chore: simplify codex prompt handling

packages/coding-agent/CHANGELOG.md

@@ -10,10 +10,18 @@
 - Added `ctx.compact()` and `ctx.getContextUsage()` to extension contexts for programmatic compaction and context usage checks.
 - Added documentation for delete word forward and kill ring keybindings in interactive mode. ([#810](https://github.com/badlogic/pi-mono/pull/810) by [@Perlence](https://github.com/Perlence))
 
+### Changed
+
+- Updated the default system prompt wording to clarify the pi harness and documentation scope.
+
 ### Fixed
 
 - Fixed photon module failing to load in ESM context with "require is not defined" error ([#795](https://github.com/badlogic/pi-mono/pull/795) by [@dannote](https://github.com/dannote))
 
+### Removed
+
+- Removed `pi-internal://` path resolution from the read tool.
+
 ## [0.48.0] - 2026-01-16
 
 ### Added