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Diego ImbertandClaude Opus 5
0efddb94cf
Three from the round, all about deciding on state that could already have moved. A permission save resolved the data table and checked it was instance-backed before taking any lock, then wrote under one. A config save committing in between could move the table onto a PostgreSQL resource — recreating exactly what the transition guard refuses — or rename it, in which case the write targeted a key that no longer existed and reported success having changed nothing. It now re-resolves and re-checks on the locked state. Rename validation checked that the source existed before and the target existed after, which still accepts `main -> decoy` against a save that keeps both: every fork of `main` then follows onto a different data table, silently, because it keeps resolving. The rule is now the actual old-to-new key transition — a source may only survive if another rename took its name, and a target may only pre-exist if another rename freed it. That also stops two sources sharing one target, and it admits a swap, which the previous guard refused: `datatables` is keyed by name, so a swap cannot be done one save at a time, and refusing it was a regression against main. The pointer cascade now runs in two passes through a temporary name, the way the migration cascade one layer down already handles the same shape, so `A -> B` with `B -> C` moves each pointer once from what it named before the save. The tenant mutators say what they are for: they write an access decision for any workspace named, with an arbitrary mutation, and exist for the transaction that frees or renames a principal. Editing a decision on purpose belongs in the permissions endpoint. Carried in the same change: the stranded-fork list is a field rather than a phrase to grep out of a success string; the pointer cascade matches with `EXISTS` instead of a `LIKE` over the whole document, so a workspace whose pointers name something else is not rewritten to a byte-identical value under an exclusive lock; and `InstanceDatatableRole` drops the serde derives left over from the JSON document, one of which would emit `pwd`. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012ti5HyeTikPMYyW8YSdiHR