fix(a2a_fleet): dashboard dedup managed peers by (repo, mode) not repo (#95)

[Interstellar-code]

Root cause (#95)

dashboard/plugin_api.py::_managed_repos() deduped managed peers by repo_path alone (key = str(repo)). A repo running more than one mode — e.g. a claude_code + codex peer in the same repo — had every mode after the first silently dropped from the conversations/peers feed, and therefore from the Matrix3D A2A page. The docstring claimed "covers all 4 modes … deduped by repo_path", contradicting itself.

Fix

One-line key change: key = (repo_str, mode). Each mode in a repo now surfaces as its own peer. Docstring corrected.

Tests

• test_managed_repos_keeps_multiple_modes_in_one_repo — cc + codex in one repo → both appear.
• test_managed_repos_dedupes_same_repo_AND_mode_across_profiles — same (repo, mode) across two profiles still collapses to one row (same-mode dedup intact).
• Falsification-verified: reverting the key to repo-only fails exactly the new multi-mode test.
• Full suite: 380 passed.

Scope notes

• No front-end change — switchui [karpathy-self-improve] Coordinate per-profile target resolution with #143 persona/identity layout #183 is correct and was never the cause. Restart the dashboard service to load the fix; codex then shows in Matrix3D immediately.
• opencode/agy still need their own fleet.yaml entries to appear — they were genuinely unconfigured, not dedup casualties.

a2a_fleet → v0.8.6.

Closes #95.

🤖 Generated with Claude Code

[github-actions]

🔎 Lint report: fix/a2a-dashboard-dedup-by-repo-mode vs origin/main

ruff

Total: 0 on HEAD, 0 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 0 pre-existing issues carried over.

ty (type checker)

Total: 10175 on HEAD, 10175 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 5497 pre-existing issues carried over.

Diagnostics are surfaced as warnings — this check never fails the build.