fix(opencode): use deepseek flash for code-reviewer agent

[shunkakinoki]

Summary

• Switch code-reviewer agent model from anthropic/claude-sonnet-4-20250514 to shunkakinoki/deepseek-v4-flash
• Template uses __DEEPSEEK_FLASH__ placeholder for hydration via models.json
• Avoids Anthropic quota/auth errors that were triggering fallback on every code-review session

Test plan

• Run opencode with code-reviewer agent and verify it uses deepseek-v4-flash
• Confirm fallback log no longer shows anthropic model failures for code-reviewer

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Summary by cubic

Switch the code-reviewer agent to shunkakinoki/deepseek-v4-flash and introduce __DEEPSEEK_FLASH__ in the template for hydration via models.json. This avoids Anthropic quota/auth failures that were triggering fallback during reviews.

^{Written for commit 090645b. Summary will update on new commits.}

[indent-zero]

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PR Summary

Switches the opencode code-reviewer agent from Anthropic Claude Sonnet 4 to the CLIProxy-routed Deepseek Flash model to align it with the repo's default model provider. Applied consistently to the rendered config and its template so llm-update.sh output stays in sync.

• Change agent.code-reviewer.model from anthropic/claude-sonnet-4-20250514 to shunkakinoki/deepseek-v4-flash in config/opencode/opencode.jsonc
• Mirror the change in config/opencode/opencode.tpl.jsonc using the __DEEPSEEK_FLASH__ placeholder

Issues

1 potential issue found:

• Nit: agent.code-reviewer.model (shunkakinoki/deepseek-v4-flash) now duplicates the top-level default model in opencode.jsonc, making the override redundant — consider dropping the line unless the explicit pin is intentional to guard against future default changes. → Autofix

CI Checks

Waiting for CI checks...

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Run ID: b7f94e5e-1ee0-4f35-904b-40b8ed5d9e2a

📥 Commits

Reviewing files that changed from the base of the PR and between a83c3df and 090645b.

📒 Files selected for processing (2)

• config/opencode/opencode.jsonc
• config/opencode/opencode.tpl.jsonc

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[indent-zero]

Redundant with top-level default: The top-level model at line 3 is already shunkakinoki/__DEEPSEEK_FLASH__, so this per-agent model override resolves to the same value. The code-reviewer agent block only needs to differ from the default via its prompt and tools (which are the meaningful overrides). You can drop this line unless you want to explicitly pin the reviewer's model so it doesn't drift if you change the top-level default later. Same applies to config/opencode/opencode.jsonc:9.