## Thinking Path
> - Paperclip is a control plane for AI-agent companies
> - Heartbeats reuse adapter session state so agents can continue work
across wakeups
> - Hermes can only resume from full canonical session IDs, not
truncated display IDs
> - #6347 exposed a case where Paperclip could save invalid Hermes
output like `from`, or a shortened display ID, as resumable state
> - This pull request hardens the host-side Hermes resume path so
Paperclip only stores and reuses session IDs that can actually resume
> - The benefit is that Hermes wakeups no longer get stuck retrying bad
saved resume state
## What Changed
- Added Hermes-only validation for canonical session IDs in
`server/src/services/heartbeat.ts`.
- Stopped building Hermes resume params from truncated display IDs such
as `20260601_141558_`.
- For explicit resume-from-run wakeups, pulls the full Hermes session ID
from the run result payload after validation.
- Preserves the previous valid Hermes session state when a run fails,
times out, or is cancelled instead of replacing it with invalid adapter
output like `from`.
- Clears existing Hermes resume state that fails validation.
- Leaves non-Hermes adapter session behavior unchanged.
- Added regression coverage in
`server/src/__tests__/heartbeat-workspace-session.test.ts`.
Addresses #6347.
Supersedes #6351 and covers the full-session resume metadata handoff
from #7280.
## Verification
- `pnpm --filter @paperclipai/server exec vitest run
src/__tests__/heartbeat-workspace-session.test.ts` — passed, 50 tests.
- `pnpm --filter @paperclipai/server typecheck` — passed.
- `pnpm -r typecheck` — passed.
- `pnpm build` — passed.
- `git diff --check` — clean.
Full suite did not finish green locally; the failures were outside this
server-only heartbeat path:
- `pnpm test:run`:
- `@paperclipai/adapter-opencode-local` remote SSH tests timed out.
- `ui/src/pages/Inbox.test.tsx` failed once in `Inbox toolbar > syncs
hover with j/k selection on inbox rows`; the direct file rerun passed.
- `ui/src/components/IssueDocumentAnnotations.test.tsx` failed once in
`auto-opens the panel and focuses the thread when deep-linked`; the
direct file rerun passed.
## Risks
- Low risk: no schema, public API, shared contract, or UI changes.
- If Hermes changes its canonical session ID format, the validation
regex will need to be updated.
- Adapter-side parsing still needs its own fix; this PR prevents
non-resumable adapter output from becoming durable Paperclip resume
state.
- This does not add an immediate same-run retry after `Session not
found`; recovery happens by clearing or preserving durable resume state
for later wakeups.
> 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
- OpenAI GPT-5.5 (`openai/gpt-5.5`) via opencode, with repository
read/search tools and local shell/test execution. opencode did not
expose context-window or reasoning-mode details.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used, including exact model ID and
capability details
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally — targeted checks passed; full `pnpm
test:run` had unrelated local failures disclosed above
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots — N/A, no UI changes
- [x] I have updated relevant documentation to reflect my changes — N/A,
no user-facing docs or commands changed
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge
m.seomoon
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