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.
You must use this when investigating complex claims across diverse sources or fact-checking contradictory information.
Install Multi Source Investigation
$ npx skills add poemswe/co-researcher --skill multi-source-investigation -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install poemswe/co-researcher multi-source-investigation --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/poemswe/co-researcher.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/multi-source-investigation .claude/skills/multi-source-investigation && 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 "multi-source-investigation" agent skill from https://github.com/poemswe/co-researcher/tree/main/skills/multi-source-investigation into .claude/skills/multi-source-investigation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-source-investigation", 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/poemswe/co-researcher/tree/main/skills/multi-source-investigationType 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 poemswe/co-researcher --skill multi-source-investigation -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install poemswe/co-researcher multi-source-investigation --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/poemswe/co-researcher.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/multi-source-investigation .agents/skills/multi-source-investigation && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "multi-source-investigation" agent skill from https://github.com/poemswe/co-researcher/tree/main/skills/multi-source-investigation into .agents/skills/multi-source-investigation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-source-investigation", 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 poemswe/co-researcher --skill multi-source-investigation -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install poemswe/co-researcher multi-source-investigation --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/poemswe/co-researcher.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/multi-source-investigation .cursor/skills/multi-source-investigation && 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 "multi-source-investigation" agent skill from https://github.com/poemswe/co-researcher/tree/main/skills/multi-source-investigation into .cursor/skills/multi-source-investigation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-source-investigation", 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/poemswe/co-researcher.git --path skills/multi-source-investigation--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 poemswe/co-researcher --skill multi-source-investigation -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install poemswe/co-researcher multi-source-investigation --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/poemswe/co-researcher.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/multi-source-investigation .gemini/skills/multi-source-investigation && 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 "multi-source-investigation" agent skill from https://github.com/poemswe/co-researcher/tree/main/skills/multi-source-investigation into .gemini/skills/multi-source-investigation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-source-investigation", 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 poemswe/co-researcher multi-source-investigationInstalls 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 poemswe/co-researcher --skill multi-source-investigation -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/poemswe/co-researcher.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/multi-source-investigation .github/skills/multi-source-investigation && 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 "multi-source-investigation" agent skill from https://github.com/poemswe/co-researcher/tree/main/skills/multi-source-investigation into .github/skills/multi-source-investigation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-source-investigation", 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 poemswe/co-researcher --skill multi-source-investigation -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install poemswe/co-researcher multi-source-investigation --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/poemswe/co-researcher.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/multi-source-investigation .opencode/skills/multi-source-investigation && 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 "multi-source-investigation" agent skill from https://github.com/poemswe/co-researcher/tree/main/skills/multi-source-investigation into .opencode/skills/multi-source-investigation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-source-investigation", 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
multi-source-investigation- GitHub stars
- 130
- Token cost
- ~921 tokens
- SKILL.md length
- 411 words
- Files
- 1
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- MIT
At a glance
You must use this when investigating complex claims across diverse sources or fact-checking contradictory information.
- Works in 3 steps: Adversarial Search → Data Triangulation → Investigative Narrative
- Tasks that involve Fact-checking and source verification
- SKILL.md covers 1. Adversarial Search, 2. Data Triangulation and 3. Investigative Narrative
- Calls uv
What it does
Multi Source Investigation is an agent skill from poemswe/co-researcher. You must use this when investigating complex claims across diverse sources or fact-checking contradictory information.
Its SKILL.md is about 920 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 Research & Science, covering Fact-checking and source verification. The repository describes itself as: A professional research suite for conducting rigorous academic research using specialized agents and multi-platform CLI commands. Compatible with Claude Code, Gemini CLI, OpenAI… The licence is MIT.
When your agent uses it
- Tasks that involve Fact-checking and source verification
Example prompts
- “/multi-source-investigation”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 28c966f. 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
Shell commands in SKILL.md call:
uv
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv, which can reach the network depending on how they are called.
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
Multi Source Investigation loads about 921 tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 411 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
The full file from poemswe/co-researcher at commit 28c966f, republished under its MIT licence (© poemswe). 411 words, ~921 tokens.
Download SKILL.mdSave it as
.claude/skills/multi-source-investigation/SKILL.md (or your agent's skills folder).- name
- multi-source-investigation
- description
- You must use this when investigating complex claims across diverse sources or fact-checking contradictory information.
- tools
- WebSearch, WebFetch, Bash, Read, Grep, Glob
<role>
You are a PhD-level investigative researcher specializing in multi-modal verification and intelligence gathering. Your goal is to triangulate truth from diverse, sometimes conflicting, information sources while maintaining a rigorous audit trail of source credibility.
</role><principles>
- **Triangulation**: Never rely on a single source. Cross-validate critical claims across at least three independent sources.
- **Credibility Policing**: Actively check for biases, funding sources, and institutional reliability for every information source.
- **Traceability**: Provide digital footprints (URLs, citations) for every verified fact.
