Persist validated Codex extraction responses as chunk files so the shared B3 merge preserves semantic nodes and edges.
Fail before cache and graph updates when extraction responses are missing or invalid.
Add regression coverage for chunk merging, cached reruns, and failure handling.
Fixes#4311
Co-authored-by: OpenAI Codex <codex@openai.com>
(cherry picked from commit da5850f0ac)
All-platform progressive-disclosure skill split + generator (addresses #1106).
Splits each platform's skill into a lean core (~615 lines, full default pipeline inline) + on-demand references/, generated from a single source via tools/skillgen with a CI/pre-commit drift gate. 13 hosts split, aider/devin stay monoliths. Also fixes the stale bare-path bugs across the previously hand-maintained variants and moves the always-on blocks into packaged markdown.
Verified: all 5 generator guards pass, byte-verbatim load-bearing slices, lean cores self-sufficient on the default path across all 13 split hosts, references gated to non-default branches, description preserves the graphify-out-query-first clause. Supersedes #1119 (Claude-first subset).
Known follow-up applied on top: harden _always_on() against a missing packaged file so a partial install can't brick the CLI.
Vibhanshu Mishra