Files
PaperClipAI/doc
DottaandClaude Opus 5.5 c02fd8d427 docs(plans): salvage-then-retire design for kept restore-source and done-task warm sandboxes (#20087)
## Thinking Path

- Paperclip keeps some remote sandboxes after their run: warm ones for
reuse, and failed runs' stopped sandboxes as workspace-restore sources.
- In the warm Daytona chaos waves for #20048, the real leaks were
restore sources that nothing retires once a user Retry closes their
recovery actions. Separately, a done task's suspended warm sandbox is
only destroyed when its environment is deleted.
- Retiring them early needs a provider-I/O salvage step: compare against
the durable save, export anything unsaved to the issue, then destroy.
That spans recovery, storage, attachments and teardown. The coordinator
asked for a design note so it can be its own reviewed task instead of a
rushed patch.

## Linked Issues or Issue Description

Refs #20048, #20085, #20086

**What happened?**
Closed restore sources and done-task warm sandboxes stay suspended until
their environment is deleted, costing storage. No path compares them
with the last durable save or exports their unsaved files before
retirement.

**Steps to reproduce**
1. A run fails; its sandbox is kept as a `retain_on_failure` restore
source.
2. The user clicks Retry; a fresh run succeeds and the task is done.
3. The restore-source sandbox is never retired until the environment is
deleted.

**Expected behavior**
After a clean compare, or a confirmed export of anything unsaved to the
issue, the sandbox is destroyed. If salvage fails, it stays suspended
and is retried.

## What Changed

- `doc/plans/2026-11-08-restore-source-salvage-and-warm-retirement.md`:
a design for one owned kind (`environment_kept_sandbox_retirement`) on
the shared reconciler. It covers listing rules for both cases (24 h
default retention for done-task warm sandboxes), a three-stage salvage
state machine (compare, export, retire) with a provider-I/O step and
receipt table, failure handling that never destroys without proof, and
the test plan.

## Verification

Docs only; no code or tests changed.

## Risks

None at runtime. Additive documentation.

## Model Used

Claude Opus 5.5 (`claude-opus-5-5`, Anthropic), 1M context window, tool
use and code execution, via Claude Code.

## 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>
2026-11-08 14:13:05 -06:00
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