plan

plan is a skill for Claude Code, Codex from greglas75/zuvo. It costs 53 tokens per session (11,175 once invoked), scanned A, original, MIT.

A planning tool that turns an approved specification or a written request into ordered implementation tasks with tests and verification steps. TDD means writing a failing test before the code that makes it pass.

In plain words
What is it for?
Use it to analyze a project, choose implementation patterns, assess testability, and create TDD-based tasks with exact checks.
Why use it?
It gives developers a concrete sequence of work and connects each task to a requirement, reducing missed details.

Skill for Claude CodeCodex

Part of the zuvo plugin — 56 skills, 48 agents, 5 hooks 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/greglas75/zuvo/plan
Any agent
npx skills add greglas75/zuvo --skill plan
Clone the repo
git clone --depth 1 https://github.com/greglas75/zuvo

Made for: Claude Code, Codex.

Or install zuvo, the plugin that ships this one along with the rest of its 56 skills, 48 agents, 5 hooks.

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/greglas75/zuvo/plan.svg)](https://agentmods.dev/skills/greglas75/zuvo/plan)
Your own site
<a href="https://agentmods.dev/skills/greglas75/zuvo/plan"><img src="https://agentmods.dev/badge/skills/greglas75/zuvo/plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 11,175 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 $0.00053 $0.11175
Opus 5 $0.00026 $0.05587
Sonnet 5 $0.00011 $0.02235
Haiku 4.5 $0.00005 $0.01117

Measured yesterday against content hash 172f322ab5b7, 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 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.

skills/plan/SKILL.md · 662 lines

How it starts

The opening of the file, as written. The whole thing — 662 lines — stays where its author put it; the contents beside it link to each section on GitHub.

zuvo:plan

Create a detailed, task-by-task implementation plan. Every task follows the TDD protocol: RED (failing test) -> GREEN (minimal code) -> Verify -> Commit.


Input Resolution

Determine the planning input. Two modes: spec-driven (from brainstorm output) or inline (from user description).

Step 1: Look for a spec

  1. If the user provided an explicit path (e.g., zuvo:plan docs/specs/my-spec.md), use that file
  2. Otherwise, search: Glob("docs/specs/*-spec.md")
  3. If multiple specs exist, present the list and ask the user which one to plan against

Step 2: Determine mode

  • Spec found with status: Approvedspec-driven mode. Read spec in full. This is the source of truth.
  • Spec found without status: Approved → Print: "Spec exists but is not approved. Using it as reference in inline mode." Treat spec as context, not authority. → inline mode.
  • No spec foundinline mode.

Inline mode requirements

The user's message (argument to zuvo:plan) IS the planning input. Extract:

  • Goal: what they want built
  • Scope: which files/areas are affected (explore codebase if not stated)
  • Constraints: any stated requirements

If the user's description is too vague to plan against (less than one sentence, no clear deliverable), ask ONE clarifying question. Do not block — a couple of sentences is enough to plan from.

Set planning_mode: "inline" or planning_mode: "spec-driven" — this affects the plan document header and review phase.


Artifact Detection

Check if a plan already exists:

  1. Glob("docs/specs/*-plan.md") — look for existing plans
  2. Spec-driven mode: match by spec_id field. If a matching plan exists, ask the user whether to revise or start fresh.
  3. Inline mode: skip this check (no spec_id to match against)
  4. If no plan exists, proceed to Phase 1

Mandatory File Loading

Phase 0 — Bootstrap (load before any work)

CORE FILES LOADED:
  1. ../../shared/includes/codesift-setup.md            -- READ/MISSING
  2. ../../shared/includes/env-compat.md                 -- READ/MISSING
  3. ../../shared/includes/quality-gates.md              -- READ/MISSING
  4. ../../shared/includes/tdd-protocol.md               -- READ/MISSING
  5. ../../shared/includes/session-state.md              -- READ/MISSING
  6. ../../shared/includes/acceptance-proof-protocol.md  -- READ/MISSING
  7. ../../shared/includes/provided-artifact-supremacy.md -- READ/MISSING
  8. ../../rules/file-limits.md                          -- READ/MISSING
  9. ../../shared/includes/run-logger.md                 -- DEFERRED (completion)
 10. ../../shared/includes/retrospective.md              -- DEFERRED (completion)

Read the full file on GitHub · 662 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 662 lines · 53 tokens per session scan A 172f322ab5b7

Subscribe to this mod's changes

plan is a skill published in the GitHub repository greglas75/zuvo (6 stars, last pushed yesterday), licensed MIT. It adds 53 tokens to every session and 11,175 once invoked, about $0.0003 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 2026-09-03.

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