draft-1: research

backlog/drafts/draft-1 - Extend-format-on-edit.ts-to-run-on-files-modified-via-Backlog-MCP-tools.md

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+---
+id: DRAFT-1
+title: Extend format-on-edit.ts to run on files modified via Backlog MCP tools
+status: Draft
+assignee: []
+created_date: '2026-05-10 06:59'
+labels:
+  - pi-extension
+  - tooling
+  - backlog
+dependencies: []
+references:
+  - .pi/extensions/format-on-edit.ts
+priority: low
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+The pi extension `.pi/extensions/format-on-edit.ts` currently formats files (Elixir via `mix format`, markdown via `prettier`) only when the `edit` or `write` tools are used. When Backlog MCP tools (`backlog_task_edit`, `backlog_document_create`, etc.) modify files under `backlog/`, no formatting is triggered.
+
+The `tool_result` event fires for the `mcp` tool with `event.input.tool` set to the Backlog tool name, so it's technically possible to hook into these calls. The main challenge is mapping MCP tool calls to the specific files that were modified.
+<!-- SECTION:DESCRIPTION:END -->