{
 "number": 36193,
 "input_hash": "942e2affaab29da7",
 "model": "openrouter/google/gemini-3.8-flash",
 "batch": false,
 "created": "2026-09-17T16:23:16+00:00",
 "provider": "Google",
 "stop_reason": "end_turn",
 "usage": {
  "input_tokens": 34474,
  "cache_creation_input_tokens": 0,
  "cache_read_input_tokens": 0,
  "output_tokens": 1919
 },
 "cost_usd": 0.03305175,
 "error": null,
 "result": {
  "display": {
   "goal": [
    "Reduce release binary sizes by roughly half a megabyte",
    "Disable unused wchar_t and zoneinfo features in non-GUI Linux libstdc++ builds"
   ],
   "reviewability": [
    "Ready to review",
    "Review base PR 36272 first"
   ],
   "agreement": [
    "Concept supported with successful Guix build verification (hebasto, willcl-ark, rustaceanrob)",
    "Base toolchain split request was addressed by the author (hebasto)"
   ],
   "categories": [
    {
     "name": "build",
     "why": [
      "P3 because it trims binary bloat from release builds without functional regressions",
      "Saves roughly 500 KB per non-GUI executable in Guix Linux releases"
     ]
    }
   ]
  },
  "summary": "Configures libstdc++ in Guix Linux toolchains for non-GUI binaries with `--disable-wchar_t` and `--with-libstdcxx-zoneinfo=no`. Also patches Boost Test in depends to avoid unresolved `std::wcrtomb` symbols when wchar_t support is removed.",
  "problem": "Release Linux binaries bundle unused wide-character formatting and zoneinfo routines in libstdc++, adding roughly 0.5 MB of unnecessary size to bitcoind, bitcoin-cli, and other non-GUI utilities.",
  "discussion": {
   "open_concerns": [],
   "resolved_concerns": [
    "Whether Boost.MultiIndex or Boost Test would break without wchar_t; author added a patch for Boost Test and hebasto noted Boost auto-detects missing wchar_t defines.",
    "Toolchain separation logic was split into PR 36272 at reviewer request."
   ],
   "author_status": "Active, recently rebased and addressed feedback by splitting out prerequisite PR 36272."
  },
  "reviewability": {
   "state": "Ready",
   "label": "Review #36272 first",
   "reason": "The PR is stacked on #36272, which isolates the toolchain definition refactor. Reviews can proceed directly or start with the base."
  },
  "agreement": {
   "state": "Positive",
   "summary": "Concept ACK and verified Guix reproducible builds; toolchain split concern addressed",
   "reason": "hebasto provided a Concept ACK after verifying the Boost macro interaction, and multiple contributors confirmed matching Guix build hashes across architectures.",
   "evidence": [
    "hebasto posted 'Concept ACK.' after discussing Boost defines and toolchain splitting.",
    "willcl-ark and rustaceanrob posted identical matching Guix build outputs for multiple targets."
   ]
  },
  "dependencies": {
   "depends_on": [
    36272
   ],
   "enables": []
  },
  "categories": [
   {
    "name": "build",
    "member": true,
    "evidence": "Modifies Guix toolchain definitions, build manifests, and depends packages for Boost.",
    "band": "P3",
    "reason_tag": "cleanup",
    "score": 0.35,
    "factors": {
     "security_stability": 0,
     "bug_severity": 0,
     "performance": 1,
     "user_value": 1,
     "leverage": 0
    },
    "rationale": "Reduces non-GUI release binary sizes by approximately 0.5 MB across Linux release binaries by stripping unused libstdc++ functionality. The benefit is measurable and clean, though reasonably deferrable."
   },
   {
    "name": "tools",
    "member": false,
    "evidence": "Touches Guix release build scripts and depends configuration rather than developer utilities or contrib CLI tools.",
    "band": "Unranked",
    "reason_tag": "",
    "score": 0,
    "factors": {
     "security_stability": 0,
     "bug_severity": 0,
     "performance": 0,
     "user_value": 0,
     "leverage": 0
    },
    "rationale": "Not a tools category PR."
   }
  ],
  "confidence": "high",
  "uncertainties": [],
  "needs": [],
  "card": "This PR configures libstdc++ in Guix Linux release builds to disable wchar_t and zoneinfo for non-GUI binaries, accompanied by a small Boost Test patch. This reduces the binary footprint of bitcoind, bitcoin-cli, and other command-line tools by roughly 0.5 MB each. Multiple reviewers have verified reproducible Guix build outputs across architectures, and hebasto Concept ACKed the change. The PR is stacked on #36272."
 },
 "raw_text": null
}