AgentWorkforce/burn ledger-v0.20.0 on GitHub

[0.20.0] - 2026-04-26

Derived analytics archive (#40, foundation PR). New archive.sqlite materialized read model alongside the canonical ledger.jsonl, exposed via buildArchive(), rebuildArchive(), getArchiveStatus(), and openArchive(). Schema covers sessions, turns, tool_calls, compactions, and a reserved tool_result_events table for the future content-sidecar bridge (#33). Stamps are folded into materialized columns (workflow_id, agent_id, persona, tier) plus a JSON blob, so consumers no longer have to fold the full stamp set on every query. Build is incremental keyed off archive_state.ledger_offset_bytes, and rebuild-from-zero is deterministic — deleting archive.sqlite and rebuilding always reproduces the same row counts. Backed by node:sqlite so no native build step. New archivePath() exported alongside the existing path helpers.