v0.4.0

What's New

• Planner cost budgeted — the LLM call used for task decomposition now has its cost tracked and deducted from the user's budget; Plan.planner_cost exposes the cost; CLI displays it when > 0
• Parallel step execution — executor now runs independent steps concurrently via asyncio.gather(); steps declare depends_on indices in the decomposition prompt; the executor builds a DAG and launches ready steps in parallel; execute() delegates to asyncio.run(aexecute()) transparently
• Persistent spend tracking — new LedgerStore class persists execution history to a JSONL file (~/.config/tokenwise/ledger.jsonl by default); tokenwise plan --execute auto-saves; new tokenwise ledger CLI command shows history and --summary aggregates
• TOKENWISE_LEDGER_PATH — new env var / config field to customize the ledger file path

Changed

• Decomposition prompt — now asks the LLM to produce depends_on (0-indexed step indices) for each step; planner parses these and falls back to sequential chain if missing
• Executor — execute() now dispatches to async DAG-based scheduling; falls back to sequential when already inside an async event loop

Full Changelog: v0.3.0...v0.4.0