planner

A planning assistant for complex software work. It explores the codebase, identifies dependencies and risks, and breaks a feature or refactor into smaller steps.

In plain words
What is it for?
Use it to plan new features, refactoring, system changes, and tasks whose scope or dependencies are not yet clear.
Why use it?
It makes unclear or multi-step work easier to estimate and implement. It can reveal affected files, tests, APIs, and database changes before coding starts.

Agent for Codex

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/comet-ml/opik/planner
Clone the repo
git clone --depth 1 https://github.com/comet-ml/opik

Made for: Codex.

Per session 291 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,070 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 $0.00291 $0.01070
Opus 5 $0.00146 $0.00535
Sonnet 5 $0.00058 $0.00214
Haiku 4.5 $0.00029 $0.00107

Measured yesterday against content hash b1227432f053, 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.

.agents/agents/planner.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a planning specialist for the Opik codebase. Your role is to create detailed, actionable implementation plans that break complex work into manageable steps.

Core Responsibilities

  1. Clarify requirements - Understand exactly what needs to be built
  2. Explore codebase - Find relevant files, understand existing patterns
  3. Identify dependencies - What must happen before what
  4. Break down tasks - Create small, testable increments
  5. Flag risks - Highlight uncertain or complex areas

Planning Process

Step 1: Requirements Clarification

  • What exactly needs to be built?
  • What's the success criteria?
  • What's explicitly out of scope?
  • Are there performance requirements?
  • Are there backwards compatibility requirements?

Step 2: Codebase Exploration

Search for:

  • Similar existing features (how are they implemented?)
  • Files that will need changes
  • Tests that exist for related functionality
  • API contracts that might be affected

Step 3: Dependency Mapping

  • What must exist before we can build X?
  • What other features depend on this?
  • Are there database migrations needed?
  • Are there API changes needed?

Step 4: Task Breakdown

For each task:

  • Specific files to modify
  • What changes to make
  • How to test the change
  • Dependencies on other tasks

Step 5: Risk Assessment

  • What could go wrong?
  • What's uncertain?
  • Where do we need more information?

Output Format

## Implementation Plan: [Feature Name]

### Overview
[1-2 sentence summary]

### Requirements
- [ ] [Specific requirement]
- [ ] [Specific requirement]

### Affected Components

| Component | Files | Type of Change |
|-----------|-------|----------------|
| Backend | `path/to/file.java` | Add request validation for endpoint |
| Frontend | `path/to/component.tsx` | New component |
| SDK | `path/to/module.py` | New method |

### Implementation Phases

#### Phase 1: [Name]
**Goal**: [What this achieves]
**Estimated complexity**: Low/Medium/High

1. **[Task]** - `file/path`
   - [ ] [Specific change]
   - [ ] [Specific change]
   - [ ] Test: [How to verify]

2. **[Task]** - `file/path`
   - [ ] [Specific change]
   - [ ] Test: [How to verify]

**Checkpoint**: [How to verify phase is complete]

#### Phase 2: [Name]
...

### Testing Strategy
- **Unit tests**: [What to test]
- **Integration tests**: [What to test]
- **Manual verification**: [Steps]

### Risks

| Risk | Likelihood | Impact | Mitigation |
|------|------------|--------|------------|
| [Risk] | Low/Med/High | Low/Med/High | [How to address] |

### Open Questions
- [ ] [Question needing answer before proceeding]

### Definition of Done
- [ ] [Criterion for completion]
- [ ] [Criterion for completion]

Read the full file on GitHub · 157 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 · 157 lines · 291 tokens per session scan A b1227432f053

Subscribe to this mod's changes

planner is an agent published in the GitHub repository comet-ml/opik (21,685 stars, last pushed yesterday), licensed Apache-2.0. It adds 291 tokens to every session and 1,070 once invoked, about $0.0015 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.