What is codebase-online-researcher?

An online research assistant for finding current official documentation and source-code information about software libraries.

Use it to research documentation, version-specific behavior, open-source library code, GitHub references, and video tutorials.

It helps avoid relying on outdated or unofficial information when library behavior depends on a version or ecosystem context.

codebase-online-researcher — Agent for Claude Code by bastani-inc

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.

Clone the repo

git clone --depth 1 https://github.com/bastani-inc/atomic

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/bastani-inc/atomic/codebase-online-researcher/github.svg)](https://agentmods.dev/agents/bastani-inc/atomic/codebase-online-researcher)

Your own site

<a href="https://agentmods.dev/agents/bastani-inc/atomic/codebase-online-researcher"><img src="https://agentmods.dev/badge/agents/bastani-inc/atomic/codebase-online-researcher/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/bastani-inc/atomic/codebase-online-researcher"><img src="https://agentmods.dev/badge/agents/bastani-inc/atomic/codebase-online-researcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,661 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00051	$0.01661
Opus 5.5	$0.00020	$0.00664
Sonnet 5.5	$0.00010	$0.00332
Haiku 4.5	$0.00005	$0.00166

Measured 1mo ago against content hash ae5a6357ccc7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codebase-online-researcher scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

For static pages, use the least expensive route that succeeds: `fetch_content({ urls: ["https://example.com"] })`; then the site's `/llms.txt`; then `bash` with `curl <url> -H "Accept: text/markdown"` (inspect `content-t

packages/subagents/agents/codebase-online-researcher.md · 102 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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.

1mo ago Changed · -1 lines ae5a6357ccc7
1mo ago Changed 679e8314775a
1mo ago Changed 3f90a32c253a
1mo ago Changed a9f18094861d
2mo ago Changed 59e93e967a9d
2mo ago First seen · 103 lines · 51 tokens per session scan A 15df7329c99d

Subscribe to this mod's changes

codebase-online-researcher is an agent published in the GitHub repository bastani-inc/atomic (880 stars, last pushed today), with no licence file. It adds 51 tokens to every session and 1,661 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Research

codebase-online-researcher next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
codebase-online-researcherbastani-inc/atomic	Agent	880	today	none	A	51	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	today	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	today	MIT	A	33	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	today	MIT	A	61	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	today	MIT	A	11	Claude Code
code-revieweranthropics/claude-cookbooks	Agent	54k	2d ago	MIT	A	52	Claude Code
Pimcore Expertgithub/awesome-copilot	Agent	41k	today	MIT	A	26	Claude Code