### Added
- Added `gemini-3.1-pro-preview-customtools` model availability for the `google-vertex` provider ([#2610](https://github.com/badlogic/pi-mono/pull/2610) by [@gordonhwc](https://github.com/gordonhwc))
### Fixed
- Documented `tool_call` input mutation as supported extension API behavior, clarified that post-mutation inputs are not re-validated, and added regression coverage for executing mutated tool arguments ([#2611](https://github.com/badlogic/pi-mono/issues/2611))
- Fixed repeated compactions dropping messages that were kept by an earlier compaction by re-summarizing from the previous kept boundary and recalculating `tokensBefore` from the rebuilt session context ([#2608](https://github.com/badlogic/pi-mono/issues/2608))
- Fixed interactive compaction UI updates so `ctx.compact()` rebuilds the chat through unified compaction events, manual compaction no longer duplicates the summary block, and the `trigger-compact` example only fires when context usage crosses its threshold ([#2617](https://github.com/badlogic/pi-mono/issues/2617))
- Fixed interactive compaction completion to append a synthetic compaction summary after rebuilding the chat so the latest compaction remains visible at the bottom
- Fixed skill discovery to stop recursing once a directory contains `SKILL.md`, and to ignore root `*.md` files in `.agents/skills` while keeping root markdown skill files supported in `~/.pi/agent/skills`, `.pi/skills`, and package `skills/` directories ([#2603](https://github.com/badlogic/pi-mono/issues/2603))
- Fixed edit tool diff rendering for multi-edit operations with large unchanged gaps so distant edits collapse intermediate context instead of dumping the full unchanged middle block
- Fixed edit tool error rendering to avoid repeating the same exact-match failure in both the preview and result blocks
- Fixed auto-compaction overflow recovery for Ollama models when the backend returns explicit `prompt too long; exceeded max context length ...` errors instead of silently truncating input ([#2626](https://github.com/badlogic/pi-mono/issues/2626))
- Fixed built-in tool overrides that reuse built-in parameter schemas to still honor custom `renderCall` and `renderResult` renderers in the interactive TUI, restoring the `minimal-mode` example ([#2595](https://github.com/badlogic/pi-mono/issues/2595))