Remove SystemMessage.replace. A prompt forced from before_agent_start is a rendering
of the current prompt for the run, not conversation state: persisting it as a
replacing system message wrote the full prompt and tool list on every change,
lost the structured sections while forced, and disabled mid-conversation system
messages for the rest of the session once a replacement existed.
The transcript now always records section patches. AgentSession wraps
transformContext and, when a forced prompt is active, collapses the system
messages into one head carrying the forced text and the current tools. Providers
receive the same request as before; nothing is persisted and the projection ends
with the run.
The evals harness validated the without_docs variant from the transcript, which
relied on the persisted replacement. Its transform extension now records the
prompt it forced and validates that instead.
Add SystemMessage.replace: replaying a system message with the flag discards the
accumulated prompt content, sections, and tools before applying it, and providers
collapse the transcript into one leading system message whenever a later message
replaces it.
A forced prompt from before_agent_start is opaque, so it is persisted as a replace
message holding the text in content with no sections (the agent loop fills in the
full tool set). Leaving force mode persists another replace message with the
structured sections. Previously the forced prompt became a preamble section patch,
so models with native mid-conversation system messages kept the original prompt
as their leading system prompt and received the forced one as a later update.
Extract Google catalog processing and apply models.dev reasoning effort
metadata directly for Google, Vertex, and OpenCode models. Keep the
provider-specific Gemma 4 toggle mapping.
This change makes system prompt text and tool changes part of the transcript rather than silently rewriting its starting conditions. This lets Pi record when instructions changed or tools became available, restore that state after resuming or navigating branches, and preserve cached prompt prefixes where the upstream supports it.
Send x-session-id for OpenRouter Chat Completions and Anthropic Messages requests while preserving explicit opt-out and cache-disabled behavior.
closes#9102
Update the catalog-wide assertion for metadata-driven Fireworks support while retaining the model-name restrictions for other providers. Add representative Fireworks models to the expected subset.
Enable unsigned thinking replay and metadata-driven adaptive effort for Fireworks Messages models, with verified fallbacks for incomplete catalog metadata. Remove redundant GLM 5.2 and Kimi K3 effort aliases and add regression tests.
closes#9323
Map sessionId to x-opencode-session across OpenCode and OpenCode Go provider adapters, including requests with cache retention disabled. Preserve explicit caller header overrides.
Closes#9326
Add grok-build-0.1 to XAI_BUILTIN_EXCLUDED_MODEL_IDS so the generated xAI
catalog only lists grok-4.3, grok-4.5 and grok-4.6. Update the exclusion
test and drop the thinking-level assertion for the removed model.
Co-authored-by: Jaaneek <Jaaneek@users.noreply.github.com>
