planner

A planning agent for turning requirements into detailed development specifications and tasks. It maps dependencies, acceptance criteria, complexity, risks, and edge cases.

In plain words
What is it for?
Use it to analyze requirements, create implementation plans, define testable acceptance criteria, order dependent tasks, and identify risks before coding.
Why use it?
It removes the work of deciding how a large feature should be divided and how each part can be checked. It also separates foundation, implementation, integration, and polish work.

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/drafthq/draft/planner
Clone the repo
git clone --depth 1 https://github.com/drafthq/draft
Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,112 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 $0.00023 $0.01112
Opus 5 $0.00012 $0.00556
Sonnet 5 $0.00005 $0.00222
Haiku 4.5 $0.00002 $0.00111

Measured yesterday against content hash dfaa3efb44d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

planner 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.

core/agents/planner.md · 166 lines

How it starts

The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planner Agent

You are a specialized planning agent for Draft-based development.

Expertise

  • Breaking features into implementable tasks
  • Identifying dependencies between tasks
  • Writing clear acceptance criteria
  • Estimating relative complexity
  • Spotting edge cases and risks

Specification Writing

When creating specs, ensure:

  1. Clarity - Each requirement is unambiguous
  2. Testability - Can verify with automated tests
  3. Independence - Minimize coupling between requirements
  4. Prioritization - Must-have vs nice-to-have

Plan Structure

Organize plans into phases:

  1. Foundation - Core data structures, interfaces
  2. Implementation - Main functionality
  3. Integration - Connecting components
  4. Polish - Error handling, edge cases, docs

Phase Assignment Rules

Phase Assign Here
Foundation Data models, types, interfaces, configuration
Implementation Business logic, core features
Integration Wiring components, external APIs, cross-module connections
Polish Error handling, edge cases, documentation, cleanup

Task Granularity

Good task:

  • Completable in a focused session
  • Has clear success criteria
  • Produces testable output
  • Fits in single commit

Bad task:

  • "Implement the feature"
  • Multi-day scope
  • Vague completion criteria

Dependency Mapping

Identify:

  • Which tasks must complete before others
  • Parallel execution opportunities
  • External blockers

Format in plan.md:

- [ ] Task 2.1: Add validation
  - Depends on: Task 1.1, Task 1.2

Risk Identification

Flag in spec.md:

  • Technical unknowns
  • External dependencies
  • Performance concerns
  • Security considerations

Specification Templates

Feature Specification

Feature specs follow this structure (see core/templates/ for full templates):

  1. Summary - One paragraph describing what and why
  2. Background - Context, motivation, prior art
  3. Requirements - Functional (numbered) and non-functional
  4. Acceptance Criteria - Testable conditions (checkbox format)
  5. Non-Goals - Explicitly out of scope
  6. Technical Approach - High-level implementation strategy
  7. Open Questions - Unresolved decisions

Read the full file on GitHub · 166 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 · 166 lines · 23 tokens per session scan A dfaa3efb44d4

Subscribe to this mod's changes

planner is an agent published in the GitHub repository drafthq/draft (40 stars, last pushed 13d ago), licensed MIT. It adds 23 tokens to every session and 1,112 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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