Agent skill

Verification

Verify before claiming completion. An agent skill from itseffi/agentic-os.

Install Verification

skills CLI

$ npx skills add itseffi/agentic-os --skill verification -a claude-code

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

GitHub CLI

$ gh skill install itseffi/agentic-os verification --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/itseffi/agentic-os.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/verification .claude/skills/verification && 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/

Paste into Claude Code

Install the "verification" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/verification into .claude/skills/verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verification", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/itseffi/agentic-os/tree/main/.agents/skills/verification

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add itseffi/agentic-os --skill verification -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install itseffi/agentic-os verification --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/verification .agents/skills/verification && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "verification" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/verification into .agents/skills/verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verification", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add itseffi/agentic-os --skill verification -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install itseffi/agentic-os verification --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/verification .cursor/skills/verification && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "verification" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/verification into .cursor/skills/verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verification", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/itseffi/agentic-os.git --path .agents/skills/verification

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add itseffi/agentic-os --skill verification -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install itseffi/agentic-os verification --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/verification .gemini/skills/verification && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "verification" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/verification into .gemini/skills/verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verification", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install itseffi/agentic-os verification

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add itseffi/agentic-os --skill verification -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/verification .github/skills/verification && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "verification" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/verification into .github/skills/verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verification", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add itseffi/agentic-os --skill verification -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install itseffi/agentic-os verification --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/verification .opencode/skills/verification && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "verification" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/verification into .opencode/skills/verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verification", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: verification
GitHub stars: 115
Token cost: ~637 tokens
SKILL.md length: 270 words
Files: 2
Skills in repo: 29
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Verify before claiming completion. An agent skill from itseffi/agentic-os.

Works in 5 steps: IDENTIFY - What command proves this claim? → RUN - Execute the FULL command (fresh,… → READ - Full output, check exit code,… → …
Tasks that involve Verification before completion
SKILL.md covers The Iron Law, The Gate Function, What Requires Verification and Red Flags - STOP, plus 5 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Verification is an agent skill from itseffi/agentic-os. Verify before claiming completion. No claims without fresh verification evidence. Use before marking work done.

Its SKILL.md is about 640 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: Agentic personal OS to automate high-leverage workflows with Codex, Claude Code, Pi, OpenClaw and other coding agents/ runtime platforms. The licence is MIT.

When your agent uses it

Tasks that involve Verification before completion

Example prompts

“/verification”

Workflow steps

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

IDENTIFY - What command proves this claim?
RUN - Execute the FULL command (fresh, complete)
READ - Full output, check exit code, count failures
VERIFY - Does output confirm the claim?
ONLY THEN - Make the claim

What it can do on your machine

Read from SKILL.md and the folder at commit e54d0ac. 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 loads about 637 tokens when it runs. Until then it costs about 31 tokens; SKILL.md has 270 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: ~637

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 itseffi/agentic-os at commit e54d0ac, republished under its MIT licence (© itseffi). 270 words, ~637 tokens.

Download SKILL.mdSave it as .claude/skills/verification/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: verification
description: Verify before claiming completion. No claims without fresh verification evidence. Use before marking work done.

Verification Before Completion

Use when about to claim work is complete, fixed, or passing.

The Iron Law

NO COMPLETION CLAIMS WITHOUT FRESH VERIFICATION EVIDENCE

If you haven't run the verification command in this message, you cannot claim it passes.

The Gate Function

Before claiming any status or completion:

IDENTIFY - What command proves this claim?
RUN - Execute the FULL command (fresh, complete)
READ - Full output, check exit code, count failures
VERIFY - Does output confirm the claim?
- If NO: State actual status with evidence
- If YES: State claim WITH evidence
ONLY THEN - Make the claim

Skip any step = lying, not verifying.

