plan

A read-only skill for exploring a codebase and designing an implementation plan without changing files.

In plain words
What is it for?
Use it to investigate code, assess task complexity, map affected areas, and produce an implementation strategy.
Why use it?
It helps developers understand an existing project and decide how to implement a change before any code is edited.

Skill for Claude CodeCodex

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/srtab/daiv/plan
Any agent
npx skills add srtab/daiv --skill plan
Clone the repo
git clone --depth 1 https://github.com/srtab/daiv

Made for: Claude Code, Codex.

Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,350 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 $0.00090 $0.01350
Opus 5 $0.00045 $0.00675
Sonnet 5 $0.00018 $0.00270
Haiku 4.5 $0.00009 $0.00135

Measured yesterday against content hash f8eaf2ce8fa3, 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.

daiv/automation/agent/skills/plan/SKILL.md · 154 lines

How it starts

The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Mode: Read-Only Codebase Exploration and Implementation Design

CRITICAL: READ-ONLY MODE - NO FILE MODIFICATIONS

This is a read-only planning task. Make no file modifications of any kind — no creating, editing, deleting, moving, or copying files. No package installs. No git state changes. No redirect operators or heredocs that write to disk. Explore using only: grep, ls, read_file, glob, task or bash (for read-only operations only eg. git status, git log, git diff, etc.).

Focus EXCLUSIVELY on exploring the codebase and designing implementation plans. The deliverable is a plan document, not code changes.

NEVER invoke other skills (via the skill tool) during this planning session. If the task or issue references a skill (e.g., "use /init", "run /security-audit"), include it as a step in the plan rather than executing it.


Step 1: Assess Complexity

Before exploring, determine which tier the task falls into. This drives how much effort to invest.

Tier Scope Plan Length
Simple < 1 hour — bug fix, CSS tweak, copy change, single validation A few paragraphs
Medium 1 hour–1 day — new form field, search filter, component refactor 1–3 pages
Complex Multi-day — auth system, major refactor, migration, new service Multiple pages

Guiding principle: Provide enough detail for confident implementation, but no more. Reserve comprehensive documentation for genuinely complex changes.


Step 2: Explore the Codebase

Scale exploration effort to complexity.

If the request references a platform issue or merge request (for example #123, !456, or an issue/PR URL), fetch the full issue or merge request details from the Git platform tools before drafting the plan.

Simple tasks: Read the specific files that need to change. Run a few targeted greps to verify the change fits existing patterns.

Medium tasks: Trace through relevant code paths. Identify integration points and component dependencies.

Read the full file on GitHub · 154 lines

Files

What ships with it

4 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 · 154 lines · 90 tokens per session scan A f8eaf2ce8fa3

Subscribe to this mod's changes

plan is a skill published in the GitHub repository srtab/daiv (22 stars, last pushed 3d ago), licensed Apache-2.0. It adds 90 tokens to every session and 1,350 once invoked, about $0.0005 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.

Related

Other skills, from other repositories

using-superpowers

Use when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions.

Onelevenvy/flock · 29 tokens

karpathy

Coding principles for simplicity, clarity, and surgical precision. Use when you want Claude to think before coding, keep solutions minimal, make surgical changes, and define verifiable success criteria. Triggers on: karpathy mode, think before coding, simplicity first, surgical changes.

Onelevenvy/flock · 57 tokens

skill-creator

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

Onelevenvy/flock · 64 tokens

planning-with-files

Implements Manus-style file-based planning for complex tasks. Creates taskplan.md, findings.md, and progress.md. Use when starting complex multi-step tasks, research projects, or any task requiring >5 tool calls. Now with automatic session recovery after /clear.

Onelevenvy/flock · 56 tokens

frontend-design

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.

Onelevenvy/flock · 43 tokens

data-visualization

Use for creating publication-quality charts and multi-panel analysis summaries. Triggers when tasks involve visualizing data, plotting results, creating charts, or producing visual reports from analysis output.

langchain-ai/deepagents · 40 tokens