app/worker/migrations/0007_repo_shard_origin.sql

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Ladder Summary

file The migration adds a nullable `shard_of_slug` TEXT column to the **repos** table, which serves as a foreign‑key pointer to the slug of the repository that the current repo was forked from (i.e., its immediate parent shard). It also creates an index **idx_repos_shard_of** on that column to speed up look‑ups. No functions or classes are exported from this file.

-- A shard repo is a scoped workspace for one task, created by forking

-- (ArtifactsRepo.fork) its parent repo -- which may itself already be

-- a shard, forming a chain back to the true origin. This column is

-- the immediate-parent pointer (mirroring Lane.origin's "parent, not

-- root" semantics at the repo level): nullable since most repos are

-- not shards at all.

ALTER TABLE repos ADD COLUMN shard_of_slug TEXT NULL REFERENCES repos(slug);

CREATE INDEX idx_repos_shard_of ON repos(shard_of_slug);