- **Factual Integrity**: Never fabricate data or verify non-existent sources.
</principles><competencies>1. Adversarial Search
- Verification Queries: Designing "Fact-Check" queries to find counter-perspectives.
- Source Auditing: Identifying "fake news", predatory journals, or echo chambers.
2. Data Triangulation
- Cross-Referencing: Mapping overlapping claims across text, data, and academic preprints.
- Inconsistency Forensics: Identifying exactly where two reports diverge and analyzing the reason (bias vs. data).
3. Investigative Narrative
- Truth Mapping: Visualizing the landscape of evidence from "Verified" to "Debunked".
- Evidence Weighting: Assessing the "Preponderance of Evidence".
</competencies><protocol>
1. **Deconstruct Request**: Break the user's claim or topic into testable sub-claims.
2. **Initial Recon**: Perform a broad search to map the information landscape.
3. **Deep Verification**: Execute targeted searches for each sub-claim across diverse domains (News, Academic, Official, Social).
4. **Source Audit**: Rate the credibility of each major source used.
5. **Synthesis of Truth**: Present the findings with clear confidence levels and markers of consensus vs. discord.
</protocol><source_resolution>
When a sub-claim rests on academic work (a study, paper, or preprint), verify it through the database backends owned by the literature-review skill, not through web search alone: uv run <literature-review-dir>/scripts/openalex_cli.py resolves DOIs/titles and exposes retraction-relevant metadata, europepmc_api.py fetches life-science full text and citation graphs, read_paper.py retrieves full text for any DOI/arXiv/PMCID. A cited study that cannot be resolved in these databases is marked "could not verify" in the Verification Matrix — that is itself a finding. Prerequisite uv: see the literature-review skill's <search_backend> section for setup and invocation details.
</source_resolution>
Show full SKILL.md (90 more words)Show less
<output_format>
Investigation Report: [Subject]
Core Question: [The central claim/topic being investigated]
Verification Matrix:
| Claim | Status | Basis of Verification | Confidence |
|---|---|---|---|
| [C1] | [Verified/Refuted] | [Source A, B, C] | [High/Low] |
Source Credibility Audit:
- [Source A]: [Reliability Rating + Notes on Bias]
- [Source B]: [Reliability Rating + Notes on Bias]
Conclusion: [Final verdict based on preponderance of evidence] </output_format>
<checkpoint>
After the investigation, ask:
- Should I dive deeper into the background of [specific source]?
- Would you like me to find the original primary data mentioned in [source]?
- Should I monitor for updates on this unfolding topic?
</checkpoint>© poemswe, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/multi-source-investigation of poemswe/co-researcher.
Open the folder on GitHubat commit 28c966f
Compare with similar skills
Multi Source Investigation 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 |
|---|---|---|---|---|---|---|
| Multi Source Investigation this skillpoemswe/co-researcher | 130 | — | ~921 | Automated safety check: Pass | MIT | |
| 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 |
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Related
Categories
Questions about Multi Source Investigation
What does Multi Source Investigation do?
You must use this when investigating complex claims across diverse sources or fact-checking contradictory information. Multi Source Investigation is an agent skill from poemswe/co-researcher. You must use this when investigating complex claims across diverse sources or fact-checking contradictory information.
When should I use Multi Source Investigation?
Multi Source Investigation fits situations like: tasks that involve Fact-checking and source verification.
How do I install Multi Source Investigation in Claude Code?
Run `npx skills add poemswe/co-researcher --skill multi-source-investigation -a claude-code`. Or copy the skill folder (skills/multi-source-investigation in poemswe/co-researcher) into .claude/skills/multi-source-investigation in your project. Claude Code loads it when a task matches its description.
How do I install Multi Source Investigation in Codex?
Run `npx skills add poemswe/co-researcher --skill multi-source-investigation -a codex`. Or copy the skill folder (skills/multi-source-investigation in poemswe/co-researcher) into .agents/skills/multi-source-investigation in your project. Codex loads it when a task matches its description.
Can I use Multi Source Investigation 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 poemswe/co-researcher --skill multi-source-investigation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/multi-source-investigation, .gemini/skills/multi-source-investigation, .github/skills/multi-source-investigation and .opencode/skills/multi-source-investigation in your project.
What does Multi Source Investigation need to run?
Going by SKILL.md and its folder, Multi Source Investigation needs the command-line tools its instructions call (uv).
Does Multi Source Investigation access the network?
SKILL.md contains no URLs. Its commands use uv, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Multi Source Investigation 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 Multi Source Investigation use?
Multi Source Investigation 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 Multi Source Investigation use?
About 921 tokens (SKILL.md is roughly 3.7k 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 Multi Source Investigation?
Skills that share tags, products or a category with Multi Source Investigation: 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 Multi Source Investigation?
poemswe (a GitHub user) maintains it in poemswe/co-researcher, which has 130 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on October 10, 2026.
Source: poemswe/co-researcher on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.