# lancegui > Open-source publisher. Listings imported from github.com/lancegui — credited to the original author with their license. - **Listings:** 17 - **Total installs:** 0 - **Profile:** https://agentstack.voostack.com/s/lancegui - **Website:** https://github.com/lancegui ## Published listings - [Analysis Checkpoints](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-analysis-checkpoints) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-analysis-checkpoints` Use throughout the EXECUTION of any analysis — while running, debugging, modeling, or cleaning data — to decide which decisions you may make on your own and which you must STOP and bring to the user first. Forces a human-in-the-loop checkpoint before any consequential analytical choice — changing the research design, estimand, or identification strategy; deviating from the framed question or pre-… - [Data Preparation](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-data-preparation) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-data-preparation` Use when building, cleaning, or assembling the DATASET an analysis runs on in R, Julia, or Python — the moment someone says "clean the data", "the data is messy", "build/assemble the panel", "construct the dataset", "merge these files into one dataset", "prep the data", "dedupe these records", "reconcile the totals", or "recode these variables". Owns the data-ingest-and-cleaning PHASE — decomposi… - [Executing Analysis Plans](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-executing-analysis-plans) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-executing-analysis-plans` Use once an analysis brief or pre-analysis plan is APPROVED and it's time to actually run the analysis — build the dataset, estimate the primary specification, run the robustness suite, placebo tests, and alternative designs, then assemble the results. Drives execution through the plan step by step, validating each step (data-contracts) and stopping for the user at consequential decisions (analys… - [Causal Identification](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-causal-identification) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-causal-identification` Use whenever an analysis makes or implies a CAUSAL claim — "the effect of", "X caused Y", "the policy raised", "the treatment increased", "because we did X, Y changed" — or whenever you're running difference-in-differences, event studies, instrumental variables, regression discontinuity, matching, synthetic control, or panel fixed-effects models. Forces the identification strategy and its assumpt… - [Pre Analysis Plan](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-pre-analysis-plan) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-pre-analysis-plan` Use BEFORE running a confirmatory analysis, an experiment readout, an A/B test, a policy evaluation, or any study whose credibility depends on not having fished for the result — especially causal/econometric work. Locks the hypotheses, estimand, primary specification, sample and exclusions, and the robustness suite while the outcomes are still unseen, so the analysis is confirmatory rather than a… - [Question Framing](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-question-framing) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-question-framing` >- - [Predictive Modeling](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-predictive-modeling) — Skill · Free — `agentstack add skill-lancegui-causal-powers-predictive-modeling` >- - [Analysis Craft](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-analysis-craft) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-analysis-craft` Use when WRITING or EDITING analysis code, notebooks, or data pipelines in R, Julia, or Python — keeping the code minimal, surgical, and legible rather than over-engineered. Use whenever you're about to add a class/framework to a one-off script, refactor a working pipeline you were only asked to tweak, build configurability nobody requested, or rewrite someone's analysis while making an unrelated… - [Analysis State Management](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-analysis-state-management) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-analysis-state-management` Use whenever an analysis plan, phase state, decision log, artifact registry, run record, or subagent handoff needs to be created, updated, resumed, or compacted. Replaces the old habit of growing and rereading one root analysis-plan.md with a small docs/analysis/ YAML index and task-specific records. Use at phase boundaries, before/after compaction, when recording approved deviations, when regist… - [Structural Estimation](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-structural-estimation) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-structural-estimation` Use whenever an analysis estimates the PRIMITIVES of an economic model — preferences/utility, costs, information/consideration, search, or conduct — or needs a COUNTERFACTUAL the data doesn't contain (a merger, a new product, a tax, a removed friction, welfare/surplus, equilibrium re-pricing). Fires for structural demand estimation (logit, random-coefficients/BLP), supply-side markup-and-cost rec… - [Data Contracts](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-data-contracts) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-data-contracts` >- - [Analysis Review](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-analysis-review) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-analysis-review` Use when reviewing a data analysis, notebook, script, model, or result — your own before you ship it, a colleague's before it's published, or one handed to you to "check" or "sanity-check" — in R, Julia, Python, or Stata. Hunts specifically for the silent-failure classes that pass code review but produce wrong answers — unchecked joins, leakage, fished specifications, unreconciled totals, undefin… - [Descriptive Evidence](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-descriptive-evidence) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-descriptive-evidence` >- - [Wrong Number Debugging](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-wrong-number-debugging) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-wrong-number-debugging` Use the moment a computed result looks wrong, surprising, suspicious, or "off" — a total that doesn't reconcile, revenue that tripled after a join, a mean that moved, a coefficient with the wrong sign, a count that's too high or too low, a metric that disagrees with another team's. Bisects the data pipeline to find the exact step where the number went bad, tracing provenance backward instead of g… - [Project Organization](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-project-organization) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-project-organization` Use when finishing a piece of analysis and about to commit or push, when a directory has accreted files and it's unclear what is a deliverable versus scratch, when setting up or reorganizing a research repository, or when asked to clean up the directory, organize the repo, standardize naming, or make a project reproducible. Also fires throughout the work — when creating a new script, dataset, tab… - [Result Verification](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-result-verification) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-result-verification` Use BEFORE reporting a number, presenting a finding, sending an analysis to a stakeholder, putting a figure in a deck or paper, or claiming an analysis is "done" or "the result is X". Reconciles totals to source, reproduces the result from a clean session with a fixed seed, runs robustness and sensitivity checks, and confirms every figure and table matches the numbers in the prose — evidence befo… - [Using Causal Powers](https://agentstack.voostack.com/l/skill-lancegui-causal-powers-using-causal-powers) — Skill · Free · security-reviewed — `agentstack add skill-lancegui-causal-powers-using-causal-powers` Use when starting any data analysis, econometrics, or causal-inference task in R, Julia, or Python — establishes the Causal Powers discipline and routes to the right skill (question-framing, descriptive-evidence, pre-analysis-plan, analysis-state-management, data-contracts, data-preparation, analysis-craft, analysis-checkpoints, executing-analysis-plans, wrong-number-debugging, result-verificatio… --- Seller on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Install any with `agentstack add `.