lean-strict-verification-gate

name	lean-strict-verification-gate
description	Use when checking whether a Lean artifact can safely support a research claim.

Lean Strict Verification Gate

Windows Runtime Commands

On native Windows, use the managed Windows runner and the native runtime command target. For Codex-only installs the runtime is usually %USERPROFILE%\.codex\runtime; for multi-agent installs it is usually %LOCALAPPDATA%\ai-agents-skills\runtime. Set $runtime to the installed runtime root, then run:

$runtime = if ($env:AAS_RUNTIME_ROOT) { $env:AAS_RUNTIME_ROOT } elseif (Test-Path "$env:USERPROFILE\.codex\runtime") { "$env:USERPROFILE\.codex\runtime" } else { "$env:LOCALAPPDATA\ai-agents-skills\runtime" }
& "$runtime\run_skill.bat" "skills/lean-strict-verification-gate/run_lean_strict_verification_gate.bat" doctor

PowerShell runner target:

& "$runtime\run_skill.ps1" "skills/lean-strict-verification-gate/run_lean_strict_verification_gate.ps1" doctor

POSIX examples below use run_skill.sh and .sh command targets; use the Windows command target above on native Windows.

Use this skill to prevent overclaiming from generated Lean, skeletons, partial formalizations, or checker output. It separates:

• syntactic/safety scan
• placeholder and trust-base status
• optional local Lean typecheck
• statement-equivalence review, which remains a human/lead review step

Runtime Helper

Check the local tool status:

bash ~/.codex/runtime/run_skill.sh \
  skills/lean-strict-verification-gate/run_lean_strict_verification_gate.sh doctor

Run non-installing version/toolchain probes when you need reproducibility metadata:

bash ~/.codex/runtime/run_skill.sh \
  skills/lean-strict-verification-gate/run_lean_strict_verification_gate.sh doctor --probe

Scan a Lean file without running Lean:

bash ~/.codex/runtime/run_skill.sh \
  skills/lean-strict-verification-gate/run_lean_strict_verification_gate.sh scan \
  --input formal/final/proof.lean \
  --artifact-stage final_candidate

Optionally typecheck only when Lean is already installed:

bash ~/.codex/runtime/run_skill.sh \
  skills/lean-strict-verification-gate/run_lean_strict_verification_gate.sh verify \
  --input formal/final/proof.lean \
  --artifact-stage final_candidate \
  --typecheck

For a user-managed Lake workspace, use the explicit Lake environment runner. The helper requires a project root containing lakefile.lean or lakefile.toml, records the project context, and still runs the scanner before typechecking:

bash ~/.codex/runtime/run_skill.sh \
  skills/lean-strict-verification-gate/run_lean_strict_verification_gate.sh verify \
  --input formal/final/proof.lean \
  --artifact-stage final_candidate \
  --typecheck \
  --runner lake-env-lean \
  --project-root /path/to/lean/project

Set AAS_LEAN or AAS_LAKE to select a specific already-installed local executable. Invalid explicit paths fail closed instead of silently using a different tool.

The helper never installs Lean, Lake, mathlib, npm packages, Python packages, credentials, services, or MCP servers. Missing Lean reports tool_unavailable.

Blocking Policy

Before any typecheck, the scanner blocks active:

• #eval
• IO.Process
• run_cmd
• unsafe
• initialize
• @[extern]
• foreign/FFI import patterns
• non-allowlisted imports unless explicitly passed with --allow-import
• Lake/package files unless explicitly reviewed outside this helper

Final or claim-supporting artifacts also block on active sorry, admit, unsanctioned axiom, unknown trust base, or unreviewed generated proof text. Stubs may contain placeholders only when explicitly marked artifact_stage = stub.

Recommended templates

When this skill is involved, consider these workflow templates (install via the workflow-templates artifact profile, or --with-deps to pull backing skills):

• informal-to-lean-formalization-runbook -- Local-first intake mapping an informal proof to Lean declarations with a scanner-first verification gate separating typecheck status from claim support.