When an isolated task agent commits its own changes before yielding, the
harness used to collapse the captured delta into one AI-summarized commit
and discard the agent's commit messages and authorship entirely. This
violated commit discipline for agentic swarms — multiple logical commits
("fix bug" + "add test") became a single opaque commit, and the
agent's commit object (which lived in isolation/.git/objects under
overlayfs/rcopy) was lost when cleanupIsolation tore down the overlay.
commitToBranch now detects when isolation HEAD moved past baseline.root
.headCommit. When it has, the function git-fetches the agent's HEAD into
the parent repo as omp/task/${taskId} so the commit objects survive
cleanupIsolation, and stamps the captured baselineSha onto the returned
CommitToBranchResult. mergeTaskBranches cherry-picks the inclusive range
baseSha..branchName when baseSha is provided, replaying each agent
commit verbatim with its original message and author. Any uncommitted
leftover (staged, unstaged, untracked) on top of the agent's last commit
becomes one trailing AI-summarized commit on the same branch.
Falls back to the legacy single-commit path when the agent never moved
HEAD (purely dirty working tree); existing patch-mode flow is untouched.
Fixes#3842
roboomp
da715aae7c