Module opencode 

OpenCode event parser implementation

This module handles parsing and displaying OpenCode NDJSON event streams.

Streaming Output Behavior

This parser implements real-time streaming output for text deltas. When content arrives in multiple chunks (via text events), the parser:

1. Accumulates text deltas from each chunk into a buffer
2. Displays the accumulated text after each chunk
3. Uses carriage return (\r) and line clearing (\x1b[2K) to rewrite the entire line, creating an updating effect that shows the content building up in real-time
4. Shows prefix on every delta, rewriting the entire line each time (industry standard)

Example output sequence for streaming “Hello World” in two chunks:

[OpenCode] Hello\r       (first text event with prefix, no newline)
\x1b[2K\r[OpenCode] Hello World\r  (second text event clears line, rewrites with accumulated)
[OpenCode] ✓ Step finished... (step_finish shows prefix with newline)

Single-Line Pattern

The renderer uses a single-line pattern with carriage return for in-place updates. This is the industry standard for streaming CLIs (used by Rich, Ink, Bubble Tea).

Each delta rewrites the entire line with prefix, ensuring that:

• The user always sees the prefix
• Content updates in-place without visual artifacts
• Terminal state is clean and predictable

Structs

OpenCodeCache

Cache statistics

OpenCodeEvent

OpenCode event types

OpenCodeParser

OpenCode event parser

OpenCodePart

Nested part object containing the actual event data

OpenCodeTime

Time information

OpenCodeTokens

Token statistics from step_finish events

OpenCodeToolState

Tool state containing status, input, and output