`write_knowledge` emits a WriteEvent file per object with no consumer gitignore

[RichardHightower]

Summary

Every successful write_knowledge creates knowledge/write-events/{unix}-{hex}.md and refreshes that catalog. A 67-object Fabric capture produced 70+ WriteEvent files. They are not in templates/gitignore-fragment (**/.index/ only). Consumer brains either commit noise or leave untracked floods.

Doctor then counts WriteEvent as a first-class type.

Repro

python3 scripts/dekc_capture.py table --name foo --layer bronze
ls knowledge/write-events/

Expected

• WriteEvents optional (DEKC_WRITE_EVENTS=0 or --no-write-event).
• Default off for bulk walk/capture, on for session isolation if desired.
• Fragment gitignore: knowledge/write-events/ except index.md, or the whole dir.
• Do not refresh a global catalog of timestamps on every table.

Code

def emit_write_event(...):
    event_id = f"{int(datetime.now(timezone.utc).timestamp())}-{secrets.token_hex(3)}"
    ev_rel = f"write-events/{event_id}.md"
    ...
    write_concept(bundle, ev_rel, fm, body, force=True)
    ensure_catalog_index(bundle, "write-events", "Write Events")

write_knowledge(..., emit_event=True) default.

templates/gitignore-fragment documents .index/ only.

---

Found on: DEKC 0.4.1 (GitHub Latest 2026-08-24), mixed PKC+SAC+DEKC second brain, Azure Fabric reverse-engineering walk.
Not a sample-knowledge issue. Repro used live capture scripts from spillwave-second-brain cache data-engineering-knowledge-capture/0.4.1/.

[RichardHightower]

Fixed in 0.4.2 via #45. WriteEvents are opt-in (DEKC_WRITE_EVENTS=1 or --write-event). templates/gitignore-fragment ignores **/write-events/* except index.md.