Config had accumulated several obsolete fields, a legacy load path
that was just returning defaults, and multi-backend infrastructure
that's no longer used.
Removed from Config (memory section):
- load_legacy_jsonl() — just returned Config::default(), no callers
- The legacy-fallback branch in load_from_file
- surface_hooks, surface_timeout_secs — zero external readers
- scoring_chunk_tokens + default fn — zero external readers
- The POC_MEMORY_CONFIG env override note in the header comment
(not actually wired up anywhere)
Collapsed multi-backend to single-backend:
- AppConfig used to carry `anthropic: BackendConfig` and
`openrouter: BackendConfig` as required fields plus an optional
`deepinfra`, picked between at runtime by name. Only one is ever
actually used in any deployment. Collapse to a single
`backend: BackendConfig` on AppConfig, drop the multi-backend
match logic in resolve_model, drop the top-level `backend: String`
selector field, drop the `BackendConfig::resolve` fallback path.
- Also drop BackendConfig.model (redundant with ModelConfig.model_id
once multi-backend is gone).
- ModelConfig.backend field goes — there's only one backend now, no
choice to make.
Dead prompt_file machinery:
- ModelConfig.prompt_file, ResolvedModel.prompt_file, SessionConfig
.prompt_file, Agent.prompt_file — nothing in the codebase actually
reads the file these strings name. Just passed around and compared.
Delete the whole string through every struct.
- The "if prompt_file changed on model switch, recompact" branch in
user/chat.rs goes too (never fired usefully).
Dead memory_project plumbing:
- AppConfig.memory_project field, CliArgs.memory_project, the
--memory-project CLI flag, the figment merge target, the show_config
display line. Nothing reads it anywhere.
Dead ContextInfo struct:
- `struct ContextInfo` was never constructed — context_info: None
was the only initializer. The conditional display blocks in
user/context.rs that dereferenced it were dead.
Behavior change: AppConfig::resolve() now requires a non-empty
`models` map and bails with a helpful message if it's missing. The
old fallback ("no models? use top-level backend + PromptConfig to
build a default") path is gone — it was only kept for symmetry with
a mode nobody used.
Config file shape: `deepinfra: {...}` → `backend: {...}`, and
model entries no longer need `backend:` or `prompt_file:`. Updated
~/.consciousness/config.json5 to match.
Co-Authored-By: Proof of Concept <poc@bcachefs.org>
2989a6afaa