M0: Add Cargo workspace with 4-crate skeleton

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+
+## [Unreleased]
+
+### Added
+
+- Cargo workspace with 4 crates: zeph-core, zeph-llm, zeph-skills, zeph-memory
+- Binary entry point with version display
+- Default configuration file
+- Workspace-level dependency management and lints

Cargo.toml

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+[workspace]
+members = ["crates/*"]
+resolver = "3"
+
+[workspace.package]
+edition = "2024"
+authors = ["bug-ops"]
+license = "MIT"
+repository = "https://github.com/bug-ops/zeph"
+
+[workspace.dependencies]
+anyhow = "1.0"
+serde = { version = "1.0", features = ["derive"] }
+thiserror = "2.0"
+tokio = { version = "1", features = ["full"] }
+tracing = "0.1"
+tracing-subscriber = "0.3"
+
+[workspace.lints.clippy]
+all = "warn"
+pedantic = "warn"
+
+[package]
+name = "zeph"
+version = "0.1.0"
+edition.workspace = true
+authors.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+zeph-core = { path = "crates/zeph-core" }
+
+[lints]
+workspace = true

config/default.toml

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+[agent]
+name = "Zeph"
+
+[llm]
+provider = "ollama"
+base_url = "http://localhost:11434"
+model = "mistral:7b"
+
+[skills]
+paths = ["./skills"]
+
+[memory]
+sqlite_path = "./data/zeph.db"
+history_limit = 50

crates/zeph-core/Cargo.toml

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+[package]
+name = "zeph-core"
+version = "0.1.0"
+edition.workspace = true
+authors.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+
+[lints]
+workspace = true

crates/zeph-core/src/lib.rs

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+//! Agent loop, configuration loading, and context builder.

crates/zeph-llm/Cargo.toml

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+[package]
+name = "zeph-llm"
+version = "0.1.0"
+edition.workspace = true
+authors.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+
+[lints]
+workspace = true

crates/zeph-llm/src/lib.rs

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+//! LLM provider abstraction and backend implementations.

crates/zeph-memory/Cargo.toml

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+[package]
+name = "zeph-memory"
+version = "0.1.0"
+edition.workspace = true
+authors.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+
+[lints]
+workspace = true

crates/zeph-memory/src/lib.rs

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+//! SQLite-backed conversation persistence.

crates/zeph-skills/Cargo.toml

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+[package]
+name = "zeph-skills"
+version = "0.1.0"
+edition.workspace = true
+authors.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+
+[lints]
+workspace = true

crates/zeph-skills/src/lib.rs

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+//! SKILL.md loader, skill registry, and prompt formatter.

src/main.rs

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+fn main() {
+    let version = env!("CARGO_PKG_VERSION");
+    println!("zeph v{version}");
+}