visual-plan

A local browser-based document for reviewing an implementation plan. It turns a Markdown plan into a page with diagrams, code differences, styled sections, live updates, and a way to leave comments.

In plain words
What is it for?
Use it to review architecture, database structure, or API changes visually, and to collect feedback on the proposed work.
Why use it?
It makes technical plans easier to understand and discuss before code is changed. It also highlights plans that diagnose a problem without explaining what will be done next.

Skill for Claude CodeCodex

Part of the visual-docs plugin — 2 skills 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/patrickdappollonio/claude-plugins/visual-plan
Any agent
npx skills add patrickdappollonio/claude-plugins --skill visual-plan
Clone the repo
git clone --depth 1 https://github.com/patrickdappollonio/claude-plugins

Made for: Claude Code, Codex.

Or install visual-docs, the plugin that ships this one along with the rest of its 2 skills.

Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,731 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 $0.00102 $0.04731
Opus 5 $0.00051 $0.02365
Sonnet 5 $0.00020 $0.00946
Haiku 4.5 $0.00010 $0.00473

Measured 3d ago against content hash cbf705d8aedb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

visual-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 3d ago.

The scan reads SKILL.md. This mod also ships 20 executable files (server/assets/app.js, server/assets/vendor/diff2html.min.js, server/assets/vendor/graphre.js, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

plugins/visual-docs/skills/visual-plan/SKILL.md · 353 lines

How it starts

The opening of the file, as written. The whole thing — 353 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Visual Plan

Turn a plan into an interactive document the user reviews in their browser, served entirely from their machine. The plan is a plain markdown file — the bundled server renders it with diagrams, diffs, and styled blocks, live-reloads as you edit it, and collects the user's comments for you to read back.

A plan says what we will do. A recap explains what changed; a plan explains what is wrong and what we will do about it. A section that diagnoses a problem and stops is the plan's most common failure — the reader finishes it asking "so what?" — and the linter flags it (document-quality §2b).

Before anything else, fix who you're writing for: the CEO of the company — a tech-savvy non-developer. Not a fellow engineer, not the person who wrote the code, and not someone who will ever open the repo. This shapes every sentence you write. They decide based on business logic — what changes, why it's worth it, what could go wrong — so explain behavior in plain language and reach for code only when the reader must see it to decide. The linter warns when plain-language sections name code symbols, and those findings must be fixed like any other.

Acknowledge first, then work quietly. Before you do anything else, reply with one short sentence that acknowledges the request and says you're gathering what you need — e.g. "Got it — let me dig into the code and put together a visual plan for the rate-limiting change." This is the one message the user should get up front; never jump straight into tool calls with no reply. Then spend your tokens on the document, not on narrating: do the research and inventory silently — no step-by-step play-by-play, no restating what you found — and surface next with the link (once served) and a one-line pointer. Put the budget you'd spend narrating into the plan's coverage instead.

The sequence — do every step, in order; the last two are the ones agents skip:

  1. Research the change and write the plan file.
  2. Inventory it (silently).
  3. Lint it and fix every finding — required, not optional (§3).
  4. Self-review the rendered document — required (§3): re-read it top to bottom against your inventory before anyone else sees it.
  5. Serve it and hand over the link.
  6. Read and act on comments — then back to 3 and 4 for every edit.

Every write runs write → lint → verify — the first draft and every revision. After an edit, do not serve, share, or say "done" until the linter is clean on that file and you have re-read the changed sections against its closing reminder. Revisions are where agents skip this.

Read the full file on GitHub · 353 lines

Files

What ships with it

31 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. 3d ago First seen · 353 lines · 102 tokens per session scan A cbf705d8aedb

Subscribe to this mod's changes

visual-plan is a skill published in the GitHub repository patrickdappollonio/claude-plugins (9 stars, last pushed 3d ago), licensed MIT. It adds 102 tokens to every session and 4,731 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 2026-08-31.

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