[aiapienthusiast]

Summary

Add a cheaper-inference memory provider preset.
It follows the atlas-cloud preset from #360.

Cheaper Inference is an OpenAI-compatible LLM gateway.

The preset reuses the OpenAI Chat Completions provider.
It only sets the endpoint, the default model, and the session provider tag.
A minimal config needs only the provider and an API key:

"memoryProvider": "cheaper-inference",
"memoryApiKey": "env://CHEAPER_INFERENCE_API_KEY",

memoryApiUrl defaults to https://api.cheaperinference.com/v1.
memoryModel defaults to gpt-5.4-mini.
If memoryApiKey is not set, CHEAPER_INFERENCE_API_KEY from the environment is used.

Details

• src/services/ai/providers/cheaper-inference.ts: new provider class, same shape as atlas-cloud.ts.
• ai-provider-factory.ts, provider-config.ts, session-types.ts, types/index.ts, config.ts: wire the new id like atlas-cloud.
• config.ts: env key fallback and preset status handling, same as atlas-cloud.
• opencode-mem.example.jsonc, config template, README.md and the 5 translated READMEs: preset docs and data-transfer note.
• Tests: tests/cheaper-inference-provider.test.ts, plus cases in ai-provider-config.test.ts and config-resolution.test.ts.
• Live check: gpt-5.4-mini returned a save_memories tool call through CheaperInferenceProvider.executeToolCall.

Test plan

• Exercised the change locally (or N/A for docs/meta-only)
• Noted any follow-up or known limitations

Checklist

• Branch is based on main (do not open PRs from commits already on main)
• bun test passes (or N/A)
• bun run typecheck passes (or N/A)
• bun run check passes (format + lint + typecheck; or N/A)
• Docs / README updated when behavior or contribution process changes

[EyJunge1]

Reviewed the preset wiring against atlas-cloud: factory, config/env fallback, preset status, docs/i18n, and tests look complete and consistent.

Pushed a maintainer update onto this branch:

• merged current main (resolves the dirty/conflict state from the README → i18n/ move)
• tiny test wording fix

Focused provider/config tests + typecheck passed locally after the merge.