Perplexity Web Search
davila7/claude-code-templates
Runs web-grounded searches through Perplexity's Sonar models over OpenRouter for current events, recent literature and cited facts beyond the model's training cutoff.
Apply Chain-of-Verification (CoVe) prompting to improve response accuracy through self-verification.
Install Chain Of Verification
$ npx skills add serpro69/claude-toolbox --skill chain-of-verification -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install serpro69/claude-toolbox chain-of-verification --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/serpro69/claude-toolbox.git skills-src && mkdir -p .claude/skills && cp -r skills-src/kodex-plugin/skills/chain-of-verification .claude/skills/chain-of-verification && rm -rf skills-srcUse ~/.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/
Install the "chain-of-verification" agent skill from https://github.com/serpro69/claude-toolbox/tree/master/kodex-plugin/skills/chain-of-verification into .claude/skills/chain-of-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chain-of-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 install https://github.com/serpro69/claude-toolbox/tree/master/kodex-plugin/skills/chain-of-verificationType 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.
$ npx skills add serpro69/claude-toolbox --skill chain-of-verification -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install serpro69/claude-toolbox chain-of-verification --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/serpro69/claude-toolbox.git skills-src && mkdir -p .agents/skills && cp -r skills-src/kodex-plugin/skills/chain-of-verification .agents/skills/chain-of-verification && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "chain-of-verification" agent skill from https://github.com/serpro69/claude-toolbox/tree/master/kodex-plugin/skills/chain-of-verification into .agents/skills/chain-of-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chain-of-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.
$ npx skills add serpro69/claude-toolbox --skill chain-of-verification -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install serpro69/claude-toolbox chain-of-verification --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/serpro69/claude-toolbox.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/kodex-plugin/skills/chain-of-verification .cursor/skills/chain-of-verification && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "chain-of-verification" agent skill from https://github.com/serpro69/claude-toolbox/tree/master/kodex-plugin/skills/chain-of-verification into .cursor/skills/chain-of-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chain-of-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 https://github.com/serpro69/claude-toolbox.git --path kodex-plugin/skills/chain-of-verification--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add serpro69/claude-toolbox --skill chain-of-verification -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install serpro69/claude-toolbox chain-of-verification --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/serpro69/claude-toolbox.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/kodex-plugin/skills/chain-of-verification .gemini/skills/chain-of-verification && rm -rf skills-srcUse ~/.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/
Install the "chain-of-verification" agent skill from https://github.com/serpro69/claude-toolbox/tree/master/kodex-plugin/skills/chain-of-verification into .gemini/skills/chain-of-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chain-of-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.
$ gh skill install serpro69/claude-toolbox chain-of-verificationInstalls 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).
$ npx skills add serpro69/claude-toolbox --skill chain-of-verification -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/serpro69/claude-toolbox.git skills-src && mkdir -p .github/skills && cp -r skills-src/kodex-plugin/skills/chain-of-verification .github/skills/chain-of-verification && rm -rf skills-srcUse ~/.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/
Install the "chain-of-verification" agent skill from https://github.com/serpro69/claude-toolbox/tree/master/kodex-plugin/skills/chain-of-verification into .github/skills/chain-of-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chain-of-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.
$ npx skills add serpro69/claude-toolbox --skill chain-of-verification -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install serpro69/claude-toolbox chain-of-verification --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/serpro69/claude-toolbox.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/kodex-plugin/skills/chain-of-verification .opencode/skills/chain-of-verification && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "chain-of-verification" agent skill from https://github.com/serpro69/claude-toolbox/tree/master/kodex-plugin/skills/chain-of-verification into .opencode/skills/chain-of-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chain-of-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
chain-of-verification- GitHub stars
- 151
- Token cost
- ~1.7k tokens
- SKILL.md length
- 641 words
- Files
- 4
- Skills in repo
- 12
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Apply Chain-of-Verification (CoVe) prompting to improve response accuracy through self-verification.
- Works in 4 steps: Generate initial response. Produce a… → Formulate verification questions. Create… → Independent verification. Answer each… → …
- Complex questions require fact-checking
- SKILL.md covers Conventions, When to Use This Skill, Verification Modes and Workflow, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Chain Of Verification is an agent skill from serpro69/claude-toolbox. Apply Chain-of-Verification (CoVe) prompting to improve response accuracy through self-verification. Use when complex questions require fact-checking, technical accuracy, or multi-step reasoning.
Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `chain-of-verification-isolated.md`, `chain-of-verification-process.md` and `shared-capy-knowledge-protocol.md`).
It sits in Research & Science, covering Fact-checking and source verification. The repository describes itself as: Minimal by design, explicitly multi-lang, production-ready and battle-tested collection of configs and plugins for your Claude Code agentic development workflows: mcp, configs…
When your agent uses it
- Complex questions require fact-checking
- Technical accuracy
- Multi-step reasoning
Example prompts
- “/chain-of-verification”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Generate initial response. Produce a baseline answer to the user's question. This is the subject matter — it exists in context but is not…
- Formulate verification questions. Create 3–5 targeted questions designed to expose errors in the initial response. The questions must be…
- Independent verification. Answer each question independently, without referencing the initial response. Use capy_search if needed. In…
- Reconciliation. Compare verification answers against the initial response. Revise where discrepancies are found.
