Matt Ezell
7965462d6c
fix(compression): choose summary role by template-visible alternation
...
The compaction summary's role was selected against the LITERAL
neighbouring messages (compressed[-1] / tail_messages[0]). Mistral-family
chat templates (Devstral, Mistral Small 3.x, Magistral) enforce
user/assistant alternation but exempt the tool flow (tool results and
assistant messages carrying tool_calls) from the check, so a protected
head ending [user, assistant(tool_calls), tool] pinned the summary to
role="user" while the last role the template counts is "user": the
backend rejects the whole request with a Jinja alternation error
(HTTP 500). The summary persists in the stored conversation, every
retry replays the identical poisoned history, and the session is
permanently unrecoverable. Fires on EVERY compaction against a
Mistral-strict backend, captured byte-exact via a tee-proxy in front of
a llama.cpp/llama-swap Devstral deployment.
Fix: compute both neighbour roles through _template_visible_role(),
which skips template-exempt messages. The #52160 (Anthropic user-first)
and #58753 (zero-user-turn) forced-user guards are preserved; their
forced shapes (summary-user followed only by exempt messages) are
alternation-safe. When the visible head ends "assistant" and the
visible tail opens "user", no standalone role can alternate and the
existing merge-into-tail fallback now correctly fires (the literal
logic emitted a standalone user summary there: a second poisoning
shape).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com >
Claude-Session: https://claude.ai/code/session_01LGN45sMMbwM8cW9T9ga4ou
2026-07-30 21:07:36 +05:30
..
2026-07-29 15:28:15 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 18:55:10 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-04 15:44:50 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 13:10:23 -07:00
2026-07-15 07:47:18 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-27 21:10:51 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-22 12:02:40 -05:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-22 08:11:40 -07:00
2026-07-29 13:10:23 -07:00
2026-07-23 08:19:14 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-22 08:13:41 -07:00
2026-07-29 13:39:40 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:12:28 -07:00
2026-07-29 13:10:23 -07:00
2026-07-23 19:44:35 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 21:30:53 -07:00
2026-07-29 18:55:10 -07:00
2026-07-17 13:08:46 -04:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-12 03:00:53 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 11:54:18 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-19 14:58:59 +05:30
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 21:30:53 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 12:29:39 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-04 20:59:02 +05:30
2026-07-23 16:17:27 -07:00
2026-07-29 13:10:23 -07:00
2026-07-23 18:40:09 -07:00
2026-07-29 13:10:23 -07:00
2026-07-23 18:40:09 -07:00
2026-07-29 13:10:23 -07:00
2026-07-23 16:17:27 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:12:28 -07:00
2026-07-29 15:12:28 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 19:48:37 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-09 21:10:07 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 07:47:06 +10:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:12:28 -07:00
2026-07-29 19:48:37 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-10 05:41:59 -05:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-21 12:11:31 +05:30
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-22 10:00:39 +05:30
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 10:14:11 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-30 21:07:36 +05:30
2026-07-28 03:54:16 -05:00
2026-07-29 13:10:23 -07:00
2026-07-24 16:01:38 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 15:37:24 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-20 13:04:12 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-16 04:23:12 -07:00
2026-07-29 19:48:37 -07:00
2026-07-24 15:55:08 -07:00
2026-07-29 13:10:23 -07:00
2026-07-20 11:42:29 -04:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 13:10:23 -07:00
2026-07-29 18:55:10 -07:00