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PaperClipAI/doc
DottaandPaperclip 7a52dcdc74 fix: repair MCP validation and cancelled execution recovery (#14951)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - The tool gateway gives agents access to connected services. Recovery
controls what happens when a run stops.
> - Generated tool names can exceed the provider limit after the MCP
client adds its prefix.
> - The same invalid definition can fail each automatic retry. A
cancelled run can also hold saved messages without showing its cause.
> - This pull request bounds tool names, stops configuration retries,
and retains cancellation evidence.
> - It shows the stopped run and admits saved input only after the
existing safety checks pass.
> - The benefit is a clear recovery path that preserves operator Stop
and prevents duplicate message delivery.

## Linked Issues or Issue Description

**What happened?**

A long connected MCP tool name makes the provider reject the entire
request. Automatic recovery repeats the invalid request. Separately,
unexpected legacy cancellations can leave saved input behind a recovery
hold. The notice does not identify the stopped run or its cause.

**Expected behavior**

Complete MCP names fit the provider limit. Tool-definition errors
require configuration repair. Cancelled runs retain their source and
reason. The recovery notice shows the cause and saved-message count.
Verified unexpected cancellations can start a fresh turn through the
existing admission checks.

**Steps to reproduce**

1. Assign an App gallery connection with a long application key and tool
name to a Claude agent.
2. Start a run. The provider rejects a name over 128 characters,
including its MCP prefix.
3. For cancellation recovery, stop a legacy provider turn without an
operator Stop request and send a user message while the recovery hold is
active.
4. Inspect the recovery notice and the deferred message queue.

**Paperclip version or commit**

Rebased onto master at `cf8ad63c806685bfd7c48e3ed4a919d61a7c55f1`.

**Deployment mode**

Hosted or self-hosted server with legacy Claude or Codex execution.

Related public work:

- Refs #14017. That PR caps name segments. This PR preserves existing
short names and uses stable hash aliases for long complete names. It
also covers classification and recovery.
- Refs #4510. That PR adds a cancellation-source column. This PR records
bounded evidence in the existing run result, without a migration.
- Refs #12552 and #4506. Those PRs suppress recovery after operator
cancellation. This PR preserves operator intent and uses the existing
continuation gates.

## What Changed

- Bound gateway names with the full provider prefix in the 128-character
budget. Retain the original upstream tool name for dispatch and
permissions.
- Classify invalid tool definitions as configuration failures before
diagnostic redaction. Stop automatic retries and continuation attempts
for that error code.
- Persist cancellation source, expectedness, initiator, reason, and
time. Preserve recorded Stop intent when adapter results arrive. Report
unexpected started cancellations with closed diagnostic labels.
- Show the run cause, saved-message count, and Inspect run link. Offer
Continue for eligible unexpected cancellations. Require verified
provider stop, empty tool inventory, ownership, and the existing pause,
budget, approval, and dependency gates. Use the existing queue for
single delivery.
- Add regression coverage and update the execution, MCP gateway, and
run-log documentation.

## Verification

- `pnpm -r typecheck` and `pnpm build` passed.
- `pnpm check:token-gates` passed.
- Ran `pnpm test:run` and completed its workspace and serialized groups.
Initial resource and timing failures passed on isolated reruns. All 149
serialized route suites passed.
- Reran the changed server, adapter, and UI suites after the rebase.
Coverage includes long-name upstream dispatch, configuration retry
suppression, cancellation evidence retention, privacy labels, oversized
run projection, and concurrent saved-message delivery.
- `pnpm test:e2e tests/e2e/legacy-failure-continuation.spec.ts` passed
all six browser scenarios. The recovery notice shows the run cause and
inspection link, and each recovery entry point reaches one new response.
- Added database-backed checks for active, removed, paused, unavailable,
and disabled chat connections. The final continuation and
recovery-notice suites passed 167 tests. Externally bound chats hide
board Continue and show a usable next action.
- All 55 GitHub checks passed on
`42afbf1371dcaeb72646e3d8f65c19ff7cddf8de`. Two unrelated Storybook jobs
were skipped by their normal conditions. Greptile reviewed that commit
at 5/5 with no findings and no open review threads.

## Risks

- Long tool names change to aliases. Existing short names stay
compatible. The original connection and upstream name remain the
dispatch authority.
- Invalid tool definitions no longer get automatic retries. An operator
must repair the configuration before a new attempt.
- Continuation changes apply only to positively identified unexpected
legacy cancellations with complete empty tool inventory. Operator Stop,
unknown historical cancellations, outstanding tools, and unverified
provider termination keep their holds.
- No database migration. The added projection fields are optional.
Cancellation reason and initiator IDs remain local run evidence; Sentry
receives only closed source and initiator-type labels and expectedness.

## Model Used

- OpenAI GPT-6 through Codex, with reasoning, repository editing, shell
execution, and GitHub tool use. The runtime does not expose the exact
model variant or context-window size.

## 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
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge

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Co-authored-by: Paperclip <noreply@paperclip.ing>
2026-10-02 13:47:59 -05:00
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