plan

plan is a skill for Claude Code, Codex from Snowflake-Labs/cocoplus. It costs 63 tokens per session (1,653 once invoked), scanned A, original, MIT.

A planning phase that turns an approved specification into an executable work plan, including parallel workstreams and a staged flow. It also checks the specification before planning begins.

In plain words
What is it for?
Use it to review requirements, define implementation stages, assign workstreams, and save the approved plan.
Why use it?
It ensures the team has clear requirements and an approved plan before implementation starts.

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/snowflake-labs/cocoplus/plan
Any agent
npx skills add Snowflake-Labs/cocoplus --skill plan
Clone the repo
git clone --depth 1 https://github.com/Snowflake-Labs/cocoplus

Made for: Claude Code, Codex.

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/snowflake-labs/cocoplus/plan.svg)](https://agentmods.dev/skills/snowflake-labs/cocoplus/plan)
Your own site
<a href="https://agentmods.dev/skills/snowflake-labs/cocoplus/plan"><img src="https://agentmods.dev/badge/skills/snowflake-labs/cocoplus/plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,653 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 $0.00063 $0.01653
Opus 5 $0.00032 $0.00826
Sonnet 5 $0.00013 $0.00331
Haiku 4.5 $0.00006 $0.00165

Measured yesterday against content hash b260edbb0963, 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.

.cortex/skills/cocobrew/plan.skill.md · 166 lines

How it starts

The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are executing the Plan phase (2/6) of CocoBrew. Your objective is to transform the approved specification into an executable plan.

Before proceeding, verify that .cocoplus/ exists in the current directory. If it does not, output: "CocoPlus not initialized in this directory. Run $pod init to begin." Then stop.

Read .cocoplus/lifecycle/meta.json. Verify phases_completed contains "spec". If not: output "The Spec phase must be completed before planning. Run $spec to capture requirements first." Then stop.

CocoSpec Pre-Flight Quality Gate

Before entering plan mode, run the CocoSpec scoring gate. Spawn a background Haiku subagent (read-only) to score spec.md and discuss.md (if it exists) against five dimensions:

Dimension Score 0 Score 1 Score 2
Value No rationale Rationale present but benefits not measurable Clear rationale with verifiable success metrics
Scope No scope definition MVP defined but out-of-scope not stated Both MVP and explicit out-of-scope defined
Acceptance No acceptance criteria Criteria stated but not testable Testable criteria with clear pass/fail determination
Boundaries None addressed Partial coverage All four (error handling, performance, compatibility, security) addressed
Risk No risk assessment Risks identified but no mitigation Risks identified with explicit mitigation or escalation plan

The scoring agent writes the score and per-dimension rationale to lifecycle/spec-score.md.

Gate behavior:

  • Score ≥9: Gate passes. Check Quick Mode eligibility (see below).
  • Score 8: Hold. Show which dimension scored below 2. Ask developer to address the gap before proceeding.
  • Score ≤7: Hold. Output an Uncertainty Declaration for every sub-2 dimension — name each assumption being made rather than stated. Developer must address before planning proceeds.

Uncertainty Declaration format (for score ≤7):

UNCERTAIN: [dimension description] | ASSUMPTION: [what is being assumed]

Quick Mode check (score ≥9 only): If score ≥9 AND spec scope is ≤3 files (detectable from spec.md's Deliverables section) AND no EHRB indicators in the planned operations: offer Quick Mode — "Your specification qualifies for Quick Mode. Skip Plan phase and proceed directly to Build?" Quick Mode requires explicit developer confirmation. If accepted, record "quick_mode": true in lifecycle/meta.json and add "plan" to phases_completed with a note, then skip to Build.

Read the full file on GitHub · 166 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. yesterday First seen · 166 lines · 63 tokens per session scan A b260edbb0963

Subscribe to this mod's changes

plan is a skill published in the GitHub repository Snowflake-Labs/cocoplus (720 stars, last pushed 2d ago), licensed MIT. It adds 63 tokens to every session and 1,653 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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