What is deep-prospecting-v4?

A real-estate lead research workflow for identifying and verifying the heirs or decision-makers behind a deceased or hard-to-trace property owner.

Use it to investigate property addresses, probate dockets, foreclosure notices, and similar records, then identify who may need to sign a sale.

It addresses common research errors, such as treating a surname match as proof of a child relationship or overlooking conflicts in reported dates of death.

deep-prospecting-v4 — Skill by DataSift-Ty-Personal/SiftStack

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 DataSift-Ty-Personal/SiftStack --skill deep-prospecting-v4

Clone the repo

git clone --depth 1 https://github.com/DataSift-Ty-Personal/SiftStack

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/datasift-ty-personal/siftstack/deep-prospecting-v4/github.svg)](https://agentmods.dev/skills/datasift-ty-personal/siftstack/deep-prospecting-v4)

Your own site

<a href="https://agentmods.dev/skills/datasift-ty-personal/siftstack/deep-prospecting-v4"><img src="https://agentmods.dev/badge/skills/datasift-ty-personal/siftstack/deep-prospecting-v4/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/datasift-ty-personal/siftstack/deep-prospecting-v4"><img src="https://agentmods.dev/badge/skills/datasift-ty-personal/siftstack/deep-prospecting-v4.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 157 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 11,288 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00157	$0.11288
Opus 5.5	$0.00063	$0.04515
Sonnet 5.5	$0.00031	$0.02258
Haiku 4.5	$0.00016	$0.01129

Measured 2mo ago against content hash 108b7e71825b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

deep-prospecting-v4 scanned grade A with 1 finding 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/enformion_person_search.py, scripts/scrapfly_fetch.py), 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

In the SiftStack pipeline this is `src/scrapfly_browser.py` (importable `ScrapflyBrowserClient.fetch(url)`), and `run_deep_prospect.py --fallback-urls "<deed>,<obit>,<docket>"` pulls these pages inline during the same he

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

deep-prospecting — 88% identical, 72 lines differ

skills/deep-prospecting-v4/SKILL.md · 777 lines

How it starts

The opening of the file, as written. The whole thing — 777 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Deep Prospecting

Deep prospecting is the process for identifying and verifying the heirs/decision-makers (owner/heir/executor) behind a distress lead, and determining who must actually sign for the property to sell. Core philosophy: "When everyone hits a wall, we bring a shovel."

Updated edition (v4). Productionized against a live Enformion/Endato integration. Hardening since v3:

Detect API failure by HTTP status, never by the always-present error object.

Never infer "child" from a surname match alone. relativeLevel "ab" is closest kin, which also includes the spouse, siblings, and parents. Use relativeType, and match the surname as a whole last-name token (not a substring: "Maxwell" is not a "Well").

Recover the year from masked/partial dates (9/XX/1955, 3/XX/2026) and dict-shaped death fields.

Anchor the DOD sanity check to the notice's PUBLICATION date, not the date you ingested the record.

Surface, never silently resolve, a death-index vs obituary DOD conflict.

Ships a runnable, dependency-light reference script (scripts/enformion_person_search.py) and a full field schema (references/enformion-person-search.md).

Two Paths - Pick API-First

Path	When	Reliability	Cost/record
Primary: API-Based Heir Resolution (recommended)	You have Enformion/Endato + Trestle API access	HIGH - heir set comes from the provider's relationship graph; deterministic; nothing inferred	~$2.30-3.00
Fallback: 3-Site Browser Waterfall	No API access, or API returns thin data	MEDIUM - manual assembly from obituaries/people-search sites; slower; hallucination risk	$0-0.15 + your time

Use the Primary Path below first. It replaces hours of manual obituary and genealogy hunting with a handful of API calls and produces a grounded heir set, a signing analysis, and scored phones. Drop to the browser waterfall only when the API can't resolve a record.

Read the full file on GitHub · 777 lines

Files

What ships with it

6 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.

2mo ago First seen · 777 lines · 157 tokens per session scan A 108b7e71825b

Subscribe to this mod's changes

deep-prospecting-v4 is a skill published in the GitHub repository DataSift-Ty-Personal/SiftStack (23 stars, last pushed 23d ago), licensed MIT. It adds 157 tokens to every session and 11,288 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Research

deep-prospecting-v4 next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
deep-prospecting-v4DataSift-Ty-Personal/SiftStack	Skill	23	23d ago	MIT	A	157	Claude Code, Codex
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code

deep-prospecting-v4