Skip automatic completion actions in local_only mode

Add `local_only` flag to contracts that prevents automatic completion
actions (branch, merge, pr) from executing when tasks complete. This
allows users to manually handle code changes via patch files or other
means when operating in local-only mode.

Changes:
- Add `local_only` field to Contract model and request types
- Add database migration for the new column
- Add `local_only` parameter to SpawnTask command in both state.rs and
  daemon protocol.rs
- Modify task manager to skip completion action execution when
  `local_only` is true, with appropriate logging
- Pass `local_only` flag through all task spawning paths:
  - mesh_supervisor.rs (task spawn, retry, resume)
  - mesh.rs (task start, reassign, continue)
  - mesh_chat.rs (run task)
  - contract_chat.rs (run task)
- Update repository create/update functions to handle `local_only`

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/makima/migrations/20250127000000_add_local_only.sql b/makima/migrations/20250127000000_add_local_only.sql
new file mode 100644
index 0000000..2cd594e
--- /dev/null
+++ b/makima/migrations/20250127000000_add_local_only.sql
@@ -0,0 +1,8 @@
+-- Add local_only column to contracts table
+-- When enabled, automatic completion actions (branch, merge, pr) are skipped,
+-- allowing users to manually handle code changes via patch files or other means.
+
+ALTER TABLE contracts
+ADD COLUMN IF NOT EXISTS local_only BOOLEAN NOT NULL DEFAULT FALSE;
+
+COMMENT ON COLUMN contracts.local_only IS 'Whether to skip automatic completion actions (branch, merge, pr) for this contract';