[PATCH] devtools: support local opencode agent for patch review

[Stephen Hemminger]

On Fri,  3 Jul 2026 17:19:02 +0800
datshan at qq.com wrote:

> From: Chengwen Feng <fengchengwen at huawei.com>
> 
> Currently review-patch.py only supports cloud AI providers
> (Anthropic, OpenAI, xAI, Google) via REST API, requiring API keys.
> 
> Add a --via option that invokes the locally installed opencode CLI as
> the review runner instead of making HTTP calls. opencode reads
> AGENTS.md from the DPDK project directory automatically, needing no
> configuration beyond opencode on PATH.
> 
> The --via and -p/--provider options are independent -- via routes to
> the local agent mode while -p continues to use the cloud API path.
> 
> Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
> ---

So most of this script was AI generated, turned back to AI
to look at this change...


Thanks for the patch - the opencode integration looks sound. The
--format json parsing matches what the CLI actually emits, and the
_run_review refactor is a clean way to share the dispatch. A few items:

Bug:
- subprocess.run() can raise TimeoutExpired, but only FileNotFoundError
  is caught, so a timeout gives a raw traceback. Catch
  subprocess.TimeoutExpired and route it through error() like the cloud
  path does.

Please clarify / fix:
- -a/--agents is silently ignored in --via mode; opencode auto-loads
  AGENTS.md from --dir, which you set to the repo root while AGENTS.md
  lives under devtools/ai/. Does opencode actually find the guidelines?
  If not the review runs without them.
- JSON metadata still reports "provider": args.provider (stays
  "anthropic" under --via); use (args.via or args.provider) as you
  already did for the token summary.
- --large-file modes are silently skipped in via mode - intended? A
  warning would help.

Nits: non-ASCII em-dash in a prompt string (use --); the trailing "--"
before the message is unnecessary and may drop the prompt; redundant
import tempfile; unused max_tokens param; f-string with no placeholder;
run black on the full_message assignment.