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fof-preflight

@Tupatuko2023/Python-R-Scripts
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Diff-aware guardrail checker for Fear-of-Falling (FOF) changes; fails closed on raw data edits, Kxx intro/req_cols mismatches, and output discipline risks.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name fof-preflight
description Diff-aware guardrail checker for Fear-of-Falling (FOF) changes; fails closed on raw data edits, Kxx intro/req_cols mismatches, and output discipline risks.
metadata [object Object]

How to use

Run from the Fear-of-Falling subproject root or repo root.

Example:

python .codex/skills/fof-preflight/scripts/preflight.py

Inputs

  • Git working tree diff (git diff --name-only --diff-filter=ACMRTUXB).
  • Kxx R scripts under Fear-of-Falling/R-scripts/ (or R-scripts/).
  • Policy sources: Fear-of-Falling/CLAUDE.md, Fear-of-Falling/QC_CHECKLIST.md.

Outputs

  • Console summary with PASS/WARN/FAIL.
  • Exit code 0 only if no FAIL conditions are found.

Failure modes

  • Not a git repo or diff fails.
  • Any change under data/ or data/external/.
  • Kxx .R scripts missing the standard intro/Required vars block.
  • Required vars list cannot be parsed unambiguously.
  • req_cols <- c(...) cannot be parsed or has multiple definitions.
  • Required vars list does not match req_cols 1:1.
  • Suspicious outputs/ usage not under R-scripts/<script>/outputs/.

Safety/guardrails

  • FAIL CLOSED: if a rule cannot be verified, the script exits 1 with context.
  • No external APIs or network calls.
  • Does not modify data or outputs.
  • If other raw-data root paths are discovered in docs/scripts, do not add them without explicit user confirmation (fail closed and request clarification).

Sources: Fear-of-Falling/CLAUDE.md, Fear-of-Falling/QC_CHECKLIST.md.