chore(governance): land missing docs/packaging before the standards#505 gates bite

[hyperpolymath]

Remediates this repo against the two governance gates promoted from advisory to blocking in hyperpolymath/standards#513 (closing standards#505).

Those gates previously could not fail: the docs check only emitted ::warning::, and the package-policy job ended in an unconditional ✅ Package policy check passed. They are now real, with a grace window — they begin blocking on 2026-08-21. This repo was measured as non-compliant, so this PR lands the missing files ahead of that date.

Added here: packaging

flake.nix

A dev shell, not a package build. Estate policy is Guix primary / Nix fallback; this is the fallback tier, and a guix.scm is welcome later to move to the primary.

• Packages mirror the tooling actually present in this repo (just), not a generic default.
• nixpkgs is pinned to an exact revision per the estate SHA-pinning rule.
• Verified: nix flake check passes (nix 2.35.1). Every package name was confirmed to exist in the pinned revision before generation — nothing here is guessed.

---

Part of an estate-wide sweep; 63 repos were identified as non-compliant. Third-party/forked repos (HOL, awesome-*, lua-filters) were excluded per the licence policy's do-not-touch rule.

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 282 issues detected

Severity	Count
🔴 Critical	44
🟠 High	135
🟡 Medium	103

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/tools/auth-method-batch-fix/main.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/tools/category-batch-fix/main.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/tools/missing-fields-batch-fix/main.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/tools/cartridge-minter/mint.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/tools/validate-cartridges/main.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/tools/validate-cartridges/main_test.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/cartridges/domains/code-quality/sanctify-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/cartridges/domains/infrastructure/hesiod-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/cartridges/domains/research/bofig-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server-cartridges/boj-server-cartridges/cartridges/domains/research/academic-workflow-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  }
]

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