test(kr-7): generator index must be positive (no sigma 0, no negative)

[hyperpolymath]

Summary

Implements KR-7 from PROOF-NARRATIVE.md §3 (added in PR #23):

sigma N, sigma_inv N, cup N, cap N are accepted iff N >= 1.

The canonical parser in KRLAdapter.jl already raises a "zero index" error for sigma 0, and negative indices fall outside the lexer's positive-Int recognition. This PR adds a smoke-test assertion that no committed example contains either pattern.

What's added

tests/smoke/grammar_smoke.sh check 4b — for each .krl example:

• Grep for <gen> 0 (whitespace-separated zero index). Fail if present.
• Grep for <gen> -<digits> (negative index). Fail if present.
• Report a positive check when the file contains no violation.

Verification

Locally:

Run	Result
Original 4 examples	20 passing checks (was 16; +1 KR-7 pass per file × 4 files)
Synthetic let bad = (sigma 0); close bad;	Correctly fails with generator with zero index violates KR-7 (sigma 0)

What this does NOT do

This is a smoke check, not a parser-correctness proof. The full KR-7 discharge requires a parser-level property test (deferred — see TEST-NEEDS.md TG-K3 entry added in PR #23). The smoke version catches accidental commits of malformed examples and stays in the existing lexical-level CI lane.

Cross-references

• PROOF-NARRATIVE.md KR-7 (added in PR docs(proof): KRL-specific proof narrative + assumption registry; drop template content #23)
• ASSUMPTIONS.md A-KR-2.1
• TEST-NEEDS.md TG-K3

Test plan

• Original examples pass (20/20 checks, was 16/16).
• Synthetic violation caught.
• GPG-signed commit.
• Edited file passes the global pre-commit Owner check (shell script — license header preserved).
• Auto-merge with squash + branch delete.

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 71 issues detected

Severity	Count
🔴 Critical	4
🟠 High	7
🟡 Medium	60

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "Action perpolymath/standards/.github/workflows/governance-reusable.yml@main\n needs attention",
    "type": "unpinned_action",
    "file": "governance.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in boj-build.yml",
    "type": "missing_timeout_minutes",
    "file": "boj-build.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in codeql.yml",
    "type": "missing_timeout_minutes",
    "file": "codeql.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in dependabot-automerge.yml",
    "type": "missing_timeout_minutes",
    "file": "dependabot-automerge.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in dogfood-gate.yml",
    "type": "missing_timeout_minutes",
    "file": "dogfood-gate.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in dogfood-gate.yml",
    "type": "missing_timeout_minutes",
    "file": "dogfood-gate.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in dogfood-gate.yml",
    "type": "missing_timeout_minutes",
    "file": "dogfood-gate.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in dogfood-gate.yml",
    "type": "missing_timeout_minutes",
    "file": "dogfood-gate.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in dogfood-gate.yml",
    "type": "missing_timeout_minutes",
    "file": "dogfood-gate.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in governance.yml",
    "type": "missing_timeout_minutes",
    "file": "governance.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  }
]

Powered by Hypatia Neurosymbolic CI/CD Intelligence