Module ctx 

Context construction strategies — one entry point per model/provider.

This module owns the CtxBuilder trait (defined below) and the registry function for_provider (in resolver). Each concrete builder lives in its own file to keep mod.rs thin:

File	Role
mod.rs	CtxBuilder trait definition + re-exports
resolver.rs	for_provider dispatch (add new models here)
render.rs	Default render / compression-plan policy
default.rs	DefaultCtx — thin wrapper over render
ollama.rs	OllamaCtx — small-window local models
truncate.rs	Shared per-tool truncation helpers

Adding a new per-model ctx strategy:

1. Create ctx/<name>.rs with a pub struct XxxCtx and impl CtxBuilder for XxxCtx. Keep all ctor + tests + impl methods in that single file.
2. Declare pub mod <name>; below.
3. Register in resolver::for_provider.

The trait is narrow on purpose: build_messages owns the full render path for its model, including any system-prompt variation, cold-zone handling, or tool-schema trimming. The shared render and truncate modules offer building blocks that impls may call or ignore at will.

Re-exports

pub use default::DefaultCtx;

pub use env::EnvSnapshot;

pub use ollama::OllamaCtx;

pub use resolver::for_provider;

Modules

default

DefaultCtx — the fallback CtxBuilder implementation.

env

Session-start environment snapshot (C1 in CC’s taxonomy).

file_store

In-memory file content store — D3 step 1.

ollama

OllamaCtx — 为本地小窗口 Ollama 模型优化的上下文策略。

render

Default render & compression-plan policy for atomcode ctx.

resolver

for_provider — 按 provider 配置选 CtxBuilder 实现的唯一入口。

truncate

Traits

CtxBuilder

Per-session context construction strategy. Selected once at AgentLoop::new via for_provider and rebuilt on ReloadConfig.