# pi-toolchain: v0.8.0

release · 2026-06-19 · #pi-toolchain · v0.8.0

### Minor Changes

- 0aca4d0: Rewrite: tool_call-based command mutation, new config surface, removed bash integration

  **Breaking config changes (migrations provided):**

  - `FeatureMode` `"rewrite"` renamed to `"mutate"`
  - `features.enforcePackageManager` renamed to `features.packageManager`
  - `features.rewritePython` renamed to `features.python`
  - `ui.showRewriteNotifications` renamed to `ui.showMutationNotifications`
  - `bash.sourceMode` and `BashSourceMode` removed entirely
  - Config migrations automatically handle all renames and strip stale keys

  **New features:**

  - Command mutation via `tool_call` hook — `event.input.command` is mutated in place before shell execution, replacing the spawn-hook/bash-integration approach
  - All three behaviors (block, mutate, notify) handled by a single `tool_call` handler
  - Execution order: blockers first, then mutation, then notifications

  **Removed:**

  - `bash-integration.ts` and `bash-composition.ts` deleted
  - `createBashTool` / `BashSpawnContext` / spawn hook registration removed
  - `override-bash` and `composed-bash` source modes removed
  - Mutation notifications no longer have `[override-bash]`/`[composed-bash]` prefix

  **Architecture:**

  - `src/` — pure functions, zero Pi runtime imports
  - `extensions/toolchain/` — Pi extension entry point, hooks, settings UI
  - 40 tests covering config defaults, migrations, feature predicates, tool_call hook, and pure mutation engine

- [GitHub release](https://github.com/aliou/pi-toolchain/releases/tag/v0.8.0)
- [npm](https://www.npmjs.com/package/@aliou/pi-toolchain/v/0.8.0)