What Requires Verification

Claim	Requires	Not Sufficient
Tests pass	Test command output: 0 failures	Previous run, "should pass"
Linter clean	Linter output: 0 errors	Partial check
Build succeeds	Build command: exit 0	Linter passing
Bug fixed	Test original symptom: passes	Code changed
Phase complete	All objectives verified	Tests passing
Task done	Checklist items verified	"I did everything"

Red Flags - STOP

Using "should", "probably", "seems to"
Expressing satisfaction before verification ("Great!", "Done!")
About to commit/push without verification
Relying on partial verification
ANY wording implying success without having run verification

Patterns

Tests:

OK: [Run test] [See: 34/34 pass] "All tests pass"
BAD: "Should pass now"

Build:

OK: [Run build] [See: exit 0] "Build passes"
BAD: "Linter passed" (linter != compiler)

Task completion:

OK: Re-read requirements -> checklist -> verify each -> report
BAD: "Tests pass, task complete"

Common Rationalizations

Excuse	Reality
"Should work now"	Run the verification
"I'm confident"	Confidence != evidence
"Just this once"	No exceptions
"Partial check is enough"	Partial proves nothing

The Bottom Line

Run the command. Read the output. Then claim the result.

No shortcuts. Non-negotiable.

When to Use

Use this skill when the task directly matches the workflow described above.

When Not to Use

Do not use this skill when the request is unrelated, low-stakes, or better handled by a simpler direct response.

Files

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

SKILL.md
agents/openai.yaml

Open the folder on GitHubat commit e54d0ac

Compare with similar skills

Verification 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 compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Verification this skillitseffi/agentic-os	115	—	~637	Automated safety check: Pass	MIT	today
Show Me Your Work Decision Logcursor/plugins	10k	9 repos	~1.6k	Automated safety check: Pass	None	today
PUA Looptanweai/pua	20k	1 repos	~1.1k	Automated safety check: Pass	MIT	28 days ago
Scope Creep Guardlennney/stop-that-shit	2.5k	1 repos	~2k	Automated safety check: Pass	MIT	today
Verification Before Completionfarm-fe/farm	5.6k	46 repos	~1k	Automated safety check: Pass	MIT	16 days ago
Incremental Implementationaddyosmani/agent-skills	103k	1 repos	~2.3k	Automated safety check: Pass	MIT	4 days ago

Similar skills

Show Me Your Work Decision Log
cursor/plugins
Official
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
Agent WorkflowsAuto-check passed
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
Agent WorkflowsAuto-check passed
Scope Creep Guard
lennney/stop-that-shit
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
Agent WorkflowsAuto-check passed
Verification Before Completion
farm-fe/farm
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
Agent WorkflowsAuto-check passed
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
Agent WorkflowsAuto-check passed
PUA High-Agency Governance
tanweai/pua
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 28 days ago
Agent WorkflowsAuto-check passed

Questions about Verification

What does Verification do?

Verify before claiming completion. An agent skill from itseffi/agentic-os. Verification is an agent skill from itseffi/agentic-os. Verify before claiming completion.

When should I use Verification?

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

How do I install Verification in Claude Code?

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

How do I install Verification in Codex?

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

Can I use Verification 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 itseffi/agentic-os --skill verification -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, .gemini/skills/verification, .github/skills/verification and .opencode/skills/verification in your project.

What does Verification need to run?

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

Does Verification 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 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 use?

Verification 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 use?

About 637 tokens (SKILL.md is roughly 2.5k 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?

Skills that share tags, products or a category with Verification: 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?

itseffi (a GitHub user) maintains it in itseffi/agentic-os, which has 115 GitHub stars. The repository holds 29 skills in this directory. The repository was last updated on October 7, 2026.

Source: itseffi/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.

Install Verification

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Verification Before Completion

The Iron Law

The Gate Function

What Requires Verification

Red Flags - STOP

Patterns

Common Rationalizations

The Bottom Line

When to Use

When Not to Use

Files

Compare with similar skills

Similar skills

More from itseffi/agentic-os

Related

Questions about Verification