Phase 1: Repository & Infrastructure Setup

- Renamed directories: codex-rs -> llmx-rs, codex-cli -> llmx-cli
- Updated package.json files:
  - Root: llmx-monorepo
  - CLI: @llmx/llmx
  - SDK: @llmx/llmx-sdk
- Updated pnpm workspace configuration
- Renamed binary: codex.js -> llmx.js
- Updated environment variables: CODEX_* -> LLMX_*
- Changed repository URLs to valknar/llmx

🤖 Generated with Claude Code

llmx-rs/core/src/openai_model_info.rs

@@ -0,0 +1,87 @@
+use crate::model_family::ModelFamily;
+
+// Shared constants for commonly used window/token sizes.
+pub(crate) const CONTEXT_WINDOW_272K: i64 = 272_000;
+pub(crate) const MAX_OUTPUT_TOKENS_128K: i64 = 128_000;
+
+/// Metadata about a model, particularly OpenAI models.
+/// We may want to consider including details like the pricing for
+/// input tokens, output tokens, etc., though users will need to be able to
+/// override this in config.toml, as this information can get out of date.
+/// Though this would help present more accurate pricing information in the UI.
+#[derive(Debug)]
+pub(crate) struct ModelInfo {
+    /// Size of the context window in tokens. This is the maximum size of the input context.
+    pub(crate) context_window: i64,
+
+    /// Maximum number of output tokens that can be generated for the model.
+    pub(crate) max_output_tokens: i64,
+
+    /// Token threshold where we should automatically compact conversation history. This considers
+    /// input tokens + output tokens of this turn.
+    pub(crate) auto_compact_token_limit: Option<i64>,
+}
+
+impl ModelInfo {
+    const fn new(context_window: i64, max_output_tokens: i64) -> Self {
+        Self {
+            context_window,
+            max_output_tokens,
+            auto_compact_token_limit: Some(Self::default_auto_compact_limit(context_window)),
+        }
+    }
+
+    const fn default_auto_compact_limit(context_window: i64) -> i64 {
+        (context_window * 9) / 10
+    }
+}
+
+pub(crate) fn get_model_info(model_family: &ModelFamily) -> Option<ModelInfo> {
+    let slug = model_family.slug.as_str();
+    match slug {
+        // OSS models have a 128k shared token pool.
+        // Arbitrarily splitting it: 3/4 input context, 1/4 output.
+        // https://openai.com/index/gpt-oss-model-card/
+        "gpt-oss-20b" => Some(ModelInfo::new(96_000, 32_000)),
+        "gpt-oss-120b" => Some(ModelInfo::new(96_000, 32_000)),
+        // https://platform.openai.com/docs/models/o3
+        "o3" => Some(ModelInfo::new(200_000, 100_000)),
+
+        // https://platform.openai.com/docs/models/o4-mini
+        "o4-mini" => Some(ModelInfo::new(200_000, 100_000)),
+
+        // https://platform.openai.com/docs/models/codex-mini-latest
+        "codex-mini-latest" => Some(ModelInfo::new(200_000, 100_000)),
+
+        // As of Jun 25, 2025, gpt-4.1 defaults to gpt-4.1-2025-04-14.
+        // https://platform.openai.com/docs/models/gpt-4.1
+        "gpt-4.1" | "gpt-4.1-2025-04-14" => Some(ModelInfo::new(1_047_576, 32_768)),
+
+        // As of Jun 25, 2025, gpt-4o defaults to gpt-4o-2024-08-06.
+        // https://platform.openai.com/docs/models/gpt-4o
+        "gpt-4o" | "gpt-4o-2024-08-06" => Some(ModelInfo::new(128_000, 16_384)),
+
+        // https://platform.openai.com/docs/models/gpt-4o?snapshot=gpt-4o-2024-05-13
+        "gpt-4o-2024-05-13" => Some(ModelInfo::new(128_000, 4_096)),
+
+        // https://platform.openai.com/docs/models/gpt-4o?snapshot=gpt-4o-2024-11-20
+        "gpt-4o-2024-11-20" => Some(ModelInfo::new(128_000, 16_384)),
+
+        // https://platform.openai.com/docs/models/gpt-3.5-turbo
+        "gpt-3.5-turbo" => Some(ModelInfo::new(16_385, 4_096)),
+
+        _ if slug.starts_with("gpt-5-codex") => {
+            Some(ModelInfo::new(CONTEXT_WINDOW_272K, MAX_OUTPUT_TOKENS_128K))
+        }
+
+        _ if slug.starts_with("gpt-5") => {
+            Some(ModelInfo::new(CONTEXT_WINDOW_272K, MAX_OUTPUT_TOKENS_128K))
+        }
+
+        _ if slug.starts_with("codex-") => {
+            Some(ModelInfo::new(CONTEXT_WINDOW_272K, MAX_OUTPUT_TOKENS_128K))
+        }
+
+        _ => None,
+    }
+}