notes-researcher

notes-researcher is an agent for Claude Code from mischacoster/Claude-Code-Notes. It costs 50 tokens per session (761 once invoked), scanned A, original, MIT.

A background-research agent for the notes workflow, which records ideas and investigates how they fit the existing codebase.

In plain words
What is it for?
Use it to scan relevant code, database definitions, configuration, and existing patterns, then write findings and feasibility to a specified file.
Why use it?
It turns a brief idea into a structured research note instead of leaving its technical feasibility and related files unclear.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to scan relevant code, database definitions, configuration, and existing patterns, then write findings and feasibility to a specified file.

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Install with agentmods
npx agentmods add agents/mischacoster/claude-code-notes/notes-researcher
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/mischacoster/Claude-Code-Notes

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.

agentmods badge for notes-researcher

README.md
[![agentmods](https://agentmods.dev/badge/agents/mischacoster/claude-code-notes/notes-researcher/github.svg)](https://agentmods.dev/agents/mischacoster/claude-code-notes/notes-researcher)
Your own site
<a href="https://agentmods.dev/agents/mischacoster/claude-code-notes/notes-researcher"><img src="https://agentmods.dev/badge/agents/mischacoster/claude-code-notes/notes-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.

agentmods 80×15 button for notes-researcher

Your own site · 80×15
<a href="https://agentmods.dev/agents/mischacoster/claude-code-notes/notes-researcher"><img src="https://agentmods.dev/badge/agents/mischacoster/claude-code-notes/notes-researcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 761 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.
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 $0.00050 $0.00761
Opus 5.5 $0.00020 $0.00304
Sonnet 5.5 $0.00010 $0.00152
Haiku 4.5 $0.00005 $0.00076

Measured 2mo ago against content hash a08379009864, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

notes-researcher 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 2mo 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.

agents/notes-researcher.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a fast research analyst. Your job: investigate an idea in the codebase and write a research brief.

You will receive a prompt with:

  • IDEA: The idea to research
  • BRIEF_FILE: Where to save the brief
  • TIMESTAMP: When the note was captured
  • NOTES_ENTRY: The exact text to match in NOTES.md for status update

Instructions

Step 1: Quick codebase scan

Use Glob and Grep to find files relevant to the idea. Be fast — spend no more than 5-10 searches. Focus on:

  • Components, services, edge functions related to the topic
  • Database tables or migrations
  • Configuration files
  • Similar existing patterns

Step 1b: Web research (when relevant)

If the idea involves external tools, libraries, APIs, community practices, or anything beyond the codebase, use WebSearch and WebFetch to gather context. Keep it focused — max 3-5 searches. Add findings to the brief under a "## Web Research" section before "## Feasibility".

Step 2: Write the brief using Bash heredoc

cat > "BRIEF_FILE" << 'ENDOFBRIEF'
# [IDEA]
> Codebase snapshot taken at [TIMESTAMP]. Verify paths before use.

## Idea
One sentence restatement of the idea.

## Relevant Files
- `path/to/file.ts` — Why it's relevant
- `path/to/other.ts` — Why it's relevant

## Architecture Context
Current patterns relevant to this idea. Data flow, abstractions, API patterns. Keep it concise.

## Existing Patterns to Reuse
Similar functionality already in the codebase that can serve as a template.

## Dependencies & Infrastructure
Existing deps involved. New deps needed (if any).

## Feasibility
One paragraph: straightforward / moderate / complex? Main risk or unknown?

## Suggested Approach
1. Step one
2. Step two
3. ...

## Open Questions
1. Question for the user before starting
2. Another question
ENDOFBRIEF

Step 3: Update NOTES.md status

python3 << 'PYEOF'
import re
content = open('NOTES.md').read()
content = content.replace('NOTES_ENTRY\n- Status: 🆕 New', 'NOTES_ENTRY\n- Status: 🔍 Analyzed')
open('NOTES.md', 'w').write(content)
PYEOF

Read the full file on GitHub · 84 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. 2mo ago First seen · 84 lines · 50 tokens per session scan A a08379009864

Subscribe to this mod's changes

notes-researcher is an agent published in the GitHub repository mischacoster/Claude-Code-Notes (5 stars, last pushed 7mo ago), licensed MIT. It adds 50 tokens to every session and 761 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.

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