What's Changed

• Updated allocator and added nix packaging. by @psynyde in https://github.com/nullclaw/nullclaw/pull/14
• Fix OpenAI provider for GPT-5 models: use max_completion_tokens and omit explicit temperature for gpt-5* by @DonPrus in https://github.com/nullclaw/nullclaw/pull/22
• Fix Gemini provider memory leak and environment-dependent test failures by @dkd-dobberkau in https://github.com/nullclaw/nullclaw/pull/21
• Fix Config memory leaks: arena-based deinit for all 17 call sites by @DonPrus in https://github.com/nullclaw/nullclaw/pull/24
• Harden parseFunctionTagCall + dispatcher fallback chain (#16) by @DonPrus in https://github.com/nullclaw/nullclaw/pull/26
• Add OpenAI Codex provider for ChatGPT subscription API (#23) by @DonPrus in https://github.com/nullclaw/nullclaw/pull/29
• Fix #28: graceful degradation on tool iteration limit + translate Rus… by @DonPrus in https://github.com/nullclaw/nullclaw/pull/30
• Fix OpenAI Codex auth: User-Agent headers, --import-codex, Codex CLI … by @DonPrus in https://github.com/nullclaw/nullclaw/pull/31
• cli: add version command support by @chenrui333 in https://github.com/nullclaw/nullclaw/pull/32
• feat(providers): Added Poe by @sleep3r in https://github.com/nullclaw/nullclaw/pull/38
• feat: add Windows platform support by @DonPrus in https://github.com/nullclaw/nullclaw/pull/37
• Refactor/codebase cleanup by @DonPrus in https://github.com/nullclaw/nullclaw/pull/40
• feat: integrate SecurityPolicy into runtime execution path by @DonPrus in https://github.com/nullclaw/nullclaw/pull/41

New Contributors

• @psynyde made their first contribution in https://github.com/nullclaw/nullclaw/pull/14
• @dkd-dobberkau made their first contribution in https://github.com/nullclaw/nullclaw/pull/21
• @chenrui333 made their first contribution in https://github.com/nullclaw/nullclaw/pull/32
• @sleep3r made their first contribution in https://github.com/nullclaw/nullclaw/pull/38

Full Changelog: https://github.com/nullclaw/nullclaw/compare/v2026.2.19...v2026.2.20