Preserve Claude native context management

[ItayCohen-Prog]

What changed

• applies Claude Code's native context_management tool-result and thinking edits at the Codex protocol boundary without changing saved transcripts
• returns native Prompt is too long errors for JSON and SSE so Claude Code can run its own compaction recovery
• replaces the custom claude-api payload rewrite with Claude Code's native skillOverrides setting
• documents the native-first architecture contract and ships v1.1.1

Root cause

gptCode discarded Claude's context-management field and classified streaming context overflow as a generic API failure. A mis-selected bundled provider skill could then consume the GPT context without Claude's normal cleanup and recovery path.

Validation

• npm run check: 100/100 tests, package verification, isolated install smoke
• live gptcode doctor: Claude 2.1.211, Codex CLI 0.144.4, Codex OAuth accepted, 270k native auto-compact window
• live OAuth-backed gptcode -p response
• fresh-context audit, including media-aware token clearing and streaming sentinel regression tests
• changed-file secret-pattern scan returned no matches