## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - The heartbeat system records agent runs and can add a run summary to
an issue.
> - The ACPX engine receives output text and internal thought text as
separate streams.
> - The default summary strategy joined both streams and could publish
internal text in an issue comment.
> - Paperclip already has final-output segmentation for run summaries.
> - This pull request makes final-output-only summaries mandatory and
removes the configuration bypass.
> - The benefit is that automatic issue comments contain the intended
final message instead of internal execution text.
## Linked Issues or Issue Description
Refs #11761
**What happened?**
The ACPX engine used the full summary strategy when an adapter did not
set `summaryStrategy`. That strategy joined all text deltas, including
thought-stream text and intermediate narration. The heartbeat finalizer
could then store that summary as an issue comment.
**Expected behavior**
An automatic issue comment must use only the final output segment.
Configuration must not allow thought-stream text or intermediate
narration into that summary.
**Steps to reproduce**
1. Run an ACPX adapter without a configured `summaryStrategy`.
2. Emit an output delta, a thought delta, a tool call, and a final
output delta.
3. Read the generated run summary.
4. Observe that the old default included all text deltas.
**Paperclip version or commit**
`54b8bec44417511c623999613f9f1006f8af0517`
**Deployment mode**
Built from source with a local ACPX adapter.
## What Changed
- Limit ACPX run summaries to the final non-empty output segment.
- Ignore the legacy full-summary setting so configuration cannot bypass
containment.
- Update regression tests for the safe default and an attempted unsafe
override.
## Verification
- Observed the new guard fail before the implementation change because
the summary contained thought text.
- Ran `pnpm exec vitest run
packages/adapter-utils/src/acpx-engine/execute.test.ts -t "defaults run
summaries to the final output segment without thought text|does not
allow configuration to include thought text in run summaries"`. Result:
2 passed.
- Ran `pnpm exec vitest run
packages/adapter-utils/src/acpx-engine/execute.test.ts`. Result: 130
passed.
- Ran `pnpm --filter @paperclipai/adapter-utils typecheck`. Result:
passed.
## Risks
- Run summaries are shorter for adapters that relied on full text
aggregation.
- The old `summaryStrategy: "full"` setting no longer changes summary
behavior. This is an intentional containment change.
- The change does not alter run logs or tool events. It changes only the
summary selected for downstream use.
> This is a focused security and privacy bug fix. It does not add
roadmap scope.
## Model Used
- OpenAI Codex on the GPT-5 family. The runtime did not expose the exact
model ID or context-window size. Reasoning, tool use, terminal
execution, and code editing were enabled.
## 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 and contains no internal task
id
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant inline 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
- [ ] I will address all Greptile and reviewer comments before
requesting merge
Server tests that need a real PostgreSQL process must use
./helpers/embedded-postgres.ts instead of constructing embedded-postgres
directly.
The shared helper creates a throwaway data directory and a reserved-safe
loopback port for each test database. This protects the live Paperclip
control-plane Postgres from server vitest runs; see PAP-2033 for the incident
that introduced this guard.
nearfolk
c2cfd55e97