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COMPARISON-CODEX.md

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LegnaCode vs OpenAI Codex CLI

🌐 中文文档

LegnaCode v1.8.0 fully integrates Codex CLI capabilities while maintaining its own advantages. Features marked with [Codex] originated from the Codex fusion roadmap.

Security

Feature Codex CLI LegnaCode
Kernel-level sandbox ✅ Seatbelt + bwrap + seccomp + Landlock ✅ [Codex] Seatbelt + seccomp + container fallback
Static exec policy ✅ Starlark-like DSL ✅ [Codex] TOML rules (prefix/glob/regex)
Auto-approval agent ✅ codex-auto-review model ✅ [Codex] Guardian sub-agent (6-category risk taxonomy)
Process hardening ✅ core dump + ptrace + env sanitize ✅ [Codex] Equivalent
Shell escalation protocol ✅ sandbox/escalate/deny ✅ [Codex] sandbox/escalate/deny 3-tier
Network policy ✅ HTTP+SOCKS5 proxy, MITM HTTPS ✅ [Codex] Domain allowlist/denylist, 3 modes, audit log
Secret detection ✅ Phase-based with dedup ✅ [Codex] Regex patterns + auto-redact in memory pipeline

Memory & Context

Feature Codex CLI LegnaCode
Memory system ✅ 2-phase rollout + SQLite + watermark ✅ 4-layer stack + vector search + SQLite + knowledge graph
Cross-session search ❌ ✅ /recall command
Temporal knowledge graph ❌ ✅ Entity-relation + time-validity queries
Content tiering ❌ ✅ L0/L1/L2 budget-driven degradation
Token ROI ranking ❌ ✅ [Codex] Recall-to-cost ratio ranking
Two-pass wake-up ❌ ✅ [Codex] Greedy L1 + L0 backfill

Collaboration & Interaction

Feature Codex CLI LegnaCode
Collaboration modes ✅ default/plan/execute/pair ✅ [Codex] 4 built-in + custom .md templates
JS REPL ✅ Persistent Node kernel + codex.tool() ✅ [Codex] Public with legnacode bridge object
IDE protocol ✅ JSON-RPC 2.0 (stdio + WebSocket) ✅ [Codex] JSON-RPC 2.0 (stdio + WebSocket)
Multi-agent ✅ spawn/send/wait/close + AgentRegistry ✅ Coordinator + TeamCreate + tmux integration
Voice input ✅ WebRTC + WebSocket realtime ✅ STT (voice_stream)
Voice output (TTS) ❌ ✅ [Codex] Native backend (macOS say, Linux espeak)
WebRTC transport ✅ ✅ [Codex] Bidirectional audio transport

Models & Backends

Feature Codex CLI LegnaCode
OpenAI API ✅ ✅ Via OpenAI-compat bridge
Anthropic API ❌ ✅ Native
AWS Bedrock ✅ ✅
Ollama / LM Studio ✅ ✅ Via OpenAI-compat bridge
MiniMax multimodal ❌ ✅ 6 native tools (image/video/speech/music/vision/search)
Model adapter architecture ❌ ✅ 8 adapters (DeepSeek/GLM/Kimi/MiMo/MiniMax/Qwen/etc)
Intelligent model routing ❌ ✅ Auto-selects model tier by prompt complexity

Plugin & Skills

Feature Codex CLI LegnaCode
Plugin system ✅ .codex-plugin/plugin.json ✅ Marketplace + [Codex] Codex plugin adapter
Skills ✅ SKILL.md (YAML frontmatter) ✅ SKILL.md + [Codex] Codex format auto-discovery
MCP ✅ Client + Server ✅ Client + Server
Hooks ✅ 6 lifecycle events ✅ 6 lifecycle events
Config migration ❌ ✅ [Codex] /migrate imports from Codex/Cursor/Copilot

SDK

Feature Codex CLI LegnaCode
TypeScript SDK ✅ ✅ [Codex] @legna/legnacode-sdk with Codex alias
Python SDK ✅ ✅ [Codex] legnacode-sdk with Codex alias
Structured output ✅ ✅ [Codex] JSON Schema + Zod support

Performance & Platform

Feature Codex CLI LegnaCode
Core language Rust (70+ crates) TypeScript + [Codex] Rust NAPI addon (optional)
Native acceleration ✅ Full Rust ✅ [Codex] cosine/tfidf/hash/tokens (~10-50x with fallback)
macOS arm64 / x64 ✅ ✅
Linux x64 / arm64 ✅ ✅
Windows x64 ✅ ✅
Rollback ✅ Built-in ✅ [Codex] Timeline + dry-run + safe mode

Config Compatibility

Feature Codex CLI LegnaCode
~/.codex/config.toml ✅ Native ✅ [Codex] Auto-import as fallback settings
~/.codex/skills/ ✅ Native ✅ [Codex] Auto-discovery
Codex plugin format ✅ Native ✅ [Codex] Auto-convert to LegnaCode format
Bidirectional export ❌ ✅ [Codex] Export LegnaCode config to Codex TOML

Migration from Codex

# Auto-import Codex config, MCP servers, skills
legna migrate --agents

# Or just start — ~/.codex/config.toml is auto-detected
legna

LegnaCode automatically reads ~/.codex/config.toml, discovers ~/.codex/skills/, detects codex-plugin.json in project directories, and provides Codex alias in SDK for drop-in replacement.