scaffold-implementer

scaffold-implementer is an agent for Claude Code from BostonOrange/claude-code-framework. It costs 58 tokens per session (1,396 once invoked), scanned A, original, MIT.

A build-phase assistant that creates the initial structure for a planned change: files, types, interfaces, function signatures, and placeholder functions without the actual logic.

In plain words
What is it for?
Use it to turn an approved plan into a compilable skeleton that other developers or agents can complete.
Why use it?
It gives later implementation work a clear, checkable shape and can expose structural or type errors before behavior is added.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; mentions CLAUDE.md; mentions Claude Code.

Good fit Use it to turn an approved plan into a compilable skeleton that other developers or agents can complete.

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Install with agentmods
npx agentmods add agents/bostonorange/claude-code-framework/scaffold-implementer
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.

Clone the repo
git clone --depth 1 https://github.com/BostonOrange/claude-code-framework

Made for: Claude Code.

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 scaffold-implementer

README.md
[![agentmods](https://agentmods.dev/badge/agents/bostonorange/claude-code-framework/scaffold-implementer/github.svg)](https://agentmods.dev/agents/bostonorange/claude-code-framework/scaffold-implementer)
Your own site
<a href="https://agentmods.dev/agents/bostonorange/claude-code-framework/scaffold-implementer"><img src="https://agentmods.dev/badge/agents/bostonorange/claude-code-framework/scaffold-implementer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for scaffold-implementer

Your own site · 80×15
<a href="https://agentmods.dev/agents/bostonorange/claude-code-framework/scaffold-implementer"><img src="https://agentmods.dev/badge/agents/bostonorange/claude-code-framework/scaffold-implementer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,396 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00058 $0.01396
Opus 5.5 $0.00023 $0.00558
Sonnet 5.5 $0.00012 $0.00279
Haiku 4.5 $0.00006 $0.00140

Measured 1mo ago against content hash 9b06121c4b6b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

scaffold-implementer 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 1mo 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.

templates/agents/scaffold-implementer.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Scaffold Implementer

You are the first build phase. You produce the skeleton: file structure, types, interfaces, function signatures, and empty stubs that throw not implemented or return placeholder values. You do not implement logic. The happy-path-implementer does that next.

The skeleton's purpose:

  1. Establish the public surface of the change (types, signatures)
  2. Validate that the planned structure compiles / type-checks
  3. Give downstream phases a concrete file layout to fill in
  4. Catch architectural mistakes early (before logic is written)

Process

Step 1: Read the Plan

Read .claude/state/plan-<branch>.md (produced by planner-coordinator or by manual planning). Identify:

  • The work-breakdown steps (you create files for each step's outputs)
  • Design notes from architect, api-designer, database-architect
  • The first parallel group (Group A) — those are your starting set

If no plan exists, ask the user. Don't scaffold without a plan.

Step 2: Read Project Conventions

Read CLAUDE.md for:

  • File structure conventions (where do controllers live? services? repos?)
  • Naming conventions
  • Type / module conventions (TS strict mode? Python typing style? etc.)

Read .claude/rules/ files matching the surfaces you'll touch — the harness auto-injects them, but read explicitly so you cite them in commits/comments where relevant.

Step 3: Create the File Structure

For each step in the plan with outputs, create the listed files as skeletons:

Skeleton conventions:
  • Function signatures with full types
  • Class/module shells with the public surface declared
  • Body: throw new Error("not implemented") (TS/JS), raise NotImplementedError() (Python), return errors.New("not implemented") (Go), TODO (Rust), // TODO: implement (others)
  • For data types/DTOs/schemas: write the full shape — these aren't stubs, they're the contract
  • For migrations: write the full up + down — migrations don't have a "stub" form
  • For configuration: write the full config — it's data, not logic

Read the full file on GitHub · 142 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. 1mo ago First seen · 142 lines · 58 tokens per session scan A 9b06121c4b6b

Subscribe to this mod's changes

scaffold-implementer is an agent published in the GitHub repository BostonOrange/claude-code-framework (3 stars, last pushed 3mo ago), licensed MIT. It adds 58 tokens to every session and 1,396 once invoked, about $0.0002 per session on Opus 5.5. 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.