* fix(sidebar): keep created subtasks during hydration
* fix(sidebar): preserve placeholder subtasks during hydration
* fix(sidebar): mark websocket placeholder snapshots
* perf(backend): cap cumulative diff bytes and file count during large rebases
* perf(web): coalesce cumulative-diff refetches and skip redundant status compares
* feat(web): warn when the changes panel hides files from a capped diff
* fix(backend): enforce cumulative diff total byte budget strictly
* fix(web): keep coalesced refetch timer shared across envKey subscribers
* fix(web): drop unsound git-status SHA fast-path that staled live diffs
* fix(web): cancel coalesced timer on mid-flight drain to avoid duplicate refetch
* refactor(web): move changes-panel banner and helper to a sibling file
* docs(backend): clarify cumulative diff truncated-files-count semantics
* fix(web): tighten useSelectedFileKey mode param to the all|file union
* perf(kanban): memoize derived board data to stop re-render storms
The board rebuilt the `tasks` array (and `stepOptions`/`sharedProps`) on every
store change, producing fresh object identities that defeated downstream memos
and re-rendered every card on each WebSocket message. Wrap them in useMemo so
the board only re-renders when its inputs actually change.
* perf(session-runtime): bound runtime memory and dedupe git-status compare
Three runtime-store fixes for the crash a heavy rebase triggered:
- Cap shell + terminal output buffers at 2MB (matching the existing process
buffer) so a chatty shell can't grow the store without limit.
- Purge per-session runtime state (messages, turns, shell/process buffers, and
the bySessionId maps) when a session is removed; env-scoped maps are dropped
only once no other session shares the environment.
- Run setGitStatus's deep per-file diff comparison once per update and return
whether anything changed, instead of recomputing it 2-3x. Under a massive
rebase (thousands of files, frequent updates) that comparison was the
dominant CPU cost and drove the render storm.
* refactor(session-runtime): drop now-unused gitStatusWouldMutate
The git-status handler no longer pre-checks for changes (setGitStatus now
returns whether it changed), leaving gitStatusWouldMutate with no callers.
* fix(session-runtime): enforce terminal cap on first and oversized chunks
appendTerminalChunk only evicted when more than one chunk was buffered, so a
single chunk larger than the 2MB cap slipped through untrimmed; the new-terminal
branch also pushed the first chunk without going through the cap at all. Clamp
each chunk to the tail of the cap and route the new-terminal path through
appendTerminalChunk. Addresses CodeRabbit review.
* fix: scope multi-repo file editor open/save to the right repo
The editor open/save/sync/delete chain dropped the repository_name in
multi-repo task workspaces, so the backend resolved paths against the
bare task root and failed with "file not found". Thread the repo
subpath through openFile, save, sync, and delete, and store it on
FileEditorState.
* fix: pass repo from diff Edit button to multi-repo file editor
The diff/changes "Edit" button opened files without their repository
scope, so multi-repo files resolved against the bare task root and
failed with "file not found". Thread repository_name through the diff
and review toolbars into onOpenFile.
* fix: preserve repo across tab restore and stale syncs
Address review feedback: persisted file tabs dropped the repo subpath,
so a multi-repo file reopened against the bare task root after a browser
refresh. Persist and restore `repo` on StoredFileTab. Also guard the
workspace sync against a tab being swapped to a different repo mid-fetch,
and widen the remaining onOpenFile type declarations to carry repo.
* fix: thread repo into editor panel fallback fetch
Address review feedback: FileEditorPanel's useFileLoader fallback fetch
(triggered when the open-files map is transiently empty, e.g. after a
session switch) called requestFileContent without the repo subpath,
re-introducing the multi-repo "file not found" failure. Record repo on
the panel params and forward it through useFileLoader. Also assert the
full restored-tab shape in the local-storage round-trip test.
* fix: guard editor fetches against stale session/repo races
Address review feedback: file open and the panel fallback fetch could
apply a late response after the user navigated away. openFile now drops
the result if the active session changed mid-fetch (via fetchFileEditorState),
and the panel loader keys its in-flight guard by session+path+repo so a
changed target re-fetches and stale responses are discarded.
José Almeida