docs(dox): build out the DOX AGENTS.md hierarchy

Root Child DOX Index assembled, plus a per-module AGENTS.md across the tree
(core/*, infrastructure/*, apps/*, testing/*, and docs/examples/frontend/etc),
each following the DOX section shape: Purpose, Ownership, Local Contracts,
Work Guidance, Verification, Child DOX Index.

infrastructure/inference/AGENTS.md

@@ -0,0 +1,34 @@
+# infrastructure/inference/
+
+## Purpose
+
+Inference adapter layer. The root module provides `DefaultProviderRegistry` (registers `InferenceProvider` instances) and `FirstAvailableRoutingStrategy`. Submodules cover shared HTTP client infrastructure (`commons/`) and the llama.cpp server adapter (`llama_cpp/`).
+
+## Ownership
+
+Adapter for LLM inference backends. Implements `core:inference` interfaces. No dependency on other `infrastructure:*` modules.
+
+## Local Contracts
+
+- `DefaultProviderRegistry` implements `ProviderRegistry` from `core:inference`.
+- `FirstAvailableRoutingStrategy` is the default routing policy; extend only in `core:inference`, not here.
+- All LLM responses are proposals — they must be validated by the core before affecting state (invariant #7). Adapters return raw responses; they do not validate.
+- Network calls to the llama.cpp server are environment observations; results must be recorded as events by callers if replay must reproduce them (invariant #9).
+- Model lifecycle (spawn/own the llama-server process) lives in `llama_cpp/`; the autonomous scheduler is intentionally unbuilt (see root CLAUDE.md).
+
+## Work Guidance
+
+Standard adapter rules apply (see parent `AGENTS.md`). HTTP client code uses Ktor CIO; blocking I/O in `withContext(Dispatchers.IO)`.
+
+## Verification
+
+```
+./gradlew :infrastructure:inference:test --rerun-tasks
+./gradlew :infrastructure:inference:commons:test --rerun-tasks
+./gradlew :infrastructure:inference:llama_cpp:test --rerun-tasks
+```
+
+## Child DOX Index
+
+- `commons/` — shared `ManagedInferenceProvider`, `ModelManager`, `ResourceProbe` (Nvidia/AMD), `ResidencyMode`; no separate AGENTS.md (sub-leaf, covered by this doc)
+- `llama_cpp/` — `LlamaCppInferenceProvider`, `LlamaProcess` (spawns/owns llama-server), `LlamaCppEmbedder`, `LlamaCppTokenizer`, `GbnfGrammarConverter`; no separate AGENTS.md (sub-leaf, covered by this doc)