## Thinking Path
> - Paperclip is the open source app that people use to manage AI agents
for work.
> - The Codex local adapter supplies model metadata to the server and
the user interface.
> - OpenAI now lists `gpt-6-astra` as a supported Codex model.
> - Paperclip did not list this model or its model-specific controls.
> - This pull request adds the model through the existing adapter
metadata path.
> - The benefit is that agents and task overrides can use the exact
model ID and supported controls.
## Linked Issues or Issue Description
**Subsystem affected**
`packages/adapters` and `ui`
**Problem or motivation**
Paperclip does not expose `gpt-6-astra` in Codex model selectors.
Operators cannot select and save the model through the normal agent and
task forms.
**Proposed solution**
Register the exact model ID in the Codex local adapter. Use the adapter
as the source for the model-specific reasoning options. Preserve the
current default model. Forward the saved model, reasoning effort, and
fast-mode controls through both Codex execution lanes.
**Alternatives considered**
A user-interface-only model list would duplicate adapter metadata. A
model alias would not match the official model ID. Both options were
rejected.
**Roadmap alignment**
This is a small adapter compatibility update. It does not duplicate a
planned item in `ROADMAP.md`.
## What Changed
- Added `gpt-6-astra` to the Codex local adapter model registry and
fast-mode support list.
- Added the official Astra reasoning efforts: `low`, `medium`, `high`,
`xhigh`, `max`, and `ultra`.
- Used the adapter metadata in agent and task model selectors.
- Preserved supported effort choices when the model changes. Cleared an
effort only when the new model does not support it.
- Added tests for registration, user-interface selection, configuration
persistence, and CLI and ACP forwarding.
## Verification
- `pnpm exec vitest run packages/adapters/codex-local/src/index.test.ts
packages/adapters/codex-local/src/server/acp.test.ts
packages/adapters/codex-local/src/server/codex-args.test.ts
packages/adapters/codex-local/src/ui/build-config.test.ts
ui/src/lib/codex-reasoning-effort.test.ts
ui/src/components/AgentConfigForm.render.test.tsx
ui/src/components/IssueProperties.test.tsx
ui/src/components/NewIssueDialog.test.tsx
ui/src/lib/issue-assignee-overrides.test.ts` passed 245 tests.
- `pnpm -r typecheck` passed.
- `pnpm check:token-gates` passed all four gates across 939 files.
- `pnpm --filter @paperclipai/ui build` passed and supplied isolated
user-interface build proof.
- `pnpm build` passed.
- `pnpm test:run` passed 5,812 tests and failed 24 workspace-runtime
tests in this isolated host. The failures use invalid generated ports
above 65,535, incomplete nested-worktree fixture configuration, or
`/tmp` path aliases. The focused tests for this change all pass. GitHub
CI must pass before review handoff.
- GitHub CI run `33918372718` passed all required checks and the
aggregate verify gate on exact head
`6ac6be2cee0a5996c82bdf674fcb7f46cb4c5fde`.
- Independent engineering review approved the exact remediation head
after 170/170 reviewer tests passed.
- Greptile reported 5/5 with no open review threads on exact head
`6ac6be2cee0a5996c82bdf674fcb7f46cb4c5fde`.
- The model ID and capabilities were checked against the [official
OpenAI Codex model list](https://developers.openai.com/codex/models).
## Risks
- Low risk. The change adds one model and model-specific selector
options. It does not change the default model.
- OpenAI can change model capabilities later. The adapter metadata must
stay aligned with the official Codex metadata.
> 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 with model ID `gpt-5.6-sol`, a 272,000-token context
window, reasoning, tool use, and code execution.
## 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
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
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