jerry/buzz

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Matt Toohey 81cd8d0dfc feat(desktop): isolate agent repos dirs per workspace

Make agents immune to the shared REPOS symlink re-pointing on workspace
switches (Phase 4 of lazy multi-workspace agents, building on the Phase
1-3 relay pinning, lazy activation, and UI scoping):

- Persist repos_dir per relay URL in a new .repos-dirs.json nest dotfile
  (keys normalized like agent relay pins), written by every
  apply_workspace alongside the single-value .repos-dir that keeps
  driving the boot-time symlink resolve. The REPOS symlink itself keeps
  following the active workspace as a human/tooling convention.
- At spawn, resolve the agent's own workspace entry (keyed by its
  effective relay) to a canonical real path and hand it to the child as
  BUZZ_REPOS_DIR, so a mid-task switch that re-points REPOS can no
  longer land a workspace-A agent in workspace B's checkouts. A
  configured-but-unresolvable entry fails the spawn closed (same
  rationale as resolve_repos_at_boot); no entry falls back to the nest
  REPOS path, preserving pre-map behavior.
- Adjust the nest AGENTS.md instructions (template v5) that referenced
  REPOS/ relatively: agents are told to address checkouts through
  $BUZZ_REPOS_DIR whenever it is set.
- Hash the raw per-relay map value into the spawn-config hash so a
  repos-dir edit badges needsRestart while a pure workspace switch (and
  filesystem state alone) cannot.
- Migrate the map entry in rebind_agent_relay when a community's relay
  URL is edited, so rebound agents keep their repos-dir isolation.
- Split the grown repos.rs test module into repos/tests.rs (file-size
  guard), mirroring nest/tests.rs and spawn_hash/tests.rs.

Tested: cargo test --manifest-path desktop/src-tauri/Cargo.toml (1433
passed, incl. 7 new repos-map/resolution tests and 2 new spawn-hash
tests), clippy --all-targets -D warnings, rustfmt --check, cargo check
--features mesh-llm.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: Matt Toohey <contact@matttoohey.com>

2026-07-17 21:06:50 -04:00