feat: split codex-common into smaller utils crates (#11422)

We are removing feature-gated shared crates from the `codex-rs`
workspace. `codex-common` grouped several unrelated utilities behind
`[features]`, which made dependency boundaries harder to reason about
and worked against the ongoing effort to eliminate feature flags from
workspace crates.

Splitting these utilities into dedicated crates under `utils/` aligns
this area with existing workspace structure and keeps each dependency
explicit at the crate boundary.

## What changed

- Removed `codex-rs/common` (`codex-common`) from workspace members and
workspace dependencies.
- Added six new utility crates under `codex-rs/utils/`:
  - `codex-utils-cli`
  - `codex-utils-elapsed`
  - `codex-utils-sandbox-summary`
  - `codex-utils-approval-presets`
  - `codex-utils-oss`
  - `codex-utils-fuzzy-match`
- Migrated the corresponding modules out of `codex-common` into these
crates (with tests), and added matching `BUILD.bazel` targets.
- Updated direct consumers to use the new crates instead of
`codex-common`:
  - `codex-rs/cli`
  - `codex-rs/tui`
  - `codex-rs/exec`
  - `codex-rs/app-server`
  - `codex-rs/mcp-server`
  - `codex-rs/chatgpt`
  - `codex-rs/cloud-tasks`
- Updated workspace lockfile entries to reflect the new dependency graph
and removal of `codex-common`.

codex-rs/exec/src/cli.rs

@@ -2,7 +2,7 @@ use clap::Args;
 use clap::FromArgMatches;
 use clap::Parser;
 use clap::ValueEnum;
-use codex_common::CliConfigOverrides;
+use codex_utils_cli::CliConfigOverrides;
 use std::path::PathBuf;
 
 #[derive(Parser, Debug)]
@@ -38,7 +38,7 @@ pub struct Cli {
     /// Select the sandbox policy to use when executing model-generated shell
     /// commands.
     #[arg(long = "sandbox", short = 's', value_enum)]
-    pub sandbox_mode: Option<codex_common::SandboxModeCliArg>,
+    pub sandbox_mode: Option<codex_utils_cli::SandboxModeCliArg>,
 
     /// Configuration profile from config.toml to specify default options.
     #[arg(long = "profile", short = 'p')]

codex-rs/exec/src/event_processor_with_human_output.rs

@@ -1,5 +1,3 @@
-use codex_common::elapsed::format_duration;
-use codex_common::elapsed::format_elapsed;
 use codex_core::config::Config;
 use codex_core::protocol::AgentMessageEvent;
 use codex_core::protocol::AgentReasoningRawContentEvent;
@@ -36,6 +34,8 @@ use codex_core::protocol::WebSearchEndEvent;
 use codex_core::web_search::web_search_detail;
 use codex_protocol::items::TurnItem;
 use codex_protocol::num_format::format_with_separators;
+use codex_utils_elapsed::format_duration;
+use codex_utils_elapsed::format_elapsed;
 use owo_colors::OwoColorize;
 use owo_colors::Style;
 use shlex::try_join;
@@ -46,9 +46,9 @@ use std::time::Instant;
 use crate::event_processor::CodexStatus;
 use crate::event_processor::EventProcessor;
 use crate::event_processor::handle_last_message;
-use codex_common::create_config_summary_entries;
 use codex_protocol::plan_tool::StepStatus;
 use codex_protocol::plan_tool::UpdatePlanArgs;
+use codex_utils_sandbox_summary::create_config_summary_entries;
 
 /// This should be configurable. When used in CI, users may not want to impose
 /// a limit so they can see the full transcript.

codex-rs/exec/src/lib.rs

@@ -14,8 +14,6 @@ pub use cli::Cli;
 pub use cli::Command;
 pub use cli::ReviewArgs;
 use codex_cloud_requirements::cloud_requirements_loader;
-use codex_common::oss::ensure_oss_provider_ready;
-use codex_common::oss::get_default_model_for_oss_provider;
 use codex_core::AuthManager;
 use codex_core::LMSTUDIO_OSS_PROVIDER_ID;
 use codex_core::NewThread;
@@ -43,6 +41,8 @@ use codex_protocol::approvals::ElicitationAction;
 use codex_protocol::config_types::SandboxMode;
 use codex_protocol::user_input::UserInput;
 use codex_utils_absolute_path::AbsolutePathBuf;
+use codex_utils_oss::ensure_oss_provider_ready;
+use codex_utils_oss::get_default_model_for_oss_provider;
 use event_processor_with_human_output::EventProcessorWithHumanOutput;
 use event_processor_with_jsonl_output::EventProcessorWithJsonOutput;
 use serde_json::Value;

codex-rs/exec/src/main.rs

@@ -11,9 +11,9 @@
 //! of the `codex-exec` binary.
 use clap::Parser;
 use codex_arg0::arg0_dispatch_or_else;
-use codex_common::CliConfigOverrides;
 use codex_exec::Cli;
 use codex_exec::run_main;
+use codex_utils_cli::CliConfigOverrides;
 
 #[derive(Parser, Debug)]
 struct TopCli {