plan

plan is a skill for Claude Code, Codex from danweinerdev/claude-sdd-planner. It costs 79 tokens per session (2,546 once invoked), scanned A, a copy of sdd-plan, MIT.

A guide for creating or expanding a structured implementation plan with phases, tasks, subtasks, and checks. It can also deepen an existing plan as more information becomes available.

In plain words
What is it for?
Use it to plan a feature, project, or initiative, add missing tasks to an existing plan, refine subtasks, and define verification criteria.
Why use it?
It turns a broad development request into smaller work items with clear completion checks. This makes the work easier to organize and review before coding.

Skill for Claude CodeCodex

Part of the sdd-planner plugin — 34 skills, 8 agents shipped together

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 skills/danweinerdev/claude-sdd-planner/plan
Any agent
npx skills add danweinerdev/claude-sdd-planner --skill plan
Clone the repo
git clone --depth 1 https://github.com/danweinerdev/claude-sdd-planner

Made for: Claude Code, Codex.

Or install sdd-planner, the plugin that ships this one along with the rest of its 34 skills, 8 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 plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/danweinerdev/claude-sdd-planner/plan.svg)](https://agentmods.dev/skills/danweinerdev/claude-sdd-planner/plan)
Your own site
<a href="https://agentmods.dev/skills/danweinerdev/claude-sdd-planner/plan"><img src="https://agentmods.dev/badge/skills/danweinerdev/claude-sdd-planner/plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,546 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 92% 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 $0.00079 $0.02546
Opus 5 $0.00039 $0.01273
Sonnet 5 $0.00016 $0.00509
Haiku 4.5 $0.00008 $0.00255

Measured today against content hash 8dcfde5072ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plan 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 today.

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

92% identical to sdd-plan — 17 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.

commands/plan/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/plan — Decompose Work into an Executable Plan Graph

Path Resolution

The plugin directory contains commands/, agents/, and shared/ as siblings. Find it by globbing for **/commands/research/SKILL.md in both the current directory and ~/.claude/plugins/cache/; if multiple versions match, sort them as semantic versions (like sort -V) and use the highest, then strip commands/research/SKILL.md from the match. Resolve the planning root (artifacts) and target repository per shared/path-resolution.md in the plugin directory.

What This Skill Does

Three tasks are LLM-shaped, and this skill does exactly those three: negotiate intent (the interview), decompose (author the node payload), and read back diagnostics (compile findings, silhouette, critical path). Everything else — validation, coverage checking, view rendering, state — is a CLI call, and the tool refuses what a narrated plan used to let drift. You never write plan or phase markdown by hand under this protocol: phase docs are rendered projections of the committed graph, regenerated by sdd compile, and hand edits to them are overwritten or refused.

Routing: Graph Plans vs v1 Plans

Route by graph presence, not by preference:

  • Plans/<Name>/<Name>-Graph.json exists → this protocol, in extend/revise mode (new nodes arrive as proposal payloads; the graph is the source of truth).
  • The plan exists without a graph → it is a v1 markdown plan and continues under the v1 conventions until converted (D-0022's v1 clause): its statuses, completion evidence, and phase reviews keep their existing rules from shared/frontmatter-schema.md and shared/completion-evidence.md. Make conservative, id-preserving edits only. When the user wants graph execution, offer sdd graph convert --plan <Name> — conversion emits blocking sentinels (untriaged hazards, unspecified gates, NEEDS-CONTRACT contracts) that are real judgments to resolve through the payload path, never defaults to accept.
  • New plan → this protocol from the start.

Read the full file on GitHub · 113 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. today Changed · -50 lines · -5 tokens per session 8dcfde5072ad
  2. 4d ago First seen · 163 lines · 84 tokens per session scan A d9253c090fc8

Subscribe to this mod's changes

plan is a skill published in the GitHub repository danweinerdev/claude-sdd-planner (2 stars, last pushed yesterday), licensed MIT. It adds 79 tokens to every session and 2,546 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to sdd-plan, differing in 17 lines, and is treated as a copy.

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