[abruption]

Codex sessions in Orca/custom homes were absent from default listing unless callers already knew the home path. Default list now queries bounded default, CODEX_HOME, Orca and configured candidates on the destination and adds codexHome/stateDb to every Codex row. Explicit --codex-home remains single-home, including MCP destinations.

Closes #79. Stacked on #78, which is still open. Merge order: #76 → #77 → #78 → this PR; retarget this PR to main after #78 merges.

• Preserve the same UUID in different homes; deduplicate canonical home aliases and sort Codex rows deterministically.
• Expose discovery.codex.homes and inventory errors, retaining successful Codex/Claude results on partial failures. Explicit/environment/configured missing homes fail; absent optional candidates do not.
• Automatic discovery with no Codex installation now returns not_installed and exit 0. Errors still return exit 1. The legacy top-level codexHome remains only for a single candidate without inventory errors; consumers should use row-level paths.
• Preserve strict send/wake ambiguity handling and MCP's explicitly pinned home boundary. Update CLI help, README, JSON documentation and skill guidance.

Validation: 290 tests pass with MCP dependencies; standalone suite passes with two optional protocol tests skipped. New fixtures cover all candidate sources, duplicate UUIDs, aliases, explicit selection, missing/corrupt/unsupported DBs, invalid timestamps/configuration, enumeration/read/resolve failures, archived filtering, SSH source execution with destination environment, multi-host metadata and MCP isolation. Wheel/sdist build and diff checks pass.

Read-only live checks: local default home returns 19 sessions; SSH macbook returns 164 across default + two Orca homes. Explicit remote home returns only 25 sessions from that home. Adding a nonexistent local configured home preserves 19 valid rows and reports the missing home with exit 1. No messages sent, queue/state DB writes, runtime activation or release performed.