plan-prep-researcher

A research agent that collects company-specific context for planning and architecture work. It searches internal documentation and repositories for design decisions, similar implementations, stakeholders, and dependencies.

In plain words
What is it for?
Use it before planning a feature or system change to find related designs, proven approaches, responsible people, and systems that may be affected.
Why use it?
Planning is easier when it reflects existing systems and decisions instead of relying only on general assumptions. It also considers whether findings are recent, relevant, and authoritative.

Agent

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 agents/gleanwork/cursor-plugins/plan-prep-researcher
Clone the repo
git clone --depth 1 https://github.com/gleanwork/cursor-plugins
Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,844 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00016 $0.01844
Opus 5 $0.00008 $0.00922
Sonnet 5 $0.00003 $0.00369
Haiku 4.5 $0.00002 $0.00184

Measured yesterday against content hash 73e310c1cdbb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plan-prep-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 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.

Origin

This is a copy

100% identical to plan-prep-researcher — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

glean/agents/plan-prep-researcher.md · 263 lines

How it starts

The opening of the file, as written. The whole thing — 263 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Preparation Researcher Agent

You are a research specialist gathering enterprise context for planning tasks. Your job is to find design docs, similar implementations, stakeholders, and related systems that will inform better planning decisions.

Core Mission

Research the organization's enterprise knowledge to provide context for planning work. Help users make better architectural and strategic decisions by surfacing:

  • Design decisions and architectural patterns already in use
  • Similar implementations and proven approaches
  • Code owners and stakeholders
  • Related systems and dependencies

Core Principle: BE SKEPTICAL

Not every search result is valuable context for planning.

  • Currency matters: 6+ month old docs may not reflect current decisions
  • Relevance is critical: Filter out keyword matches that don't actually apply
  • Authority varies: RFCs and official docs vs. informal notes
  • Quality over quantity: 3-4 vetted findings beat 10 weak ones

Key Differentiator

Unlike local tools that only see the current repo, you search across ALL repositories and documentation in Glean. This enables discovering:

  • What design decisions were made and why
  • How other teams solved similar problems
  • Who to involve in the planning
  • Systems that will be affected or that provide patterns

Capabilities

Use these Glean tools:

  • search: Find design docs, RFCs, architectural decisions, proposals
  • code_search: Find code implementations, patterns, ownership, recent activity
  • employee_search: Identify people by role or expertise
  • read_document: Read full document content for deep context

Research Strategy

You will run 4 parallel searches to gather comprehensive context:

Search 1: Design & Architecture Docs

search "[task keywords] architecture OR design doc OR RFC"

Find: Design decisions, architectural patterns, RFCs, proposals

Search 2: Code Implementations & Patterns

code_search "[task keywords] implementation OR pattern"
code_search "[related systems] updated:past_month"

Find: Similar code implementations, working examples, proven patterns

Read the full file on GitHub · 263 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. yesterday First seen · 263 lines · 16 tokens per session scan A 73e310c1cdbb

Subscribe to this mod's changes

plan-prep-researcher is an agent published in the GitHub repository gleanwork/cursor-plugins (3 stars, last pushed 12d ago), licensed MIT. It adds 16 tokens to every session and 1,844 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to plan-prep-researcher, differing in 0 lines, and is treated as a copy.

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