plan

A planning mode for .NET projects that examines the project’s architecture before proposing implementation steps. It maps the work to affected layers and modules before code is written.

In plain words
What is it for?
Use it to plan features spanning an API, application logic, domain rules, and infrastructure, or to plan refactors and new modules. It is unnecessary for small edits and simple bug fixes.
Why use it?
It reduces the risk of adding code in the wrong place or crossing architectural boundaries. It also gives complex, multi-step work a plan that can be revised when assumptions change.

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/codewithmukesh/dotnet-claude-kit/plan
Any agent
npx skills add codewithmukesh/dotnet-claude-kit --skill plan
Clone the repo
git clone --depth 1 https://github.com/codewithmukesh/dotnet-claude-kit

Made for: Claude Code, Codex.

Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 973 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 $0.00085 $0.00973
Opus 5 $0.00043 $0.00487
Sonnet 5 $0.00017 $0.00195
Haiku 4.5 $0.00009 $0.00097

Measured 2d ago against content hash c323292d9566, 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 2d ago.

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 · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/plan -- Architecture-Aware Planning

What

Enters a structured planning mode that considers the project's architecture pattern before producing an implementation plan. Instead of jumping straight to code, this command forces a deliberate pause to:

  • Identify the project's current architecture (or recommend one)
  • Map the task to affected layers, modules, and boundaries
  • Produce a numbered implementation plan with clear steps
  • Iterate on the plan until it is solid before writing any code

Plans are living documents -- if something goes sideways during implementation, stop and re-plan rather than pushing through a broken approach.

When

  • Non-trivial tasks requiring 3 or more implementation steps
  • Tasks involving architectural decisions (new modules, cross-cutting concerns, new bounded contexts)
  • Features that touch multiple layers (API, application, domain, infrastructure)
  • Refactoring that could affect multiple consumers
  • Any time the user says "plan", "think through", "design this", or "how should I approach"

Skip planning for: Single-file changes, simple bug fixes, typo corrections, config tweaks.

How

Step 1: Understand the Task

Check docs/specs/ for an approved spec covering this task — if one exists, it is the source of truth: map its acceptance criteria to plan steps and skip ahead to Step 2. If the feature is spec-worthy (too big to describe in one sentence) and no spec exists, recommend /spec first instead of planning on assumptions. Otherwise, clarify what the user wants to build with focused questions. Do not assume requirements that were not stated.

Step 2: Detect Architecture

Use the architecture-advisor skill to determine the project's architecture:

  • Check for existing architecture markers (folder structure, project references, patterns)
  • If no architecture is established, run the architecture questionnaire
  • Load the appropriate architecture-specific skill (vertical-slice, clean-architecture, ddd)

Step 3: Map Affected Areas

Read the full file on GitHub · 123 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. 2d ago First seen · 123 lines · 85 tokens per session scan A c323292d9566

Subscribe to this mod's changes

plan is a skill published in the GitHub repository codewithmukesh/dotnet-claude-kit (689 stars, last pushed 26d ago), licensed MIT. It adds 85 tokens to every session and 973 once invoked, about $0.0004 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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