Release v0.2.0 · ByronFinn/byf

What

Release 0.2.0 brings prompt caching, context minimization, CLI TUI decomposition, telemetry removal, and several stability fixes.

PromptPlan module — structured prompt caching with turn-boundary cache staking (3+1 model) and Anthropic cache breakpoints
RecordRestoreHandler — handler-based distributed restoration across all subsystems in agent-core
Observation masking — importance-based context minimization that replaces old tool results with structured summaries when token pressure exceeds thresholds
Output offloading & multi-pass compaction — large tool outputs offloaded to scratch files; FullCompaction.beforeStep() runs four passes (offloading → masking → pruning → LLM compaction)
LLM latency metrics — llmFirstTokenLatencyMs and llmStreamDurationMs emitted on turn.step.completed events
Interactive logout selector — /logout opens interactive provider selector instead of requiring a provider name argument
DirectoryTreeInjector — dynamic 2-level directory tree injection at session start

ByfTui decomposition — extracted DialogHost, TranscriptRenderer, SessionMetaHandler, SubagentEventHandler, TurnEventHandler, LoginFlow, ConnectFlow, TasksBrowserController (5623 → 4345 lines, +138 tests)
System prompt refactor — reduced from 174 to ~80 lines
Tool descriptions compression — compressed Read, Glob, Edit, Write, Bash, Agent, Grep descriptions
Login catalog enrichment — capability registry improvements

Tool result pairing — coerces malformed isError=true results, preventing orphaned tool.call entries
Terminal exit — clean exit on terminal disappearance (SIGHUP + dead-terminal I/O)
Permission policy — adjusted evaluation order per mode
Base URL input — removed initialValue from Base URL input in login flow

Telemetry removal — deleted packages/telemetry
SSH removal — deleted ssh.ts from Kaos
Plan mode residuals — removed all Plan Mode references
Dead code — removed 16 unused imports, dead barrel files, 14 skipped test blocks