dsh-lcx-codex v0.4.2-pre.1

0.4.2-pre.1 is the verified prerelease for the new full GPT Responses lifecycle ownership path.

Highlights

• Full GPT Responses lifecycle ownership: with LCX ON, LCX owns the final Responses wire from the first ordinary turn through tool loops, Native V2 compaction/replay, restart/resume, and portable GPT model switching. LCX OFF keeps the native DSH path unchanged.
• Pi 0.84.3 compatibility: the plugin uses isolated @earendil-works/pi-ai 0.84.3 while DSH 0.1.1-rc.2 keeps host Pi 0.82.1 unchanged.
• GPT-5.6 prompt cache modernization: implicit caching uses prompt_cache_options.ttl=30m with a stable prompt-cache identity. Real RC workloads observed substantial cache reuse.
• Reasoning pass-through: GPT-5.6 reasoning.effort=max is preserved through the LCX-owned Responses path.
• Native V2 hardening: repeated compact/replay no longer retains duplicate canonical developer/system preludes; retained assistant phase semantics are preserved.
• Search/Alpha hardening: HTTP-200 provider command failures are classified as tool errors instead of false successful continuation evidence.

Verified stack

• dsh-lcx-codex 0.4.2-pre.1
• DSH 0.1.1-rc.2
• DSH host Pi 0.82.1
• plugin Pi 0.84.3

Install / upgrade

dsh plugin --profile web add dsh-lcx-codex@0.4.2-pre.1
dsh web

npm dist-tags: prelatest=0.4.2-pre.1; stable latest=0.4.1 remains unchanged.

Current boundaries

• Explicit prompt-cache breakpoint placement is not exposed by the current DSH/Pi host vocabulary.
• reasoning.context and reasoning.mode remain host/Pi exposure boundaries.
• Credentialed ALPHA-004 runtime coverage remains NOT_COVERED; fail-closed behavior is covered by tests.

This is a prerelease. Stable promotion to 0.4.2 is a separate release decision.