multi-source-investigation

multi-source-investigation is a skill for Claude Code from poemswe/co-researcher. It costs 23 tokens per session (834 once invoked), scanned A, original, MIT.

A research method for checking complex claims against multiple kinds of sources, including reports, datasets, and academic preprints. It compares conflicting evidence and records what can and cannot be verified.

In plain words
What is it for?
Use it for fact-checking, investigating disputed reports, checking studies and preprints, and mapping evidence from supported to disproven claims.
Why use it?
It helps avoid accepting a claim based on one unreliable, biased, or incomplete source. It also makes disagreements between sources easier to explain.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the co-researcher plugin — 15 skills, 3 commands, 1 hook shipped together

Good fit Use it for fact-checking, investigating disputed reports, checking studies and preprints, and mapping evidence from supported to disproven claims.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/poemswe/co-researcher/multi-source-investigation
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add poemswe/co-researcher --skill multi-source-investigation
Clone the repo
git clone --depth 1 https://github.com/poemswe/co-researcher

Made for: Claude Code.

Or install co-researcher, the plugin that ships this one along with the rest of its 15 skills, 3 commands, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for multi-source-investigation

README.md
[![agentmods](https://agentmods.dev/badge/skills/poemswe/co-researcher/multi-source-investigation/github.svg)](https://agentmods.dev/skills/poemswe/co-researcher/multi-source-investigation)
Your own site
<a href="https://agentmods.dev/skills/poemswe/co-researcher/multi-source-investigation"><img src="https://agentmods.dev/badge/skills/poemswe/co-researcher/multi-source-investigation/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for multi-source-investigation

Your own site · 80×15
<a href="https://agentmods.dev/skills/poemswe/co-researcher/multi-source-investigation"><img src="https://agentmods.dev/badge/skills/poemswe/co-researcher/multi-source-investigation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 834 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00023 $0.00834
Opus 5 $0.00012 $0.00417
Sonnet 5 $0.00005 $0.00167
Haiku 4.5 $0.00002 $0.00083

Measured 12d ago against content hash c031ba3739ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

multi-source-investigation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/multi-source-investigation/SKILL.md · 75 lines

How it starts

The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.

  • 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".

<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>

Read the full file on GitHub · 75 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 75 lines · 23 tokens per session scan A c031ba3739ac

Subscribe to this mod's changes

multi-source-investigation is a skill published in the GitHub repository poemswe/co-researcher (128 stars, last pushed 3d ago), licensed MIT. It adds 23 tokens to every session and 834 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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