementation

    addyosmani/agent-skills

    Delivers a change in thin vertical slices, each implemented, tested, verified and committed before the next, using vertical, contract-first or risk-first slicing.

    103k GitHub starsUsed in 1 repo~2.3k tokens
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  • PUA High-Agency Governance

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    Pushes an agent to keep verifying and changing approach after repeated failures, using a diagnosis line, evidence-based completion and confirmation before risky edits.

    20k GitHub stars~502 tokensUpdated 29 days ago
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  • Karpathy Principles

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  • Production Readiness

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    Use at review and ship, automatically for feature or architecture changes and on request for error handling, logging, crash reporting, or observability; verify errors reach production monitoring.

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  • Doc Lookup

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    Check official docs when framework APIs or configuration may be version-sensitive.

    206 GitHub stars~2.6k tokensUpdated 2 days ago
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  • Systematic Debugging

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Categories

Questions about Verification Before Completion

What does Verification Before Completion do?

Enforce "no evidence = no completion"; run Gate Function verification before declaring done. Verification Before Completion is an agent skill from KbWen/agentic-os. Enforce "no evidence = no completion"; run Gate Function verification before declaring done.

When should I use Verification Before Completion?

Verification Before Completion fits situations like: tasks that involve Verification before completion.

How do I install Verification Before Completion in Claude Code?

Run `npx skills add KbWen/agentic-os --skill verification-before-completion -a claude-code`. Or copy the skill folder (.agents/skills/verification-before-completion in KbWen/agentic-os) into .claude/skills/verification-before-completion in your project. Claude Code loads it when a task matches its description.

How do I install Verification Before Completion in Codex?

Run `npx skills add KbWen/agentic-os --skill verification-before-completion -a codex`. Or copy the skill folder (.agents/skills/verification-before-completion in KbWen/agentic-os) into .agents/skills/verification-before-completion in your project. Codex loads it when a task matches its description.

Can I use Verification Before Completion in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add KbWen/agentic-os --skill verification-before-completion -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/verification-before-completion, .gemini/skills/verification-before-completion, .github/skills/verification-before-completion and .opencode/skills/verification-before-completion in your project.

What does Verification Before Completion need to run?

SKILL.md names no scripts, command-line tools or credentials: Verification Before Completion is instructions for the agent only.

Does Verification Before Completion access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Verification Before Completion safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Verification Before Completion use?

Verification Before Completion is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Verification Before Completion use?

About 396 tokens (SKILL.md is roughly 1.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Verification Before Completion?

Skills that share tags, products or a category with Verification Before Completion: Show Me Your Work Decision Log (cursor/plugins, 10k stars), PUA Loop (tanweai/pua, 20k stars), Scope Creep Guard (lennney/stop-that-shit, 2.5k stars) and Verification Before Completion (farm-fe/farm, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Verification Before Completion?

KbWen (a GitHub user) maintains it in KbWen/agentic-os, which has 206 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 6, 2026.

Source: KbWen/agentic-os on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.