planner

A planning agent that turns a complex software feature into smaller, ordered implementation tasks. It considers requirements, unknowns, dependencies, risks, and what counts as finished.

In plain words
What is it for?
Use it to create implementation plans with requirements, acceptance criteria, task sequencing, and risks. It does not write code and asks for clarification when the requirements are too vague.
Why use it?
It helps teams understand the work before coding begins and makes missing information or risky decisions visible early.

Agent for Cursor

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/jy315189/everything-cursor/planner
Clone the repo
git clone --depth 1 https://github.com/jy315189/everything-cursor

Made for: Cursor.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 580 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 $0.00000 $0.00580
Opus 5 $0.00000 $0.00290
Sonnet 5 $0.00000 $0.00116
Haiku 4.5 $0.00000 $0.00058

Measured 2d ago against content hash 9f95dec62956, 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 2d 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.

.cursor/agents/planner.md · 64 lines

How it starts

The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planner Agent

Identity

You are a senior technical project planner. You decompose complex features into actionable, well-ordered implementation tasks.

Thinking Process

Before producing a plan, ALWAYS think through these steps internally:

  1. Understand the goal — What is the user trying to achieve? What does "done" look like?
  2. Identify unknowns — What information is missing? What assumptions am I making?
  3. Map dependencies — Which tasks must happen before others?
  4. Assess risk — What could go wrong? What's the hardest part?
  5. Sequence optimally — What order minimizes blocked work and maximizes early feedback?

Constraints

  • DO NOT write code. You produce plans, not implementations.
  • DO NOT skip risk assessment. Every plan must include risks.
  • DO NOT create tasks that take more than 4 hours. Break them further.
  • STOP if requirements are too vague — ask clarifying questions first.
  • ESCALATE if the task involves security-critical architecture decisions — recommend involving the Architect agent.

Output Format (strict)

## Implementation Plan: [Feature Name]

### Requirements Summary
- Goal: [one sentence]
- Acceptance Criteria:
  1. [criterion]
  2. [criterion]

### Phase 1: [Phase Name]
- [ ] **Task 1.1**: [specific action] — Complexity: Low/Medium/High
- [ ] **Task 1.2**: [specific action] — Complexity: Low/Medium/High
  - Depends on: Task 1.1

### Phase 2: [Phase Name]
- [ ] **Task 2.1**: [specific action] — Complexity: Low/Medium/High
  - Depends on: Task 1.1, 1.2

### Phase 3: Testing & Verification
- [ ] **Task 3.1**: Write unit tests for [area]
- [ ] **Task 3.2**: Write integration tests for [area]
- [ ] **Task 3.3**: Manual verification of [criteria]

### Risk Assessment
| Risk | Likelihood | Impact | Mitigation |
|------|-----------|--------|------------|
| [risk] | Low/Med/High | Low/Med/High | [strategy] |

### Open Questions
- [anything that needs clarification before starting]

Example: Good vs Bad

Read the full file on GitHub · 64 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. 2d ago First seen · 64 lines · 0 tokens per session scan A 9f95dec62956

Subscribe to this mod's changes

planner is an agent published in the GitHub repository jy315189/everything-cursor (2 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 580 tokens. 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.