What it can do on your machine
Read from SKILL.md and the folder at commit 94c5a05. 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
Chain Of Verification loads about 1.7k tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 641 words of instructions outside code blocks.
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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 641 words (~1,671 tokens).
“CoVe is a verification technique that improves response accuracy by making the model fact-check its own answers. Instead of accepting an initial response at face value, CoVe instructs the model to generate verification questions, answer them independently, and revise the…”
- name
- chain-of-verification
Files
SKILL.md and 3 other files in kodex-plugin/skills/chain-of-verification of serpro69/claude-toolbox.
- SKILL.md
- chain-of-verification-isolated.md
- chain-of-verification-process.md
- shared-capy-knowledge-protocol.md
Open the folder on GitHubat commit 94c5a05
Compare with similar skills
Chain Of 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Chain Of Verification this skillserpro69/claude-toolbox | 151 | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| Perplexity Web Searchdavila7/claude-code-templates | 33k | 11 repos | ~3.5k | Automated safety check: Notes | MIT | |
| Citation Verification GuideGalaxy-Dawn/claude-scholar | 5.7k | 2 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Article Fact Checkerdigoal/blog | 8.6k | — | ~939 | Automated safety check: Pass | GPL-2.0 | |
| Deep Research Agent TeamImbad0202/academic-research-skills | 51k | — | ~13k | Automated safety check: Pass | Custom licence | |
| Docs Grounding Verifiermicrosoft/apm | 4k | — | ~1.9k | Automated safety check: Pass | MIT |
Similar skills
Citation Verification Guide
Galaxy-Dawn/claude-scholar
Reference guidance for checking every citation in academic writing against canonical sources such as DOI, arXiv, CrossRef and Semantic Scholar, to catch fake or wrong references.
Article Fact Checker
digoal/blog
三层审查模型,逐段逐句验证文章真伪、证据链与逻辑结构。Use when the user asks to fact-check, verify, audit, or evaluate the credibility of an article, essay, report, opinion piece, social-media post, or any written claim —…
Deep Research Agent Team
Imbad0202/academic-research-skills
Runs a 13-agent pipeline for rigorous academic research, from forming the question through systematic search, synthesis, bias checks and an APA 7.0 report.
- Official
Docs Grounding Verifier
microsoft/apm
A skill your agent uses to verify CLAIM-LEVEL grounding of a documentation page (or set of pages) against the source code.
Fact Checking
bradygaster/squad
Review and validate claims using counter-hypothesis testing.
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Related
Categories
Questions about Chain Of Verification
What does Chain Of Verification do?
Apply Chain-of-Verification (CoVe) prompting to improve response accuracy through self-verification. Chain Of Verification is an agent skill from serpro69/claude-toolbox. Apply Chain-of-Verification (CoVe) prompting to improve response accuracy through self-verification.
When should I use Chain Of Verification?
Chain Of Verification fits situations like: complex questions require fact-checking; technical accuracy; multi-step reasoning.
How do I install Chain Of Verification in Claude Code?
Run `npx skills add serpro69/claude-toolbox --skill chain-of-verification -a claude-code`. Or copy the skill folder (kodex-plugin/skills/chain-of-verification in serpro69/claude-toolbox) into .claude/skills/chain-of-verification in your project. Claude Code loads it when a task matches its description.
How do I install Chain Of Verification in Codex?
Run `npx skills add serpro69/claude-toolbox --skill chain-of-verification -a codex`. Or copy the skill folder (kodex-plugin/skills/chain-of-verification in serpro69/claude-toolbox) into .agents/skills/chain-of-verification in your project. Codex loads it when a task matches its description.
Can I use Chain Of 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 serpro69/claude-toolbox --skill chain-of-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/chain-of-verification, .gemini/skills/chain-of-verification, .github/skills/chain-of-verification and .opencode/skills/chain-of-verification in your project.
What does Chain Of Verification need to run?
SKILL.md names no scripts, command-line tools or credentials: Chain Of Verification is instructions for the agent only.
Does Chain Of 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 Chain Of 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 Chain Of Verification use?
Chain Of Verification has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Chain Of Verification use?
About 1.7k tokens (SKILL.md is roughly 6.7k 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 Chain Of Verification?
Skills that share tags, products or a category with Chain Of Verification: Perplexity Web Search (davila7/claude-code-templates, 33k stars), Citation Verification Guide (Galaxy-Dawn/claude-scholar, 5.7k stars), Article Fact Checker (digoal/blog, 8.6k stars) and Deep Research Agent Team (Imbad0202/academic-research-skills, 51k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Chain Of Verification?
serpro69 (a GitHub user) maintains it in serpro69/claude-toolbox, which has 151 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 9, 2026.
Source: serpro69/claude-toolbox on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.