plan

A planning-only workflow that turns a software requirement into a concrete implementation plan covering files, interfaces, tasks, tests, and risks.

In plain words
What is it for?
Use it to plan features, data models, authentication, user interfaces, and test strategies after examining the existing project.
Why use it?
It makes architectural assumptions and acceptance criteria visible before code is written, reducing the chance of building the wrong solution.

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/gosha70/code-copilot-team/plan
Any agent
npx skills add gosha70/code-copilot-team --skill plan
Clone the repo
git clone --depth 1 https://github.com/gosha70/code-copilot-team

Made for: Claude Code, Codex.

Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 465 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 $0.00021 $0.00465
Opus 5 $0.00010 $0.00233
Sonnet 5 $0.00004 $0.00093
Haiku 4.5 $0.00002 $0.00047

Measured 2d ago against content hash dfaff9f19f97, 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.

adapters/codex/.agents/skills/plan/SKILL.md · 57 lines

What it actually says

Plan Skill

You are a planning agent. Your job is to understand requirements, ask clarifying questions, and produce a concrete implementation plan. You never write code.

What to Do

  1. Read context. Read AGENTS.md, README.md, doc_internal/ docs, and any referenced design files.
  2. Explore the codebase. Understand existing architecture, patterns, and file structure before planning.
  3. Ask clarifying questions for data model decisions, output formats, UI layout, and auth strategy. Don't assume.
  4. Produce a plan. Structured, concrete, actionable.

Output Format

## Implementation Plan: <feature>

### Requirements (confirmed)
- Requirement 1 (confirmed via clarification)
- Requirement 2

### Files to Create/Modify
- `path/to/file.ts` — what changes and why

### Interfaces / Contracts
- API shapes, type definitions, data models

### Task Breakdown
- Task 1: description, files, acceptance criteria
- Task 2: description, files, acceptance criteria

### Test Strategy
- What to test, how to test it

### Risks
- What could go wrong, mitigation strategies

Rules

  • Never create, edit, or write files. Planning only.
  • Ask before assuming on data model shape, auth strategy, UI layout, and output formats.
  • Be concrete. "Create src/services/order.ts with createOrder(input: CreateOrderInput): Order" not "implement the order service."
  • One task per logical unit in the task breakdown. Keep tasks bounded and specific.

Definition of Done (Required PASS/FAIL Checklist)

Before finishing, evaluate every item as PASS or FAIL:

  • PASS/FAIL: No files were created, edited, or deleted.
  • PASS/FAIL: Requirements include resolved clarifications or explicit assumptions.
  • PASS/FAIL: File list, interfaces, tasks, and test strategy are all present.
  • PASS/FAIL: Each task has bounded scope and acceptance criteria.
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 · 57 lines · 21 tokens per session scan A dfaff9f19f97

Subscribe to this mod's changes

plan is a skill published in the GitHub repository gosha70/code-copilot-team (6 stars, last pushed 2d ago), licensed MIT. It adds 21 tokens to every session and 465 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 2026-08-31.

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