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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Framework: an exact selector for a fixed-seed unit (Rerun lines are coarse -t filters today)","articleBody":"Follow-up from #58 (Windows CI). A failing fixed-seed unit prints a `Rerun` command that is a coarse `-t` filter: a sibling test whose name matches the same anchored pattern also runs. Example: a unit named `fixture Q\"1 replay` and a sibling `fixture Q21 replay` share a filter that a regular-expression wildcard in the name can match.\n\nThe framework has no selector for a fixed-seed unit. `ORACLE_UNIT` is read only for a random unit during a path replay (`oracle-property.ts` `assertReplayUnit`, `oracle-environment.ts`), so a fixed unit cannot be selected exactly by an environment variable.\n\nProposed: a framework selector for a fixed-seed unit (for example `ORACLE_FIXED_UNIT`, read the same way as `ORACLE_UNIT`), with a Rerun line that uses it, and an oracle RED/GREEN for it (framework changes are oracle-first, P9). Acceptance: a Rerun line for `Q\"1` runs that unit only, and not `Q21`.\n\nRecorded as a Limit on #58 until this lands.\n","author":{"url":"https://github.com/KyleAMathews","@type":"Person","name":"KyleAMathews"},"datePublished":"2026-11-14T07:07:13Z","url":"https://github.com/TanStack/oracles/issues/78"}