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Move Models API, Verification API, and streaming logs into accordion sections

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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Bryan Helmkamp 2026-03-07 11:02:03 -05:00
parent 5877d203ed
commit a15425762e
1 changed files with 6 additions and 16 deletions
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docs/changelog/2026-03-07.mdx
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@ -3,14 +3,6 @@ title: "Models API, exe.dev sandboxes, and auto-install agent CLIs"
date: "2026-03-07"
---
## Models API endpoint
A new `GET /models` endpoint exposes the full LLM model catalog via the REST API. This is the same data available through `arc models list` on the CLI, now accessible to the web UI and API consumers. Results are paginated.
```bash
curl -H "Authorization: Bearer $TOKEN" https://your-arc-server/models
```
## exe.dev sandbox provider (beta)
Arc can now run agent stages inside ephemeral [exe.dev](https://exe.dev) VMs as an alternative to Daytona sandboxes. The new `arc-exe` crate manages VM lifecycle through SSH — a management plane connection to `exe.dev` for creating and destroying VMs, and a data plane connection to the VM itself for command execution and file I/O.
@ -24,18 +16,10 @@ environment = "exe"
Agent CLI tools (like `claude` or `codex`) are now automatically detected and installed inside sandboxes at runtime when they're missing. This includes installing Node.js via NodeSource if needed. Previously, you had to build custom Dockerfiles that pre-installed every CLI tool your workflow used.
## Verification API restructured
The verification API has been reorganized from a flat `/verifications` namespace into distinct resources: `/verification/criteria` and `/verification/controls`. The run sub-resource path is now singular: `/runs/{id}/verification`.
## Updated model catalog
The default OpenAI model has been upgraded from gpt-5.3 to **gpt-5.4**. New models added to the catalog include **gpt-5.3-codex-spark** and **claude-sonnet-4-6**. Model defaults are now centralized in the catalog rather than hardcoded across crates.
## Streaming stage logs for CLI agents
Stage logs now update in real-time while CLI agents are working. Arc syncs `cli_stdout.log` and `cli_stderr.log` to the stage directory on each poll iteration, so you can see what an agent is doing before it finishes — useful for long-running stages.
<Warning>
**Verification API paths have changed.** `/verifications` is now split into `/verification/criteria` and `/verification/controls`. The run sub-resource moved from `/runs/{id}/verifications` to `/runs/{id}/verification`.
@ -46,7 +30,13 @@ To migrate:
## More
<Accordion title="API">
- New `GET /models` endpoint exposes the full LLM model catalog via the REST API with pagination
- Verification API reorganized: `/verifications` split into `/verification/criteria` and `/verification/controls`; run sub-resource path is now `/runs/{id}/verification`
</Accordion>
<Accordion title="Workflows">
- Stage logs now stream in real-time while CLI agents are working, so you can see progress before a stage finishes
- Sub-workflow context diffs no longer leak child engine-internal keys (`internal.*`, `graph.*`, `thread.*`) into the parent run
</Accordion>