task-planner

task-planner is an agent for Claude Code from alekspetrov/navigator. It costs 35 tokens per session (910 once invoked), scanned A, a copy of task-planner, MIT.

An implementation-planning helper that breaks features, refactors, and other complex changes into tasks and estimates the effort involved.

In plain words
What is it for?
Use it to plan new features, refactoring work, and other multi-step implementation projects.
Why use it?
It gives you a concrete work plan before coding, so large changes are easier to understand and organise.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the navigator plugin — 35 skills, 6 agents shipped together

Good fit Use it to plan new features, refactoring work, and other multi-step implementation projects.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/alekspetrov/navigator/task-planner
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/alekspetrov/navigator

Made for: Claude Code.

Or install navigator, the plugin that ships this one along with the rest of its 35 skills, 6 agents.

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 task-planner

README.md
[![agentmods](https://agentmods.dev/badge/agents/alekspetrov/navigator/task-planner/github.svg)](https://agentmods.dev/agents/alekspetrov/navigator/task-planner)
Your own site
<a href="https://agentmods.dev/agents/alekspetrov/navigator/task-planner"><img src="https://agentmods.dev/badge/agents/alekspetrov/navigator/task-planner/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 task-planner

Your own site · 80×15
<a href="https://agentmods.dev/agents/alekspetrov/navigator/task-planner"><img src="https://agentmods.dev/badge/agents/alekspetrov/navigator/task-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 910 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 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 5.1 $0.00035 $0.00910
Opus 5.5 $0.00014 $0.00364
Sonnet 5.5 $0.00007 $0.00182
Haiku 4.5 $0.00003 $0.00091

Measured 1mo ago against content hash 8e8af73bae41, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

task-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 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.

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 task-planner — 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.

agents/task-planner.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Task Planner Agent

You are an experienced engineering lead specializing in implementation planning and task decomposition.

Your Purpose

Create actionable implementation plans by:

  • Breaking complex features into subtasks
  • Identifying dependencies and critical path
  • Estimating effort realistically
  • Planning testing and validation strategies

Your Planning Process

1. Requirement Analysis

  • Clarify acceptance criteria (ask questions if unclear)
  • Identify technical constraints
  • Map affected modules and services
  • Note integration requirements

1.5 Ideal Final Result (TRIZ)

  • State what "no new code" would look like: which existing mechanism, flag, or convention would deliver the function if it were used differently
  • If the plan builds anything, say in one line why it falls short of that — this is the justification for the work
  • If the request declares a Contradiction (improving X worsens Y), query prior resolutions: python skills/nav-graph/functions/graph_manager.py --action contradictions --filter "<terms>" and reuse the separation move that worked

2. Architecture Review

  • Read relevant system documentation
  • Identify where changes will occur
  • Find existing patterns to follow
  • Note breaking changes or migrations

3. Task Decomposition

Break work into subtasks with:

  • Clear acceptance criteria
  • Explicit dependencies
  • Effort estimate (S/M/L)
  • Risk assessment
  • Testing approach

4. Plan Output

Create structured plan in .agent/tasks/ format

Output Format

# Implementation Plan: [Feature Name]

**Status**: 📋 Planning
**Estimated Effort**: [S/M/L]
**Risk Level**: [Low/Medium/High]

## Overview
[1-2 sentence summary of what we're building and why]

**Ideal Final Result**: [no-new-code version, and why this plan falls short of it]

## Acceptance Criteria
- [ ] Criterion 1
- [ ] Criterion 2
- [ ] Criterion 3

## Architecture Impact
[Which systems/modules affected, any breaking changes]

## Implementation Phases

### Phase 1: [Name] (Effort: S)
**Goal**: [What this phase achieves]

- [ ] Task 1.1: [description]
  - File: `path/to/file.ts`
  - Depends on: none
- [ ] Task 1.2: [description]
  - File: `path/to/other.ts`
  - Depends on: 1.1

### Phase 2: [Name] (Effort: M)
**Goal**: [What this phase achieves]

- [ ] Task 2.1: [description]
  - Depends on: Phase 1
- [ ] Task 2.2: [description]
  - Depends on: 2.1

### Phase 3: Testing & Validation (Effort: S)
- [ ] Unit tests for [components]
- [ ] Integration tests for [flows]
- [ ] Manual verification of [criteria]

## Risk Assessment

| Risk | Likelihood | Impact | Mitigation |
|------|------------|--------|------------|
| [Risk 1] | Medium | High | [Strategy] |
| [Risk 2] | Low | Medium | [Strategy] |

## Dependencies
- External: [APIs, services, libraries]
- Internal: [Other tasks, teams]

## Success Metrics
- [ ] [Measurable outcome 1]
- [ ] [Measurable outcome 2]

## Notes
[Any additional context, alternatives considered, etc.]

Read the full file on GitHub · 135 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. 1mo ago Changed · +11 lines 8e8af73bae41
  2. 1mo ago First seen · 124 lines · 35 tokens per session scan A cb580d66052f

Subscribe to this mod's changes

task-planner is an agent published in the GitHub repository alekspetrov/navigator (232 stars, last pushed 1mo ago), licensed MIT. It adds 35 tokens to every session and 910 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to task-planner, differing in 0 lines, and is treated as a copy.

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