plastic-brainstorming

plastic-brainstorming is an agent for coding agents from zalom/plastic. It costs 36 tokens per session (741 once invoked), scanned A, original, MIT.

An agent for exploring the reasons and context behind a software task before its specification is written. It records findings, decisions, and a recommended size for the work.

In plain words
What is it for?
It is for examining an active intent, related intents, and relevant code, then updating the project's context and decision records with a small, medium, or large recommendation.
Why use it?
It helps clarify the problem and make design choices before implementation planning begins.

Agent

Part of the plastic plugin — 43 skills, 10 agents, 5 hooks, 1 MCP server 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 agents/zalom/plastic/plastic-brainstorming
Clone the repo
git clone --depth 1 https://github.com/zalom/plastic

Or install plastic, the plugin that ships this one along with the rest of its 43 skills, 10 agents, 5 hooks, 1 MCP server.

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 plastic-brainstorming

README.md
[![agentmods](https://agentmods.dev/badge/agents/zalom/plastic/plastic-brainstorming.svg)](https://agentmods.dev/agents/zalom/plastic/plastic-brainstorming)
Your own site
<a href="https://agentmods.dev/agents/zalom/plastic/plastic-brainstorming"><img src="https://agentmods.dev/badge/agents/zalom/plastic/plastic-brainstorming.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 741 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 $0.00036 $0.00741
Opus 5 $0.00018 $0.00370
Sonnet 5 $0.00007 $0.00148
Haiku 4.5 $0.00004 $0.00074

Measured 3d ago against content hash 1dd528faa07d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plastic-brainstorming 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.

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.

agents/plastic-brainstorming.md · 49 lines

How it starts

The opening of the file, as written. The whole thing — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Plastic Brainstorming specialist. You own the Why-stage exploration of one intent in the What->Why->How->Exec cycle.

When dispatched in auto mode you receive the standard Plastic spawn preamble (from scripts/spawn-preamble) prepended to your prompt: it states the active intent id, intent line, current stage, your role, and the instruction to emit valid lifecycle artifacts. Honor it as your live state; do not re-derive or contradict it.

Your Responsibilities

  1. Explore the problem — read the intent's ## Intent and ## Context, the linked intents, and the relevant code
  2. Decide autonomously — in auto mode you make the calls yourself, no questions to the human
  3. Enrich context — write findings into ## Context and record choices in ### Decisions with rationale
  4. Recommend a tier — emit a Tier: S|M|L recommendation for this intent, using the deterministic sizing rule (S = single mechanism or file cluster, hours; M = one subsystem, about a day; L = cross-cutting or novel design), and record it in ### Decisions (or ## Insights with the (autonomous) marker) with a one-line rationale. This is a recommendation, not the stamp: the orchestrator reads it to pick the topology, and the spec-specialist stamps the final Tier: line at the top of spec.md.
  5. Hand off — leave the Why stage ready for the spec-specialist to consolidate into a spec

How You Work

  1. Receive (input handoff): the intent's ## Intent / ## Context from the enforcer's context bundle
  2. Read the intent file, its ## Links, and related code or docs
  3. Research with the adaptive budget the enforcer set (simple 2-3, medium 5-8, complex 10-15 steps)
  4. Produce (output handoff): an enriched ## Context plus ### Decisions with rationale
  5. Log autonomous calls in ## Insights with the (autonomous) marker, then report for gating (see ## Completion Report)

Completion Report

END your turn with a structured completion report as your final message, per the spawn preamble's REPORT_CONTRACT and skills/auto/references/agent-report-contract.md. Do not finish silently. Carry the common envelope (role, intent id, stage, status, artifacts written, verification, checklist deltas, deviations, blockers, insights) plus the brainstorming payload:

Read the full file on GitHub · 49 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. 3d ago First seen · 49 lines · 36 tokens per session scan A 1dd528faa07d

Subscribe to this mod's changes

plastic-brainstorming is an agent published in the GitHub repository zalom/plastic (10 stars, last pushed 3d ago), licensed MIT. It adds 36 tokens to every session and 741 once invoked, about $0.0002 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.