[lukemaj]

What: Promachos mode lists and renders conversations from every machine's copy of the home, the same way the sidebar merges projects.
Why: The home named one project on one environment (promachos · cavallo), so a conversation started on bestia's promachos never appeared.
So what: Needs the developer's merge approval; after merge it gets staged on cavallo per the runbook.

Fix

• promachosHomeRefs resolves the home to every project sharing its logical key under the user's grouping settings (deriveLogicalProjectKeyFromSettings, the sidebar's own rule).
• The conversation list and the chat presentation (usePromachosChat) use that set. The home label drops the machine name when it spans more than one.
• New conversations still start on the chosen home project. A user who keeps projects separate keeps a single-machine home.

Evidence

• cavallo and bestia both have ~/dev/promachos with origin github.com/lukemaj/promachos; cavallo's grouping mode is repository, so they merge.

Proof

• vp test run src/components/promachos: 4 files, 20 tests passed, including new cross-machine and separate-mode cases.
• apps/web typecheck passed; lint clean on src/components/promachos.
• Not verified in a real client.

Elon record

Requirements and who asked: The developer: Promachos runs on any machine and all its conversations show in Promachos mode.
Deleted: A new Promachos-specific grouping setting; the sidebar's grouping already defines "same project".
Bottleneck: The home was a single ScopedProjectRef.
Checked myself: Read both machines' project records and cavallo's grouping setting; ran the tests and typecheck above.

Opus 5.5 via Claude Code in T3 Code.

🤖 Generated with Claude Code

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	5.0 KiB	5.0 KiB	0 B (0.0%)	6.8 KiB	✅
Codex	Thread snapshot wire	3.8 KiB	3.8 KiB	0 B (0.0%)	4.9 KiB	✅
Codex	Live turn WebSocket wire	1.2 KiB	1.2 KiB	0 B (0.0%)	2.0 KiB	✅
Codex	Live turn WebSocket decoded	20.9 KiB	20.9 KiB	0 B (0.0%)	29.3 KiB	✅
Codex	Live turn messages	2	2	0 (0.0%)	8	✅
Claude	Total thread wire	5.0 KiB	5.0 KiB	0 B (0.0%)	6.8 KiB	✅
Claude	Thread snapshot wire	3.8 KiB	3.8 KiB	0 B (0.0%)	4.9 KiB	✅
Claude	Live turn WebSocket wire	1.2 KiB	1.2 KiB	0 B (0.0%)	2.0 KiB	✅
Claude	Live turn WebSocket decoded	21.2 KiB	21.2 KiB	0 B (0.0%)	29.3 KiB	✅
Claude	Live turn messages	2	2	0 (0.0%)	8	✅

Baseline: 18229e6 · PR result: a56afce · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 108.5 KiB
• Claude decoded thread snapshot: 108.8 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.