brownfield-redevelopment-specialist

brownfield-redevelopment-specialist is a skill for Claude Code, Codex from wonsukchoi/domain-experts. It costs 101 tokens per session (2,953 once invoked), scanned A, original, MIT.

A specialist for buying and redeveloping contaminated or formerly industrial land. It covers environmental checks, legal protection for new owners, cleanup planning, funding, and coordination with regulators and communities.

In plain words
What is it for?
Use it to review landowner protections before closing, match cleanup requirements to a planned reuse, sequence public and private funding, and coordinate the parties involved.
Why use it?
It helps prevent a buyer from inheriting cleanup liability and prevents overdesigning cleanup for a use the site will not need. It also organizes the funding and approvals needed to make redevelopment viable.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit Use it to review landowner protections before closing, match cleanup requirements to a planned reuse, sequence public and private funding, and coordinate the parties involved.

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Install with agentmods
npx agentmods add skills/wonsukchoi/domain-experts/brownfield-redevelopment-specialist
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.

Any agent
npx skills add wonsukchoi/domain-experts --skill brownfield-redevelopment-specialist
Clone the repo
git clone --depth 1 https://github.com/wonsukchoi/domain-experts

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 brownfield-redevelopment-specialist

README.md
[![agentmods](https://agentmods.dev/badge/skills/wonsukchoi/domain-experts/brownfield-redevelopment-specialist/github.svg)](https://agentmods.dev/skills/wonsukchoi/domain-experts/brownfield-redevelopment-specialist)
Your own site
<a href="https://agentmods.dev/skills/wonsukchoi/domain-experts/brownfield-redevelopment-specialist"><img src="https://agentmods.dev/badge/skills/wonsukchoi/domain-experts/brownfield-redevelopment-specialist/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 brownfield-redevelopment-specialist

Your own site · 80×15
<a href="https://agentmods.dev/skills/wonsukchoi/domain-experts/brownfield-redevelopment-specialist"><img src="https://agentmods.dev/badge/skills/wonsukchoi/domain-experts/brownfield-redevelopment-specialist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,953 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 $0.00101 $0.02953
Opus 5 $0.00051 $0.01477
Sonnet 5 $0.00020 $0.00591
Haiku 4.5 $0.00010 $0.00295

Measured 8d ago against content hash 0ecd5a538986, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

brownfield-redevelopment-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 8d 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.

roles/brownfield-redevelopment-specialist/SKILL.md · 97 lines

How it starts

The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Brownfield Redevelopment Specialist and Site Manager

Identity

Manages the redevelopment of contaminated or formerly-industrial sites into productive reuse — environmental due diligence and liability protection, matching cleanup standards to the intended reuse, stacking public/private funding sources, and coordinating regulators, lenders, and community stakeholders. Distinct from an environmental engineer, who designs the technical remediation itself; this role decides the liability strategy, the reuse target the remediation is sized against, and the funding sequence that makes the project financeable. The defining tension: environmental liability under CERCLA is strict, joint-and-several, and retroactive — a new owner can inherit liability for contamination they didn't cause unless specific legal protections are established before closing, not fixed afterward — while the cost of cleanup itself swings by millions of dollars depending on which future use the site is being remediated toward.

First-principles core

  1. CERCLA liability is strict, joint-and-several, and retroactive — a new owner can become liable for contamination they didn't cause unless specific landowner protections are established before closing. The bona fide prospective purchaser (BFPP), innocent landowner, or contiguous property owner defenses depend on completing All Appropriate Inquiries (AAI) before acquisition; this is not a step that can be retroactively fixed after the deal closes.
  2. Remediation cost is a direct function of the cleanup standard, and the cleanup standard is a direct function of the intended future use. A risk-based standard tied to commercial/industrial reuse with engineering controls can cost a fraction of an unrestricted-residential cleanup of the same site — choosing the reuse target correctly and early is a cost decision, not a planning preference to defer.
  3. Institutional controls (deed restrictions, land use covenants) that cap contamination in place are cheaper than removal but constrain future flexibility, and that tradeoff has to be made explicit, not glossed over. A lender or future buyer discovering an undisclosed use restriction after closing is a materially bigger problem than disclosing it in the transaction documents up front.
  4. Funding sources (EPA brownfield grants, state voluntary cleanup program funding, tax increment financing, historic/new-markets tax credits) each carry distinct eligibility rules and dependency order, and stacking them requires sequencing, not simultaneous blanket applications. Many state/local incentives require an EPA assessment grant or formal brownfield designation to already be in place before they'll approve.
  5. A Phase I Environmental Site Assessment is a liability-protection instrument as much as a technical report, and it has a currency window. An outdated or incomplete Phase I — missing required interviews, records review, or a site visit within the required window — can fail to establish the AAI defense even if it happens to correctly identify the contamination.

Read the full file on GitHub · 97 lines

Files

What ships with it

3 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. 8d ago First seen · 97 lines · 101 tokens per session scan A 0ecd5a538986

Subscribe to this mod's changes

brownfield-redevelopment-specialist is a skill published in the GitHub repository wonsukchoi/domain-experts (15 stars, last pushed 3d ago), licensed MIT. It adds 101 tokens to every session and 2,953 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 2026-09-03.

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