Fleet telemetry (14d, v0.21.5) shows the builtin store returning
success=False on 34-47% of add/replace/remove calls. Live `hermes chat -q`
runs against origin/main reproduced the dominant causes:
- Drift guard refused every replace/remove/batch on a file whose only
difference from the tool's own layout was whitespace (blank lines
around the delimiter, an empty entry). Parsing only strips whitespace,
so flushing such a file loses nothing; the round-trip signal could not
protect any content and turned the store read-only until hand-fixed
(#107270). The guard now fires only on the signal that can actually
lose foreign text: one entry larger than the whole store's limit.
- An over-budget add/replace/batch said "would exceed the limit" but not
by how much, so models retried with consolidations that were still too
big. Every over-budget message now states the exact chars to free and
points at the one-batch fix.
- An old_text that matched nothing (paraphrased, stale after a concurrent
write, or several entries glued with the delimiter) returned no hint on
the batch path. Zero-match errors now carry `closest_entries` (top word
overlap) on both paths, and flag a delimiter-spanning old_text.
- A batch replace missing its own `content` now says to set it on the
operation object.
Fixes#107270. Same diagnosis as #107278 (@KoNit-K) and #61612 (@webtecnica),
which normalized the round-trip comparison instead of dropping it.
8079fd01f4