Agent skill

Prove Claim

A skill your agent uses when asked to prove, disprove, investigate, or find evidence for a claim about people, concepts, ideas, or their relationships.

No licenceAuto-check passedKnowledge Management

Install Prove Claim

skills CLI

$ npx skills add obra/knowledge-graph --skill prove-claim -a claude-code

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

GitHub CLI

$ gh skill install obra/knowledge-graph prove-claim --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/obra/knowledge-graph.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/prove-claim .claude/skills/prove-claim && 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 "prove-claim" agent skill from https://github.com/obra/knowledge-graph/tree/main/skills/prove-claim into .claude/skills/prove-claim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prove-claim", 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/obra/knowledge-graph/tree/main/skills/prove-claim

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 obra/knowledge-graph --skill prove-claim -a codex

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

GitHub CLI

$ gh skill install obra/knowledge-graph prove-claim --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/obra/knowledge-graph.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/prove-claim .agents/skills/prove-claim && 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 "prove-claim" agent skill from https://github.com/obra/knowledge-graph/tree/main/skills/prove-claim into .agents/skills/prove-claim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prove-claim", 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 obra/knowledge-graph --skill prove-claim -a cursor

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

GitHub CLI

$ gh skill install obra/knowledge-graph prove-claim --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/obra/knowledge-graph.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/prove-claim .cursor/skills/prove-claim && 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 "prove-claim" agent skill from https://github.com/obra/knowledge-graph/tree/main/skills/prove-claim into .cursor/skills/prove-claim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prove-claim", 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/obra/knowledge-graph.git --path skills/prove-claim

--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 obra/knowledge-graph --skill prove-claim -a gemini-cli

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

GitHub CLI

$ gh skill install obra/knowledge-graph prove-claim --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/obra/knowledge-graph.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/prove-claim .gemini/skills/prove-claim && 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 "prove-claim" agent skill from https://github.com/obra/knowledge-graph/tree/main/skills/prove-claim into .gemini/skills/prove-claim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prove-claim", 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 obra/knowledge-graph prove-claim

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 obra/knowledge-graph --skill prove-claim -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/obra/knowledge-graph.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/prove-claim .github/skills/prove-claim && 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 "prove-claim" agent skill from https://github.com/obra/knowledge-graph/tree/main/skills/prove-claim into .github/skills/prove-claim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prove-claim", 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 obra/knowledge-graph --skill prove-claim -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 obra/knowledge-graph prove-claim --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/obra/knowledge-graph.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/prove-claim .opencode/skills/prove-claim && 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 "prove-claim" agent skill from https://github.com/obra/knowledge-graph/tree/main/skills/prove-claim into .opencode/skills/prove-claim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prove-claim", 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: prove-claim
GitHub stars: 111
Token cost: ~1.4k tokens
SKILL.md length: 773 words
Files: 1
Skills in repo: 1
Repo updated: Mar 22, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

A skill your agent uses when asked to prove, disprove, investigate, or find evidence for a claim about people, concepts, ideas, or their relationships.

Works in 5 steps: Decompose the claim → Find the entities → Find connections → …
Find evidence for a claim about people
SKILL.md covers Available Tools, The Prove Workflow, Tips and Provenance and Attribution, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Prove Claim is an agent skill from obra/knowledge-graph. Use when asked to prove, disprove, investigate, or find evidence for a claim about people, concepts, ideas, or their relationships. Also use when asked to explore connections, find who influenced what, trace how ideas developed, or answer questions that require reasoning over multiple linked notes.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Knowledge Management, covering Note-taking. The repository describes itself as: Query and traverse an Obsidian vault as a knowledge graph. Semantic search, path finding, community detection — all local. Claude Code plugin included.

