## Related work
This PR is the cleanest "add `gpt-5.5` to the codex-local catalog"
change open against master. Several other PRs propose the same
catalog/fast-mode update; they should close as duplicates once this
lands:
- #4646 — Add Codex gpt-5.5 model option
- #6044 — feat(codex-local): add gpt-5.5 to model catalog, default
reasoning to medium, cheap profile xhigh
- #6045 — feat(codex-local): add gpt-5.5 to model catalog, default
medium reasoning, xhigh cheap profile
- #6595 — feat(adapters): add new Codex models (gpt-5.5, gpt-5.4-mini,
gpt-5.3-codex, gpt-5.2)
Related issues this enables (catalog-level surface area):
- #5371 — codex_local default model selection persists `gpt-5.3-codex`
instead of adapter default. This PR makes `gpt-5.5` selectable in the
dropdown; a separate follow-up changes the *default* behavior so users
who don't pick a model are subscription-compatible.
- #5132 — opencode-local: hire-time default model fails on ChatGPT-OAuth
accounts. Sibling adapter, same problem shape; not fixed here but worth
tracking as a parallel for the opencode side.
---
## Thinking Path
> - Paperclip orchestrates AI agents through adapter-backed local and
remote runtimes.
> - The `codex_local` adapter declares built-in model options that feed
the server model list and, in turn, the agent configuration UI dropdown.
> - GPT-5.5 is available in newer Codex environments but was missing
from Paperclip's fallback `codex_local` model list.
> - Operators could still type a manual model ID, but the default
dropdown made the supported path look unavailable.
> - Codex fast mode support is declared separately, so adding GPT-5.5 to
the visible list should also include it in the supported fast-mode set.
> - This pull request adds GPT-5.5 to the built-in Codex local model
options and updates focused tests around argument generation and adapter
model listing.
> - The benefit is a clearer default setup path for agents using GPT-5.5
without changing existing defaults or migrations.
## What Changed
- Added `gpt-5.5` to the `codex_local` fallback model list.
- Added `gpt-5.5` to `CODEX_LOCAL_FAST_MODE_SUPPORTED_MODELS`.
- Updated Codex argument tests to cover GPT-5.5 fast mode and preserve
manual-model fast mode behavior.
- Updated adapter model listing tests to assert the Codex fallback list
includes GPT-5.5.
## Verification
- `pnpm exec vitest run
packages/adapters/codex-local/src/server/codex-args.test.ts
server/src/__tests__/adapter-models.test.ts`
- `git diff --check`
- UI note: this is a dropdown data-source change rather than a
layout/component change; the adapter model listing test covers the list
consumed by the UI.
## Risks
- Low risk. This only extends a static fallback model list and fast-mode
allowlist.
- Existing defaults remain unchanged (`gpt-5.3-codex`).
- If a local Codex CLI does not support `gpt-5.5`, selecting it will
still fail at execution time the same way any unavailable manual model
would.
> 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 Codex desktop coding agent, GPT-5-family model. The exact
backing model ID was not exposed by the local runtime; the session used
shell, Git, test execution, and GitHub CLI tool access.
## 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 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
- [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
---------
Co-authored-by: apple <apple@appledeMacBook-Pro.local>
Co-authored-by: Paperclip <noreply@paperclip.ing>
Co-authored-by: Devin Foley <devin@paperclip.ing>
LIXin Ye
9a48d92104