docs(coding-agent): add cross-package changelog entries

- OpenAI Codex model aliases removed (breaking, from @ghoulr #536)
- OpenAI Codex context window fix (from @ghoulr #536)
- SSH input batching fix (#538)

packages/coding-agent/CHANGELOG.md

@@ -10,6 +10,7 @@
 - `ExtensionRunner` constructor now requires `runtime: ExtensionRuntime` as second parameter
 - `ExtensionRunner.initialize()` signature changed from options object to positional params `(actions, contextActions, commandContextActions?, uiContext?)`
 - `ExtensionRunner.getHasUI()` renamed to `hasUI()`
+- OpenAI Codex model aliases removed (`gpt-5`, `gpt-5-mini`, `gpt-5-nano`, `codex-mini-latest`). Use canonical IDs: `gpt-5.1`, `gpt-5.1-codex-mini`, `gpt-5.2`, `gpt-5.2-codex`. ([#536](https://github.com/badlogic/pi-mono/pull/536) by [@ghoulr](https://github.com/ghoulr))
 
 ### Added
 
@@ -24,6 +25,8 @@
 - Default thinking level from settings now applies correctly when `enabledModels` is configured ([#540](https://github.com/badlogic/pi-mono/pull/540) by [@ferologics](https://github.com/ferologics))
 - External edits to `settings.json` while pi is running are now preserved when pi saves settings ([#527](https://github.com/badlogic/pi-mono/pull/527) by [@ferologics](https://github.com/ferologics))
 - Overflow-based compaction now skips if error came from a different model or was already handled by a previous compaction ([#535](https://github.com/badlogic/pi-mono/pull/535) by [@mitsuhiko](https://github.com/mitsuhiko))
+- OpenAI Codex context window reduced from 400k to 272k tokens to match Codex CLI defaults and prevent 400 errors ([#536](https://github.com/badlogic/pi-mono/pull/536) by [@ghoulr](https://github.com/ghoulr))
+- Key presses no longer dropped when input is batched over SSH ([#538](https://github.com/badlogic/pi-mono/issues/538))
 
 ## [0.37.8] - 2026-01-07