## What
- Retry post-merge target pushes after recognized transient Git
transport failures.
- Use a bounded schedule: the initial attempt plus two retries after 2s
and 5s.
- Apply the same helper to the unified fast path and the shared push
path used by divergence recovery and the soft-deprecated merger.
- Keep retry sleeps and subsequent attempts cancellation-aware.
- Add a patch changeset and regression coverage, including a real bare
remote that rejects the first push.
## Why
Fusion already retries non-fast-forward races, and #1942 made terminal
push failures durable, but a temporary network failure still ended
post-merge delivery after one attempt. That can leave the local
integration branch ahead of the remote even though retrying seconds
later would succeed.
The retry is deliberately provider-neutral. It uses Git error
classification and normal Fusion logs only; it does not add Telegram,
OpenClaw, or any other notification-vendor dependency.
## Behavior and impact
- Retries only transient transport signatures such as connection resets,
DNS failures, unreachable networks, selected HTTP 429/5xx RPC failures,
and unexpected disconnects.
- Permission, authentication, configuration, and ref-rejection errors
keep their existing immediate handling.
- Exhausted retries remain non-fatal to the already-landed merge and
flow through the existing audit/task-log failure reporting.
- Existing non-fast-forward pull/rebase recovery is unchanged apart from
making its backoff cancellation-aware.
## Checks
- [x] `pnpm --filter @fusion/engine exec vitest run
src/__tests__/merger-ai-push-after-merge.test.ts
src/__tests__/merger-prompt-and-utils.test.ts --silent=passed-only
--reporter=dot` (48 tests)
- [x] `pnpm --filter @fusion/engine typecheck`
- [x] `pnpm lint` (0 errors; 2 pre-existing warnings)
- [x] `pnpm check:changesets --strict`
- [x] `pnpm check:fnxc-future-dates`
- [x] `pnpm test` (changed-test gate; static checks and 688 tests
passed)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved reliability of post-merge pushes by retrying temporary Git
transport failures.
* Added bounded backoff between retries to prevent excessive repeated
attempts.
* Push retries now stop promptly when an operation is canceled.
* Configuration, authentication, and ref-rejection errors continue to
fail immediately.
* Successful retries and canceled operations now report accurate
outcomes.
* **Tests**
* Added coverage for successful retries, cancellation, and non-retryable
failures.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: flexi767 <flexi767@users.noreply.github.com>
Co-authored-by: v <v@m5.speedport.ip>
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