This is the key finding — and it's good news. Embeddings are populated and working well. That semantic query pulled the decision doc, the relevant Slack threads, and the related Granola meetings all ranked together (0.88 → 0.47). So the gap-filling you asked about does work at retrieval time — when I answer a question, I pull across Slack + meetings semantically, which is exactly the "fill missing-meeting gaps from Slack" behavior. The "4469 orphans" is about stored wikilinks between pages, which is a different (and cosmetic, for our use) thing. The brain isn't failing to connect context; it just isn't pre-writing link graphs into the markdown. Given that, here's my recommendation rather than blindly flipping synthesize on: What I fixed (done, verified): • Slack archiver commit/sync PATH bug → Slack now reliably lands in the brain nightly. Confirmed working under a launchd-equivalent environment. What I'd NOT change right now: • The orphan/link-graph "problem" is mostly noise given embeddings work. Turning on

synthesize

requires pointing

session_corpus_dir

at a corpus and would start auto-generating derived pages — that changes brain behavior and adds noise/cost. I don't think it's worth it purely to reduce an orphan count when retrieval already spans sources correctly. Optional next step if you want tighter gap-filling: I could add a small nightly "meeting-gap" synthesis — for any calendar meeting with no Granola note, auto-write a short page stitched from that day's relevant Slack. That's targeted and useful, versus turning on the generic synthesize phase wholesale. The meeting-pinger already detects un-recorded meetings, so I'd hook into that. Want me to build the targeted meeting-gap synthesis, or leave it and just keep the archiver fix? Either way I'll log this to the brain so it's on record.