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DottaandClaude Opus 5.5
8cefbe9977
## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work
> - The restart chaos harness (`tests/restart-chaos/`) injects faults
into a real server with Daytona sandboxes and grades each task.
> - The first version of CR4 (#20966) stopped the replacement's Daytona
plugin worker while the server was still activating it. That found a
product gap: an `initialize` timeout marked the plugin `error` for the
life of the process.
> - #20966 moved CR4 to after activation. That fault is still a
separate, real failure, so it needs its own cell.
> - This pull request adds CR6: a K1 restart, then the replacement's
plugin worker is stopped as soon as it forks, during activation at boot.
> - The benefit is that #20982's activation-timeout retry is checked by
a wave, before and after the fix.
## Linked Issues or Issue Description
Refs #20966, #20982
**What happened?**
No chaos cell stalls a plugin worker during its activation at boot. In
wave `w-20261111T232850-s9521`, CR4 hit that case by accident. The
plugin stayed `error`, and every Daytona run on that server failed,
Retry included.
**Expected behavior**
The harness can stall the plugin during activation after a restart, and
it grades the task like the other class R cells.
**Steps to reproduce**
1. Run a wave with `--faults CR6`. Before this change, the harness
rejects it.
**Paperclip version or commit**
master at dfd2a6efca. This branch is stacked on #20966. Its first three
commits are #20966's, and they leave this diff when #20966 merges.
## What Changed
- `CR6`: a K1 restart (SIGKILL, no hold). The replacement's Daytona
plugin worker is stopped for the `--cr3-stall-seconds` stall as soon as
it forks. It is found within 60 s, while the server activates the
plugin.
- `withReplacementPluginStall` in `class-r.ts` runs the CR4 stall (after
activation) and the CR6 stall (at fork) beside the replacement's health
wait. `supervisor.ts` stays at 1,000 lines.
- CR6 joins the plugin-stall faults: the stall option,
`class_r_fault_applied` and the README table.
## Verification
- `npx vitest run --config tests/restart-chaos/vitest.config.ts` passes
(53 files, 636 tests). The new tests check that CR6 stops the worker
without waiting for activation, that CR4 waits for activation and fails
closed when it never comes, and that other faults leave the plugin
alone.
- `tsc --noEmit -p tests/restart-chaos/tsconfig.json` passes.
- Before/after waves on CR6: the results are in a comment.
## Risks
- Harness only. There is no product code change.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, through Claude Code
with tool use (shell, file edit, code search). Extended reasoning was
on.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [ ] All Paperclip CI gates are green
- [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>