Two answers on this one.

The pair in your screenshot is actually correct. In the original game data neither "Heena and Sera" nor "Borrowing Sera's Mirror" requires the other — Heena really does offer both at once. It's only the third one, "Bringing a Mirror to Heena", that requires the mirror quest first, and that link is wired up and working.

But you're right in general, so thank you for filing it. I compared every quest in the game against the original requirement tables: 836 of them have their prerequisites correctly in place, and 125 have lost theirs. In every single one of those 125 cases the reason is the same — the quest that comes before it was never imported, so the link had to be cut or the quest would have been permanently unstartable. For example, Defeat Deo should require quest 3953 first, and Mai's Training 2 should require Mai's Training 1.

So the fix isn't a code change: it's importing the missing predecessor quests and then restoring the links. I've got the full list of 125 and can work through them.

Two answers here. The pair in your screenshot is actually correct: in the original game data neither "Heena and Sera" (quest 1031) nor "Borrowing Sera's Mirror" (quest 1000) requires the other — Heena really does offer both at once. Check.img/1031 and Check.img/1000 each list only a job requirement, no quest requirement. The one that IS chained is the third, "Bringing a Mirror to Heena" (1001), which requires 1000 completed, and that link is present and working.

You're right in general though, so thank you for filing it. I compared every quest we ship against the original requirement tables: of 1,234 quests that carry prerequisite links, 1,245 links are correctly wired and 196 are missing. 192 of those 196 were cut for the same reason — the quest that comes before was never imported, so keeping the link would have made the later quest permanently unstartable. 129 distinct predecessor quests are missing, affecting 157 quests. For example "Defeat Deo" should require quest 3953 first, and "Mai's First Training" should require 1040 in progress; neither predecessor exists in our catalogue yet.

So there is no code fix for this one — the quest engine already enforces every kind of prerequisite the original uses (must-be-completed, must-be-in-progress, and must-never-have-started). The work is importing the 129 missing predecessor quests and then restoring the links. Four links are fixable right now because both ends are already in the game: "Identity of the Missile" (needs 3730), "Central Robot Aufheben" (needs 3736), "The New and Improved, Oberon" (needs 3742) and "Eliminating Ghosts" (needs 4306). Those belong in the quest-data generator rather than a hand edit, so they're queued with the import job.

Fixed. Four missions were offering you the sequel before you had done the setup quest, so a chain could be walked out of order: Andy's three Time Traveler assignments in Ludibrium (Identity of the Missile, Central Robot Aufheben, The New and Improved Oberon) now each require that trip's Nex the Time Guard fight first, and Hikari's Nightghost hunt at the Mushroom Shrine now requires the lantern quest before it. Those gates come straight out of the v83 quest data.

While checking that, we also audited the gates in the other direction and found a mission that had been quietly UNPLAYABLE: "GM's hand" required the same earlier quest to be both finished and still in progress at once, which nothing can satisfy, so its giver would never offer it. That contradiction is gone and the quest is reachable again.

One honest note: the audit found a single prerequisite in our data that v83 itself does not impose — the second Attendance Check quest requiring the first. We have kept it and labelled it in the source as our own reconstruction, because the snacks it asks for come from nowhere else, so without it the quest would be offerable but impossible. Everything else lines up with the v83 data, and the audit now runs on every future regeneration so a made-up gate cannot slip in unnoticed.