fix(coding-agent): prevent duplicate session headers when forking from pre-assistant entry

createBranchedSession() wrote the file and set flushed=true even when the
branched path had no assistant message. The next _persist() call saw no
assistant, reset flushed=false, and the subsequent flush appended all
in-memory entries to the already-populated file, duplicating the header
and entries.

Fix: defer file creation when the branched path has no assistant message,
matching the newSession() contract. _persist() creates the file on the
first assistant response.

closes #1672
This commit is contained in:
Mario Zechner 2026-02-27 22:18:26 +01:00
parent 9825c13f5f
commit 2f64df1e52
3 changed files with 90 additions and 7 deletions

View file

@ -9,6 +9,7 @@
### Fixed
- `pi.registerProvider()` now takes effect immediately when called after the initial extension load phase (e.g. from a command handler). Previously the registration sat in a pending queue that was never flushed until the next `/reload` ([#1669](https://github.com/badlogic/pi-mono/pull/1669) by [@aliou](https://github.com/aliou)).
- Fixed duplicate session headers when forking from a point before any assistant message. `createBranchedSession` now defers file creation to `_persist()` when the branched path has no assistant message, matching the `newSession()` contract ([#1672](https://github.com/badlogic/pi-mono/pull/1672) by [@w-winter](https://github.com/w-winter)).
## [0.55.1] - 2026-02-26