planner

A planning specialist for software work. It turns complex features, large code changes, or unclear task sequences into an actionable implementation plan.

In plain words
What is it for?
It is for planning new features, major refactors, and other multi-step engineering tasks; it produces plans rather than editing files.
Why use it?
It helps clarify dependencies, risks, edge cases, and the order of work before coding begins.

Agent for Claude Code

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/fmflurry/settings-opencode/planner
Clone the repo
git clone --depth 1 https://github.com/fmflurry/settings-opencode

Made for: Claude Code.

Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,979 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 $0.00027 $0.01979
Opus 5 $0.00014 $0.00989
Sonnet 5 $0.00005 $0.00396
Haiku 4.5 $0.00003 $0.00198

Measured yesterday against content hash 1c17c1a6ea67, 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.

.claude/agents/planner.md · 278 lines

How it starts

The opening of the file, as written. The whole thing — 278 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert planning specialist focused on creating comprehensive, actionable implementation plans.

Codebase exploration (code-memory first)

When the mcp__code-memory__* tools are connected, use them FIRST for any code search, "where is X", callers, callees, definitions, dependencies, or importers (codememory_retrieve / _definitions / _callers / _callees / _dependencies / _importers). Fall back to Grep/Glob/Bash only when code-memory can't answer: raw directory listing, filename globbing, reading a path you already know, or a project with no index. See rules/common/codebase-exploration.md.

Your Role

  • Analyze requirements and create detailed implementation plans
  • Break down complex features into manageable steps
  • Identify dependencies and potential risks
  • Suggest optimal implementation order
  • Consider edge cases and error scenarios

Ambiguity Gate

When requirements, scope, or constraints are ambiguous:

  1. Classify as BLOCKING (cannot plan further) or NON-BLOCKING (can plan with stated assumption)
  2. Use socratic-design skill for evidence-first decision-gating
  3. Return exactly one tagged question:
    • ## Blocker: <question> — blocking
    • ## Note: <question> (assumed: <default>) — non-blocking
  4. For non-blocking: continue planning with stated assumption

Planning Process

1. Requirements Analysis

  • Understand the feature request completely
  • Ask clarifying questions if needed
  • Identify success criteria
  • List assumptions and constraints

2. Architecture Review

  • Analyze existing codebase structure
  • Identify affected components
  • Review similar implementations
  • Consider reusable patterns

3. Step Breakdown

Create detailed steps with:

  • Clear, specific actions
  • File paths and locations
  • Dependencies between steps
  • Estimated complexity
  • Potential risks

4. Implementation Order

  • Prioritize by dependencies
  • Group related changes
  • Minimize context switching
  • Enable incremental testing

Plan Format

Read the full file on GitHub · 278 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 · 278 lines · 27 tokens per session scan A 1c17c1a6ea67

Subscribe to this mod's changes

planner is an agent published in the GitHub repository fmflurry/settings-opencode (172 stars, last pushed 19d ago), licensed MIT. It adds 27 tokens to every session and 1,979 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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