## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - Agent adapters translate Paperclip configuration into the
CLI/runtime flags needed by each provider.
> - Hermes custom providers are represented as `custom:*` values, but
the adapter registry was not passing that provider value through as
Hermes CLI arguments.
> - The fix is isolated to adapter argument construction and its
regression tests.
> - This pull request extracts only the Hermes custom-provider
pass-through fix onto `origin/master`.
> - The benefit is a small adapter PR that can merge independently from
UI, skills catalog, and migration work.
## Linked Issues or Issue Description
No GitHub issue exists for this branch split. Internal source task:
[PAP-11234](/PAP/issues/PAP-11234).
Problem/motivation:
- Hermes `custom:*` providers need to reach the Hermes process as
`--provider <value>`.
- The adapter should preserve existing auth injection and avoid adding
duplicate provider flags when the user already supplied one.
Proposed solution:
- Detect Hermes `custom:*` provider values in adapter registry argument
construction.
- Add `--provider <custom value>` unless an explicit provider arg
already exists.
- Cover both spaced and equals-style existing provider args in
regression tests.
Related PR search:
- Found related Hermes adapter PRs such as #7544 and #3027, but none
duplicates this specific custom-provider arg pass-through behavior.
Roadmap alignment:
- Checked `ROADMAP.md`; no duplicate planned item was found for this
adapter fix.
## What Changed
- Updated Hermes adapter registration argument construction to pass
`custom:*` providers through `extraArgs` as `--provider <value>`.
- Preserved existing auth injection behavior.
- Avoided duplicate provider arguments when `--provider value` or
`--provider=value` is already present.
- Added adapter registry regression coverage.
## Verification
- `CI=true NODE_ENV=development pnpm install --frozen-lockfile
--prefer-offline`
- `pnpm exec vitest server/src/__tests__/adapter-registry.test.ts --run`
— 1 file, 20 tests passed.
## Risks
- Low risk; change is scoped to Hermes adapter argument construction.
- Review should confirm the provider flag syntax matches current Hermes
CLI expectations.
> 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 Codex via Paperclip `codex_local` / CodexCoder, GPT-5-class
coding model with tool use and shell execution. Exact runtime snapshot
and context-window setting were not exposed by the Paperclip run
context.
## 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 available from the run context)
- [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 run tests locally and they pass
- [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 change)
- [x] I have updated relevant documentation to reflect my changes (N/A;
no docs behavior changed)
- [x] I have considered and documented any risks above
- [ ] All Paperclip CI gates are green (pending on draft PR)
- [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
(pending follow-up loop)
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
Dotta
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