Files
hermes-agent/agent
Teknium 3b9cf56aff fix(agent): exclude reasoning_details envelope from tail-budget walk (#73298)
Companion to the preflight fix: _estimate_msg_budget_tokens charged
reasoning_details at chars/4 via _REPLAY_BUDGET_KEYS, so the signed/base64
envelope (measured 72% of the reasoning mass on Anthropic-wire sessions)
consumed the tail budget and _find_tail_cut_by_tokens summarized away real
transcript to make room for tokens that are never sent (69 messages on the
measured session; up to ~4.8x budget inflation on thinking-heavy histories).

Per the #51800 counter-argument, actual thinking TEXT stays visible to the
budget: _reasoning_details_text_chars counts thinking/text/summary fields
and skips signature/data/encrypted blobs, and the text is skipped entirely
when reasoning/reasoning_content already carries the identical prose (so it
is charged once, not twice). codex_reasoning_items remains fully charged —
Codex Responses genuinely replays it every request (#55572).

Sabotage-verified: restoring reasoning_details to _REPLAY_BUDGET_KEYS fails
the new envelope and double-charge tests.
2026-07-31 23:16:58 -07:00
..