When your agent uses it

Find evidence for a claim about people
Their relationships
Asked to explore connections
Find who influenced what

Example prompts

“/prove-claim”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

Decompose the claim
Find the entities
Find connections
Read the evidence
Assess and report

What it can do on your machine

Read from SKILL.md and the folder at commit 1d2481e. 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

Prove Claim loads about 1.4k tokens when it runs. Until then it costs about 78 tokens; SKILL.md has 773 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~78
When it runs · the whole SKILL.md, loaded when a task matches: ~1.4k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 773 words (~1,437 tokens).

“You have access to a knowledge graph built from an Obsidian vault. The graph contains People, Concepts, Ideas, and conversation summaries connected by wiki links. Your job is to use the graph tools to find evidence that supports or contradicts…”

— opening of SKILL.md by obra

name: prove-claim

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/prove-claim of obra/knowledge-graph.

Open the folder on GitHubat commit 1d2481e

Compare with similar skills

Prove Claim 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.

Prove Claim compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Prove Claim this skillobra/knowledge-graph	111	—	~1.4k	Automated safety check: Pass	None	6 mo ago
Qmdalsk1992/CloddsBot	2.9k	3 repos	~1.2k	Automated safety check: Pass	MIT	7 days ago
Obsidian Canvas BoardsAgriciDaniel/claude-obsidian	15k	—	~1.4k	Automated safety check: Pass	MIT	29 days ago
LLM Wikilewislulu/llm-wiki-skill	655	—	~3.7k	Automated safety check: Pass	None	5 mo ago
Para Memory Filespaperclipai/paperclip	99k	1 repos	~909	Automated safety check: Pass	MIT	today
Add Frontmatterheyitsnoah/claudesidian	2.6k	—	~951	Automated safety check: Pass	MIT	6 mo ago

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Questions about Prove Claim

What does Prove Claim do?

A skill your agent uses when asked to prove, disprove, investigate, or find evidence for a claim about people, concepts, ideas, or their relationships. Prove Claim is an agent skill from obra/knowledge-graph. Use when asked to prove, disprove, investigate, or find evidence for a claim about people, concepts, ideas, or their relationships.

When should I use Prove Claim?

Prove Claim fits situations like: find evidence for a claim about people; their relationships; asked to explore connections; find who influenced what.

How do I install Prove Claim in Claude Code?

Run `npx skills add obra/knowledge-graph --skill prove-claim -a claude-code`. Or copy the skill folder (skills/prove-claim in obra/knowledge-graph) into .claude/skills/prove-claim in your project. Claude Code loads it when a task matches its description.

How do I install Prove Claim in Codex?

Run `npx skills add obra/knowledge-graph --skill prove-claim -a codex`. Or copy the skill folder (skills/prove-claim in obra/knowledge-graph) into .agents/skills/prove-claim in your project. Codex loads it when a task matches its description.

Can I use Prove Claim 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 obra/knowledge-graph --skill prove-claim -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/prove-claim, .gemini/skills/prove-claim, .github/skills/prove-claim and .opencode/skills/prove-claim in your project.

What does Prove Claim need to run?

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

Does Prove Claim 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 Prove Claim 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 Prove Claim use?

No licence was found for Prove Claim or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Prove Claim use?

About 1.4k tokens (SKILL.md is roughly 5.7k 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 Prove Claim?

Skills that share tags, products or a category with Prove Claim: Qmd (alsk1992/CloddsBot, 2.9k stars), Obsidian Canvas Boards (AgriciDaniel/claude-obsidian, 15k stars), LLM Wiki (lewislulu/llm-wiki-skill, 655 stars) and Para Memory Files (paperclipai/paperclip, 99k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Prove Claim?

obra (a GitHub user) maintains it in obra/knowledge-graph, which has 111 GitHub stars. The repository was last updated on March 22, 2026.

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

Install Prove Claim

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

Files

Compare with similar skills

Similar skills

Qmd

Obsidian Canvas Boards

LLM Wiki

Para Memory Files

Add Frontmatter

Obsidian Bases Editor

Related

Questions about Prove Claim