readwise-research

A research tool for finding and combining documents and highlights from your Readwise Reader library, a service for saving and reviewing articles and notes.

In plain words
What is it for?
Use it to find material on a topic, create a reading brief or research memo, and compare evidence or disagreements in your saved reading.
Why use it?
It helps answer questions about what you have read without searching through your library by hand or starting with unrelated web results.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/jtsang4/efficient-coding/readwise-research
Any agent
npx skills add jtsang4/efficient-coding --skill readwise-research
Clone the repo
git clone --depth 1 https://github.com/jtsang4/efficient-coding

Made for: Claude Code, Codex.

Per session 160 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,529 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00160 $0.02529
Opus 5 $0.00080 $0.01264
Sonnet 5 $0.00032 $0.00506
Haiku 4.5 $0.00016 $0.00253

Measured yesterday against content hash 826d2aa9afbe, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

readwise-research 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 yesterday.

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/readwise-research/SKILL.md · 253 lines

How it starts

The opening of the file, as written. The whole thing — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.

readwise-research

Turn the user's Readwise library into a research desk. Find the most relevant documents and highlights for a topic, synthesize them into a structured memo, and only then propose any cleanup or organization actions.

Preflight

  1. Use the local readwise CLI for all retrieval and write operations in this skill.
  2. Use --json for any command whose output you will inspect programmatically.
  3. If the CLI is missing, install it with npm install -g @readwise/cli.
  4. If the CLI is present but unauthenticated, ask the user for a Readwise access token from https://readwise.io/access_token, then run readwise login-with-token <token>.

Core Defaults

  • Treat this as a research task first and an organizing task second.
  • Default to read-only analysis. Never mutate Reader unless the user explicitly confirms the proposed actions.
  • If the user is asking about what they have read, saved, highlighted, or been reading lately, assume the source of truth is their Readwise library and start there.
  • Do not start with web search or generic outside knowledge when the task is about the user's own reading history.
  • Use documents as the primary units of analysis and highlights as evidence.
  • If the user gives a theme but not a precise question, turn it into a working research question and say that you did so.
  • If the request is too broad, narrow the scope and explain how you narrowed it.
  • If the user does not specify locations, search across new, later, shortlist, and archive. Include feed only if they explicitly ask for it.
  • Prefer 3-6 deeply inspected documents over a long dump of shallow hits.

Interpret the Request

Before searching, extract or infer:

  • topic: the central theme, question, or project
  • scope: what angle matters most, such as arguments, tactics, disagreements, definitions, or examples
  • locations: optional Reader locations to include
  • time_window: optional recency constraint
  • tags: optional tag filter
  • action_mode: whether the user wants analysis only, suggestions, or confirmed mutations

Read the full file on GitHub · 253 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. yesterday First seen · 253 lines · 160 tokens per session scan A 826d2aa9afbe

Subscribe to this mod's changes

readwise-research is a skill published in the GitHub repository jtsang4/efficient-coding (2 stars, last pushed 7d ago), licensed MIT. It adds 160 tokens to every session and 2,529 once invoked, about $0.0008 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 2026-08-31.