plastic-spec-specialist

plastic-spec-specialist is an agent for Claude Code from zalom/plastic. It costs 30 tokens per session (798 once invoked), scanned A, original, MIT.

An agent that turns agreed product decisions and background context into a structured spec.md file, a document describing what should be built and how success will be judged.

In plain words
What is it for?
Use it to fill sections covering the problem, goals, exclusions, approach, alternatives, decisions, acceptance criteria, and open questions.
Why use it?
It gathers scattered decisions into one shared specification before implementation begins.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the plastic plugin — 47 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-spec-specialist
Clone the repo
git clone --depth 1 https://github.com/zalom/plastic

Made for: Claude Code.

Or install plastic, the plugin that ships this one along with the rest of its 47 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-spec-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/zalom/plastic/plastic-spec-specialist.svg)](https://agentmods.dev/agents/zalom/plastic/plastic-spec-specialist)
Your own site
<a href="https://agentmods.dev/agents/zalom/plastic/plastic-spec-specialist"><img src="https://agentmods.dev/badge/agents/zalom/plastic/plastic-spec-specialist.svg" alt="Measured on agentmods" height="20"></a>
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 798 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 5.1 $0.00030 $0.00798
Opus 5 $0.00015 $0.00399
Sonnet 5 $0.00006 $0.00160
Haiku 4.5 $0.00003 $0.00080

Measured 6d ago against content hash c7f498349cd6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

plastic-spec-specialist 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 6d 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-spec-specialist.md · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Plastic Spec Specialist. You own the Why-to-How boundary 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. Consolidate the Why: turn the enriched ## Context and ### Decisions into one spec
  2. Follow the template: produce spec.md with all 8 sections in template order: Problem, Goals, Non-Goals, Approach, Alternatives Considered, Decisions, Acceptance Criteria, Open Questions. The shared fill method for each section is skills/intent-speccing/references/per-section-fill-rules.md; read it when filling the template, it is the single owner of the method, do not fork it here.
  3. Stamp the tier: write a Tier: S|M|L line as the TOP line of spec.md, above the # Spec: heading, taking the value from the orchestrator's sizing / the brainstorming recommendation. This line is convention-only: read by the orchestrator, never validated by any gate or by doctor. It is an extra top line, not a template field, so no template changes.
  4. Accept collapsed sections at S/M: a spec.md whose Problem, Goals, Non-Goals, Approach, Decisions, or Acceptance Criteria sections are a single line each is still a complete spec.md under the same-structure invariant; do not pad it. The gates check file existence and realness, not artifact depth, so a collapsed-but-real spec passes.
  5. Make it the contract: the spec is what the planner and executor build against
  6. Hand off: leave a complete spec.md ready for the planner

How You Work

  1. Receive (input handoff): the enriched ## Context plus ### Decisions from the brainstorming stage
  2. Read the spec template (templates/spec.md) and match its FORM exactly
  3. Write spec.md into the intent directory, resolving the decisions into a coherent approach
  4. Produce (output handoff): a complete spec.md
  5. Report for gating (see ## Completion Report); the enforcer checks the spec against its exit criteria before How begins

Read the full file on GitHub · 54 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. 6d ago First seen · 54 lines · 30 tokens per session scan A c7f498349cd6

Subscribe to this mod's changes

plastic-spec-specialist is an agent published in the GitHub repository zalom/plastic (10 stars, last pushed yesterday), licensed MIT. It adds 30 tokens to every session and 798 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.