Struct DeltaDisplayFormatter 

pub struct DeltaDisplayFormatter { /* private fields */ }

Delta display formatter

Formats delta content for user display with consistent styling across all parsers.

Implementations

impl DeltaDisplayFormatter

pub const fn new() -> Self

Create a new formatter with default settings

pub fn format_thinking( &self, content: &str, prefix: &str, colors: Colors, terminal_mode: TerminalMode, ) -> String

Format thinking content specifically.

Thinking content has special formatting to distinguish it from regular text.

Terminal Mode Behavior

• TerminalMode::Full / TerminalMode::Basic: May include ANSI colors.
• TerminalMode::None: MUST be plain text (no ANSI sequences).

pub fn format_tool_input( &self, content: &str, prefix: &str, colors: Colors, terminal_mode: TerminalMode, ) -> String

Format tool input specifically

Tool input is shown with appropriate styling.

Terminal Mode Behavior

• Full mode (TTY): Renders the full [prefix] └─ content pattern for each delta, providing real-time feedback with clarity about which agent’s tool is being invoked.

• Basic/None modes (non-TTY): Suppresses per-delta output to prevent repeated prefixed lines in logs and CI output. Tool input is accumulated and rendered ONCE at completion boundaries (message_stop).

CCS Spam Prevention (Bug Fix)

This implementation prevents repeated “[ccs/glm]” and “[ccs/codex]” prefixed lines for tool input deltas in non-TTY modes. The fix is validated with comprehensive regression tests that simulate real-world streaming scenarios.

See comprehensive regression tests:

• tests/integration_tests/ccs_delta_spam_systematic_reproduction.rs (NEW: systematic reproduction test)
• tests/integration_tests/ccs_all_delta_types_spam_reproduction.rs (comprehensive coverage)
• tests/integration_tests/ccs_nuclear_spam_test.rs (tool input with 500+ deltas)
• tests/integration_tests/ccs_streaming_spam_all_deltas.rs (all delta types including tool input)

Future Enhancement

For streaming tool inputs with multiple deltas in Full mode, consider suppressing the [prefix] on continuation lines to reduce visual noise:

• First tool input line: [prefix] Tool: name
• Continuation: └─ more input (aligned, no prefix)

This would require tracking whether the prefix has been displayed for the current tool block, likely via the streaming session state.

Trait Implementations

impl Default for DeltaDisplayFormatter

fn default() -> Self

Returns the “default value” for a type.