Add Chatgpt provider

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- ChatGPT subscription provider
+
 ### Fixed
 
 - Fix local model binding on startup

Cargo.toml

@@ -11,6 +11,7 @@ llm = { path = "crates/llm" }
 reqwest = { version = "0.13", features = ["json", "stream"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+sha2 = "0.10"
 strum = { version = "0.28", features = ["derive"] }
 thiserror = "2"
 tokio = { version = "1.53", features = ["full"] }

README.md

@@ -72,6 +72,10 @@ Alan currently supports:
 - **OpenRouter**
 - **DeepSeek**
 - **Zai** (beta)
+- **ChatGPT** (beta, unofficial): signs in with your own ChatGPT subscription
+  account through the browser. OpenAI has not published this backend, so
+  access depends on OpenAI's terms and may stop working at any time. Personal
+  use only; not for hosted or multi-user apps.
 
 Use the `/login` command to sign in to any of the available providers.
 

crates/alan/src/core/skills.rs

@@ -18,7 +18,7 @@ use std::path::{Path, PathBuf};
 
 /// Maximum characters of instructions kept per skill. A skill whose
 /// body is longer is skipped entirely.
-const MAX_INSTRUCTIONS: usize = 25_000;
+const MAX_INSTRUCTIONS: usize = 50_000;
 
 /// Maximum characters kept for a description. Descriptions are popup text, not
 /// instructions, so a long one is a sign of a malformed file.